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xianfeng |
/*
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* Procedures for interfacing to Open Firmware.
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
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* {engebret|bergner}@us.ibm.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG_PROM
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#include <stdarg.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/proc_fs.h>
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#include <linux/stringify.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/bitops.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/system.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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#include <asm/pci.h>
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#include <asm/iommu.h>
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#include <asm/btext.h>
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#include <asm/sections.h>
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#include <asm/machdep.h>
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#ifdef CONFIG_LOGO_LINUX_CLUT224
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#include <linux/linux_logo.h>
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extern const struct linux_logo logo_linux_clut224;
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#endif
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/*
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* Properties whose value is longer than this get excluded from our
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* copy of the device tree. This value does need to be big enough to
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* ensure that we don't lose things like the interrupt-map property
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* on a PCI-PCI bridge.
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*/
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#define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
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/*
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* Eventually bump that one up
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*/
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#define DEVTREE_CHUNK_SIZE 0x100000
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/*
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* This is the size of the local memory reserve map that gets copied
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* into the boot params passed to the kernel. That size is totally
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* flexible as the kernel just reads the list until it encounters an
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* entry with size 0, so it can be changed without breaking binary
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* compatibility
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*/
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#define MEM_RESERVE_MAP_SIZE 8
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/*
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* prom_init() is called very early on, before the kernel text
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* and data have been mapped to KERNELBASE. At this point the code
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* is running at whatever address it has been loaded at.
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* On ppc32 we compile with -mrelocatable, which means that references
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* to extern and static variables get relocated automatically.
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* On ppc64 we have to relocate the references explicitly with
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* RELOC. (Note that strings count as static variables.)
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*
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* Because OF may have mapped I/O devices into the area starting at
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* KERNELBASE, particularly on CHRP machines, we can't safely call
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* OF once the kernel has been mapped to KERNELBASE. Therefore all
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* OF calls must be done within prom_init().
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*
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* ADDR is used in calls to call_prom. The 4th and following
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* arguments to call_prom should be 32-bit values.
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* On ppc64, 64 bit values are truncated to 32 bits (and
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* fortunately don't get interpreted as two arguments).
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*/
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#ifdef CONFIG_PPC64
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#define RELOC(x) (*PTRRELOC(&(x)))
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#define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
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#define OF_WORKAROUNDS 0
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#else
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#define RELOC(x) (x)
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#define ADDR(x) (u32) (x)
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#define OF_WORKAROUNDS of_workarounds
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int of_workarounds;
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#endif
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#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
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#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
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#define PROM_BUG() do { \
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prom_printf("kernel BUG at %s line 0x%x!\n", \
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RELOC(__FILE__), __LINE__); \
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__asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
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} while (0)
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#ifdef DEBUG_PROM
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#define prom_debug(x...) prom_printf(x)
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#else
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#define prom_debug(x...)
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#endif
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typedef u32 prom_arg_t;
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struct prom_args {
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u32 service;
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u32 nargs;
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u32 nret;
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prom_arg_t args[10];
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};
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struct prom_t {
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ihandle root;
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phandle chosen;
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int cpu;
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ihandle stdout;
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ihandle mmumap;
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ihandle memory;
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};
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struct mem_map_entry {
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u64 base;
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u64 size;
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};
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typedef u32 cell_t;
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extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
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#ifdef CONFIG_PPC64
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extern int enter_prom(struct prom_args *args, unsigned long entry);
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#else
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static inline int enter_prom(struct prom_args *args, unsigned long entry)
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{
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return ((int (*)(struct prom_args *))entry)(args);
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}
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#endif
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extern void copy_and_flush(unsigned long dest, unsigned long src,
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unsigned long size, unsigned long offset);
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/* prom structure */
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static struct prom_t __initdata prom;
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static unsigned long prom_entry __initdata;
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#define PROM_SCRATCH_SIZE 256
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static char __initdata of_stdout_device[256];
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static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
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static unsigned long __initdata dt_header_start;
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static unsigned long __initdata dt_struct_start, dt_struct_end;
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static unsigned long __initdata dt_string_start, dt_string_end;
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static unsigned long __initdata prom_initrd_start, prom_initrd_end;
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#ifdef CONFIG_PPC64
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static int __initdata prom_iommu_force_on;
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static int __initdata prom_iommu_off;
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static unsigned long __initdata prom_tce_alloc_start;
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static unsigned long __initdata prom_tce_alloc_end;
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#endif
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/* Platforms codes are now obsolete in the kernel. Now only used within this
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* file and ultimately gone too. Feel free to change them if you need, they
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* are not shared with anything outside of this file anymore
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*/
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#define PLATFORM_PSERIES 0x0100
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#define PLATFORM_PSERIES_LPAR 0x0101
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#define PLATFORM_LPAR 0x0001
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#define PLATFORM_POWERMAC 0x0400
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#define PLATFORM_GENERIC 0x0500
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static int __initdata of_platform;
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static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
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static unsigned long __initdata alloc_top;
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static unsigned long __initdata alloc_top_high;
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static unsigned long __initdata alloc_bottom;
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static unsigned long __initdata rmo_top;
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static unsigned long __initdata ram_top;
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static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
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static int __initdata mem_reserve_cnt;
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static cell_t __initdata regbuf[1024];
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#define MAX_CPU_THREADS 2
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/*
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* Error results ... some OF calls will return "-1" on error, some
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* will return 0, some will return either. To simplify, here are
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* macros to use with any ihandle or phandle return value to check if
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* it is valid
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*/
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#define PROM_ERROR (-1u)
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#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
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#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
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/* This is the one and *ONLY* place where we actually call open
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* firmware.
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*/
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static int __init call_prom(const char *service, int nargs, int nret, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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va_start(list, nret);
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for (i = 0; i < nargs; i++)
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args.args[i] = va_arg(list, prom_arg_t);
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va_end(list);
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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if (enter_prom(&args, RELOC(prom_entry)) < 0)
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return PROM_ERROR;
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return (nret > 0) ? args.args[nargs] : 0;
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}
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static int __init call_prom_ret(const char *service, int nargs, int nret,
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prom_arg_t *rets, ...)
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{
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int i;
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struct prom_args args;
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va_list list;
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args.service = ADDR(service);
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args.nargs = nargs;
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args.nret = nret;
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260 |
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261 |
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va_start(list, rets);
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for (i = 0; i < nargs; i++)
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args.args[i] = va_arg(list, prom_arg_t);
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va_end(list);
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266 |
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for (i = 0; i < nret; i++)
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args.args[nargs+i] = 0;
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269 |
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if (enter_prom(&args, RELOC(prom_entry)) < 0)
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return PROM_ERROR;
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271 |
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272 |
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if (rets != NULL)
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273 |
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for (i = 1; i < nret; ++i)
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rets[i-1] = args.args[nargs+i];
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276 |
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return (nret > 0) ? args.args[nargs] : 0;
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277 |
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}
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278 |
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279 |
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280 |
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static void __init prom_print(const char *msg)
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281 |
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{
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282 |
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const char *p, *q;
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283 |
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struct prom_t *_prom = &RELOC(prom);
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284 |
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285 |
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if (_prom->stdout == 0)
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return;
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287 |
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288 |
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for (p = msg; *p != 0; p = q) {
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289 |
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for (q = p; *q != 0 && *q != '\n'; ++q)
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290 |
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;
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291 |
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if (q > p)
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292 |
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call_prom("write", 3, 1, _prom->stdout, p, q - p);
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293 |
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if (*q == 0)
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294 |
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break;
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295 |
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++q;
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296 |
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call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
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297 |
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}
|
298 |
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}
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299 |
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300 |
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301 |
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static void __init prom_print_hex(unsigned long val)
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302 |
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{
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303 |
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int i, nibbles = sizeof(val)*2;
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304 |
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char buf[sizeof(val)*2+1];
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305 |
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struct prom_t *_prom = &RELOC(prom);
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306 |
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307 |
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for (i = nibbles-1; i >= 0; i--) {
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308 |
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buf[i] = (val & 0xf) + '0';
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309 |
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if (buf[i] > '9')
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310 |
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buf[i] += ('a'-'0'-10);
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311 |
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val >>= 4;
|
312 |
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}
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313 |
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buf[nibbles] = '\0';
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314 |
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call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
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315 |
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}
|
316 |
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|
317 |
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|
318 |
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static void __init prom_printf(const char *format, ...)
|
319 |
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{
|
320 |
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const char *p, *q, *s;
|
321 |
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va_list args;
|
322 |
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unsigned long v;
|
323 |
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struct prom_t *_prom = &RELOC(prom);
|
324 |
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|
325 |
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va_start(args, format);
|
326 |
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#ifdef CONFIG_PPC64
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327 |
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format = PTRRELOC(format);
|
328 |
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#endif
|
329 |
|
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for (p = format; *p != 0; p = q) {
|
330 |
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for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
|
331 |
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;
|
332 |
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if (q > p)
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333 |
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call_prom("write", 3, 1, _prom->stdout, p, q - p);
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334 |
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if (*q == 0)
|
335 |
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break;
|
336 |
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if (*q == '\n') {
|
337 |
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++q;
|
338 |
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call_prom("write", 3, 1, _prom->stdout,
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339 |
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ADDR("\r\n"), 2);
|
340 |
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continue;
|
341 |
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}
|
342 |
|
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++q;
|
343 |
|
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if (*q == 0)
|
344 |
|
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break;
|
345 |
|
|
switch (*q) {
|
346 |
|
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case 's':
|
347 |
|
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++q;
|
348 |
|
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s = va_arg(args, const char *);
|
349 |
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prom_print(s);
|
350 |
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break;
|
351 |
|
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case 'x':
|
352 |
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++q;
|
353 |
|
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v = va_arg(args, unsigned long);
|
354 |
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prom_print_hex(v);
|
355 |
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break;
|
356 |
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}
|
357 |
|
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}
|
358 |
|
|
}
|
359 |
|
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|
360 |
|
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|
361 |
|
|
static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
|
362 |
|
|
unsigned long align)
|
363 |
|
|
{
|
364 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
365 |
|
|
|
366 |
|
|
if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
|
367 |
|
|
/*
|
368 |
|
|
* Old OF requires we claim physical and virtual separately
|
369 |
|
|
* and then map explicitly (assuming virtual mode)
|
370 |
|
|
*/
|
371 |
|
|
int ret;
|
372 |
|
|
prom_arg_t result;
|
373 |
|
|
|
374 |
|
|
ret = call_prom_ret("call-method", 5, 2, &result,
|
375 |
|
|
ADDR("claim"), _prom->memory,
|
376 |
|
|
align, size, virt);
|
377 |
|
|
if (ret != 0 || result == -1)
|
378 |
|
|
return -1;
|
379 |
|
|
ret = call_prom_ret("call-method", 5, 2, &result,
|
380 |
|
|
ADDR("claim"), _prom->mmumap,
|
381 |
|
|
align, size, virt);
|
382 |
|
|
if (ret != 0) {
|
383 |
|
|
call_prom("call-method", 4, 1, ADDR("release"),
|
384 |
|
|
_prom->memory, size, virt);
|
385 |
|
|
return -1;
|
386 |
|
|
}
|
387 |
|
|
/* the 0x12 is M (coherence) + PP == read/write */
|
388 |
|
|
call_prom("call-method", 6, 1,
|
389 |
|
|
ADDR("map"), _prom->mmumap, 0x12, size, virt, virt);
|
390 |
|
|
return virt;
|
391 |
|
|
}
|
392 |
|
|
return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
|
393 |
|
|
(prom_arg_t)align);
|
394 |
|
|
}
|
395 |
|
|
|
396 |
|
|
static void __init __attribute__((noreturn)) prom_panic(const char *reason)
|
397 |
|
|
{
|
398 |
|
|
#ifdef CONFIG_PPC64
|
399 |
|
|
reason = PTRRELOC(reason);
|
400 |
|
|
#endif
|
401 |
|
|
prom_print(reason);
|
402 |
|
|
/* Do not call exit because it clears the screen on pmac
|
403 |
|
|
* it also causes some sort of double-fault on early pmacs */
|
404 |
|
|
if (RELOC(of_platform) == PLATFORM_POWERMAC)
|
405 |
|
|
asm("trap\n");
|
406 |
|
|
|
407 |
|
|
/* ToDo: should put up an SRC here on p/iSeries */
|
408 |
|
|
call_prom("exit", 0, 0);
|
409 |
|
|
|
410 |
|
|
for (;;) /* should never get here */
|
411 |
|
|
;
|
412 |
|
|
}
|
413 |
|
|
|
414 |
|
|
|
415 |
|
|
static int __init prom_next_node(phandle *nodep)
|
416 |
|
|
{
|
417 |
|
|
phandle node;
|
418 |
|
|
|
419 |
|
|
if ((node = *nodep) != 0
|
420 |
|
|
&& (*nodep = call_prom("child", 1, 1, node)) != 0)
|
421 |
|
|
return 1;
|
422 |
|
|
if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
|
423 |
|
|
return 1;
|
424 |
|
|
for (;;) {
|
425 |
|
|
if ((node = call_prom("parent", 1, 1, node)) == 0)
|
426 |
|
|
return 0;
|
427 |
|
|
if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
|
428 |
|
|
return 1;
|
429 |
|
|
}
|
430 |
|
|
}
|
431 |
|
|
|
432 |
|
|
static int inline prom_getprop(phandle node, const char *pname,
|
433 |
|
|
void *value, size_t valuelen)
|
434 |
|
|
{
|
435 |
|
|
return call_prom("getprop", 4, 1, node, ADDR(pname),
|
436 |
|
|
(u32)(unsigned long) value, (u32) valuelen);
|
437 |
|
|
}
|
438 |
|
|
|
439 |
|
|
static int inline prom_getproplen(phandle node, const char *pname)
|
440 |
|
|
{
|
441 |
|
|
return call_prom("getproplen", 2, 1, node, ADDR(pname));
|
442 |
|
|
}
|
443 |
|
|
|
444 |
|
|
static void add_string(char **str, const char *q)
|
445 |
|
|
{
|
446 |
|
|
char *p = *str;
|
447 |
|
|
|
448 |
|
|
while (*q)
|
449 |
|
|
*p++ = *q++;
|
450 |
|
|
*p++ = ' ';
|
451 |
|
|
*str = p;
|
452 |
|
|
}
|
453 |
|
|
|
454 |
|
|
static char *tohex(unsigned int x)
|
455 |
|
|
{
|
456 |
|
|
static char digits[] = "0123456789abcdef";
|
457 |
|
|
static char result[9];
|
458 |
|
|
int i;
|
459 |
|
|
|
460 |
|
|
result[8] = 0;
|
461 |
|
|
i = 8;
|
462 |
|
|
do {
|
463 |
|
|
--i;
|
464 |
|
|
result[i] = digits[x & 0xf];
|
465 |
|
|
x >>= 4;
|
466 |
|
|
} while (x != 0 && i > 0);
|
467 |
|
|
return &result[i];
|
468 |
|
|
}
|
469 |
|
|
|
470 |
|
|
static int __init prom_setprop(phandle node, const char *nodename,
|
471 |
|
|
const char *pname, void *value, size_t valuelen)
|
472 |
|
|
{
|
473 |
|
|
char cmd[256], *p;
|
474 |
|
|
|
475 |
|
|
if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
|
476 |
|
|
return call_prom("setprop", 4, 1, node, ADDR(pname),
|
477 |
|
|
(u32)(unsigned long) value, (u32) valuelen);
|
478 |
|
|
|
479 |
|
|
/* gah... setprop doesn't work on longtrail, have to use interpret */
|
480 |
|
|
p = cmd;
|
481 |
|
|
add_string(&p, "dev");
|
482 |
|
|
add_string(&p, nodename);
|
483 |
|
|
add_string(&p, tohex((u32)(unsigned long) value));
|
484 |
|
|
add_string(&p, tohex(valuelen));
|
485 |
|
|
add_string(&p, tohex(ADDR(pname)));
|
486 |
|
|
add_string(&p, tohex(strlen(RELOC(pname))));
|
487 |
|
|
add_string(&p, "property");
|
488 |
|
|
*p = 0;
|
489 |
|
|
return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
|
490 |
|
|
}
|
491 |
|
|
|
492 |
|
|
/* We can't use the standard versions because of RELOC headaches. */
|
493 |
|
|
#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
|
494 |
|
|
|| ('a' <= (c) && (c) <= 'f') \
|
495 |
|
|
|| ('A' <= (c) && (c) <= 'F'))
|
496 |
|
|
|
497 |
|
|
#define isdigit(c) ('0' <= (c) && (c) <= '9')
|
498 |
|
|
#define islower(c) ('a' <= (c) && (c) <= 'z')
|
499 |
|
|
#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
|
500 |
|
|
|
501 |
|
|
unsigned long prom_strtoul(const char *cp, const char **endp)
|
502 |
|
|
{
|
503 |
|
|
unsigned long result = 0, base = 10, value;
|
504 |
|
|
|
505 |
|
|
if (*cp == '0') {
|
506 |
|
|
base = 8;
|
507 |
|
|
cp++;
|
508 |
|
|
if (toupper(*cp) == 'X') {
|
509 |
|
|
cp++;
|
510 |
|
|
base = 16;
|
511 |
|
|
}
|
512 |
|
|
}
|
513 |
|
|
|
514 |
|
|
while (isxdigit(*cp) &&
|
515 |
|
|
(value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
|
516 |
|
|
result = result * base + value;
|
517 |
|
|
cp++;
|
518 |
|
|
}
|
519 |
|
|
|
520 |
|
|
if (endp)
|
521 |
|
|
*endp = cp;
|
522 |
|
|
|
523 |
|
|
return result;
|
524 |
|
|
}
|
525 |
|
|
|
526 |
|
|
unsigned long prom_memparse(const char *ptr, const char **retptr)
|
527 |
|
|
{
|
528 |
|
|
unsigned long ret = prom_strtoul(ptr, retptr);
|
529 |
|
|
int shift = 0;
|
530 |
|
|
|
531 |
|
|
/*
|
532 |
|
|
* We can't use a switch here because GCC *may* generate a
|
533 |
|
|
* jump table which won't work, because we're not running at
|
534 |
|
|
* the address we're linked at.
