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#ifndef __ASM_MIPS_IO_H

#define __ASM_MIPS_IO_H

#include <asm/mipsconfig.h>

#include <asm/segment.h>

/*

 * This file contains the definitions for the MIPS counterpart of the

 * x86 in/out instructions. This heap of macros and C results in much

 * better code than the approach of doing it in plain C, though that's

 * probably not needed.

 *

 *   Ralf

 *

 * 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

 */

#define __SLOW_DOWN_IO \

        __asm__ __volatile__( \

                "sb\t$0,0x80(%0)" \

                : : "r" (PORT_BASE));

#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/MIPS mapping

 */

extern inline unsigned long virt_to_phys(volatile void * address)

{

        return (unsigned long) address - KSEG0;

}

extern inline void * phys_to_virt(unsigned long address)

{

        return (void *) address + KSEG0;

}

/*

 * IO bus memory addresses are also 1:1 with the physical address

 * FIXME: This assumption is wrong for the Deskstation Tyne

 */

#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, MIPS 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) \

extern inline void __out##s(unsigned int value, unsigned int port) {

#define __OUT2(m) \

__asm__ __volatile__ ("s" #m "\t%0,%1(%2)"

#define __OUT(m,s) \

__OUT1(s) __OUT2(m) : : "r" (value), "i" (0), "r" (PORT_BASE+port)); } \

__OUT1(s##c) __OUT2(m) : : "r" (value), "ir" (port), "r" (PORT_BASE)); } \

__OUT1(s##_p) __OUT2(m) : : "r" (value), "i" (0), "r" (PORT_BASE+port)); \

        SLOW_DOWN_IO; } \

__OUT1(s##c_p) __OUT2(m) : : "r" (value), "ir" (port), "r" (PORT_BASE)); \

        SLOW_DOWN_IO; }

#define __IN1(t,s) \

extern __inline__ t __in##s(unsigned int port) { t _v;

/*

 * Useless nops will be removed by the assembler

 */

#define __IN2(m) \

__asm__ __volatile__ ("l" #m "u\t%0,%1(%2)\n\tnop"

#define __IN(t,m,s) \

__IN1(t,s) __IN2(m) : "=r" (_v) : "i" (0), "r" (PORT_BASE+port)); return _v; } \

__IN1(t,s##c) __IN2(m) : "=r" (_v) : "ir" (port), "r" (PORT_BASE)); return _v; } \

__IN1(t,s##_p) __IN2(m) : "=r" (_v) : "i" (0), "r" (PORT_BASE+port)); SLOW_DOWN_IO; return _v; } \

__IN1(t,s##c_p) __IN2(m) : "=r" (_v) : "ir" (port), "r" (PORT_BASE)); SLOW_DOWN_IO; return _v; }

#define __INS1(s) \

extern inline void __ins##s(unsigned int port, void * addr, unsigned long count) {

#define __INS2(m) \

__asm__ __volatile__ ( \

        ".set\tnoreorder\n\t" \

        ".set\tnoat\n" \

        "1:\tl" #m "u\t$1,%4(%5)\n\t" \

        "subu\t%1,1\n\t" \

        "s" #m "\t$1,(%0)\n\t" \

        "bne\t$0,%1,1b\n\t" \

        "addiu\t%0,%6\n\t" \

        ".set\tat\n\t" \

        ".set\treorder"

#define __INS(m,s,i) \

__INS1(s) __INS2(m) \

        : "=r" (addr), "=r" (count) \

        : "0" (addr), "1" (count), "i" (0), "r" (PORT_BASE+port), "I" (i) \

        : "$1");} \

__INS1(s##c) __INS2(m) \

        : "=r" (addr), "=r" (count) \

        : "0" (addr), "1" (count), "ir" (port), "r" (PORT_BASE), "I" (i) \

        : "$1");}

#define __OUTS1(s) \

extern inline void __outs##s(unsigned int port, const void * addr, unsigned long count) {

#define __OUTS2(m) \

__asm__ __volatile__ ( \

        ".set\tnoreorder\n\t" \

        ".set\tnoat\n" \

        "1:\tl" #m "u\t$1,(%0)\n\t" \

        "subu\t%1,%1,1\n\t" \

        "s" #m "\t$1,%4(%5)\n\t" \

        "bne\t$0,%1,1b\n\t" \

        "addiu\t%0,%0,%6\n\t" \

        ".set\tat\n\t" \

        ".set\treorder"

#define __OUTS(m,s,i) \

__OUTS1(s) __OUTS2(m) \

        : "=r" (addr), "=r" (count) \

        : "0" (addr), "1" (count), "i" (0), "r" (PORT_BASE+port), "I" (i) \

        : "$1");} \

__OUTS1(s##c) __OUTS2(m) \

        : "=r" (addr), "=r" (count) \

        : "0" (addr), "1" (count), "ir" (port), "r" (PORT_BASE), "I" (i) \

        : "$1");}

__IN(unsigned char,b,b)

__IN(unsigned short,h,w)

__IN(unsigned int,w,l)

__OUT(b,b)

__OUT(h,w)

__OUT(w,l)

__INS(b,b,1)

__INS(h,w,2)

__INS(w,l,4)

__OUTS(b,b,1)

__OUTS(h,w,2)

__OUTS(w,l,4)

/*

 * 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) < 32768) ? \

        __outbc((val),(port)) : \

        __outb((val),(port)))

#define inb(port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inbc(port) : \

        __inb(port))

#define outb_p(val,port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outbc_p((val),(port)) : \

        __outb_p((val),(port)))

#define inb_p(port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inbc_p(port) : \

        __inb_p(port))

#define outw(val,port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outwc((val),(port)) : \

        __outw((val),(port)))

#define inw(port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inwc(port) : \

        __inw(port))

#define outw_p(val,port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outwc_p((val),(port)) : \

        __outw_p((val),(port)))

#define inw_p(port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inwc_p(port) : \

        __inw_p(port))

#define outl(val,port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outlc((val),(port)) : \

        __outl((val),(port)))

#define inl(port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inlc(port) : \

        __inl(port))

#define outl_p(val,port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outlc_p((val),(port)) : \

        __outl_p((val),(port)))

#define inl_p(port) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inlc_p(port) : \

        __inl_p(port))

#define outsb(port,addr,count) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outsbc((port),(addr),(count)) : \

        __outsb ((port),(addr),(count)))

#define insb(port,addr,count) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __insbc((port),(addr),(count)) : \

        __insb((port),(addr),(count)))

#define outsw(port,addr,count) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outswc((port),(addr),(count)) : \

        __outsw ((port),(addr),(count)))

#define insw(port,addr,count) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inswc((port),(addr),(count)) : \

        __insw((port),(addr),(count)))

#define outsl(port,addr,count) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __outslc((port),(addr),(count)) : \

        __outsl ((port),(addr),(count)))

#define insl(port,addr,count) \

((__builtin_constant_p((port)) && (port) < 32768) ? \

        __inslc((port),(addr),(count)) : \

        __insl((port),(addr),(count)))

#endif /* __ASM_MIPS_IO_H */