1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ALPHA_JENSEN_H 3 #define __ALPHA_JENSEN_H 4 5 #include <asm/compiler.h> 6 7 /* 8 * Defines for the AlphaPC EISA IO and memory address space. 9 */ 10 11 /* 12 * NOTE! The memory operations do not set any memory barriers, as it's 13 * not needed for cases like a frame buffer that is essentially memory-like. 14 * You need to do them by hand if the operations depend on ordering. 15 * 16 * Similarly, the port IO operations do a "mb" only after a write operation: 17 * if an mb is needed before (as in the case of doing memory mapped IO 18 * first, and then a port IO operation to the same device), it needs to be 19 * done by hand. 20 * 21 * After the above has bitten me 100 times, I'll give up and just do the 22 * mb all the time, but right now I'm hoping this will work out. Avoiding 23 * mb's may potentially be a noticeable speed improvement, but I can't 24 * honestly say I've tested it. 25 * 26 * Handling interrupts that need to do mb's to synchronize to non-interrupts 27 * is another fun race area. Don't do it (because if you do, I'll have to 28 * do *everything* with interrupts disabled, ugh). 29 */ 30 31 /* 32 * EISA Interrupt Acknowledge address 33 */ 34 #define EISA_INTA (IDENT_ADDR + 0x100000000UL) 35 36 /* 37 * FEPROM addresses 38 */ 39 #define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL) 40 #define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL) 41 42 /* 43 * VL82C106 base address 44 */ 45 #define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL) 46 47 /* 48 * EISA "Host Address Extension" address (bits 25-31 of the EISA address) 49 */ 50 #define EISA_HAE (IDENT_ADDR + 0x1D0000000UL) 51 52 /* 53 * "SYSCTL" register address 54 */ 55 #define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL) 56 57 /* 58 * "spare" register address 59 */ 60 #define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL) 61 62 /* 63 * EISA memory address offset 64 */ 65 #define EISA_MEM (IDENT_ADDR + 0x200000000UL) 66 67 /* 68 * EISA IO address offset 69 */ 70 #define EISA_IO (IDENT_ADDR + 0x300000000UL) 71 72 73 #ifdef __KERNEL__ 74 75 #ifndef __EXTERN_INLINE 76 #define __EXTERN_INLINE extern inline 77 #define __IO_EXTERN_INLINE 78 #endif 79 80 /* 81 * Handle the "host address register". This needs to be set 82 * to the high 7 bits of the EISA address. This is also needed 83 * for EISA IO addresses, which are only 16 bits wide (the 84 * hae needs to be set to 0). 85 * 86 * HAE isn't needed for the local IO operations, though. 87 */ 88 89 #define JENSEN_HAE_ADDRESS EISA_HAE 90 #define JENSEN_HAE_MASK 0x1ffffff 91 92 __EXTERN_INLINE void jensen_set_hae(unsigned long addr) 93 { 94 /* hae on the Jensen is bits 31:25 shifted right */ 95 addr >>= 25; 96 if (addr != alpha_mv.hae_cache) 97 set_hae(addr); 98 } 99 100 #define vuip volatile unsigned int * 101 #define vulp volatile unsigned long * 102 103 /* 104 * IO functions 105 * 106 * The "local" functions are those that don't go out to the EISA bus, 107 * but instead act on the VL82C106 chip directly.. This is mainly the 108 * keyboard, RTC, printer and first two serial lines.. 109 * 110 * The local stuff makes for some complications, but it seems to be 111 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H 112 * convinced that I need one of the newer machines. 113 */ 114 115 __EXTERN_INLINE unsigned int jensen_local_inb(unsigned long addr) 116 { 117 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106); 118 } 119 120 __EXTERN_INLINE void jensen_local_outb(u8 b, unsigned long addr) 121 { 122 *(vuip)((addr << 9) + EISA_VL82C106) = b; 123 mb(); 124 } 125 126 __EXTERN_INLINE unsigned int jensen_bus_inb(unsigned long addr) 127 { 128 long result; 129 130 jensen_set_hae(0); 131 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00); 132 return __kernel_extbl(result, addr & 3); 133 } 134 135 __EXTERN_INLINE void jensen_bus_outb(u8 b, unsigned long addr) 136 { 137 jensen_set_hae(0); 138 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101; 139 mb(); 140 } 141 142 /* 143 * It seems gcc is not very good at optimizing away logical 144 * operations that result in operations across inline functions. 145 * Which is why this is a macro. 