1 /* 2 * Procedures for interfacing to Open Firmware. 3 * 4 * Paul Mackerras August 1996. 5 * Copyright (C) 1996-2005 Paul Mackerras. 6 * 7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. 8 * {engebret|bergner}@us.ibm.com 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 */ 15 16 #undef DEBUG_PROM 17 18 #include <stdarg.h> 19 #include <linux/kernel.h> 20 #include <linux/string.h> 21 #include <linux/init.h> 22 #include <linux/threads.h> 23 #include <linux/spinlock.h> 24 #include <linux/types.h> 25 #include <linux/pci.h> 26 #include <linux/proc_fs.h> 27 #include <linux/stringify.h> 28 #include <linux/delay.h> 29 #include <linux/initrd.h> 30 #include <linux/bitops.h> 31 #include <asm/prom.h> 32 #include <asm/rtas.h> 33 #include <asm/page.h> 34 #include <asm/processor.h> 35 #include <asm/irq.h> 36 #include <asm/io.h> 37 #include <asm/smp.h> 38 #include <asm/mmu.h> 39 #include <asm/pgtable.h> 40 #include <asm/pci.h> 41 #include <asm/iommu.h> 42 #include <asm/btext.h> 43 #include <asm/sections.h> 44 #include <asm/machdep.h> 45 #include <asm/opal.h> 46 47 #include <linux/linux_logo.h> 48 49 /* 50 * Eventually bump that one up 51 */ 52 #define DEVTREE_CHUNK_SIZE 0x100000 53 54 /* 55 * This is the size of the local memory reserve map that gets copied 56 * into the boot params passed to the kernel. That size is totally 57 * flexible as the kernel just reads the list until it encounters an 58 * entry with size 0, so it can be changed without breaking binary 59 * compatibility 60 */ 61 #define MEM_RESERVE_MAP_SIZE 8 62 63 /* 64 * prom_init() is called very early on, before the kernel text 65 * and data have been mapped to KERNELBASE. At this point the code 66 * is running at whatever address it has been loaded at. 67 * On ppc32 we compile with -mrelocatable, which means that references 68 * to extern and static variables get relocated automatically. 69 * On ppc64 we have to relocate the references explicitly with 70 * RELOC. (Note that strings count as static variables.) 71 * 72 * Because OF may have mapped I/O devices into the area starting at 73 * KERNELBASE, particularly on CHRP machines, we can't safely call 74 * OF once the kernel has been mapped to KERNELBASE. Therefore all 75 * OF calls must be done within prom_init(). 76 * 77 * ADDR is used in calls to call_prom. The 4th and following 78 * arguments to call_prom should be 32-bit values. 79 * On ppc64, 64 bit values are truncated to 32 bits (and 80 * fortunately don't get interpreted as two arguments). 81 */ 82 #ifdef CONFIG_PPC64 83 #define RELOC(x) (*PTRRELOC(&(x))) 84 #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) 85 #define OF_WORKAROUNDS 0 86 #else 87 #define RELOC(x) (x) 88 #define ADDR(x) (u32) (x) 89 #define OF_WORKAROUNDS of_workarounds 90 int of_workarounds; 91 #endif 92 93 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ 94 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ 95 96 #define PROM_BUG() do { \ 97 prom_printf("kernel BUG at %s line 0x%x!\n", \ 98 RELOC(__FILE__), __LINE__); \ 99 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ 100 } while (0) 101 102 #ifdef DEBUG_PROM 103 #define prom_debug(x...) prom_printf(x) 104 #else 105 #define prom_debug(x...) 106 #endif 107 108 109 typedef u32 prom_arg_t; 110 111 struct prom_args { 112 u32 service; 113 u32 nargs; 114 u32 nret; 115 prom_arg_t args[10]; 116 }; 117 118 struct prom_t { 119 ihandle root; 120 phandle chosen; 121 int cpu; 122 ihandle stdout; 123 ihandle mmumap; 124 ihandle memory; 125 }; 126 127 struct mem_map_entry { 128 u64 base; 129 u64 size; 130 }; 131 132 typedef u32 cell_t; 133 134 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5, 135 unsigned long r6, unsigned long r7, unsigned long r8, 136 unsigned long r9); 137 138 #ifdef CONFIG_PPC64 139 extern int enter_prom(struct prom_args *args, unsigned long entry); 140 #else 141 static inline int enter_prom(struct prom_args *args, unsigned long entry) 142 { 143 return ((int (*)(struct prom_args *))entry)(args); 144 } 145 #endif 146 147 extern void copy_and_flush(unsigned long dest, unsigned long src, 148 unsigned long size, unsigned long offset); 149 150 /* prom structure */ 151 static struct prom_t __initdata prom; 152 153 static unsigned long prom_entry __initdata; 154 155 #define PROM_SCRATCH_SIZE 256 156 157 static char __initdata of_stdout_device[256]; 158 static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; 159 160 static unsigned long __initdata dt_header_start; 161 static unsigned long __initdata dt_struct_start, dt_struct_end; 162 static unsigned long __initdata dt_string_start, dt_string_end; 163 164 static unsigned long __initdata prom_initrd_start, prom_initrd_end; 165 166 #ifdef CONFIG_PPC64 167 static int __initdata prom_iommu_force_on; 168 static int __initdata prom_iommu_off; 169 static unsigned long __initdata prom_tce_alloc_start; 170 static unsigned long __initdata prom_tce_alloc_end; 171 #endif 172 173 /* Platforms codes are now obsolete in the kernel. Now only used within this 174 * file and ultimately gone too. Feel free to change them if you need, they 175 * are not shared with anything outside of this file anymore 176 */ 177 #define PLATFORM_PSERIES 0x0100 178 #define PLATFORM_PSERIES_LPAR 0x0101 179 #define PLATFORM_LPAR 0x0001 180 #define PLATFORM_POWERMAC 0x0400 181 #define PLATFORM_GENERIC 0x0500 182 #define PLATFORM_OPAL 0x0600 183 184 static int __initdata of_platform; 185 186 static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; 187 188 static unsigned long __initdata prom_memory_limit; 189 190 static unsigned long __initdata alloc_top; 191 static unsigned long __initdata alloc_top_high; 192 static unsigned long __initdata alloc_bottom; 193 static unsigned long __initdata rmo_top; 194 static unsigned long __initdata ram_top; 195 196 static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; 197 static int __initdata mem_reserve_cnt; 198 199 static cell_t __initdata regbuf[1024]; 200 201 202 /* 203 * Error results ... some OF calls will return "-1" on error, some 204 * will return 0, some will return either. To simplify, here are 205 * macros to use with any ihandle or phandle return value to check if 206 * it is valid 207 */ 208 209 #define PROM_ERROR (-1u) 210 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) 211 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) 212 213 214 /* This is the one and *ONLY* place where we actually call open 215 * firmware. 216 */ 217 218 static int __init call_prom(const char *service, int nargs, int nret, ...) 219 { 220 int i; 221 struct prom_args args; 222 va_list list; 223 224 args.service = ADDR(service); 225 args.nargs = nargs; 226 args.nret = nret; 227 228 va_start(list, nret); 229 for (i = 0; i < nargs; i++) 230 args.args[i] = va_arg(list, prom_arg_t); 231 va_end(list); 232 233 for (i = 0; i < nret; i++) 234 args.args[nargs+i] = 0; 235 236 if (enter_prom(&args, RELOC(prom_entry)) < 0) 237 return PROM_ERROR; 238 239 return (nret > 0) ? args.args[nargs] : 0; 240 } 241 242 static int __init call_prom_ret(const char *service, int nargs, int nret, 243 prom_arg_t *rets, ...) 244 { 245 int i; 246 struct prom_args args; 247 va_list list; 248 249 args.service = ADDR(service); 250 args.nargs = nargs; 251 args.nret = nret; 252 253 va_start(list, rets); 254 for (i = 0; i < nargs; i++) 255 args.args[i] = va_arg(list, prom_arg_t); 256 va_end(list); 257 258 for (i = 0; i < nret; i++) 259 args.args[nargs+i] = 0; 260 261 if (enter_prom(&args, RELOC(prom_entry)) < 0) 262 return PROM_ERROR; 263 264 if (rets != NULL) 265 for (i = 1; i < nret; ++i) 266 rets[i-1] = args.args[nargs+i]; 267 268 return (nret > 0) ? args.args[nargs] : 0; 269 } 270 271 272 static void __init prom_print(const char *msg) 273 { 274 const char *p, *q; 275 struct prom_t *_prom = &RELOC(prom); 276 277 if (_prom->stdout == 0) 278 return; 279 280 for (p = msg; *p != 0; p = q) { 281 for (q = p; *q != 0 && *q != '\n'; ++q) 282 ; 283 if (q > p) 284 call_prom("write", 3, 1, _prom->stdout, p, q - p); 285 if (*q == 0) 286 break; 287 ++q; 288 call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); 289 } 290 } 291 292 293 static void __init prom_print_hex(unsigned long val) 294 { 295 int i, nibbles = sizeof(val)*2; 296 char buf[sizeof(val)*2+1]; 297 struct prom_t *_prom = &RELOC(prom); 298 299 for (i = nibbles-1; i >= 0; i--) { 300 buf[i] = (val & 0xf) + '0'; 301 if (buf[i] > '9') 302 buf[i] += ('a'-'0'-10); 303 val >>= 4; 304 } 305 buf[nibbles] = '\0'; 306 call_prom("write", 3, 1, _prom->stdout, buf, nibbles); 307 } 308 309 /* max number of decimal digits in an unsigned long */ 310 #define UL_DIGITS 21 311 static void __init prom_print_dec(unsigned long val) 312 { 313 int i, size; 314 char buf[UL_DIGITS+1]; 315 struct prom_t *_prom = &RELOC(prom); 316 317 for (i = UL_DIGITS-1; i >= 0; i--) { 318 buf[i] = (val % 10) + '0'; 319 val = val/10; 320 if (val == 0) 321 break; 322 } 323 /* shift stuff down */ 324 size = UL_DIGITS - i; 325 call_prom("write", 3, 1, _prom->stdout, buf+i, size); 326 } 327 328 static void __init prom_printf(const char *format, ...) 329 { 330 const char *p, *q, *s; 331 va_list args; 332 unsigned long v; 333 long vs; 334 struct prom_t *_prom = &RELOC(prom); 335 336 va_start(args, format); 337 #ifdef CONFIG_PPC64 338 format = PTRRELOC(format); 339 #endif 340 for (p = format; *p != 0; p = q) { 341 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) 342 ; 343 if (q > p) 344 call_prom("write", 3, 1, _prom->stdout, p, q - p); 345 if (*q == 0) 346 break; 347 if (*q == '\n') { 348 ++q; 349 call_prom("write", 3, 1, _prom->stdout, 350 ADDR("\r\n"), 2); 351 continue; 352 } 353 ++q; 354 if (*q == 0) 355 break; 356 switch (*q) { 357 case 's': 358 ++q; 359 s = va_arg(args, const char *); 360 prom_print(s); 361 break; 362 case 'x': 363 ++q; 364 v = va_arg(args, unsigned long); 365 prom_print_hex(v); 366 break; 367 case 'd': 368 ++q; 369 vs = va_arg(args, int); 370 if (vs < 0) { 371 prom_print(RELOC("-")); 372 vs = -vs; 373 } 374 prom_print_dec(vs); 375 break; 376 case 'l': 377 ++q; 378 if (*q == 0) 379 break; 380 else if (*q == 'x') { 381 ++q; 382 v = va_arg(args, unsigned long); 383 prom_print_hex(v); 384 } else if (*q == 'u') { /* '%lu' */ 385 ++q; 386 v = va_arg(args, unsigned long); 387 prom_print_dec(v); 388 } else if (*q == 'd') { /* %ld */ 389 ++q; 390 vs = va_arg(args, long); 391 if (vs < 0) { 392 prom_print(RELOC("-")); 393 vs = -vs; 394 } 395 prom_print_dec(vs); 396 } 397 break; 398 } 399 } 400 } 401 402 403 static unsigned int __init prom_claim(unsigned long virt, unsigned long size, 404 unsigned long align) 405 { 406 struct prom_t *_prom = &RELOC(prom); 407 408 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { 409 /* 410 * Old OF requires we claim physical and virtual separately 411 * and then map explicitly (assuming virtual mode) 412 */ 413 int ret; 414 prom_arg_t result; 415 416 ret = call_prom_ret("call-method", 5, 2, &result, 417 ADDR("claim"), _prom->memory, 418 align, size, virt); 419 if (ret != 0 || result == -1) 420 return -1; 421 ret = call_prom_ret("call-method", 5, 2, &result, 422 ADDR("claim"), _prom->mmumap, 423 align, size, virt); 424 if (ret != 0) { 425 call_prom("call-method", 4, 1, ADDR("release"), 426 _prom->memory, size, virt); 427 return -1; 428 } 429 /* the 0x12 is M (coherence) + PP == read/write */ 430 call_prom("call-method", 6, 1, 431 ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); 432 return virt; 433 } 434 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, 435 (prom_arg_t)align); 436 } 437 438 static void __init __attribute__((noreturn)) prom_panic(const char *reason) 439 { 440 #ifdef CONFIG_PPC64 441 reason = PTRRELOC(reason); 442 #endif 443 prom_print(reason); 444 /* Do not call exit because it clears the screen on pmac 445 * it also causes some sort of double-fault on early pmacs */ 446 if (RELOC(of_platform) == PLATFORM_POWERMAC) 447 asm("trap\n"); 448 449 /* ToDo: should put up an SRC here on pSeries */ 450 call_prom("exit", 0, 0); 451 452 for (;;) /* should never get here */ 453 ; 454 } 455 456 457 static int __init prom_next_node(phandle *nodep) 458 { 459 phandle node; 460 461 if ((node = *nodep) != 0 462 && (*nodep = call_prom("child", 1, 1, node)) != 0) 463 return 1; 464 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 465 return 1; 466 for (;;) { 467 if ((node = call_prom("parent", 1, 1, node)) == 0) 468 return 0; 469 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 470 return 1; 471 } 472 } 473 474 static int inline prom_getprop(phandle node, const char *pname, 475 void *value, size_t valuelen) 476 { 477 return call_prom("getprop", 4, 1, node, ADDR(pname), 478 (u32)(unsigned long) value, (u32) valuelen); 479 } 480 481 static int inline prom_getproplen(phandle node, const char *pname) 482 { 483 return call_prom("getproplen", 2, 1, node, ADDR(pname)); 484 } 485 486 static void add_string(char **str, const char *q) 487 { 488 char *p = *str; 489 490 while (*q) 491 *p++ = *q++; 492 *p++ = ' '; 493 *str = p; 494 } 495 496 static char *tohex(unsigned int x) 497 { 498 static char digits[] = "0123456789abcdef"; 499 static char result[9]; 500 int i; 501 502 result[8] = 0; 503 i = 8; 504 do { 505 --i; 506 result[i] = digits[x & 0xf]; 507 x >>= 4; 508 } while (x != 0 && i > 0); 509 return &result[i]; 510 } 511 512 static int __init prom_setprop(phandle node, const char *nodename, 513 const char *pname, void *value, size_t valuelen) 514 { 515 char cmd[256], *p; 516 517 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) 518 return call_prom("setprop", 4, 1, node, ADDR(pname), 519 (u32)(unsigned long) value, (u32) valuelen); 520 521 /* gah... setprop doesn't work on longtrail, have to use interpret */ 522 p = cmd; 523 add_string(&p, "dev"); 524 add_string(&p, nodename); 525 add_string(&p, tohex((u32)(unsigned long) value)); 526 add_string(&p, tohex(valuelen)); 527 add_string(&p, tohex(ADDR(pname))); 528 add_string(&p, tohex(strlen(RELOC(pname)))); 529 add_string(&p, "property"); 530 *p = 0; 531 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); 532 } 533 534 /* We can't use the standard versions because of RELOC headaches. */ 535 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ 536 || ('a' <= (c) && (c) <= 'f') \ 537 || ('A' <= (c) && (c) <= 'F')) 538 539 #define isdigit(c) ('0' <= (c) && (c) <= '9') 540 #define islower(c) ('a' <= (c) && (c) <= 'z') 541 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) 542 543 unsigned long prom_strtoul(const char *cp, const char **endp) 544 { 545 unsigned long result = 0, base = 10, value; 546 547 if (*cp == '0') { 548 base = 8; 549 cp++; 550 if (toupper(*cp) == 'X') { 551 cp++; 552 base = 16; 553 } 554 } 555 556 while (isxdigit(*cp) && 557 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { 558 result = result * base + value; 559 cp++; 560 } 561 562 if (endp) 563 *endp = cp; 564 565 return result; 566 } 567 568 unsigned long prom_memparse(const char *ptr, const char **retptr) 569 { 570 unsigned long ret = prom_strtoul(ptr, retptr); 571 int shift = 0; 572 573 /* 574 * We can't use a switch here because GCC *may* generate a 575 * jump table which won't work, because we're not running at 576 * the address we're linked at. 577 */ 578 if ('G' == **retptr || 'g' == **retptr) 579 shift = 30; 580 581 if ('M' == **retptr || 'm' == **retptr) 582 shift = 20; 583 584 if ('K' == **retptr || 'k' == **retptr) 585 shift = 10; 586 587 if (shift) { 588 ret <<= shift; 589 (*retptr)++; 590 } 591 592 return ret; 593 } 594 595 /* 596 * Early parsing of the command line passed to the kernel, used for 597 * "mem=x" and the options that affect the iommu 598 */ 599 static void __init early_cmdline_parse(void) 600 { 601 struct prom_t *_prom = &RELOC(prom); 602 const char *opt; 603 604 char *p; 605 int l = 0; 606 607 RELOC(prom_cmd_line[0]) = 0; 608 p = RELOC(prom_cmd_line); 609 if ((long)_prom->chosen > 0) 610 l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); 611 #ifdef CONFIG_CMDLINE 612 if (l <= 0 || p[0] == '\0') /* dbl check */ 613 strlcpy(RELOC(prom_cmd_line), 614 RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); 615 #endif /* CONFIG_CMDLINE */ 616 prom_printf("command line: %s\n", RELOC(prom_cmd_line)); 617 618 #ifdef CONFIG_PPC64 619 opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); 620 if (opt) { 621 prom_printf("iommu opt is: %s\n", opt); 622 opt += 6; 623 while (*opt && *opt == ' ') 624 opt++; 625 if (!strncmp(opt, RELOC("off"), 3)) 626 RELOC(prom_iommu_off) = 1; 627 else if (!strncmp(opt, RELOC("force"), 5)) 628 RELOC(prom_iommu_force_on) = 1; 629 } 630 #endif 631 opt = strstr(RELOC(prom_cmd_line), RELOC("mem=")); 632 if (opt) { 633 opt += 4; 634 RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt); 635 #ifdef CONFIG_PPC64 636 /* Align to 16 MB == size of ppc64 large page */ 637 RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); 638 #endif 639 } 640 } 641 642 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 643 /* 644 * There are two methods for telling firmware what our capabilities are. 645 * Newer machines have an "ibm,client-architecture-support" method on the 646 * root node. For older machines, we have to call the "process-elf-header" 647 * method in the /packages/elf-loader node, passing it a fake 32-bit 648 * ELF header containing a couple of PT_NOTE sections that contain 649 * structures that contain various information. 650 */ 651 652 /* 653 * New method - extensible architecture description vector. 654 * 655 * Because the description vector contains a mix of byte and word 656 * values, we declare it as an unsigned char array, and use this 657 * macro to put word values in. 658 */ 659 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ 660 ((x) >> 8) & 0xff, (x) & 0xff 661 662 /* Option vector bits - generic bits in byte 1 */ 663 #define OV_IGNORE 0x80 /* ignore this vector */ 664 #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ 665 666 /* Option vector 1: processor architectures supported */ 667 #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ 668 #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ 669 #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ 670 #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ 671 #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ 672 #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ 673 #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */ 674 675 /* Option vector 2: Open Firmware options supported */ 676 #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ 677 678 /* Option vector 3: processor options supported */ 679 #define OV3_FP 0x80 /* floating point */ 680 #define OV3_VMX 0x40 /* VMX/Altivec */ 681 #define OV3_DFP 0x20 /* decimal FP */ 682 683 /* Option vector 4: IBM PAPR implementation */ 684 #define OV4_MIN_ENT_CAP 0x01 /* minimum VP entitled capacity */ 685 686 /* Option vector 5: PAPR/OF options supported */ 687 #define OV5_LPAR 0x80 /* logical partitioning supported */ 688 #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ 689 /* ibm,dynamic-reconfiguration-memory property supported */ 690 #define OV5_DRCONF_MEMORY 0x20 691 #define OV5_LARGE_PAGES 0x10 /* large pages supported */ 692 #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */ 693 /* PCIe/MSI support. Without MSI full PCIe is not supported */ 694 #ifdef CONFIG_PCI_MSI 695 #define OV5_MSI 0x01 /* PCIe/MSI support */ 696 #else 697 #define OV5_MSI 0x00 698 #endif /* CONFIG_PCI_MSI */ 699 #ifdef CONFIG_PPC_SMLPAR 700 #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */ 701 #define OV5_XCMO 0x40 /* Page Coalescing */ 702 #else 703 #define OV5_CMO 0x00 704 #define OV5_XCMO 0x00 705 #endif 706 #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */ 707 #define OV5_PFO_HW_RNG 0x80 /* PFO Random Number Generator */ 708 #define OV5_PFO_HW_842 0x40 /* PFO Compression Accelerator */ 709 #define OV5_PFO_HW_ENCR 0x20 /* PFO Encryption Accelerator */ 710 711 /* Option Vector 6: IBM PAPR hints */ 712 #define OV6_LINUX 0x02 /* Linux is our OS */ 713 714 /* 715 * The architecture vector has an array of PVR mask/value pairs, 716 * followed by # option vectors - 1, followed by the option vectors. 717 */ 718 static unsigned char ibm_architecture_vec[] = { 719 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ 720 W(0xffff0000), W(0x003e0000), /* POWER6 */ 721 W(0xffff0000), W(0x003f0000), /* POWER7 */ 722 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ 723 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ 724 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ 725 6 - 1, /* 6 option vectors */ 726 727 /* option vector 1: processor architectures supported */ 728 3 - 2, /* length */ 729 0, /* don't ignore, don't halt */ 730 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | 731 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06, 732 733 /* option vector 2: Open Firmware options supported */ 734 34 - 2, /* length */ 735 OV2_REAL_MODE, 736 0, 0, 737 W(0xffffffff), /* real_base */ 738 W(0xffffffff), /* real_size */ 739 W(0xffffffff), /* virt_base */ 740 W(0xffffffff), /* virt_size */ 741 W(0xffffffff), /* load_base */ 742 W(256), /* 256MB min RMA */ 743 W(0xffffffff), /* full client load */ 744 0, /* min RMA percentage of total RAM */ 745 48, /* max log_2(hash table size) */ 746 747 /* option vector 3: processor options supported */ 748 3 - 2, /* length */ 749 0, /* don't ignore, don't halt */ 750 OV3_FP | OV3_VMX | OV3_DFP, 751 752 /* option vector 4: IBM PAPR implementation */ 753 3 - 2, /* length */ 754 0, /* don't halt */ 755 OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */ 756 757 /* option vector 5: PAPR/OF options */ 758 18 - 2, /* length */ 759 0, /* don't ignore, don't halt */ 760 OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | 761 OV5_DONATE_DEDICATE_CPU | OV5_MSI, 762 0, 763 OV5_CMO | OV5_XCMO, 764 OV5_TYPE1_AFFINITY, 765 0, 766 0, 767 0, 768 /* WARNING: The offset of the "number of cores" field below 769 * must match by the macro below. Update the definition if 770 * the structure layout changes. 