Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * $Id: io.h,v 1.30 2001/12/21 01:23:21 davem Exp $ |
| 3 | */ |
| 4 | #ifndef __SPARC_IO_H |
| 5 | #define __SPARC_IO_H |
| 6 | |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/ioport.h> /* struct resource */ |
| 10 | |
| 11 | #include <asm/page.h> /* IO address mapping routines need this */ |
| 12 | #include <asm/system.h> |
| 13 | |
| 14 | #define page_to_phys(page) (((page) - mem_map) << PAGE_SHIFT) |
| 15 | |
| 16 | static inline u32 flip_dword (u32 l) |
| 17 | { |
| 18 | return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff); |
| 19 | } |
| 20 | |
| 21 | static inline u16 flip_word (u16 w) |
| 22 | { |
| 23 | return ((w&0xff) << 8) | ((w>>8)&0xff); |
| 24 | } |
| 25 | |
| 26 | #define mmiowb() |
| 27 | |
| 28 | /* |
| 29 | * Memory mapped I/O to PCI |
| 30 | */ |
| 31 | |
| 32 | static inline u8 __raw_readb(const volatile void __iomem *addr) |
| 33 | { |
| 34 | return *(__force volatile u8 *)addr; |
| 35 | } |
| 36 | |
| 37 | static inline u16 __raw_readw(const volatile void __iomem *addr) |
| 38 | { |
| 39 | return *(__force volatile u16 *)addr; |
| 40 | } |
| 41 | |
| 42 | static inline u32 __raw_readl(const volatile void __iomem *addr) |
| 43 | { |
| 44 | return *(__force volatile u32 *)addr; |
| 45 | } |
| 46 | |
| 47 | static inline void __raw_writeb(u8 b, volatile void __iomem *addr) |
| 48 | { |
| 49 | *(__force volatile u8 *)addr = b; |
| 50 | } |
| 51 | |
| 52 | static inline void __raw_writew(u16 w, volatile void __iomem *addr) |
| 53 | { |
| 54 | *(__force volatile u16 *)addr = w; |
| 55 | } |
| 56 | |
| 57 | static inline void __raw_writel(u32 l, volatile void __iomem *addr) |
| 58 | { |
| 59 | *(__force volatile u32 *)addr = l; |
| 60 | } |
| 61 | |
| 62 | static inline u8 __readb(const volatile void __iomem *addr) |
| 63 | { |
| 64 | return *(__force volatile u8 *)addr; |
| 65 | } |
| 66 | |
| 67 | static inline u16 __readw(const volatile void __iomem *addr) |
| 68 | { |
| 69 | return flip_word(*(__force volatile u16 *)addr); |
| 70 | } |
| 71 | |
| 72 | static inline u32 __readl(const volatile void __iomem *addr) |
| 73 | { |
| 74 | return flip_dword(*(__force volatile u32 *)addr); |
| 75 | } |
| 76 | |
| 77 | static inline void __writeb(u8 b, volatile void __iomem *addr) |
| 78 | { |
| 79 | *(__force volatile u8 *)addr = b; |
| 80 | } |
| 81 | |
| 82 | static inline void __writew(u16 w, volatile void __iomem *addr) |
| 83 | { |
| 84 | *(__force volatile u16 *)addr = flip_word(w); |
| 85 | } |
| 86 | |
| 87 | static inline void __writel(u32 l, volatile void __iomem *addr) |
| 88 | { |
| 89 | *(__force volatile u32 *)addr = flip_dword(l); |
| 90 | } |
| 91 | |
| 92 | #define readb(__addr) __readb(__addr) |
| 93 | #define readw(__addr) __readw(__addr) |
| 94 | #define readl(__addr) __readl(__addr) |
| 95 | #define readb_relaxed(__addr) readb(__addr) |
| 96 | #define readw_relaxed(__addr) readw(__addr) |
| 97 | #define readl_relaxed(__addr) readl(__addr) |
| 98 | |
| 99 | #define writeb(__b, __addr) __writeb((__b),(__addr)) |
| 100 | #define writew(__w, __addr) __writew((__w),(__addr)) |
| 101 | #define writel(__l, __addr) __writel((__l),(__addr)) |
| 102 | |
| 103 | /* |
| 104 | * I/O space operations |
| 105 | * |
| 106 | * Arrangement on a Sun is somewhat complicated. |
| 107 | * |
| 108 | * First of all, we want to use standard Linux drivers |
| 109 | * for keyboard, PC serial, etc. These drivers think |
| 110 | * they access I/O space and use inb/outb. |
| 111 | * On the other hand, EBus bridge accepts PCI *memory* |
| 112 | * cycles and converts them into ISA *I/O* cycles. |
| 113 | * Ergo, we want inb & outb to generate PCI memory cycles. |
| 114 | * |
| 115 | * If we want to issue PCI *I/O* cycles, we do this |
| 116 | * with a low 64K fixed window in PCIC. This window gets |
| 117 | * mapped somewhere into virtual kernel space and we |
| 118 | * can use inb/outb again. |
| 119 | */ |
| 120 | #define inb_local(__addr) __readb((void __iomem *)(unsigned long)(__addr)) |
