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#ifndef _ASM_IA64_IO_H

#define _ASM_IA64_IO_H

/*

 * This file contains the definitions for the emulated 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.

 *

 * Copyright (C) 1998-2002 Hewlett-Packard Co

 *      David Mosberger-Tang <davidm@hpl.hp.com>

 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>

 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>

 */

/* We don't use IO slowdowns on the ia64, but.. */

#define __SLOW_DOWN_IO  do { } while (0)

#define SLOW_DOWN_IO    do { } while (0)

#define __IA64_UNCACHED_OFFSET  0xc000000000000000      /* region 6 */

/*

 * The legacy I/O space defined by the ia64 architecture supports only 65536 ports, but

 * large machines may have multiple other I/O spaces so we can't place any a priori limit

 * on IO_SPACE_LIMIT.  These additional spaces are described in ACPI.

 */

#define IO_SPACE_LIMIT          0xffffffffffffffffUL

#define MAX_IO_SPACES                   16

#define IO_SPACE_BITS                   24

#define IO_SPACE_SIZE                   (1UL << IO_SPACE_BITS)

#define IO_SPACE_NR(port)               ((port) >> IO_SPACE_BITS)

#define IO_SPACE_BASE(space)            ((space) << IO_SPACE_BITS)

#define IO_SPACE_PORT(port)             ((port) & (IO_SPACE_SIZE - 1))

#define IO_SPACE_SPARSE_ENCODING(p)     ((((p) >> 2) << 12) | (p & 0xfff))

struct io_space {

        unsigned long mmio_base;        /* base in MMIO space */

        int sparse;

};

extern struct io_space io_space[];

extern unsigned int num_io_spaces;

# ifdef __KERNEL__

#include <asm/machvec.h>

#include <asm/page.h>

#include <asm/system.h>

/*

 * Change virtual addresses to physical addresses and vv.

 */

static inline unsigned long

virt_to_phys (volatile void *address)

{

        return (unsigned long) address - PAGE_OFFSET;

}

static inline void*

phys_to_virt (unsigned long address)

{

        return (void *) (address + PAGE_OFFSET);

}

/*

 * The following two macros are deprecated and scheduled for removal.

 * Please use the PCI-DMA interface defined in <asm/pci.h> instead.

 */

#define bus_to_virt     phys_to_virt

#define virt_to_bus     virt_to_phys

#define page_to_bus     page_to_phys

# endif /* KERNEL */

/*

 * Memory fence w/accept.  This should never be used in code that is

 * not IA-64 specific.

 */

#define __ia64_mf_a()   __asm__ __volatile__ ("mf.a" ::: "memory")

static inline const unsigned long

__ia64_get_io_port_base (void)

{

        extern unsigned long ia64_iobase;

        return ia64_iobase;

}

static inline void*

__ia64_mk_io_addr (unsigned long port)

{

        struct io_space *space;

        unsigned long offset;

        space = &io_space[IO_SPACE_NR(port)];

        port = IO_SPACE_PORT(port);

        if (space->sparse)

                offset = IO_SPACE_SPARSE_ENCODING(port);

        else

                offset = port;

        return (void *) (space->mmio_base | offset);

}

/*

 * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access to ensure

 * that the access has completed before executing other I/O accesses.  Since we're doing

 * the accesses through an uncachable (UC) translation, the CPU will execute them in

 * program order.  However, we still need to tell the compiler not to shuffle them around

 * during optimization, which is why we use "volatile" pointers.

 */

static inline unsigned int

__ia64_inb (unsigned long port)

{

        volatile unsigned char *addr = __ia64_mk_io_addr(port);

        unsigned char ret;

        ret = *addr;

        __ia64_mf_a();

        return ret;

}

static inline unsigned int

__ia64_inw (unsigned long port)

{

        volatile unsigned short *addr = __ia64_mk_io_addr(port);

        unsigned short ret;

        ret = *addr;

        __ia64_mf_a();

        return ret;

}

static inline unsigned int

__ia64_inl (unsigned long port)

{

        volatile unsigned int *addr = __ia64_mk_io_addr(port);

        unsigned int ret;

        ret = *addr;

        __ia64_mf_a();

        return ret;

}

static inline void

__ia64_outb (unsigned char val, unsigned long port)

{

        volatile unsigned char *addr = __ia64_mk_io_addr(port);

        *addr = val;

        __ia64_mf_a();

}

static inline void

__ia64_outw (unsigned short val, unsigned long port)

{

        volatile unsigned short *addr = __ia64_mk_io_addr(port);

        *addr = val;

        __ia64_mf_a();

}

static inline void

__ia64_outl (unsigned int val, unsigned long port)

{

        volatile unsigned int *addr = __ia64_mk_io_addr(port);

        *addr = val;

        __ia64_mf_a();

}

static inline void

__insb (unsigned long port, void *dst, unsigned long count)

{

        unsigned char *dp = dst;

        if (platform_inb == __ia64_inb) {

                volatile unsigned char *addr = __ia64_mk_io_addr(port);

                __ia64_mf_a();

                while (count--)

                        *dp++ = *addr;

                __ia64_mf_a();

        } else

                while (count--)

                        *dp++ = platform_inb(port);

        return;

}

static inline void

__insw (unsigned long port, void *dst, unsigned long count)

{

        unsigned short *dp = dst;

        if (platform_inw == __ia64_inw) {

                volatile unsigned short *addr = __ia64_mk_io_addr(port);

                __ia64_mf_a();

                while (count--)

                        *dp++ = *addr;

                __ia64_mf_a();

        } else

                while (count--)

                        *dp++ = platform_inw(port);

        return;

