/*
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/*
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* Copyright (C) 1999 Keith Adams <kma@cse.ogi.edu>
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* Copyright (C) 1999 Keith Adams <kma@cse.ogi.edu>
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* Oregon Graduate Institute
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* Oregon Graduate Institute
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*
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*
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* Bios and PCI stuff.
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* Bios and PCI stuff.
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*/
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*/
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#include <linux/pci.h>
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#include <linux/pci.h>
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#include <linux/bios32.h>
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#include <linux/bios32.h>
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <asm/system.h>
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#include <asm/system.h>
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unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end)
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unsigned long bios32_init(unsigned long memory_start, unsigned long memory_end)
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{
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{
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return memory_start;
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return memory_start;
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}
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}
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unsigned long pcibios_init(unsigned long memory_start, unsigned long memory_end)
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unsigned long pcibios_init(unsigned long memory_start, unsigned long memory_end)
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{
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{
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return memory_start;
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return memory_start;
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}
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}
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unsigned long pcibios_fixup(unsigned long memory_start, unsigned long memory_end)
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unsigned long pcibios_fixup(unsigned long memory_start, unsigned long memory_end)
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{
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{
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return memory_start;
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return memory_start;
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}
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}
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#ifdef CONFIG_MON960
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#ifdef CONFIG_MON960
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#include <asm/mon960.h>
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#include <asm/mon960.h>
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/*
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/*
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* mon960 system calls for pci management
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* mon960 system calls for pci management
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*/
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*/
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extern int mon960_pcibios_present(void* info);
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extern int mon960_pcibios_present(void* info);
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extern int mon960_pcibios_find_device(int vendor, int dev, int idx, void* loc);
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extern int mon960_pcibios_find_device(int vendor, int dev, int idx, void* loc);
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extern int mon960_pcibios_find_class(int class, int idx, void* dev);
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extern int mon960_pcibios_find_class(int class, int idx, void* dev);
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int pcibios_present(void)
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int pcibios_present(void)
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{
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{
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return 1;
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return 1;
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}
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}
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int pcibios_find_device(unsigned short vendor, unsigned short dev,
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int pcibios_find_device(unsigned short vendor, unsigned short dev,
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unsigned short index, unsigned char* bus,
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unsigned short index, unsigned char* bus,
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unsigned char* dev_fn)
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unsigned char* dev_fn)
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{
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{
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pci_dev_info loc;
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pci_dev_info loc;
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int status;
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int status;
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if ((status=mon960_pcibios_find_device(vendor, dev, index, &loc)))
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if ((status=mon960_pcibios_find_device(vendor, dev, index, &loc)))
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return -1;
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return -1;
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printk("PCI device found: %x, %x, %x\n", loc.bus, loc.dev, loc.fn);
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printk("PCI device found: %x, %x, %x\n", loc.bus, loc.dev, loc.fn);
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*bus = loc.bus;
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*bus = loc.bus;
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*dev_fn = loc.dev;
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*dev_fn = loc.dev;
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return 0;
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return 0;
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}
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}
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int pcibios_find_class(unsigned int class, unsigned short idx,
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int pcibios_find_class(unsigned int class, unsigned short idx,
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unsigned char* bus, unsigned char* dev_fn)
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unsigned char* bus, unsigned char* dev_fn)
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{
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{
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pci_dev_info loc;
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pci_dev_info loc;
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int status;
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int status;
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if ((status=mon960_pcibios_find_class(class, idx, &loc)))
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if ((status=mon960_pcibios_find_class(class, idx, &loc)))
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return -1;
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return -1;
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*bus = loc.bus;
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*bus = loc.bus;
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*dev_fn = loc.dev;
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*dev_fn = loc.dev;
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return 0;
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return 0;
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}
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}
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#define CONFIG_RDWR(op,sz,type) \
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#define CONFIG_RDWR(op,sz,type) \
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int pcibios_ ## op ## _config_ ## sz(unsigned char bus, unsigned char fn, \
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int pcibios_ ## op ## _config_ ## sz(unsigned char bus, unsigned char fn, \
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unsigned char offset, type val) \
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unsigned char offset, type val) \
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{ \
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{ \
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return mon960_pcibios_ ## op ## _config_ ## sz(bus, fn, 0, offset, val); \
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return mon960_pcibios_ ## op ## _config_ ## sz(bus, fn, 0, offset, val); \
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}
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}
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CONFIG_RDWR(read,byte,unsigned char*);
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CONFIG_RDWR(read,byte,unsigned char*);
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CONFIG_RDWR(read,word,unsigned short*);
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CONFIG_RDWR(read,word,unsigned short*);
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CONFIG_RDWR(read,dword,unsigned int*);
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CONFIG_RDWR(read,dword,unsigned int*);
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CONFIG_RDWR(write,byte,unsigned char);
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CONFIG_RDWR(write,byte,unsigned char);
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CONFIG_RDWR(write,word,unsigned short);
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CONFIG_RDWR(write,word,unsigned short);
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CONFIG_RDWR(write,dword,unsigned int);
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CONFIG_RDWR(write,dword,unsigned int);
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#endif /* CONFIG_MON960 */
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#endif /* CONFIG_MON960 */
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/*
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/*
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* Dealing with the ATU. We just do all accesses translated; checking
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* Dealing with the ATU. We just do all accesses translated; checking
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* whether we can directly use the address might not be any faster.