|
535 |
|
|
*/
|
536 |
|
|
if ('G' == **retptr || 'g' == **retptr)
|
537 |
|
|
shift = 30;
|
538 |
|
|
|
539 |
|
|
if ('M' == **retptr || 'm' == **retptr)
|
540 |
|
|
shift = 20;
|
541 |
|
|
|
542 |
|
|
if ('K' == **retptr || 'k' == **retptr)
|
543 |
|
|
shift = 10;
|
544 |
|
|
|
545 |
|
|
if (shift) {
|
546 |
|
|
ret <<= shift;
|
547 |
|
|
(*retptr)++;
|
548 |
|
|
}
|
549 |
|
|
|
550 |
|
|
return ret;
|
551 |
|
|
}
|
552 |
|
|
|
553 |
|
|
/*
|
554 |
|
|
* Early parsing of the command line passed to the kernel, used for
|
555 |
|
|
* "mem=x" and the options that affect the iommu
|
556 |
|
|
*/
|
557 |
|
|
static void __init early_cmdline_parse(void)
|
558 |
|
|
{
|
559 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
560 |
|
|
#ifdef CONFIG_PPC64
|
561 |
|
|
const char *opt;
|
562 |
|
|
#endif
|
563 |
|
|
char *p;
|
564 |
|
|
int l = 0;
|
565 |
|
|
|
566 |
|
|
RELOC(prom_cmd_line[0]) = 0;
|
567 |
|
|
p = RELOC(prom_cmd_line);
|
568 |
|
|
if ((long)_prom->chosen > 0)
|
569 |
|
|
l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
|
570 |
|
|
#ifdef CONFIG_CMDLINE
|
571 |
|
|
if (l <= 0 || p[0] == '\0') /* dbl check */
|
572 |
|
|
strlcpy(RELOC(prom_cmd_line),
|
573 |
|
|
RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
|
574 |
|
|
#endif /* CONFIG_CMDLINE */
|
575 |
|
|
prom_printf("command line: %s\n", RELOC(prom_cmd_line));
|
576 |
|
|
|
577 |
|
|
#ifdef CONFIG_PPC64
|
578 |
|
|
opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
|
579 |
|
|
if (opt) {
|
580 |
|
|
prom_printf("iommu opt is: %s\n", opt);
|
581 |
|
|
opt += 6;
|
582 |
|
|
while (*opt && *opt == ' ')
|
583 |
|
|
opt++;
|
584 |
|
|
if (!strncmp(opt, RELOC("off"), 3))
|
585 |
|
|
RELOC(prom_iommu_off) = 1;
|
586 |
|
|
else if (!strncmp(opt, RELOC("force"), 5))
|
587 |
|
|
RELOC(prom_iommu_force_on) = 1;
|
588 |
|
|
}
|
589 |
|
|
#endif
|
590 |
|
|
}
|
591 |
|
|
|
592 |
|
|
#ifdef CONFIG_PPC_PSERIES
|
593 |
|
|
/*
|
594 |
|
|
* There are two methods for telling firmware what our capabilities are.
|
595 |
|
|
* Newer machines have an "ibm,client-architecture-support" method on the
|
596 |
|
|
* root node. For older machines, we have to call the "process-elf-header"
|
597 |
|
|
* method in the /packages/elf-loader node, passing it a fake 32-bit
|
598 |
|
|
* ELF header containing a couple of PT_NOTE sections that contain
|
599 |
|
|
* structures that contain various information.
|
600 |
|
|
*/
|
601 |
|
|
|
602 |
|
|
/*
|
603 |
|
|
* New method - extensible architecture description vector.
|
604 |
|
|
*
|
605 |
|
|
* Because the description vector contains a mix of byte and word
|
606 |
|
|
* values, we declare it as an unsigned char array, and use this
|
607 |
|
|
* macro to put word values in.
|
608 |
|
|
*/
|
609 |
|
|
#define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
|
610 |
|
|
((x) >> 8) & 0xff, (x) & 0xff
|
611 |
|
|
|
612 |
|
|
/* Option vector bits - generic bits in byte 1 */
|
613 |
|
|
#define OV_IGNORE 0x80 /* ignore this vector */
|
614 |
|
|
#define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
|
615 |
|
|
|
616 |
|
|
/* Option vector 1: processor architectures supported */
|
617 |
|
|
#define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
|
618 |
|
|
#define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
|
619 |
|
|
#define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
|
620 |
|
|
#define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
|
621 |
|
|
#define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
|
622 |
|
|
#define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
|
623 |
|
|
|
624 |
|
|
/* Option vector 2: Open Firmware options supported */
|
625 |
|
|
#define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
|
626 |
|
|
|
627 |
|
|
/* Option vector 3: processor options supported */
|
628 |
|
|
#define OV3_FP 0x80 /* floating point */
|
629 |
|
|
#define OV3_VMX 0x40 /* VMX/Altivec */
|
630 |
|
|
#define OV3_DFP 0x20 /* decimal FP */
|
631 |
|
|
|
632 |
|
|
/* Option vector 5: PAPR/OF options supported */
|
633 |
|
|
#define OV5_LPAR 0x80 /* logical partitioning supported */
|
634 |
|
|
#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
|
635 |
|
|
/* ibm,dynamic-reconfiguration-memory property supported */
|
636 |
|
|
#define OV5_DRCONF_MEMORY 0x20
|
637 |
|
|
#define OV5_LARGE_PAGES 0x10 /* large pages supported */
|
638 |
|
|
#define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
|
639 |
|
|
/* PCIe/MSI support. Without MSI full PCIe is not supported */
|
640 |
|
|
#ifdef CONFIG_PCI_MSI
|
641 |
|
|
#define OV5_MSI 0x01 /* PCIe/MSI support */
|
642 |
|
|
#else
|
643 |
|
|
#define OV5_MSI 0x00
|
644 |
|
|
#endif /* CONFIG_PCI_MSI */
|
645 |
|
|
|
646 |
|
|
/*
|
647 |
|
|
* The architecture vector has an array of PVR mask/value pairs,
|
648 |
|
|
* followed by # option vectors - 1, followed by the option vectors.
|
649 |
|
|
*/
|
650 |
|
|
static unsigned char ibm_architecture_vec[] = {
|
651 |
|
|
W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
|
652 |
|
|
W(0xffff0000), W(0x003e0000), /* POWER6 */
|
653 |
|
|
W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
|
654 |
|
|
W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
|
655 |
|
|
5 - 1, /* 5 option vectors */
|
656 |
|
|
|
657 |
|
|
/* option vector 1: processor architectures supported */
|
658 |
|
|
3 - 2, /* length */
|
659 |
|
|
0, /* don't ignore, don't halt */
|
660 |
|
|
OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
|
661 |
|
|
OV1_PPC_2_04 | OV1_PPC_2_05,
|
662 |
|
|
|
663 |
|
|
/* option vector 2: Open Firmware options supported */
|
664 |
|
|
34 - 2, /* length */
|
665 |
|
|
OV2_REAL_MODE,
|
666 |
|
|
0, 0,
|
667 |
|
|
W(0xffffffff), /* real_base */
|
668 |
|
|
W(0xffffffff), /* real_size */
|
669 |
|
|
W(0xffffffff), /* virt_base */
|
670 |
|
|
W(0xffffffff), /* virt_size */
|
671 |
|
|
W(0xffffffff), /* load_base */
|
672 |
|
|
W(64), /* 128MB min RMA */
|
673 |
|
|
W(0xffffffff), /* full client load */
|
674 |
|
|
0, /* min RMA percentage of total RAM */
|
675 |
|
|
48, /* max log_2(hash table size) */
|
676 |
|
|
|
677 |
|
|
/* option vector 3: processor options supported */
|
678 |
|
|
3 - 2, /* length */
|
679 |
|
|
0, /* don't ignore, don't halt */
|
680 |
|
|
OV3_FP | OV3_VMX | OV3_DFP,
|
681 |
|
|
|
682 |
|
|
/* option vector 4: IBM PAPR implementation */
|
683 |
|
|
2 - 2, /* length */
|
684 |
|
|
0, /* don't halt */
|
685 |
|
|
|
686 |
|
|
/* option vector 5: PAPR/OF options */
|
687 |
|
|
3 - 2, /* length */
|
688 |
|
|
0, /* don't ignore, don't halt */
|
689 |
|
|
OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
|
690 |
|
|
OV5_DONATE_DEDICATE_CPU | OV5_MSI,
|
691 |
|
|
};
|
692 |
|
|
|
693 |
|
|
/* Old method - ELF header with PT_NOTE sections */
|
694 |
|
|
static struct fake_elf {
|
695 |
|
|
Elf32_Ehdr elfhdr;
|
696 |
|
|
Elf32_Phdr phdr[2];
|
697 |
|
|
struct chrpnote {
|
698 |
|
|
u32 namesz;
|
699 |
|
|
u32 descsz;
|
700 |
|
|
u32 type;
|
701 |
|
|
char name[8]; /* "PowerPC" */
|
702 |
|
|
struct chrpdesc {
|
703 |
|
|
u32 real_mode;
|
704 |
|
|
u32 real_base;
|
705 |
|
|
u32 real_size;
|
706 |
|
|
u32 virt_base;
|
707 |
|
|
u32 virt_size;
|
708 |
|
|
u32 load_base;
|
709 |
|
|
} chrpdesc;
|
710 |
|
|
} chrpnote;
|
711 |
|
|
struct rpanote {
|
712 |
|
|
u32 namesz;
|
713 |
|
|
u32 descsz;
|
714 |
|
|
u32 type;
|
715 |
|
|
char name[24]; /* "IBM,RPA-Client-Config" */
|
716 |
|
|
struct rpadesc {
|
717 |
|
|
u32 lpar_affinity;
|
718 |
|
|
u32 min_rmo_size;
|
719 |
|
|
u32 min_rmo_percent;
|
720 |
|
|
u32 max_pft_size;
|
721 |
|
|
u32 splpar;
|
722 |
|
|
u32 min_load;
|
723 |
|
|
u32 new_mem_def;
|
724 |
|
|
u32 ignore_me;
|
725 |
|
|
} rpadesc;
|
726 |
|
|
} rpanote;
|
727 |
|
|
} fake_elf = {
|
728 |
|
|
.elfhdr = {
|
729 |
|
|
.e_ident = { 0x7f, 'E', 'L', 'F',
|
730 |
|
|
ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
|
731 |
|
|
.e_type = ET_EXEC, /* yeah right */
|
732 |
|
|
.e_machine = EM_PPC,
|
733 |
|
|
.e_version = EV_CURRENT,
|
734 |
|
|
.e_phoff = offsetof(struct fake_elf, phdr),
|
735 |
|
|
.e_phentsize = sizeof(Elf32_Phdr),
|
736 |
|
|
.e_phnum = 2
|
737 |
|
|
},
|
738 |
|
|
.phdr = {
|
739 |
|
|
[0] = {
|
740 |
|
|
.p_type = PT_NOTE,
|
741 |
|
|
.p_offset = offsetof(struct fake_elf, chrpnote),
|
742 |
|
|
.p_filesz = sizeof(struct chrpnote)
|
743 |
|
|
}, [1] = {
|
744 |
|
|
.p_type = PT_NOTE,
|
745 |
|
|
.p_offset = offsetof(struct fake_elf, rpanote),
|
746 |
|
|
.p_filesz = sizeof(struct rpanote)
|
747 |
|
|
}
|
748 |
|
|
},
|
749 |
|
|
.chrpnote = {
|
750 |
|
|
.namesz = sizeof("PowerPC"),
|
751 |
|
|
.descsz = sizeof(struct chrpdesc),
|
752 |
|
|
.type = 0x1275,
|
753 |
|
|
.name = "PowerPC",
|
754 |
|
|
.chrpdesc = {
|
755 |
|
|
.real_mode = ~0U, /* ~0 means "don't care" */
|
756 |
|
|
.real_base = ~0U,
|
757 |
|
|
.real_size = ~0U,
|
758 |
|
|
.virt_base = ~0U,
|
759 |
|
|
.virt_size = ~0U,
|
760 |
|
|
.load_base = ~0U
|
761 |
|
|
},
|
762 |
|
|
},
|
763 |
|
|
.rpanote = {
|
764 |
|
|
.namesz = sizeof("IBM,RPA-Client-Config"),
|
765 |
|
|
.descsz = sizeof(struct rpadesc),
|
766 |
|
|
.type = 0x12759999,
|
767 |
|
|
.name = "IBM,RPA-Client-Config",
|
768 |
|
|
.rpadesc = {
|
769 |
|
|
.lpar_affinity = 0,
|
770 |
|
|
.min_rmo_size = 64, /* in megabytes */
|
771 |
|
|
.min_rmo_percent = 0,
|
772 |
|
|
.max_pft_size = 48, /* 2^48 bytes max PFT size */
|
773 |
|
|
.splpar = 1,
|
774 |
|
|
.min_load = ~0U,
|
775 |
|
|
.new_mem_def = 0
|
776 |
|
|
}
|
777 |
|
|
}
|
778 |
|
|
};
|
779 |
|
|
|
780 |
|
|
static void __init prom_send_capabilities(void)
|
781 |
|
|
{
|
782 |
|
|
ihandle elfloader, root;
|
783 |
|
|
prom_arg_t ret;
|
784 |
|
|
|
785 |
|
|
root = call_prom("open", 1, 1, ADDR("/"));
|
786 |
|
|
if (root != 0) {
|
787 |
|
|
/* try calling the ibm,client-architecture-support method */
|
788 |
|
|
if (call_prom_ret("call-method", 3, 2, &ret,
|
789 |
|
|
ADDR("ibm,client-architecture-support"),
|
790 |
|
|
root,
|
791 |
|
|
ADDR(ibm_architecture_vec)) == 0) {
|
792 |
|
|
/* the call exists... */
|
793 |
|
|
if (ret)
|
794 |
|
|
prom_printf("WARNING: ibm,client-architecture"
|
795 |
|
|
"-support call FAILED!\n");
|
796 |
|
|
call_prom("close", 1, 0, root);
|
797 |
|
|
return;
|
798 |
|
|
}
|
799 |
|
|
call_prom("close", 1, 0, root);
|
800 |
|
|
}
|
801 |
|
|
|
802 |
|
|
/* no ibm,client-architecture-support call, try the old way */
|
803 |
|
|
elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
|
804 |
|
|
if (elfloader == 0) {
|
805 |
|
|
prom_printf("couldn't open /packages/elf-loader\n");
|
806 |
|
|
return;
|
807 |
|
|
}
|
808 |
|
|
call_prom("call-method", 3, 1, ADDR("process-elf-header"),
|
809 |
|
|
elfloader, ADDR(&fake_elf));
|
810 |
|
|
call_prom("close", 1, 0, elfloader);
|
811 |
|
|
}
|
812 |
|
|
#endif
|
813 |
|
|
|
814 |
|
|
/*
|
815 |
|
|
* Memory allocation strategy... our layout is normally:
|
816 |
|
|
*
|
817 |
|
|
* at 14Mb or more we have vmlinux, then a gap and initrd. In some
|
818 |
|
|
* rare cases, initrd might end up being before the kernel though.
