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 * ppc64 objects are always relocatable, we just need to relocate the 70 * TOC. 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 #define ADDR(x) (u32)(unsigned long)(x) 83 84 #ifdef CONFIG_PPC64 85 #define OF_WORKAROUNDS 0 86 #else 87 #define OF_WORKAROUNDS of_workarounds 88 int of_workarounds; 89 #endif 90 91 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ 92 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ 93 94 #define PROM_BUG() do { \ 95 prom_printf("kernel BUG at %s line 0x%x!\n", \ 96 __FILE__, __LINE__); \ 97 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ 98 } while (0) 99 100 #ifdef DEBUG_PROM 101 #define prom_debug(x...) prom_printf(x) 102 #else 103 #define prom_debug(x...) 104 #endif 105 106 107 typedef u32 prom_arg_t; 108 109 struct prom_args { 110 __be32 service; 111 __be32 nargs; 112 __be32 nret; 113 __be32 args[10]; 114 }; 115 116 struct prom_t { 117 ihandle root; 118 phandle chosen; 119 int cpu; 120 ihandle stdout; 121 ihandle mmumap; 122 ihandle memory; 123 }; 124 125 struct mem_map_entry { 126 __be64 base; 127 __be64 size; 128 }; 129 130 typedef __be32 cell_t; 131 132 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5, 133 unsigned long r6, unsigned long r7, unsigned long r8, 134 unsigned long r9); 135 136 #ifdef CONFIG_PPC64 137 extern int enter_prom(struct prom_args *args, unsigned long entry); 138 #else 139 static inline int enter_prom(struct prom_args *args, unsigned long entry) 140 { 141 return ((int (*)(struct prom_args *))entry)(args); 142 } 143 #endif 144 145 extern void copy_and_flush(unsigned long dest, unsigned long src, 146 unsigned long size, unsigned long offset); 147 148 /* prom structure */ 149 static struct prom_t __initdata prom; 150 151 static unsigned long prom_entry __initdata; 152 153 #define PROM_SCRATCH_SIZE 256 154 155 static char __initdata of_stdout_device[256]; 156 static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; 157 158 static unsigned long __initdata dt_header_start; 159 static unsigned long __initdata dt_struct_start, dt_struct_end; 160 static unsigned long __initdata dt_string_start, dt_string_end; 161 162 static unsigned long __initdata prom_initrd_start, prom_initrd_end; 163 164 #ifdef CONFIG_PPC64 165 static int __initdata prom_iommu_force_on; 166 static int __initdata prom_iommu_off; 167 static unsigned long __initdata prom_tce_alloc_start; 168 static unsigned long __initdata prom_tce_alloc_end; 169 #endif 170 171 /* Platforms codes are now obsolete in the kernel. Now only used within this 172 * file and ultimately gone too. Feel free to change them if you need, they 173 * are not shared with anything outside of this file anymore 174 */ 175 #define PLATFORM_PSERIES 0x0100 176 #define PLATFORM_PSERIES_LPAR 0x0101 177 #define PLATFORM_LPAR 0x0001 178 #define PLATFORM_POWERMAC 0x0400 179 #define PLATFORM_GENERIC 0x0500 180 #define PLATFORM_OPAL 0x0600 181 182 static int __initdata of_platform; 183 184 static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; 185 186 static unsigned long __initdata prom_memory_limit; 187 188 static unsigned long __initdata alloc_top; 189 static unsigned long __initdata alloc_top_high; 190 static unsigned long __initdata alloc_bottom; 191 static unsigned long __initdata rmo_top; 192 static unsigned long __initdata ram_top; 193 194 static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; 195 static int __initdata mem_reserve_cnt; 196 197 static cell_t __initdata regbuf[1024]; 198 199 static bool rtas_has_query_cpu_stopped; 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 = cpu_to_be32(ADDR(service)); 225 args.nargs = cpu_to_be32(nargs); 226 args.nret = cpu_to_be32(nret); 227 228 va_start(list, nret); 229 for (i = 0; i < nargs; i++) 230 args.args[i] = cpu_to_be32(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, prom_entry) < 0) 237 return PROM_ERROR; 238 239 return (nret > 0) ? be32_to_cpu(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 = cpu_to_be32(ADDR(service)); 250 args.nargs = cpu_to_be32(nargs); 251 args.nret = cpu_to_be32(nret); 252 253 va_start(list, rets); 254 for (i = 0; i < nargs; i++) 255 args.args[i] = cpu_to_be32(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, prom_entry) < 0) 262 return PROM_ERROR; 263 264 if (rets != NULL) 265 for (i = 1; i < nret; ++i) 266 rets[i-1] = be32_to_cpu(args.args[nargs+i]); 267 268 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; 269 } 270 271 272 static void __init prom_print(const char *msg) 273 { 274 const char *p, *q; 275 276 if (prom.stdout == 0) 277 return; 278 279 for (p = msg; *p != 0; p = q) { 280 for (q = p; *q != 0 && *q != '\n'; ++q) 281 ; 282 if (q > p) 283 call_prom("write", 3, 1, prom.stdout, p, q - p); 284 if (*q == 0) 285 break; 286 ++q; 287 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2); 288 } 289 } 290 291 292 static void __init prom_print_hex(unsigned long val) 293 { 294 int i, nibbles = sizeof(val)*2; 295 char buf[sizeof(val)*2+1]; 296 297 for (i = nibbles-1; i >= 0; i--) { 298 buf[i] = (val & 0xf) + '0'; 299 if (buf[i] > '9') 300 buf[i] += ('a'-'0'-10); 301 val >>= 4; 302 } 303 buf[nibbles] = '\0'; 304 call_prom("write", 3, 1, prom.stdout, buf, nibbles); 305 } 306 307 /* max number of decimal digits in an unsigned long */ 308 #define UL_DIGITS 21 309 static void __init prom_print_dec(unsigned long val) 310 { 311 int i, size; 312 char buf[UL_DIGITS+1]; 313 314 for (i = UL_DIGITS-1; i >= 0; i--) { 315 buf[i] = (val % 10) + '0'; 316 val = val/10; 317 if (val == 0) 318 break; 319 } 320 /* shift stuff down */ 321 size = UL_DIGITS - i; 322 call_prom("write", 3, 1, prom.stdout, buf+i, size); 323 } 324 325 static void __init prom_printf(const char *format, ...) 326 { 327 const char *p, *q, *s; 328 va_list args; 329 unsigned long v; 330 long vs; 331 332 va_start(args, format); 333 for (p = format; *p != 0; p = q) { 334 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) 335 ; 336 if (q > p) 337 call_prom("write", 3, 1, prom.stdout, p, q - p); 338 if (*q == 0) 339 break; 340 if (*q == '\n') { 341 ++q; 342 call_prom("write", 3, 1, prom.stdout, 343 ADDR("\r\n"), 2); 344 continue; 345 } 346 ++q; 347 if (*q == 0) 348 break; 349 switch (*q) { 350 case 's': 351 ++q; 352 s = va_arg(args, const char *); 353 prom_print(s); 354 break; 355 case 'x': 356 ++q; 357 v = va_arg(args, unsigned long); 358 prom_print_hex(v); 359 break; 360 case 'd': 361 ++q; 362 vs = va_arg(args, int); 363 if (vs < 0) { 364 prom_print("-"); 365 vs = -vs; 366 } 367 prom_print_dec(vs); 368 break; 369 case 'l': 370 ++q; 371 if (*q == 0) 372 break; 373 else if (*q == 'x') { 374 ++q; 375 v = va_arg(args, unsigned long); 376 prom_print_hex(v); 377 } else if (*q == 'u') { /* '%lu' */ 378 ++q; 379 v = va_arg(args, unsigned long); 380 prom_print_dec(v); 381 } else