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   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 #include <asm-generic/int-ll64.h>
   8
   9 #define build_mmio_read(name, size, type, reg, barrier) \
  10 static inline type name(const volatile void __iomem *addr) \
  11 { type ret; asm volatile("mov" size " %1,%0":reg (ret) \
  12 :"m" (*(volatile type __force *)addr) barrier); return ret; }
  13
  14 #define build_mmio_write(name, size, type, reg, barrier) \
  15 static inline void name(type val, volatile void __iomem *addr) \
  16 { asm volatile("mov" size " %0,%1": :reg (val), \
  17 "m" (*(volatile type __force *)addr) barrier); }
  18
  19 build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
  20 build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
  21 build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
  22
  23 build_mmio_read(__readb, "b", unsigned char, "=q", )
  24 build_mmio_read(__readw, "w", unsigned short, "=r", )
  25 build_mmio_read(__readl, "l", unsigned int, "=r", )
  26
  27 build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
  28 build_mmio_write(writew, "w", unsigned short, "r", :"memory")
  29 build_mmio_write(writel, "l", unsigned int, "r", :"memory")
  30
  31 build_mmio_write(__writeb, "b", unsigned char, "q", )
  32 build_mmio_write(__writew, "w", unsigned short, "r", )
  33 build_mmio_write(__writel, "l", unsigned int, "r", )
  34
  35 #define readb_relaxed(a) __readb(a)
  36 #define readw_relaxed(a) __readw(a)
  37 #define readl_relaxed(a) __readl(a)
  38 #define __raw_readb __readb
  39 #define __raw_readw __readw
  40 #define __raw_readl __readl
  41
  42 #define __raw_writeb __writeb
  43 #define __raw_writew __writew
  44 #define __raw_writel __writel
  45
  46 #define mmiowb() barrier()
  47
  48 #ifdef CONFIG_X86_64
  49 build_mmio_read(readq, "q", unsigned long, "=r", :"memory")
  50 build_mmio_read(__readq, "q", unsigned long, "=r", )
  51 build_mmio_write(writeq, "q", unsigned long, "r", :"memory")
  52 build_mmio_write(__writeq, "q", unsigned long, "r", )
  53
  54 #define readq_relaxed(a) __readq(a)
  55 #define __raw_readq __readq
  56 #define __raw_writeq writeq
  57
  58 #else  /* CONFIG_X86_32 from here */
  59
  60 static inline __u64 readq(const volatile void __iomem *addr)
  61 {
  62         const volatile u32 __iomem *p = addr;
  63         u32 low, high;
  64
  65         low = readl(p);
  66         high = readl(p + 1);
  67
  68         return low + ((u64)high << 32);
  69 }
  70
  71 static inline void writeq(__u64 val, volatile void __iomem *addr)
  72 {
  73         writel(val, addr);
  74         writel(val >> 32, addr+4);
  75 }
  76
  77 #endif
  78
  79 /* Let people know that we have them */
  80 #define readq           readq
  81 #define writeq          writeq
  82
  83 extern int iommu_bio_merge;
  84
  85 #ifdef CONFIG_X86_32
  86 # include "io_32.h"
  87 #else
  88 # include "io_64.h"
  89 #endif
  90
  91 extern void *xlate_dev_mem_ptr(unsigned long phys);
  92 extern void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
  93
  94 extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
  95                                 unsigned long prot_val);
  96 extern void __iomem *ioremap_wc(unsigned long offset, unsigned long size);
  97
  98 /*
  99  * early_ioremap() and early_iounmap() are for temporary early boot-time
 100  * mappings, before the real ioremap() is functional.
 101  * A boot-time mapping is currently limited to at most 16 pages.
 102  */
 103 extern void early_ioremap_init(void);
 104 extern void early_ioremap_clear(void);
 105 extern void early_ioremap_reset(void);
 106 extern void __iomem *early_ioremap(unsigned long offset, unsigned long size);
 107 extern void __iomem *early_memremap(unsigned long offset, unsigned long size);
 108 extern void early_iounmap(void __iomem *addr, unsigned long size);
 109 extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
 110
 111
 112 #endif /* _ASM_X86_IO_H */