1 /***********************license start*************** 2 * Author: Cavium Networks 3 * 4 * Contact: support@caviumnetworks.com 5 * This file is part of the OCTEON SDK 6 * 7 * Copyright (c) 2003-2008 Cavium Networks 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this file; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * or visit http://www.gnu.org/licenses/. 23 * 24 * This file may also be available under a different license from Cavium. 25 * Contact Cavium Networks for more information 26 ***********************license end**************************************/ 27 28 #ifndef __CVMX_H__ 29 #define __CVMX_H__ 30 31 #include <linux/kernel.h> 32 #include <linux/string.h> 33 34 enum cvmx_mips_space { 35 CVMX_MIPS_SPACE_XKSEG = 3LL, 36 CVMX_MIPS_SPACE_XKPHYS = 2LL, 37 CVMX_MIPS_SPACE_XSSEG = 1LL, 38 CVMX_MIPS_SPACE_XUSEG = 0LL 39 }; 40 41 /* These macros for use when using 32 bit pointers. */ 42 #define CVMX_MIPS32_SPACE_KSEG0 1l 43 #define CVMX_ADD_SEG32(segment, add) \ 44 (((int32_t)segment << 31) | (int32_t)(add)) 45 46 #define CVMX_IO_SEG CVMX_MIPS_SPACE_XKPHYS 47 48 /* These macros simplify the process of creating common IO addresses */ 49 #define CVMX_ADD_SEG(segment, add) \ 50 ((((uint64_t)segment) << 62) | (add)) 51 #ifndef CVMX_ADD_IO_SEG 52 #define CVMX_ADD_IO_SEG(add) CVMX_ADD_SEG(CVMX_IO_SEG, (add)) 53 #endif 54 55 #include <asm/octeon/cvmx-asm.h> 56 #include <asm/octeon/cvmx-packet.h> 57 #include <asm/octeon/cvmx-sysinfo.h> 58 59 #include <asm/octeon/cvmx-ciu-defs.h> 60 #include <asm/octeon/cvmx-ciu3-defs.h> 61 #include <asm/octeon/cvmx-gpio-defs.h> 62 #include <asm/octeon/cvmx-iob-defs.h> 63 #include <asm/octeon/cvmx-ipd-defs.h> 64 #include <asm/octeon/cvmx-l2c-defs.h> 65 #include <asm/octeon/cvmx-l2d-defs.h> 66 #include <asm/octeon/cvmx-l2t-defs.h> 67 #include <asm/octeon/cvmx-led-defs.h> 68 #include <asm/octeon/cvmx-mio-defs.h> 69 #include <asm/octeon/cvmx-pow-defs.h> 70 71 #include <asm/octeon/cvmx-bootinfo.h> 72 #include <asm/octeon/cvmx-bootmem.h> 73 #include <asm/octeon/cvmx-l2c.h> 74 75 #ifndef CVMX_ENABLE_DEBUG_PRINTS 76 #define CVMX_ENABLE_DEBUG_PRINTS 1 77 #endif 78 79 #if CVMX_ENABLE_DEBUG_PRINTS 80 #define cvmx_dprintf printk 81 #else 82 #define cvmx_dprintf(...) {} 83 #endif 84 85 #define CVMX_MAX_CORES (16) 86 #define CVMX_CACHE_LINE_SIZE (128) /* In bytes */ 87 #define CVMX_CACHE_LINE_MASK (CVMX_CACHE_LINE_SIZE - 1) /* In bytes */ 88 #define CVMX_CACHE_LINE_ALIGNED __attribute__ ((aligned(CVMX_CACHE_LINE_SIZE))) 89 #define CAST64(v) ((long long)(long)(v)) 90 #define CASTPTR(type, v) ((type *)(long)(v)) 91 92 /* 93 * Returns processor ID, different Linux and simple exec versions 94 * provided in the cvmx-app-init*.c files. 95 */ 96 static inline uint32_t cvmx_get_proc_id(void) __attribute__ ((pure)); 97 static inline uint32_t cvmx_get_proc_id(void) 98 { 99 uint32_t id; 100 asm("mfc0 %0, $15,0" : "=r"(id)); 101 return id; 102 } 103 104 /* turn the variable name into a string */ 105 #define CVMX_TMP_STR(x) CVMX_TMP_STR2(x) 106 #define CVMX_TMP_STR2(x) #x 107 108 /** 109 * Builds a bit mask given the required size in bits. 110 * 111 * @bits: Number of bits in the mask 112 * Returns The mask 113 */ static inline uint64_t cvmx_build_mask(uint64_t bits) 114 { 115 return ~((~0x0ull) << bits); 116 } 117 118 /** 119 * Builds a memory address for I/O based on the Major and Sub DID. 120 * 121 * @major_did: 5 bit major did 122 * @sub_did: 3 bit sub did 123 * Returns I/O base address 124 */ 125 static