if (*q == 'd') { /* %ld */ 382 ++q; 383 vs = va_arg(args, long); 384 if (vs < 0) { 385 prom_print("-"); 386 vs = -vs; 387 } 388 prom_print_dec(vs); 389 } 390 break; 391 } 392 } 393 } 394 395 396 static unsigned int __init prom_claim(unsigned long virt, unsigned long size, 397 unsigned long align) 398 { 399 400 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { 401 /* 402 * Old OF requires we claim physical and virtual separately 403 * and then map explicitly (assuming virtual mode) 404 */ 405 int ret; 406 prom_arg_t result; 407 408 ret = call_prom_ret("call-method", 5, 2, &result, 409 ADDR("claim"), prom.memory, 410 align, size, virt); 411 if (ret != 0 || result == -1) 412 return -1; 413 ret = call_prom_ret("call-method", 5, 2, &result, 414 ADDR("claim"), prom.mmumap, 415 align, size, virt); 416 if (ret != 0) { 417 call_prom("call-method", 4, 1, ADDR("release"), 418 prom.memory, size, virt); 419 return -1; 420 } 421 /* the 0x12 is M (coherence) + PP == read/write */ 422 call_prom("call-method", 6, 1, 423 ADDR("map"), prom.mmumap, 0x12, size, virt, virt); 424 return virt; 425 } 426 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, 427 (prom_arg_t)align); 428 } 429 430 static void __init __attribute__((noreturn)) prom_panic(const char *reason) 431 { 432 prom_print(reason); 433 /* Do not call exit because it clears the screen on pmac 434 * it also causes some sort of double-fault on early pmacs */ 435 if (of_platform == PLATFORM_POWERMAC) 436 asm("trap\n"); 437 438 /* ToDo: should put up an SRC here on pSeries */ 439 call_prom("exit", 0, 0); 440 441 for (;;) /* should never get here */ 442 ; 443 } 444 445 446 static int __init prom_next_node(phandle *nodep) 447 { 448 phandle node; 449 450 if ((node = *nodep) != 0 451 && (*nodep = call_prom("child", 1, 1, node)) != 0) 452 return 1; 453 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 454 return 1; 455 for (;;) { 456 if ((node = call_prom("parent", 1, 1, node)) == 0) 457 return 0; 458 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 459 return 1; 460 } 461 } 462 463 static int inline prom_getprop(phandle node, const char *pname, 464 void *value, size_t valuelen) 465 { 466 return call_prom("getprop", 4, 1, node, ADDR(pname), 467 (u32)(unsigned long) value, (u32) valuelen); 468 } 469 470 static int inline prom_getproplen(phandle node, const char *pname) 471 { 472 return call_prom("getproplen", 2, 1, node, ADDR(pname)); 473 } 474 475 static void add_string(char **str, const char *q) 476 { 477 char *p = *str; 478 479 while (*q) 480 *p++ = *q++; 481 *p++ = ' '; 482 *str = p; 483 } 484 485 static char *tohex(unsigned int x) 486 { 487 static char digits[] = "0123456789abcdef"; 488 static char result[9]; 489 int i; 490 491 result[8] = 0; 492 i = 8; 493 do { 494 --i; 495 result[i] = digits[x & 0xf]; 496 x >>= 4; 497 } while (x != 0 && i > 0); 498 return &result[i]; 499 } 500 501 static int __init prom_setprop(phandle node, const char *nodename, 502 const char *pname, void *value, size_t valuelen) 503 { 504 char cmd[256], *p; 505 506 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) 507 return call_prom("setprop", 4, 1, node, ADDR(pname), 508 (u32)(unsigned long) value, (u32) valuelen); 509 510 /* gah... setprop doesn't work on longtrail, have to use interpret */ 511 p = cmd; 512 add_string(&p, "dev"); 513 add_string(&p, nodename); 514 add_string(&p, tohex((u32)(unsigned long) value)); 515 add_string(&p, tohex(valuelen)); 516 add_string(&p, tohex(ADDR(pname))); 517 add_string(&p, tohex(strlen(pname))); 518 add_string(&p, "property"); 519 *p = 0; 520 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); 521 } 522 523 /* We can't use the standard versions because of relocation headaches. */ 524 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ 525 || ('a' <= (c) && (c) <= 'f') \ 526 || ('A' <= (c) && (c) <= 'F')) 527 528 #define isdigit(c) ('0' <= (c) && (c) <= '9') 529 #define islower(c) ('a' <= (c) && (c) <= 'z') 530 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) 531 532 static unsigned long prom_strtoul(const char *cp, const char **endp) 533 { 534 unsigned long result = 0, base = 10, value; 535 536 if (*cp == '0') { 537 base = 8; 538 cp++; 539 if (toupper(*cp) == 'X') { 540 cp++; 541 base = 16; 542 } 543 } 544 545 while (isxdigit(*cp) && 546 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { 547 result = result * base + value; 548 cp++; 549 } 550 551 if (endp) 552 *endp = cp; 553 554 return result; 555 } 556 557 static unsigned long prom_memparse(const char *ptr, const char **retptr) 558 { 559 unsigned long ret = prom_strtoul(ptr, retptr); 560 int shift = 0; 561 562 /* 563 * We can't use a switch here because GCC *may* generate a 564 * jump table which won't work, because we're not running at 565 * the address we're linked at. 566 */ 567 if ('G' == **retptr || 'g' == **retptr) 568 shift = 30; 569 570 if ('M' == **retptr || 'm' == **retptr) 571 shift = 20; 572 573 if ('K' == **retptr || 'k' == **retptr) 574 shift = 10; 575 576 if (shift) { 577 ret <<= shift; 578 (*retptr)++; 579 } 580 581 return ret; 582 } 583 584 /* 585 * Early parsing of the command line passed to the kernel, used for 586 * "mem=x" and the options that affect the iommu 587 */ 588 static void __init early_cmdline_parse(void) 589 { 590 const char *opt; 591 592 char *p; 593 int l = 0; 594 595 prom_cmd_line[0] = 0; 596 p = prom_cmd_line; 597 if ((long)prom.chosen > 0) 598 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1); 599 #ifdef CONFIG_CMDLINE 600 if (l <= 0 || p[0] == '\0') /* dbl check */ 601 strlcpy(prom_cmd_line, 602 CONFIG_CMDLINE, sizeof(prom_cmd_line)); 603 #endif /* CONFIG_CMDLINE */ 604 prom_printf("command line: %s\n", prom_cmd_line); 605 606 #ifdef CONFIG_PPC64 607 opt = strstr(prom_cmd_line, "iommu="); 608 if (opt) { 609 prom_printf("iommu opt is: %s\n", opt); 610 opt += 6; 611 while (*opt && *opt == ' ') 612 opt++; 613 if (!strncmp(opt, "off", 3)) 614 prom_iommu_off = 1; 615 else if (!strncmp(opt, "force", 5)) 616 prom_iommu_force_on = 1; 617 } 618 #endif 619 opt = strstr(prom_cmd_line, "mem="); 620 if (opt) { 621 opt += 4; 622 prom_memory_limit = prom_memparse(opt, (const char **)&opt); 623 #ifdef CONFIG_PPC64 624 /* Align to 16 MB == size of ppc64 large page */ 625 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000); 626 #endif 627 } 628 } 629 630 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 631 /* 632 * The architecture vector has an array of PVR mask/value pairs, 633 * followed by # option vectors - 1, followed by the option vectors. 634 * 635 * See prom.h for the definition of the bits specified in the 636 * architecture vector. 