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 /* the following is needed to support PCI with some drivers */
  39
  40 #define mmiowb()
  41
  42 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
  43 {
  44         return *(volatile unsigned char __force *)addr;
  45 }
  46 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
  47 {
  48         return *(volatile unsigned short __force *)addr;
  49 }
  50 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
  51 {
  52         return *(volatile unsigned int __force *)addr;
  53 }
  54 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
  55 {
  56         return *(volatile unsigned long __force *)addr;
  57 }
  58 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
  59 {
  60         *(volatile unsigned char __force *)addr = v;
  61 }
  62 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
  63 {
  64         *(volatile unsigned short __force *)addr = v;
  65 }
  66 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
  67 {
  68         *(volatile unsigned int __force *)addr = v;
  69 }
  70 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
  71 {
  72         *(volatile unsigned long __force *)addr = v;
  73 }
  74
  75 /*
  76  * read (readb, readw, readl, readq) and write (writeb, writew,
  77  * writel, writeq) accessors are for PCI and thus little endian.
  78  * Linux 2.4 for Microblaze had this wrong.
  79  */
  80 static inline unsigned char readb(const volatile void __iomem *addr)
  81 {
  82         return *(volatile unsigned char __force *)addr;
  83 }
  84 static inline unsigned short readw(const volatile void __iomem *addr)
  85 {
  86         return le16_to_cpu(*(volatile unsigned short __force *)addr);
  87 }
  88 static inline unsigned int readl(const volatile void __iomem *addr)
  89 {
  90         return le32_to_cpu(*(volatile unsigned int __force *)addr);
  91 }
  92 static inline void writeb(unsigned char v, volatile void __iomem *addr)
  93 {
  94         *(volatile unsigned char __force *)addr = v;
  95 }
  96 static inline void writew(unsigned short v, volatile void __iomem *addr)
  97 {
  98         *(volatile unsigned short __force *)addr = cpu_to_le16(v);
  99 }
 100 static inline void writel(unsigned int v, volatile void __iomem *addr)
 101 {
 102         *(volatile unsigned int __force *)addr = cpu_to_le32(v);
 103 }
 104
 105 /* ioread and iowrite variants. thease are for now same as __raw_
 106  * variants of accessors. we might check for endianess in the feature
 107  */
 108 #define ioread8(addr)           __raw_readb((u8 *)(addr))
 109 #define ioread16(addr)          __raw_readw((u16 *)(addr))
 110 #define ioread32(addr)          __raw_readl((u32 *)(addr))
 111 #define iowrite8(v, addr)       __raw_writeb((u8)(v), (u8 *)(addr))
 112 #define iowrite16(v, addr)      __raw_writew((u16)(v), (u16 *)(addr))
 113 #define iowrite32(v, addr)      __raw_writel((u32)(v), (u32 *)(addr))
 114
 115 #define ioread16be(addr)        __raw_readw((u16 *)(addr))
 116 #define ioread32be(addr)        __raw_readl((u32 *)(addr))
 117 #define iowrite16be(v, addr)    __raw_writew((u16)(v), (u16 *)(addr))
 118 #define iowrite32be(v, addr)    __raw_writel((u32)(v), (u32 *)(addr))
 119
 120 /* These are the definitions for the x86 IO instructions
 121  * inb/inw/inl/outb/outw/outl, the "string" versions
 122  * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
 123  * inb_p/inw_p/...
 124  * The macros don't do byte-swapping.
 125  */
 126 #define inb(port)               readb((u8 *)((unsigned long)(port)))
 127 #define outb(val, port)         writeb((val), (u8 *)((unsigned long)(port)))
 128 #define inw(port)               readw((u16 *)((unsigned long)(port)))
 129 #define outw(val, port)         writew((val), (u16 *)((unsigned long)(port)))
 130 #define inl(port)               readl((u32 *)((unsigned long)(port)))
 131 #define outl(val, port)         writel((val), (u32 *)((unsigned long)(port)))
 132
 133 #define inb_p(port)             inb((port))
 134 #define outb_p(val, port)       outb((val), (port))
 135 #define inw_p(port)             inw((port))
 136 #define outw_p(val, port)       outw((val), (port))
 137 #define inl_p(port)             inl((port))
 138 #define outl_p(val, port)       outl((val), (port))
 139
 140 #define memset_io(a, b, c)      memset((void *)(a), (b), (c))
 141 #define memcpy_fromio(a, b, c)  memcpy((a), (void *)(b), (c))
 142 #define memcpy_toio(a, b, c)    memcpy((void *)(a), (b), (c))
 143
 144 #ifdef CONFIG_MMU
 145
 146 #define phys_to_virt(addr)      ((void *)__phys_to_virt(addr))
 147 #define virt_to_phys(addr)      ((unsigned long)__virt_to_phys(addr))
 148 #define virt_to_bus(addr)       ((unsigned long)__virt_to_phys(addr))
 149
 150 #define page_to_bus(page)       (page_to_phys(page))
 151 #define bus_to_virt(addr)       (phys_to_virt(addr))
 152
 153 extern void iounmap(void __iomem *addr);
 154 /*extern void *__ioremap(phys_addr_t address, unsigned long size,
 155                 unsigned long flags);*/
 156 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
 157 #define ioremap_writethrough(addr, size) ioremap((addr), (size))
 158 #define ioremap_nocache(addr, size)      ioremap((addr), (size))
 159 #define ioremap_fullcache(addr, size)    ioremap((addr), (size))
 160
 161 #else /* CONFIG_MMU */
 162
 163 /**
 164  *      virt_to_phys - map virtual addresses to physical
 165  *      @address: address to remap
 166  *
 167  *      The returned physical address is the physical (CPU) mapping for
 168  *      the memory address given. It is only valid to use this function on
 169  *      addresses directly mapped or allocated via kmalloc.
