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94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
#ifndef _ASM_IO_H
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#define _ASM_IO_H
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/*
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* This file contains parts of Linux's /usr/include/asm/io.h, but
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* with the argument order reversed for outb, outb_p, outw, outw_p.
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*/
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#define SLOW_DOWN_IO __asm__ __volatile__("outb %al,$0x80")
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#define __OUT1(s,x) \
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extern inline void __out##s(unsigned x value, unsigned short port); \
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extern inline void __out##s(unsigned x value, unsigned short port) {
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#define __OUT2(s,s1,s2) \
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__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
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#define __OUT(s,s1,x) \
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__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); } \
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__OUT1(s##c,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); } \
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__OUT1(s##_p,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); SLOW_DOWN_IO; } \
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__OUT1(s##c_p,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); SLOW_DOWN_IO; }
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#define __IN1(s) \
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extern inline RETURN_TYPE __in##s(unsigned short port); \
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extern inline RETURN_TYPE __in##s(unsigned short port) { RETURN_TYPE _v;
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#define __IN2(s,s1,s2) \
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__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
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#define __IN(s,s1,i...) \
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__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); return _v; } \
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__IN1(s##c) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); return _v; } \
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__IN1(s##_p) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); SLOW_DOWN_IO; return _v; } \
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__IN1(s##c_p) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); SLOW_DOWN_IO; return _v; }
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#define RETURN_TYPE unsigned char
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/* __IN(b,"b","0" (0)) */
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__IN(b,"")
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#undef RETURN_TYPE
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#define RETURN_TYPE unsigned short
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/* __IN(w,"w","0" (0)) */
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__IN(w,"")
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#undef RETURN_TYPE
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#define RETURN_TYPE unsigned int
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__IN(l,"")
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#undef RETURN_TYPE
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__OUT(b,"b",char)
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__OUT(w,"w",short)
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__OUT(l,,int)
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#define outb(port,val) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__outbc((val),(port)) : \
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__outb((val),(port)))
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#define inb(port) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__inbc(port) : \
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__inb(port))
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#define outb_p(port,val) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__outbc_p((val),(port)) : \
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__outb_p((val),(port)))
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#define inb_p(port) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__inbc_p(port) : \
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__inb_p(port))
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#define outw(port,val) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__outwc((val),(port)) : \
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__outw((val),(port)))
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#define inw(port) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__inwc(port) : \
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__inw(port))
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#define outw_p(port,val) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__outwc_p((val),(port)) : \
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__outw_p((val),(port)))
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#define inw_p(port) \
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((__builtin_constant_p((port)) && (port) < 256) ? \
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__inwc_p(port) : \
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__inw_p(port))
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#endif
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