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* whether we can directly use the address might not be any faster.
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*/
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*/
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/* external address = (local address & 0x03ffffff) | ATU_OMWVR */
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/* external address = (local address & 0x03ffffff) | ATU_OMWVR */
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#define OIOW_BASE 0x90000000UL /* outbound I/O space window */
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#define OIOW_BASE 0x90000000UL /* outbound I/O space window */
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#define ATU_OIOWVR ((unsigned long*) 0x125c) /* I/O window val */
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#define ATU_OIOWVR ((unsigned long*) 0x125c) /* I/O window val */
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/* Set up ATU, return local address to use */
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/* Set up ATU, return local address to use */
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static unsigned long program_atu(unsigned long pciaddr)
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static unsigned long program_atu(unsigned long pciaddr)
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{
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{
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unsigned long retval;
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unsigned long retval;
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unsigned long pci_hibits = pciaddr & 0xfc000000;
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unsigned long pci_hibits = pciaddr & 0xfc000000;
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*ATU_OIOWVR = pci_hibits;
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*ATU_OIOWVR = pci_hibits;
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retval = (pciaddr & 0x03ffffff) | OIOW_BASE;
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retval = (pciaddr & 0x03ffffff) | OIOW_BASE;
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return retval;
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return retval;
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}
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}
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/* Note that we synchronize ATU access with the ipl.
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/* Note that we synchronize ATU access with the ipl.
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*
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*
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* XXX: diddling the ipl every time seems to be a performance problem. Is
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* XXX: diddling the ipl every time seems to be a performance problem. Is
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* there any way to use the i960 hardware in just one memory op, instead of
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* there any way to use the i960 hardware in just one memory op, instead of
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* two?
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* two?
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*/
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*/
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#define READ_OP(type,name) \
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#define READ_OP(type,name) \
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type name(char* addr) \
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type name(char* addr) \
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{ \
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{ \
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volatile type *local_addr; \
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volatile type *local_addr; \
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type retval; \
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type retval; \
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unsigned long oldatu = *ATU_OIOWVR; \
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unsigned long oldatu = *ATU_OIOWVR; \
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local_addr = (volatile type*) \
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local_addr = (volatile type*) \
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program_atu((unsigned long)addr); \
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program_atu((unsigned long)addr); \
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retval = *local_addr; \
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retval = *local_addr; \
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*ATU_OIOWVR = oldatu; \
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*ATU_OIOWVR = oldatu; \
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return retval; \
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return retval; \
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}
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}
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READ_OP(unsigned char,readb)
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READ_OP(unsigned char,readb)
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READ_OP(unsigned short,readw)
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READ_OP(unsigned short,readw)
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READ_OP(unsigned int,readl)
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READ_OP(unsigned int,readl)
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#undef READ_OP
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#undef READ_OP
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#define WRITE_OP(type,name) \
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#define WRITE_OP(type,name) \
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type name(type val, char* addr) \
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type name(type val, char* addr) \
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{ \
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{ \
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volatile type *local_addr; \
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volatile type *local_addr; \
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type retval; \
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type retval; \
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unsigned long oldatu = *ATU_OIOWVR; \
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unsigned long oldatu = *ATU_OIOWVR; \
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local_addr = (volatile type*) \
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local_addr = (volatile type*) \
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program_atu((unsigned long)addr); \
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program_atu((unsigned long)addr); \
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retval = *local_addr = val; \
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retval = *local_addr = val; \
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*ATU_OIOWVR = oldatu; \
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*ATU_OIOWVR = oldatu; \
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return retval; \
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return retval; \
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}
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}
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WRITE_OP(unsigned char,writeb)
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WRITE_OP(unsigned char,writeb)
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WRITE_OP(unsigned short,writew)
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WRITE_OP(unsigned short,writew)
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WRITE_OP(unsigned int,writel)
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WRITE_OP(unsigned int,writel)
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#undef WRITE_OP
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#undef WRITE_OP
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