637 * 638 * Because the description vector contains a mix of byte and word 639 * values, we declare it as an unsigned char array, and use this 640 * macro to put word values in. 641 */ 642 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ 643 ((x) >> 8) & 0xff, (x) & 0xff 644 645 unsigned char ibm_architecture_vec[] = { 646 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ 647 W(0xffff0000), W(0x003e0000), /* POWER6 */ 648 W(0xffff0000), W(0x003f0000), /* POWER7 */ 649 W(0xffff0000), W(0x004b0000), /* POWER8E */ 650 W(0xffff0000), W(0x004d0000), /* POWER8 */ 651 W(0xffffffff), W(0x0f000004), /* all 2.07-compliant */ 652 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ 653 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ 654 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ 655 6 - 1, /* 6 option vectors */ 656 657 /* option vector 1: processor architectures supported */ 658 3 - 2, /* length */ 659 0, /* don't ignore, don't halt */ 660 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | 661 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07, 662 663 /* option vector 2: Open Firmware options supported */ 664 34 - 2, /* length */ 665 OV2_REAL_MODE, 666 0, 0, 667 W(0xffffffff), /* real_base */ 668 W(0xffffffff), /* real_size */ 669 W(0xffffffff), /* virt_base */ 670 W(0xffffffff), /* virt_size */ 671 W(0xffffffff), /* load_base */ 672 W(256), /* 256MB min RMA */ 673 W(0xffffffff), /* full client load */ 674 0, /* min RMA percentage of total RAM */ 675 48, /* max log_2(hash table size) */ 676 677 /* option vector 3: processor options supported */ 678 3 - 2, /* length */ 679 0, /* don't ignore, don't halt */ 680 OV3_FP | OV3_VMX | OV3_DFP, 681 682 /* option vector 4: IBM PAPR implementation */ 683 3 - 2, /* length */ 684 0, /* don't halt */ 685 OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */ 686 687 /* option vector 5: PAPR/OF options */ 688 19 - 2, /* length */ 689 0, /* don't ignore, don't halt */ 690 OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) | 691 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) | 692 #ifdef CONFIG_PCI_MSI 693 /* PCIe/MSI support. Without MSI full PCIe is not supported */ 694 OV5_FEAT(OV5_MSI), 695 #else 696 0, 697 #endif 698 0, 699 #ifdef CONFIG_PPC_SMLPAR 700 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO), 701 #else 702 0, 703 #endif 704 OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN), 705 0, 706 0, 707 0, 708 /* WARNING: The offset of the "number of cores" field below 709 * must match by the macro below. Update the definition if 710 * the structure layout changes. 711 */ 712 #define IBM_ARCH_VEC_NRCORES_OFFSET 125 713 W(NR_CPUS), /* number of cores supported */ 714 0, 715 0, 716 0, 717 0, 718 OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | 719 OV5_FEAT(OV5_PFO_HW_842), 720 OV5_FEAT(OV5_SUB_PROCESSORS), 721 /* option vector 6: IBM PAPR hints */ 722 4 - 2, /* length */ 723 0, 724 0, 725 OV6_LINUX, 726 727 }; 728 729 /* Old method - ELF header with PT_NOTE sections only works on BE */ 730 #ifdef __BIG_ENDIAN__ 731 static struct fake_elf { 732 Elf32_Ehdr elfhdr; 733 Elf32_Phdr phdr[2]; 734 struct chrpnote { 735 u32 namesz; 736 u32 descsz; 737 u32 type; 738 char name[8]; /* "PowerPC" */ 739 struct chrpdesc { 740 u32 real_mode; 741 u32 real_base; 742 u32 real_size; 743 u32 virt_base; 744 u32 virt_size; 745 u32 load_base; 746 } chrpdesc; 747 } chrpnote; 748 struct rpanote { 749 u32 namesz; 750 u32 descsz; 751 u32 type; 752 char name[24]; /* "IBM,RPA-Client-Config" */ 753 struct rpadesc { 754 u32 lpar_affinity; 755 u32 min_rmo_size; 756 u32 min_rmo_percent; 757 u32 max_pft_size; 758 u32 splpar; 759 u32 min_load; 760 u32 new_mem_def; 761 u32 ignore_me; 762 } rpadesc; 763 } rpanote; 764 } fake_elf = { 765 .elfhdr = { 766 .e_ident = { 0x7f, 'E', 'L', 'F', 767 ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, 768 .e_type = ET_EXEC, /* yeah right */ 769 .e_machine = EM_PPC, 770 .e_version = EV_CURRENT, 771 .e_phoff = offsetof(struct fake_elf, phdr), 772 .e_phentsize = sizeof(Elf32_Phdr), 773 .e_phnum = 2 774 }, 775 .phdr = { 776 [0] = { 777 .p_type = PT_NOTE, 778 .p_offset = offsetof(struct fake_elf, chrpnote), 779 .p_filesz = sizeof(struct chrpnote) 780 }, [1] = { 781 .p_type = PT_NOTE, 782 .p_offset = offsetof(struct fake_elf, rpanote), 783 .p_filesz = sizeof(struct rpanote) 784 } 785 }, 786 .chrpnote = { 787 .namesz = sizeof("PowerPC"), 788 .descsz = sizeof(struct chrpdesc), 789 .type = 0x1275, 790 .name = "PowerPC", 791 .chrpdesc = { 792 .real_mode = ~0U, /* ~0 means "don't care" */ 793 .real_base = ~0U, 794 .real_size = ~0U, 795 .virt_base = ~0U, 796 .virt_size = ~0U, 797 .load_base = ~0U 798 }, 799 }, 800 .rpanote = { 801 .namesz = sizeof("IBM,RPA-Client-Config"), 802 .descsz = sizeof(struct rpadesc), 803 .type = 0x12759999, 804 .name = "IBM,RPA-Client-Config", 805 .rpadesc = { 806 .lpar_affinity = 0, 807 .min_rmo_size = 64, /* in megabytes */ 808 .min_rmo_percent = 0, 809 .max_pft_size = 48, /* 2^48 bytes max PFT size */ 810 .splpar = 1, 811 .min_load = ~0U, 812 .new_mem_def = 0 813 } 814 } 815 }; 816 #endif /* __BIG_ENDIAN__ */ 817 818 static int __init prom_count_smt_threads(void) 819 { 820 phandle node; 821 char type[64]; 822 unsigned int plen; 823 824 /* Pick up th first CPU node we can find */ 825 for (node = 0; prom_next_node(&node); ) { 826 type[0] = 0; 827 prom_getprop(node, "device_type", type, sizeof(type)); 828 829 if (strcmp(type, "cpu")) 830 continue; 831 /* 832 * There is an entry for each smt thread, each entry being 833 * 4 bytes long. All cpus should have the same number of 834 * smt threads, so return after finding the first. 835 */ 836 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); 837 if (plen == PROM_ERROR) 838 break; 839 plen >>= 2; 840 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen); 841 842 /* Sanity check */ 843 if (plen < 1 || plen > 64) { 844 prom_printf("Threads per core %lu out of bounds, assuming 1\n", 845 (unsigned long)plen); 846 return 1; 847 } 848 return plen; 849 } 850 prom_debug("No threads found, assuming 1 per core\n"); 851 852 return 1; 853 854 } 855 856 857 static void __init prom_send_capabilities(void) 858 { 859 ihandle root; 860 prom_arg_t ret; 861 u32 cores; 862 unsigned char *ptcores; 863 864 root = call_prom("open", 1, 1, ADDR("/")); 865 if (root != 0) { 866 /* We need to tell the FW about the number of cores we support. 867 * 868 * To do that, we count the number of threads on the first core 869 * (we assume this is the same for all cores) and use it to 870 * divide NR_CPUS. 871 */ 872 873 /* The core value may start at an odd address. If such a word 874 * access is made at a cache line boundary, this leads to an 875 * exception which may not be handled at this time. 876 * Forcing a per byte access to avoid exception. 877 */ 878 ptcores = &ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]; 879 cores = 0; 880 cores |= ptcores[0] << 24; 881 cores |= ptcores[1] << 16; 882 cores |= ptcores[2] << 8; 883 cores |= ptcores[3]; 884 if (cores != NR_CPUS) { 885 prom_printf("WARNING ! " 886 "ibm_architecture_vec structure inconsistent: %lu!