771 */ 772 #define IBM_ARCH_VEC_NRCORES_OFFSET 101 773 W(NR_CPUS), /* number of cores supported */ 774 0, 775 0, 776 0, 777 0, 778 OV5_PFO_HW_RNG | OV5_PFO_HW_ENCR | OV5_PFO_HW_842, 779 /* option vector 6: IBM PAPR hints */ 780 4 - 2, /* length */ 781 0, 782 0, 783 OV6_LINUX, 784 785 }; 786 787 /* Old method - ELF header with PT_NOTE sections */ 788 static struct fake_elf { 789 Elf32_Ehdr elfhdr; 790 Elf32_Phdr phdr[2]; 791 struct chrpnote { 792 u32 namesz; 793 u32 descsz; 794 u32 type; 795 char name[8]; /* "PowerPC" */ 796 struct chrpdesc { 797 u32 real_mode; 798 u32 real_base; 799 u32 real_size; 800 u32 virt_base; 801 u32 virt_size; 802 u32 load_base; 803 } chrpdesc; 804 } chrpnote; 805 struct rpanote { 806 u32 namesz; 807 u32 descsz; 808 u32 type; 809 char name[24]; /* "IBM,RPA-Client-Config" */ 810 struct rpadesc { 811 u32 lpar_affinity; 812 u32 min_rmo_size; 813 u32 min_rmo_percent; 814 u32 max_pft_size; 815 u32 splpar; 816 u32 min_load; 817 u32 new_mem_def; 818 u32 ignore_me; 819 } rpadesc; 820 } rpanote; 821 } fake_elf = { 822 .elfhdr = { 823 .e_ident = { 0x7f, 'E', 'L', 'F', 824 ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, 825 .e_type = ET_EXEC, /* yeah right */ 826 .e_machine = EM_PPC, 827 .e_version = EV_CURRENT, 828 .e_phoff = offsetof(struct fake_elf, phdr), 829 .e_phentsize = sizeof(Elf32_Phdr), 830 .e_phnum = 2 831 }, 832 .phdr = { 833 [0] = { 834 .p_type = PT_NOTE, 835 .p_offset = offsetof(struct fake_elf, chrpnote), 836 .p_filesz = sizeof(struct chrpnote) 837 }, [1] = { 838 .p_type = PT_NOTE, 839 .p_offset = offsetof(struct fake_elf, rpanote), 840 .p_filesz = sizeof(struct rpanote) 841 } 842 }, 843 .chrpnote = { 844 .namesz = sizeof("PowerPC"), 845 .descsz = sizeof(struct chrpdesc), 846 .type = 0x1275, 847 .name = "PowerPC", 848 .chrpdesc = { 849 .real_mode = ~0U, /* ~0 means "don't care" */ 850 .real_base = ~0U, 851 .real_size = ~0U, 852 .virt_base = ~0U, 853 .virt_size = ~0U, 854 .load_base = ~0U 855 }, 856 }, 857 .rpanote = { 858 .namesz = sizeof("IBM,RPA-Client-Config"), 859 .descsz = sizeof(struct rpadesc), 860 .type = 0x12759999, 861 .name = "IBM,RPA-Client-Config", 862 .rpadesc = { 863 .lpar_affinity = 0, 864 .min_rmo_size = 64, /* in megabytes */ 865 .min_rmo_percent = 0, 866 .max_pft_size = 48, /* 2^48 bytes max PFT size */ 867 .splpar = 1, 868 .min_load = ~0U, 869 .new_mem_def = 0 870 } 871 } 872 }; 873 874 static int __init prom_count_smt_threads(void) 875 { 876 phandle node; 877 char type[64]; 878 unsigned int plen; 879 880 /* Pick up th first CPU node we can find */ 881 for (node = 0; prom_next_node(&node); ) { 882 type[0] = 0; 883 prom_getprop(node, "device_type", type, sizeof(type)); 884 885 if (strcmp(type, RELOC("cpu"))) 886 continue; 887 /* 888 * There is an entry for each smt thread, each entry being 889 * 4 bytes long. All cpus should have the same number of 890 * smt threads, so return after finding the first. 891 */ 892 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); 893 if (plen == PROM_ERROR) 894 break; 895 plen >>= 2; 896 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen); 897 898 /* Sanity check */ 899 if (plen < 1 || plen > 64) { 900 prom_printf("Threads per core %lu out of bounds, assuming 1\n", 901 (unsigned long)plen); 902 return 1; 903 } 904 return plen; 905 } 906 prom_debug("No threads found, assuming 1 per core\n"); 907 908 return 1; 909 910 } 911 912 913 static void __init prom_send_capabilities(void) 914 { 915 ihandle elfloader, root; 916 prom_arg_t ret; 917 u32 *cores; 918 919 root = call_prom("open", 1, 1, ADDR("/")); 920 if (root != 0) { 921 /* We need to tell the FW about the number of cores we support. 922 * 923 * To do that, we count the number of threads on the first core 924 * (we assume this is the same for all cores) and use it to 925 * divide NR_CPUS. 926 */ 927 cores = (u32 *)PTRRELOC(&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]); 928 if (*cores != NR_CPUS) { 929 prom_printf("WARNING ! " 930 "ibm_architecture_vec structure inconsistent: %lu!\n", 931 *cores); 932 } else { 933 *cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); 934 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n", 935 *cores, NR_CPUS); 936 } 937 938 /* try calling the ibm,client-architecture-support method */ 939 prom_printf("Calling ibm,client-architecture-support..."); 940 if (call_prom_ret("call-method", 3, 2, &ret, 941 ADDR("ibm,client-architecture-support"), 942 root, 943 ADDR(ibm_architecture_vec)) == 0) { 944 /* the call exists... */ 945 if (ret) 946 prom_printf("\nWARNING: ibm,client-architecture" 947 "-support call FAILED!\n"); 948 call_prom("close", 1, 0, root); 949 prom_printf(" done\n"); 950 return; 951 } 952 call_prom("close", 1, 0, root); 953 prom_printf(" not implemented\n"); 954 } 955 956 /* no ibm,client-architecture-support call, try the old way */ 957 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); 958 if (elfloader == 0) { 959 prom_printf("couldn't open /packages/elf-loader\n"); 960 return; 961 } 962 call_prom("call-method", 3, 1, ADDR("process-elf-header"), 963 elfloader, ADDR(&fake_elf)); 964 call_prom("close", 1, 0, elfloader); 965 } 966 #endif 967 968 /* 969 * Memory allocation strategy... our layout is normally: 970 * 971 * at 14Mb or more we have vmlinux, then a gap and initrd. In some 972 * rare cases, initrd might end up being before the kernel though. 973 * We assume this won't override the final kernel at 0, we have no 974 * provision to handle that in this version, but it should hopefully 975 * never happen. 976 * 977 * alloc_top is set to the top of RMO, eventually shrink down if the 978 * TCEs overlap 979 * 980 * alloc_bottom is set to the top of kernel/initrd 981 * 982 * from there, allocations are done this way : rtas is allocated 983 * topmost, and the device-tree is allocated from the bottom. We try 984 * to grow the device-tree allocation as we progress. If we can't, 985 * then we fail, we don't currently have a facility to restart 986 * elsewhere, but that shouldn't be necessary. 987 * 988 * Note that calls to reserve_mem have to be done explicitly, memory 989 * allocated with either alloc_up or alloc_down isn't automatically 990 * reserved. 991 */ 992 993 994 /* 995 * Allocates memory in the RMO upward from the kernel/initrd 996 * 997 * When align is 0, this is a special case, it means to allocate in place 998 * at the current location of alloc_bottom or fail (that is basically 999 * extending the previous allocation). Used for the device-tree flattening 1000 */ 1001 static unsigned long __init alloc_up(unsigned long size, unsigned long align) 1002 { 1003 unsigned long base = RELOC(alloc_bottom); 1004 unsigned long addr = 0; 1005 1006 if (align) 1007 base = _ALIGN_UP(base, align); 1008 prom_debug("alloc_up(%x, %x)\n", size, align); 1009 if (RELOC(ram_top) == 0) 1010 prom_panic("alloc_up() called with mem not initialized\n"); 1011 1012 if (align) 1013 base = _ALIGN_UP(RELOC(alloc_bottom), align); 1014 else 1015 base = RELOC(alloc_bottom); 1016 1017 for(; (base + size) <= RELOC(alloc_top); 1018 base = _ALIGN_UP(base + 0x100000, align)) { 1019 prom_debug(" trying: 0x%x\n\r", base); 1020 addr = (unsigned long)prom_claim(base, size, 0); 1021 if (addr != PROM_ERROR && addr != 0) 1022 break; 1023 addr = 0; 1024 if (align == 0) 1025 break; 1026 } 1027 if (addr == 0) 1028 return 0; 1029 RELOC(alloc_bottom) = addr + size; 1030 1031 prom_debug(" -> %x\n", addr); 1032 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 1033 prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); 1034 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 1035 prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); 1036 prom_debug(" ram_top : %x\n", RELOC(ram_top)); 1037 1038 return addr; 1039 } 1040 1041 /* 1042 * Allocates memory downward, either from top of RMO, or if highmem 1043 * is set, from the top of RAM. Note that this one doesn't handle 1044 * failures. It does claim memory if highmem is not set. 1045 */ 1046 static unsigned long __init alloc_down(unsigned long size, unsigned long align, 1047 int highmem) 1048 { 1049 unsigned long base, addr = 0; 1050 1051 prom_debug("alloc_down(%x, %x, %s)\n", size, align, 1052 highmem ? RELOC("(high)") : RELOC("(low)")); 1053 if (RELOC(ram_top) == 0) 1054 prom_panic("alloc_down() called with mem not initialized\n"); 1055 1056 if (highmem) { 1057 /* Carve out storage for the TCE table. */ 1058 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); 1059 if (addr <= RELOC(alloc_bottom)) 1060 return 0; 1061 /* Will we bump into the RMO ? If yes, check out that we 1062 * didn't overlap existing allocations there, if we did, 1063 * we are dead, we must be the first in town ! 1064 */ 1065 if (addr < RELOC(rmo_top)) { 1066 /* Good, we are first */ 1067 if (RELOC(alloc_top) == RELOC(rmo_top)) 1068 RELOC(alloc_top) = RELOC(rmo_top) = addr; 1069 else 1070 return 0; 1071 } 1072 RELOC(alloc_top_high) = addr; 1073 goto bail; 1074 } 1075 1076 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); 1077 for (; base > RELOC(alloc_bottom); 1078 base = _ALIGN_DOWN(base - 0x100000, align)) { 1079 prom_debug(" trying: 0x%x\n\r", base); 1080 addr = (unsigned long)prom_claim(base, size, 0); 1081 if (addr != PROM_ERROR && addr != 0) 1082 break; 1083 addr = 0; 1084 } 1085 if (addr == 0) 1086 return 0; 1087 RELOC(alloc_top) = addr; 1088 1089 bail: 1090 prom_debug(" -> %x\n", addr); 1091 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 1092 prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); 1093 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 1094 prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); 1095 prom_debug(" ram_top : %x\n", RELOC(ram_top)); 1096 1097 return addr; 1098 } 1099 1100 /* 1101 * Parse a "reg" cell 1102 */ 1103 static unsigned long __init prom_next_cell(int s, cell_t **cellp) 1104 { 1105 cell_t *p = *cellp; 1106 unsigned long r = 0; 1107 1108 /* Ignore more than 2 cells */ 1109 while (s > sizeof(unsigned long) / 4) { 1110 p++; 1111 s--; 1112 } 1113 r = *p++; 1114 #ifdef CONFIG_PPC64 1115 if (s > 1) { 1116 r <<= 32; 1117 r |= *(p++); 1118 } 1119 #endif 1120 *cellp = p; 1121 return r; 1122 } 1123 1124 /* 1125 * Very dumb function for adding to the memory reserve list, but 1126 * we don't need anything smarter at this point 1127 * 1128 * XXX Eventually check for collisions. They should NEVER happen. 1129 * If problems seem to show up, it would be a good start to track 1130 * them down. 1131 */ 1132 static void __init reserve_mem(u64 base, u64 size) 1133 { 1134 u64 top = base + size; 1135 unsigned long cnt = RELOC(mem_reserve_cnt); 1136 1137 if (size == 0) 1138 return; 1139 1140 /* We need to always keep one empty entry so that we 1141 * have our terminator with "size" set to 0 since we are 1142 * dumb and just copy this entire array to the boot params 1143 */ 1144 base = _ALIGN_DOWN(base, PAGE_SIZE); 1145 top = _ALIGN_UP(top, PAGE_SIZE); 1146 size = top - base; 1147 1148 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) 1149 prom_panic("Memory reserve map exhausted !\n"); 1150 RELOC(mem_reserve_map)[cnt].base = base; 1151 RELOC(mem_reserve_map)[cnt].size = size; 1152 RELOC(mem_reserve_cnt) = cnt + 1; 1153 } 1154 1155 /* 1156 * Initialize memory allocation mechanism, parse "memory" nodes and 1157 * obtain that way the top of memory and RMO to setup out local allocator 1158 */ 1159 static void __init prom_init_mem(void) 1160 { 1161 phandle node; 1162 char *path, type[64]; 1163 unsigned int plen; 1164 cell_t *p, *endp; 1165 struct prom_t *_prom = &RELOC(prom); 1166 u32 rac, rsc; 1167 1168 /* 1169 * We iterate the memory nodes to find 1170 * 1) top of RMO (first node) 1171 * 2) top of memory 1172 */ 1173 rac = 2; 1174 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); 1175 rsc = 1; 1176 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); 1177 prom_debug("root_addr_cells: %x\n", (unsigned long) rac); 1178 prom_debug("root_size_cells: %x\n", (unsigned long) rsc); 1179 1180 prom_debug("scanning memory:\n"); 1181 path = RELOC(prom_scratch); 1182 1183 for (node = 0; prom_next_node(&node); ) { 1184 type[0] = 0; 1185 prom_getprop(node, "device_type", type, sizeof(type)); 1186 1187 if (type[0] == 0) { 1188 /* 1189 * CHRP Longtrail machines have no device_type 1190 * on the memory node, so check the name instead... 1191 */ 1192 prom_getprop(node, "name", type, sizeof(type)); 1193 } 1194 if (strcmp(type, RELOC("memory"))) 1195 continue; 1196 1197 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); 1198 if (plen > sizeof(regbuf)) { 1199 prom_printf("memory node too large for buffer !