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 #include <asm-generic/iomap.h>
  19
  20 #ifndef CONFIG_PCI
  21 #define _IO_BASE        0
  22 #define _ISA_MEM_BASE   0
  23 #define PCI_DRAM_OFFSET 0
  24 #else
  25 #define _IO_BASE        isa_io_base
  26 #define _ISA_MEM_BASE   isa_mem_base
  27 #define PCI_DRAM_OFFSET pci_dram_offset
  28 #endif
  29
  30 extern unsigned long isa_io_base;
  31 extern unsigned long pci_io_base;
  32 extern unsigned long pci_dram_offset;
  33
  34 extern resource_size_t isa_mem_base;
  35
  36 #define IO_SPACE_LIMIT (0xFFFFFFFF)
  37
  38 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  39 {
  40         return *(volatile unsigned char __force *)addr;
  41 }
  42 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  43 {
  44         return *(volatile unsigned short __force *)addr;
  45 }
  46 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  47 {
  48         return *(volatile unsigned int __force *)addr;
  49 }
  50 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  51 {
  52         return *(volatile unsigned long __force *)addr;
  53 }
  54 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
  55 {
  56         *(volatile unsigned char __force *)addr = v;
  57 }
  58 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
  59 {
  60         *(volatile unsigned short __force *)addr = v;
  61 }
  62 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
  63 {
  64         *(volatile unsigned int __force *)addr = v;
  65 }
  66 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
  67 {
  68         *(volatile unsigned long __force *)addr = v;
  69 }
  70
  71 /*
  72  * read (readb, readw, readl, readq) and write (writeb, writew,
  73  * writel, writeq) accessors are for PCI and thus little endian.
  74  * Linux 2.4 for Microblaze had this wrong.
  75  */
  76 static inline unsigned char readb(const volatile void __iomem *addr)
  77 {
  78         return *(volatile unsigned char __force *)addr;
  79 }
  80 static inline unsigned short readw(const volatile void __iomem *addr)
  81 {
  82         return le16_to_cpu(*(volatile unsigned short __force *)addr);
  83 }
  84 static inline unsigned int readl(const volatile void __iomem *addr)
  85 {
  86         return le32_to_cpu(*(volatile unsigned int __force *)addr);
  87 }
  88 static inline void writeb(unsigned char v, volatile void __iomem *addr)
  89 {
  90         *(volatile unsigned char __force *)addr = v;
  91 }
  92 static inline void writew(unsigned short v, volatile void __iomem *addr)
  93 {
  94         *(volatile unsigned short __force *)addr = cpu_to_le16(v);
  95 }
  96 static inline void writel(unsigned int v, volatile void __iomem *addr)
  97 {
  98         *(volatile unsigned int __force *)addr = cpu_to_le32(v);
  99 }
 100
 101 /* ioread and iowrite variants. thease are for now same as __raw_
 102  * variants of accessors. we might check for endianess in the feature
 103  */
 104 #define ioread8(addr)           __raw_readb((u8 *)(addr))
 105 #define ioread16(addr)          __raw_readw((u16 *)(addr))
 106 #define ioread32(addr)          __raw_readl((u32 *)(addr))
 107 #define iowrite8(v, addr)       __raw_writeb((u8)(v), (u8 *)(addr))
 108 #define iowrite16(v, addr)      __raw_writew((u16)(v), (u16 *)(addr))
 109 #define iowrite32(v, addr)      __raw_writel((u32)(v), (u32 *)(addr))
 110
 111 #define ioread16be(addr)        __raw_readw((u16 *)(addr))
 112 #define ioread32be(addr)        __raw_readl((u32 *)(addr))
 113 #define iowrite16be(v, addr)    __raw_writew((u16)(v), (u16 *)(addr))
 114 #define iowrite32be(v, addr)    __raw_writel((u32)(v), (u32 *)(addr))
 115
 116 /* These are the definitions for the x86 IO instructions
 117  * inb/inw/inl/outb/outw/outl, the "string" versions
 118  * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
 119  * inb_p/inw_p/...
 120  * The macros don't do byte-swapping.
