1#ifndef __ALPHA_JENSEN_H 2#define __ALPHA_JENSEN_H 3 4#include <asm/compiler.h> 5 6/* 7 * Defines for the AlphaPC EISA IO and memory address space. 8 */ 9 10/* 11 * NOTE! The memory operations do not set any memory barriers, as it's 12 * not needed for cases like a frame buffer that is essentially memory-like. 13 * You need to do them by hand if the operations depend on ordering. 14 * 15 * Similarly, the port IO operations do a "mb" only after a write operation: 16 * if an mb is needed before (as in the case of doing memory mapped IO 17 * first, and then a port IO operation to the same device), it needs to be 18 * done by hand. 19 * 20 * After the above has bitten me 100 times, I'll give up and just do the 21 * mb all the time, but right now I'm hoping this will work out. Avoiding 22 * mb's may potentially be a noticeable speed improvement, but I can't 23 * honestly say I've tested it. 24 * 25 * Handling interrupts that need to do mb's to synchronize to non-interrupts 26 * is another fun race area. Don't do it (because if you do, I'll have to 27 * do *everything* with interrupts disabled, ugh). 28 */ 29 30/* 31 * EISA Interrupt Acknowledge address 32 */ 33#define EISA_INTA (IDENT_ADDR + 0x100000000UL) 34 35/* 36 * FEPROM addresses 37 */ 38#define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL) 39#define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL) 40 41/* 42 * VL82C106 base address 43 */ 44#define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL) 45 46/* 47 * EISA "Host Address Extension" address (bits 25-31 of the EISA address) 48 */ 49#define EISA_HAE (IDENT_ADDR + 0x1D0000000UL) 50 51/* 52 * "SYSCTL" register address 53 */ 54#define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL) 55 56/* 57 * "spare" register address 58 */ 59#define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL) 60 61/* 62 * EISA memory address offset 63 */ 64#define EISA_MEM (IDENT_ADDR + 0x200000000UL) 65 66/* 67 * EISA IO address offset 68 */ 69#define EISA_IO (IDENT_ADDR + 0x300000000UL) 70 71 72#ifdef __KERNEL__ 73 74#ifndef __EXTERN_INLINE 75#define __EXTERN_INLINE extern inline 76#define __IO_EXTERN_INLINE 77#endif 78 79/* 80 * Handle the "host address register". This needs to be set 81 * to the high 7 bits of the EISA address. This is also needed 82 * for EISA IO addresses, which are only 16 bits wide (the 83 * hae needs to be set to 0). 84 * 85 * HAE isn't needed for the local IO operations, though. 86 */ 87 88#define JENSEN_HAE_ADDRESS EISA_HAE 89#define JENSEN_HAE_MASK 0x1ffffff 90 91__EXTERN_INLINE void jensen_set_hae(unsigned long addr) 92{ 93 /* hae on the Jensen is bits 31:25 shifted right */ 94 addr >>= 25; 95 if (addr != alpha_mv.hae_cache) 96 set_hae(addr); 97} 98 99#define vuip volatile unsigned int * 100 101/* 102 * IO functions 103 * 104 * The "local" functions are those that don't go out to the EISA bus, 105 * but instead act on the VL82C106 chip directly.. This is mainly the 106 * keyboard, RTC, printer and first two serial lines.. 107 * 108 * The local stuff makes for some complications, but it seems to be 109 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H 110 * convinced that I need one of the newer machines. 111 */ 112 113static inline unsigned int jensen_local_inb(unsigned long addr) 114{ 115 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106); 116} 117 118static inline void jensen_local_outb(u8 b, unsigned long addr) 119{ 120 *(vuip)((addr << 9) + EISA_VL82C106) = b; 121 mb(); 122} 123 124static inline unsigned int jensen_bus_inb(unsigned long addr) 125{ 126 long result; 127 128 jensen_set_hae(0); 129 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00); 130 return __kernel_extbl(result, addr & 3); 131} 132 133static inline void jensen_bus_outb(u8 b, unsigned long addr) 134{ 135 jensen_set_hae(0); 136 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101; 137 mb(); 138} 139 140/* 141 * It seems gcc is not very good at optimizing away logical 142 * operations that result in operations across inline functions. 143 * Which is why this is a macro. 