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/*

 *  linux/include/asm-arm/io.h

 *

 *  Copyright (C) 1996-2000 Russell King

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * Modifications:

 *  16-Sep-1996 RMK     Inlined the inx/outx functions & optimised for both

 *                      constant addresses and variable addresses.

 *  04-Dec-1997 RMK     Moved a lot of this stuff to the new architecture

 *                      specific IO header files.

 *  27-Mar-1999 PJB     Second parameter of memcpy_toio is const..

 *  04-Apr-1999 PJB     Added check_signature.

 *  12-Dec-1999 RMK     More cleanups

 *  18-Jun-2000 RMK     Removed virt_to_* and friends definitions

 */

#ifndef __ASM_ARM_IO_H

#define __ASM_ARM_IO_H

#ifdef __KERNEL__

#include <linux/types.h>

#include <asm/byteorder.h>

#include <asm/memory.h>

#include <asm/arch/hardware.h>

/*

 * Generic virtual read/write.  Note that we don't support half-word

 * read/writes.  We define __arch_*[bl] here, and leave __arch_*w

 * to the architecture specific code.

 */

#define __arch_getb(a)                  (*(volatile unsigned char *)(a))

#define __arch_getl(a)                  (*(volatile unsigned int  *)(a))

#define __arch_putb(v,a)                (*(volatile unsigned char *)(a) = (v))

#define __arch_putl(v,a)                (*(volatile unsigned int  *)(a) = (v))

extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);

extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);

extern void __raw_writesl(unsigned int addr, const void *data, int longlen);

extern void __raw_readsb(unsigned int addr, void *data, int bytelen);

extern void __raw_readsw(unsigned int addr, void *data, int wordlen);

extern void __raw_readsl(unsigned int addr, void *data, int longlen);

#define __raw_writeb(v,a)               __arch_putb(v,a)

#define __raw_writew(v,a)               __arch_putw(v,a)

#define __raw_writel(v,a)               __arch_putl(v,a)

#define __raw_readb(a)                  __arch_getb(a)

#define __raw_readw(a)                  __arch_getw(a)

#define __raw_readl(a)                  __arch_getl(a)

/*

 * The compiler seems to be incapable of optimising constants

 * properly.  Spell it out to the compiler in some cases.

 * These are only valid for small values of "off" (< 1<<12)

 */

#define __raw_base_writeb(val,base,off) __arch_base_putb(val,base,off)

#define __raw_base_writew(val,base,off) __arch_base_putw(val,base,off)

#define __raw_base_writel(val,base,off) __arch_base_putl(val,base,off)

#define __raw_base_readb(base,off)      __arch_base_getb(base,off)

#define __raw_base_readw(base,off)      __arch_base_getw(base,off)

#define __raw_base_readl(base,off)      __arch_base_getl(base,off)

/*

 * Now, pick up the machine-defined IO definitions

 */

#include <asm/arch/io.h>

/*

 *  IO port access primitives

 *  -------------------------

 *

 * The ARM doesn't have special IO access instructions; all IO is memory

 * mapped.  Note that these are defined to perform little endian accesses

 * only.  Their primary purpose is to access PCI and ISA peripherals.

 *

 * Note that for a big endian machine, this implies that the following

 * big endian mode connectivity is in place, as described by numerious

 * ARM documents:

 *

 *    PCI:  D0-D7   D8-D15 D16-D23 D24-D31

 *    ARM: D24-D31 D16-D23  D8-D15  D0-D7

 *

 * The machine specific io.h include defines __io to translate an "IO"

 * address to a memory address.

 *

 * Note that we prevent GCC re-ordering or caching values in expressions

 * by introducing sequence points into the in*() definitions.  Note that

 * __raw_* do not guarantee this behaviour.

 *

 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.

 */

#ifdef __io

#define outb(v,p)                       __raw_writeb(v,__io(p))

#define outw(v,p)                       __raw_writew(cpu_to_le16(v),__io(p))

#define outl(v,p)                       __raw_writel(cpu_to_le32(v),__io(p))

#define inb(p)  ({ unsigned int __v = __raw_readb(__io(p)); __v; })

#define inw(p)  ({ unsigned int __v = le16_to_cpu(__raw_readw(__io(p))); __v; })

#define inl(p)  ({ unsigned int __v = le32_to_cpu(__raw_readl(__io(p))); __v; })

#define outsb(p,d,l)                    __raw_writesb(__io(p),d,l)

#define outsw(p,d,l)                    __raw_writesw(__io(p),d,l)

#define outsl(p,d,l)                    __raw_writesl(__io(p),d,l)

#define insb(p,d,l)                     __raw_readsb(__io(p),d,l)

#define insw(p,d,l)                     __raw_readsw(__io(p),d,l)

#define insl(p,d,l)                     __raw_readsl(__io(p),d,l)

#endif

#define outb_p(val,port)                outb((val),(port))

#define outw_p(val,port)                outw((val),(port))

#define outl_p(val,port)                outl((val),(port))

#define inb_p(port)                     inb((port))

#define inw_p(port)                     inw((port))

#define inl_p(port)                     inl((port))

#define outsb_p(port,from,len)          outsb(port,from,len)

#define outsw_p(port,from,len)          outsw(port,from,len)

#define outsl_p(port,from,len)          outsl(port,from,len)

#define insb_p(port,to,len)             insb(port,to,len)

#define insw_p(port,to,len)             insw(port,to,len)

#define insl_p(port,to,len)             insl(port,to,len)

/*

 * ioremap and friends.