inline uint64_t cvmx_build_io_address(uint64_t major_did, 126 uint64_t sub_did) 127 { 128 return (0x1ull << 48) | (major_did << 43) | (sub_did << 40); 129 } 130 131 /** 132 * Perform mask and shift to place the supplied value into 133 * the supplied bit rage. 134 * 135 * Example: cvmx_build_bits(39,24,value) 136 * <pre> 137 * 6 5 4 3 3 2 1 138 * 3 5 7 9 1 3 5 7 0 139 * +-------+-------+-------+-------+-------+-------+-------+------+ 140 * 000000000000000000000000___________value000000000000000000000000 141 * </pre> 142 * 143 * @high_bit: Highest bit value can occupy (inclusive) 0-63 144 * @low_bit: Lowest bit value can occupy inclusive 0-high_bit 145 * @value: Value to use 146 * Returns Value masked and shifted 147 */ 148 static inline uint64_t cvmx_build_bits(uint64_t high_bit, 149 uint64_t low_bit, uint64_t value) 150 { 151 return (value & cvmx_build_mask(high_bit - low_bit + 1)) << low_bit; 152 } 153 154 /** 155 * Convert a memory pointer (void*) into a hardware compatible 156 * memory address (uint64_t). Octeon hardware widgets don't 157 * understand logical addresses. 158 * 159 * @ptr: C style memory pointer 160 * Returns Hardware physical address 161 */ 162 static inline uint64_t cvmx_ptr_to_phys(void *ptr) 163 { 164 if (sizeof(void *) == 8) { 165 /* 166 * We're running in 64 bit mode. Normally this means 167 * that we can use 40 bits of address space (the 168 * hardware limit). Unfortunately there is one case 169 * were we need to limit this to 30 bits, sign 170 * extended 32 bit. Although these are 64 bits wide, 171 * only 30 bits can be used. 172 */ 173 if ((CAST64(ptr) >> 62) == 3) 174 return CAST64(ptr) & cvmx_build_mask(30); 175 else 176 return CAST64(ptr) & cvmx_build_mask(40); 177 } else { 178 return (long)(ptr) & 0x1fffffff; 179 } 180 } 181 182 /** 183 * Convert a hardware physical address (uint64_t) into a 184 * memory pointer (void *). 185 * 186 * @physical_address: 187 * Hardware physical address to memory 188 * Returns Pointer to memory 189 */ 190 static inline void *cvmx_phys_to_ptr(uint64_t physical_address) 191 { 192 if (sizeof(void *) == 8) { 193 /* Just set the top bit, avoiding any TLB ugliness */ 194 return CASTPTR(void, 195 CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, 196 physical_address)); 197 } else { 198 return CASTPTR(void, 199 CVMX_ADD_SEG32(CVMX_MIPS32_SPACE_KSEG0, 200 physical_address)); 201 } 202 } 203 204 /* The following #if controls the definition of the macro 205 CVMX_BUILD_WRITE64. This macro is used to build a store operation to 206 a full 64bit address. With a 64bit ABI, this can be done with a simple 207 pointer access. 32bit ABIs require more complicated assembly */ 208 209 /* We have a full 64bit ABI. Writing to a 64bit address can be done with 210 a simple volatile pointer */ 211 #define CVMX_BUILD_WRITE64(TYPE, ST) \ 212 static inline void cvmx_write64_##TYPE(uint64_t addr, TYPE##_t val) \ 213 { \ 214 *CASTPTR(volatile TYPE##_t, addr) = val; \ 215 } 216 217 218 /* The following #if controls the definition of the macro 219 CVMX_BUILD_READ64. This macro is used to build a load operation from 220 a full 64bit address. With a 64bit ABI, this can be done with a simple 221 pointer access. 32bit ABIs require more complicated assembly */ 222 223 /* We have a full 64bit ABI. Writing to a 64bit address can be done with 224 a simple volatile pointer */ 225 #define CVMX_BUILD_READ64(TYPE, LT) \ 226 static inline TYPE##_t cvmx_read64_##TYPE(uint64_t addr) \ 227 { \ 228 return *CASTPTR(volatile TYPE##_t, addr); \ 229 } 230 231 232 /* The following defines 8 functions for writing to a 64bit address. Each 233 takes two arguments, the address and the value to write. 