\n", 887 cores); 888 } else { 889 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); 890 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n", 891 cores, NR_CPUS); 892 ptcores[0] = (cores >> 24) & 0xff; 893 ptcores[1] = (cores >> 16) & 0xff; 894 ptcores[2] = (cores >> 8) & 0xff; 895 ptcores[3] = cores & 0xff; 896 } 897 898 /* try calling the ibm,client-architecture-support method */ 899 prom_printf("Calling ibm,client-architecture-support..."); 900 if (call_prom_ret("call-method", 3, 2, &ret, 901 ADDR("ibm,client-architecture-support"), 902 root, 903 ADDR(ibm_architecture_vec)) == 0) { 904 /* the call exists... */ 905 if (ret) 906 prom_printf("\nWARNING: ibm,client-architecture" 907 "-support call FAILED!\n"); 908 call_prom("close", 1, 0, root); 909 prom_printf(" done\n"); 910 return; 911 } 912 call_prom("close", 1, 0, root); 913 prom_printf(" not implemented\n"); 914 } 915 916 #ifdef __BIG_ENDIAN__ 917 { 918 ihandle elfloader; 919 920 /* no ibm,client-architecture-support call, try the old way */ 921 elfloader = call_prom("open", 1, 1, 922 ADDR("/packages/elf-loader")); 923 if (elfloader == 0) { 924 prom_printf("couldn't open /packages/elf-loader\n"); 925 return; 926 } 927 call_prom("call-method", 3, 1, ADDR("process-elf-header"), 928 elfloader, ADDR(&fake_elf)); 929 call_prom("close", 1, 0, elfloader); 930 } 931 #endif /* __BIG_ENDIAN__ */ 932 } 933 #endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ 934 935 /* 936 * Memory allocation strategy... our layout is normally: 937 * 938 * at 14Mb or more we have vmlinux, then a gap and initrd. In some 939 * rare cases, initrd might end up being before the kernel though. 940 * We assume this won't override the final kernel at 0, we have no 941 * provision to handle that in this version, but it should hopefully 942 * never happen. 943 * 944 * alloc_top is set to the top of RMO, eventually shrink down if the 945 * TCEs overlap 946 * 947 * alloc_bottom is set to the top of kernel/initrd 948 * 949 * from there, allocations are done this way : rtas is allocated 950 * topmost, and the device-tree is allocated from the bottom. We try 951 * to grow the device-tree allocation as we progress. If we can't, 952 * then we fail, we don't currently have a facility to restart 953 * elsewhere, but that shouldn't be necessary. 954 * 955 * Note that calls to reserve_mem have to be done explicitly, memory 956 * allocated with either alloc_up or alloc_down isn't automatically 957 * reserved. 958 */ 959 960 961 /* 962 * Allocates memory in the RMO upward from the kernel/initrd 963 * 964 * When align is 0, this is a special case, it means to allocate in place 965 * at the current location of alloc_bottom or fail (that is basically 966 * extending the previous allocation). Used for the device-tree flattening 967 */ 968 static unsigned long __init alloc_up(unsigned long size, unsigned long align) 969 { 970 unsigned long base = alloc_bottom; 971 unsigned long addr = 0; 972 973 if (align) 974 base = _ALIGN_UP(base, align); 975 prom_debug("alloc_up(%x, %x)\n", size, align); 976 if (ram_top == 0) 977 prom_panic("alloc_up() called with mem not initialized\n"); 978 979 if (align) 980 base = _ALIGN_UP(alloc_bottom, align); 981 else 982 base = alloc_bottom; 983 984 for(; (base + size) <= alloc_top; 985 base = _ALIGN_UP(base + 0x100000, align)) { 986 prom_debug(" trying: 0x%x\n\r", base); 987 addr = (unsigned long)prom_claim(base, size, 0); 988 if (addr != PROM_ERROR && addr != 0) 989 break; 990 addr = 0; 991 if (align == 0) 992 break; 993 } 994 if (addr == 0) 995 return 0; 996 alloc_bottom = addr + size; 997 998 prom_debug(" -> %x\n", addr); 999 prom_debug(" alloc_bottom : %x\n", alloc_bottom); 1000 prom_debug(" alloc_top : %x\n", alloc_top); 1001 prom_debug(" alloc_top_hi : %x\n", alloc_top_high); 1002 prom_debug(" rmo_top : %x\n", rmo_top); 1003 prom_debug(" ram_top : %x\n", ram_top); 1004 1005 return addr; 1006 } 1007 1008 /* 1009 * Allocates memory downward, either from top of RMO, or if highmem 1010 * is set, from the top of RAM. Note that this one doesn't handle 1011 * failures. It does claim memory if highmem is not set. 1012 */ 1013 static unsigned long __init alloc_down(unsigned long size, unsigned long align, 1014 int highmem) 1015 { 1016 unsigned long base, addr = 0; 1017 1018 prom_debug("alloc_down(%x, %x, %s)\n", size, align, 1019 highmem ? "(high)" : "(low)"); 1020 if (ram_top == 0) 1021 prom_panic("alloc_down() called with mem not initialized\n"); 1022 1023 if (highmem) { 1024 /* Carve out storage for the TCE table. */ 1025 addr = _ALIGN_DOWN(alloc_top_high - size, align); 1026 if (addr <= alloc_bottom) 1027 return 0; 1028 /* Will we bump into the RMO ? If yes, check out that we 1029 * didn't overlap existing allocations there, if we did, 1030 * we are dead, we must be the first in town ! 1031 */ 1032 if (addr < rmo_top) { 1033 /* Good, we are first */ 1034 if (alloc_top == rmo_top) 1035 alloc_top = rmo_top = addr; 1036 else 1037 return 0; 1038 } 1039 alloc_top_high = addr; 1040 goto bail; 1041 } 1042 1043 base = _ALIGN_DOWN(alloc_top - size, align); 1044 for (; base > alloc_bottom; 1045 base = _ALIGN_DOWN(base - 0x100000, align)) { 1046 prom_debug(" trying: 0x%x\n\r", base); 1047 addr = (unsigned long)prom_claim(base, size, 0); 1048 if (addr != PROM_ERROR && addr != 0) 1049 break; 1050 addr = 0; 1051 } 1052 if (addr == 0) 1053 return 0; 1054 alloc_top = addr; 1055 1056 bail: 1057 prom_debug(" -> %x\n", addr); 1058 prom_debug(" alloc_bottom : %x\n", alloc_bottom); 1059 prom_debug(" alloc_top : %x\n", alloc_top); 1060 prom_debug(" alloc_top_hi : %x\n", alloc_top_high); 1061 prom_debug(" rmo_top : %x\n", rmo_top); 1062 prom_debug(" ram_top : %x\n", ram_top); 1063 1064 return addr; 1065 } 1066 1067 /* 1068 * Parse a "reg" cell 1069 */ 1070 static unsigned long __init prom_next_cell(int s, cell_t **cellp) 1071 { 1072 cell_t *p = *cellp; 1073 unsigned long r = 0; 1074 1075 /* Ignore more than 2 cells */ 1076 while (s > sizeof(unsigned long) / 4) { 1077 p++; 1078 s--; 1079 } 1080 r = be32_to_cpu(*p++); 1081 #ifdef CONFIG_PPC64 1082 if (s > 1) { 1083 r <<= 32; 1084 r |= be32_to_cpu(*(p++)); 1085 } 1086 #endif 1087 *cellp = p; 1088 return r; 1089 } 1090 1091 /* 1092 * Very dumb function for adding to the memory reserve list, but 1093 * we don't need anything smarter at this point 1094 * 1095 * XXX Eventually check for collisions. They should NEVER happen. 