}

static inline void

__insl (unsigned long port, void *dst, unsigned long count)

{

        unsigned int *dp = dst;

        if (platform_inl == __ia64_inl) {

                volatile unsigned int *addr = __ia64_mk_io_addr(port);

                __ia64_mf_a();

                while (count--)

                        *dp++ = *addr;

                __ia64_mf_a();

        } else

                while (count--)

                        *dp++ = platform_inl(port);

        return;

}

static inline void

__outsb (unsigned long port, const void *src, unsigned long count)

{

        const unsigned char *sp = src;

        if (platform_outb == __ia64_outb) {

                volatile unsigned char *addr = __ia64_mk_io_addr(port);

                while (count--)

                        *addr = *sp++;

                __ia64_mf_a();

        } else

                while (count--)

                        platform_outb(*sp++, port);

        return;

}

static inline void

__outsw (unsigned long port, const void *src, unsigned long count)

{

        const unsigned short *sp = src;

        if (platform_outw == __ia64_outw) {

                volatile unsigned short *addr = __ia64_mk_io_addr(port);

                while (count--)

                        *addr = *sp++;

                __ia64_mf_a();

        } else

                while (count--)

                        platform_outw(*sp++, port);

        return;

}

static inline void

__outsl (unsigned long port, void *src, unsigned long count)

{

        const unsigned int *sp = src;

        if (platform_outl == __ia64_outl) {

                volatile unsigned int *addr = __ia64_mk_io_addr(port);

                while (count--)

                        *addr = *sp++;

                __ia64_mf_a();

        } else

                while (count--)

                        platform_outl(*sp++, port);

        return;

}

/*

 * Unfortunately, some platforms are broken and do not follow the IA-64 architecture

 * specification regarding legacy I/O support.  Thus, we have to make these operations

 * platform dependent...

 */

#define __inb           platform_inb

#define __inw           platform_inw

#define __inl           platform_inl

#define __outb          platform_outb

#define __outw          platform_outw

#define __outl          platform_outl

#define inb(p)          __inb(p)

#define inw(p)          __inw(p)

#define inl(p)          __inl(p)

#define insb(p,d,c)     __insb(p,d,c)

#define insw(p,d,c)     __insw(p,d,c)

#define insl(p,d,c)     __insl(p,d,c)

#define outb(v,p)       __outb(v,p)

#define outw(v,p)       __outw(v,p)

#define outl(v,p)       __outl(v,p)

#define outsb(p,s,c)    __outsb(p,s,c)

#define outsw(p,s,c)    __outsw(p,s,c)

#define outsl(p,s,c)    __outsl(p,s,c)

/*

 * The address passed to these functions are ioremap()ped already.

 */

static inline unsigned char

__readb (void *addr)

{

        return *(volatile unsigned char *)addr;

}

static inline unsigned short

__readw (void *addr)

{

        return *(volatile unsigned short *)addr;

}

static inline unsigned int

__readl (void *addr)

{

        return *(volatile unsigned int *) addr;

}

static inline unsigned long

__readq (void *addr)

{

        return *(volatile unsigned long *) addr;

}

static inline void

__writeb (unsigned char val, void *addr)

{

        *(volatile unsigned char *) addr = val;

}

static inline void

__writew (unsigned short val, void *addr)

{

        *(volatile unsigned short *) addr = val;

}

static inline void

__writel (unsigned int val, void *addr)

{

        *(volatile unsigned int *) addr = val;

}

static inline void

__writeq (unsigned long val, void *addr)

{

        *(volatile unsigned long *) addr = val;

}

#define readb(a)        __readb((void *)(a))

#define readw(a)        __readw((void *)(a))

#define readl(a)        __readl((void *)(a))

#define readq(a)        __readq((void *)(a))

#define __raw_readb     readb

#define __raw_readw     readw

#define __raw_readl     readl

#define __raw_readq     readq

#define writeb(v,a)     __writeb((v), (void *) (a))

#define writew(v,a)     __writew((v), (void *) (a))

#define writel(v,a)     __writel((v), (void *) (a))

#define writeq(v,a)     __writeq((v), (void *) (a))

#define __raw_writeb    writeb

#define __raw_writew    writew

#define __raw_writel    writel

#define __raw_writeq    writeq

#ifndef inb_p

# define inb_p          inb

#endif

#ifndef inw_p

# define inw_p          inw

#endif

#ifndef inl_p

# define inl_p          inl

#endif

#ifndef outb_p

# define outb_p         outb

#endif

#ifndef outw_p

# define outw_p         outw

#endif

#ifndef outl_p

# define outl_p         outl

#endif

/*

 * An "address" in IO memory space is not clearly either an integer or a pointer. We will

 * accept both, thus the casts.

 *

 * On ia-64, we access the physical I/O memory space through the uncached kernel region.

 */

static inline void *

ioremap (unsigned long offset, unsigned long size)

{

        return (void *) (__IA64_UNCACHED_OFFSET | (offset));

}

static inline void

iounmap (void *addr)

{

}

#define ioremap_nocache(o,s)    ioremap(o,s)

# ifdef __KERNEL__

/*

 * String version of IO memory access ops:

 */

extern void __ia64_memcpy_fromio (void *, unsigned long, long);

extern void __ia64_memcpy_toio (unsigned long, void *, long);

extern void __ia64_memset_c_io (unsigned long, unsigned long, long);

#define memcpy_fromio(to,from,len) \

  __ia64_memcpy_fromio((to),(unsigned long)(from),(len))

#define memcpy_toio(to,from,len) \

  __ia64_memcpy_toio((unsigned long)(to),(from),(len))

#define memset_io(addr,c,len) \

  __ia64_memset_c_io((unsigned long)(addr),0x0101010101010101UL*(u8)(c),(len))

#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)

# endif /* __KERNEL__ */

#endif /* _ASM_IA64_IO_H */