234 cvmx_write64_int64 cvmx_write64_uint64 235 cvmx_write64_int32 cvmx_write64_uint32 236 cvmx_write64_int16 cvmx_write64_uint16 237 cvmx_write64_int8 cvmx_write64_uint8 */ 238 CVMX_BUILD_WRITE64(int64, "sd"); 239 CVMX_BUILD_WRITE64(int32, "sw"); 240 CVMX_BUILD_WRITE64(int16, "sh"); 241 CVMX_BUILD_WRITE64(int8, "sb"); 242 CVMX_BUILD_WRITE64(uint64, "sd"); 243 CVMX_BUILD_WRITE64(uint32, "sw"); 244 CVMX_BUILD_WRITE64(uint16, "sh"); 245 CVMX_BUILD_WRITE64(uint8, "sb"); 246 #define cvmx_write64 cvmx_write64_uint64 247 248 /* The following defines 8 functions for reading from a 64bit address. Each 249 takes the address as the only argument 250 cvmx_read64_int64 cvmx_read64_uint64 251 cvmx_read64_int32 cvmx_read64_uint32 252 cvmx_read64_int16 cvmx_read64_uint16 253 cvmx_read64_int8 cvmx_read64_uint8 */ 254 CVMX_BUILD_READ64(int64, "ld"); 255 CVMX_BUILD_READ64(int32, "lw"); 256 CVMX_BUILD_READ64(int16, "lh"); 257 CVMX_BUILD_READ64(int8, "lb"); 258 CVMX_BUILD_READ64(uint64, "ld"); 259 CVMX_BUILD_READ64(uint32, "lw"); 260 CVMX_BUILD_READ64(uint16, "lhu"); 261 CVMX_BUILD_READ64(uint8, "lbu"); 262 #define cvmx_read64 cvmx_read64_uint64 263 264 265 static inline void cvmx_write_csr(uint64_t csr_addr, uint64_t val) 266 { 267 cvmx_write64(csr_addr, val); 268 269 /* 270 * Perform an immediate read after every write to an RSL 271 * register to force the write to complete. It doesn't matter 272 * what RSL read we do, so we choose CVMX_MIO_BOOT_BIST_STAT 273 * because it is fast and harmless. 274 */ 275 if (((csr_addr >> 40) & 0x7ffff) == (0x118)) 276 cvmx_read64(CVMX_MIO_BOOT_BIST_STAT); 277 } 278 279 static inline void cvmx_writeq_csr(void __iomem *csr_addr, uint64_t val) 280 { 281 cvmx_write_csr((__force uint64_t)csr_addr, val); 282 } 283 284 static inline void cvmx_write_io(uint64_t io_addr, uint64_t val) 285 { 286 cvmx_write64(io_addr, val); 287 288 } 289 290 static inline uint64_t cvmx_read_csr(uint64_t csr_addr) 291 { 292 uint64_t val = cvmx_read64(csr_addr); 293 return val; 294 } 295 296 static inline uint64_t cvmx_readq_csr(void __iomem *csr_addr) 297 { 298 return cvmx_read_csr((__force uint64_t) csr_addr); 299 } 300 301 static inline void cvmx_send_single(uint64_t data) 302 { 303 const uint64_t CVMX_IOBDMA_SENDSINGLE = 0xffffffffffffa200ull; 304 cvmx_write64(CVMX_IOBDMA_SENDSINGLE, data); 305 } 306 307 static inline void cvmx_read_csr_async(uint64_t scraddr, uint64_t csr_addr) 308 { 309 union { 310 uint64_t u64; 311 struct { 312 uint64_t scraddr:8; 313 uint64_t len:8; 314 uint64_t addr:48; 315 } s; 316 } addr; 317 addr.u64 = csr_addr; 318 addr.s.scraddr = scraddr >> 3; 319 addr.s.len = 1; 320 cvmx_send_single(addr.u64); 321 } 322 323 /* Return true if Octeon is CN38XX pass 1 */ 324 static inline int cvmx_octeon_is_pass1(void) 325 { 326 #if OCTEON_IS_COMMON_BINARY() 327 return 0; /* Pass 1 isn't supported for common binaries */ 328 #else 329 /* Now that we know we're built for a specific model, only check CN38XX */ 330 #if OCTEON_IS_MODEL(OCTEON_CN38XX) 331 return cvmx_get_proc_id() == OCTEON_CN38XX_PASS1; 332 #else 333 return 0; /* Built for non CN38XX chip, we're not CN38XX pass1 */ 334 #endif 335 #endif 336 } 337 338 static inline unsigned int cvmx_get_core_num(void) 339 { 340 unsigned int core_num; 341 CVMX_RDHWRNV(core_num, 0); 342 