 *

 * ioremap takes a PCI memory address, as specified in

 * linux/Documentation/IO-mapping.txt.  If you want a

 * physical address, use __ioremap instead.

 */

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

extern void __iounmap(void *addr);

/*

 * Generic ioremap support.

 *

 * Define:

 *  iomem_valid_addr(off,size)

 *  iomem_to_phys(off)

 */

#ifdef iomem_valid_addr

#define __arch_ioremap(off,sz,nocache)                          \

 ({                                                             \

        unsigned long _off = (off), _size = (sz);               \

        void *_ret = (void *)0;                                  \

        if (iomem_valid_addr(_off, _size))                      \

                _ret = __ioremap(iomem_to_phys(_off),_size,0);   \

        _ret;                                                   \

 })

#define __arch_iounmap __iounmap

#endif

#define ioremap(off,sz)                 __arch_ioremap((off),(sz),0)

#define ioremap_nocache(off,sz)         __arch_ioremap((off),(sz),1)

#define iounmap(_addr)                  __arch_iounmap(_addr)

/*

 * DMA-consistent mapping functions.  These allocate/free a region of

 * uncached, unwrite-buffered mapped memory space for use with DMA

 * devices.  This is the "generic" version.  The PCI specific version

 * is in pci.h

 */

extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);

extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);

extern void consistent_sync(void *vaddr, size_t size, int rw);

/*

 * String version of IO memory access ops:

 */

extern void _memcpy_fromio(void *, unsigned long, size_t);

extern void _memcpy_toio(unsigned long, const void *, size_t);

extern void _memset_io(unsigned long, int, size_t);

extern void __readwrite_bug(const char *fn);

/*

 * If this architecture has PCI memory IO, then define the read/write

 * macros.  These should only be used with the cookie passed from

 * ioremap.

 */

#ifdef __mem_pci

#define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })

#define readw(c) ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })

#define readl(c) ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })

#define writeb(v,c)             __raw_writeb(v,__mem_pci(c))

#define writew(v,c)             __raw_writew(cpu_to_le16(v),__mem_pci(c))

#define writel(v,c)             __raw_writel(cpu_to_le32(v),__mem_pci(c))

#define memset_io(c,v,l)                _memset_io(__mem_pci(c),(v),(l))

#define memcpy_fromio(a,c,l)            _memcpy_fromio((a),__mem_pci(c),(l))

#define memcpy_toio(c,a,l)              _memcpy_toio(__mem_pci(c),(a),(l))

#define eth_io_copy_and_sum(s,c,l,b) \

                                eth_copy_and_sum((s),__mem_pci(c),(l),(b))

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;

}

#elif !defined(readb)

#define readb(addr)                     (__readwrite_bug("readb"),0)

#define readw(addr)                     (__readwrite_bug("readw"),0)

#define readl(addr)                     (__readwrite_bug("readl"),0)

#define writeb(v,addr)                  __readwrite_bug("writeb")

#define writew(v,addr)                  __readwrite_bug("writew")

#define writel(v,addr)                  __readwrite_bug("writel")

#define eth_io_copy_and_sum(a,b,c,d)    __readwrite_bug("eth_io_copy_and_sum")

#define check_signature(io,sig,len)     (0)

#endif  /* __mem_pci */

/*

 * If this architecture has ISA IO, then define the isa_read/isa_write

 * macros.

 */

#ifdef __mem_isa

#define isa_readb(addr)                 __raw_readb(__mem_isa(addr))

#define isa_readw(addr)                 __raw_readw(__mem_isa(addr))

#define isa_readl(addr)                 __raw_readl(__mem_isa(addr))

#define isa_writeb(val,addr)            __raw_writeb(val,__mem_isa(addr))

#define isa_writew(val,addr)            __raw_writew(val,__mem_isa(addr))

#define isa_writel(val,addr)            __raw_writel(val,__mem_isa(addr))

#define isa_memset_io(a,b,c)            _memset_io(__mem_isa(a),(b),(c))

#define isa_memcpy_fromio(a,b,c)        _memcpy_fromio((a),__mem_isa(b),(c))

#define isa_memcpy_toio(a,b,c)          _memcpy_toio(__mem_isa((a)),(b),(c))

#define isa_eth_io_copy_and_sum(a,b,c,d) \

                                eth_copy_and_sum((a),__mem_isa(b),(c),(d))

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;

}

#else   /* __mem_isa */

#define isa_readb(addr)                 (__readwrite_bug("isa_readb"),0)

#define isa_readw(addr)                 (__readwrite_bug("isa_readw"),0)

#define isa_readl(addr)                 (__readwrite_bug("isa_readl"),0)

#define isa_writeb(val,addr)            __readwrite_bug("isa_writeb")

#define isa_writew(val,addr)            __readwrite_bug("isa_writew")

#define isa_writel(val,addr)            __readwrite_bug("isa_writel")

#define isa_memset_io(a,b,c)            __readwrite_bug("isa_memset_io")

#define isa_memcpy_fromio(a,b,c)        __readwrite_bug("isa_memcpy_fromio")

#define isa_memcpy_toio(a,b,c)          __readwrite_bug("isa_memcpy_toio")

#define isa_eth_io_copy_and_sum(a,b,c,d) \

                                __readwrite_bug("isa_eth_io_copy_and_sum")

#define isa_check_signature(io,sig,len) (0)

#endif  /* __mem_isa */

#endif  /* __KERNEL__ */

#endif  /* __ASM_ARM_IO_H */