1096 * If problems seem to show up, it would be a good start to track 1097 * them down. 1098 */ 1099 static void __init reserve_mem(u64 base, u64 size) 1100 { 1101 u64 top = base + size; 1102 unsigned long cnt = mem_reserve_cnt; 1103 1104 if (size == 0) 1105 return; 1106 1107 /* We need to always keep one empty entry so that we 1108 * have our terminator with "size" set to 0 since we are 1109 * dumb and just copy this entire array to the boot params 1110 */ 1111 base = _ALIGN_DOWN(base, PAGE_SIZE); 1112 top = _ALIGN_UP(top, PAGE_SIZE); 1113 size = top - base; 1114 1115 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) 1116 prom_panic("Memory reserve map exhausted !\n"); 1117 mem_reserve_map[cnt].base = cpu_to_be64(base); 1118 mem_reserve_map[cnt].size = cpu_to_be64(size); 1119 mem_reserve_cnt = cnt + 1; 1120 } 1121 1122 /* 1123 * Initialize memory allocation mechanism, parse "memory" nodes and 1124 * obtain that way the top of memory and RMO to setup out local allocator 1125 */ 1126 static void __init prom_init_mem(void) 1127 { 1128 phandle node; 1129 char *path, type[64]; 1130 unsigned int plen; 1131 cell_t *p, *endp; 1132 __be32 val; 1133 u32 rac, rsc; 1134 1135 /* 1136 * We iterate the memory nodes to find 1137 * 1) top of RMO (first node) 1138 * 2) top of memory 1139 */ 1140 val = cpu_to_be32(2); 1141 prom_getprop(prom.root, "#address-cells", &val, sizeof(val)); 1142 rac = be32_to_cpu(val); 1143 val = cpu_to_be32(1); 1144 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc)); 1145 rsc = be32_to_cpu(val); 1146 prom_debug("root_addr_cells: %x\n", rac); 1147 prom_debug("root_size_cells: %x\n", rsc); 1148 1149 prom_debug("scanning memory:\n"); 1150 path = prom_scratch; 1151 1152 for (node = 0; prom_next_node(&node); ) { 1153 type[0] = 0; 1154 prom_getprop(node, "device_type", type, sizeof(type)); 1155 1156 if (type[0] == 0) { 1157 /* 1158 * CHRP Longtrail machines have no device_type 1159 * on the memory node, so check the name instead... 1160 */ 1161 prom_getprop(node, "name", type, sizeof(type)); 1162 } 1163 if (strcmp(type, "memory")) 1164 continue; 1165 1166 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf)); 1167 if (plen > sizeof(regbuf)) { 1168 prom_printf("memory node too large for buffer !\n"); 1169 plen = sizeof(regbuf); 1170 } 1171 p = regbuf; 1172 endp = p + (plen / sizeof(cell_t)); 1173 1174 #ifdef DEBUG_PROM 1175 memset(path, 0, PROM_SCRATCH_SIZE); 1176 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 1177 prom_debug(" node %s :\n", path); 1178 #endif /* DEBUG_PROM */ 1179 1180 while ((endp - p) >= (rac + rsc)) { 1181 unsigned long base, size; 1182 1183 base = prom_next_cell(rac, &p); 1184 size = prom_next_cell(rsc, &p); 1185 1186 if (size == 0) 1187 continue; 1188 prom_debug(" %x %x\n", base, size); 1189 if (base == 0 && (of_platform & PLATFORM_LPAR)) 1190 rmo_top = size; 1191 if ((base + size) > ram_top) 1192 ram_top = base + size; 1193 } 1194 } 1195 1196 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000); 1197 1198 /* 1199 * If prom_memory_limit is set we reduce the upper limits *except* for 1200 * alloc_top_high. This must be the real top of RAM so we can put 1201 * TCE's up there. 1202 */ 1203 1204 alloc_top_high = ram_top; 1205 1206 if (prom_memory_limit) { 1207 if (prom_memory_limit <= alloc_bottom) { 1208 prom_printf("Ignoring mem=%x <= alloc_bottom.\n", 1209 prom_memory_limit); 1210 prom_memory_limit = 0; 1211 } else if (prom_memory_limit >= ram_top) { 1212 prom_printf("Ignoring mem=%x >= ram_top.\n", 1213 prom_memory_limit); 1214 prom_memory_limit = 0; 1215 } else { 1216 ram_top = prom_memory_limit; 1217 rmo_top = min(rmo_top, prom_memory_limit); 1218 } 1219 } 1220 1221 /* 1222 * Setup our top alloc point, that is top of RMO or top of 1223 * segment 0 when running non-LPAR. 1224 * Some RS64 machines have buggy firmware where claims up at 1225 * 1GB fail. Cap at 768MB as a workaround. 1226 * Since 768MB is plenty of room, and we need to cap to something 1227 * reasonable on 32-bit, cap at 768MB on all machines. 1228 */ 1229 if (!rmo_top) 1230 rmo_top = ram_top; 1231 rmo_top = min(0x30000000ul, rmo_top); 1232 alloc_top = rmo_top; 1233 alloc_top_high = ram_top; 1234 1235 /* 1236 * Check if we have an initrd after the kernel but still inside 1237 * the RMO. If we do move our bottom point to after it. 1238 */ 1239 if (prom_initrd_start && 1240 prom_initrd_start < rmo_top && 1241 prom_initrd_end > alloc_bottom) 1242 alloc_bottom = PAGE_ALIGN(prom_initrd_end); 1243 1244 prom_printf("memory layout at init:\n"); 1245 prom_printf(" memory_limit : %x (16 MB aligned)\n", prom_memory_limit); 1246 prom_printf(" alloc_bottom : %x\n", alloc_bottom); 1247 prom_printf(" alloc_top : %x\n", alloc_top); 1248 prom_printf(" alloc_top_hi : %x\n", alloc_top_high); 1249 prom_printf(" rmo_top : %x\n", rmo_top); 1250 prom_printf(" ram_top : %x\n", ram_top); 1251 } 1252 1253 static void __init prom_close_stdin(void) 1254 { 1255 __be32 val; 1256 ihandle stdin; 1257 1258 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) { 1259 stdin = be32_to_cpu(val); 1260 call_prom("close", 1, 0, stdin); 1261 } 1262 } 1263 1264 #ifdef CONFIG_PPC_POWERNV 1265 1266 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL 1267 static u64 __initdata prom_opal_base; 1268 static u64 __initdata prom_opal_entry; 1269 #endif 1270 1271 #ifdef __BIG_ENDIAN__ 1272 /* XXX Don't change this structure without updating opal-takeover.S */ 1273 static struct opal_secondary_data { 1274 s64 ack; /* 0 */ 1275 u64 go; /* 8 */ 1276 struct opal_takeover_args args; /* 16 */ 1277 } opal_secondary_data; 1278 1279 static u64 __initdata prom_opal_align; 1280 static u64 __initdata prom_opal_size; 1281 static int __initdata prom_rtas_start_cpu; 1282 static u64 __initdata prom_rtas_data; 1283 static u64 __initdata prom_rtas_entry; 1284 1285 extern char opal_secondary_entry; 1286 1287 static void __init prom_query_opal(void) 1288 { 1289 long rc; 1290 1291 /* We must not query for OPAL presence on a machine that 1292 * supports TNK takeover (970 blades), as this uses the same 1293 * h-call with different arguments and will crash 1294 */ 1295 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, 1296 ADDR("/tnk-memory-map")))) { 1297 prom_printf("TNK takeover detected, skipping OPAL check\n"); 1298 return; 1299 } 1300 1301 prom_printf("Querying for OPAL presence... "); 1302 1303 rc = opal_query_takeover(&prom_opal_size, 1304 &prom_opal_align); 1305 prom_debug("(rc = %ld) ", rc); 1306 if (rc != 0) { 1307 prom_printf("not there.\n"); 1308 return; 1309 } 1310 of_platform = PLATFORM_OPAL; 1311 prom_printf(" there !\n"); 1312 prom_debug(" opal_size = 0x%lx\n", prom_opal_size); 1313 prom_debug(" opal_align = 0x%lx\n", prom_opal_align); 1314 if (prom_opal_align < 0x10000) 1315 prom_opal_align = 0x10000; 1316 } 1317 1318 static int __init prom_rtas_call(int token, int nargs, int nret, 1319 int *outputs, ...) 