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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 629 | giacomo | 1 | #ifndef __IO__ |
| 2 | #define __IO__ |
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| 3 | |||
| 4 | #include <linux/compatib.h> |
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| 5 | #include "ll/sys/cdefs.h" |
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| 6 | |||
| 7 | __BEGIN_DECLS |
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| 8 | |||
| 9 | /* |
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| 10 | * Thanks to James van Artsdalen for a better timing-fix than |
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| 11 | * the two short jumps: using outb's to a nonexistent port seems |
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| 12 | * to guarantee better timings even on fast machines. |
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| 13 | * |
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| 14 | * On the other hand, I'd like to be sure of a non-existent port: |
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| 15 | * I feel a bit unsafe about using 0x80 (should be safe, though) |
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| 16 | * |
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| 17 | * Linus |
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| 18 | */ |
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| 19 | |||
| 20 | #ifdef SLOW_IO_BY_JUMPING |
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| 21 | #define __SLOW_DOWN_IO __asm__ __volatile__("jmp 1f\n1:\tjmp 1f\n1:") |
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| 22 | #else |
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| 23 | #define __SLOW_DOWN_IO __asm__ __volatile__("outb %al,$0x80") |
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| 24 | #endif |
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| 25 | |||
| 26 | #ifdef REALLY_SLOW_IO |
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| 27 | #define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; } |
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| 28 | #else |
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| 29 | #define SLOW_DOWN_IO __SLOW_DOWN_IO |
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| 30 | #endif |
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| 31 | |||
| 32 | |||
| 33 | #define __INS(s) \ |
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| 34 | extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \ |
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| 35 | { __asm__ __volatile__ ("cld ; rep ; ins" #s \ |
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| 36 | : "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); } |
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| 37 | __INS(b) |
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| 38 | __INS(w) |
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| 39 | __INS(l) |
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| 40 | |||
| 41 | #define __OUTS(s) \ |
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| 42 | extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \ |
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| 43 | { __asm__ __volatile__ ("cld ; rep ; outs" #s \ |
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| 44 | : "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); } |
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| 45 | __OUTS(b) |
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| 46 | __OUTS(w) |
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| 47 | __OUTS(l) |
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| 48 | |||
| 49 | /* Traslation from virtual to phisical address...*/ |
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| 50 | /* from asm/io.h */ |
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| 51 | |||
| 52 | #define __io_virt(x) ((void *)(x)) |
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| 53 | |||
| 54 | extern inline void * phys_to_virt(unsigned long address) |
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| 55 | { |
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| 56 | return __io_virt(address); |
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| 57 | } |
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| 58 | |||
| 59 | |||
| 60 | extern __inline__ DWORD virt_to_phys(volatile void * address) |
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| 61 | { |
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| 62 | return (DWORD)address; |
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| 63 | } |
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| 64 | |||
| 65 | #define bus_to_virt phys_to_virt |
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| 66 | #define virt_to_bus virt_to_phys |
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| 67 | |||
| 68 | |||
| 69 | #define readb(addr) (*(volatile unsigned char *) __io_virt(addr)) |
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| 70 | #define readw(addr) (*(volatile unsigned short *) __io_virt(addr)) |
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| 71 | #define readl(addr) (*(volatile unsigned int *) __io_virt(addr)) |
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| 72 | |||
| 73 | #define writeb(b,addr) (*(volatile unsigned char *) __io_virt(addr) = (b)) |
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| 74 | #define writew(b,addr) (*(volatile unsigned short *) __io_virt(addr) = (b)) |
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| 75 | #define writel(b,addr) (*(volatile unsigned int *) __io_virt(addr) = (b)) |
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| 76 | |||
| 77 | __END_DECLS |
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| 78 | #endif |