144 */ 145 146#define jensen_is_local(addr) ( \ 147/* keyboard */ (addr == 0x60 || addr == 0x64) || \ 148/* RTC */ (addr == 0x170 || addr == 0x171) || \ 149/* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \ 150/* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \ 151/* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff)) 152 153__EXTERN_INLINE u8 jensen_inb(unsigned long addr) 154{ 155 if (jensen_is_local(addr)) 156 return jensen_local_inb(addr); 157 else 158 return jensen_bus_inb(addr); 159} 160 161__EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr) 162{ 163 if (jensen_is_local(addr)) 164 jensen_local_outb(b, addr); 165 else 166 jensen_bus_outb(b, addr); 167} 168 169__EXTERN_INLINE u16 jensen_inw(unsigned long addr) 170{ 171 long result; 172 173 jensen_set_hae(0); 174 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20); 175 result >>= (addr & 3) * 8; 176 return 0xffffUL & result; 177} 178 179__EXTERN_INLINE u32 jensen_inl(unsigned long addr) 180{ 181 jensen_set_hae(0); 182 return *(vuip) ((addr << 7) + EISA_IO + 0x60); 183} 184 185__EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr) 186{ 187 jensen_set_hae(0); 188 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001; 189 mb(); 190} 191 192__EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr) 193{ 194 jensen_set_hae(0); 195 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b; 196 mb(); 197} 198 199/* 200 * Memory functions. 201 */ 202 203__EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr) 204{ 205 unsigned long addr = (unsigned long) xaddr; 206 long result; 207 208 jensen_set_hae(addr); 209 addr &= JENSEN_HAE_MASK; 210 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00); 211 result >>= (addr & 3) * 8; 212 return 0xffUL & result; 213} 214 215__EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr) 216{ 217 unsigned long addr = (unsigned long) xaddr; 218 long result; 219 220 jensen_set_hae(addr); 221 addr &= JENSEN_HAE_MASK; 222 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20); 223 result >>= (addr & 3) * 8; 224 return 0xffffUL & result; 225} 226 227__EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr) 228{ 229 unsigned long addr = (unsigned long) xaddr; 230 jensen_set_hae(addr); 231 addr &= JENSEN_HAE_MASK; 232 return *(vuip) ((addr << 7) + EISA_MEM + 0x60); 233} 234 235__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr) 236{ 237 unsigned long addr = (unsigned long) xaddr; 238 unsigned long r0, r1; 239 240 jensen_set_hae(addr); 241 addr &= JENSEN_HAE_MASK; 242 addr = (addr << 7) + EISA_MEM + 0x60; 243 r0 = *(vuip) (addr); 244 r1 = *(vuip) (addr + (4 << 7)); 245 return r1 << 32 | r0; 246} 247 248__EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr) 249{ 250 unsigned long addr = (unsigned long) xaddr; 251 jensen_set_hae(addr); 252 addr &= JENSEN_HAE_MASK; 253 *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101; 254} 255 256__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr) 257{ 258 unsigned long addr = (unsigned long) xaddr; 259 jensen_set_hae(addr); 260 addr &= JENSEN_HAE_MASK; 261 *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001; 262} 263 264__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr) 265{ 266 unsigned long addr = (unsigned long) xaddr; 267 jensen_set_hae(addr); 268 addr &= JENSEN_HAE_MASK; 269 *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b; 270} 271 272__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr) 273{ 274 unsigned long addr = (unsigned long) xaddr; 275 jensen_set_hae(addr); 276 addr &= JENSEN_HAE_MASK; 277 addr = (addr << 7) + EISA_MEM + 0x60; 278 *(vuip) (addr) = b; 279 *(vuip) (addr + (4 << 7)) = b >> 32; 280} 281 282__EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr) 283{ 284 return (void __iomem *)addr; 285} 286 287__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr, 288 unsigned long size) 289{ 290 return (void __iomem *)(addr + 0x100000000ul); 291} 292 293__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr) 294{ 295 return (long)addr >= 0; 296} 297 298__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr) 299{ 300 return (unsigned long)addr >= 0x100000000ul; 301} 302 303/* New-style ioread interface. All the routines are so ugly for Jensen 304 that it doesn't make sense to merge them. */ 305 306#define IOPORT(OS, NS) \ 307__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \ 308{ \ 309 if (jensen_is_mmio(xaddr)) \ 310 return jensen_read##OS(xaddr - 0x100000000ul); \ 311 else \ 312 return jensen_in##OS((unsigned long)xaddr); \ 313} \ 314__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \ 315{ \ 316 if (jensen_is_mmio(xaddr)) \ 317 jensen_write##OS(b, xaddr - 0x100000000ul); \ 318 else \ 319 jensen_out##OS(b, (unsigned long)xaddr); \ 320} 321 322IOPORT(b, 8) 323IOPORT(w, 16) 324IOPORT(l, 32) 325 326#undef IOPORT 327 328#undef vuip 329 330#undef __IO_PREFIX 331#define __IO_PREFIX jensen 332#define jensen_trivial_rw_bw 0 333#define jensen_trivial_rw_lq 0 334#define jensen_trivial_io_bw 0 335#define jensen_trivial_io_lq 0 336#define jensen_trivial_iounmap 1 337#include <asm/io_trivial.h> 338 339#ifdef __IO_EXTERN_INLINE 340#undef __EXTERN_INLINE 341#undef __IO_EXTERN_INLINE 342#endif 343 344#endif /* __KERNEL__ */ 345 346#endif /* __ALPHA_JENSEN_H */ 347