1320 { 1321 struct rtas_args rtas_args; 1322 va_list list; 1323 int i; 1324 1325 rtas_args.token = token; 1326 rtas_args.nargs = nargs; 1327 rtas_args.nret = nret; 1328 rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]); 1329 va_start(list, outputs); 1330 for (i = 0; i < nargs; ++i) 1331 rtas_args.args[i] = va_arg(list, rtas_arg_t); 1332 va_end(list); 1333 1334 for (i = 0; i < nret; ++i) 1335 rtas_args.rets[i] = 0; 1336 1337 opal_enter_rtas(&rtas_args, prom_rtas_data, 1338 prom_rtas_entry); 1339 1340 if (nret > 1 && outputs != NULL) 1341 for (i = 0; i < nret-1; ++i) 1342 outputs[i] = rtas_args.rets[i+1]; 1343 return (nret > 0)? rtas_args.rets[0]: 0; 1344 } 1345 1346 static void __init prom_opal_hold_cpus(void) 1347 { 1348 int i, cnt, cpu, rc; 1349 long j; 1350 phandle node; 1351 char type[64]; 1352 u32 servers[8]; 1353 void *entry = (unsigned long *)&opal_secondary_entry; 1354 struct opal_secondary_data *data = &opal_secondary_data; 1355 1356 prom_debug("prom_opal_hold_cpus: start...\n"); 1357 prom_debug(" - entry = 0x%x\n", entry); 1358 prom_debug(" - data = 0x%x\n", data); 1359 1360 data->ack = -1; 1361 data->go = 0; 1362 1363 /* look for cpus */ 1364 for (node = 0; prom_next_node(&node); ) { 1365 type[0] = 0; 1366 prom_getprop(node, "device_type", type, sizeof(type)); 1367 if (strcmp(type, "cpu") != 0) 1368 continue; 1369 1370 /* Skip non-configured cpus. */ 1371 if (prom_getprop(node, "status", type, sizeof(type)) > 0) 1372 if (strcmp(type, "okay") != 0) 1373 continue; 1374 1375 cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers, 1376 sizeof(servers)); 1377 if (cnt == PROM_ERROR) 1378 break; 1379 cnt >>= 2; 1380 for (i = 0; i < cnt; i++) { 1381 cpu = servers[i]; 1382 prom_debug("CPU %d ... ", cpu); 1383 if (cpu == prom.cpu) { 1384 prom_debug("booted !\n"); 1385 continue; 1386 } 1387 prom_debug("starting ... "); 1388 1389 /* Init the acknowledge var which will be reset by 1390 * the secondary cpu when it awakens from its OF 1391 * spinloop. 1392 */ 1393 data->ack = -1; 1394 rc = prom_rtas_call(prom_rtas_start_cpu, 3, 1, 1395 NULL, cpu, entry, data); 1396 prom_debug("rtas rc=%d ...", rc); 1397 1398 for (j = 0; j < 100000000 && data->ack == -1; j++) { 1399 HMT_low(); 1400 mb(); 1401 } 1402 HMT_medium(); 1403 if (data->ack != -1) 1404 prom_debug("done, PIR=0x%x\n", data->ack); 1405 else 1406 prom_debug("timeout !\n"); 1407 } 1408 } 1409 prom_debug("prom_opal_hold_cpus: end...\n"); 1410 } 1411 1412 static void __init prom_opal_takeover(void) 1413 { 1414 struct opal_secondary_data *data = &opal_secondary_data; 1415 struct opal_takeover_args *args = &data->args; 1416 u64 align = prom_opal_align; 1417 u64 top_addr, opal_addr; 1418 1419 args->k_image = (u64)_stext; 1420 args->k_size = _end - _stext; 1421 args->k_entry = 0; 1422 args->k_entry2 = 0x60; 1423 1424 top_addr = _ALIGN_UP(args->k_size, align); 1425 1426 if (prom_initrd_start != 0) { 1427 args->rd_image = prom_initrd_start; 1428 args->rd_size = prom_initrd_end - args->rd_image; 1429 args->rd_loc = top_addr; 1430 top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align); 1431 } 1432 1433 /* Pickup an address for the HAL. We want to go really high 1434 * up to avoid problem with future kexecs. On the other hand 1435 * we don't want to be all over the TCEs on P5IOC2 machines 1436 * which are going to be up there too. We assume the machine 1437 * has plenty of memory, and we ask for the HAL for now to 1438 * be just below the 1G point, or above the initrd 1439 */ 1440 opal_addr = _ALIGN_DOWN(0x40000000 - prom_opal_size, align); 1441 if (opal_addr < top_addr) 1442 opal_addr = top_addr; 1443 args->hal_addr = opal_addr; 1444 1445 /* Copy the command line to the kernel image */ 1446 strlcpy(boot_command_line, prom_cmd_line, 1447 COMMAND_LINE_SIZE); 1448 1449 prom_debug(" k_image = 0x%lx\n", args->k_image); 1450 prom_debug(" k_size = 0x%lx\n", args->k_size); 1451 prom_debug(" k_entry = 0x%lx\n", args->k_entry); 1452 prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2); 1453 prom_debug(" hal_addr = 0x%lx\n", args->hal_addr); 1454 prom_debug(" rd_image = 0x%lx\n", args->rd_image); 1455 prom_debug(" rd_size = 0x%lx\n", args->rd_size); 1456 prom_debug(" rd_loc = 0x%lx\n", args->rd_loc); 1457 prom_printf("Performing OPAL takeover,this can take a few minutes..\n"); 1458 prom_close_stdin(); 1459 mb(); 1460 data->go = 1; 1461 for (;;) 1462 opal_do_takeover(args); 1463 } 1464 #endif /* __BIG_ENDIAN__ */ 1465 1466 /* 1467 * Allocate room for and instantiate OPAL 1468 */ 1469 static void __init prom_instantiate_opal(void) 1470 { 1471 phandle opal_node; 1472 ihandle opal_inst; 1473 u64 base, entry; 1474 u64 size = 0, align = 0x10000; 1475 __be64 val64; 1476 u32 rets[2]; 1477 1478 prom_debug("prom_instantiate_opal: start...\n"); 1479 1480 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal")); 1481 prom_debug("opal_node: %x\n", opal_node); 1482 if (!PHANDLE_VALID(opal_node)) 1483 return; 1484 1485 val64 = 0; 1486 prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64)); 1487 size = be64_to_cpu(val64); 1488 if (size == 0) 1489 return; 1490 val64 = 0; 1491 prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64)); 1492 align = be64_to_cpu(val64); 1493 1494 base = alloc_down(size, align, 0); 1495 if (base == 0) { 1496 prom_printf("OPAL allocation failed !\n"); 1497 return; 1498 } 1499 1500 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal")); 1501 if (!IHANDLE_VALID(opal_inst)) { 1502 prom_printf("opening opal package failed (%x)\n", opal_inst); 1503 return; 1504 } 1505 1506 prom_printf("instantiating opal at 0x%x...", base); 1507 1508 if (call_prom_ret("call-method", 4, 3, rets, 1509 ADDR("load-opal-runtime"), 1510 opal_inst, 1511 base >> 32, base & 0xffffffff) != 0 1512 || (rets[0] == 0 && rets[1] == 0)) { 1513 prom_printf(" failed\n"); 1514 return; 1515 } 1516 entry = (((u64)rets[0]) << 32) | rets[1]; 1517 1518 prom_printf(" done\n"); 1519 1520 reserve_mem(base, size); 1521 1522 prom_debug("opal base = 0x%x\n", base); 1523 prom_debug("opal align = 0x%x\n", align); 1524 prom_debug("opal entry = 0x%x\n", entry); 1525 prom_debug("opal size = 0x%x\n", (long)size); 1526 1527 prom_setprop(opal_node, "/ibm,opal", "opal-base-address", 1528 &base, sizeof(base)); 1529 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address", 1530 &entry, sizeof(entry)); 1531 1532 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL 1533 prom_opal_base = base; 1534 prom_opal_entry = entry; 1535 #endif 1536 prom_debug("prom_instantiate_opal: end...\n"); 1537 } 1538 1539 #endif /* CONFIG_PPC_POWERNV */ 1540 1541 /* 1542 * Allocate room for and instantiate RTAS 1543 */ 1544 static void __init prom_instantiate_rtas(void) 1545 { 1546 phandle rtas_node; 1547 ihandle rtas_inst; 1548 u32 base, entry = 0; 1549 __be32 val; 1550 u32 size = 0; 1551 1552 prom_debug("prom_instantiate_rtas: start...