|
819 |
|
|
* We assume this won't override the final kernel at 0, we have no
|
820 |
|
|
* provision to handle that in this version, but it should hopefully
|
821 |
|
|
* never happen.
|
822 |
|
|
*
|
823 |
|
|
* alloc_top is set to the top of RMO, eventually shrink down if the
|
824 |
|
|
* TCEs overlap
|
825 |
|
|
*
|
826 |
|
|
* alloc_bottom is set to the top of kernel/initrd
|
827 |
|
|
*
|
828 |
|
|
* from there, allocations are done this way : rtas is allocated
|
829 |
|
|
* topmost, and the device-tree is allocated from the bottom. We try
|
830 |
|
|
* to grow the device-tree allocation as we progress. If we can't,
|
831 |
|
|
* then we fail, we don't currently have a facility to restart
|
832 |
|
|
* elsewhere, but that shouldn't be necessary.
|
833 |
|
|
*
|
834 |
|
|
* Note that calls to reserve_mem have to be done explicitly, memory
|
835 |
|
|
* allocated with either alloc_up or alloc_down isn't automatically
|
836 |
|
|
* reserved.
|
837 |
|
|
*/
|
838 |
|
|
|
839 |
|
|
|
840 |
|
|
/*
|
841 |
|
|
* Allocates memory in the RMO upward from the kernel/initrd
|
842 |
|
|
*
|
843 |
|
|
* When align is 0, this is a special case, it means to allocate in place
|
844 |
|
|
* at the current location of alloc_bottom or fail (that is basically
|
845 |
|
|
* extending the previous allocation). Used for the device-tree flattening
|
846 |
|
|
*/
|
847 |
|
|
static unsigned long __init alloc_up(unsigned long size, unsigned long align)
|
848 |
|
|
{
|
849 |
|
|
unsigned long base = RELOC(alloc_bottom);
|
850 |
|
|
unsigned long addr = 0;
|
851 |
|
|
|
852 |
|
|
if (align)
|
853 |
|
|
base = _ALIGN_UP(base, align);
|
854 |
|
|
prom_debug("alloc_up(%x, %x)\n", size, align);
|
855 |
|
|
if (RELOC(ram_top) == 0)
|
856 |
|
|
prom_panic("alloc_up() called with mem not initialized\n");
|
857 |
|
|
|
858 |
|
|
if (align)
|
859 |
|
|
base = _ALIGN_UP(RELOC(alloc_bottom), align);
|
860 |
|
|
else
|
861 |
|
|
base = RELOC(alloc_bottom);
|
862 |
|
|
|
863 |
|
|
for(; (base + size) <= RELOC(alloc_top);
|
864 |
|
|
base = _ALIGN_UP(base + 0x100000, align)) {
|
865 |
|
|
prom_debug(" trying: 0x%x\n\r", base);
|
866 |
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
867 |
|
|
if (addr != PROM_ERROR && addr != 0)
|
868 |
|
|
break;
|
869 |
|
|
addr = 0;
|
870 |
|
|
if (align == 0)
|
871 |
|
|
break;
|
872 |
|
|
}
|
873 |
|
|
if (addr == 0)
|
874 |
|
|
return 0;
|
875 |
|
|
RELOC(alloc_bottom) = addr;
|
876 |
|
|
|
877 |
|
|
prom_debug(" -> %x\n", addr);
|
878 |
|
|
prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
|
879 |
|
|
prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
|
880 |
|
|
prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
|
881 |
|
|
prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
|
882 |
|
|
prom_debug(" ram_top : %x\n", RELOC(ram_top));
|
883 |
|
|
|
884 |
|
|
return addr;
|
885 |
|
|
}
|
886 |
|
|
|
887 |
|
|
/*
|
888 |
|
|
* Allocates memory downward, either from top of RMO, or if highmem
|
889 |
|
|
* is set, from the top of RAM. Note that this one doesn't handle
|
890 |
|
|
* failures. It does claim memory if highmem is not set.
|
891 |
|
|
*/
|
892 |
|
|
static unsigned long __init alloc_down(unsigned long size, unsigned long align,
|
893 |
|
|
int highmem)
|
894 |
|
|
{
|
895 |
|
|
unsigned long base, addr = 0;
|
896 |
|
|
|
897 |
|
|
prom_debug("alloc_down(%x, %x, %s)\n", size, align,
|
898 |
|
|
highmem ? RELOC("(high)") : RELOC("(low)"));
|
899 |
|
|
if (RELOC(ram_top) == 0)
|
900 |
|
|
prom_panic("alloc_down() called with mem not initialized\n");
|
901 |
|
|
|
902 |
|
|
if (highmem) {
|
903 |
|
|
/* Carve out storage for the TCE table. */
|
904 |
|
|
addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
|
905 |
|
|
if (addr <= RELOC(alloc_bottom))
|
906 |
|
|
return 0;
|
907 |
|
|
/* Will we bump into the RMO ? If yes, check out that we
|
908 |
|
|
* didn't overlap existing allocations there, if we did,
|
909 |
|
|
* we are dead, we must be the first in town !
|
910 |
|
|
*/
|
911 |
|
|
if (addr < RELOC(rmo_top)) {
|
912 |
|
|
/* Good, we are first */
|
913 |
|
|
if (RELOC(alloc_top) == RELOC(rmo_top))
|
914 |
|
|
RELOC(alloc_top) = RELOC(rmo_top) = addr;
|
915 |
|
|
else
|
916 |
|
|
return 0;
|
917 |
|
|
}
|
918 |
|
|
RELOC(alloc_top_high) = addr;
|
919 |
|
|
goto bail;
|
920 |
|
|
}
|
921 |
|
|
|
922 |
|
|
base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
|
923 |
|
|
for (; base > RELOC(alloc_bottom);
|
924 |
|
|
base = _ALIGN_DOWN(base - 0x100000, align)) {
|
925 |
|
|
prom_debug(" trying: 0x%x\n\r", base);
|
926 |
|
|
addr = (unsigned long)prom_claim(base, size, 0);
|
927 |
|
|
if (addr != PROM_ERROR && addr != 0)
|
928 |
|
|
break;
|
929 |
|
|
addr = 0;
|
930 |
|
|
}
|
931 |
|
|
if (addr == 0)
|
932 |
|
|
return 0;
|
933 |
|
|
RELOC(alloc_top) = addr;
|
934 |
|
|
|
935 |
|
|
bail:
|
936 |
|
|
prom_debug(" -> %x\n", addr);
|
937 |
|
|
prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
|
938 |
|
|
prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
|
939 |
|
|
prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
|
940 |
|
|
prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
|
941 |
|
|
prom_debug(" ram_top : %x\n", RELOC(ram_top));
|
942 |
|
|
|
943 |
|
|
return addr;
|
944 |
|
|
}
|
945 |
|
|
|
946 |
|
|
/*
|
947 |
|
|
* Parse a "reg" cell
|
948 |
|
|
*/
|
949 |
|
|
static unsigned long __init prom_next_cell(int s, cell_t **cellp)
|
950 |
|
|
{
|
951 |
|
|
cell_t *p = *cellp;
|
952 |
|
|
unsigned long r = 0;
|
953 |
|
|
|
954 |
|
|
/* Ignore more than 2 cells */
|
955 |
|
|
while (s > sizeof(unsigned long) / 4) {
|
956 |
|
|
p++;
|
957 |
|
|
s--;
|
958 |
|
|
}
|
959 |
|
|
r = *p++;
|
960 |
|
|
#ifdef CONFIG_PPC64
|
961 |
|
|
if (s > 1) {
|
962 |
|
|
r <<= 32;
|
963 |
|
|
r |= *(p++);
|
964 |
|
|
}
|
965 |
|
|
#endif
|
966 |
|
|
*cellp = p;
|
967 |
|
|
return r;
|
968 |
|
|
}
|
969 |
|
|
|
970 |
|
|
/*
|
971 |
|
|
* Very dumb function for adding to the memory reserve list, but
|
972 |
|
|
* we don't need anything smarter at this point
|
973 |
|
|
*
|
974 |
|
|
* XXX Eventually check for collisions. They should NEVER happen.
|
975 |
|
|
* If problems seem to show up, it would be a good start to track
|
976 |
|
|
* them down.
|
977 |
|
|
*/
|
978 |
|
|
static void __init reserve_mem(u64 base, u64 size)
|
979 |
|
|
{
|
980 |
|
|
u64 top = base + size;
|
981 |
|
|
unsigned long cnt = RELOC(mem_reserve_cnt);
|
982 |
|
|
|
983 |
|
|
if (size == 0)
|
984 |
|
|
return;
|
985 |
|
|
|
986 |
|
|
/* We need to always keep one empty entry so that we
|
987 |
|
|
* have our terminator with "size" set to 0 since we are
|
988 |
|
|
* dumb and just copy this entire array to the boot params
|
989 |
|
|
*/
|
990 |
|
|
base = _ALIGN_DOWN(base, PAGE_SIZE);
|
991 |
|
|
top = _ALIGN_UP(top, PAGE_SIZE);
|
992 |
|
|
size = top - base;
|
993 |
|
|
|
994 |
|
|
if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
|
995 |
|
|
prom_panic("Memory reserve map exhausted !\n");
|
996 |
|
|
RELOC(mem_reserve_map)[cnt].base = base;
|
997 |
|
|
RELOC(mem_reserve_map)[cnt].size = size;
|
998 |
|
|
RELOC(mem_reserve_cnt) = cnt + 1;
|
999 |
|
|
}
|
1000 |
|
|
|
1001 |
|
|
/*
|
1002 |
|
|
* Initialize memory allocation mechanism, parse "memory" nodes and
|
1003 |
|
|
* obtain that way the top of memory and RMO to setup out local allocator
|
1004 |
|
|
*/
|
1005 |
|
|
static void __init prom_init_mem(void)
|
1006 |
|
|
{
|
1007 |
|
|
phandle node;
|
1008 |
|
|
char *path, type[64];
|
1009 |
|
|
unsigned int plen;
|
1010 |
|
|
cell_t *p, *endp;
|
1011 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1012 |
|
|
u32 rac, rsc;
|
1013 |
|
|
|
1014 |
|
|
/*
|
1015 |
|
|
* We iterate the memory nodes to find
|
1016 |
|
|
* 1) top of RMO (first node)
|
1017 |
|
|
* 2) top of memory
|
1018 |
|
|
*/
|
1019 |
|
|
rac = 2;
|
1020 |
|
|
prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac));
|
1021 |
|
|
rsc = 1;
|
1022 |
|
|
prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc));
|
1023 |
|
|
prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
|
1024 |
|
|
prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
|
1025 |
|
|
|
1026 |
|
|
prom_debug("scanning memory:\n");
|
1027 |
|
|
path = RELOC(prom_scratch);
|
1028 |
|
|
|
1029 |
|
|
for (node = 0; prom_next_node(&node); ) {
|
1030 |
|
|
type[0] = 0;
|
1031 |
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
1032 |
|
|
|
1033 |
|
|
if (type[0] == 0) {
|
1034 |
|
|
/*
|
1035 |
|
|
* CHRP Longtrail machines have no device_type
|
1036 |
|
|
* on the memory node, so check the name instead...
|
1037 |
|
|
*/
|
1038 |
|
|
prom_getprop(node, "name", type, sizeof(type));
|
1039 |
|
|
}
|
1040 |
|
|
if (strcmp(type, RELOC("memory")))
|
1041 |
|
|
continue;
|
1042 |
|
|
|
1043 |
|
|
plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
|
1044 |
|
|
if (plen > sizeof(regbuf)) {
|
1045 |
|
|
prom_printf("memory node too large for buffer !\n");
|
1046 |
|
|
plen = sizeof(regbuf);
|
1047 |
|
|
}
|
1048 |
|
|
p = RELOC(regbuf);
|
1049 |
|
|
endp = p + (plen / sizeof(cell_t));
|
1050 |
|
|
|
1051 |
|
|
#ifdef DEBUG_PROM
|
1052 |
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
1053 |
|
|
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
1054 |
|
|
prom_debug(" node %s :\n", path);
|
1055 |
|
|
#endif /* DEBUG_PROM */
|
1056 |
|
|
|
1057 |
|
|
while ((endp - p) >= (rac + rsc)) {
|
1058 |
|
|
unsigned long base, size;
|
1059 |
|
|
|
1060 |
|
|
base = prom_next_cell(rac, &p);
|
1061 |
|
|
size = prom_next_cell(rsc, &p);
|
1062 |
|
|
|
1063 |
|
|
if (size == 0)
|
1064 |
|
|
continue;
|
1065 |
|
|
prom_debug(" %x %x\n", base, size);
|
1066 |
|
|
if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR))
|
1067 |
|
|
RELOC(rmo_top) = size;
|
1068 |
|
|
if ((base + size) > RELOC(ram_top))
|
1069 |
|
|
RELOC(ram_top) = base + size;
|
1070 |
|
|
}
|
1071 |
|
|
}
|
1072 |
|
|
|
1073 |
|
|
RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
|
1074 |
|
|
|
1075 |
|
|
/* Check if we have an initrd after the kernel, if we do move our bottom
|
1076 |
|
|
* point to after it
|
1077 |
|
|
*/
|
1078 |
|
|
if (RELOC(prom_initrd_start)) {
|
1079 |
|
|
if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
|
1080 |
|
|
RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
|
1081 |
|
|
}
|
1082 |
|
|
|
1083 |
|
|
/*
|
1084 |
|
|
* Setup our top alloc point, that is top of RMO or top of
|
1085 |
|
|
* segment 0 when running non-LPAR.
