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https://gitlab.com/qemu-project/openbios.git
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2eaec36c50
git-svn-id: svn://coreboot.org/openbios/openbios-devel@28 f158a5a8-5612-0410-a976-696ce0be7e32
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
#ifndef _ASM_IO_H
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#define _ASM_IO_H
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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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#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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#endif
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