| 121 | #define inb(__addr) __readb((void __iomem *)(unsigned long)(__addr)) |
| 122 | #define inw(__addr) __readw((void __iomem *)(unsigned long)(__addr)) |
| 123 | #define inl(__addr) __readl((void __iomem *)(unsigned long)(__addr)) |
| 124 | |
| 125 | #define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr)) |
| 126 | #define outb(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr)) |
| 127 | #define outw(__w, __addr) __writew(__w, (void __iomem *)(unsigned long)(__addr)) |
| 128 | #define outl(__l, __addr) __writel(__l, (void __iomem *)(unsigned long)(__addr)) |
| 129 | |
| 130 | #define inb_p(__addr) inb(__addr) |
| 131 | #define outb_p(__b, __addr) outb(__b, __addr) |
| 132 | #define inw_p(__addr) inw(__addr) |
| 133 | #define outw_p(__w, __addr) outw(__w, __addr) |
| 134 | #define inl_p(__addr) inl(__addr) |
| 135 | #define outl_p(__l, __addr) outl(__l, __addr) |
| 136 | |
| 137 | void outsb(unsigned long addr, const void *src, unsigned long cnt); |
| 138 | void outsw(unsigned long addr, const void *src, unsigned long cnt); |
| 139 | void outsl(unsigned long addr, const void *src, unsigned long cnt); |
| 140 | void insb(unsigned long addr, void *dst, unsigned long count); |
| 141 | void insw(unsigned long addr, void *dst, unsigned long count); |
| 142 | void insl(unsigned long addr, void *dst, unsigned long count); |
| 143 | |
| 144 | #define IO_SPACE_LIMIT 0xffffffff |
| 145 | |
| 146 | /* |
| 147 | * SBus accessors. |
| 148 | * |
| 149 | * SBus has only one, memory mapped, I/O space. |
| 150 | * We do not need to flip bytes for SBus of course. |
| 151 | */ |
| 152 | static inline u8 _sbus_readb(const volatile void __iomem *addr) |
| 153 | { |
| 154 | return *(__force volatile u8 *)addr; |
| 155 | } |
| 156 | |
| 157 | static inline u16 _sbus_readw(const volatile void __iomem *addr) |
| 158 | { |
| 159 | return *(__force volatile u16 *)addr; |
| 160 | } |
| 161 | |
| 162 | static inline u32 _sbus_readl(const volatile void __iomem *addr) |
| 163 | { |
| 164 | return *(__force volatile u32 *)addr; |
| 165 | } |
| 166 | |
| 167 | static inline void _sbus_writeb(u8 b, volatile void __iomem *addr) |
| 168 | { |
| 169 | *(__force volatile u8 *)addr = b; |
| 170 | } |
| 171 | |
| 172 | static inline void _sbus_writew(u16 w, volatile void __iomem *addr) |
| 173 | { |
| 174 | *(__force volatile u16 *)addr = w; |
| 175 | } |
| 176 | |
| 177 | static inline void _sbus_writel(u32 l, volatile void __iomem *addr) |
| 178 | { |
| 179 | *(__force volatile u32 *)addr = l; |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * The only reason for #define's is to hide casts to unsigned long. |
| 184 | */ |
| 185 | #define sbus_readb(__addr) _sbus_readb(__addr) |
| 186 | #define sbus_readw(__addr) _sbus_readw(__addr) |
| 187 | #define sbus_readl(__addr) _sbus_readl(__addr) |
| 188 | #define sbus_writeb(__b, __addr) _sbus_writeb(__b, __addr) |
| 189 | #define sbus_writew(__w, __addr) _sbus_writew(__w, __addr) |
| 190 | #define sbus_writel(__l, __addr) _sbus_writel(__l, __addr) |
| 191 | |
| 192 | static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n) |
| 193 | { |
| 194 | while(n--) { |
| 195 | sbus_writeb(c, __dst); |
| 196 | __dst++; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | static inline void |
| 201 | _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n) |
| 202 | { |
| 203 | volatile void __iomem *d = dst; |
| 204 | |
| 205 | while (n--) { |
| 206 | writeb(c, d); |
| 207 | d++; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | #define memset_io(d,c,sz) _memset_io(d,c,sz) |
| 212 | |
| 213 | static inline void |
| 214 | _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n) |
| 215 | { |
| 216 | char *d = dst; |
| 217 | |
| 218 | while (n--) { |
| 219 | char tmp = readb(src); |
| 220 | *d++ = tmp; |
| 221 | src++; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz) |
| 226 | |
| 227 | static inline void |
| 228 | _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n) |
| 229 | { |
| 230 | const char *s = src; |
| 231 | volatile void __iomem *d = dst; |
| 232 | |
| 233 | while (n--) { |
