arch/microblaze/include/asm/io.h

   1 /*
   2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
   3  * Copyright (C) 2007-2009 PetaLogix
   4  * Copyright (C) 2006 Atmark Techno, Inc.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License. See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #ifndef _ASM_MICROBLAZE_IO_H
  12 #define _ASM_MICROBLAZE_IO_H
  13
  14 #include <asm/byteorder.h>
  15 #include <asm/page.h>
  16 #include <linux/types.h>
  17 #include <linux/mm.h>          /* Get struct page {...} */
  18
  19
  20 #define IO_SPACE_LIMIT (0xFFFFFFFF)
  21
  22 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  23 {
  24         return *(volatile unsigned char __force *)addr;
  25 }
  26 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  27 {
  28         return *(volatile unsigned short __force *)addr;
  29 }
  30 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  31 {
  32         return *(volatile unsigned int __force *)addr;
  33 }
  34 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  35 {
  36         return *(volatile unsigned long __force *)addr;
  37 }
  38 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
  39 {
  40         *(volatile unsigned char __force *)addr = v;
  41 }
  42 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
  43 {
  44         *(volatile unsigned short __force *)addr = v;
  45 }
  46 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
  47 {
  48         *(volatile unsigned int __force *)addr = v;
  49 }
  50 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
  51 {
  52         *(volatile unsigned long __force *)addr = v;
  53 }
  54
  55 /*
  56  * read (readb, readw, readl, readq) and write (writeb, writew,
  57  * writel, writeq) accessors are for PCI and thus littel endian.
  58  * Linux 2.4 for Microblaze had this wrong.
  59  */
  60 static inline unsigned char readb(const volatile void __iomem *addr)
  61 {
  62         return *(volatile unsigned char __force *)addr;
  63 }
  64 static inline unsigned short readw(const volatile void __iomem *addr)
  65 {
  66         return le16_to_cpu(*(volatile unsigned short __force *)addr);
  67 }
  68 static inline unsigned int readl(const volatile void __iomem *addr)
  69 {
  70         return le32_to_cpu(*(volatile unsigned int __force *)addr);
  71 }
  72 static inline void writeb(unsigned char v, volatile void __iomem *addr)
  73 {
  74         *(volatile unsigned char __force *)addr = v;
  75 }
  76 static inline void writew(unsigned short v, volatile void __iomem *addr)
  77 {
  78         *(volatile unsigned short __force *)addr = cpu_to_le16(v);
  79 }
  80 static inline void writel(unsigned int v, volatile void __iomem *addr)
  81 {
  82         *(volatile unsigned int __force *)addr = cpu_to_le32(v);
  83 }
  84
  85 /* ioread and iowrite variants. thease are for now same as __raw_
  86  * variants of accessors. we might check for endianess in the feature
  87  */
  88 #define ioread8(addr)           __raw_readb((u8 *)(addr))
  89 #define ioread16(addr)          __raw_readw((u16 *)(addr))
  90 #define ioread32(addr)          __raw_readl((u32 *)(addr))
  91 #define iowrite8(v, addr)       __raw_writeb((u8)(v), (u8 *)(addr))
  92 #define iowrite16(v, addr)      __raw_writew((u16)(v), (u16 *)(addr))
  93 #define iowrite32(v, addr)      __raw_writel((u32)(v), (u32 *)(addr))
  94
  95 /* These are the definitions for the x86 IO instructions
  96  * inb/inw/inl/outb/outw/outl, the "string" versions
  97  * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
  98  * inb_p/inw_p/...
  99  * The macros don't do byte-swapping.
