72 lines
2 KiB
C
72 lines
2 KiB
C
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#ifndef _ASM_IO_H
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#define _ASM_IO_H
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extern char _start, _end;
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extern unsigned long virt_offset;
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#define phys_to_virt(phys) ((void *) ((unsigned long) (phys) - virt_offset))
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#define virt_to_phys(virt) ((unsigned long) (virt) + virt_offset)
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#ifndef BOOTSTRAP
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#define __SLOW_DOWN_IO "outb %%al,$0x80;"
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static inline void slow_down_io(void)
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{
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__asm__ __volatile__(
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__SLOW_DOWN_IO
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#ifdef REALLY_SLOW_IO
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__SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO
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#endif
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: : );
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}
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#define BUILDIO(bwl,bw,type) \
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static inline void out##bwl(unsigned type value, int port) { \
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__asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
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} \
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static inline unsigned type in##bwl(int port) { \
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unsigned type value; \
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__asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
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return value; \
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} \
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static inline void out##bwl##_p(unsigned type value, int port) { \
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out##bwl(value, port); \
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slow_down_io(); \
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} \
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static inline unsigned type in##bwl##_p(int port) { \
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unsigned type value = in##bwl(port); \
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slow_down_io(); \
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return value; \
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} \
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static inline void outs##bwl(int port, const void *addr, unsigned long count) { \
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__asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \
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} \
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static inline void ins##bwl(int port, void *addr, unsigned long count) { \
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__asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \
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}
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BUILDIO(b,b,char)
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BUILDIO(w,w,short)
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BUILDIO(l,,int)
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#else /* BOOTSTRAP */
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#ifdef FCOMPILER
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#define inb(reg) ((u8)0xff)
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#define inw(reg) ((u16)0xffff)
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#define inl(reg) ((u32)0xffffffff)
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#define outb(reg, val) do{} while(0)
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#define outw(reg, val) do{} while(0)
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#define outl(reg, val) do{} while(0)
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#else
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extern u8 inb(u32 reg);
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extern u16 inw(u32 reg);
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extern u32 inl(u32 reg);
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extern void insw(u32 reg, void *addr, unsigned long count);
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extern void outb(u32 reg, u8 val);
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extern void outw(u32 reg, u16 val);
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extern void outl(u32 reg, u32 val);
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extern void outsw(u32 reg, const void *addr, unsigned long count);
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#endif
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#endif
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#endif
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