return core_num; 343 } 344 345 /* Maximum # of bits to define core in node */ 346 #define CVMX_NODE_NO_SHIFT 7 347 #define CVMX_NODE_MASK 0x3 348 static inline unsigned int cvmx_get_node_num(void) 349 { 350 unsigned int core_num = cvmx_get_core_num(); 351 352 return (core_num >> CVMX_NODE_NO_SHIFT) & CVMX_NODE_MASK; 353 } 354 355 static inline unsigned int cvmx_get_local_core_num(void) 356 { 357 return cvmx_get_core_num() & ((1 << CVMX_NODE_NO_SHIFT) - 1); 358 } 359 360 /** 361 * Returns the number of bits set in the provided value. 362 * Simple wrapper for POP instruction. 363 * 364 * @val: 32 bit value to count set bits in 365 * 366 * Returns Number of bits set 367 */ 368 static inline uint32_t cvmx_pop(uint32_t val) 369 { 370 uint32_t pop; 371 CVMX_POP(pop, val); 372 return pop; 373 } 374 375 /** 376 * Returns the number of bits set in the provided value. 377 * Simple wrapper for DPOP instruction. 378 * 379 * @val: 64 bit value to count set bits in 380 * 381 * Returns Number of bits set 382 */ 383 static inline int cvmx_dpop(uint64_t val) 384 { 385 int pop; 386 CVMX_DPOP(pop, val); 387 return pop; 388 } 389 390 /** 391 * Provide current cycle counter as a return value 392 * 393 * Returns current cycle counter 394 */ 395 396 static inline uint64_t cvmx_get_cycle(void) 397 { 398 uint64_t cycle; 399 CVMX_RDHWR(cycle, 31); 400 return cycle; 401 } 402 403 /** 404 * Wait for the specified number of cycle 405 * 406 */ 407 static inline void cvmx_wait(uint64_t cycles) 408 { 409 uint64_t done = cvmx_get_cycle() + cycles; 410 411 while (cvmx_get_cycle() < done) 412 ; /* Spin */ 413 } 414 415 /** 416 * Reads a chip global cycle counter. This counts CPU cycles since 417 * chip reset. The counter is 64 bit. 418 * This register does not exist on CN38XX pass 1 silicion 419 * 420 * Returns Global chip cycle count since chip reset. 421 */ 422 static inline uint64_t cvmx_get_cycle_global(void) 423 { 424 if (cvmx_octeon_is_pass1()) 425 return 0; 426 else 427 return cvmx_read64(CVMX_IPD_CLK_COUNT); 428 } 429 430 /** 431 * This macro spins on a field waiting for it to reach a value. It 432 * is common in code to need to wait for a specific field in a CSR 433 * to match a specific value. Conceptually this macro expands to: 434 * 435 * 1) read csr at "address" with a csr typedef of "type" 436 * 2) Check if ("type".s."field" "op" "value") 437 * 3) If #2 isn't true loop to #1 unless too much time has passed. 438 */ 439 #define CVMX_WAIT_FOR_FIELD64(address, type, field, op, value, timeout_usec)\ 440 ( \ 441 { \ 442 int result; \ 443 do { \ 444 uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \ 445 cvmx_sysinfo_get()->cpu_clock_hz / 1000000; \ 446 type c; \ 447 while (1) { \ 448 c.u64 = cvmx_read_csr(address); \ 449 if ((c.s.field) op(value)) { \ 450 result = 0; \ 451 break; \ 452 } else if (cvmx_get_cycle() > done) { \ 453 result = -1; \ 454 break; \ 455 } else \ 456 cvmx_wait(100); \ 457 } \ 458 } while (0); \ 459 result; \ 460 }) 461 462 /***************************************************************************/ 463 464 /* Return the number of cores available in the chip */ 465 static inline uint32_t cvmx_octeon_num_cores(void) 466 { 467 u64 ciu_fuse_reg; 468 u64 ciu_fuse; 469 470 if (OCTEON_IS_OCTEON3() && !OCTEON_IS_MODEL(OCTEON_CN70XX)) 471 ciu_fuse_reg = CVMX_CIU3_FUSE; 472 else 473 ciu_fuse_reg = CVMX_CIU_FUSE; 474 ciu_fuse = cvmx_read_csr(ciu_fuse_reg); 475 return cvmx_dpop(ciu_fuse); 476 } 477 478 #endif /* __CVMX_H__ */ 479