|
1086 |
|
|
* Some RS64 machines have buggy firmware where claims up at
|
1087 |
|
|
* 1GB fail. Cap at 768MB as a workaround.
|
1088 |
|
|
* Since 768MB is plenty of room, and we need to cap to something
|
1089 |
|
|
* reasonable on 32-bit, cap at 768MB on all machines.
|
1090 |
|
|
*/
|
1091 |
|
|
if (!RELOC(rmo_top))
|
1092 |
|
|
RELOC(rmo_top) = RELOC(ram_top);
|
1093 |
|
|
RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
|
1094 |
|
|
RELOC(alloc_top) = RELOC(rmo_top);
|
1095 |
|
|
RELOC(alloc_top_high) = RELOC(ram_top);
|
1096 |
|
|
|
1097 |
|
|
prom_printf("memory layout at init:\n");
|
1098 |
|
|
prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
|
1099 |
|
|
prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
|
1100 |
|
|
prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
|
1101 |
|
|
prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
|
1102 |
|
|
prom_printf(" ram_top : %x\n", RELOC(ram_top));
|
1103 |
|
|
}
|
1104 |
|
|
|
1105 |
|
|
|
1106 |
|
|
/*
|
1107 |
|
|
* Allocate room for and instantiate RTAS
|
1108 |
|
|
*/
|
1109 |
|
|
static void __init prom_instantiate_rtas(void)
|
1110 |
|
|
{
|
1111 |
|
|
phandle rtas_node;
|
1112 |
|
|
ihandle rtas_inst;
|
1113 |
|
|
u32 base, entry = 0;
|
1114 |
|
|
u32 size = 0;
|
1115 |
|
|
|
1116 |
|
|
prom_debug("prom_instantiate_rtas: start...\n");
|
1117 |
|
|
|
1118 |
|
|
rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
1119 |
|
|
prom_debug("rtas_node: %x\n", rtas_node);
|
1120 |
|
|
if (!PHANDLE_VALID(rtas_node))
|
1121 |
|
|
return;
|
1122 |
|
|
|
1123 |
|
|
prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
|
1124 |
|
|
if (size == 0)
|
1125 |
|
|
return;
|
1126 |
|
|
|
1127 |
|
|
base = alloc_down(size, PAGE_SIZE, 0);
|
1128 |
|
|
if (base == 0) {
|
1129 |
|
|
prom_printf("RTAS allocation failed !\n");
|
1130 |
|
|
return;
|
1131 |
|
|
}
|
1132 |
|
|
|
1133 |
|
|
rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
|
1134 |
|
|
if (!IHANDLE_VALID(rtas_inst)) {
|
1135 |
|
|
prom_printf("opening rtas package failed (%x)\n", rtas_inst);
|
1136 |
|
|
return;
|
1137 |
|
|
}
|
1138 |
|
|
|
1139 |
|
|
prom_printf("instantiating rtas at 0x%x ...", base);
|
1140 |
|
|
|
1141 |
|
|
if (call_prom_ret("call-method", 3, 2, &entry,
|
1142 |
|
|
ADDR("instantiate-rtas"),
|
1143 |
|
|
rtas_inst, base) != 0
|
1144 |
|
|
|| entry == 0) {
|
1145 |
|
|
prom_printf(" failed\n");
|
1146 |
|
|
return;
|
1147 |
|
|
}
|
1148 |
|
|
prom_printf(" done\n");
|
1149 |
|
|
|
1150 |
|
|
reserve_mem(base, size);
|
1151 |
|
|
|
1152 |
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
|
1153 |
|
|
&base, sizeof(base));
|
1154 |
|
|
prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
|
1155 |
|
|
&entry, sizeof(entry));
|
1156 |
|
|
|
1157 |
|
|
prom_debug("rtas base = 0x%x\n", base);
|
1158 |
|
|
prom_debug("rtas entry = 0x%x\n", entry);
|
1159 |
|
|
prom_debug("rtas size = 0x%x\n", (long)size);
|
1160 |
|
|
|
1161 |
|
|
prom_debug("prom_instantiate_rtas: end...\n");
|
1162 |
|
|
}
|
1163 |
|
|
|
1164 |
|
|
#ifdef CONFIG_PPC64
|
1165 |
|
|
/*
|
1166 |
|
|
* Allocate room for and initialize TCE tables
|
1167 |
|
|
*/
|
1168 |
|
|
static void __init prom_initialize_tce_table(void)
|
1169 |
|
|
{
|
1170 |
|
|
phandle node;
|
1171 |
|
|
ihandle phb_node;
|
1172 |
|
|
char compatible[64], type[64], model[64];
|
1173 |
|
|
char *path = RELOC(prom_scratch);
|
1174 |
|
|
u64 base, align;
|
1175 |
|
|
u32 minalign, minsize;
|
1176 |
|
|
u64 tce_entry, *tce_entryp;
|
1177 |
|
|
u64 local_alloc_top, local_alloc_bottom;
|
1178 |
|
|
u64 i;
|
1179 |
|
|
|
1180 |
|
|
if (RELOC(prom_iommu_off))
|
1181 |
|
|
return;
|
1182 |
|
|
|
1183 |
|
|
prom_debug("starting prom_initialize_tce_table\n");
|
1184 |
|
|
|
1185 |
|
|
/* Cache current top of allocs so we reserve a single block */
|
1186 |
|
|
local_alloc_top = RELOC(alloc_top_high);
|
1187 |
|
|
local_alloc_bottom = local_alloc_top;
|
1188 |
|
|
|
1189 |
|
|
/* Search all nodes looking for PHBs. */
|
1190 |
|
|
for (node = 0; prom_next_node(&node); ) {
|
1191 |
|
|
compatible[0] = 0;
|
1192 |
|
|
type[0] = 0;
|
1193 |
|
|
model[0] = 0;
|
1194 |
|
|
prom_getprop(node, "compatible",
|
1195 |
|
|
compatible, sizeof(compatible));
|
1196 |
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
1197 |
|
|
prom_getprop(node, "model", model, sizeof(model));
|
1198 |
|
|
|
1199 |
|
|
if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
|
1200 |
|
|
continue;
|
1201 |
|
|
|
1202 |
|
|
/* Keep the old logic intact to avoid regression. */
|
1203 |
|
|
if (compatible[0] != 0) {
|
1204 |
|
|
if ((strstr(compatible, RELOC("python")) == NULL) &&
|
1205 |
|
|
(strstr(compatible, RELOC("Speedwagon")) == NULL) &&
|
1206 |
|
|
(strstr(compatible, RELOC("Winnipeg")) == NULL))
|
1207 |
|
|
continue;
|
1208 |
|
|
} else if (model[0] != 0) {
|
1209 |
|
|
if ((strstr(model, RELOC("ython")) == NULL) &&
|
1210 |
|
|
(strstr(model, RELOC("peedwagon")) == NULL) &&
|
1211 |
|
|
(strstr(model, RELOC("innipeg")) == NULL))
|
1212 |
|
|
continue;
|
1213 |
|
|
}
|
1214 |
|
|
|
1215 |
|
|
if (prom_getprop(node, "tce-table-minalign", &minalign,
|
1216 |
|
|
sizeof(minalign)) == PROM_ERROR)
|
1217 |
|
|
minalign = 0;
|
1218 |
|
|
if (prom_getprop(node, "tce-table-minsize", &minsize,
|
1219 |
|
|
sizeof(minsize)) == PROM_ERROR)
|
1220 |
|
|
minsize = 4UL << 20;
|
1221 |
|
|
|
1222 |
|
|
/*
|
1223 |
|
|
* Even though we read what OF wants, we just set the table
|
1224 |
|
|
* size to 4 MB. This is enough to map 2GB of PCI DMA space.
|
1225 |
|
|
* By doing this, we avoid the pitfalls of trying to DMA to
|
1226 |
|
|
* MMIO space and the DMA alias hole.
|
1227 |
|
|
*
|
1228 |
|
|
* On POWER4, firmware sets the TCE region by assuming
|
1229 |
|
|
* each TCE table is 8MB. Using this memory for anything
|
1230 |
|
|
* else will impact performance, so we always allocate 8MB.
|
1231 |
|
|
* Anton
|
1232 |
|
|
*/
|
1233 |
|
|
if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
|
1234 |
|
|
minsize = 8UL << 20;
|
1235 |
|
|
else
|
1236 |
|
|
minsize = 4UL << 20;
|
1237 |
|
|
|
1238 |
|
|
/* Align to the greater of the align or size */
|
1239 |
|
|
align = max(minalign, minsize);
|
1240 |
|
|
base = alloc_down(minsize, align, 1);
|
1241 |
|
|
if (base == 0)
|
1242 |
|
|
prom_panic("ERROR, cannot find space for TCE table.\n");
|
1243 |
|
|
if (base < local_alloc_bottom)
|
1244 |
|
|
local_alloc_bottom = base;
|
1245 |
|
|
|
1246 |
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
1247 |
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
1248 |
|
|
/* Call OF to setup the TCE hardware */
|
1249 |
|
|
if (call_prom("package-to-path", 3, 1, node,
|
1250 |
|
|
path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
|
1251 |
|
|
prom_printf("package-to-path failed\n");
|
1252 |
|
|
}
|
1253 |
|
|
|
1254 |
|
|
/* Save away the TCE table attributes for later use. */
|
1255 |
|
|
prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
|
1256 |
|
|
prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
|
1257 |
|
|
|
1258 |
|
|
prom_debug("TCE table: %s\n", path);
|
1259 |
|
|
prom_debug("\tnode = 0x%x\n", node);
|
1260 |
|
|
prom_debug("\tbase = 0x%x\n", base);
|
1261 |
|
|
prom_debug("\tsize = 0x%x\n", minsize);
|
1262 |
|
|
|
1263 |
|
|
/* Initialize the table to have a one-to-one mapping
|
1264 |
|
|
* over the allocated size.
|
1265 |
|
|
*/
|
1266 |
|
|
tce_entryp = (unsigned long *)base;
|
1267 |
|
|
for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
|
1268 |
|
|
tce_entry = (i << PAGE_SHIFT);
|
1269 |
|
|
tce_entry |= 0x3;
|
1270 |
|
|
*tce_entryp = tce_entry;
|
1271 |
|
|
}
|
1272 |
|
|
|
1273 |
|
|
prom_printf("opening PHB %s", path);
|
1274 |
|
|
phb_node = call_prom("open", 1, 1, path);
|
1275 |
|
|
if (phb_node == 0)
|
1276 |
|
|
prom_printf("... failed\n");
|
1277 |
|
|
else
|
1278 |
|
|
prom_printf("... done\n");
|
1279 |
|
|
|
1280 |
|
|
call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
|
1281 |
|
|
phb_node, -1, minsize,
|
1282 |
|
|
(u32) base, (u32) (base >> 32));
|
1283 |
|
|
call_prom("close", 1, 0, phb_node);
|
1284 |
|
|
}
|
1285 |
|
|
|
1286 |
|
|
reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
|
1287 |
|
|
|
1288 |
|
|
/* These are only really needed if there is a memory limit in
|
1289 |
|
|
* effect, but we don't know so export them always. */
|
1290 |
|
|
RELOC(prom_tce_alloc_start) = local_alloc_bottom;
|
1291 |
|
|
RELOC(prom_tce_alloc_end) = local_alloc_top;
|
1292 |
|
|
|
1293 |
|
|
/* Flag the first invalid entry */
|
1294 |
|
|
prom_debug("ending prom_initialize_tce_table\n");
|
1295 |
|
|
}
|
1296 |
|
|
#endif
|
1297 |
|
|
|
1298 |
|
|
/*
|
1299 |
|
|
* With CHRP SMP we need to use the OF to start the other processors.
|
1300 |
|
|
* We can't wait until smp_boot_cpus (the OF is trashed by then)
|
1301 |
|
|
* so we have to put the processors into a holding pattern controlled
|
1302 |
|
|
* by the kernel (not OF) before we destroy the OF.
|
1303 |
|
|
*
|
1304 |
|
|
* This uses a chunk of low memory, puts some holding pattern
|
1305 |
|
|
* code there and sends the other processors off to there until
|
1306 |
|
|
* smp_boot_cpus tells them to do something. The holding pattern
|
1307 |
|
|
* checks that address until its cpu # is there, when it is that
|
1308 |
|
|
* cpu jumps to __secondary_start(). smp_boot_cpus() takes care
|
1309 |
|
|
* of setting those values.
|
1310 |
|
|
*
|
1311 |
|
|
* We also use physical address 0x4 here to tell when a cpu
|
1312 |
|
|
* is in its holding pattern code.
|
1313 |
|
|
*
|
1314 |
|
|
* -- Cort
|
1315 |
|
|
*/
|
1316 |
|
|
extern void __secondary_hold(void);
|
1317 |
|
|
extern unsigned long __secondary_hold_spinloop;
|
1318 |
|
|
extern unsigned long __secondary_hold_acknowledge;
|
1319 |
|
|
|
1320 |
|
|
/*
|
1321 |
|
|
* We want to reference the copy of __secondary_hold_* in the
|
1322 |
|
|
* 0 - 0x100 address range
|
1323 |
|
|
*/
|
1324 |
|
|
#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
|
1325 |
|
|
|
1326 |
|
|
static void __init prom_hold_cpus(void)
|
1327 |
|
|
{
|
1328 |
|
|
unsigned long i;
|
1329 |
|
|
unsigned int reg;
|
1330 |
|
|
phandle node;
|
1331 |
|
|
char type[64];
|
1332 |
|
|
int cpuid = 0;
|
1333 |
|
|
unsigned int interrupt_server[MAX_CPU_THREADS];
|
1334 |
|
|
unsigned int cpu_threads, hw_cpu_num;
|
1335 |
|
|
int propsize;
|
1336 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1337 |
|
|
unsigned long *spinloop
|
1338 |
|
|
= (void *) LOW_ADDR(__secondary_hold_spinloop);
|
1339 |
|
|
unsigned long *acknowledge
|
1340 |
|
|
= (void *) LOW_ADDR(__secondary_hold_acknowledge);
|
1341 |
|
|
#ifdef CONFIG_PPC64
|
1342 |
|
|
/* __secondary_hold is actually a descriptor, not the text address */
|
1343 |
|
|
unsigned long secondary_hold
|
1344 |
|
|
= __pa(*PTRRELOC((unsigned long *)__secondary_hold));
|
1345 |
|
|
#else
|
1346 |
|
|
unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
|
1347 |
|
|
#endif
|
1348 |
|
|
|
1349 |
|
|
prom_debug("prom_hold_cpus: start...\n");
|
1350 |
|
|
prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
|
1351 |
|
|
prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
|
1352 |
|
|
prom_debug(" 1) acknowledge = 0x%x\n",
|
1353 |
|
|
(unsigned long)acknowledge);
|
1354 |
|
|
prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
|
1355 |
|
|
prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
|
1356 |
|
|
|
1357 |
|
|
/* Set the common spinloop variable, so all of the secondary cpus
|
1358 |
|
|
* will block when they are awakened from their OF spinloop.