\n"); 1553 1554 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); 1555 prom_debug("rtas_node: %x\n", rtas_node); 1556 if (!PHANDLE_VALID(rtas_node)) 1557 return; 1558 1559 val = 0; 1560 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size)); 1561 size = be32_to_cpu(val); 1562 if (size == 0) 1563 return; 1564 1565 base = alloc_down(size, PAGE_SIZE, 0); 1566 if (base == 0) 1567 prom_panic("Could not allocate memory for RTAS\n"); 1568 1569 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); 1570 if (!IHANDLE_VALID(rtas_inst)) { 1571 prom_printf("opening rtas package failed (%x)\n", rtas_inst); 1572 return; 1573 } 1574 1575 prom_printf("instantiating rtas at 0x%x...", base); 1576 1577 if (call_prom_ret("call-method", 3, 2, &entry, 1578 ADDR("instantiate-rtas"), 1579 rtas_inst, base) != 0 1580 || entry == 0) { 1581 prom_printf(" failed\n"); 1582 return; 1583 } 1584 prom_printf(" done\n"); 1585 1586 reserve_mem(base, size); 1587 1588 val = cpu_to_be32(base); 1589 prom_setprop(rtas_node, "/rtas", "linux,rtas-base", 1590 &val, sizeof(val)); 1591 val = cpu_to_be32(entry); 1592 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", 1593 &val, sizeof(val)); 1594 1595 /* Check if it supports "query-cpu-stopped-state" */ 1596 if (prom_getprop(rtas_node, "query-cpu-stopped-state", 1597 &val, sizeof(val)) != PROM_ERROR) 1598 rtas_has_query_cpu_stopped = true; 1599 1600 #if defined(CONFIG_PPC_POWERNV) && defined(__BIG_ENDIAN__) 1601 /* PowerVN takeover hack */ 1602 prom_rtas_data = base; 1603 prom_rtas_entry = entry; 1604 prom_getprop(rtas_node, "start-cpu", &prom_rtas_start_cpu, 4); 1605 #endif 1606 prom_debug("rtas base = 0x%x\n", base); 1607 prom_debug("rtas entry = 0x%x\n", entry); 1608 prom_debug("rtas size = 0x%x\n", (long)size); 1609 1610 prom_debug("prom_instantiate_rtas: end...\n"); 1611 } 1612 1613 #ifdef CONFIG_PPC64 1614 /* 1615 * Allocate room for and instantiate Stored Measurement Log (SML) 1616 */ 1617 static void __init prom_instantiate_sml(void) 1618 { 1619 phandle ibmvtpm_node; 1620 ihandle ibmvtpm_inst; 1621 u32 entry = 0, size = 0; 1622 u64 base; 1623 1624 prom_debug("prom_instantiate_sml: start...\n"); 1625 1626 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm")); 1627 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node); 1628 if (!PHANDLE_VALID(ibmvtpm_node)) 1629 return; 1630 1631 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm")); 1632 if (!IHANDLE_VALID(ibmvtpm_inst)) { 1633 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst); 1634 return; 1635 } 1636 1637 if (call_prom_ret("call-method", 2, 2, &size, 1638 ADDR("sml-get-handover-size"), 1639 ibmvtpm_inst) != 0 || size == 0) { 1640 prom_printf("SML get handover size failed\n"); 1641 return; 1642 } 1643 1644 base = alloc_down(size, PAGE_SIZE, 0); 1645 if (base == 0) 1646 prom_panic("Could not allocate memory for sml\n"); 1647 1648 prom_printf("instantiating sml at 0x%x...", base); 1649 1650 if (call_prom_ret("call-method", 4, 2, &entry, 1651 ADDR("sml-handover"), 1652 ibmvtpm_inst, size, base) != 0 || entry == 0) { 1653 prom_printf("SML handover failed\n"); 1654 return; 1655 } 1656 prom_printf(" done\n"); 1657 1658 reserve_mem(base, size); 1659 1660 prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base", 1661 &base, sizeof(base)); 1662 prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size", 1663 &size, sizeof(size)); 1664 1665 prom_debug("sml base = 0x%x\n", base); 1666 prom_debug("sml size = 0x%x\n", (long)size); 1667 1668 prom_debug("prom_instantiate_sml: end...\n"); 1669 } 1670 1671 /* 1672 * Allocate room for and initialize TCE tables 1673 */ 1674 #ifdef __BIG_ENDIAN__ 1675 static void __init prom_initialize_tce_table(void) 1676 { 1677 phandle node; 1678 ihandle phb_node; 1679 char compatible[64], type[64], model[64]; 1680 char *path = prom_scratch; 1681 u64 base, align; 1682 u32 minalign, minsize; 1683 u64 tce_entry, *tce_entryp; 1684 u64 local_alloc_top, local_alloc_bottom; 1685 u64 i; 1686 1687 if (prom_iommu_off) 1688 return; 1689 1690 prom_debug("starting prom_initialize_tce_table\n"); 1691 1692 /* Cache current top of allocs so we reserve a single block */ 1693 local_alloc_top = alloc_top_high; 1694 local_alloc_bottom = local_alloc_top; 1695 1696 /* Search all nodes looking for PHBs. */ 1697 for (node = 0; prom_next_node(&node); ) { 1698 compatible[0] = 0; 1699 type[0] = 0; 1700 model[0] = 0; 1701 prom_getprop(node, "compatible", 1702 compatible, sizeof(compatible)); 1703 prom_getprop(node, "device_type", type, sizeof(type)); 1704 prom_getprop(node, "model", model, sizeof(model)); 1705 1706 if ((type[0] == 0) || (strstr(type, "pci") == NULL)) 1707 continue; 1708 1709 /* Keep the old logic intact to avoid regression. */ 1710 if (compatible[0] != 0) { 1711 if ((strstr(compatible, "python") == NULL) && 1712 (strstr(compatible, "Speedwagon") == NULL) && 1713 (strstr(compatible, "Winnipeg") == NULL)) 1714 continue; 1715 } else if (model[0] != 0) { 1716 if ((strstr(model, "ython") == NULL) && 1717 (strstr(model, "peedwagon") == NULL) && 1718 (strstr(model, "innipeg") == NULL)) 1719 continue; 1720 } 1721 1722 if (prom_getprop(node, "tce-table-minalign", &minalign, 1723 sizeof(minalign)) == PROM_ERROR) 1724 minalign = 0; 1725 if (prom_getprop(node, "tce-table-minsize", &minsize, 1726 sizeof(minsize)) == PROM_ERROR) 1727 minsize = 4UL << 20; 1728 1729 /* 1730 * Even though we read what OF wants, we just set the table 1731 * size to 4 MB. This is enough to map 2GB of PCI DMA space. 1732 * By doing this, we avoid the pitfalls of trying to DMA to 1733 * MMIO space and the DMA alias hole. 1734 * 1735 * On POWER4, firmware sets the TCE region by assuming 1736 * each TCE table is 8MB. Using this memory for anything 1737 * else will impact performance, so we always allocate 8MB. 1738 * Anton 1739 */ 1740 if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p)) 1741 minsize = 8UL << 20; 1742 else 1743 minsize = 4UL << 20; 1744 1745 /* Align to the greater of the align or size */ 1746 align = max(minalign, minsize); 1747 base = alloc_down(minsize, align, 1); 1748 if (base == 0) 1749 prom_panic("ERROR, cannot find space for TCE table.