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 #define readb_relaxed readb 346 #define readw_relaxed readw 347 #define readl_relaxed readl 348 349 #define writeb_relaxed writeb 350 #define writew_relaxed writew 351 #define writel_relaxed writel 352 353 #endif /* _ASM_MICROBLAZE_IO_H */ 354