|
1359 |
|
|
* This must occur for both SMP and non SMP kernels, since OF will
|
1360 |
|
|
* be trashed when we move the kernel.
|
1361 |
|
|
*/
|
1362 |
|
|
*spinloop = 0;
|
1363 |
|
|
|
1364 |
|
|
/* look for cpus */
|
1365 |
|
|
for (node = 0; prom_next_node(&node); ) {
|
1366 |
|
|
type[0] = 0;
|
1367 |
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
1368 |
|
|
if (strcmp(type, RELOC("cpu")) != 0)
|
1369 |
|
|
continue;
|
1370 |
|
|
|
1371 |
|
|
/* Skip non-configured cpus. */
|
1372 |
|
|
if (prom_getprop(node, "status", type, sizeof(type)) > 0)
|
1373 |
|
|
if (strcmp(type, RELOC("okay")) != 0)
|
1374 |
|
|
continue;
|
1375 |
|
|
|
1376 |
|
|
reg = -1;
|
1377 |
|
|
prom_getprop(node, "reg", ®, sizeof(reg));
|
1378 |
|
|
|
1379 |
|
|
prom_debug("\ncpuid = 0x%x\n", cpuid);
|
1380 |
|
|
prom_debug("cpu hw idx = 0x%x\n", reg);
|
1381 |
|
|
|
1382 |
|
|
/* Init the acknowledge var which will be reset by
|
1383 |
|
|
* the secondary cpu when it awakens from its OF
|
1384 |
|
|
* spinloop.
|
1385 |
|
|
*/
|
1386 |
|
|
*acknowledge = (unsigned long)-1;
|
1387 |
|
|
|
1388 |
|
|
propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s",
|
1389 |
|
|
&interrupt_server,
|
1390 |
|
|
sizeof(interrupt_server));
|
1391 |
|
|
if (propsize < 0) {
|
1392 |
|
|
/* no property. old hardware has no SMT */
|
1393 |
|
|
cpu_threads = 1;
|
1394 |
|
|
interrupt_server[0] = reg; /* fake it with phys id */
|
1395 |
|
|
} else {
|
1396 |
|
|
/* We have a threaded processor */
|
1397 |
|
|
cpu_threads = propsize / sizeof(u32);
|
1398 |
|
|
if (cpu_threads > MAX_CPU_THREADS) {
|
1399 |
|
|
prom_printf("SMT: too many threads!\n"
|
1400 |
|
|
"SMT: found %x, max is %x\n",
|
1401 |
|
|
cpu_threads, MAX_CPU_THREADS);
|
1402 |
|
|
cpu_threads = 1; /* ToDo: panic? */
|
1403 |
|
|
}
|
1404 |
|
|
}
|
1405 |
|
|
|
1406 |
|
|
hw_cpu_num = interrupt_server[0];
|
1407 |
|
|
if (hw_cpu_num != _prom->cpu) {
|
1408 |
|
|
/* Primary Thread of non-boot cpu */
|
1409 |
|
|
prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg);
|
1410 |
|
|
call_prom("start-cpu", 3, 0, node,
|
1411 |
|
|
secondary_hold, reg);
|
1412 |
|
|
|
1413 |
|
|
for (i = 0; (i < 100000000) &&
|
1414 |
|
|
(*acknowledge == ((unsigned long)-1)); i++ )
|
1415 |
|
|
mb();
|
1416 |
|
|
|
1417 |
|
|
if (*acknowledge == reg)
|
1418 |
|
|
prom_printf("done\n");
|
1419 |
|
|
else
|
1420 |
|
|
prom_printf("failed: %x\n", *acknowledge);
|
1421 |
|
|
}
|
1422 |
|
|
#ifdef CONFIG_SMP
|
1423 |
|
|
else
|
1424 |
|
|
prom_printf("%x : boot cpu %x\n", cpuid, reg);
|
1425 |
|
|
#endif /* CONFIG_SMP */
|
1426 |
|
|
|
1427 |
|
|
/* Reserve cpu #s for secondary threads. They start later. */
|
1428 |
|
|
cpuid += cpu_threads;
|
1429 |
|
|
}
|
1430 |
|
|
|
1431 |
|
|
if (cpuid > NR_CPUS)
|
1432 |
|
|
prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
|
1433 |
|
|
") exceeded: ignoring extras\n");
|
1434 |
|
|
|
1435 |
|
|
prom_debug("prom_hold_cpus: end...\n");
|
1436 |
|
|
}
|
1437 |
|
|
|
1438 |
|
|
|
1439 |
|
|
static void __init prom_init_client_services(unsigned long pp)
|
1440 |
|
|
{
|
1441 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1442 |
|
|
|
1443 |
|
|
/* Get a handle to the prom entry point before anything else */
|
1444 |
|
|
RELOC(prom_entry) = pp;
|
1445 |
|
|
|
1446 |
|
|
/* get a handle for the stdout device */
|
1447 |
|
|
_prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
|
1448 |
|
|
if (!PHANDLE_VALID(_prom->chosen))
|
1449 |
|
|
prom_panic("cannot find chosen"); /* msg won't be printed :( */
|
1450 |
|
|
|
1451 |
|
|
/* get device tree root */
|
1452 |
|
|
_prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
|
1453 |
|
|
if (!PHANDLE_VALID(_prom->root))
|
1454 |
|
|
prom_panic("cannot find device tree root"); /* msg won't be printed :( */
|
1455 |
|
|
|
1456 |
|
|
_prom->mmumap = 0;
|
1457 |
|
|
}
|
1458 |
|
|
|
1459 |
|
|
#ifdef CONFIG_PPC32
|
1460 |
|
|
/*
|
1461 |
|
|
* For really old powermacs, we need to map things we claim.
|
1462 |
|
|
* For that, we need the ihandle of the mmu.
|
1463 |
|
|
* Also, on the longtrail, we need to work around other bugs.
|
1464 |
|
|
*/
|
1465 |
|
|
static void __init prom_find_mmu(void)
|
1466 |
|
|
{
|
1467 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1468 |
|
|
phandle oprom;
|
1469 |
|
|
char version[64];
|
1470 |
|
|
|
1471 |
|
|
oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
|
1472 |
|
|
if (!PHANDLE_VALID(oprom))
|
1473 |
|
|
return;
|
1474 |
|
|
if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
|
1475 |
|
|
return;
|
1476 |
|
|
version[sizeof(version) - 1] = 0;
|
1477 |
|
|
/* XXX might need to add other versions here */
|
1478 |
|
|
if (strcmp(version, "Open Firmware, 1.0.5") == 0)
|
1479 |
|
|
of_workarounds = OF_WA_CLAIM;
|
1480 |
|
|
else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
|
1481 |
|
|
of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
|
1482 |
|
|
call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
|
1483 |
|
|
} else
|
1484 |
|
|
return;
|
1485 |
|
|
_prom->memory = call_prom("open", 1, 1, ADDR("/memory"));
|
1486 |
|
|
prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
|
1487 |
|
|
sizeof(_prom->mmumap));
|
1488 |
|
|
if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap))
|
1489 |
|
|
of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
|
1490 |
|
|
}
|
1491 |
|
|
#else
|
1492 |
|
|
#define prom_find_mmu()
|
1493 |
|
|
#endif
|
1494 |
|
|
|
1495 |
|
|
static void __init prom_init_stdout(void)
|
1496 |
|
|
{
|
1497 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1498 |
|
|
char *path = RELOC(of_stdout_device);
|
1499 |
|
|
char type[16];
|
1500 |
|
|
u32 val;
|
1501 |
|
|
|
1502 |
|
|
if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
|
1503 |
|
|
prom_panic("cannot find stdout");
|
1504 |
|
|
|
1505 |
|
|
_prom->stdout = val;
|
1506 |
|
|
|
1507 |
|
|
/* Get the full OF pathname of the stdout device */
|
1508 |
|
|
memset(path, 0, 256);
|
1509 |
|
|
call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
|
1510 |
|
|
val = call_prom("instance-to-package", 1, 1, _prom->stdout);
|
1511 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package",
|
1512 |
|
|
&val, sizeof(val));
|
1513 |
|
|
prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
|
1514 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path",
|
1515 |
|
|
path, strlen(path) + 1);
|
1516 |
|
|
|
1517 |
|
|
/* If it's a display, note it */
|
1518 |
|
|
memset(type, 0, sizeof(type));
|
1519 |
|
|
prom_getprop(val, "device_type", type, sizeof(type));
|
1520 |
|
|
if (strcmp(type, RELOC("display")) == 0)
|
1521 |
|
|
prom_setprop(val, path, "linux,boot-display", NULL, 0);
|
1522 |
|
|
}
|
1523 |
|
|
|
1524 |
|
|
static void __init prom_close_stdin(void)
|
1525 |
|
|
{
|
1526 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1527 |
|
|
ihandle val;
|
1528 |
|
|
|
1529 |
|
|
if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
|
1530 |
|
|
call_prom("close", 1, 0, val);
|
1531 |
|
|
}
|
1532 |
|
|
|
1533 |
|
|
static int __init prom_find_machine_type(void)
|
1534 |
|
|
{
|
1535 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1536 |
|
|
char compat[256];
|
1537 |
|
|
int len, i = 0;
|
1538 |
|
|
#ifdef CONFIG_PPC64
|
1539 |
|
|
phandle rtas;
|
1540 |
|
|
int x;
|
1541 |
|
|
#endif
|
1542 |
|
|
|
1543 |
|
|
/* Look for a PowerMac */
|
1544 |
|
|
len = prom_getprop(_prom->root, "compatible",
|
1545 |
|
|
compat, sizeof(compat)-1);
|
1546 |
|
|
if (len > 0) {
|
1547 |
|
|
compat[len] = 0;
|
1548 |
|
|
while (i < len) {
|
1549 |
|
|
char *p = &compat[i];
|
1550 |
|
|
int sl = strlen(p);
|
1551 |
|
|
if (sl == 0)
|
1552 |
|
|
break;
|
1553 |
|
|
if (strstr(p, RELOC("Power Macintosh")) ||
|
1554 |
|
|
strstr(p, RELOC("MacRISC")))
|
1555 |
|
|
return PLATFORM_POWERMAC;
|
1556 |
|
|
#ifdef CONFIG_PPC64
|
1557 |
|
|
/* We must make sure we don't detect the IBM Cell
|
1558 |
|
|
* blades as pSeries due to some firmware issues,
|
1559 |
|
|
* so we do it here.
|
1560 |
|
|
*/
|
1561 |
|
|
if (strstr(p, RELOC("IBM,CBEA")) ||
|
1562 |
|
|
strstr(p, RELOC("IBM,CPBW-1.0")))
|
1563 |
|
|
return PLATFORM_GENERIC;
|
1564 |
|
|
#endif /* CONFIG_PPC64 */
|
1565 |
|
|
i += sl + 1;
|
1566 |
|
|
}
|
1567 |
|
|
}
|
1568 |
|
|
#ifdef CONFIG_PPC64
|
1569 |
|
|
/* If not a mac, try to figure out if it's an IBM pSeries or any other
|
1570 |
|
|
* PAPR compliant platform. We assume it is if :
|
1571 |
|
|
* - /device_type is "chrp" (please, do NOT use that for future
|
1572 |
|
|
* non-IBM designs !
|
1573 |
|
|
* - it has /rtas
|
1574 |
|
|
*/
|
1575 |
|
|
len = prom_getprop(_prom->root, "device_type",
|
1576 |
|
|
compat, sizeof(compat)-1);
|
1577 |
|
|
if (len <= 0)
|
1578 |
|
|
return PLATFORM_GENERIC;
|
1579 |
|
|
if (strcmp(compat, RELOC("chrp")))
|
1580 |
|
|
return PLATFORM_GENERIC;
|
1581 |
|
|
|
1582 |
|
|
/* Default to pSeries. We need to know if we are running LPAR */
|
1583 |
|
|
rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
|
1584 |
|
|
if (!PHANDLE_VALID(rtas))
|
1585 |
|
|
return PLATFORM_GENERIC;
|
1586 |
|
|
x = prom_getproplen(rtas, "ibm,hypertas-functions");
|
1587 |
|
|
if (x != PROM_ERROR) {
|
1588 |
|
|
prom_printf("Hypertas detected, assuming LPAR !\n");
|
1589 |
|
|
return PLATFORM_PSERIES_LPAR;
|
1590 |
|
|
}
|
1591 |
|
|
return PLATFORM_PSERIES;
|
1592 |
|
|
#else
|
1593 |
|
|
return PLATFORM_GENERIC;
|
1594 |
|
|
#endif
|
1595 |
|
|
}
|
1596 |
|
|
|
1597 |
|
|
static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
|
1598 |
|
|
{
|
1599 |
|
|
return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
|
1600 |
|
|
}
|
1601 |
|
|
|
1602 |
|
|
/*
|
1603 |
|
|
* If we have a display that we don't know how to drive,
|
1604 |
|
|
* we will want to try to execute OF's open method for it
|
1605 |
|
|
* later. However, OF will probably fall over if we do that
|
1606 |
|
|
* we've taken over the MMU.
|
1607 |
|
|
* So we check whether we will need to open the display,
|
1608 |
|
|
* and if so, open it now.
