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 <asm-generic/pci_iomap.h> 25#include <linux/delay.h> 26 27/* 28 * swap functions are sometimes needed to interface little-endian hardware 29 */ 30 31static inline unsigned short _swapw(unsigned short v) 32{ 33 return ((v << 8) | (v >> 8)); 34} 35 36static inline unsigned long _swapl(unsigned long v) 37{ 38 return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24)); 39} 40 41//#define __iormb() asm volatile("membar") 42//#define __iowmb() asm volatile("membar") 43 44#define __raw_readb __builtin_read8 45#define __raw_readw __builtin_read16 46#define __raw_readl __builtin_read32 47 48#define __raw_writeb(datum, addr) __builtin_write8(addr, datum) 49#define __raw_writew(datum, addr) __builtin_write16(addr, datum) 50#define __raw_writel(datum, addr) __builtin_write32(addr, datum) 51 52static inline void io_outsb(unsigned int addr, const void *buf, int len) 53{ 54 unsigned long __ioaddr = (unsigned long) addr; 55 const uint8_t *bp = buf; 56 57 while (len--) 58 __builtin_write8((volatile void __iomem *) __ioaddr, *bp++); 59} 60 61static inline void io_outsw(unsigned int addr, const void *buf, int len) 62{ 63 unsigned long __ioaddr = (unsigned long) addr; 64 const uint16_t *bp = buf; 65 66 while (len--) 67 __builtin_write16((volatile void __iomem *) __ioaddr, (*bp++)); 68} 69 70extern void __outsl_ns(unsigned int addr, const void *buf, int len); 71extern void __outsl_sw(unsigned int addr, const void *buf, int len); 72static inline void __outsl(unsigned int addr, const void *buf, int len, int swap) 73{ 74 unsigned long __ioaddr = (unsigned long) addr; 75 76 if (!swap) 77 __outsl_ns(__ioaddr, buf, len); 78 else 79 __outsl_sw(__ioaddr, buf, len); 80} 81 82static inline void io_insb(unsigned long addr, void *buf, int len) 83{ 84 uint8_t *bp = buf; 85 86 while (len--) 87 *bp++ = __builtin_read8((volatile void __iomem *) addr); 88} 89 90static inline void io_insw(unsigned long addr, void *buf, int len) 91{ 92 uint16_t *bp = buf; 93 94 while (len--) 95 *bp++ = __builtin_read16((volatile void __iomem *) addr); 96} 97 98extern void __insl_ns(unsigned long addr, void *buf, int len); 99extern void __insl_sw(unsigned long addr, void *buf, int len); 100static inline void __insl(unsigned long addr, void *buf, int len, int swap) 101{ 102 if (!swap) 103 __insl_ns(addr, buf, len); 104 else 105 __insl_sw(addr, buf, len); 106} 107 108#define mmiowb() mb() 109 110/* 111 * make the short names macros so specific devices 112 * can override them as required 113 */ 114 115static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) 116{ 117 memset((void __force *) addr, val, count); 118} 119 120static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count) 121{ 122 memcpy(dst, (void __force *) src, count); 123} 124 125static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count) 126{ 127 memcpy((void __force *) dst, src, count); 128} 129 130static inline uint8_t inb(unsigned long addr) 131{ 132 return __builtin_read8((void __iomem *)addr); 133} 134 135static inline uint16_t inw(unsigned long addr) 136{ 137 uint16_t ret = __builtin_read16((void __iomem *)addr); 138 139 if (__is_PCI_IO(addr)) 140 ret = _swapw(ret); 141 142 return ret; 143} 144 145static inline uint32_t inl(unsigned long addr) 146{ 147 uint32_t ret = __builtin_read32((void __iomem *)addr); 148 149 if (__is_PCI_IO(addr)) 150 ret = _swapl(ret); 151 152 return ret; 153} 154 155static inline void outb(uint8_t datum, unsigned long addr) 156{ 157 __builtin_write8((void __iomem *)addr, datum); 158} 159 160static inline void outw(uint16_t datum, unsigned long addr) 161{ 162 if (__is_PCI_IO(addr)) 163 datum = _swapw(datum); 164 __builtin_write16((void __iomem *)addr, datum); 165} 166 167static inline void outl(uint32_t datum, unsigned long addr) 168{ 169 if (__is_PCI_IO(addr)) 170 datum = _swapl(datum); 171 __builtin_write32((void __iomem *)addr, datum); 172} 173 174#define inb_p(addr) inb(addr) 175#define inw_p(addr) inw(addr) 176#define inl_p(addr) inl(addr) 177#define outb_p(x,addr) outb(x,addr) 178#define outw_p(x,addr) outw(x,addr) 179#define outl_p(x,addr) outl(x,addr) 180 181#define outsb(a,b,l) io_outsb(a,b,l) 182#define outsw(a,b,l) io_outsw(a,b,l) 183#define outsl(a,b,l) __outsl(a,b,l,0) 184 185#define insb(a,b,l) io_insb(a,b,l) 186#define insw(a,b,l) io_insw(a,b,l) 187#define insl(a,b,l) __insl(a,b,l,0) 188 189#define IO_SPACE_LIMIT 0xffffffff 190 191static inline uint8_t readb(const volatile void __iomem *addr) 192{ 193 return __builtin_read8((__force void volatile __iomem *) addr); 194} 195 196static inline uint16_t readw(const volatile void __iomem *addr) 197{ 198 uint16_t ret = __builtin_read16((__force void