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[/] [or1k/] [tags/] [before_ORP/] [uclinux/] [uClinux-2.0.x/] [include/] [asm-alpha/] [jensen.h] - Rev 199
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#ifndef __ALPHA_JENSEN_H #define __ALPHA_JENSEN_H /* * Defines for the AlphaPC EISA IO and memory address space. */ /* * NOTE! The memory operations do not set any memory barriers, as it's * not needed for cases like a frame buffer that is essentially memory-like. * You need to do them by hand if the operations depend on ordering. * * Similarly, the port IO operations do a "mb" only after a write operation: * if an mb is needed before (as in the case of doing memory mapped IO * first, and then a port IO operation to the same device), it needs to be * done by hand. * * After the above has bitten me 100 times, I'll give up and just do the * mb all the time, but right now I'm hoping this will work out. Avoiding * mb's may potentially be a noticeable speed improvement, but I can't * honestly say I've tested it. * * Handling interrupts that need to do mb's to synchronize to non-interrupts * is another fun race area. Don't do it (because if you do, I'll have to * do *everything* with interrupts disabled, ugh). */ /* * EISA Interrupt Acknowledge address */ #define EISA_INTA (IDENT_ADDR + 0x100000000UL) /* * FEPROM addresses */ #define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL) #define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL) /* * VL82C106 base address */ #define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL) /* * EISA "Host Address Extension" address (bits 25-31 of the EISA address) */ #define EISA_HAE (IDENT_ADDR + 0x1D0000000UL) /* * "SYSCTL" register address */ #define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL) /* * "spare" register address */ #define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL) /* * EISA memory address offset */ #define EISA_MEM (IDENT_ADDR + 0x200000000UL) /* * EISA IO address offset */ #define EISA_IO (IDENT_ADDR + 0x300000000UL) /* * Change virtual addresses to bus addresses and vv. * * NOTE! On the Jensen, the physical address is the same * as the bus address, but this is not necessarily true on * other alpha hardware. */ #define virt_to_bus virt_to_phys #define bus_to_virt phys_to_virt #define HAE_ADDRESS EISA_HAE /* * Handle the "host address register". This needs to be set * to the high 7 bits of the EISA address. This is also needed * for EISA IO addresses, which are only 16 bits wide (the * hae needs to be set to 0). * * HAE isn't needed for the local IO operations, though. */ #define __HAE_MASK 0x1ffffff extern inline void __set_hae(unsigned long addr) { /* hae on the Jensen is bits 31:25 shifted right */ addr >>= 25; if (addr != hae.cache) set_hae(addr); } /* * IO functions * * The "local" functions are those that don't go out to the EISA bus, * but instead act on the VL82C106 chip directly.. This is mainly the * keyboard, RTC, printer and first two serial lines.. * * The local stuff makes for some complications, but it seems to be * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H * convinced that I need one of the newer machines. */ extern inline unsigned int __local_inb(unsigned long addr) { long result = *(volatile int *) ((addr << 9) + EISA_VL82C106); return 0xffUL & result; } extern inline void __local_outb(unsigned char b, unsigned long addr) { *(volatile unsigned int *) ((addr << 9) + EISA_VL82C106) = b; mb(); } extern unsigned int _bus_inb(unsigned long addr); extern inline unsigned int __bus_inb(unsigned long addr) { long result; __set_hae(0); result = *(volatile int *) ((addr << 7) + EISA_IO + 0x00); result >>= (addr & 3) * 8; return 0xffUL & result; } extern void _bus_outb(unsigned char b, unsigned long addr); extern inline void __bus_outb(unsigned char b, unsigned long addr) { __set_hae(0); *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x00) = b * 0x01010101; mb(); } /* * It seems gcc is not very good at optimizing away logical * operations that result in operations across inline functions. * Which is why this is a macro. */ #define __is_local(addr) ( \ /* keyboard */ (addr == 0x60 || addr == 0x64) || \ /* RTC */ (addr == 0x170 || addr == 0x171) || \ /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \ /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \ /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff)) extern inline unsigned int __inb(unsigned long addr) { if (__is_local(addr)) return __local_inb(addr); return _bus_inb(addr); } extern inline void __outb(unsigned char b, unsigned long addr) { if (__is_local(addr)) __local_outb(b, addr); else _bus_outb(b, addr); } extern inline unsigned int __inw(unsigned long addr) { long result; __set_hae(0); result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20); result >>= (addr & 3) * 8; return 0xffffUL & result; } extern inline unsigned int __inl(unsigned long addr) { __set_hae(0); return *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x60); } extern inline void __outw(unsigned short b, unsigned long addr) { __set_hae(0); *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001; mb(); } extern inline void __outl(unsigned int b, unsigned long addr) { __set_hae(0); *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x60) = b; mb(); } /* * Memory functions. */ extern inline unsigned long __readb(unsigned long addr) { long result; __set_hae(addr); addr &= __HAE_MASK; result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00); result >>= (addr & 3) * 8; return 0xffUL & result; } extern inline unsigned long __readw(unsigned long addr) { long result; __set_hae(addr); addr &= __HAE_MASK; result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20); result >>= (addr & 3) * 8; return 0xffffUL & result; } extern inline unsigned long __readl(unsigned long addr) { __set_hae(addr); addr &= __HAE_MASK; return *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x60); } extern inline void __writeb(unsigned short b, unsigned long addr) { __set_hae(addr); addr &= __HAE_MASK; *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101; } extern inline void __writew(unsigned short b, unsigned long addr) { __set_hae(addr); addr &= __HAE_MASK; *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001; } extern inline void __writel(unsigned int b, unsigned long addr) { __set_hae(addr); addr &= __HAE_MASK; *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x60) = b; } /* * The above have so much overhead that it probably doesn't make * sense to have them inlined (better icache behaviour). */ #define inb(port) \ (__builtin_constant_p((port))?__inb(port):_inb(port)) #define outb(x, port) \ (__builtin_constant_p((port))?__outb((x),(port)):_outb((x),(port))) /* * The Alpha Jensen hardware for some rather strange reason puts * the RTC clock at 0x170 instead of 0x70. Probably due to some * misguided idea about using 0x70 for NMI stuff. * * These defines will override the defaults when doing RTC queries */ #define RTC_PORT(x) (0x170+(x)) #define RTC_ADDR(x) (x) #define RTC_ALWAYS_BCD 0 #endif
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