|
1609 |
|
|
*/
|
1610 |
|
|
static void __init prom_check_displays(void)
|
1611 |
|
|
{
|
1612 |
|
|
char type[16], *path;
|
1613 |
|
|
phandle node;
|
1614 |
|
|
ihandle ih;
|
1615 |
|
|
int i;
|
1616 |
|
|
|
1617 |
|
|
static unsigned char default_colors[] = {
|
1618 |
|
|
0x00, 0x00, 0x00,
|
1619 |
|
|
0x00, 0x00, 0xaa,
|
1620 |
|
|
0x00, 0xaa, 0x00,
|
1621 |
|
|
0x00, 0xaa, 0xaa,
|
1622 |
|
|
0xaa, 0x00, 0x00,
|
1623 |
|
|
0xaa, 0x00, 0xaa,
|
1624 |
|
|
0xaa, 0xaa, 0x00,
|
1625 |
|
|
0xaa, 0xaa, 0xaa,
|
1626 |
|
|
0x55, 0x55, 0x55,
|
1627 |
|
|
0x55, 0x55, 0xff,
|
1628 |
|
|
0x55, 0xff, 0x55,
|
1629 |
|
|
0x55, 0xff, 0xff,
|
1630 |
|
|
0xff, 0x55, 0x55,
|
1631 |
|
|
0xff, 0x55, 0xff,
|
1632 |
|
|
0xff, 0xff, 0x55,
|
1633 |
|
|
0xff, 0xff, 0xff
|
1634 |
|
|
};
|
1635 |
|
|
const unsigned char *clut;
|
1636 |
|
|
|
1637 |
|
|
prom_printf("Looking for displays\n");
|
1638 |
|
|
for (node = 0; prom_next_node(&node); ) {
|
1639 |
|
|
memset(type, 0, sizeof(type));
|
1640 |
|
|
prom_getprop(node, "device_type", type, sizeof(type));
|
1641 |
|
|
if (strcmp(type, RELOC("display")) != 0)
|
1642 |
|
|
continue;
|
1643 |
|
|
|
1644 |
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
1645 |
|
|
path = RELOC(prom_scratch);
|
1646 |
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
1647 |
|
|
|
1648 |
|
|
/*
|
1649 |
|
|
* leave some room at the end of the path for appending extra
|
1650 |
|
|
* arguments
|
1651 |
|
|
*/
|
1652 |
|
|
if (call_prom("package-to-path", 3, 1, node, path,
|
1653 |
|
|
PROM_SCRATCH_SIZE-10) == PROM_ERROR)
|
1654 |
|
|
continue;
|
1655 |
|
|
prom_printf("found display : %s, opening ... ", path);
|
1656 |
|
|
|
1657 |
|
|
ih = call_prom("open", 1, 1, path);
|
1658 |
|
|
if (ih == 0) {
|
1659 |
|
|
prom_printf("failed\n");
|
1660 |
|
|
continue;
|
1661 |
|
|
}
|
1662 |
|
|
|
1663 |
|
|
/* Success */
|
1664 |
|
|
prom_printf("done\n");
|
1665 |
|
|
prom_setprop(node, path, "linux,opened", NULL, 0);
|
1666 |
|
|
|
1667 |
|
|
/* Setup a usable color table when the appropriate
|
1668 |
|
|
* method is available. Should update this to set-colors */
|
1669 |
|
|
clut = RELOC(default_colors);
|
1670 |
|
|
for (i = 0; i < 32; i++, clut += 3)
|
1671 |
|
|
if (prom_set_color(ih, i, clut[0], clut[1],
|
1672 |
|
|
clut[2]) != 0)
|
1673 |
|
|
break;
|
1674 |
|
|
|
1675 |
|
|
#ifdef CONFIG_LOGO_LINUX_CLUT224
|
1676 |
|
|
clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
|
1677 |
|
|
for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
|
1678 |
|
|
if (prom_set_color(ih, i + 32, clut[0], clut[1],
|
1679 |
|
|
clut[2]) != 0)
|
1680 |
|
|
break;
|
1681 |
|
|
#endif /* CONFIG_LOGO_LINUX_CLUT224 */
|
1682 |
|
|
}
|
1683 |
|
|
}
|
1684 |
|
|
|
1685 |
|
|
|
1686 |
|
|
/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
|
1687 |
|
|
static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
|
1688 |
|
|
unsigned long needed, unsigned long align)
|
1689 |
|
|
{
|
1690 |
|
|
void *ret;
|
1691 |
|
|
|
1692 |
|
|
*mem_start = _ALIGN(*mem_start, align);
|
1693 |
|
|
while ((*mem_start + needed) > *mem_end) {
|
1694 |
|
|
unsigned long room, chunk;
|
1695 |
|
|
|
1696 |
|
|
prom_debug("Chunk exhausted, claiming more at %x...\n",
|
1697 |
|
|
RELOC(alloc_bottom));
|
1698 |
|
|
room = RELOC(alloc_top) - RELOC(alloc_bottom);
|
1699 |
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
1700 |
|
|
room = DEVTREE_CHUNK_SIZE;
|
1701 |
|
|
if (room < PAGE_SIZE)
|
1702 |
|
|
prom_panic("No memory for flatten_device_tree (no room)");
|
1703 |
|
|
chunk = alloc_up(room, 0);
|
1704 |
|
|
if (chunk == 0)
|
1705 |
|
|
prom_panic("No memory for flatten_device_tree (claim failed)");
|
1706 |
|
|
*mem_end = RELOC(alloc_top);
|
1707 |
|
|
}
|
1708 |
|
|
|
1709 |
|
|
ret = (void *)*mem_start;
|
1710 |
|
|
*mem_start += needed;
|
1711 |
|
|
|
1712 |
|
|
return ret;
|
1713 |
|
|
}
|
1714 |
|
|
|
1715 |
|
|
#define dt_push_token(token, mem_start, mem_end) \
|
1716 |
|
|
do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
|
1717 |
|
|
|
1718 |
|
|
static unsigned long __init dt_find_string(char *str)
|
1719 |
|
|
{
|
1720 |
|
|
char *s, *os;
|
1721 |
|
|
|
1722 |
|
|
s = os = (char *)RELOC(dt_string_start);
|
1723 |
|
|
s += 4;
|
1724 |
|
|
while (s < (char *)RELOC(dt_string_end)) {
|
1725 |
|
|
if (strcmp(s, str) == 0)
|
1726 |
|
|
return s - os;
|
1727 |
|
|
s += strlen(s) + 1;
|
1728 |
|
|
}
|
1729 |
|
|
return 0;
|
1730 |
|
|
}
|
1731 |
|
|
|
1732 |
|
|
/*
|
1733 |
|
|
* The Open Firmware 1275 specification states properties must be 31 bytes or
|
1734 |
|
|
* less, however not all firmwares obey this. Make it 64 bytes to be safe.
|
1735 |
|
|
*/
|
1736 |
|
|
#define MAX_PROPERTY_NAME 64
|
1737 |
|
|
|
1738 |
|
|
static void __init scan_dt_build_strings(phandle node,
|
1739 |
|
|
unsigned long *mem_start,
|
1740 |
|
|
unsigned long *mem_end)
|
1741 |
|
|
{
|
1742 |
|
|
char *prev_name, *namep, *sstart;
|
1743 |
|
|
unsigned long soff;
|
1744 |
|
|
phandle child;
|
1745 |
|
|
|
1746 |
|
|
sstart = (char *)RELOC(dt_string_start);
|
1747 |
|
|
|
1748 |
|
|
/* get and store all property names */
|
1749 |
|
|
prev_name = RELOC("");
|
1750 |
|
|
for (;;) {
|
1751 |
|
|
/* 64 is max len of name including nul. */
|
1752 |
|
|
namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
|
1753 |
|
|
if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
|
1754 |
|
|
/* No more nodes: unwind alloc */
|
1755 |
|
|
*mem_start = (unsigned long)namep;
|
1756 |
|
|
break;
|
1757 |
|
|
}
|
1758 |
|
|
|
1759 |
|
|
/* skip "name" */
|
1760 |
|
|
if (strcmp(namep, RELOC("name")) == 0) {
|
1761 |
|
|
*mem_start = (unsigned long)namep;
|
1762 |
|
|
prev_name = RELOC("name");
|
1763 |
|
|
continue;
|
1764 |
|
|
}
|
1765 |
|
|
/* get/create string entry */
|
1766 |
|
|
soff = dt_find_string(namep);
|
1767 |
|
|
if (soff != 0) {
|
1768 |
|
|
*mem_start = (unsigned long)namep;
|
1769 |
|
|
namep = sstart + soff;
|
1770 |
|
|
} else {
|
1771 |
|
|
/* Trim off some if we can */
|
1772 |
|
|
*mem_start = (unsigned long)namep + strlen(namep) + 1;
|
1773 |
|
|
RELOC(dt_string_end) = *mem_start;
|
1774 |
|
|
}
|
1775 |
|
|
prev_name = namep;
|
1776 |
|
|
}
|
1777 |
|
|
|
1778 |
|
|
/* do all our children */
|
1779 |
|
|
child = call_prom("child", 1, 1, node);
|
1780 |
|
|
while (child != 0) {
|
1781 |
|
|
scan_dt_build_strings(child, mem_start, mem_end);
|
1782 |
|
|
child = call_prom("peer", 1, 1, child);
|
1783 |
|
|
}
|
1784 |
|
|
}
|
1785 |
|
|
|
1786 |
|
|
static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
|
1787 |
|
|
unsigned long *mem_end)
|
1788 |
|
|
{
|
1789 |
|
|
phandle child;
|
1790 |
|
|
char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
|
1791 |
|
|
unsigned long soff;
|
1792 |
|
|
unsigned char *valp;
|
1793 |
|
|
static char pname[MAX_PROPERTY_NAME];
|
1794 |
|
|
int l, room;
|
1795 |
|
|
|
1796 |
|
|
dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
|
1797 |
|
|
|
1798 |
|
|
/* get the node's full name */
|
1799 |
|
|
namep = (char *)*mem_start;
|
1800 |
|
|
room = *mem_end - *mem_start;
|
1801 |
|
|
if (room > 255)
|
1802 |
|
|
room = 255;
|
1803 |
|
|
l = call_prom("package-to-path", 3, 1, node, namep, room);
|
1804 |
|
|
if (l >= 0) {
|
1805 |
|
|
/* Didn't fit? Get more room. */
|
1806 |
|
|
if (l >= room) {
|
1807 |
|
|
if (l >= *mem_end - *mem_start)
|
1808 |
|
|
namep = make_room(mem_start, mem_end, l+1, 1);
|
1809 |
|
|
call_prom("package-to-path", 3, 1, node, namep, l);
|
1810 |
|
|
}
|
1811 |
|
|
namep[l] = '\0';
|
1812 |
|
|
|
1813 |
|
|
/* Fixup an Apple bug where they have bogus \0 chars in the
|
1814 |
|
|
* middle of the path in some properties, and extract
|
1815 |
|
|
* the unit name (everything after the last '/').
|
1816 |
|
|
*/
|
1817 |
|
|
for (lp = p = namep, ep = namep + l; p < ep; p++) {
|
1818 |
|
|
if (*p == '/')
|
1819 |
|
|
lp = namep;
|
1820 |
|
|
else if (*p != 0)
|
1821 |
|
|
*lp++ = *p;
|
1822 |
|
|
}
|
1823 |
|
|
*lp = 0;
|
1824 |
|
|
*mem_start = _ALIGN((unsigned long)lp + 1, 4);
|
1825 |
|
|
}
|
1826 |
|
|
|
1827 |
|
|
/* get it again for debugging */
|
1828 |
|
|
path = RELOC(prom_scratch);
|
1829 |
|
|
memset(path, 0, PROM_SCRATCH_SIZE);
|
1830 |
|
|
call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
|
1831 |
|
|
|
1832 |
|
|
/* get and store all properties */
|
1833 |
|
|
prev_name = RELOC("");
|
1834 |
|
|
sstart = (char *)RELOC(dt_string_start);
|
1835 |
|
|
for (;;) {
|
1836 |
|
|
if (call_prom("nextprop", 3, 1, node, prev_name,
|
1837 |
|
|
RELOC(pname)) != 1)
|
1838 |
|
|
break;
|
1839 |
|
|
|
1840 |
|
|
/* skip "name" */
|
1841 |
|
|
if (strcmp(RELOC(pname), RELOC("name")) == 0) {
|
1842 |
|
|
prev_name = RELOC("name");
|
1843 |
|
|
continue;
|
1844 |
|
|
}
|
1845 |
|
|
|
1846 |
|
|
/* find string offset */
|
1847 |
|
|
soff = dt_find_string(RELOC(pname));
|
1848 |
|
|
if (soff == 0) {
|
1849 |
|
|
prom_printf("WARNING: Can't find string index for"
|
1850 |
|
|
" <%s>, node %s\n", RELOC(pname), path);
|
1851 |
|
|
break;
|
1852 |
|
|
}
|
1853 |
|
|
prev_name = sstart + soff;
|
1854 |
|
|
|
1855 |
|
|
/* get length */
|
1856 |
|
|
l = call_prom("getproplen", 2, 1, node, RELOC(pname));
|
1857 |
|
|
|
1858 |
|
|
/* sanity checks */
|
1859 |
|
|
if (l == PROM_ERROR)
|
1860 |
|
|
continue;
|
1861 |
|
|
if (l > MAX_PROPERTY_LENGTH) {
|
1862 |
|
|
prom_printf("WARNING: ignoring large property ");
|
1863 |
|
|
/* It seems OF doesn't null-terminate the path :-( */
|
1864 |
|
|
prom_printf("[%s] ", path);
|
1865 |
|
|
prom_printf("%s length 0x%x\n", RELOC(pname), l);
|
1866 |
|
|
continue;
|
1867 |
|
|
}
|
1868 |
|
|
|
1869 |
|
|
/* push property head */
|
1870 |
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
1871 |
|
|
dt_push_token(l, mem_start, mem_end);
|
1872 |
|
|
dt_push_token(soff, mem_start, mem_end);
|
1873 |
|
|
|
1874 |
|
|
/* push property content */
|
1875 |
|
|
valp = make_room(mem_start, mem_end, l, 4);
|
1876 |
|
|
call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
|
1877 |
|
|
*mem_start = _ALIGN(*mem_start, 4);
|
1878 |
|
|
}
|
1879 |
|
|
|
1880 |
|
|
/* Add a "linux,phandle" property. */
|
1881 |
|
|
soff = dt_find_string(RELOC("linux,phandle"));
|
1882 |
|
|
if (soff == 0)
|
1883 |
|
|
prom_printf("WARNING: Can't find string index for"
|
1884 |
|
|
" <linux-phandle> node %s\n", path);
|
1885 |
|
|
else {
|
1886 |
|
|
dt_push_token(OF_DT_PROP, mem_start, mem_end);
|
1887 |
|
|
dt_push_token(4, mem_start, mem_end);
|
1888 |
|
|
dt_push_token(soff, mem_start, mem_end);
|
1889 |
|
|
valp = make_room(mem_start, mem_end, 4, 4);
|
1890 |
|
|
*(u32 *)valp = node;
|
1891 |
|
|
}
|
1892 |
|
|
|
1893 |
|
|
/* do all our children */
|
1894 |
|
|
child = call_prom("child", 1, 1, node);
|
1895 |
|
|
while (child != 0) {
|
1896 |
|
|
scan_dt_build_struct(child, mem_start, mem_end);
|
1897 |
|
|
child = call_prom("peer", 1, 1, child);
|
1898 |
|
|
}
|
1899 |
|
|
|
1900 |
|
|
dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
|
1901 |
|
|
}
|
1902 |
|
|
|
1903 |
|
|
static void __init flatten_device_tree(void)
|
1904 |
|
|
{
|
1905 |
|
|
phandle root;
|
1906 |
|
|
unsigned long mem_start, mem_end, room;
|
1907 |
|
|
struct boot_param_header *hdr;
|
1908 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
1909 |
|
|
char *namep;
|
1910 |
|
|
u64 *rsvmap;
|
1911 |
|
|
|
1912 |
|
|
/*
|
1913 |
|
|
* Check how much room we have between alloc top & bottom (+/- a
|
1914 |
|
|
* few pages), crop to 4Mb, as this is our "chuck" size
|
1915 |
|
|
*/
|
1916 |
|
|
room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
|
1917 |
|
|
if (room > DEVTREE_CHUNK_SIZE)
|
1918 |
|
|
room = DEVTREE_CHUNK_SIZE;
|
1919 |
|
|
prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
|
1920 |
|
|
|
1921 |
|
|
/* Now try to claim that */
|
1922 |
|
|
mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
|
1923 |
|
|
if (mem_start == 0)
|
1924 |
|
|
prom_panic("Can't allocate initial device-tree chunk\n");
|
1925 |
|
|
mem_end = RELOC(alloc_top);
|
1926 |
|
|
|
1927 |
|
|
/* Get root of tree */
|
1928 |
|
|
root = call_prom("peer", 1, 1, (phandle)0);
|
1929 |
|
|
if (root == (phandle)0)
|
1930 |
|
|
prom_panic ("couldn't get device tree root\n");
|
1931 |
|
|
|
1932 |
|
|
/* Build header and make room for mem rsv map */
|
1933 |
|
|
mem_start = _ALIGN(mem_start, 4);
|
1934 |
|
|
hdr = make_room(&mem_start, &mem_end,
|
1935 |
|
|
sizeof(struct boot_param_header), 4);
|
1936 |
|
|
RELOC(dt_header_start) = (unsigned long)hdr;
|
1937 |
|
|
rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
|
1938 |
|
|
|
1939 |
|
|
/* Start of strings */
|
1940 |
|
|
mem_start = PAGE_ALIGN(mem_start);
|
1941 |
|
|
RELOC(dt_string_start) = mem_start;
|
1942 |
|
|
mem_start += 4; /* hole */
|
1943 |
|
|
|
1944 |
|
|
/* Add "linux,phandle" in there, we'll need it */
|
1945 |
|
|
namep = make_room(&mem_start, &mem_end, 16, 1);
|
1946 |
|
|
strcpy(namep, RELOC("linux,phandle"));
|
1947 |
|
|
mem_start = (unsigned long)namep + strlen(namep) + 1;
|
1948 |
|
|
|
1949 |
|
|
/* Build string array */
|
1950 |
|
|
prom_printf("Building dt strings...\n");
|
1951 |
|
|
scan_dt_build_strings(root, &mem_start, &mem_end);
|
1952 |
|
|
RELOC(dt_string_end) = mem_start;
|
1953 |
|
|
|
1954 |
|
|
/* Build structure */
|
1955 |
|
|
mem_start = PAGE_ALIGN(mem_start);
|
1956 |
|
|
RELOC(dt_struct_start) = mem_start;
|
1957 |
|
|
prom_printf("Building dt structure...\n");
|
1958 |
|
|
scan_dt_build_struct(root, &mem_start, &mem_end);
|
1959 |
|
|
dt_push_token(OF_DT_END, &mem_start, &mem_end);
|
1960 |
|
|
RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
|
1961 |
|
|
|
1962 |
|
|
/* Finish header */
|
1963 |
|
|
hdr->boot_cpuid_phys = _prom->cpu;
|
1964 |
|
|
hdr->magic = OF_DT_HEADER;
|
1965 |
|
|
hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
|
1966 |
|
|
hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
|
1967 |
|
|
hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
|
1968 |
|
|
hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
|
1969 |
|
|
hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
|
1970 |
|
|
hdr->version = OF_DT_VERSION;
|
1971 |
|
|
/* Version 16 is not backward compatible */
|
1972 |
|
|
hdr->last_comp_version = 0x10;
|
1973 |
|
|
|
1974 |
|
|
/* Copy the reserve map in */
|
1975 |
|
|
memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
|
1976 |
|
|
|
1977 |
|
|
#ifdef DEBUG_PROM
|
1978 |
|
|
{
|
1979 |
|
|
int i;
|
1980 |
|
|
prom_printf("reserved memory map:\n");
|
1981 |
|
|
for (i = 0; i < RELOC(mem_reserve_cnt); i++)
|
1982 |
|
|
prom_printf(" %x - %x\n",
|
1983 |
|
|
RELOC(mem_reserve_map)[i].base,
|
1984 |
|
|
RELOC(mem_reserve_map)[i].size);
|
1985 |
|
|
}
|
1986 |
|
|
#endif
|
1987 |
|
|
/* Bump mem_reserve_cnt to cause further reservations to fail
|
1988 |
|
|
* since it's too late.