\n"); 1200 plen = sizeof(regbuf); 1201 } 1202 p = RELOC(regbuf); 1203 endp = p + (plen / sizeof(cell_t)); 1204 1205 #ifdef DEBUG_PROM 1206 memset(path, 0, PROM_SCRATCH_SIZE); 1207 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 1208 prom_debug(" node %s :\n", path); 1209 #endif /* DEBUG_PROM */ 1210 1211 while ((endp - p) >= (rac + rsc)) { 1212 unsigned long base, size; 1213 1214 base = prom_next_cell(rac, &p); 1215 size = prom_next_cell(rsc, &p); 1216 1217 if (size == 0) 1218 continue; 1219 prom_debug(" %x %x\n", base, size); 1220 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) 1221 RELOC(rmo_top) = size; 1222 if ((base + size) > RELOC(ram_top)) 1223 RELOC(ram_top) = base + size; 1224 } 1225 } 1226 1227 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); 1228 1229 /* 1230 * If prom_memory_limit is set we reduce the upper limits *except* for 1231 * alloc_top_high. This must be the real top of RAM so we can put 1232 * TCE's up there. 1233 */ 1234 1235 RELOC(alloc_top_high) = RELOC(ram_top); 1236 1237 if (RELOC(prom_memory_limit)) { 1238 if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { 1239 prom_printf("Ignoring mem=%x <= alloc_bottom.\n", 1240 RELOC(prom_memory_limit)); 1241 RELOC(prom_memory_limit) = 0; 1242 } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { 1243 prom_printf("Ignoring mem=%x >= ram_top.\n", 1244 RELOC(prom_memory_limit)); 1245 RELOC(prom_memory_limit) = 0; 1246 } else { 1247 RELOC(ram_top) = RELOC(prom_memory_limit); 1248 RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); 1249 } 1250 } 1251 1252 /* 1253 * Setup our top alloc point, that is top of RMO or top of 1254 * segment 0 when running non-LPAR. 1255 * Some RS64 machines have buggy firmware where claims up at 1256 * 1GB fail. Cap at 768MB as a workaround. 1257 * Since 768MB is plenty of room, and we need to cap to something 1258 * reasonable on 32-bit, cap at 768MB on all machines. 1259 */ 1260 if (!RELOC(rmo_top)) 1261 RELOC(rmo_top) = RELOC(ram_top); 1262 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); 1263 RELOC(alloc_top) = RELOC(rmo_top); 1264 RELOC(alloc_top_high) = RELOC(ram_top); 1265 1266 /* 1267 * Check if we have an initrd after the kernel but still inside 1268 * the RMO. If we do move our bottom point to after it. 1269 */ 1270 if (RELOC(prom_initrd_start) && 1271 RELOC(prom_initrd_start) < RELOC(rmo_top) && 1272 RELOC(prom_initrd_end) > RELOC(alloc_bottom)) 1273 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); 1274 1275 prom_printf("memory layout at init:\n"); 1276 prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); 1277 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 1278 prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); 1279 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 1280 prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); 1281 prom_printf(" ram_top : %x\n", RELOC(ram_top)); 1282 } 1283 1284 static void __init prom_close_stdin(void) 1285 { 1286 struct prom_t *_prom = &RELOC(prom); 1287 ihandle val; 1288 1289 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) 1290 call_prom("close", 1, 0, val); 1291 } 1292 1293 #ifdef CONFIG_PPC_POWERNV 1294 1295 static u64 __initdata prom_opal_size; 1296 static u64 __initdata prom_opal_align; 1297 static int __initdata prom_rtas_start_cpu; 1298 static u64 __initdata prom_rtas_data; 1299 static u64 __initdata prom_rtas_entry; 1300 1301 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL 1302 static u64 __initdata prom_opal_base; 1303 static u64 __initdata prom_opal_entry; 1304 #endif 1305 1306 /* XXX Don't change this structure without updating opal-takeover.S */ 1307 static struct opal_secondary_data { 1308 s64 ack; /* 0 */ 1309 u64 go; /* 8 */ 1310 struct opal_takeover_args args; /* 16 */ 1311 } opal_secondary_data; 1312 1313 extern char opal_secondary_entry; 1314 1315 static void __init prom_query_opal(void) 1316 { 1317 long rc; 1318 1319 /* We must not query for OPAL presence on a machine that 1320 * supports TNK takeover (970 blades), as this uses the same 1321 * h-call with different arguments and will crash 1322 */ 1323 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, 1324 ADDR("/tnk-memory-map")))) { 1325 prom_printf("TNK takeover detected, skipping OPAL check\n"); 1326 return; 1327 } 1328 1329 prom_printf("Querying for OPAL presence... "); 1330 rc = opal_query_takeover(&RELOC(prom_opal_size), 1331 &RELOC(prom_opal_align)); 1332 prom_debug("(rc = %ld) ", rc); 1333 if (rc != 0) { 1334 prom_printf("not there.\n"); 1335 return; 1336 } 1337 RELOC(of_platform) = PLATFORM_OPAL; 1338 prom_printf(" there !\n"); 1339 prom_debug(" opal_size = 0x%lx\n", RELOC(prom_opal_size)); 1340 prom_debug(" opal_align = 0x%lx\n", RELOC(prom_opal_align)); 1341 if (RELOC(prom_opal_align) < 0x10000) 1342 RELOC(prom_opal_align) = 0x10000; 1343 } 1344 1345 static int prom_rtas_call(int token, int nargs, int nret, int *outputs, ...) 1346 { 1347 struct rtas_args rtas_args; 1348 va_list list; 1349 int i; 1350 1351 rtas_args.token = token; 1352 rtas_args.nargs = nargs; 1353 rtas_args.nret = nret; 1354 rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]); 1355 va_start(list, outputs); 1356 for (i = 0; i < nargs; ++i) 1357 rtas_args.args[i] = va_arg(list, rtas_arg_t); 1358 va_end(list); 1359 1360 for (i = 0; i < nret; ++i) 1361 rtas_args.rets[i] = 0; 1362 1363 opal_enter_rtas(&rtas_args, RELOC(prom_rtas_data), 1364 RELOC(prom_rtas_entry)); 1365 1366 if (nret > 1 && outputs != NULL) 1367 for (i = 0; i < nret-1; ++i) 1368 outputs[i] = rtas_args.rets[i+1]; 1369 return (nret > 0)? rtas_args.rets[0]: 0; 1370 } 1371 1372 static void __init prom_opal_hold_cpus(void) 1373 { 1374 int i, cnt, cpu, rc; 1375 long j; 1376 phandle node; 1377 char type[64]; 1378 u32 servers[8]; 1379 struct prom_t *_prom = &RELOC(prom); 1380 void *entry = (unsigned long *)&RELOC(opal_secondary_entry); 1381 struct opal_secondary_data *data = &RELOC(opal_secondary_data); 1382 1383 prom_debug("prom_opal_hold_cpus: start...\n"); 1384 prom_debug(" - entry = 0x%x\n", entry); 1385 prom_debug(" - data = 0x%x\n", data); 1386 1387 data->ack = -1; 1388 data->go = 0; 1389 1390 /* look for cpus */ 1391 for (node = 0; prom_next_node(&node); ) { 1392 type[0] = 0; 1393 prom_getprop(node, "device_type", type, sizeof(type)); 1394 if (strcmp(type, RELOC("cpu")) != 0) 1395 continue; 1396 1397 /* Skip non-configured cpus. */ 1398 if (prom_getprop(node, "status", type, sizeof(type)) > 0) 1399 if (strcmp(type, RELOC("okay")) != 0) 1400 continue; 1401 1402 cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers, 1403 sizeof(servers)); 1404 if (cnt == PROM_ERROR) 1405 break; 1406 cnt >>= 2; 1407 for (i = 0; i < cnt; i++) { 1408 cpu = servers[i]; 1409 prom_debug("CPU %d ... ", cpu); 1410 if (cpu == _prom->cpu) { 1411 prom_debug("booted !\n"); 1412 continue; 1413 } 1414 prom_debug("starting ... "); 1415 1416 /* Init the acknowledge var which will be reset by 1417 * the secondary cpu when it awakens from its OF 1418 * spinloop. 1419 */ 1420 data->ack = -1; 1421 rc = prom_rtas_call(RELOC(prom_rtas_start_cpu), 3, 1, 1422 NULL, cpu, entry, data); 1423 prom_debug("rtas rc=%d ...", rc); 1424 1425 for (j = 0; j < 100000000 && data->ack == -1; j++) { 1426 HMT_low(); 1427 mb(); 1428 } 1429 HMT_medium(); 1430 if (data->ack != -1) 1431 prom_debug("done, PIR=0x%x\n", data->ack); 1432 else 1433 prom_debug("timeout !\n"); 1434 } 1435 } 1436 prom_debug("prom_opal_hold_cpus: end...\n"); 1437 } 1438 1439 static void __init prom_opal_takeover(void) 1440 { 1441 struct opal_secondary_data *data = &RELOC(opal_secondary_data); 1442 struct opal_takeover_args *args = &data->args; 1443 u64 align = RELOC(prom_opal_align); 1444 u64 top_addr, opal_addr; 1445 1446 args->k_image = (u64)RELOC(_stext); 1447 args->k_size = _end - _stext; 1448 args->k_entry = 0; 1449 args->k_entry2 = 0x60; 1450 1451 top_addr = _ALIGN_UP(args->k_size, align); 1452 1453 if (RELOC(prom_initrd_start) != 0) { 1454 args->rd_image = RELOC(prom_initrd_start); 1455 args->rd_size = RELOC(prom_initrd_end) - args->rd_image; 1456 args->rd_loc = top_addr; 1457 top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align); 1458 } 1459 1460 /* Pickup an address for the HAL. We want to go really high 1461 * up to avoid problem with future kexecs. On the other hand 1462 * we don't want to be all over the TCEs on P5IOC2 machines 1463 * which are going to be up there too. We assume the machine 1464 * has plenty of memory, and we ask for the HAL for now to 1465 * be just below the 1G point, or above the initrd 1466 */ 1467 opal_addr = _ALIGN_DOWN(0x40000000 - RELOC(prom_opal_size), align); 1468 if (opal_addr < top_addr) 1469 opal_addr = top_addr; 1470 args->hal_addr = opal_addr; 1471 1472 /* Copy the command line to the kernel image */ 1473 strlcpy(RELOC(boot_command_line), RELOC(prom_cmd_line), 1474 COMMAND_LINE_SIZE); 1475 1476 prom_debug(" k_image = 0x%lx\n", args->k_image); 1477 prom_debug(" k_size = 0x%lx\n", args->k_size); 1478 prom_debug(" k_entry = 0x%lx\n", args->k_entry); 1479 prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2); 1480 prom_debug(" hal_addr = 0x%lx\n", args->hal_addr); 1481 prom_debug(" rd_image = 0x%lx\n", args->rd_image); 1482 prom_debug(" rd_size = 0x%lx\n", args->rd_size); 1483 prom_debug(" rd_loc = 0x%lx\n", args->rd_loc); 1484 prom_printf("Performing OPAL takeover,this can take a few minutes..\n"); 1485 prom_close_stdin(); 1486 mb(); 1487 data->go = 1; 1488 for (;;) 1489 opal_do_takeover(args); 1490 } 1491 1492 /* 1493 * Allocate room for and instantiate OPAL 1494 */ 1495 static void __init prom_instantiate_opal(void) 1496 { 1497 phandle opal_node; 1498 ihandle opal_inst; 1499 u64 base, entry; 1500 u64 size = 0, align = 0x10000; 1501 u32 rets[2]; 1502 1503 prom_debug("prom_instantiate_opal: start...\n"); 1504 1505 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal")); 1506 prom_debug("opal_node: %x\n", opal_node); 1507 if (!PHANDLE_VALID(opal_node)) 1508 return; 1509 1510 prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size)); 1511 if (size == 0) 1512 return; 1513 prom_getprop(opal_node, "opal-runtime-alignment", &align, 1514 sizeof(align)); 1515 1516 base = alloc_down(size, align, 0); 1517 if (base == 0) { 1518 prom_printf("OPAL allocation failed !\n"); 1519 return; 1520 } 1521 1522 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal")); 1523 if (!IHANDLE_VALID(opal_inst)) { 1524 prom_printf("opening opal package failed (%x)\n", opal_inst); 1525 return; 1526 } 1527 1528 prom_printf("instantiating opal at 0x%x...", base); 1529 1530 if (call_prom_ret("call-method", 4, 3, rets, 1531 ADDR("load-opal-runtime"), 1532 opal_inst, 1533 base >> 32, base & 0xffffffff) != 0 1534 || (rets[0] == 0 && rets[1] == 0)) { 1535 prom_printf(" failed\n"); 1536 return; 1537 } 1538 entry = (((u64)rets[0]) << 32) | rets[1]; 1539 1540 prom_printf(" done\n"); 1541 1542 reserve_mem(base, size); 1543 1544 prom_debug("opal base = 0x%x\n", base); 1545 prom_debug("opal align = 0x%x\n", align); 1546 prom_debug("opal entry = 0x%x\n", entry); 1547 prom_debug("opal size = 0x%x\n", (long)size); 1548 1549 prom_setprop(opal_node, "/ibm,opal", "opal-base-address", 1550 &base, sizeof(base)); 1551 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address", 1552 &entry, sizeof(entry)); 1553 1554 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL 1555 RELOC(prom_opal_base) = base; 1556 RELOC(prom_opal_entry) = entry; 1557 #endif 1558 prom_debug("prom_instantiate_opal: end...\n"); 1559 } 1560 1561 #endif /* CONFIG_PPC_POWERNV */ 1562 1563 /* 1564 * Allocate room for and instantiate RTAS 1565 */ 1566 static void __init prom_instantiate_rtas(void) 1567 { 1568 phandle rtas_node; 1569 ihandle rtas_inst; 1570 u32 base, entry = 0; 1571 u32 size = 0; 1572 1573 prom_debug("prom_instantiate_rtas: start...