include/asm-m32r/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
  71 /*
  72  * IO bus memory addresses are also 1:1 with the physical address
  73  */
  74 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
  75 #define page_to_bus     page_to_phys
  76 #define virt_to_bus     virt_to_phys
  77
  78 extern unsigned char _inb(unsigned long);
  79 extern unsigned short _inw(unsigned long);
  80 extern unsigned long _inl(unsigned long);
  81 extern unsigned char _inb_p(unsigned long);
  82 extern unsigned short _inw_p(unsigned long);
  83 extern unsigned long _inl_p(unsigned long);
  84 extern void _outb(unsigned char, unsigned long);
  85 extern void _outw(unsigned short, unsigned long);
  86 extern void _outl(unsigned long, unsigned long);
  87 extern void _outb_p(unsigned char, unsigned long);
  88 extern void _outw_p(unsigned short, unsigned long);
  89 extern void _outl_p(unsigned long, unsigned long);
  90 extern void _insb(unsigned int, void *, unsigned long);
  91 extern void _insw(unsigned int, void *, unsigned long);
  92 extern void _insl(unsigned int, void *, unsigned long);
  93 extern void _outsb(unsigned int, const void *, unsigned long);
  94 extern void _outsw(unsigned int, const void *, unsigned long);
  95 extern void _outsl(unsigned int, const void *, unsigned long);
  96
  97 static inline unsigned char _readb(unsigned long addr)
  98 {
  99         return *(volatile unsigned char __force *)addr;
 100 }
 101
 102 static inline unsigned short _readw(unsigned long addr)
 103 {
 104         return *(volatile unsigned short __force *)addr;
 105 }
 106
 107 static inline unsigned long _readl(unsigned long addr)
 108 {
 109         return *(volatile unsigned long __force *)addr;
 110 }
 111
 112 static inline void _writeb(unsigned char b, unsigned long addr)
 113 {
 114         *(volatile unsigned char __force *)addr = b;
 115 }
 116
 117 static inline void _writew(unsigned short w, unsigned long addr)
 118 {
 119         *(volatile unsigned short __force *)addr = w;
 120 }
 121
 122 static inline void _writel(unsigned long l, unsigned long addr)
 123 {
 124         *(volatile unsigned long __force *)addr = l;
 125 }
 126
 127 #define inb     _inb
 128 #define inw     _inw
 129 #define inl     _inl
 130 #define outb    _outb
 131 #define outw    _outw
 132 #define outl    _outl
 133
 134 #define inb_p   _inb_p
 135 #define inw_p   _inw_p
 136 #define inl_p   _inl_p
 137 #define outb_p  _outb_p
 138 #define outw_p  _outw_p
 139 #define outl_p  _outl_p
 140
 141 #define insb    _insb
 142 #define insw    _insw
 143 #define insl    _insl
 144 #define outsb   _outsb
 145 #define outsw   _outsw
 146 #define outsl   _outsl
 147
 148 #define readb(addr)   _readb((unsigned long)(addr))
 149 #define readw(addr)   _readw((unsigned long)(addr))
 150 #define readl(addr)   _readl((unsigned long)(addr))
 151 #define __raw_readb readb
 152 #define __raw_readw readw
 153 #define __raw_readl readl
 154 #define readb_relaxed readb
 155 #define readw_relaxed readw
 156 #define readl_relaxed readl
 157
 158 #define writeb(val, addr)  _writeb((val), (unsigned long)(addr))
 159 #define writew(val, addr)  _writew((val), (unsigned long)(addr))
 160 #define writel(val, addr)  _writel((val), (unsigned long)(addr))
 161 #define __raw_writeb writeb
 162 #define __raw_writew writew
 163 #define __raw_writel writel
 164
 165 #define mmiowb()
 166
 167 #define flush_write_buffers() do { } while (0)  /* M32R_FIXME */
 168
 169 /**
 170  *      check_signature         -       find BIOS signatures
 171  *      @io_addr: mmio address to check
 172  *      @signature:  signature block
 173  *      @length: length of signature
 174  *
 175  *      Perform a signature comparison with the ISA mmio address io_addr.
 176  *      Returns 1 on a match.
 177  *
 178  *      This function is deprecated. New drivers should use ioremap and
 179  *      check_signature.
 180  */
 181
 182 static inline int check_signature(void __iomem *io_addr,
 183         const unsigned char *signature, int length)
 184 {
 185         int retval = 0;
 186 #if 0
 187 printk("check_signature\n");
 188         do {
 189                 if (readb(io_addr) != *signature)
 190                         goto out;
 191                 io_addr++;
 192                 signature++;
 193                 length--;
 194         } while (length);
 195         retval = 1;
 196 out:
 197 #endif
 198         return retval;
 199 }
 200
 201 static inline void
 202 memset_io(volatile void __iomem *addr, unsigned char val, int count)
 203 {
 204         memset((void __force *) addr, val, count);
 205 }
 206
 207 static inline void
 208 memcpy_fromio(void *dst, volatile void __iomem *src, int count)
 209 {
 210         memcpy(dst, (void __force *) src, count);
 211 }
 212
 213 static inline void
 214 memcpy_toio(volatile void __iomem *dst, const void *src, int count)
 215 {
 216         memcpy((void __force *) dst, src, count);
 217 }
 218
 219 /*
 220  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 221  * access
 222  */
 223 #define xlate_dev_mem_ptr(p)    __va(p)
 224
 225 /*
 226  * Convert a virtual cached pointer to an uncached pointer
 227  */
 228 #define xlate_dev_kmem_ptr(p)   p
 229
 230 #endif  /* __KERNEL__ */
 231
 232 #endif  /* _ASM_M32R_IO_H */