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Diffstat (limited to 'gpxe/src/arch/i386/include/io.h')
| -rw-r--r-- | gpxe/src/arch/i386/include/io.h | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/gpxe/src/arch/i386/include/io.h b/gpxe/src/arch/i386/include/io.h deleted file mode 100644 index c26fdf7e..00000000 --- a/gpxe/src/arch/i386/include/io.h +++ /dev/null @@ -1,265 +0,0 @@ -#ifndef ETHERBOOT_IO_H -#define ETHERBOOT_IO_H - -#include <stdint.h> -#include "virtaddr.h" - -/* virt_to_bus converts an addresss inside of etherboot [_start, _end] - * into a memory access cards can use. - */ -#define virt_to_bus virt_to_phys - - -/* bus_to_virt reverses virt_to_bus, the address must be output - * from virt_to_bus to be valid. This function does not work on - * all bus addresses. - */ -#define bus_to_virt phys_to_virt - -/* ioremap converts a random 32bit bus address into something - * etherboot can access. - */ -static inline void *ioremap(unsigned long bus_addr, unsigned long length __unused) -{ - return bus_to_virt(bus_addr); -} - -/* iounmap cleans up anything ioremap had to setup */ -static inline void iounmap(void *virt_addr __unused) -{ - return; -} - -/* - * 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 - -/* - * 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. - */ -static inline __attribute__ (( always_inline )) unsigned long -_readb ( volatile uint8_t *addr ) { - unsigned long data = *addr; - DBGIO ( "[%08lx] => %02lx\n", virt_to_phys ( addr ), data ); - return data; -} -static inline __attribute__ (( always_inline )) unsigned long -_readw ( volatile uint16_t *addr ) { - unsigned long data = *addr; - DBGIO ( "[%08lx] => %04lx\n", virt_to_phys ( addr ), data ); - return data; -} -static inline __attribute__ (( always_inline )) unsigned long -_readl ( volatile uint32_t *addr ) { - unsigned long data = *addr; - DBGIO ( "[%08lx] => %08lx\n", virt_to_phys ( addr ), data ); - return data; -} -#define readb( addr ) _readb ( ( volatile uint8_t * ) (addr) ) -#define readw( addr ) _readw ( ( volatile uint16_t * ) (addr) ) -#define readl( addr ) _readl ( ( volatile uint32_t * ) (addr) ) - -static inline __attribute__ (( always_inline )) void -_writeb ( unsigned long data, volatile uint8_t *addr ) { - DBGIO ( "[%08lx] <= %02lx\n", virt_to_phys ( addr ), data ); - *addr = data; -} -static inline __attribute__ (( always_inline )) void -_writew ( unsigned long data, volatile uint16_t *addr ) { - DBGIO ( "[%08lx] <= %04lx\n", virt_to_phys ( addr ), data ); - *addr = data; -} -static inline __attribute__ (( always_inline )) void -_writel ( unsigned long data, volatile uint32_t *addr ) { - DBGIO ( "[%08lx] <= %08lx\n", virt_to_phys ( addr ), data ); - *addr = data; -} -#define writeb( b, addr ) _writeb ( (b), ( volatile uint8_t * ) (addr) ) -#define writew( b, addr ) _writew ( (b), ( volatile uint16_t * ) (addr) ) -#define writel( b, addr ) _writel ( (b), ( volatile uint32_t * ) (addr) ) - -#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) -#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) - -/* - * Force strict CPU ordering. - * And yes, this is required on UP too when we're talking - * to devices. - * - * For now, "wmb()" doesn't actually do anything, as all - * Intel CPU's follow what Intel calls a *Processor Order*, - * in which all writes are seen in the program order even - * outside the CPU. - * - * I expect future Intel CPU's to have a weaker ordering, - * but I'd also expect them to finally get their act together - * and add some real memory barriers if so. - * - * Some non intel clones support out of order store. wmb() ceases to be a - * nop for these. - */ - -#define mb() __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory") -#define rmb() mb() -#define wmb() mb(); - - -/* - * Talk about misusing macros.. - */ - -#define __OUT1(s,x) \ -extern void __out##s(unsigned x value, unsigned short port); \ -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,x) \ -extern unsigned x __in##s(unsigned short port); \ -extern inline unsigned x __in##s(unsigned short port) { unsigned x _v; - -#define __IN2(s,s1,s2) \ -__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0" - -#define __IN(s,s1,x,i...) \ -__IN1(s,x) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); return _v; } \ -__IN1(s##c,x) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); return _v; } \ -__IN1(s##_p,x) __IN2(s,s1,"w") : "=a" (_v) : "d" (port) ,##i ); SLOW_DOWN_IO; return _v; } \ -__IN1(s##c_p,x) __IN2(s,s1,"") : "=a" (_v) : "id" (port) ,##i ); SLOW_DOWN_IO; return _v; } - -#define __INS(s) \ -extern void ins##s(unsigned short port, void * addr, unsigned long count); \ -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 void outs##s(unsigned short port, const void * addr, unsigned long count); \ -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)); } - -__IN(b,"", char) -__IN(w,"",short) -__IN(l,"", long) - -__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 /* ETHERBOOT_IO_H */ |