\n"); 1574 1575 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); 1576 prom_debug("rtas_node: %x\n", rtas_node); 1577 if (!PHANDLE_VALID(rtas_node)) 1578 return; 1579 1580 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); 1581 if (size == 0) 1582 return; 1583 1584 base = alloc_down(size, PAGE_SIZE, 0); 1585 if (base == 0) 1586 prom_panic("Could not allocate memory for RTAS\n"); 1587 1588 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); 1589 if (!IHANDLE_VALID(rtas_inst)) { 1590 prom_printf("opening rtas package failed (%x)\n", rtas_inst); 1591 return; 1592 } 1593 1594 prom_printf("instantiating rtas at 0x%x...", base); 1595 1596 if (call_prom_ret("call-method", 3, 2, &entry, 1597 ADDR("instantiate-rtas"), 1598 rtas_inst, base) != 0 1599 || entry == 0) { 1600 prom_printf(" failed\n"); 1601 return; 1602 } 1603 prom_printf(" done\n"); 1604 1605 reserve_mem(base, size); 1606 1607 prom_setprop(rtas_node, "/rtas", "linux,rtas-base", 1608 &base, sizeof(base)); 1609 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", 1610 &entry, sizeof(entry)); 1611 1612 #ifdef CONFIG_PPC_POWERNV 1613 /* PowerVN takeover hack */ 1614 RELOC(prom_rtas_data) = base; 1615 RELOC(prom_rtas_entry) = entry; 1616 prom_getprop(rtas_node, "start-cpu", &RELOC(prom_rtas_start_cpu), 4); 1617 #endif 1618 prom_debug("rtas base = 0x%x\n", base); 1619 prom_debug("rtas entry = 0x%x\n", entry); 1620 prom_debug("rtas size = 0x%x\n", (long)size); 1621 1622 prom_debug("prom_instantiate_rtas: end...\n"); 1623 } 1624 1625 #ifdef CONFIG_PPC64 1626 /* 1627 * Allocate room for and instantiate Stored Measurement Log (SML) 1628 */ 1629 static void __init prom_instantiate_sml(void) 1630 { 1631 phandle ibmvtpm_node; 1632 ihandle ibmvtpm_inst; 1633 u32 entry = 0, size = 0; 1634 u64 base; 1635 1636 prom_debug("prom_instantiate_sml: start...\n"); 1637 1638 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm")); 1639 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node); 1640 if (!PHANDLE_VALID(ibmvtpm_node)) 1641 return; 1642 1643 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm")); 1644 if (!IHANDLE_VALID(ibmvtpm_inst)) { 1645 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst); 1646 return; 1647 } 1648 1649 if (call_prom_ret("call-method", 2, 2, &size, 1650 ADDR("sml-get-handover-size"), 1651 ibmvtpm_inst) != 0 || size == 0) { 1652 prom_printf("SML get handover size failed\n"); 1653 return; 1654 } 1655 1656 base = alloc_down(size, PAGE_SIZE, 0); 1657 if (base == 0) 1658 prom_panic("Could not allocate memory for sml\n"); 1659 1660 prom_printf("instantiating sml at 0x%x...", base); 1661 1662 if (call_prom_ret("call-method", 4, 2, &entry, 1663 ADDR("sml-handover"), 1664 ibmvtpm_inst, size, base) != 0 || entry == 0) { 1665 prom_printf("SML handover failed\n"); 1666 return; 1667 } 1668 prom_printf(" done\n"); 1669 1670 reserve_mem(base, size); 1671 1672 prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base", 1673 &base, sizeof(base)); 1674 prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size", 1675 &size, sizeof(size)); 1676 1677 prom_debug("sml base = 0x%x\n", base); 1678 prom_debug("sml size = 0x%x\n", (long)size); 1679 1680 prom_debug("prom_instantiate_sml: end...\n"); 1681 } 1682 1683 /* 1684 * Allocate room for and initialize TCE tables 1685 */ 1686 static void __init prom_initialize_tce_table(void) 1687 { 1688 phandle node; 1689 ihandle phb_node; 1690 char compatible[64], type[64], model[64]; 1691 char *path = RELOC(prom_scratch); 1692 u64 base, align; 1693 u32 minalign, minsize; 1694 u64 tce_entry, *tce_entryp; 1695 u64 local_alloc_top, local_alloc_bottom; 1696 u64 i; 1697 1698 if (RELOC(prom_iommu_off)) 1699 return; 1700 1701 prom_debug("starting prom_initialize_tce_table\n"); 1702 1703 /* Cache current top of allocs so we reserve a single block */ 1704 local_alloc_top = RELOC(alloc_top_high); 1705 local_alloc_bottom = local_alloc_top; 1706 1707 /* Search all nodes looking for PHBs. */ 1708 for (node = 0; prom_next_node(&node); ) { 1709 compatible[0] = 0; 1710 type[0] = 0; 1711 model[0] = 0; 1712 prom_getprop(node, "compatible", 1713 compatible, sizeof(compatible)); 1714 prom_getprop(node, "device_type", type, sizeof(type)); 1715 prom_getprop(node, "model", model, sizeof(model)); 1716 1717 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) 1718 continue; 1719 1720 /* Keep the old logic intact to avoid regression. */ 1721 if (compatible[0] != 0) { 1722 if ((strstr(compatible, RELOC("python")) == NULL) && 1723 (strstr(compatible, RELOC("Speedwagon")) == NULL) && 1724 (strstr(compatible, RELOC("Winnipeg")) == NULL)) 1725 continue; 1726 } else if (model[0] != 0) { 1727 if ((strstr(model, RELOC("ython")) == NULL) && 1728 (strstr(model, RELOC("peedwagon")) == NULL) && 1729 (strstr(model, RELOC("innipeg")) == NULL)) 1730 continue; 1731 } 1732 1733 if (prom_getprop(node, "tce-table-minalign", &minalign, 1734 sizeof(minalign)) == PROM_ERROR) 1735 minalign = 0; 1736 if (prom_getprop(node, "tce-table-minsize", &minsize, 1737 sizeof(minsize)) == PROM_ERROR) 1738 minsize = 4UL << 20; 1739 1740 /* 1741 * Even though we read what OF wants, we just set the table 1742 * size to 4 MB. This is enough to map 2GB of PCI DMA space. 1743 * By doing this, we avoid the pitfalls of trying to DMA to 1744 * MMIO space and the DMA alias hole. 1745 * 1746 * On POWER4, firmware sets the TCE region by assuming 1747 * each TCE table is 8MB. Using this memory for anything 1748 * else will impact performance, so we always allocate 8MB. 1749 * Anton 1750 */ 1751 if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p)) 1752 minsize = 8UL << 20; 1753 else 1754 minsize = 4UL << 20; 1755 1756 /* Align to the greater of the align or size */ 1757 align = max(minalign, minsize); 1758 base = alloc_down(minsize, align, 1); 1759 if (base == 0) 1760 prom_panic("ERROR, cannot find space for TCE table.\n"); 1761 if (base < local_alloc_bottom) 1762 local_alloc_bottom = base; 1763 1764 /* It seems OF doesn't null-terminate the path :-( */ 1765 memset(path, 0, PROM_SCRATCH_SIZE); 1766 /* Call OF to setup the TCE hardware */ 1767 if (call_prom("package-to-path", 3, 1, node, 1768 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { 1769 prom_printf("package-to-path failed\n"); 1770 } 1771 1772 /* Save away the TCE table attributes for later use. */ 1773 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); 1774 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); 1775 1776 prom_debug("TCE table: %s\n", path); 1777 prom_debug("\tnode = 0x%x\n", node); 1778 prom_debug("\tbase = 0x%x\n", base); 1779 prom_debug("\tsize = 0x%x\n", minsize); 1780 1781 /* Initialize the table to have a one-to-one mapping 1782 * over the allocated size. 1783 */ 1784 tce_entryp = (u64 *)base; 1785 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { 1786 tce_entry = (i << PAGE_SHIFT); 1787 tce_entry |= 0x3; 1788 *tce_entryp = tce_entry; 1789 } 1790 1791 prom_printf("opening PHB %s", path); 1792 phb_node = call_prom("open", 1, 1, path); 1793 if (phb_node == 0) 1794 prom_printf("... failed\n"); 1795 else 1796 prom_printf("... done\n"); 1797 1798 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), 1799 phb_node, -1, minsize, 1800 (u32) base, (u32) (base >> 32)); 1801 call_prom("close", 1, 0, phb_node); 1802 } 1803 1804 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); 1805 1806 /* These are only really needed if there is a memory limit in 1807 * effect, but we don't know so export them always. */ 1808 RELOC(prom_tce_alloc_start) = local_alloc_bottom; 1809 RELOC(prom_tce_alloc_end) = local_alloc_top; 1810 1811 /* Flag the first invalid entry */ 1812 prom_debug("ending prom_initialize_tce_table\n"); 1813 } 1814 #endif 1815 1816 /* 1817 * With CHRP SMP we need to use the OF to start the other processors. 1818 * We can't wait until smp_boot_cpus (the OF is trashed by then) 1819 * so we have to put the processors into a holding pattern controlled 1820 * by the kernel (not OF) before we destroy the OF. 1821 * 1822 * This uses a chunk of low memory, puts some holding pattern 1823 * code there and sends the other processors off to there until 1824 * smp_boot_cpus tells them to do something. The holding pattern 1825 * checks that address until its cpu # is there, when it is that 1826 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care 1827 * of setting those values. 1828 * 1829 * We also use physical address 0x4 here to tell when a cpu 1830 * is in its holding pattern code. 1831 * 1832 * -- Cort 1833 */ 1834 /* 1835 * We want to reference the copy of __secondary_hold_* in the 1836 * 0 - 0x100 address range 1837 */ 1838 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) 1839 1840 static void __init prom_hold_cpus(void) 1841 { 1842 unsigned long i; 1843 unsigned int reg; 1844 phandle node; 1845 char type[64]; 1846 struct prom_t *_prom = &RELOC(prom); 1847 unsigned long *spinloop 1848 = (void *) LOW_ADDR(__secondary_hold_spinloop); 1849 unsigned long *acknowledge 1850 = (void *) LOW_ADDR(__secondary_hold_acknowledge); 1851 unsigned long secondary_hold = LOW_ADDR(__secondary_hold); 1852 1853 prom_debug("prom_hold_cpus: start...\n"); 1854 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); 1855 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); 1856 prom_debug(" 1) acknowledge = 0x%x\n", 1857 (unsigned long)acknowledge); 1858 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); 1859 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); 1860 1861 /* Set the common spinloop variable, so all of the secondary cpus 1862 * will block when they are awakened from their OF spinloop. 1863 * This must occur for both SMP and non SMP kernels, since OF will 1864 * be trashed when we move the kernel. 1865 */ 1866 *spinloop = 0; 1867 1868 /* look for cpus */ 1869 for (node = 0; prom_next_node(&node); ) { 1870 type[0] = 0; 1871 prom_getprop(node, "device_type", type, sizeof(type)); 1872 if (strcmp(type, RELOC("cpu")) != 0) 1873 continue; 1874 1875 /* Skip non-configured cpus. */ 1876 if (prom_getprop(node, "status", type, sizeof(type)) > 0) 1877 if (strcmp(type, RELOC("okay")) != 0) 1878 continue; 1879 1880 reg = -1; 1881 prom_getprop(node, "reg", ®, sizeof(reg)); 1882 1883 prom_debug("cpu hw idx = %lu\n", reg); 1884 1885 /* Init the acknowledge var which will be reset by 1886 * the secondary cpu when it awakens from its OF 1887 * spinloop. 1888 */ 1889 *acknowledge = (unsigned long)-1; 1890 1891 if (reg != _prom->cpu) { 1892 /* Primary Thread of non-boot cpu or any thread */ 1893 prom_printf("starting cpu hw idx %lu... ", reg); 1894 call_prom("start-cpu", 3, 0, node, 1895 secondary_hold, reg); 1896 1897 for (i = 0; (i < 100000000) && 1898 (*acknowledge == ((unsigned long)-1)); i++ ) 1899 mb(); 1900 1901 if (*acknowledge == reg) 1902 prom_printf("done\n"); 1903 else 1904 prom_printf("failed: %x\n", *acknowledge); 1905 } 1906 #ifdef CONFIG_SMP 1907 else 1908 prom_printf("boot cpu hw idx %lu\n", reg); 1909 #endif /* CONFIG_SMP */ 1910 } 1911 1912 prom_debug("prom_hold_cpus: end...\n"); 1913 } 1914 1915 1916 static void __init prom_init_client_services(unsigned long pp) 1917 { 1918 struct prom_t *_prom = &RELOC(prom); 1919 1920 /* Get a handle to the prom entry point before anything else */ 1921 RELOC(prom_entry) = pp; 1922 1923 /* get a handle for the stdout device */ 1924 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); 1925 if (!PHANDLE_VALID(_prom->chosen)) 1926 prom_panic("cannot find chosen"); /* msg won't be printed :( */ 1927 1928 /* get device tree root */ 1929 _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); 1930 if (!PHANDLE_VALID(_prom->root)) 1931 prom_panic("cannot find device tree root"); /* msg won't be printed :( */ 1932 1933 _prom->mmumap = 0; 1934 } 1935 1936 #ifdef CONFIG_PPC32 1937 /* 1938 * For really old powermacs, we need to map things we claim. 