| 234 | char tmp = *s++; |
| 235 | writeb(tmp, d); |
| 236 | d++; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | #define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz) |
| 241 | |
| 242 | #ifdef __KERNEL__ |
| 243 | |
| 244 | /* |
| 245 | * Bus number may be embedded in the higher bits of the physical address. |
| 246 | * This is why we have no bus number argument to ioremap(). |
| 247 | */ |
| 248 | extern void __iomem *ioremap(unsigned long offset, unsigned long size); |
| 249 | #define ioremap_nocache(X,Y) ioremap((X),(Y)) |
| 250 | extern void iounmap(volatile void __iomem *addr); |
| 251 | |
David S. Miller | 749805d | 2006-06-25 23:24:24 -0700 | [diff] [blame] | 252 | #define ioread8(X) readb(X) |
| 253 | #define ioread16(X) readw(X) |
| 254 | #define ioread32(X) readl(X) |
| 255 | #define iowrite8(val,X) writeb(val,X) |
| 256 | #define iowrite16(val,X) writew(val,X) |
| 257 | #define iowrite32(val,X) writel(val,X) |
| 258 | |
Al Viro | fdba0f2 | 2007-02-11 18:20:38 +0000 | [diff] [blame] | 259 | static inline void ioread8_rep(void __iomem *port, void *buf, unsigned long count) |
| 260 | { |
| 261 | insb((unsigned long __force)port, buf, count); |
| 262 | } |
| 263 | static inline void ioread16_rep(void __iomem *port, void *buf, unsigned long count) |
| 264 | { |
| 265 | insw((unsigned long __force)port, buf, count); |
| 266 | } |
| 267 | |
| 268 | static inline void ioread32_rep(void __iomem *port, void *buf, unsigned long count) |
| 269 | { |
| 270 | insl((unsigned long __force)port, buf, count); |
| 271 | } |
| 272 | |
| 273 | static inline void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count) |
| 274 | { |
| 275 | outsb((unsigned long __force)port, buf, count); |
| 276 | } |
| 277 | |
| 278 | static inline void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count) |
| 279 | { |
| 280 | outsw((unsigned long __force)port, buf, count); |
| 281 | } |
| 282 | |
| 283 | static inline void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count) |
| 284 | { |
| 285 | outsl((unsigned long __force)port, buf, count); |
| 286 | } |
| 287 | |
David S. Miller | 749805d | 2006-06-25 23:24:24 -0700 | [diff] [blame] | 288 | /* Create a virtual mapping cookie for an IO port range */ |
| 289 | extern void __iomem *ioport_map(unsigned long port, unsigned int nr); |
| 290 | extern void ioport_unmap(void __iomem *); |
| 291 | |
| 292 | /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ |
| 293 | struct pci_dev; |
| 294 | extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max); |
| 295 | extern void pci_iounmap(struct pci_dev *dev, void __iomem *); |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | /* |
| 298 | * Bus number may be in res->flags... somewhere. |
| 299 | */ |
| 300 | extern void __iomem *sbus_ioremap(struct resource *res, unsigned long offset, |
| 301 | unsigned long size, char *name); |
| 302 | extern void sbus_iounmap(volatile void __iomem *vaddr, unsigned long size); |
| 303 | |
| 304 | |
| 305 | /* |
| 306 | * At the moment, we do not use CMOS_READ anywhere outside of rtc.c, |
| 307 | * so rtc_port is static in it. This should not change unless a new |
| 308 | * hardware pops up. |
| 309 | */ |
| 310 | #define RTC_PORT(x) (rtc_port + (x)) |
| 311 | #define RTC_ALWAYS_BCD 0 |
| 312 | |
| 313 | /* Nothing to do */ |
| 314 | /* P3: Only IDE DMA may need these. XXX Verify that it still does... */ |
| 315 | |
| 316 | #define dma_cache_inv(_start,_size) do { } while (0) |
| 317 | #define dma_cache_wback(_start,_size) do { } while (0) |
| 318 | #define dma_cache_wback_inv(_start,_size) do { } while (0) |
| 319 | |
| 320 | #endif |
| 321 | |
| 322 | #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1 |
| 323 | |
| 324 | /* |
| 325 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| 326 | * access |
| 327 | */ |
| 328 | #define xlate_dev_mem_ptr(p) __va(p) |
| 329 | |
| 330 | /* |
| 331 | * Convert a virtual cached pointer to an uncached pointer |
| 332 | */ |
| 333 | #define xlate_dev_kmem_ptr(p) p |
| 334 | |
| 335 | #endif /* !(__SPARC_IO_H) */ |