From 86297c41a26f18d924e64fc93321c59cbc4c48dd Mon Sep 17 00:00:00 2001 From: Thomas Bushnell Date: Mon, 26 Apr 1999 05:58:44 +0000 Subject: 1998-11-30 OKUJI Yoshinori Clean up linux emulation code to make it architecture-independent as much as possible. * linux: Renamed from linuxdev. * Makefile.in (objfiles): Add linux.o instead of linuxdev.o. (MAKE): New variable. Used for the linux.o target. * configure.in: Add AC_CHECK_TOOL(MAKE, make). * i386/i386/spl.h: Include , for compatibility with OSF Mach 3.0. Suggested by Elgin Lee . * linux/src: Renamed from linux/linux. * linux/dev: Renamed from linux/mach. * linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h, instead of mach/include/linux/autoconf.h. * Makefile.in (all): Target ../linux.o instead of ../linuxdev.o. * linux/dev/drivers/block/genhd.c: Include instead of . * linux/dev/drivers/net/auto_irq.c: Remove unneeded header files, and . * linux/dev/init/main.c: Many i386-dependent codes moved to ... * linux/dev/arch/i386/irq.c: ... here. * linux/dev/arch/i386/setup.c: New file. * linux/dev/arch/i386/linux_emul.h: Likewise. * linux/dev/arch/i386/glue/timer.c: Merged into sched.c. * linux/dev/arch/i386/glue/sched.c: Include instead of , and moved to ... * linux/dev/kernel/sched.c: ... here. * linux/dev/arch/i386/glue/block.c: Include and , instead of i386-dependent header files, and moved to ... * linux/dev/glue/blocl.c: ... here. * linux/dev/arch/i386/glue/net.c: Include and , instead of i386-dependent header files, and moved to ... * linux/dev/glue/net.c: ... here. * linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ... * linux/dev/glue/misc.c: ... here. * linux/dev/arch/i386/glue/kmem.c: Moved to ... * linux/dev/glue/kmem.c: ... here. --- linux/src/include/asm-i386/io.h | 213 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 213 insertions(+) create mode 100644 linux/src/include/asm-i386/io.h (limited to 'linux/src/include/asm-i386/io.h') diff --git a/linux/src/include/asm-i386/io.h b/linux/src/include/asm-i386/io.h new file mode 100644 index 0000000..98e32ce --- /dev/null +++ b/linux/src/include/asm-i386/io.h @@ -0,0 +1,213 @@ +#ifndef _ASM_IO_H +#define _ASM_IO_H + +/* + * This file contains the definitions for the x86 IO instructions + * inb/inw/inl/outb/outw/outl and the "string versions" of the same + * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing" + * versions of the single-IO instructions (inb_p/inw_p/..). + * + * This file is not meant to be obfuscating: it's just complicated + * to (a) handle it all in a way that makes gcc able to optimize it + * as well as possible and (b) trying to avoid writing the same thing + * over and over again with slight variations and possibly making a + * mistake somewhere. + */ + +/* + * Thanks to James van Artsdalen for a better timing-fix than + * the two short jumps: using outb's to a nonexistent port seems + * to guarantee better timings even on fast machines. + * + * On the other hand, I'd like to be sure of a non-existent port: + * I feel a bit unsafe about using 0x80 (should be safe, though) + * + * Linus + */ + +#ifdef SLOW_IO_BY_JUMPING +#define __SLOW_DOWN_IO __asm__ __volatile__("jmp 1f\n1:\tjmp 1f\n1:") +#else +#define __SLOW_DOWN_IO __asm__ __volatile__("outb %al,$0x80") +#endif + +#ifdef REALLY_SLOW_IO +#define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; } +#else +#define SLOW_DOWN_IO __SLOW_DOWN_IO +#endif + +/* + * Change virtual addresses to physical addresses and vv. + * These are trivial on the 1:1 Linux/i386 mapping (but if we ever + * make the kernel segment mapped at 0, we need to do translation + * on the i386 as well) + */ +extern inline unsigned long virt_to_phys(volatile void * address) +{ + return (unsigned long) address; +} + +extern inline void * phys_to_virt(unsigned long address) +{ + return (void *) address; +} + +/* + * IO bus memory addresses are also 1:1 with the physical address + */ +#define virt_to_bus virt_to_phys +#define bus_to_virt phys_to_virt + +/* + * readX/writeX() are used to access memory mapped devices. On some + * architectures the memory mapped IO stuff needs to be accessed + * differently. On the x86 architecture, we just read/write the + * memory location directly. + */ +#define