146 */ 147 148 #define jensen_is_local(addr) ( \ 149 /* keyboard */ (addr == 0x60 || addr == 0x64) || \ 150 /* RTC */ (addr == 0x170 || addr == 0x171) || \ 151 /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \ 152 /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \ 153 /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff)) 154 155 __EXTERN_INLINE u8 jensen_inb(unsigned long addr) 156 { 157 if (jensen_is_local(addr)) 158 return jensen_local_inb(addr); 159 else 160 return jensen_bus_inb(addr); 161 } 162 163 __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr) 164 { 165 if (jensen_is_local(addr)) 166 jensen_local_outb(b, addr); 167 else 168 jensen_bus_outb(b, addr); 169 } 170 171 __EXTERN_INLINE u16 jensen_inw(unsigned long addr) 172 { 173 long result; 174 175 jensen_set_hae(0); 176 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20); 177 result >>= (addr & 3) * 8; 178 return 0xffffUL & result; 179 } 180 181 __EXTERN_INLINE u32 jensen_inl(unsigned long addr) 182 { 183 jensen_set_hae(0); 184 return *(vuip) ((addr << 7) + EISA_IO + 0x60); 185 } 186 187 __EXTERN_INLINE u64 jensen_inq(unsigned long addr) 188 { 189 jensen_set_hae(0); 190 return *(vulp) ((addr << 7) + EISA_IO + 0x60); 191 } 192 193 __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr) 194 { 195 jensen_set_hae(0); 196 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001; 197 mb(); 198 } 199 200 __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr) 201 { 202 jensen_set_hae(0); 203 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b; 204 mb(); 205 } 206 207 __EXTERN_INLINE void jensen_outq(u64 b, unsigned long addr) 208 { 209 jensen_set_hae(0); 210 *(vulp) ((addr << 7) + EISA_IO + 0x60) = b; 211 mb(); 212 } 213 214 /* 215 * Memory functions. 216 */ 217 218 __EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr) 219 { 220 unsigned long addr = (unsigned long) xaddr; 221 long result; 222 223 jensen_set_hae(addr); 224 addr &= JENSEN_HAE_MASK; 225 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00); 226 result >>= (addr & 3) * 8; 227 return 0xffUL & result; 228 } 229 230 __EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr) 231 { 232 unsigned long addr = (unsigned long) xaddr; 233 long result; 234 235 jensen_set_hae(addr); 236 addr &= JENSEN_HAE_MASK; 237 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20); 238 result >>= (addr & 3) * 8; 239 return 0xffffUL & result; 240 } 241 242 __EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr) 243 { 244 unsigned long addr = (unsigned long) xaddr; 245 jensen_set_hae(addr); 246 addr &= JENSEN_HAE_MASK; 247 return *(vuip) ((addr << 7) + EISA_MEM + 0x60); 248 } 249 250 __EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr) 251 { 252 unsigned long addr = (unsigned long) xaddr; 253 unsigned long r0, r1; 254 255 jensen_set_hae(addr); 256 addr &= JENSEN_HAE_MASK; 257 addr = (addr << 7) + EISA_MEM + 0x60; 258 r0 = *(vuip) (addr); 259 r1 = *(vuip) (addr + (4 << 7)); 260 return r1 << 32 | r0; 261 } 262 263 __EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr) 264 { 265 unsigned long addr = (unsigned long) xaddr; 266 jensen_set_hae(addr); 267 addr &= JENSEN_HAE_MASK; 268 *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101; 269 } 270 271 __EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr) 272 { 273 unsigned long addr = (unsigned long) xaddr; 274 jensen_set_hae(addr); 275 addr &= JENSEN_HAE_MASK; 276 *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001; 277 } 278 279 __EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr) 280 { 281 unsigned long addr = (unsigned long) xaddr; 282 jensen_set_hae(addr); 283 addr &= JENSEN_HAE_MASK; 284 *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b; 285 } 286 287 __EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr) 288 { 289 unsigned long addr = (unsigned long) xaddr; 290 jensen_set_hae(addr); 291 addr &= JENSEN_HAE_MASK; 292 addr = (addr << 7) + EISA_MEM + 0x60; 293 *(vuip) (addr) = b; 294 *(vuip) (addr + (4 << 7)) = b >> 32; 295 } 296 297 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr) 298 { 299 return (void __iomem *)addr; 300 } 301 302 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr, 303 unsigned long size) 304 { 305 return (void __iomem *)(addr + 0x100000000ul); 306 } 307 308 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr) 309 { 310 return (long)addr >= 0; 311 } 312 313 __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr) 314 { 315 return (unsigned long)addr >= 0x100000000ul; 316 } 317 318 /* New-style ioread interface. All the routines are so ugly for Jensen 319 that it doesn't make sense to merge them. */ 320 321 #define IOPORT(OS, NS) \ 322 __EXTERN_INLINE u##NS jensen_ioread##NS(const void __iomem *xaddr) \ 323 { \ 324 if (jensen_is_mmio(xaddr)) \ 325 return jensen_read##OS(xaddr - 0x100000000ul); \ 326 else \ 327 return jensen_in##OS((unsigned long)xaddr); \ 328 } \ 329 __EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \ 330 { \ 331 if (jensen_is_mmio(xaddr)) \ 332 jensen_write##OS(b, xaddr - 0x100000000ul); \ 333 else \ 334 jensen_out##OS(b, (unsigned long)xaddr); \ 335 } 336 337 IOPORT(b, 8) 338 IOPORT(w, 16) 339 IOPORT(l, 32) 340 IOPORT(q, 64) 341 342 #undef IOPORT 343 344 #undef vuip 345 #undef vulp 346 347 #undef __IO_PREFIX 348 #define __IO_PREFIX jensen 349 #define jensen_trivial_rw_bw 0 350 #define jensen_trivial_rw_lq 0 351 #define jensen_trivial_io_bw 0 352 #define jensen_trivial_io_lq 0 353 #define jensen_trivial_iounmap 1 354 #include <asm/io_trivial.h> 355 356 #ifdef __IO_EXTERN_INLINE 357 #undef __EXTERN_INLINE 358 #undef __IO_EXTERN_INLINE 359 #endif 360 361 #endif /* __KERNEL__ */ 362 363 #endif /* __ALPHA_JENSEN_H */ 364