include/asm-cris/io.h

   1 #ifndef _ASM_CRIS_IO_H
   2 #define _ASM_CRIS_IO_H
   3
   4 #include <asm/page.h>   /* for __va, __pa */
   5 #include <asm/arch/io.h>
   6
   7 /*
   8  * Change virtual addresses to physical addresses and vv.
   9  */
  10
  11 extern inline unsigned long virt_to_phys(volatile void * address)
  12 {
  13         return __pa(address);
  14 }
  15
  16 extern inline void * phys_to_virt(unsigned long address)
  17 {
  18         return __va(address);
  19 }
  20
  21 extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
  22
  23 extern inline void * ioremap (unsigned long offset, unsigned long size)
  24 {
  25         return __ioremap(offset, size, 0);
  26 }
  27
  28 extern void iounmap(void *addr);
  29
  30 /*
  31  * IO bus memory addresses are also 1:1 with the physical address
  32  */
  33 #define virt_to_bus virt_to_phys
  34 #define bus_to_virt phys_to_virt
  35
  36 /*
  37  * readX/writeX() are used to access memory mapped devices. On some
  38  * architectures the memory mapped IO stuff needs to be accessed
  39  * differently. On the CRIS architecture, we just read/write the
  40  * memory location directly.
  41  */
  42 #define readb(addr) (*(volatile unsigned char *) (addr))
  43 #define readw(addr) (*(volatile unsigned short *) (addr))
  44 #define readl(addr) (*(volatile unsigned int *) (addr))
  45 #define readb_relaxed(addr) readb(addr)
  46 #define readw_relaxed(addr) readw(addr)
  47 #define readl_relaxed(addr) readl(addr)
  48 #define __raw_readb readb
  49 #define __raw_readw readw
  50 #define __raw_readl readl
  51
  52 #define writeb(b,addr) ((*(volatile unsigned char *) (addr)) = (b))
  53 #define writew(b,addr) ((*(volatile unsigned short *) (addr)) = (b))
  54 #define writel(b,addr) ((*(volatile unsigned int *) (addr)) = (b))
  55 #define __raw_writeb writeb
  56 #define __raw_writew writew
  57 #define __raw_writel writel
  58
  59 #define mmiowb()
  60
  61 #define memset_io(a,b,c)        memset((void *)(a),(b),(c))
  62 #define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
  63 #define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
  64
  65 /*
  66  * Again, CRIS does not require mem IO specific function.
  67  */
  68
  69 #define eth_io_copy_and_sum(a,b,c,d)    eth_copy_and_sum((a),(void *)(b),(c),(d))
  70
  71 /* The following is junk needed for the arch-independent code but which
  72  * we never use in the CRIS port
  73  */
  74
  75 #define IO_SPACE_LIMIT 0xffff
  76 #define inb(x) (0)
  77 #define inw(x) (0)
  78 #define inl(x) (0)
  79 #define outb(x,y)
  80 #define outw(x,y)
  81 #define outl(x,y)
  82 #define insb(x,y,z)
  83 #define insw(x,y,z)
  84 #define insl(x,y,z)
  85 #define outsb(x,y,z)
  86 #define outsw(x,y,z)
  87 #define outsl(x,y,z)
  88
  89 /*
  90  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
  91  * access
  92  */
  93 #define xlate_dev_mem_ptr(p)    __va(p)
  94
  95 /*
  96  * Convert a virtual cached pointer to an uncached pointer
  97  */
  98 #define xlate_dev_kmem_ptr(p)   p
  99
 100 #endif