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jcastillo |
/* $Id: vaddrs.h,v 1.1 2005-12-20 11:32:12 jcastillo Exp $ */
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#ifndef _SPARC_VADDRS_H
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#define _SPARC_VADDRS_H
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#include <asm/head.h>
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/* asm-sparc/vaddrs.h: Here will be define the virtual addresses at
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* which important I/O addresses will be mapped.
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* For instance the timer register virtual address
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* is defined here.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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/* I can see only one reason why we should have statically defined
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* mappings for devices and is the speedup improvements of not loading
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* a pointer and then the value in the assembly code
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*/
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#define IOBASE_VADDR 0xfe000000 /* Base for mapping pages */
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#define IOBASE_LEN 0x00200000 /* Length of the IO area */
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#define IOBASE_END 0xfe200000
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#define DVMA_VADDR 0xfff00000 /* Base area of the DVMA on suns */
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#define DVMA_LEN 0x00040000 /* Size of the DVMA address space */
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#define DVMA_END 0xfff40000
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/* IOMMU Mapping area, must be on a 16MB boundary! Note this
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* doesn't count the DVMA areas, the prom lives between the
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* iommu mapping area (for scsi transfer buffers) and the
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* dvma upper range (for lance packet ring buffers).
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*/
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#define IOMMU_VADDR 0xff000000
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#define IOMMU_LEN 0x00c00000
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#define IOMMU_END 0xffc00000 /* KADB debugger vm starts here */
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/* On the sun4/4c we don't need an IOMMU area, but we need a place
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* to reliably map locked down kernel data. This includes the
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* task_struct and kernel stack pages of each process plus the
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* scsi buffers during dvma IO transfers, also the floppy buffers
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* during pseudo dma which runs with traps off (no faults allowed).
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* Some quick calculations yield:
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* NR_TASKS <512> * (3 * PAGE_SIZE) == 0x600000
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* Subtract this from 0xc00000 and you get 0x927C0 of vm left
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* over to map SCSI dvma + floppy pseudo-dma buffers. So be
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* careful if you change NR_TASKS or else there won't be enough
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* room for it all.
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*/
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#define SUN4C_LOCK_VADDR 0xff000000
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#define SUN4C_LOCK_LEN 0x00c00000
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#define SUN4C_LOCK_END 0xffc00000
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/* On sun4m machines we need per-cpu virtual areas */
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#define PERCPU_VADDR 0xffc00000 /* Base for per-cpu virtual mappings */
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#define PERCPU_ENTSIZE 0x00100000
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#define PERCPU_LEN ((PERCPU_ENTSIZE*NCPUS))
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/* per-cpu offsets */
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#define PERCPU_TBR_OFFSET 0x00000 /* %tbr, mainly used for identification. */
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#define PERCPU_KSTACK_OFFSET 0x01000 /* Beginning of kernel stack for this cpu */
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#define PERCPU_MBOX_OFFSET 0x03000 /* Prom SMP Mailbox */
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#define PERCPU_CPUID_OFFSET 0x04000 /* Per-cpu ID number. */
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#define PERCPU_ISALIVE_OFFSET 0x04004 /* Has CPU been initted yet? */
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#define PERCPU_ISIDLING_OFFSET 0x04008 /* Is CPU in idle loop spinning? */
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#endif /* !(_SPARC_VADDRS_H) */
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