volatile __iomem *)addr); 199 200 if (__is_PCI_MEM(addr)) 201 ret = _swapw(ret); 202 return ret; 203} 204 205static inline uint32_t readl(const volatile void __iomem *addr) 206{ 207 uint32_t ret = __builtin_read32((__force void volatile __iomem *)addr); 208 209 if (__is_PCI_MEM(addr)) 210 ret = _swapl(ret); 211 212 return ret; 213} 214 215#define readb_relaxed readb 216#define readw_relaxed readw 217#define readl_relaxed readl 218 219static inline void writeb(uint8_t datum, volatile void __iomem *addr) 220{ 221 __builtin_write8(addr, datum); 222 if (__is_PCI_MEM(addr)) 223 __flush_PCI_writes(); 224} 225 226static inline void writew(uint16_t datum, volatile void __iomem *addr) 227{ 228 if (__is_PCI_MEM(addr)) 229 datum = _swapw(datum); 230 231 __builtin_write16(addr, datum); 232 if (__is_PCI_MEM(addr)) 233 __flush_PCI_writes(); 234} 235 236static inline void writel(uint32_t datum, volatile void __iomem *addr) 237{ 238 if (__is_PCI_MEM(addr)) 239 datum = _swapl(datum); 240 241 __builtin_write32(addr, datum); 242 if (__is_PCI_MEM(addr)) 243 __flush_PCI_writes(); 244} 245 246 247/* Values for nocacheflag and cmode */ 248#define IOMAP_FULL_CACHING 0 249#define IOMAP_NOCACHE_SER 1 250#define IOMAP_NOCACHE_NONSER 2 251#define IOMAP_WRITETHROUGH 3 252 253extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag); 254 255static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size) 256{ 257 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 258} 259 260static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned long size) 261{ 262 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); 263} 264 265static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size) 266{ 267 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); 268} 269 270static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size) 271{ 272 return __ioremap(physaddr, size, IOMAP_FULL_CACHING); 273} 274 275#define ioremap_wc ioremap_nocache 276 277extern void iounmap(void volatile __iomem *addr); 278 279static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) 280{ 281 return (void __iomem *) port; 282} 283 284static inline void ioport_unmap(void __iomem *p) 285{ 286} 287 288static inline void flush_write_buffers(void) 289{ 290 __asm__ __volatile__ ("membar" : : :"memory"); 291} 292 293/* 294 * do appropriate I/O accesses for token type 295 */ 296static inline unsigned int ioread8(void __iomem *p) 297{ 298 return __builtin_read8(p); 299} 300 301static inline unsigned int ioread16(void __iomem *p) 302{ 303 uint16_t ret = __builtin_read16(p); 304 if (__is_PCI_addr(p)) 305 ret = _swapw(ret); 306 return ret; 307} 308 309static inline unsigned int ioread32(void __iomem *p) 310{ 311 uint32_t ret = __builtin_read32(p); 312 if (__is_PCI_addr(p)) 313 ret = _swapl(ret); 314 return ret; 315} 316 317static inline void iowrite8(u8 val, void __iomem *p) 318{ 319 __builtin_write8(p, val); 320 if (__is_PCI_MEM(p)) 321 __flush_PCI_writes(); 322} 323 324static inline void iowrite16(u16 val, void __iomem *p) 325{ 326 if (__is_PCI_addr(p)) 327 val = _swapw(val); 328 __builtin_write16(p, val); 329 if (__is_PCI_MEM(p)) 330 __flush_PCI_writes(); 331} 332 333static inline void iowrite32(u32 val, void __iomem *p) 334{ 335 if (__is_PCI_addr(p)) 336 val = _swapl(val); 337 __builtin_write32(p, val); 338 if (__is_PCI_MEM(p)) 339 __flush_PCI_writes(); 340} 341 342static inline void ioread8_rep(void __iomem *p, void *dst, unsigned long count) 343{ 344 io_insb((unsigned long) p, dst, count); 345} 346 347static inline void ioread16_rep(void __iomem *p, void *dst, unsigned long count) 348{ 349 io_insw((unsigned long) p, dst, count); 350} 351 352static inline void ioread32_rep(void __iomem *p, void *dst, unsigned long count) 353{ 354 __insl_ns((unsigned long) p, dst, count); 355} 356 357static inline void iowrite8_rep(void __iomem *p, const void *src, unsigned long count) 358{ 359 io_outsb((unsigned long) p, src, count); 360} 361 362static inline void iowrite16_rep(void __iomem *p, const void *src, unsigned long count) 363{ 364 io_outsw((unsigned long) p, src, count); 365} 366 367static inline void iowrite32_rep(void __iomem *p, const void *src, unsigned long count) 368{ 369 __outsl_ns((unsigned long) p, src, count); 370} 371 372/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ 373struct pci_dev; 374static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p) 375{ 376} 377 378 379/* 380 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 381 * access 382 */ 383#define xlate_dev_mem_ptr(p) __va(p) 384 385/* 386 * Convert a virtual cached pointer to an uncached pointer 387 */ 388#define xlate_dev_kmem_ptr(p) p 389 390#endif /* __KERNEL__ */ 391 392#endif /* _ASM_IO_H */ 393