1939 * For that, we need the ihandle of the mmu. 1940 * Also, on the longtrail, we need to work around other bugs. 1941 */ 1942 static void __init prom_find_mmu(void) 1943 { 1944 struct prom_t *_prom = &RELOC(prom); 1945 phandle oprom; 1946 char version[64]; 1947 1948 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); 1949 if (!PHANDLE_VALID(oprom)) 1950 return; 1951 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) 1952 return; 1953 version[sizeof(version) - 1] = 0; 1954 /* XXX might need to add other versions here */ 1955 if (strcmp(version, "Open Firmware, 1.0.5") == 0) 1956 of_workarounds = OF_WA_CLAIM; 1957 else if (strncmp(version, "FirmWorks,3.", 12) == 0) { 1958 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; 1959 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); 1960 } else 1961 return; 1962 _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); 1963 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, 1964 sizeof(_prom->mmumap)); 1965 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) 1966 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ 1967 } 1968 #else 1969 #define prom_find_mmu() 1970 #endif 1971 1972 static void __init prom_init_stdout(void) 1973 { 1974 struct prom_t *_prom = &RELOC(prom); 1975 char *path = RELOC(of_stdout_device); 1976 char type[16]; 1977 u32 val; 1978 1979 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) 1980 prom_panic("cannot find stdout"); 1981 1982 _prom->stdout = val; 1983 1984 /* Get the full OF pathname of the stdout device */ 1985 memset(path, 0, 256); 1986 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); 1987 val = call_prom("instance-to-package", 1, 1, _prom->stdout); 1988 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", 1989 &val, sizeof(val)); 1990 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); 1991 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", 1992 path, strlen(path) + 1); 1993 1994 /* If it's a display, note it */ 1995 memset(type, 0, sizeof(type)); 1996 prom_getprop(val, "device_type", type, sizeof(type)); 1997 if (strcmp(type, RELOC("display")) == 0) 1998 prom_setprop(val, path, "linux,boot-display", NULL, 0); 1999 } 2000 2001 static int __init prom_find_machine_type(void) 2002 { 2003 struct prom_t *_prom = &RELOC(prom); 2004 char compat[256]; 2005 int len, i = 0; 2006 #ifdef CONFIG_PPC64 2007 phandle rtas; 2008 int x; 2009 #endif 2010 2011 /* Look for a PowerMac or a Cell */ 2012 len = prom_getprop(_prom->root, "compatible", 2013 compat, sizeof(compat)-1); 2014 if (len > 0) { 2015 compat[len] = 0; 2016 while (i < len) { 2017 char *p = &compat[i]; 2018 int sl = strlen(p); 2019 if (sl == 0) 2020 break; 2021 if (strstr(p, RELOC("Power Macintosh")) || 2022 strstr(p, RELOC("MacRISC"))) 2023 return PLATFORM_POWERMAC; 2024 #ifdef CONFIG_PPC64 2025 /* We must make sure we don't detect the IBM Cell 2026 * blades as pSeries due to some firmware issues, 2027 * so we do it here. 2028 */ 2029 if (strstr(p, RELOC("IBM,CBEA")) || 2030 strstr(p, RELOC("IBM,CPBW-1.0"))) 2031 return PLATFORM_GENERIC; 2032 #endif /* CONFIG_PPC64 */ 2033 i += sl + 1; 2034 } 2035 } 2036 #ifdef CONFIG_PPC64 2037 /* Try to detect OPAL */ 2038 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal")))) 2039 return PLATFORM_OPAL; 2040 2041 /* Try to figure out if it's an IBM pSeries or any other 2042 * PAPR compliant platform. We assume it is if : 2043 * - /device_type is "chrp" (please, do NOT use that for future 2044 * non-IBM designs ! 2045 * - it has /rtas 2046 */ 2047 len = prom_getprop(_prom->root, "device_type", 2048 compat, sizeof(compat)-1); 2049 if (len <= 0) 2050 return PLATFORM_GENERIC; 2051 if (strcmp(compat, RELOC("chrp"))) 2052 return PLATFORM_GENERIC; 2053 2054 /* Default to pSeries. We need to know if we are running LPAR */ 2055 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); 2056 if (!PHANDLE_VALID(rtas)) 2057 return PLATFORM_GENERIC; 2058 x = prom_getproplen(rtas, "ibm,hypertas-functions"); 2059 if (x != PROM_ERROR) { 2060 prom_debug("Hypertas detected, assuming LPAR !\n"); 2061 return PLATFORM_PSERIES_LPAR; 2062 } 2063 return PLATFORM_PSERIES; 2064 #else 2065 return PLATFORM_GENERIC; 2066 #endif 2067 } 2068 2069 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) 2070 { 2071 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); 2072 } 2073 2074 /* 2075 * If we have a display that we don't know how to drive, 2076 * we will want to try to execute OF's open method for it 2077 * later. However, OF will probably fall over if we do that 2078 * we've taken over the MMU. 2079 * So we check whether we will need to open the display, 2080 * and if so, open it now. 2081 */ 2082 static void __init prom_check_displays(void) 2083 { 2084 char type[16], *path; 2085 phandle node; 2086 ihandle ih; 2087 int i; 2088 2089 static unsigned char default_colors[] = { 2090 0x00, 0x00, 0x00, 2091 0x00, 0x00, 0xaa, 2092 0x00, 0xaa, 0x00, 2093 0x00, 0xaa, 0xaa, 2094 0xaa, 0x00, 0x00, 2095 0xaa, 0x00, 0xaa, 2096 0xaa, 0xaa, 0x00, 2097 0xaa, 0xaa, 0xaa, 2098 0x55, 0x55, 0x55, 2099 0x55, 0x55, 0xff, 2100 0x55, 0xff, 0x55, 2101 0x55, 0xff, 0xff, 2102 0xff, 0x55, 0x55, 2103 0xff, 0x55, 0xff, 2104 0xff, 0xff, 0x55, 2105 0xff, 0xff, 0xff 2106 }; 2107 const unsigned char *clut; 2108 2109 prom_debug("Looking for displays\n"); 2110 for (node = 0; prom_next_node(&node); ) { 2111 memset(type, 0, sizeof(type)); 2112 prom_getprop(node, "device_type", type, sizeof(type)); 2113 if (strcmp(type, RELOC("display")) != 0) 2114 continue; 2115 2116 /* It seems OF doesn't null-terminate the path :-( */ 2117 path = RELOC(prom_scratch); 2118 memset(path, 0, PROM_SCRATCH_SIZE); 2119 2120 /* 2121 * leave some room at the end of the path for appending extra 2122 * arguments 2123 */ 2124 if (call_prom("package-to-path", 3, 1, node, path, 2125 PROM_SCRATCH_SIZE-10) == PROM_ERROR) 2126 continue; 2127 prom_printf("found display : %s, opening... ", path); 2128 2129 ih = call_prom("open", 1, 1, path); 2130 if (ih == 0) { 2131 prom_printf("failed\n"); 2132 continue; 2133 } 2134 2135 /* Success */ 2136 prom_printf("done\n"); 2137 prom_setprop(node, path, "linux,opened", NULL, 0); 2138 2139 /* Setup a usable color table when the appropriate 2140 * method is available. Should update this to set-colors */ 2141 clut = RELOC(default_colors); 2142 for (i = 0; i < 16; i++, clut += 3) 2143 if (prom_set_color(ih, i, clut[0], clut[1], 2144 clut[2]) != 0) 2145 break; 2146 2147 #ifdef CONFIG_LOGO_LINUX_CLUT224 2148 clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); 2149 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) 2150 if (prom_set_color(ih, i + 32, clut[0], clut[1], 2151 clut[2]) != 0) 2152 break; 2153 #endif /* CONFIG_LOGO_LINUX_CLUT224 */ 2154 } 2155 } 2156 2157 2158 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ 2159 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, 2160 unsigned long needed, unsigned long align) 2161 { 2162 void *ret; 2163 2164 *mem_start = _ALIGN(*mem_start, align); 2165 while ((*mem_start + needed) > *mem_end) { 2166 unsigned long room, chunk; 2167 2168 prom_debug("Chunk exhausted, claiming more at %x...\n", 2169 RELOC(alloc_bottom)); 2170 room = RELOC(alloc_top) - RELOC(alloc_bottom); 2171 if (room > DEVTREE_CHUNK_SIZE) 2172 room = DEVTREE_CHUNK_SIZE; 2173 if (room < PAGE_SIZE) 2174 prom_panic("No memory for flatten_device_tree " 2175 "(no room)\n"); 2176 chunk = alloc_up(room, 0); 2177 if (chunk == 0) 2178 prom_panic("No memory for flatten_device_tree " 2179 "(claim failed)\n"); 2180 *mem_end = chunk + room; 2181 } 2182 2183 ret = (void *)*mem_start; 2184 *mem_start += needed; 2185 2186 return ret; 2187 } 2188 2189 #define dt_push_token(token, mem_start, mem_end) \ 2190 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) 2191 2192 static unsigned long __init dt_find_string(char *str) 2193 { 2194 char *s, *os; 2195 2196 s = os = (char *)RELOC(dt_string_start); 2197 s += 4; 2198 while (s < (char *)RELOC(dt_string_end)) { 2199 if (strcmp(s, str) == 0) 2200 return s - os; 2201 s += strlen(s) + 1; 2202 } 2203 return 0; 2204 } 2205 2206 /* 2207 * The Open Firmware 1275 specification states properties must be 31 bytes or 2208 * less, however not all firmwares obey this. Make it 64 bytes to be safe. 2209 */ 2210 #define MAX_PROPERTY_NAME 64 2211 2212 static void __init scan_dt_build_strings(phandle node, 2213 unsigned long *mem_start, 2214 unsigned long *mem_end) 2215 { 2216 char *prev_name, *namep, *sstart; 2217 unsigned long soff; 2218 phandle child; 2219 2220 sstart = (char *)RELOC(dt_string_start); 2221 2222 /* get and store all property names */ 2223 prev_name = RELOC(""); 2224 for (;;) { 2225 /* 64 is max len of name including nul. */ 2226 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); 2227 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { 2228 /* No more nodes: unwind alloc */ 2229 *mem_start = (unsigned long)namep; 2230 break; 2231 } 2232 2233 /* skip "name" */ 2234 if (strcmp(namep, RELOC("name")) == 0) { 2235 *mem_start = (unsigned long)namep; 2236 prev_name = RELOC("name"); 2237 continue; 2238 } 2239 /* get/create string entry */ 2240 soff = dt_find_string(namep); 2241 if (soff != 0) { 2242 *mem_start = (unsigned long)namep; 2243 namep = sstart + soff; 2244 } else { 2245 /* Trim off some if we can */ 2246 *mem_start = (unsigned long)namep + strlen(namep) + 1; 2247 RELOC(dt_string_end) = *mem_start; 2248 } 2249 prev_name = namep; 2250 } 2251 2252 /* do all our children */ 2253 child = call_prom("child", 1, 1, node); 2254 while (child != 0) { 2255 scan_dt_build_strings(child, mem_start, mem_end); 2256 child = call_prom("peer", 1, 1, child); 2257 } 2258 } 2259 2260 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, 2261 unsigned long *mem_end) 2262 { 2263 phandle child; 2264 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; 2265 unsigned long soff; 2266 unsigned char *valp; 2267 static char pname[MAX_PROPERTY_NAME]; 2268 int l, room, has_phandle = 0; 2269 2270 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); 2271 2272 /* get the node's full name */ 2273 namep = (char *)*mem_start; 2274 room = *mem_end - *mem_start; 2275 if (room > 255) 2276 room = 255; 2277 l = call_prom("package-to-path", 3, 1, node, namep, room); 2278 if (l >= 0) { 2279 /* Didn't fit? Get more room. */ 2280 if (l >= room) { 2281 if (l >= *mem_end - *mem_start) 2282 namep = make_room(mem_start, mem_end, l+1, 1); 2283 call_prom("package-to-path", 3, 1, node, namep, l); 2284 } 2285 namep[l] = '\0'; 2286 2287 /* Fixup an Apple bug where they have bogus \0 chars in the 2288 * middle of the path in some properties, and extract 2289 * the unit name (everything after the last '/'). 