 170  *
 171  *      This function does not give bus mappings for DMA transfers. In
 172  *      almost all conceivable cases a device driver should not be using
 173  *      this function
 174  */
 175 static inline unsigned long __iomem virt_to_phys(volatile void *address)
 176 {
 177         return __pa((unsigned long)address);
 178 }
 179
 180 #define virt_to_bus virt_to_phys
 181
 182 /**
 183  *      phys_to_virt - map physical address to virtual
 184  *      @address: address to remap
 185  *
 186  *      The returned virtual address is a current CPU mapping for
 187  *      the memory address given. It is only valid to use this function on
 188  *      addresses that have a kernel mapping
 189  *
 190  *      This function does not handle bus mappings for DMA transfers. In
 191  *      almost all conceivable cases a device driver should not be using
 192  *      this function
 193  */
 194 static inline void *phys_to_virt(unsigned long address)
 195 {
 196         return (void *)__va(address);
 197 }
 198
 199 #define bus_to_virt(a) phys_to_virt(a)
 200
 201 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
 202                         unsigned long flags)
 203 {
 204         return (void *)address;
 205 }
 206
 207 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
 208 #define iounmap(addr)           ((void)0)
 209 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
 210
 211 #endif /* CONFIG_MMU */
 212
 213 /*
 214  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 215  * access
 216  */
 217 #define xlate_dev_mem_ptr(p)    __va(p)
 218
 219 /*
 220  * Convert a virtual cached pointer to an uncached pointer
 221  */
 222 #define xlate_dev_kmem_ptr(p)   p
 223
 224 /*
 225  * Big Endian
 226  */
 227 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
 228 #define out_be16(a, v) __raw_writew((v), (a))
 229
 230 #define in_be32(a) __raw_readl((const void __iomem __force *)(a))
 231 #define in_be16(a) __raw_readw(a)
 232
 233 #define writel_be(v, a) out_be32((__force unsigned *)a, v)
 234 #define readl_be(a)     in_be32((__force unsigned *)a)
 235
 236 /*
 237  * Little endian
 238  */
 239
 240 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a))
 241 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
 242
 243 #define in_le32(a) __le32_to_cpu(__raw_readl(a))
 244 #define in_le16(a) __le16_to_cpu(__raw_readw(a))
 245
 246 /* Byte ops */
 247 #define out_8(a, v) __raw_writeb((v), (a))
 248 #define in_8(a) __raw_readb(a)
 249
 250 #define mmiowb()
 251
 252 #define ioport_map(port, nr)    ((void __iomem *)(port))
 253 #define ioport_unmap(addr)
 254
 255 /* from asm-generic/io.h */
 256 #ifndef insb
 257 static inline void insb(unsigned long addr, void *buffer, int count)
 258 {
 259         if (count) {
 260                 u8 *buf = buffer;
 261                 do {
 262                         u8 x = inb(addr);
 263                         *buf++ = x;
 264                 } while (--count);
 265         }
 266 }
 267 #endif
 268
 269 #ifndef insw
 270 static inline void insw(unsigned long addr, void *buffer, int count)
 271 {
 272         if (count) {
 273                 u16 *buf = buffer;
 274                 do {
 275                         u16 x = inw(addr);
 276                         *buf++ = x;
 277                 } while (--count);
 278         }
 279 }
 280 #endif
 281
 282 #ifndef insl
 283 static inline void insl(unsigned long addr, void *buffer, int count)
 284 {
 285         if (count) {
 286                 u32 *buf = buffer;
 287                 do {
 288                         u32 x = inl(addr);
 289                         *buf++ = x;
 290                 } while (--count);
 291         }
 292 }
 293 #endif
 294
 295 #ifndef outsb
 296 static inline void outsb(unsigned long addr, const void *buffer, int count)
 297 {
 298         if (count) {
 299                 const u8 *buf = buffer;
 300                 do {
 301                         outb(*buf++, addr);
 302                 } while (--count);
 303         }
 304 }
 305 #endif
 306
 307 #ifndef outsw
 308 static inline void outsw(unsigned long addr, const void *buffer, int count)
 309 {
 310         if (count) {
 311                 const u16 *buf = buffer;
 312                 do {
 313                         outw(*buf++, addr);
 314                 } while (--count);
 315         }
 316 }
 317 #endif
 318
 319 #ifndef outsl
 320 static inline void outsl(unsigned long addr, const void *buffer, int count)
 321 {
 322         if (count) {
 323                 const u32 *buf = buffer;
 324                 do {
 325                         outl(*buf++, addr);
 326                 } while (--count);
 327         }
 328 }
 329 #endif
 330
 331 #define ioread8_rep(p, dst, count) \
 332         insb((unsigned long) (p), (dst), (count))
 333 #define ioread16_rep(p, dst, count) \
 334         insw((unsigned long) (p), (dst), (count))
 335 #define ioread32_rep(p, dst, count) \
 336         insl((unsigned long) (p), (dst), (count))
 337
 338 #define iowrite8_rep(p, src, count) \
 339         outsb((unsigned long) (p), (src), (count))
 340 #define iowrite16_rep(p, src, count) \
 341         outsw((unsigned long) (p), (src), (count))
 342 #define iowrite32_rep(p, src, count) \
 343         outsl((unsigned long) (p), (src), (count))
 344
 345 #endif /* _ASM_MICROBLAZE_IO_H */