arch/microblaze/include/asm/io.h

   1 /*
   2  * include/asm-microblaze/io.h -- Misc I/O operations
   3  *
   4  *  Copyright (C) 2003     John Williams <jwilliams@itee.uq.edu.au>
   5  *  Copyright (C) 2001,02  NEC Corporation
   6  *  Copyright (C) 2001,02  Miles Bader <miles@gnu.org>
   7  *
   8  * This file is subject to the terms and conditions of the GNU General
   9  * Public License.  See the file COPYING in the main directory of this
  10  * archive for more details.
  11  *
  12  * Written by Miles Bader <miles@gnu.org>
  13  * Microblaze port by John Williams
  14  */
  15
  16 #ifndef __MICROBLAZE_IO_H__
  17 #define __MICROBLAZE_IO_H__
  18
  19 #include <asm/types.h>
  20
  21 #define IO_SPACE_LIMIT 0xFFFFFFFF
  22
  23 #define readb(addr) \
  24   ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
  25 #define readw(addr) \
  26   ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
  27 #define readl(addr) \
  28   ({ unsigned long __v = (*(volatile unsigned long *) (addr)); __v; })
  29
  30 #define writeb(b, addr) \
  31   (void)((*(volatile unsigned char *) (addr)) = (b))
  32 #define writew(b, addr) \
  33   (void)((*(volatile unsigned short *) (addr)) = (b))
  34 #define writel(b, addr) \
  35   (void)((*(volatile unsigned int *) (addr)) = (b))
  36
  37 #define memset_io(a,b,c)        memset((void *)(a),(b),(c))
  38 #define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
  39 #define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
  40
  41 #define inb(addr)       readb (addr)
  42 #define inw(addr)       readw (addr)
  43 #define inl(addr)       readl (addr)
  44 #define outb(x, addr)   ((void) writeb (x, addr))
  45 #define outw(x, addr)   ((void) writew (x, addr))
  46 #define outl(x, addr)   ((void) writel (x, addr))
  47
  48 /* Some #definitions to keep strange Xilinx code happy */
  49 #define in_8(addr)      readb (addr)
  50 #define in_be16(addr)   readw (addr)
  51 #define in_be32(addr)   readl (addr)
  52
  53 #define out_8(addr,x )  outb (x,addr)
  54 #define out_be16(addr,x )       outw (x,addr)
  55 #define out_be32(addr,x )       outl (x,addr)
  56
  57
  58 #define inb_p(port)             inb((port))
  59 #define outb_p(val, port)       outb((val), (port))
  60 #define inw_p(port)             inw((port))
  61 #define outw_p(val, port)       outw((val), (port))
  62 #define inl_p(port)             inl((port))
  63 #define outl_p(val, port)       outl((val), (port))
  64
  65 /* Some defines to keep the MTD flash drivers happy */
  66
  67 #define __raw_readb readb
  68 #define __raw_readw readw
  69 #define __raw_readl readl
  70 #define __raw_writeb writeb
  71 #define __raw_writew writew
  72 #define __raw_writel writel
  73
  74 static inline void io_insb (unsigned long port, void *dst, unsigned long count)
  75 {
  76         unsigned char *p = dst;
  77         while (count--)
  78                 *p++ = inb (port);
  79 }
  80 static inline void io_insw (unsigned long port, void *dst, unsigned long count)
  81 {
  82         unsigned short *p = dst;
  83         while (count--)
  84                 *p++ = inw (port);
  85 }
  86 static inline void io_insl (unsigned long port, void *dst, unsigned long count)
  87 {
  88         unsigned long *p = dst;
  89         while (count--)
  90                 *p++ = inl (port);
  91 }
  92
  93 static inline void
  94 io_outsb (unsigned long port, const void *src, unsigned long count)
  95 {
  96         const unsigned char *p = src;
  97         while (count--)
  98                 outb (*p++, port);
  99 }
 100 static inline void
 101 io_outsw (unsigned long port, const void *src, unsigned long count)
 102 {
 103         const unsigned short *p = src;
 104         while (count--)
 105                 outw (*p++, port);
 106 }
 107 static inline void
 108 io_outsl (unsigned long port, const void *src, unsigned long count)
 109 {
 110         const unsigned long *p = src;
 111         while (count--)
 112                 outl (*p++, port);
 113 }
 114
 115 #define outsb(a,b,l) io_outsb(a,b,l)
 116 #define outsw(a,b,l) io_outsw(a,b,l)
 117 #define outsl(a,b,l) io_outsl(a,b,l)
 118
 119 #define insb(a,b,l) io_insb(a,b,l)
 120 #define insw(a,b,l) io_insw(a,b,l)
 121 #define insl(a,b,l) io_insl(a,b,l)
 122
 123
 124 #define iounmap(addr)                           ((void)0)
 125 #define ioremap(physaddr, size)                 (physaddr)
 126 #define ioremap_nocache(physaddr, size)         (physaddr)
 127 #define ioremap_writethrough(physaddr, size)    (physaddr)
 128 #define ioremap_fullcache(physaddr, size)       (physaddr)
 129
 130 static inline void sync(void)
 131 {
 132 }
 133
 134 /*
 135  * Given a physical address and a length, return a virtual address
 136  * that can be used to access the memory range with the caching
 137  * properties specified by "flags".
 138  */
 139 #define MAP_NOCACHE     (0)
 140 #define MAP_WRCOMBINE   (0)
 141 #define MAP_WRBACK      (0)
 142 #define MAP_WRTHROUGH   (0)
 143
 144 static inline void *
 145 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
 146 {
 147         return (void *)paddr;
 148 }
 149
 150 /*
 151  * Take down a mapping set up by map_physmem().
 152  */
 153 static inline void unmap_physmem(void *vaddr, unsigned long flags)
 154 {
 155
 156 }
 157
 158 static inline phys_addr_t virt_to_phys(void * vaddr)
 159 {
 160         return (phys_addr_t)(vaddr);
 161 }
 162
 163 #endif /* __MICROBLAZE_IO_H__ */