arch/m32r/include/asm/io.h

   1 #ifndef _ASM_M32R_IO_H
   2 #define _ASM_M32R_IO_H
   3
   4 #include <linux/string.h>
   5 #include <linux/compiler.h>
   6 #include <asm/page.h>  /* __va */
   7
   8 #ifdef __KERNEL__
   9
  10 #define IO_SPACE_LIMIT  0xFFFFFFFF
  11
  12 /**
  13  *      virt_to_phys    -       map virtual addresses to physical
  14  *      @address: address to remap
  15  *
  16  *      The returned physical address is the physical (CPU) mapping for
  17  *      the memory address given. It is only valid to use this function on
  18  *      addresses directly mapped or allocated via kmalloc.
  19  *
  20  *      This function does not give bus mappings for DMA transfers. In
  21  *      almost all conceivable cases a device driver should not be using
  22  *      this function
  23  */
  24
  25 static inline unsigned long virt_to_phys(volatile void * address)
  26 {
  27         return __pa(address);
  28 }
  29
  30 /**
  31  *      phys_to_virt    -       map physical address to virtual
  32  *      @address: address to remap
  33  *
  34  *      The returned virtual address is a current CPU mapping for
  35  *      the memory address given. It is only valid to use this function on
  36  *      addresses that have a kernel mapping
  37  *
  38  *      This function does not handle bus mappings for DMA transfers. In
  39  *      almost all conceivable cases a device driver should not be using
  40  *      this function
  41  */
  42
  43 static inline void *phys_to_virt(unsigned long address)
  44 {
  45         return __va(address);
  46 }
  47
  48 extern void __iomem *
  49 __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
  50
  51 /**
  52  *      ioremap         -       map bus memory into CPU space
  53  *      @offset:        bus address of the memory
  54  *      @size:          size of the resource to map
  55  *
  56  *      ioremap performs a platform specific sequence of operations to
  57  *      make bus memory CPU accessible via the readb/readw/readl/writeb/
  58  *      writew/writel functions and the other mmio helpers. The returned
  59  *      address is not guaranteed to be usable directly as a virtual
  60  *      address.
  61  */
  62
  63 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  64 {
  65         return __ioremap(offset, size, 0);
  66 }
  67
  68 extern void iounmap(volatile void __iomem *addr);
  69 #define ioremap_nocache(off,size) ioremap(off,size)
  70 #define ioremap_wc ioremap_nocache
  71 #define ioremap_wt ioremap_nocache
  72
  73 /*
  74  * IO bus memory addresses are also 1:1 with the physical address
  75  */
  76 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
  77 #define page_to_bus     page_to_phys
  78 #define virt_to_bus     virt_to_phys
  79
  80 extern unsigned char _inb(unsigned long);
  81 extern unsigned short _inw(unsigned long);
  82 extern unsigned long _inl(unsigned long);
  83 extern unsigned char _inb_p(unsigned long);
  84 extern unsigned short _inw_p(unsigned long);
  85 extern unsigned long _inl_p(unsigned long);
  86 extern void _outb(unsigned char, unsigned long);
  87 extern void _outw(unsigned short, unsigned long);
  88 extern void _outl(unsigned long, unsigned long);
  89 extern void _outb_p(unsigned char, unsigned long);
  90 extern void _outw_p(unsigned short, unsigned long);
  91 extern void _outl_p(unsigned long, unsigned long);
  92 extern void _insb(unsigned int, void *, unsigned long);
  93 extern void _insw(unsigned int, void *, unsigned long);
  94 extern void _insl(unsigned int, void *, unsigned long);
  95 extern void _outsb(unsigned int, const void *, unsigned long);
