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C/C++ Source or Header  |  2008-12-24  |  3.0 KB  |  92 lines
  1. #ifndef _ASM_X86_IO_H
  2. #define _ASM_X86_IO_H
  3.  
  4. #define ARCH_HAS_IOREMAP_WC
  5.  
  6. #include <linux/compiler.h>
  7.  
  8. #define build_mmio_read(name, size, type, reg, barrier) \
  9. static inline type name(const volatile void __iomem *addr) \
  10. { type ret; asm volatile("mov" size " %1,%0":reg (ret) \
  11. :"m" (*(volatile type __force *)addr) barrier); return ret; }
  12.  
  13. #define build_mmio_write(name, size, type, reg, barrier) \
  14. static inline void name(type val, volatile void __iomem *addr) \
  15. { asm volatile("mov" size " %0,%1": :reg (val), \
  16. "m" (*(volatile type __force *)addr) barrier); }
  17.  
  18. build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
  19. build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
  20. build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
  21.  
  22. build_mmio_read(__readb, "b", unsigned char, "=q", )
  23. build_mmio_read(__readw, "w", unsigned short, "=r", )
  24. build_mmio_read(__readl, "l", unsigned int, "=r", )
  25.  
  26. build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
  27. build_mmio_write(writew, "w", unsigned short, "r", :"memory")
  28. build_mmio_write(writel, "l", unsigned int, "r", :"memory")
  29.  
  30. build_mmio_write(__writeb, "b", unsigned char, "q", )
  31. build_mmio_write(__writew, "w", unsigned short, "r", )
  32. build_mmio_write(__writel, "l", unsigned int, "r", )
  33.  
  34. #define readb_relaxed(a) __readb(a)
  35. #define readw_relaxed(a) __readw(a)
  36. #define readl_relaxed(a) __readl(a)
  37. #define __raw_readb __readb
  38. #define __raw_readw __readw
  39. #define __raw_readl __readl
  40.  
  41. #define __raw_writeb __writeb
  42. #define __raw_writew __writew
  43. #define __raw_writel __writel
  44.  
  45. #define mmiowb() barrier()
  46.  
  47. #ifdef CONFIG_X86_64
  48. build_mmio_read(readq, "q", unsigned long, "=r", :"memory")
  49. build_mmio_read(__readq, "q", unsigned long, "=r", )
  50. build_mmio_write(writeq, "q", unsigned long, "r", :"memory")
  51. build_mmio_write(__writeq, "q", unsigned long, "r", )
  52.  
  53. #define readq_relaxed(a) __readq(a)
  54. #define __raw_readq __readq
  55. #define __raw_writeq writeq
  56.  
  57. /* Let people know we have them */
  58. #define readq readq
  59. #define writeq writeq
  60. #endif
  61.  
  62. extern int iommu_bio_merge;
  63.  
  64. #ifdef CONFIG_X86_32
  65. # include "io_32.h"
  66. #else
  67. # include "io_64.h"
  68. #endif
  69.  
  70. extern void *xlate_dev_mem_ptr(unsigned long phys);
  71. extern void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
  72.  
  73. extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
  74.                 unsigned long prot_val);
  75. extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size);
  76.  
  77. /*
  78.  * early_ioremap() and early_iounmap() are for temporary early boot-time
  79.  * mappings, before the real ioremap() is functional.
  80.  * A boot-time mapping is currently limited to at most 16 pages.
  81.  */
  82. extern void early_ioremap_init(void);
  83. extern void early_ioremap_clear(void);
  84. extern void early_ioremap_reset(void);
  85. extern void __iomem *early_ioremap(unsigned long offset, unsigned long size);
  86. extern void __iomem *early_memremap(unsigned long offset, unsigned long size);
  87. extern void early_iounmap(void __iomem *addr, unsigned long size);
  88. extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
  89.  
  90.  
  91. #endif /* _ASM_X86_IO_H */
  92.