readb(addr) (*(volatile unsigned char *) (addr)) +#define readw(addr) (*(volatile unsigned short *) (addr)) +#define readl(addr) (*(volatile unsigned int *) (addr)) + +#define writeb(b,addr) ((*(volatile unsigned char *) (addr)) = (b)) +#define writew(b,addr) ((*(volatile unsigned short *) (addr)) = (b)) +#define writel(b,addr) ((*(volatile unsigned int *) (addr)) = (b)) + +#define memset_io(a,b,c) memset((void *)(a),(b),(c)) +#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) +#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) + +/* + * Again, i386 does not require mem IO specific function. + */ + +#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(b),(c),(d)) + +/* + * Talk about misusing macros.. + */ + +#define __OUT1(s,x) \ +extern inline void __out##s(unsigned x value, unsigned short port) { + +#define __OUT2(s,s1,s2) \ +__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1" + +#define __OUT(s,s1,x) \ +__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); } \ +__OUT1(s##c,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); } \ +__OUT1(s##_p,x) __OUT2(s,s1,"w") : : "a" (value), "d" (port)); SLOW_DOWN_IO; } \ +__OUT1(s##c_p,x) __OUT2(s,s1,"") : : "a" (value), "id" (port)); SLOW_DOWN_IO; } + +#define __IN1(s) \ +extern inline RETURN_TYPE __in##s(unsigned short port) { RETURN_TYPE _v; + +#define __IN2(s,s1,s2) \ +__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0" + +#define __IN(s,s1,i...) \ +__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); return _v; } \ +__IN1(s##c) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); return _v; } \ +__IN1(s##_p) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); SLOW_DOWN_IO; return _v; } \ +__IN1(s##c_p) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); SLOW_DOWN_IO; return _v; } + +#define __INS(s) \ +extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \ +{ __asm__ __volatile__ ("cld ; rep ; ins" #s \ +: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); } + +#define __OUTS(s) \ +extern inline void outs##s(unsigned short port, const void * addr, unsigned long count) \ +{ __asm__ __volatile__ ("cld ; rep ; outs" #s \ +: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); } + +#define RETURN_TYPE unsigned char +/* __IN(b,"b","0" (0)) */ +__IN(b,"") +#undef RETURN_TYPE +#define RETURN_TYPE unsigned short +/* __IN(w,"w","0" (0)) */ +__IN(w,"") +#undef RETURN_TYPE +#define RETURN_TYPE unsigned int +__IN(l,"") +#undef RETURN_TYPE + +__OUT(b,"b",char) +__OUT(w,"w",short) +__OUT(l,,int) + +__INS(b) +__INS(w) +__INS(l) + +__OUTS(b) +__OUTS(w) +__OUTS(l) + +/* + * Note that due to the way __builtin_constant_p() works, you + * - can't use it inside a inline function (it will never be true) + * - you don't have to worry about side effects within the __builtin.. + */ +#define outb(val,port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __outbc((val),(port)) : \ + __outb((val),(port))) + +#define inb(port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __inbc(port) : \ + __inb(port)) + +#define outb_p(val,port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __outbc_p((val),(port)) : \ + __outb_p((val),(port))) + +#define inb_p(port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __inbc_p(port) : \ + __inb_p(port)) + +#define outw(val,port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __outwc((val),(port)) : \ + __outw((val),(port))) + +#define inw(port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __inwc(port) : \ + __inw(port)) + +#define outw_p(val,port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __outwc_p((val),(port)) : \ + __outw_p((val),(port))) + +#define inw_p(port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __inwc_p(port) : \ + __inw_p(port)) + +#define outl(val,port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __outlc((val),(port)) : \ + __outl((val),(port))) + +#define inl(port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __inlc(port) : \ + __inl(port)) + +#define outl_p(val,port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __outlc_p((val),(port)) : \ + __outl_p((val),(port))) + +#define inl_p(port) \ +((__builtin_constant_p((port)) && (port) < 256) ? \ + __inlc_p(port) : \ + __inl_p(port)) + +#endif -- cgit v1.2.3