 121  */
 122 #define inb(port)               readb((u8 *)((port)))
 123 #define outb(val, port)         writeb((val), (u8 *)((unsigned long)(port)))
 124 #define inw(port)               readw((u16 *)((port)))
 125 #define outw(val, port)         writew((val), (u16 *)((unsigned long)(port)))
 126 #define inl(port)               readl((u32 *)((port)))
 127 #define outl(val, port)         writel((val), (u32 *)((unsigned long)(port)))
 128
 129 #define inb_p(port)             inb((port))
 130 #define outb_p(val, port)       outb((val), (port))
 131 #define inw_p(port)             inw((port))
 132 #define outw_p(val, port)       outw((val), (port))
 133 #define inl_p(port)             inl((port))
 134 #define outl_p(val, port)       outl((val), (port))
 135
 136 #define memset_io(a, b, c)      memset((void *)(a), (b), (c))
 137 #define memcpy_fromio(a, b, c)  memcpy((a), (void *)(b), (c))
 138 #define memcpy_toio(a, b, c)    memcpy((void *)(a), (b), (c))
 139
 140 #ifdef CONFIG_MMU
 141
 142 #define phys_to_virt(addr)      ((void *)__phys_to_virt(addr))
 143 #define virt_to_phys(addr)      ((unsigned long)__virt_to_phys(addr))
 144 #define virt_to_bus(addr)       ((unsigned long)__virt_to_phys(addr))
 145
 146 #define page_to_bus(page)       (page_to_phys(page))
 147 #define bus_to_virt(addr)       (phys_to_virt(addr))
 148
 149 extern void iounmap(void *addr);
 150 /*extern void *__ioremap(phys_addr_t address, unsigned long size,
 151                 unsigned long flags);*/
 152 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
 153 #define ioremap_writethrough(addr, size) ioremap((addr), (size))
 154 #define ioremap_nocache(addr, size)      ioremap((addr), (size))
 155 #define ioremap_fullcache(addr, size)    ioremap((addr), (size))
 156
 157 #else /* CONFIG_MMU */
 158
 159 /**
 160  *      virt_to_phys - map virtual addresses to physical
 161  *      @address: address to remap
 162  *
 163  *      The returned physical address is the physical (CPU) mapping for
 164  *      the memory address given. It is only valid to use this function on
 165  *      addresses directly mapped or allocated via kmalloc.
 166  *
 167  *      This function does not give bus mappings for DMA transfers. In
 168  *      almost all conceivable cases a device driver should not be using
 169  *      this function
 170  */
 171 static inline unsigned long __iomem virt_to_phys(volatile void *address)
 172 {
 173         return __pa((unsigned long)address);
 174 }
 175
 176 #define virt_to_bus virt_to_phys
 177
 178 /**
 179  *      phys_to_virt - map physical address to virtual
 180  *      @address: address to remap
 181  *
 182  *      The returned virtual address is a current CPU mapping for
 183  *      the memory address given. It is only valid to use this function on
 184  *      addresses that have a kernel mapping
 185  *
 186  *      This function does not handle bus mappings for DMA transfers. In
 187  *      almost all conceivable cases a device driver should not be using
 188  *      this function
 189  */
 190 static inline void *phys_to_virt(unsigned long address)
 191 {
 192         return (void *)__va(address);
 193 }
 194
 195 #define bus_to_virt(a) phys_to_virt(a)
 196
 197 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
 198                         unsigned long flags)
 199 {
 200         return (void *)address;
 201 }
 202
 203 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
 204 #define iounmap(addr)           ((void)0)
 205 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
 206
 207 #endif /* CONFIG_MMU */
 208
 209 /*
 210  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 211  * access
 212  */
 213 #define xlate_dev_mem_ptr(p)    __va(p)
 214
 215 /*
 216  * Convert a virtual cached pointer to an uncached pointer
 217  */
 218 #define xlate_dev_kmem_ptr(p)   p
 219
 220 /*
 221  * Big Endian
 222  */
 223 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
 224 #define out_be16(a, v) __raw_writew((v), (a))
 225
 226 #define in_be32(a) __raw_readl((const void __iomem __force *)(a))
 227 #define in_be16(a) __raw_readw(a)
 228
 229 #define writel_be(v, a) out_be32((__force unsigned *)a, v)
 230 #define readl_be(a)     in_be32((__force unsigned *)a)
 231
 232 /*
 233  * Little endian
 234  */
 235
 236 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a))
 237 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
 238
 239 #define in_le32(a) __le32_to_cpu(__raw_readl(a))
 240 #define in_le16(a) __le16_to_cpu(__raw_readw(a))
 241
 242 /* Byte ops */
 243 #define out_8(a, v) __raw_writeb((v), (a))
 244 #define in_8(a) __raw_readb(a)
 245
 246 #define mmiowb()
 247
 248 #define ioport_map(port, nr)    ((void __iomem *)(port))
 249 #define ioport_unmap(addr)
 250
 251 #endif /* _ASM_MICROBLAZE_IO_H */