2290 */ 2291 for (lp = p = namep, ep = namep + l; p < ep; p++) { 2292 if (*p == '/') 2293 lp = namep; 2294 else if (*p != 0) 2295 *lp++ = *p; 2296 } 2297 *lp = 0; 2298 *mem_start = _ALIGN((unsigned long)lp + 1, 4); 2299 } 2300 2301 /* get it again for debugging */ 2302 path = RELOC(prom_scratch); 2303 memset(path, 0, PROM_SCRATCH_SIZE); 2304 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 2305 2306 /* get and store all properties */ 2307 prev_name = RELOC(""); 2308 sstart = (char *)RELOC(dt_string_start); 2309 for (;;) { 2310 if (call_prom("nextprop", 3, 1, node, prev_name, 2311 RELOC(pname)) != 1) 2312 break; 2313 2314 /* skip "name" */ 2315 if (strcmp(RELOC(pname), RELOC("name")) == 0) { 2316 prev_name = RELOC("name"); 2317 continue; 2318 } 2319 2320 /* find string offset */ 2321 soff = dt_find_string(RELOC(pname)); 2322 if (soff == 0) { 2323 prom_printf("WARNING: Can't find string index for" 2324 " <%s>, node %s\n", RELOC(pname), path); 2325 break; 2326 } 2327 prev_name = sstart + soff; 2328 2329 /* get length */ 2330 l = call_prom("getproplen", 2, 1, node, RELOC(pname)); 2331 2332 /* sanity checks */ 2333 if (l == PROM_ERROR) 2334 continue; 2335 2336 /* push property head */ 2337 dt_push_token(OF_DT_PROP, mem_start, mem_end); 2338 dt_push_token(l, mem_start, mem_end); 2339 dt_push_token(soff, mem_start, mem_end); 2340 2341 /* push property content */ 2342 valp = make_room(mem_start, mem_end, l, 4); 2343 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); 2344 *mem_start = _ALIGN(*mem_start, 4); 2345 2346 if (!strcmp(RELOC(pname), RELOC("phandle"))) 2347 has_phandle = 1; 2348 } 2349 2350 /* Add a "linux,phandle" property if no "phandle" property already 2351 * existed (can happen with OPAL) 2352 */ 2353 if (!has_phandle) { 2354 soff = dt_find_string(RELOC("linux,phandle")); 2355 if (soff == 0) 2356 prom_printf("WARNING: Can't find string index for" 2357 " <linux-phandle> node %s\n", path); 2358 else { 2359 dt_push_token(OF_DT_PROP, mem_start, mem_end); 2360 dt_push_token(4, mem_start, mem_end); 2361 dt_push_token(soff, mem_start, mem_end); 2362 valp = make_room(mem_start, mem_end, 4, 4); 2363 *(u32 *)valp = node; 2364 } 2365 } 2366 2367 /* do all our children */ 2368 child = call_prom("child", 1, 1, node); 2369 while (child != 0) { 2370 scan_dt_build_struct(child, mem_start, mem_end); 2371 child = call_prom("peer", 1, 1, child); 2372 } 2373 2374 dt_push_token(OF_DT_END_NODE, mem_start, mem_end); 2375 } 2376 2377 static void __init flatten_device_tree(void) 2378 { 2379 phandle root; 2380 unsigned long mem_start, mem_end, room; 2381 struct boot_param_header *hdr; 2382 struct prom_t *_prom = &RELOC(prom); 2383 char *namep; 2384 u64 *rsvmap; 2385 2386 /* 2387 * Check how much room we have between alloc top & bottom (+/- a 2388 * few pages), crop to 1MB, as this is our "chunk" size 2389 */ 2390 room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; 2391 if (room > DEVTREE_CHUNK_SIZE) 2392 room = DEVTREE_CHUNK_SIZE; 2393 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); 2394 2395 /* Now try to claim that */ 2396 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); 2397 if (mem_start == 0) 2398 prom_panic("Can't allocate initial device-tree chunk\n"); 2399 mem_end = mem_start + room; 2400 2401 /* Get root of tree */ 2402 root = call_prom("peer", 1, 1, (phandle)0); 2403 if (root == (phandle)0) 2404 prom_panic ("couldn't get device tree root\n"); 2405 2406 /* Build header and make room for mem rsv map */ 2407 mem_start = _ALIGN(mem_start, 4); 2408 hdr = make_room(&mem_start, &mem_end, 2409 sizeof(struct boot_param_header), 4); 2410 RELOC(dt_header_start) = (unsigned long)hdr; 2411 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); 2412 2413 /* Start of strings */ 2414 mem_start = PAGE_ALIGN(mem_start); 2415 RELOC(dt_string_start) = mem_start; 2416 mem_start += 4; /* hole */ 2417 2418 /* Add "linux,phandle" in there, we'll need it */ 2419 namep = make_room(&mem_start, &mem_end, 16, 1); 2420 strcpy(namep, RELOC("linux,phandle")); 2421 mem_start = (unsigned long)namep + strlen(namep) + 1; 2422 2423 /* Build string array */ 2424 prom_printf("Building dt strings...\n"); 2425 scan_dt_build_strings(root, &mem_start, &mem_end); 2426 RELOC(dt_string_end) = mem_start; 2427 2428 /* Build structure */ 2429 mem_start = PAGE_ALIGN(mem_start); 2430 RELOC(dt_struct_start) = mem_start; 2431 prom_printf("Building dt structure...\n"); 2432 scan_dt_build_struct(root, &mem_start, &mem_end); 2433 dt_push_token(OF_DT_END, &mem_start, &mem_end); 2434 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); 2435 2436 /* Finish header */ 2437 hdr->boot_cpuid_phys = _prom->cpu; 2438 hdr->magic = OF_DT_HEADER; 2439 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); 2440 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); 2441 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); 2442 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); 2443 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); 2444 hdr->version = OF_DT_VERSION; 2445 /* Version 16 is not backward compatible */ 2446 hdr->last_comp_version = 0x10; 2447 2448 /* Copy the reserve map in */ 2449 memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); 2450 2451 #ifdef DEBUG_PROM 2452 { 2453 int i; 2454 prom_printf("reserved memory map:\n"); 2455 for (i = 0; i < RELOC(mem_reserve_cnt); i++) 2456 prom_printf(" %x - %x\n", 2457 RELOC(mem_reserve_map)[i].base, 2458 RELOC(mem_reserve_map)[i].size); 2459 } 2460 #endif 2461 /* Bump mem_reserve_cnt to cause further reservations to fail 2462 * since it's too late. 2463 */ 2464 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; 2465 2466 prom_printf("Device tree strings 0x%x -> 0x%x\n", 2467 RELOC(dt_string_start), RELOC(dt_string_end)); 2468 prom_printf("Device tree struct 0x%x -> 0x%x\n", 2469 RELOC(dt_struct_start), RELOC(dt_struct_end)); 2470 2471 } 2472 2473 #ifdef CONFIG_PPC_MAPLE 2474 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. 2475 * The values are bad, and it doesn't even have the right number of cells. */ 2476 static void __init fixup_device_tree_maple(void) 2477 { 2478 phandle isa; 2479 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ 2480 u32 isa_ranges[6]; 2481 char *name; 2482 2483 name = "/ht@0/isa@4"; 2484 isa = call_prom("finddevice", 1, 1, ADDR(name)); 2485 if (!PHANDLE_VALID(isa)) { 2486 name = "/ht@0/isa@6"; 2487 isa = call_prom("finddevice", 1, 1, ADDR(name)); 2488 rloc = 0x01003000; /* IO space; PCI device = 6 */ 2489 } 2490 if (!PHANDLE_VALID(isa)) 2491 return; 2492 2493 if (prom_getproplen(isa, "ranges") != 12) 2494 return; 2495 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) 2496 == PROM_ERROR) 2497 return; 2498 2499 if (isa_ranges[0] != 0x1 || 2500 isa_ranges[1] != 0xf4000000 || 2501 isa_ranges[2] != 0x00010000) 2502 return; 2503 2504 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); 2505 2506 isa_ranges[0] = 0x1; 2507 isa_ranges[1] = 0x0; 2508 isa_ranges[2] = rloc; 2509 isa_ranges[3] = 0x0; 2510 isa_ranges[4] = 0x0; 2511 isa_ranges[5] = 0x00010000; 2512 prom_setprop(isa, name, "ranges", 2513 isa_ranges, sizeof(isa_ranges)); 2514 } 2515 2516 #define CPC925_MC_START 0xf8000000 2517 #define CPC925_MC_LENGTH 0x1000000 2518 /* The values for memory-controller don't have right number of cells */ 2519 static void __init fixup_device_tree_maple_memory_controller(void) 2520 { 2521 phandle mc; 2522 u32 mc_reg[4]; 2523 char *name = "/hostbridge@f8000000"; 2524 struct prom_t *_prom = &RELOC(prom); 2525 u32 ac, sc; 2526 2527 mc = call_prom("finddevice", 1, 1, ADDR(name)); 2528 if (!PHANDLE_VALID(mc)) 2529 return; 2530 2531 if (prom_getproplen(mc, "reg") != 8) 2532 return; 2533 2534 prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac)); 2535 prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc)); 2536 if ((ac != 2) || (sc != 2)) 2537 return; 2538 2539 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) 2540 return; 2541 2542 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) 2543 return; 2544 2545 prom_printf("Fixing up bogus hostbridge on Maple...\n"); 2546 2547 mc_reg[0] = 0x0; 2548 mc_reg[1] = CPC925_MC_START; 2549 mc_reg[2] = 0x0; 2550 mc_reg[3] = CPC925_MC_LENGTH; 2551 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); 2552 } 2553 #else 2554 #define fixup_device_tree_maple() 2555 #define fixup_device_tree_maple_memory_controller() 2556 #endif 2557 2558 #ifdef CONFIG_PPC_CHRP 2559 /* 2560 * Pegasos and BriQ lacks the "ranges" property in the isa node 2561 * Pegasos needs decimal IRQ 14/15, not hexadecimal 2562 * Pegasos has the IDE configured in legacy mode, but advertised as native 2563 */ 2564 static void __init fixup_device_tree_chrp(void) 2565 { 2566 phandle ph; 2567 u32 prop[6]; 2568 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ 2569 char *name; 2570 int rc; 2571 2572 name = "/pci@80000000/isa@c"; 2573 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2574 if (!PHANDLE_VALID(ph)) { 2575 name = "/pci@ff500000/isa@6"; 2576 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2577 rloc = 0x01003000; /* IO space; PCI device = 6 */ 2578 } 2579 if (PHANDLE_VALID(ph)) { 2580 rc = prom_getproplen(ph, "ranges"); 2581 if (rc == 0 || rc == PROM_ERROR) { 2582 prom_printf("Fixing up missing ISA range on Pegasos...\n"); 2583 2584 prop[0] = 0x1; 2585 prop[1] = 0x0; 2586 prop[2] = rloc; 2587 prop[3] = 0x0; 2588 prop[4] = 0x0; 2589 prop[5] = 0x00010000; 2590 prom_setprop(ph, name, "ranges", prop, sizeof(prop)); 2591 } 2592 } 2593 2594 name = "/pci@80000000/ide@C,1"; 2595 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2596 if (PHANDLE_VALID(ph)) { 2597 prom_printf("Fixing up IDE interrupt on Pegasos...\n"); 2598 prop[0] = 14; 2599 prop[1] = 0x0; 2600 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); 2601 prom_printf("Fixing up IDE class-code on Pegasos...\n"); 2602 rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); 2603 if (rc == sizeof(u32)) { 2604 prop[0] &= ~0x5; 2605 prom_setprop(ph, name, "class-code", prop, sizeof(u32)); 2606 } 2607 } 2608 } 2609 #else 2610 #define fixup_device_tree_chrp() 2611 #endif 2612 2613 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) 2614 static void __init fixup_device_tree_pmac(void) 2615 { 2616 phandle u3, i2c, mpic; 2617 u32 u3_rev; 2618 u32 interrupts[2]; 2619 u32 parent; 2620 2621 /* Some G5s have a missing interrupt definition, fix it up here */ 2622 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); 2623 if (!PHANDLE_VALID(u3)) 2624 return; 2625 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); 2626 if (!PHANDLE_VALID(i2c)) 2627 return; 2628 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); 2629 if (!PHANDLE_VALID(mpic)) 2630 return; 2631 2632 /* check if proper rev of u3 */ 2633 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) 2634 == PROM_ERROR) 2635 return; 2636 if (u3_rev < 0x35 || u3_rev > 0x39) 2637 return; 2638 /* does it need fixup ? */ 2639 if (prom_getproplen(i2c, "interrupts") > 0) 2640 return; 2641 2642 prom_printf("fixing up bogus interrupts for u3 i2c...\n"); 2643 2644 /* interrupt on this revision of u3 is number 0 and level */ 2645 interrupts[0] = 0; 2646 interrupts[1] = 1; 2647 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", 2648 &interrupts, sizeof(interrupts)); 2649 parent = (u32)mpic; 2650 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", 2651 &parent, sizeof(parent)); 2652 } 2653 #else 2654 #define fixup_device_tree_pmac() 2655 #endif 2656 2657 #ifdef CONFIG_PPC_EFIKA 2658 /* 2659 * The MPC5200 FEC driver requires an phy-handle property to tell it how 2660 * to talk to the phy. If the phy-handle property is missing, then this 2661 * function is called to add the appropriate nodes and link it to the 2662 * ethernet node. 2663 */ 2664 static void __init fixup_device_tree_efika_add_phy(void) 2665 { 2666 u32 node; 2667 char prop[64]; 2668 int rv; 2669 2670 /* Check if /builtin/ethernet exists - bail if it doesn't */ 2671 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); 2672 if (!PHANDLE_VALID(node)) 2673 return; 2674 2675 /* Check if the phy-handle property exists - bail if it does */ 2676 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); 2677 if (!rv) 2678 return; 2679 2680 /* 2681 * At this point the ethernet device doesn't have a phy described. 