  96 extern void _outsw(unsigned int, const void *, unsigned long);
  97 extern void _outsl(unsigned int, const void *, unsigned long);
  98
  99 static inline unsigned char _readb(unsigned long addr)
 100 {
 101         return *(volatile unsigned char __force *)addr;
 102 }
 103
 104 static inline unsigned short _readw(unsigned long addr)
 105 {
 106         return *(volatile unsigned short __force *)addr;
 107 }
 108
 109 static inline unsigned long _readl(unsigned long addr)
 110 {
 111         return *(volatile unsigned long __force *)addr;
 112 }
 113
 114 static inline void _writeb(unsigned char b, unsigned long addr)
 115 {
 116         *(volatile unsigned char __force *)addr = b;
 117 }
 118
 119 static inline void _writew(unsigned short w, unsigned long addr)
 120 {
 121         *(volatile unsigned short __force *)addr = w;
 122 }
 123
 124 static inline void _writel(unsigned long l, unsigned long addr)
 125 {
 126         *(volatile unsigned long __force *)addr = l;
 127 }
 128
 129 #define inb     _inb
 130 #define inw     _inw
 131 #define inl     _inl
 132 #define outb    _outb
 133 #define outw    _outw
 134 #define outl    _outl
 135
 136 #define inb_p   _inb_p
 137 #define inw_p   _inw_p
 138 #define inl_p   _inl_p
 139 #define outb_p  _outb_p
 140 #define outw_p  _outw_p
 141 #define outl_p  _outl_p
 142
 143 #define insb    _insb
 144 #define insw    _insw
 145 #define insl    _insl
 146 #define outsb   _outsb
 147 #define outsw   _outsw
 148 #define outsl   _outsl
 149
 150 #define readb(addr)   _readb((unsigned long)(addr))
 151 #define readw(addr)   _readw((unsigned long)(addr))
 152 #define readl(addr)   _readl((unsigned long)(addr))
 153 #define __raw_readb readb
 154 #define __raw_readw readw
 155 #define __raw_readl readl
 156 #define readb_relaxed readb
 157 #define readw_relaxed readw
 158 #define readl_relaxed readl
 159
 160 #define writeb(val, addr)  _writeb((val), (unsigned long)(addr))
 161 #define writew(val, addr)  _writew((val), (unsigned long)(addr))
 162 #define writel(val, addr)  _writel((val), (unsigned long)(addr))
 163 #define __raw_writeb writeb
 164 #define __raw_writew writew
 165 #define __raw_writel writel
 166 #define writeb_relaxed writeb
 167 #define writew_relaxed writew
 168 #define writel_relaxed writel
 169
 170 #define ioread8 read
 171 #define ioread16 readw
 172 #define ioread32 readl
 173 #define iowrite8 writeb
 174 #define iowrite16 writew
 175 #define iowrite32 writel
 176
 177 #define ioread16be(addr)        be16_to_cpu(readw(addr))
 178 #define ioread32be(addr)        be32_to_cpu(readl(addr))
 179 #define iowrite16be(v, addr)    writew(cpu_to_be16(v), (addr))
 180 #define iowrite32be(v, addr)    writel(cpu_to_be32(v), (addr))
 181
 182 #define mmiowb()
 183
 184 #define flush_write_buffers() do { } while (0)  /* M32R_FIXME */
 185
 186 static inline void
 187 memset_io(volatile void __iomem *addr, unsigned char val, int count)
 188 {
 189         memset((void __force *) addr, val, count);
 190 }
 191
 192 static inline void
 193 memcpy_fromio(void *dst, volatile void __iomem *src, int count)
 194 {
 195         memcpy(dst, (void __force *) src, count);
 196 }
 197
 198 static inline void
 199 memcpy_toio(volatile void __iomem *dst, const void *src, int count)
 200 {
 201         memcpy((void __force *) dst, src, count);
 202 }
 203
 204 /*
 205  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 206  * access
 207  */
 208 #define xlate_dev_mem_ptr(p)    __va(p)
 209
 210 /*
 211  * Convert a virtual cached pointer to an uncached pointer
 212  */
 213 #define xlate_dev_kmem_ptr(p)   p
 214
 215 #endif  /* __KERNEL__ */
 216
 217 #endif  /* _ASM_M32R_IO_H */