1/* io.h: FRV I/O operations 2 * 3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 * 11 * This gets interesting when talking to the PCI bus - the CPU is in big endian 12 * mode, the PCI bus is little endian and the hardware in the middle can do 13 * byte swapping 14 */ 15#ifndef _ASM_IO_H 16#define _ASM_IO_H 17 18#ifdef __KERNEL__ 19 20#include <linux/types.h> 21#include <asm/virtconvert.h> 22#include <asm/string.h> 23#include <asm/mb-regs.h> 24#include <linux/delay.h> 25 26/* 27 * swap functions are sometimes needed to interface little-endian hardware 28 */ 29 30static inline unsigned short _swapw(unsigned short v) 31{ 32 return ((v << 8) | (v >> 8)); 33} 34 35static inline unsigned long _swapl(unsigned long v) 36{ 37 return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); 38} 39 40//#define __iormb() asm volatile("membar") 41//#define __iowmb() asm volatile("membar") 42 43#define __raw_readb __builtin_read8 44#define __raw_readw __builtin_read16 45#define __raw_readl __builtin_read32 46 47#define __raw_writeb(datum, addr) __builtin_write8(addr, datum) 48#define __raw_writew(datum, addr) __builtin_write16(addr, datum) 49#define __raw_writel(datum, addr) __builtin_write32(addr, datum) 50 51static inline void io_outsb(unsigned int addr, const void *buf, int len) 52{ 53 unsigned long __ioaddr = (unsigned long) addr; 54 const uint8_t *bp = buf; 55 56 while (len--) 57 __builtin_write8((volatile void __iomem *) __ioaddr, *bp++); 58} 59 60static inline void io_outsw(unsigned int addr, const void *buf, int len) 61{ 62 unsigned long __ioaddr = (unsigned long) addr; 63 const uint16_t *bp = buf; 64 65 while (len--) 66 __builtin_write16((volatile void __iomem *) __ioaddr, (*bp++)); 67} 68 69extern void __outsl_ns(unsigned int addr, const void *buf, int len); 70extern void __outsl_sw(unsigned int addr, const void *buf, int len); 71static inline void __outsl(unsigned int addr, const void *buf, int len, int swap) 72{ 73 unsigned long __ioaddr = (unsigned long) addr; 74 75 if (!swap) 76 __outsl_ns(__ioaddr, buf, len); 77 else 78 __outsl_sw(__ioaddr, buf, len); 79} 80 81static inline void io_insb(unsigned long addr, void *buf, int len) 82{ 83 uint8_t *bp = buf; 84 85 while (len--) 86 *bp++ = __builtin_read8((volatile void __iomem *) addr); 87} 88 89static inline void io_insw(unsigned long addr, void *buf, int len) 90{ 91 uint16_t *bp = buf; 92 93 while (len--) 94 *bp++ = __builtin_read16((volatile void __iomem *) addr); 95} 96 97extern void __insl_ns(unsigned long addr, void *buf, int len); 98extern void __insl_sw(unsigned long addr, void *buf, int len); 99static inline void __insl(unsigned long addr, void *buf, int len, int swap) 100{ 101 if (!swap) 102 __insl_ns(addr, buf, len); 103 else 104 __insl_sw(addr, buf, len); 105} 106 107#define mmiowb() mb() 108 109/* 110 * make the short names macros so specific devices 111 * can override them as required 112 */ 113 114static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) 115{ 116 memset((void __force *) addr, val, count); 117} 118 119static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count) 120{ 121 memcpy(dst, (void __force *) src, count); 122} 123 124static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count) 125{ 126 memcpy((void __force *) dst, src, count); 127} 128 129static inline uint8_t inb(unsigned long addr) 130{ 131 return __builtin_read8((void __iomem *)addr); 132} 133 134static inline uint16_t inw(unsigned long addr) 135{ 136 uint16_t ret = __builtin_read16((void __iomem *)addr); 137 138 if (__is_PCI_IO(addr)) 139 ret = _swapw(ret); 140 141 return ret; 142} 143 144static inline uint32_t inl(unsigned long addr) 145{ 146 uint32_t ret = __builtin_read32((void __iomem *)addr); 147 148 if (__is_PCI_IO(addr)) 149 ret = _swapl(ret); 150 151 return ret; 152} 153 154static inline void outb(uint8_t datum, unsigned long addr) 155{ 156 __builtin_write8((void __iomem *)addr, datum); 157} 158 159static inline void outw(uint16_t datum, unsigned long addr) 160{ 161 if (__is_PCI_IO(addr)) 162 datum = _swapw(datum); 163 __builtin_write16((void __iomem *)addr, datum); 164} 165 166static inline void outl(uint32_t datum, unsigned long addr) 167{ 168 if (__is_PCI_IO(addr)) 169 datum = _swapl(datum); 170 __builtin_write32((void __iomem *)addr, datum); 171} 172 173#define inb_p(addr) inb(addr) 174#define inw_p(addr) inw(addr) 175#define inl_p(addr) inl(addr) 176#define outb_p(x,addr) outb(x,addr) 177#define outw_p(x,addr) outw(x,addr) 178#define outl_p(x,addr) outl(x,addr) 179 180#define outsb(a,b,l) io_outsb(a,b,l) 181#define outsw(a,b,l) io_outsw(a,b,l) 182#define outsl(a,b,l) __outsl(a,b,l,0) 183 184#define insb(a,b,l) io_insb(a,b,l) 185#define insw(a,b,l) io_insw(a,b,l) 186#define insl(a,b,l) __insl(a,b,l,0) 187 188#define IO_SPACE_LIMIT 0xffffffff 189 190static inline uint8_t readb(const volatile void __iomem *addr) 191{ 192 return __builtin_read8((__force void volatile __iomem *) addr); 193} 194 195static inline uint16_t readw(const volatile void __iomem *addr) 196{ 197 uint16_t ret = __builtin_read16((__force void volatile __iomem *)addr); 198 199 if (__is_PCI_MEM(addr)) 200 ret = _swapw(ret); 201 return ret; 202} 203 204static inline uint32_t readl(const volatile void __iomem *addr) 205{ 206 uint32_t ret = __builtin_read32((__force void volatile __iomem *)addr); 207 208 if (__is_PCI_MEM(addr)) 209 ret = _swapl(ret); 210 211 return ret; 212} 213 214#define readb_relaxed readb 215#define readw_relaxed readw 216#define readl_relaxed readl 217 218static inline void writeb(uint8_t datum, volatile void __iomem *addr) 219{ 220 __builtin_write8(addr, datum); 221 if (__is_PCI_MEM(addr)) 222 __flush_PCI_writes(); 223} 224 225static inline void writew(uint16_t datum, volatile void __iomem *addr) 226{ 227 if (__is_PCI_MEM(addr)) 228 datum = _swapw(datum); 229 230 __builtin_write16(addr, datum); 231 if (__is_PCI_MEM(addr)) 232 __flush_PCI_writes(); 233} 234 235static inline void writel(uint32_t datum, volatile void __iomem *addr) 236{ 237 if (__is_PCI_MEM(addr)) 238 datum = _swapl(datum); 239 240 __builtin_write32(addr, datum); 241 if (__is_PCI_MEM(addr)) 242 __flush_PCI_writes(); 243} 244 245 246/* Values for nocacheflag and cmode */ 247#define IOMAP_FULL_CACHING 0 248#define IOMAP_NOCACHE_SER 1 249#define IOMAP_NOCACHE_NONSER 2 250#define IOMAP_WRITETHROUGH 3 251 252extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); 253 254static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) 255{ 256 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 257} 258 259static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size) 260{ 261 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 262} 263 264static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size) 265{ 266 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); 267} 268 269static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size) 270{ 271 return __ioremap(physaddr, size, IOMAP_FULL_CACHING); 272} 273 274extern void iounmap(void volatile __iomem *addr); 275 276static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) 277{ 278 return (void __iomem *) port; 279} 280 281static inline void ioport_unmap(void __iomem *p) 282{ 283} 284 285static inline void flush_write_buffers(void) 286{ 287 __asm__ __volatile__ ("membar" : : :"memory"); 288} 289 290/* 291 * do appropriate I/O accesses for token type 292 */ 293static inline unsigned int ioread8(void __iomem *p) 294{ 295 return __builtin_read8(p); 296} 297 298static inline unsigned int ioread16(void __iomem *p) 299{ 300 uint16_t ret = __builtin_read16(p); 301 if (__is_PCI_addr(p)) 302 ret = _swapw(ret); 303 return ret; 304} 305 306static inline unsigned int ioread32(void __iomem *p) 307{ 308 uint32_t ret = __builtin_read32(p); 309 if (__is_PCI_addr(p)) 310 ret = _swapl(ret); 311 return ret; 312} 313 314static inline void iowrite8(u8 val, void __iomem *p) 315{ 316 __builtin_write8(p, val); 317 if (__is_PCI_MEM(p)) 318 __flush_PCI_writes(); 319} 320 321static inline void iowrite16(u16 val, void __iomem *p) 322{ 323 if (__is_PCI_addr(p)) 324 val = _swapw(val); 325 __builtin_write16(p, val); 326 if (__is_PCI_MEM(p)) 327 __flush_PCI_writes(); 328} 329 330static inline void iowrite32(u32 val, void __iomem *p) 331{ 332 if (__is_PCI_addr(p)) 333 val = _swapl(val); 334 __builtin_write32(p, val); 335 if (__is_PCI_MEM(p)) 336 __flush_PCI_writes(); 337} 338 339static inline void ioread8_rep(void __iomem *p, void *dst, unsigned long count) 340{ 341 io_insb((unsigned long) p, dst, count); 342} 343 344static inline void ioread16_rep(void __iomem *p, void *dst, unsigned long count) 345{ 346 io_insw((unsigned long) p, dst, count); 347} 348 349static inline void ioread32_rep(void __iomem *p, void *dst, unsigned long count) 350{ 351 __insl_ns((unsigned long) p, dst, count); 352} 353 354static inline void iowrite8_rep(void __iomem *p, const void *src, unsigned long count) 355{ 356 io_outsb((unsigned long) p, src, count); 357} 358 359static inline void iowrite16_rep(void __iomem *p, const void *src, unsigned long count) 360{ 361 io_outsw((unsigned long) p, src, count); 362} 363 364static inline void iowrite32_rep(void __iomem *p, const void *src, unsigned long count) 365{ 366 __outsl_ns((unsigned long) p, src, count); 367} 368 369/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ 370struct pci_dev; 371extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); 372static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p) 373{ 374} 375 376 377/* 378 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 379 * access 380 */ 381#define xlate_dev_mem_ptr(p) __va(p) 382 383/* 384 * Convert a virtual cached pointer to an uncached pointer 385 */ 386#define xlate_dev_kmem_ptr(p) p 387 388#endif /* __KERNEL__ */ 389 390#endif /* _ASM_IO_H */ 391