arch/arc/include/asm/io.h

   1 /*
   2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _ASM_ARC_IO_H
  10 #define _ASM_ARC_IO_H
  11
  12 #include <linux/types.h>
  13 #include <asm/byteorder.h>
  14 #include <asm/page.h>
  15
  16 #define PCI_IOBASE ((void __iomem *)0)
  17
  18 extern void __iomem *ioremap(unsigned long physaddr, unsigned long size);
  19 extern void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
  20                                   unsigned long flags);
  21 extern void iounmap(const void __iomem *addr);
  22
  23 #define ioremap_nocache(phy, sz)        ioremap(phy, sz)
  24 #define ioremap_wc(phy, sz)             ioremap(phy, sz)
  25
  26 /* Change struct page to physical address */
  27 #define page_to_phys(page)              (page_to_pfn(page) << PAGE_SHIFT)
  28
  29 #define __raw_readb __raw_readb
  30 static inline u8 __raw_readb(const volatile void __iomem *addr)
  31 {
  32         u8 b;
  33
  34         __asm__ __volatile__(
  35         "       ldb%U1 %0, %1   \n"
  36         : "=r" (b)
  37         : "m" (*(volatile u8 __force *)addr)
  38         : "memory");
  39
  40         return b;
  41 }
  42
  43 #define __raw_readw __raw_readw
  44 static inline u16 __raw_readw(const volatile void __iomem *addr)
  45 {
  46         u16 s;
  47
  48         __asm__ __volatile__(
  49         "       ldw%U1 %0, %1   \n"
  50         : "=r" (s)
  51         : "m" (*(volatile u16 __force *)addr)
  52         : "memory");
  53
  54         return s;
  55 }
  56
  57 #define __raw_readl __raw_readl
  58 static inline u32 __raw_readl(const volatile void __iomem *addr)
  59 {
  60         u32 w;
  61
  62         __asm__ __volatile__(
  63         "       ld%U1 %0, %1    \n"
  64         : "=r" (w)
  65         : "m" (*(volatile u32 __force *)addr)
  66         : "memory");
  67
  68         return w;
  69 }
  70
  71 #define __raw_writeb __raw_writeb
  72 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
  73 {
  74         __asm__ __volatile__(
  75         "       stb%U1 %0, %1   \n"
  76         :
  77         : "r" (b), "m" (*(volatile u8 __force *)addr)
  78         : "memory");
  79 }
  80
  81 #define __raw_writew __raw_writew
  82 static inline void __raw_writew(u16 s, volatile void __iomem *addr)
  83 {
  84         __asm__ __volatile__(
  85         "       stw%U1 %0, %1   \n"
  86         :
  87         : "r" (s), "m" (*(volatile u16 __force *)addr)
  88         : "memory");
  89
  90 }
  91
  92 #define __raw_writel __raw_writel
  93 static inline void __raw_writel(u32 w, volatile void __iomem *addr)
  94 {
  95         __asm__ __volatile__(
  96         "       st%U1 %0, %1    \n"
  97         :
  98         : "r" (w), "m" (*(volatile u32 __force *)addr)
  99         : "memory");
 100
 101 }
 102
 103 #define readb_relaxed readb
 104 #define readw_relaxed readw
 105 #define readl_relaxed readl
 106
 107 #include <asm-generic/io.h>
 108
 109 #endif /* _ASM_ARC_IO_H */