|
1989 |
|
|
*/
|
1990 |
|
|
RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
|
1991 |
|
|
|
1992 |
|
|
prom_printf("Device tree strings 0x%x -> 0x%x\n",
|
1993 |
|
|
RELOC(dt_string_start), RELOC(dt_string_end));
|
1994 |
|
|
prom_printf("Device tree struct 0x%x -> 0x%x\n",
|
1995 |
|
|
RELOC(dt_struct_start), RELOC(dt_struct_end));
|
1996 |
|
|
|
1997 |
|
|
}
|
1998 |
|
|
|
1999 |
|
|
#ifdef CONFIG_PPC_MAPLE
|
2000 |
|
|
/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
|
2001 |
|
|
* The values are bad, and it doesn't even have the right number of cells. */
|
2002 |
|
|
static void __init fixup_device_tree_maple(void)
|
2003 |
|
|
{
|
2004 |
|
|
phandle isa;
|
2005 |
|
|
u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
|
2006 |
|
|
u32 isa_ranges[6];
|
2007 |
|
|
char *name;
|
2008 |
|
|
|
2009 |
|
|
name = "/ht@0/isa@4";
|
2010 |
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
2011 |
|
|
if (!PHANDLE_VALID(isa)) {
|
2012 |
|
|
name = "/ht@0/isa@6";
|
2013 |
|
|
isa = call_prom("finddevice", 1, 1, ADDR(name));
|
2014 |
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
2015 |
|
|
}
|
2016 |
|
|
if (!PHANDLE_VALID(isa))
|
2017 |
|
|
return;
|
2018 |
|
|
|
2019 |
|
|
if (prom_getproplen(isa, "ranges") != 12)
|
2020 |
|
|
return;
|
2021 |
|
|
if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
|
2022 |
|
|
== PROM_ERROR)
|
2023 |
|
|
return;
|
2024 |
|
|
|
2025 |
|
|
if (isa_ranges[0] != 0x1 ||
|
2026 |
|
|
isa_ranges[1] != 0xf4000000 ||
|
2027 |
|
|
isa_ranges[2] != 0x00010000)
|
2028 |
|
|
return;
|
2029 |
|
|
|
2030 |
|
|
prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
|
2031 |
|
|
|
2032 |
|
|
isa_ranges[0] = 0x1;
|
2033 |
|
|
isa_ranges[1] = 0x0;
|
2034 |
|
|
isa_ranges[2] = rloc;
|
2035 |
|
|
isa_ranges[3] = 0x0;
|
2036 |
|
|
isa_ranges[4] = 0x0;
|
2037 |
|
|
isa_ranges[5] = 0x00010000;
|
2038 |
|
|
prom_setprop(isa, name, "ranges",
|
2039 |
|
|
isa_ranges, sizeof(isa_ranges));
|
2040 |
|
|
}
|
2041 |
|
|
#else
|
2042 |
|
|
#define fixup_device_tree_maple()
|
2043 |
|
|
#endif
|
2044 |
|
|
|
2045 |
|
|
#ifdef CONFIG_PPC_CHRP
|
2046 |
|
|
/*
|
2047 |
|
|
* Pegasos and BriQ lacks the "ranges" property in the isa node
|
2048 |
|
|
* Pegasos needs decimal IRQ 14/15, not hexadecimal
|
2049 |
|
|
* Pegasos has the IDE configured in legacy mode, but advertised as native
|
2050 |
|
|
*/
|
2051 |
|
|
static void __init fixup_device_tree_chrp(void)
|
2052 |
|
|
{
|
2053 |
|
|
phandle ph;
|
2054 |
|
|
u32 prop[6];
|
2055 |
|
|
u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
|
2056 |
|
|
char *name;
|
2057 |
|
|
int rc;
|
2058 |
|
|
|
2059 |
|
|
name = "/pci@80000000/isa@c";
|
2060 |
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
2061 |
|
|
if (!PHANDLE_VALID(ph)) {
|
2062 |
|
|
name = "/pci@ff500000/isa@6";
|
2063 |
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
2064 |
|
|
rloc = 0x01003000; /* IO space; PCI device = 6 */
|
2065 |
|
|
}
|
2066 |
|
|
if (PHANDLE_VALID(ph)) {
|
2067 |
|
|
rc = prom_getproplen(ph, "ranges");
|
2068 |
|
|
if (rc == 0 || rc == PROM_ERROR) {
|
2069 |
|
|
prom_printf("Fixing up missing ISA range on Pegasos...\n");
|
2070 |
|
|
|
2071 |
|
|
prop[0] = 0x1;
|
2072 |
|
|
prop[1] = 0x0;
|
2073 |
|
|
prop[2] = rloc;
|
2074 |
|
|
prop[3] = 0x0;
|
2075 |
|
|
prop[4] = 0x0;
|
2076 |
|
|
prop[5] = 0x00010000;
|
2077 |
|
|
prom_setprop(ph, name, "ranges", prop, sizeof(prop));
|
2078 |
|
|
}
|
2079 |
|
|
}
|
2080 |
|
|
|
2081 |
|
|
name = "/pci@80000000/ide@C,1";
|
2082 |
|
|
ph = call_prom("finddevice", 1, 1, ADDR(name));
|
2083 |
|
|
if (PHANDLE_VALID(ph)) {
|
2084 |
|
|
prom_printf("Fixing up IDE interrupt on Pegasos...\n");
|
2085 |
|
|
prop[0] = 14;
|
2086 |
|
|
prop[1] = 0x0;
|
2087 |
|
|
prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
|
2088 |
|
|
prom_printf("Fixing up IDE class-code on Pegasos...\n");
|
2089 |
|
|
rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
|
2090 |
|
|
if (rc == sizeof(u32)) {
|
2091 |
|
|
prop[0] &= ~0x5;
|
2092 |
|
|
prom_setprop(ph, name, "class-code", prop, sizeof(u32));
|
2093 |
|
|
}
|
2094 |
|
|
}
|
2095 |
|
|
}
|
2096 |
|
|
#else
|
2097 |
|
|
#define fixup_device_tree_chrp()
|
2098 |
|
|
#endif
|
2099 |
|
|
|
2100 |
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
|
2101 |
|
|
static void __init fixup_device_tree_pmac(void)
|
2102 |
|
|
{
|
2103 |
|
|
phandle u3, i2c, mpic;
|
2104 |
|
|
u32 u3_rev;
|
2105 |
|
|
u32 interrupts[2];
|
2106 |
|
|
u32 parent;
|
2107 |
|
|
|
2108 |
|
|
/* Some G5s have a missing interrupt definition, fix it up here */
|
2109 |
|
|
u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
|
2110 |
|
|
if (!PHANDLE_VALID(u3))
|
2111 |
|
|
return;
|
2112 |
|
|
i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
|
2113 |
|
|
if (!PHANDLE_VALID(i2c))
|
2114 |
|
|
return;
|
2115 |
|
|
mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
|
2116 |
|
|
if (!PHANDLE_VALID(mpic))
|
2117 |
|
|
return;
|
2118 |
|
|
|
2119 |
|
|
/* check if proper rev of u3 */
|
2120 |
|
|
if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
|
2121 |
|
|
== PROM_ERROR)
|
2122 |
|
|
return;
|
2123 |
|
|
if (u3_rev < 0x35 || u3_rev > 0x39)
|
2124 |
|
|
return;
|
2125 |
|
|
/* does it need fixup ? */
|
2126 |
|
|
if (prom_getproplen(i2c, "interrupts") > 0)
|
2127 |
|
|
return;
|
2128 |
|
|
|
2129 |
|
|
prom_printf("fixing up bogus interrupts for u3 i2c...\n");
|
2130 |
|
|
|
2131 |
|
|
/* interrupt on this revision of u3 is number 0 and level */
|
2132 |
|
|
interrupts[0] = 0;
|
2133 |
|
|
interrupts[1] = 1;
|
2134 |
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
|
2135 |
|
|
&interrupts, sizeof(interrupts));
|
2136 |
|
|
parent = (u32)mpic;
|
2137 |
|
|
prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
|
2138 |
|
|
&parent, sizeof(parent));
|
2139 |
|
|
}
|
2140 |
|
|
#else
|
2141 |
|
|
#define fixup_device_tree_pmac()
|
2142 |
|
|
#endif
|
2143 |
|
|
|
2144 |
|
|
#ifdef CONFIG_PPC_EFIKA
|
2145 |
|
|
/* The current fw of the Efika has a device tree needs quite a few
|
2146 |
|
|
* fixups to be compliant with the mpc52xx bindings. It's currently
|
2147 |
|
|
* unknown if it will ever be compliant (come on bPlan ...) so we do fixups.