 100  */
 101 #define inb(port)               readb((u8 *)((port)))
 102 #define outb(val, port)         writeb((val), (u8 *)((unsigned long)(port)))
 103 #define inw(port)               readw((u16 *)((port)))
 104 #define outw(val, port)         writew((val), (u16 *)((unsigned long)(port)))
 105 #define inl(port)               readl((u32 *)((port)))
 106 #define outl(val, port)         writel((val), (u32 *)((unsigned long)(port)))
 107
 108 #define inb_p(port)             inb((port))
 109 #define outb_p(val, port)       outb((val), (port))
 110 #define inw_p(port)             inw((port))
 111 #define outw_p(val, port)       outw((val), (port))
 112 #define inl_p(port)             inl((port))
 113 #define outl_p(val, port)       outl((val), (port))
 114
 115 #define memset_io(a, b, c)      memset((void *)(a), (b), (c))
 116 #define memcpy_fromio(a, b, c)  memcpy((a), (void *)(b), (c))
 117 #define memcpy_toio(a, b, c)    memcpy((void *)(a), (b), (c))
 118
 119 #ifdef CONFIG_MMU
 120
 121 #define mm_ptov(addr)           ((void *)__phys_to_virt(addr))
 122 #define mm_vtop(addr)           ((unsigned long)__virt_to_phys(addr))
 123 #define phys_to_virt(addr)      ((void *)__phys_to_virt(addr))
 124 #define virt_to_phys(addr)      ((unsigned long)__virt_to_phys(addr))
 125 #define virt_to_bus(addr)       ((unsigned long)__virt_to_phys(addr))
 126
 127 #define __page_address(page) \
 128                 (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
 129 #define page_to_phys(page)      virt_to_phys((void *)__page_address(page))
 130 #define page_to_bus(page)       (page_to_phys(page))
 131 #define bus_to_virt(addr)       (phys_to_virt(addr))
 132
 133 extern void iounmap(void *addr);
 134 /*extern void *__ioremap(phys_addr_t address, unsigned long size,
 135                 unsigned long flags);*/
 136 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
 137 #define ioremap_writethrough(addr, size) ioremap((addr), (size))
 138 #define ioremap_nocache(addr, size)      ioremap((addr), (size))
 139 #define ioremap_fullcache(addr, size)    ioremap((addr), (size))
 140
 141 #else /* CONFIG_MMU */
 142
 143 /**
 144  *      virt_to_phys - map virtual addresses to physical
 145  *      @address: address to remap
 146  *
 147  *      The returned physical address is the physical (CPU) mapping for
 148  *      the memory address given. It is only valid to use this function on
 149  *      addresses directly mapped or allocated via kmalloc.
 150  *
 151  *      This function does not give bus mappings for DMA transfers. In
 152  *      almost all conceivable cases a device driver should not be using
 153  *      this function
 154  */
 155 static inline unsigned long __iomem virt_to_phys(volatile void *address)
 156 {
 157         return __pa((unsigned long)address);
 158 }
 159
 160 #define virt_to_bus virt_to_phys
 161
 162 /**
 163  *      phys_to_virt - map physical address to virtual
 164  *      @address: address to remap
 165  *
 166  *      The returned virtual address is a current CPU mapping for
 167  *      the memory address given. It is only valid to use this function on
 168  *      addresses that have a kernel mapping
 169  *
 170  *      This function does not handle bus mappings for DMA transfers. In
 171  *      almost all conceivable cases a device driver should not be using
 172  *      this function
 173  */
 174 static inline void *phys_to_virt(unsigned long address)
 175 {
 176         return (void *)__va(address);
 177 }
 178
 179 #define bus_to_virt(a) phys_to_virt(a)
 180
 181 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
 182                         unsigned long flags)
 183 {
 184         return (void *)address;
 185 }
 186
 187 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
 188 #define iounmap(addr)           ((void)0)
 189 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
 190
 191 #endif /* CONFIG_MMU */
 192
 193 /*
 194  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 195  * access
 196  */
 197 #define xlate_dev_mem_ptr(p)    __va(p)
 198
 199 /*
 200  * Convert a virtual cached pointer to an uncached pointer
 201  */
 202 #define xlate_dev_kmem_ptr(p)   p
 203
 204 /*
 205  * Big Endian
 206  */
 207 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
 208 #define out_be16(a, v) __raw_writew((v), (a))
 209
 210 #define in_be32(a) __raw_readl((const void __iomem __force *)(a))
 211 #define in_be16(a) __raw_readw(a)
 212
 213 /*
 214  * Little endian
 215  */
 216
 217 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a));
 218 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
 219
 220 #define in_le32(a) __le32_to_cpu(__raw_readl(a))
 221 #define in_le16(a) __le16_to_cpu(__raw_readw(a))
 222
 223 /* Byte ops */
 224 #define out_8(a, v) __raw_writeb((v), (a))
 225 #define in_8(a) __raw_readb(a)
 226
 227 /* FIXME */
 228 static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
 229 {
 230         return (void __iomem *) (port);
 231 }
 232
 233 static inline void ioport_unmap(void __iomem *addr)
 234 {
 235         /* Nothing to do */
 236 }
 237
 238 #endif /* _ASM_MICROBLAZE_IO_H */