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Annotation of qemu/roms/openbios/include/arch/x86/io.h, revision 1.1

1.1     ! root        1: #ifndef _ASM_IO_H
        !             2: #define _ASM_IO_H
        !             3: 
        !             4: #include "asm/types.h"
        !             5: 
        !             6: extern char _start, _end;
        !             7: extern unsigned long virt_offset;
        !             8: 
        !             9: #define phys_to_virt(phys) ((void *) ((unsigned long) (phys) - virt_offset))
        !            10: #define virt_to_phys(virt) ((unsigned long) (virt) + virt_offset)
        !            11: 
        !            12: #ifndef BOOTSTRAP
        !            13: #define __SLOW_DOWN_IO "outb %%al,$0x80;"
        !            14: static inline void slow_down_io(void)
        !            15: {
        !            16:        __asm__ __volatile__(
        !            17:                __SLOW_DOWN_IO
        !            18: #ifdef REALLY_SLOW_IO
        !            19:                __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
        !            20: #endif
        !            21:                : : );
        !            22: }
        !            23: 
        !            24: #define BUILDIO(bwl,bw,type) \
        !            25: static inline void out##bwl(unsigned type value, int port) { \
        !            26:        __asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
        !            27: } \
        !            28: static inline unsigned type in##bwl(int port) { \
        !            29:        unsigned type value; \
        !            30:        __asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
        !            31:        return value; \
        !            32: } \
        !            33: static inline void out##bwl##_p(unsigned type value, int port) { \
        !            34:        out##bwl(value, port); \
        !            35:        slow_down_io(); \
        !            36: } \
        !            37: static inline unsigned type in##bwl##_p(int port) { \
        !            38:        unsigned type value = in##bwl(port); \
        !            39:        slow_down_io(); \
        !            40:        return value; \
        !            41: } \
        !            42: static inline void outs##bwl(int port, const void *addr, unsigned long count) { \
        !            43:        __asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \
        !            44: } \
        !            45: static inline void ins##bwl(int port, void *addr, unsigned long count) { \
        !            46:        __asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \
        !            47: }
        !            48: 
        !            49: #ifndef BOOTSTRAP
        !            50: BUILDIO(b,b,char)
        !            51: BUILDIO(w,w,short)
        !            52: BUILDIO(l,,int)
        !            53: #endif
        !            54: 
        !            55: #else /* BOOTSTRAP */
        !            56: #ifdef FCOMPILER
        !            57: #define inb(reg) ((u8)0xff)
        !            58: #define inw(reg) ((u16)0xffff)
        !            59: #define inl(reg) ((u32)0xffffffff)
        !            60: #define outb(reg, val) do{} while(0)
        !            61: #define outw(reg, val) do{} while(0)
        !            62: #define outl(reg, val) do{} while(0)
        !            63: #else
        !            64: extern u8 inb(u32 reg);
        !            65: extern u16 inw(u32 reg);
        !            66: extern u32 inl(u32 reg);
        !            67: extern void insw(u32 reg, void *addr, unsigned long count);
        !            68: extern void outb(u32 reg, u8 val);
        !            69: extern void outw(u32 reg, u16 val);
        !            70: extern void outl(u32 reg, u32 val);
        !            71: extern void outsw(u32 reg, const void *addr, unsigned long count);
        !            72: #endif
        !            73: #endif
        !            74: #endif

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