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 * 101 102 /* 103 * IO functions 104 * 105 * The "local" functions are those that don't go out to the EISA bus, 106 * but instead act on the VL82C106 chip directly.. This is mainly the 107 * keyboard, RTC, printer and first two serial lines.. 108 * 109 * The local stuff makes for some complications, but it seems to be 110 * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H 111 * convinced that I need one of the newer machines. 112 */ 113 114 static inline unsigned int jensen_local_inb(unsigned long addr) 115 { 116 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106); 117 } 118 119 static inline void jensen_local_outb(u8 b, unsigned long addr) 120 { 121 *(vuip)((addr << 9) + EISA_VL82C106) = b; 122 mb(); 123 } 124 125 static inline unsigned int jensen_bus_inb(unsigned long addr) 126 { 127 long result; 128 129 jensen_set_hae(0); 130 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00); 131 return __kernel_extbl(result, addr & 3); 132 } 133 134 static inline void jensen_bus_outb(u8 b, unsigned long addr) 135 { 136 jensen_set_hae(0); 137 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101; 138 mb(); 139 } 140 141 /* 142 * It seems gcc is not very good at optimizing away logical 143 * operations that result in operations across inline functions. 144 * Which is why this is a macro. 145 */ 146 147 #define jensen_is_local(addr) ( \ 148 /* keyboard */ (addr == 0x60 || addr == 0x64) || \ 149 /* RTC */ (addr == 0x170 || addr == 0x171) || \ 150 /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) || \ 151 /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) || \ 152 /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff)) 153 154 __EXTERN_INLINE u8 jensen_inb(unsigned long addr) 155 { 156 if (jensen_is_local(addr)) 157 return jensen_local_inb(addr); 158 else 159 return jensen_bus_inb(addr); 160 } 161 162 __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr) 163 { 164 if (jensen_is_local(addr)) 165 jensen_local_outb(b, addr); 166 else 167 jensen_bus_outb(b, addr); 168 } 169 170 __EXTERN_INLINE u16 jensen_inw(unsigned long addr) 171 { 172 long result; 173 174 jensen_set_hae(0); 175 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20); 176 result >>= (addr & 3) * 8; 177 return 0xffffUL & result; 178 } 179 180 __EXTERN_INLINE u32 jensen_inl(unsigned long addr) 181 { 182 jensen_set_hae(0); 183 return *(vuip) ((addr << 7) + EISA_IO + 0x60); 184 } 185 186 __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr) 187 { 188 jensen_set_hae(0); 189 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001; 190 mb(); 191 } 192 193 __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr) 194 { 195 jensen_set_hae(0); 196 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b; 197 mb(); 198 } 199 200 /* 201 * Memory functions. 202 */ 203 204 __EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr) 205 { 206 unsigned long addr = (unsigned long) xaddr; 207 long result; 208 209 jensen_set_hae(addr); 210 addr &= JENSEN_HAE_MASK; 211 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00); 212 result >>= (addr & 3) * 8; 213 return 0xffUL & result; 214 } 215 216 __EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr) 217 { 218 unsigned long addr = (unsigned long) xaddr; 219 long result; 220 221 jensen_set_hae(addr); 222 addr &= JENSEN_HAE_MASK; 223 result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20); 224 result >>= (addr & 3) * 8; 225 return 0xffffUL & result; 226 } 227 228 __EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr) 229 { 230 unsigned long addr = (unsigned long) xaddr; 231 jensen_set_hae(addr); 232 addr &= JENSEN_HAE_MASK; 233 return *(vuip) ((addr << 7) + EISA_MEM + 0x60); 234 } 235 236 __EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr) 237 { 238 unsigned long addr = (unsigned long) xaddr; 239 unsigned long r0, r1; 240 241 jensen_set_hae(addr); 242 addr &= JENSEN_HAE_MASK; 243 addr = (addr << 7) + EISA_MEM + 0x60; 244 r0 = *(vuip) (addr); 245 r1 = *(vuip) (addr + (4 << 7)); 246 return r1 << 32 | r0; 247 } 248 249 __EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr) 250 { 251 unsigned long addr = (unsigned long) xaddr; 252 jensen_set_hae(addr); 253 addr &= JENSEN_HAE_MASK; 254 *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101; 255 } 256 257 __EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr) 258 { 259 unsigned long addr = (unsigned long) xaddr; 260 jensen_set_hae(addr); 261 addr &= JENSEN_HAE_MASK; 262 *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001; 263 } 264 265 __EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr) 266 { 267 unsigned long addr = (unsigned long) xaddr; 268 jensen_set_hae(addr); 269 addr &= JENSEN_HAE_MASK; 270 *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b; 271 } 272 273 __EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr) 274 { 275 unsigned long addr = (unsigned long) xaddr; 276 jensen_set_hae(addr); 277 addr &= JENSEN_HAE_MASK; 278 addr = (addr << 7) + EISA_MEM + 0x60; 279 *(vuip) (addr) = b; 280 *(vuip) (addr + (4 << 7)) = b >> 32; 281 } 282 283 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr) 284 { 285 return (void __iomem *)addr; 286 } 287 288 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr, 289 unsigned long size) 290 { 291 return (void __iomem *)(addr + 0x100000000ul); 292 } 293 294 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr) 295 { 296 return (long)addr >= 0; 297 } 298 299 __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr) 300 { 301 return (unsigned long)addr >= 0x100000000ul; 302 } 303 304 /* New-style ioread interface. All the routines are so ugly for Jensen 305 that it doesn't make sense to merge them. */ 306 307 #define IOPORT(OS, NS) \ 308 __EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \ 309 { \ 310 if (jensen_is_mmio(xaddr)) \ 311 return jensen_read##OS(xaddr - 0x100000000ul); \ 312 else \ 313 return jensen_in##OS((unsigned long)xaddr); \ 314 } \ 315 __EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \ 316 { \ 317 if (jensen_is_mmio(xaddr)) \ 318 jensen_write##OS(b, xaddr - 0x100000000ul); \ 319 else \ 320 jensen_out##OS(b, (unsigned long)xaddr); \ 321 } 322 323 IOPORT(b, 8) 324 IOPORT(w, 16) 325 IOPORT(l, 32) 326 327 #undef IOPORT 328 329 #undef vuip 330 331 #undef __IO_PREFIX 332 #define __IO_PREFIX jensen 333 #define jensen_trivial_rw_bw 0 334 #define jensen_trivial_rw_lq 0 335 #define jensen_trivial_io_bw 0 336 #define jensen_trivial_io_lq 0 337 #define jensen_trivial_iounmap 1 338 #include <asm/io_trivial.h> 339 340 #ifdef __IO_EXTERN_INLINE 341 #undef __EXTERN_INLINE 342 #undef __IO_EXTERN_INLINE 343 #endif 344 345 #endif /* __KERNEL__ */ 346 347 #endif /* __ALPHA_JENSEN_H */ 348