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#ifndef _ASM_IO_H

#define _ASM_IO_H

#include <linux/config.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

 */

 /*

  *  Bit simplified and optimized by Jan Hubicka

  *  Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.

  *

  *  isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added,

  *  isa_read[wl] and isa_write[wl] fixed

  *  - Arnaldo Carvalho de Melo <acme@conectiva.com.br>

  */

#ifdef SLOW_IO_BY_JUMPING

#define __SLOW_DOWN_IO "\njmp 1f\n1:\tjmp 1f\n1:"

#else

#define __SLOW_DOWN_IO "\noutb %%al,$0x80"

#endif

#ifdef REALLY_SLOW_IO

#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO

#else

#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO

#endif

/*

 * 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), "Nd" (port)); } \

__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \

#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) : "Nd" (port) ,##i ); return _v; } \

__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \

#define __INS(s) \

extern inline void ins##s(unsigned short port, void * addr, unsigned long count) \

{ __asm__ __volatile__ ("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__ ("rep ; outs" #s \

: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); }

#define RETURN_TYPE unsigned char

__IN(b,"")

#undef RETURN_TYPE

#define RETURN_TYPE unsigned short

__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)

#define IO_SPACE_LIMIT 0xffff

#ifdef __KERNEL__

#include <linux/vmalloc.h>

/*

 * Temporary debugging check to catch old code using

 * unmapped ISA addresses. Will be removed in 2.4.

 */

#ifdef CONFIG_IO_DEBUG

  extern void *__io_virt_debug(unsigned long x, const char *file, int line);

  extern unsigned long __io_phys_debug(unsigned long x, const char *file, int line);

  #define __io_virt(x) __io_virt_debug((unsigned long)(x), __FILE__, __LINE__)

//#define __io_phys(x) __io_phys_debug((unsigned long)(x), __FILE__, __LINE__)

#else

  #define __io_virt(x) ((void *)(x))

//#define __io_phys(x) __pa(x)

#endif

/*

 * Change virtual addresses to physical addresses and vv.

 * These are pretty trivial

 */

extern inline unsigned long virt_to_phys(volatile void * address)

{

        return __pa(address);

}

extern inline void * phys_to_virt(unsigned long address)

{

        return __va(address);

}

/*

 * Change "struct page" to physical address.

 */

#ifdef CONFIG_DISCONTIGMEM

#include <asm/mmzone.h>

#else

#define page_to_phys(page)      (((page) - mem_map) << PAGE_SHIFT)

#endif

extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);

extern inline void * ioremap (unsigned long offset, unsigned long size)

{

        return __ioremap(offset, size, 0);

}

/*

 * This one maps high address device memory and turns off caching for that area.

 * it's useful if some control registers are in such an area and write combining

 * or read caching is not desirable:

 */

extern inline void * ioremap_nocache (unsigned long offset, unsigned long size)

{

        return __ioremap(offset, size, _PAGE_PCD);

}

extern void iounmap(void *addr);

/*

 * 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

#define page_to_bus page_to_phys

/*

 * 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 *) __io_virt(addr))

#define readw(addr) (*(volatile unsigned short *) __io_virt(addr))

#define readl(addr) (*(volatile unsigned int *) __io_virt(addr))

#define readq(addr) (*(volatile unsigned long *) __io_virt(addr))

#define __raw_readb readb

#define __raw_readw readw

#define __raw_readl readl

#define __raw_readq readq

#define writeb(b,addr) (*(volatile unsigned char *) __io_virt(addr) = (b))

#define writew(b,addr) (*(volatile unsigned short *) __io_virt(addr) = (b))

#define writel(b,addr) (*(volatile unsigned int *) __io_virt(addr) = (b))

#define writeq(b,addr) (*(volatile unsigned long *) __io_virt(addr) = (b))

#define __raw_writeb writeb

#define __raw_writew writew

#define __raw_writel writel

#define __raw_writeq writeq

void *memcpy_fromio(void*,const void*,unsigned);

void *memcpy_toio(void*,const void*,unsigned);

#define memset_io(a,b,c)        memset(__io_virt(a),(b),(c))

/*

 * ISA space is 'always mapped' on a typical x86 system, no need to

 * explicitly ioremap() it. The fact that the ISA IO space is mapped

 * to PAGE_OFFSET is pure coincidence - it does not mean ISA values

 * are physical addresses. The following constant pointer can be

 * used as the IO-area pointer (it can be iounmapped as well, so the

 * analogy with PCI is quite large):

 */

#define __ISA_IO_base ((char *)(PAGE_OFFSET))

#define isa_readb(a) readb(__ISA_IO_base + (a))

#define isa_readw(a) readw(__ISA_IO_base + (a))

#define isa_readl(a) readl(__ISA_IO_base + (a))

#define isa_writeb(b,a) writeb(b,__ISA_IO_base + (a))

#define isa_writew(w,a) writew(w,__ISA_IO_base + (a))

#define isa_writel(l,a) writel(l,__ISA_IO_base + (a))

#define isa_memset_io(a,b,c)            memset_io(__ISA_IO_base + (a),(b),(c))

#define isa_memcpy_fromio(a,b,c)        memcpy_fromio((a),__ISA_IO_base + (b),(c))

#define isa_memcpy_toio(a,b,c)          memcpy_toio(__ISA_IO_base + (a),(b),(c))

/*

 * Again, x86-64 does not require mem IO specific function.

 */

#define eth_io_copy_and_sum(a,b,c,d)            eth_copy_and_sum((a),__io_virt(b),(c),(d))

#define isa_eth_io_copy_and_sum(a,b,c,d)        eth_copy_and_sum((a),__io_virt(__ISA_IO_base + (b)),(c),(d))

static inline int check_signature(unsigned long io_addr,

        const unsigned char *signature, int length)

{

        int retval = 0;

        do {

                if (readb(io_addr) != *signature)

                        goto out;

                io_addr++;

                signature++;

                length--;

        } while (length);

        retval = 1;

out:

        return retval;

}

static inline int isa_check_signature(unsigned long io_addr,

        const unsigned char *signature, int length)

{

        int retval = 0;

        do {

                if (isa_readb(io_addr) != *signature)

                        goto out;

                io_addr++;

                signature++;

                length--;

        } while (length);

        retval = 1;

out:

        return retval;

}

/* Nothing to do */

#define dma_cache_inv(_start,_size)             do { } while (0)

#define dma_cache_wback(_start,_size)           do { } while (0)

#define dma_cache_wback_inv(_start,_size)       do { } while (0)

#define flush_write_buffers() 

#endif /* __KERNEL__ */

#endif