2682 * Now we need to add the missing phy node and linkage 2683 */ 2684 2685 /* Check for an MDIO bus node - if missing then create one */ 2686 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); 2687 if (!PHANDLE_VALID(node)) { 2688 prom_printf("Adding Ethernet MDIO node\n"); 2689 call_prom("interpret", 1, 1, 2690 " s\" /builtin\" find-device" 2691 " new-device" 2692 " 1 encode-int s\" #address-cells\" property" 2693 " 0 encode-int s\" #size-cells\" property" 2694 " s\" mdio\" device-name" 2695 " s\" fsl,mpc5200b-mdio\" encode-string" 2696 " s\" compatible\" property" 2697 " 0xf0003000 0x400 reg" 2698 " 0x2 encode-int" 2699 " 0x5 encode-int encode+" 2700 " 0x3 encode-int encode+" 2701 " s\" interrupts\" property" 2702 " finish-device"); 2703 }; 2704 2705 /* Check for a PHY device node - if missing then create one and 2706 * give it's phandle to the ethernet node */ 2707 node = call_prom("finddevice", 1, 1, 2708 ADDR("/builtin/mdio/ethernet-phy")); 2709 if (!PHANDLE_VALID(node)) { 2710 prom_printf("Adding Ethernet PHY node\n"); 2711 call_prom("interpret", 1, 1, 2712 " s\" /builtin/mdio\" find-device" 2713 " new-device" 2714 " s\" ethernet-phy\" device-name" 2715 " 0x10 encode-int s\" reg\" property" 2716 " my-self" 2717 " ihandle>phandle" 2718 " finish-device" 2719 " s\" /builtin/ethernet\" find-device" 2720 " encode-int" 2721 " s\" phy-handle\" property" 2722 " device-end"); 2723 } 2724 } 2725 2726 static void __init fixup_device_tree_efika(void) 2727 { 2728 int sound_irq[3] = { 2, 2, 0 }; 2729 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, 2730 3,4,0, 3,5,0, 3,6,0, 3,7,0, 2731 3,8,0, 3,9,0, 3,10,0, 3,11,0, 2732 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; 2733 u32 node; 2734 char prop[64]; 2735 int rv, len; 2736 2737 /* Check if we're really running on a EFIKA */ 2738 node = call_prom("finddevice", 1, 1, ADDR("/")); 2739 if (!PHANDLE_VALID(node)) 2740 return; 2741 2742 rv = prom_getprop(node, "model", prop, sizeof(prop)); 2743 if (rv == PROM_ERROR) 2744 return; 2745 if (strcmp(prop, "EFIKA5K2")) 2746 return; 2747 2748 prom_printf("Applying EFIKA device tree fixups\n"); 2749 2750 /* Claiming to be 'chrp' is death */ 2751 node = call_prom("finddevice", 1, 1, ADDR("/")); 2752 rv = prom_getprop(node, "device_type", prop, sizeof(prop)); 2753 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) 2754 prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); 2755 2756 /* CODEGEN,description is exposed in /proc/cpuinfo so 2757 fix that too */ 2758 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); 2759 if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) 2760 prom_setprop(node, "/", "CODEGEN,description", 2761 "Efika 5200B PowerPC System", 2762 sizeof("Efika 5200B PowerPC System")); 2763 2764 /* Fixup bestcomm interrupts property */ 2765 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); 2766 if (PHANDLE_VALID(node)) { 2767 len = prom_getproplen(node, "interrupts"); 2768 if (len == 12) { 2769 prom_printf("Fixing bestcomm interrupts property\n"); 2770 prom_setprop(node, "/builtin/bestcom", "interrupts", 2771 bcomm_irq, sizeof(bcomm_irq)); 2772 } 2773 } 2774 2775 /* Fixup sound interrupts property */ 2776 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); 2777 if (PHANDLE_VALID(node)) { 2778 rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); 2779 if (rv == PROM_ERROR) { 2780 prom_printf("Adding sound interrupts property\n"); 2781 prom_setprop(node, "/builtin/sound", "interrupts", 2782 sound_irq, sizeof(sound_irq)); 2783 } 2784 } 2785 2786 /* Make sure ethernet phy-handle property exists */ 2787 fixup_device_tree_efika_add_phy(); 2788 } 2789 #else 2790 #define fixup_device_tree_efika() 2791 #endif 2792 2793 static void __init fixup_device_tree(void) 2794 { 2795 fixup_device_tree_maple(); 2796 fixup_device_tree_maple_memory_controller(); 2797 fixup_device_tree_chrp(); 2798 fixup_device_tree_pmac(); 2799 fixup_device_tree_efika(); 2800 } 2801 2802 static void __init prom_find_boot_cpu(void) 2803 { 2804 struct prom_t *_prom = &RELOC(prom); 2805 u32 getprop_rval; 2806 ihandle prom_cpu; 2807 phandle cpu_pkg; 2808 2809 _prom->cpu = 0; 2810 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) 2811 return; 2812 2813 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); 2814 2815 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); 2816 _prom->cpu = getprop_rval; 2817 2818 prom_debug("Booting CPU hw index = %lu\n", _prom->cpu); 2819 } 2820 2821 static void __init prom_check_initrd(unsigned long r3, unsigned long r4) 2822 { 2823 #ifdef CONFIG_BLK_DEV_INITRD 2824 struct prom_t *_prom = &RELOC(prom); 2825 2826 if (r3 && r4 && r4 != 0xdeadbeef) { 2827 unsigned long val; 2828 2829 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; 2830 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; 2831 2832 val = RELOC(prom_initrd_start); 2833 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", 2834 &val, sizeof(val)); 2835 val = RELOC(prom_initrd_end); 2836 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", 2837 &val, sizeof(val)); 2838 2839 reserve_mem(RELOC(prom_initrd_start), 2840 RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); 2841 2842 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); 2843 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); 2844 } 2845 #endif /* CONFIG_BLK_DEV_INITRD */ 2846 } 2847 2848 2849 /* 2850 * We enter here early on, when the Open Firmware prom is still 2851 * handling exceptions and the MMU hash table for us. 2852 */ 2853 2854 unsigned long __init prom_init(unsigned long r3, unsigned long r4, 2855 unsigned long pp, 2856 unsigned long r6, unsigned long r7, 2857 unsigned long kbase) 2858 { 2859 struct prom_t *_prom; 2860 unsigned long hdr; 2861 2862 #ifdef CONFIG_PPC32 2863 unsigned long offset = reloc_offset(); 2864 reloc_got2(offset); 2865 #endif 2866 2867 _prom = &RELOC(prom); 2868 2869 /* 2870 * First zero the BSS 2871 */ 2872 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); 2873 2874 /* 2875 * Init interface to Open Firmware, get some node references, 2876 * like /chosen 2877 */ 2878 prom_init_client_services(pp); 2879 2880 /* 2881 * See if this OF is old enough that we need to do explicit maps 2882 * and other workarounds 2883 */ 2884 prom_find_mmu(); 2885 2886 /* 2887 * Init prom stdout device 2888 */ 2889 prom_init_stdout(); 2890 2891 prom_printf("Preparing to boot %s", RELOC(linux_banner)); 2892 2893 /* 2894 * Get default machine type. At this point, we do not differentiate 2895 * between pSeries SMP and pSeries LPAR 2896 */ 2897 RELOC(of_platform) = prom_find_machine_type(); 2898 prom_printf("Detected machine type: %x\n", RELOC(of_platform)); 2899 2900 #ifndef CONFIG_NONSTATIC_KERNEL 2901 /* Bail if this is a kdump kernel. */ 2902 if (PHYSICAL_START > 0) 2903 prom_panic("Error: You can't boot a kdump kernel from OF!\n"); 2904 #endif 2905 2906 /* 2907 * Check for an initrd 2908 */ 2909 prom_check_initrd(r3, r4); 2910 2911 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 2912 /* 2913 * On pSeries, inform the firmware about our capabilities 2914 */ 2915 if (RELOC(of_platform) == PLATFORM_PSERIES || 2916 RELOC(of_platform) == PLATFORM_PSERIES_LPAR) 2917 prom_send_capabilities(); 2918 #endif 2919 2920 /* 2921 * Copy the CPU hold code 2922 */ 2923 if (RELOC(of_platform) != PLATFORM_POWERMAC) 2924 copy_and_flush(0, kbase, 0x100, 0); 2925 2926 /* 2927 * Do early parsing of command line 2928 */ 2929 early_cmdline_parse(); 2930 2931 /* 2932 * Initialize memory management within prom_init 2933 */ 2934 prom_init_mem(); 2935 2936 /* 2937 * Determine which cpu is actually running right _now_ 2938 */ 2939 prom_find_boot_cpu(); 2940 2941 /* 2942 * Initialize display devices 2943 */ 2944 prom_check_displays(); 2945 2946 #ifdef CONFIG_PPC64 2947 /* 2948 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else 2949 * that uses the allocator, we need to make sure we get the top of memory 2950 * available for us here... 2951 */ 2952 if (RELOC(of_platform) == PLATFORM_PSERIES) 2953 prom_initialize_tce_table(); 2954 #endif 2955 2956 /* 2957 * On non-powermacs, try to instantiate RTAS. PowerMacs don't 2958 * have a usable RTAS implementation. 2959 */ 2960 if (RELOC(of_platform) != PLATFORM_POWERMAC && 2961 RELOC(of_platform) != PLATFORM_OPAL) 2962 prom_instantiate_rtas(); 2963 2964 #ifdef CONFIG_PPC_POWERNV 2965 /* Detect HAL and try instanciating it & doing takeover */ 2966 if (RELOC(of_platform) == PLATFORM_PSERIES_LPAR) { 2967 prom_query_opal(); 2968 if (RELOC(of_platform) == PLATFORM_OPAL) { 2969 prom_opal_hold_cpus(); 2970 prom_opal_takeover(); 2971 } 2972 } else if (RELOC(of_platform) == PLATFORM_OPAL) 2973 prom_instantiate_opal(); 2974 #endif 2975 2976 #ifdef CONFIG_PPC64 2977 /* instantiate sml */ 2978 prom_instantiate_sml(); 2979 #endif 2980 2981 /* 2982 * On non-powermacs, put all CPUs in spin-loops. 2983 * 2984 * PowerMacs use a different mechanism to spin CPUs 2985 */ 2986 if (RELOC(of_platform) != PLATFORM_POWERMAC && 2987 RELOC(of_platform) != PLATFORM_OPAL) 2988 prom_hold_cpus(); 2989 2990 /* 2991 * Fill in some infos for use by the kernel later on 2992 */ 2993 if (RELOC(prom_memory_limit)) 2994 prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", 2995 &RELOC(prom_memory_limit), 2996 sizeof(prom_memory_limit)); 2997 #ifdef CONFIG_PPC64 2998 if (RELOC(prom_iommu_off)) 2999 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", 3000 NULL, 0); 3001 3002 if (RELOC(prom_iommu_force_on)) 3003 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", 3004 NULL, 0); 3005 3006 if (RELOC(prom_tce_alloc_start)) { 3007 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", 3008 &RELOC(prom_tce_alloc_start), 3009 sizeof(prom_tce_alloc_start)); 3010 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", 3011 &RELOC(prom_tce_alloc_end), 3012 sizeof(prom_tce_alloc_end)); 3013 } 3014 #endif 3015 3016 /* 3017 * Fixup any known bugs in the device-tree 3018 */ 3019 fixup_device_tree(); 3020 3021 /* 3022 * Now finally create the flattened device-tree 3023 */ 3024 prom_printf("copying OF device tree...\n"); 3025 flatten_device_tree(); 3026 3027 /* 3028 * in case stdin is USB and still active on IBM machines... 3029 * Unfortunately quiesce crashes on some powermacs if we have 3030 * closed stdin already (in particular the powerbook 101). It 3031 * appears that the OPAL version of OFW doesn't like it either. 3032 */ 3033 if (RELOC(of_platform) != PLATFORM_POWERMAC && 3034 RELOC(of_platform) != PLATFORM_OPAL) 3035 prom_close_stdin(); 3036 3037 /* 3038 * Call OF "quiesce" method to shut down pending DMA's from 3039 * devices etc... 3040 */ 3041 prom_printf("Calling quiesce...\n"); 3042 call_prom("quiesce", 0, 0); 3043 3044 /* 3045 * And finally, call the kernel passing it the flattened device 3046 * tree and NULL as r5, thus triggering the new entry point which 3047 * is common to us and kexec 3048 */ 3049 hdr = RELOC(dt_header_start); 3050 3051 /* Don't print anything after quiesce under OPAL, it crashes OFW */ 3052 if (RELOC(of_platform) != PLATFORM_OPAL) { 3053 prom_printf("returning from prom_init\n"); 3054 prom_debug("->dt_header_start=0x%x\n", hdr); 3055 } 3056 3057 #ifdef CONFIG_PPC32 3058 reloc_got2(-offset); 3059 #endif 3060 3061 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL 3062 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */ 3063 __start(hdr, kbase, 0, 0, 0, 3064 RELOC(prom_opal_base), RELOC(prom_opal_entry)); 3065 #else 3066 __start(hdr, kbase, 0, 0, 0, 0, 0); 3067 #endif 3068 3069 return 0; 3070 } 3071