|
2148 |
|
|
* NOTE that we (barely) tolerate it because the EFIKA was out before
|
2149 |
|
|
* the bindings were finished, for any new boards -> RTFM ! */
|
2150 |
|
|
|
2151 |
|
|
struct subst_entry {
|
2152 |
|
|
char *path;
|
2153 |
|
|
char *property;
|
2154 |
|
|
void *value;
|
2155 |
|
|
int value_len;
|
2156 |
|
|
};
|
2157 |
|
|
|
2158 |
|
|
static void __init fixup_device_tree_efika(void)
|
2159 |
|
|
{
|
2160 |
|
|
/* Substitution table */
|
2161 |
|
|
#define prop_cstr(x) x, sizeof(x)
|
2162 |
|
|
int prop_sound_irq[3] = { 2, 2, 0 };
|
2163 |
|
|
int prop_bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
|
2164 |
|
|
3,4,0, 3,5,0, 3,6,0, 3,7,0,
|
2165 |
|
|
3,8,0, 3,9,0, 3,10,0, 3,11,0,
|
2166 |
|
|
3,12,0, 3,13,0, 3,14,0, 3,15,0 };
|
2167 |
|
|
struct subst_entry efika_subst_table[] = {
|
2168 |
|
|
{ "/", "device_type", prop_cstr("efika") },
|
2169 |
|
|
{ "/builtin", "device_type", prop_cstr("soc") },
|
2170 |
|
|
{ "/builtin/ata", "compatible", prop_cstr("mpc5200b-ata\0mpc5200-ata"), },
|
2171 |
|
|
{ "/builtin/bestcomm", "compatible", prop_cstr("mpc5200b-bestcomm\0mpc5200-bestcomm") },
|
2172 |
|
|
{ "/builtin/bestcomm", "interrupts", prop_bcomm_irq, sizeof(prop_bcomm_irq) },
|
2173 |
|
|
{ "/builtin/ethernet", "compatible", prop_cstr("mpc5200b-fec\0mpc5200-fec") },
|
2174 |
|
|
{ "/builtin/pic", "compatible", prop_cstr("mpc5200b-pic\0mpc5200-pic") },
|
2175 |
|
|
{ "/builtin/serial", "compatible", prop_cstr("mpc5200b-psc-uart\0mpc5200-psc-uart") },
|
2176 |
|
|
{ "/builtin/sound", "compatible", prop_cstr("mpc5200b-psc-ac97\0mpc5200-psc-ac97") },
|
2177 |
|
|
{ "/builtin/sound", "interrupts", prop_sound_irq, sizeof(prop_sound_irq) },
|
2178 |
|
|
{ "/builtin/sram", "compatible", prop_cstr("mpc5200b-sram\0mpc5200-sram") },
|
2179 |
|
|
{ "/builtin/sram", "device_type", prop_cstr("sram") },
|
2180 |
|
|
{}
|
2181 |
|
|
};
|
2182 |
|
|
#undef prop_cstr
|
2183 |
|
|
|
2184 |
|
|
/* Vars */
|
2185 |
|
|
u32 node;
|
2186 |
|
|
char prop[64];
|
2187 |
|
|
int rv, i;
|
2188 |
|
|
|
2189 |
|
|
/* Check if we're really running on a EFIKA */
|
2190 |
|
|
node = call_prom("finddevice", 1, 1, ADDR("/"));
|
2191 |
|
|
if (!PHANDLE_VALID(node))
|
2192 |
|
|
return;
|
2193 |
|
|
|
2194 |
|
|
rv = prom_getprop(node, "model", prop, sizeof(prop));
|
2195 |
|
|
if (rv == PROM_ERROR)
|
2196 |
|
|
return;
|
2197 |
|
|
if (strcmp(prop, "EFIKA5K2"))
|
2198 |
|
|
return;
|
2199 |
|
|
|
2200 |
|
|
prom_printf("Applying EFIKA device tree fixups\n");
|
2201 |
|
|
|
2202 |
|
|
/* Process substitution table */
|
2203 |
|
|
for (i=0; efika_subst_table[i].path; i++) {
|
2204 |
|
|
struct subst_entry *se = &efika_subst_table[i];
|
2205 |
|
|
|
2206 |
|
|
node = call_prom("finddevice", 1, 1, ADDR(se->path));
|
2207 |
|
|
if (!PHANDLE_VALID(node)) {
|
2208 |
|
|
prom_printf("fixup_device_tree_efika: ",
|
2209 |
|
|
"skipped entry %x - not found\n", i);
|
2210 |
|
|
continue;
|
2211 |
|
|
}
|
2212 |
|
|
|
2213 |
|
|
rv = prom_setprop(node, se->path, se->property,
|
2214 |
|
|
se->value, se->value_len );
|
2215 |
|
|
if (rv == PROM_ERROR)
|
2216 |
|
|
prom_printf("fixup_device_tree_efika: ",
|
2217 |
|
|
"skipped entry %x - setprop error\n", i);
|
2218 |
|
|
}
|
2219 |
|
|
|
2220 |
|
|
/* Make sure ethernet mdio bus node exists */
|
2221 |
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
|
2222 |
|
|
if (!PHANDLE_VALID(node)) {
|
2223 |
|
|
prom_printf("Adding Ethernet MDIO node\n");
|
2224 |
|
|
call_prom("interpret", 1, 1,
|
2225 |
|
|
" s\" /builtin\" find-device"
|
2226 |
|
|
" new-device"
|
2227 |
|
|
" 1 encode-int s\" #address-cells\" property"
|
2228 |
|
|
" 0 encode-int s\" #size-cells\" property"
|
2229 |
|
|
" s\" mdio\" 2dup device-name device-type"
|
2230 |
|
|
" s\" mpc5200b-fec-phy\" encode-string"
|
2231 |
|
|
" s\" compatible\" property"
|
2232 |
|
|
" 0xf0003000 0x400 reg"
|
2233 |
|
|
" 0x2 encode-int"
|
2234 |
|
|
" 0x5 encode-int encode+"
|
2235 |
|
|
" 0x3 encode-int encode+"
|
2236 |
|
|
" s\" interrupts\" property"
|
2237 |
|
|
" finish-device");
|
2238 |
|
|
};
|
2239 |
|
|
|
2240 |
|
|
/* Make sure ethernet phy device node exist */
|
2241 |
|
|
node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio/ethernet-phy"));
|
2242 |
|
|
if (!PHANDLE_VALID(node)) {
|
2243 |
|
|
prom_printf("Adding Ethernet PHY node\n");
|
2244 |
|
|
call_prom("interpret", 1, 1,
|
2245 |
|
|
" s\" /builtin/mdio\" find-device"
|
2246 |
|
|
" new-device"
|
2247 |
|
|
" s\" ethernet-phy\" device-name"
|
2248 |
|
|
" 0x10 encode-int s\" reg\" property"
|
2249 |
|
|
" my-self"
|
2250 |
|
|
" ihandle>phandle"
|
2251 |
|
|
" finish-device"
|
2252 |
|
|
" s\" /builtin/ethernet\" find-device"
|
2253 |
|
|
" encode-int"
|
2254 |
|
|
" s\" phy-handle\" property"
|
2255 |
|
|
" device-end");
|
2256 |
|
|
}
|
2257 |
|
|
|
2258 |
|
|
}
|
2259 |
|
|
#else
|
2260 |
|
|
#define fixup_device_tree_efika()
|
2261 |
|
|
#endif
|
2262 |
|
|
|
2263 |
|
|
static void __init fixup_device_tree(void)
|
2264 |
|
|
{
|
2265 |
|
|
fixup_device_tree_maple();
|
2266 |
|
|
fixup_device_tree_chrp();
|
2267 |
|
|
fixup_device_tree_pmac();
|
2268 |
|
|
fixup_device_tree_efika();
|
2269 |
|
|
}
|
2270 |
|
|
|
2271 |
|
|
static void __init prom_find_boot_cpu(void)
|
2272 |
|
|
{
|
2273 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
2274 |
|
|
u32 getprop_rval;
|
2275 |
|
|
ihandle prom_cpu;
|
2276 |
|
|
phandle cpu_pkg;
|
2277 |
|
|
|
2278 |
|
|
_prom->cpu = 0;
|
2279 |
|
|
if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
|
2280 |
|
|
return;
|
2281 |
|
|
|
2282 |
|
|
cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
|
2283 |
|
|
|
2284 |
|
|
prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
|
2285 |
|
|
_prom->cpu = getprop_rval;
|
2286 |
|
|
|
2287 |
|
|
prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu);
|
2288 |
|
|
}
|
2289 |
|
|
|
2290 |
|
|
static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
|
2291 |
|
|
{
|
2292 |
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
2293 |
|
|
struct prom_t *_prom = &RELOC(prom);
|
2294 |
|
|
|
2295 |
|
|
if (r3 && r4 && r4 != 0xdeadbeef) {
|
2296 |
|
|
unsigned long val;
|
2297 |
|
|
|
2298 |
|
|
RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
|
2299 |
|
|
RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
|
2300 |
|
|
|
2301 |
|
|
val = RELOC(prom_initrd_start);
|
2302 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start",
|
2303 |
|
|
&val, sizeof(val));
|
2304 |
|
|
val = RELOC(prom_initrd_end);
|
2305 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end",
|
2306 |
|
|
&val, sizeof(val));
|
2307 |
|
|
|
2308 |
|
|
reserve_mem(RELOC(prom_initrd_start),
|
2309 |
|
|
RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
|
2310 |
|
|
|
2311 |
|
|
prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
|
2312 |
|
|
prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
|
2313 |
|
|
}
|
2314 |
|
|
#endif /* CONFIG_BLK_DEV_INITRD */
|
2315 |
|
|
}
|
2316 |
|
|
|
2317 |
|
|
/*
|
2318 |
|
|
* We enter here early on, when the Open Firmware prom is still
|
2319 |
|
|
* handling exceptions and the MMU hash table for us.
|
2320 |
|
|
*/
|
2321 |
|
|
|
2322 |
|
|
unsigned long __init prom_init(unsigned long r3, unsigned long r4,
|
2323 |
|
|
unsigned long pp,
|
2324 |
|
|
unsigned long r6, unsigned long r7)
|
2325 |
|
|
{
|
2326 |
|
|
struct prom_t *_prom;
|
2327 |
|
|
unsigned long hdr;
|
2328 |
|
|
unsigned long offset = reloc_offset();
|
2329 |
|
|
|
2330 |
|
|
#ifdef CONFIG_PPC32
|
2331 |
|
|
reloc_got2(offset);
|
2332 |
|
|
#endif
|
2333 |
|
|
|
2334 |
|
|
_prom = &RELOC(prom);
|
2335 |
|
|
|
2336 |
|
|
/*
|
2337 |
|
|
* First zero the BSS
|
2338 |
|
|
*/
|
2339 |
|
|
memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start);
|
2340 |
|
|
|
2341 |
|
|
/*
|
2342 |
|
|
* Init interface to Open Firmware, get some node references,
|
2343 |
|
|
* like /chosen
|
2344 |
|
|
*/
|
2345 |
|
|
prom_init_client_services(pp);
|
2346 |
|
|
|
2347 |
|
|
/*
|
2348 |
|
|
* See if this OF is old enough that we need to do explicit maps
|
2349 |
|
|
* and other workarounds
|
2350 |
|
|
*/
|
2351 |
|
|
prom_find_mmu();
|
2352 |
|
|
|
2353 |
|
|
/*
|
2354 |
|
|
* Init prom stdout device
|
2355 |
|
|
*/
|
2356 |
|
|
prom_init_stdout();
|
2357 |
|
|
|
2358 |
|
|
/*
|
2359 |
|
|
* Get default machine type. At this point, we do not differentiate
|
2360 |
|
|
* between pSeries SMP and pSeries LPAR
|
2361 |
|
|
*/
|
2362 |
|
|
RELOC(of_platform) = prom_find_machine_type();
|
2363 |
|
|
|
2364 |
|
|
/* Bail if this is a kdump kernel. */
|
2365 |
|
|
if (PHYSICAL_START > 0)
|
2366 |
|
|
prom_panic("Error: You can't boot a kdump kernel from OF!\n");
|
2367 |
|
|
|
2368 |
|
|
/*
|
2369 |
|
|
* Check for an initrd
|
2370 |
|
|
*/
|
2371 |
|
|
prom_check_initrd(r3, r4);
|
2372 |
|
|
|
2373 |
|
|
#ifdef CONFIG_PPC_PSERIES
|
2374 |
|
|
/*
|
2375 |
|
|
* On pSeries, inform the firmware about our capabilities
|
2376 |
|
|
*/
|
2377 |
|
|
if (RELOC(of_platform) == PLATFORM_PSERIES ||
|
2378 |
|
|
RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
|
2379 |
|
|
prom_send_capabilities();
|
2380 |
|
|
#endif
|
2381 |
|
|
|
2382 |
|
|
/*
|
2383 |
|
|
* Copy the CPU hold code
|
2384 |
|
|
*/
|
2385 |
|
|
if (RELOC(of_platform) != PLATFORM_POWERMAC)
|
2386 |
|
|
copy_and_flush(0, KERNELBASE + offset, 0x100, 0);
|
2387 |
|
|
|
2388 |
|
|
/*
|
2389 |
|
|
* Do early parsing of command line
|
2390 |
|
|
*/
|
2391 |
|
|
early_cmdline_parse();
|
2392 |
|
|
|
2393 |
|
|
/*
|
2394 |
|
|
* Initialize memory management within prom_init
|
2395 |
|
|
*/
|
2396 |
|
|
prom_init_mem();
|
2397 |
|
|
|
2398 |
|
|
/*
|
2399 |
|
|
* Determine which cpu is actually running right _now_
|
2400 |
|
|
*/
|
2401 |
|
|
prom_find_boot_cpu();
|
2402 |
|
|
|
2403 |
|
|
/*
|
2404 |
|
|
* Initialize display devices
|
2405 |
|
|
*/
|
2406 |
|
|
prom_check_displays();
|
2407 |
|
|
|
2408 |
|
|
#ifdef CONFIG_PPC64
|
2409 |
|
|
/*
|
2410 |
|
|
* Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
|
2411 |
|
|
* that uses the allocator, we need to make sure we get the top of memory
|
2412 |
|
|
* available for us here...
|
2413 |
|
|
*/
|
2414 |
|
|
if (RELOC(of_platform) == PLATFORM_PSERIES)
|
2415 |
|
|
prom_initialize_tce_table();
|
2416 |
|
|
#endif
|
2417 |
|
|
|
2418 |
|
|
/*
|
2419 |
|
|
* On non-powermacs, try to instantiate RTAS and puts all CPUs
|
2420 |
|
|
* in spin-loops. PowerMacs don't have a working RTAS and use
|
2421 |
|
|
* a different way to spin CPUs
|
2422 |
|
|
*/
|
2423 |
|
|
if (RELOC(of_platform) != PLATFORM_POWERMAC) {
|
2424 |
|
|
prom_instantiate_rtas();
|
2425 |
|
|
prom_hold_cpus();
|
2426 |
|
|
}
|
2427 |
|
|
|
2428 |
|
|
/*
|
2429 |
|
|
* Fill in some infos for use by the kernel later on
|
2430 |
|
|
*/
|
2431 |
|
|
#ifdef CONFIG_PPC64
|
2432 |
|
|
if (RELOC(prom_iommu_off))
|
2433 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
|
2434 |
|
|
NULL, 0);
|
2435 |
|
|
|
2436 |
|
|
if (RELOC(prom_iommu_force_on))
|
2437 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on",
|
2438 |
|
|
NULL, 0);
|
2439 |
|
|
|
2440 |
|
|
if (RELOC(prom_tce_alloc_start)) {
|
2441 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start",
|
2442 |
|
|
&RELOC(prom_tce_alloc_start),
|
2443 |
|
|
sizeof(prom_tce_alloc_start));
|
2444 |
|
|
prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end",
|
2445 |
|
|
&RELOC(prom_tce_alloc_end),
|
2446 |
|
|
sizeof(prom_tce_alloc_end));
|
2447 |
|
|
}
|
2448 |
|
|
#endif
|
2449 |
|
|
|
2450 |
|
|
/*
|
2451 |
|
|
* Fixup any known bugs in the device-tree
|
2452 |
|
|
*/
|
2453 |
|
|
fixup_device_tree();
|
2454 |
|
|
|
2455 |
|
|
/*
|
2456 |
|
|
* Now finally create the flattened device-tree
|
2457 |
|
|
*/
|
2458 |
|
|
prom_printf("copying OF device tree ...\n");
|
2459 |
|
|
flatten_device_tree();
|
2460 |
|
|
|
2461 |
|
|
/*
|
2462 |
|
|
* in case stdin is USB and still active on IBM machines...
|
2463 |
|
|
* Unfortunately quiesce crashes on some powermacs if we have
|
2464 |
|
|
* closed stdin already (in particular the powerbook 101).
|
2465 |
|
|
*/
|
2466 |
|
|
if (RELOC(of_platform) != PLATFORM_POWERMAC)
|
2467 |
|
|
prom_close_stdin();
|
2468 |
|
|
|
2469 |
|
|
/*
|
2470 |
|
|
* Call OF "quiesce" method to shut down pending DMA's from
|
2471 |
|
|
* devices etc...
|
2472 |
|
|
*/
|
2473 |
|
|
prom_printf("Calling quiesce ...\n");
|
2474 |
|
|
call_prom("quiesce", 0, 0);
|
2475 |
|
|
|
2476 |
|
|
/*
|
2477 |
|
|
* And finally, call the kernel passing it the flattened device
|
2478 |
|
|
* tree and NULL as r5, thus triggering the new entry point which
|
2479 |
|
|
* is common to us and kexec
|
2480 |
|
|
*/
|
2481 |
|
|
hdr = RELOC(dt_header_start);
|
2482 |
|
|
prom_printf("returning from prom_init\n");
|
2483 |
|
|
prom_debug("->dt_header_start=0x%x\n", hdr);
|
2484 |
|
|
|
2485 |
|
|
#ifdef CONFIG_PPC32
|
2486 |
|
|
reloc_got2(-offset);
|
2487 |
|
|
#endif
|
2488 |
|
|
|
2489 |
|
|
__start(hdr, KERNELBASE + offset, 0);
|
2490 |
|
|
|
2491 |
|
|
return 0;
|
2492 |
|
|
}
|