\n"); 1750 if (base < local_alloc_bottom) 1751 local_alloc_bottom = base; 1752 1753 /* It seems OF doesn't null-terminate the path :-( */ 1754 memset(path, 0, PROM_SCRATCH_SIZE); 1755 /* Call OF to setup the TCE hardware */ 1756 if (call_prom("package-to-path", 3, 1, node, 1757 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { 1758 prom_printf("package-to-path failed\n"); 1759 } 1760 1761 /* Save away the TCE table attributes for later use. */ 1762 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); 1763 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); 1764 1765 prom_debug("TCE table: %s\n", path); 1766 prom_debug("\tnode = 0x%x\n", node); 1767 prom_debug("\tbase = 0x%x\n", base); 1768 prom_debug("\tsize = 0x%x\n", minsize); 1769 1770 /* Initialize the table to have a one-to-one mapping 1771 * over the allocated size. 1772 */ 1773 tce_entryp = (u64 *)base; 1774 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { 1775 tce_entry = (i << PAGE_SHIFT); 1776 tce_entry |= 0x3; 1777 *tce_entryp = tce_entry; 1778 } 1779 1780 prom_printf("opening PHB %s", path); 1781 phb_node = call_prom("open", 1, 1, path); 1782 if (phb_node == 0) 1783 prom_printf("... failed\n"); 1784 else 1785 prom_printf("... done\n"); 1786 1787 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), 1788 phb_node, -1, minsize, 1789 (u32) base, (u32) (base >> 32)); 1790 call_prom("close", 1, 0, phb_node); 1791 } 1792 1793 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); 1794 1795 /* These are only really needed if there is a memory limit in 1796 * effect, but we don't know so export them always. */ 1797 prom_tce_alloc_start = local_alloc_bottom; 1798 prom_tce_alloc_end = local_alloc_top; 1799 1800 /* Flag the first invalid entry */ 1801 prom_debug("ending prom_initialize_tce_table\n"); 1802 } 1803 #endif /* __BIG_ENDIAN__ */ 1804 #endif /* CONFIG_PPC64 */ 1805 1806 /* 1807 * With CHRP SMP we need to use the OF to start the other processors. 1808 * We can't wait until smp_boot_cpus (the OF is trashed by then) 1809 * so we have to put the processors into a holding pattern controlled 1810 * by the kernel (not OF) before we destroy the OF. 1811 * 1812 * This uses a chunk of low memory, puts some holding pattern 1813 * code there and sends the other processors off to there until 1814 * smp_boot_cpus tells them to do something. The holding pattern 1815 * checks that address until its cpu # is there, when it is that 1816 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care 1817 * of setting those values. 1818 * 1819 * We also use physical address 0x4 here to tell when a cpu 1820 * is in its holding pattern code. 1821 * 1822 * -- Cort 1823 */ 1824 /* 1825 * We want to reference the copy of __secondary_hold_* in the 1826 * 0 - 0x100 address range 1827 */ 1828 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) 1829 1830 static void __init prom_hold_cpus(void) 1831 { 1832 unsigned long i; 1833 phandle node; 1834 char type[64]; 1835 unsigned long *spinloop 1836 = (void *) LOW_ADDR(__secondary_hold_spinloop); 1837 unsigned long *acknowledge 1838 = (void *) LOW_ADDR(__secondary_hold_acknowledge); 1839 unsigned long secondary_hold = LOW_ADDR(__secondary_hold); 1840 1841 /* 1842 * On pseries, if RTAS supports "query-cpu-stopped-state", 1843 * we skip this stage, the CPUs will be started by the 1844 * kernel using RTAS. 1845 */ 1846 if ((of_platform == PLATFORM_PSERIES || 1847 of_platform == PLATFORM_PSERIES_LPAR) && 1848 rtas_has_query_cpu_stopped) { 1849 prom_printf("prom_hold_cpus: skipped\n"); 1850 return; 1851 } 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 unsigned int cpu_no; 1871 __be32 reg; 1872 1873 type[0] = 0; 1874 prom_getprop(node, "device_type", type, sizeof(type)); 1875 if (strcmp(type, "cpu") != 0) 1876 continue; 1877 1878 /* Skip non-configured cpus. */ 1879 if (prom_getprop(node, "status", type, sizeof(type)) > 0) 1880 if (strcmp(type, "okay") != 0) 1881 continue; 1882 1883 reg = cpu_to_be32(-1); /* make sparse happy */ 1884 prom_getprop(node, "reg", ®, sizeof(reg)); 1885 cpu_no = be32_to_cpu(reg); 1886 1887 prom_debug("cpu hw idx = %lu\n", cpu_no); 1888 1889 /* Init the acknowledge var which will be reset by 1890 * the secondary cpu when it awakens from its OF 1891 * spinloop. 1892 */ 1893 *acknowledge = (unsigned long)-1; 1894 1895 if (cpu_no != prom.cpu) { 1896 /* Primary Thread of non-boot cpu or any thread */ 1897 prom_printf("starting cpu hw idx %lu... ", cpu_no); 1898 call_prom("start-cpu", 3, 0, node, 1899 secondary_hold, cpu_no); 1900 1901 for (i = 0; (i < 100000000) && 1902 (*acknowledge == ((unsigned long)-1)); i++ ) 1903 mb(); 1904 1905 if (*acknowledge == cpu_no) 1906 prom_printf("done\n"); 1907 else 1908 prom_printf("failed: %x\n", *acknowledge); 1909 } 1910 #ifdef CONFIG_SMP 1911 else 1912 prom_printf("boot cpu hw idx %lu\n", cpu_no); 1913 #endif /* CONFIG_SMP */ 1914 } 1915 1916 prom_debug("prom_hold_cpus: end...\n"); 1917 } 1918 1919 1920 static void __init prom_init_client_services(unsigned long pp) 1921 { 1922 /* Get a handle to the prom entry point before anything else */ 1923 prom_entry = pp; 1924 1925 /* get a handle for the stdout device */ 1926 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); 1927 if (!PHANDLE_VALID(prom.chosen)) 1928 prom_panic("cannot find chosen"); /* msg won't be printed :( */ 1929 1930 /* get device tree root */ 1931 prom.root = call_prom("finddevice", 1, 1, ADDR("/")); 1932 if (!PHANDLE_VALID(prom.root)) 1933 prom_panic("cannot find device tree root"); /* msg won't be printed :( */ 1934 1935 prom.mmumap = 0; 1936 } 1937 1938 #ifdef CONFIG_PPC32 1939 /* 1940 * For really old powermacs, we need to map things we claim. 1941 * For that, we need the ihandle of the mmu. 1942 * Also, on the longtrail, we need to work around other bugs. 1943 */ 1944 static void __init prom_find_mmu(void) 1945 { 1946 phandle oprom; 1947 char version[64]; 1948 1949 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); 1950 if (!PHANDLE_VALID(oprom)) 1951 return; 1952 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) 1953 return; 1954 version[sizeof(version) - 1] = 0; 1955 /* XXX might need to add other versions here */ 1956 if (strcmp(version, "Open Firmware, 1.0.5") == 0) 1957 of_workarounds = OF_WA_CLAIM; 1958 else if (strncmp(version, "FirmWorks,3.", 12) == 0) { 1959 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; 1960 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); 1961 } else 1962 return; 1963 prom.memory = call_prom("open", 1, 1, ADDR("/memory")); 1964 prom_getprop(prom.chosen, "mmu", &prom.mmumap, 1965 sizeof(prom.mmumap)); 1966 prom.mmumap = be32_to_cpu(prom.mmumap); 1967 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap)) 1968 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ 1969 } 1970 #else 1971 #define prom_find_mmu() 1972 #endif 1973 1974 static void __init prom_init_stdout(void) 1975 { 1976 char *path = of_stdout_device; 1977 char type[16]; 1978 phandle stdout_node; 1979 __be32 val; 1980 1981 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0) 1982 prom_panic("cannot find stdout"); 1983 1984 prom.stdout = be32_to_cpu(val); 1985 1986 /* Get the full OF pathname of the stdout device */ 1987 memset(path, 0, 256); 1988 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255); 1989 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout); 1990 val = cpu_to_be32(stdout_node); 1991 prom_setprop(prom.chosen, "/chosen", "linux,stdout-package", 1992 &val, sizeof(val)); 1993 prom_printf("OF stdout device is: %s\n", of_stdout_device); 1994 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path", 1995 path, strlen(path) + 1); 1996 1997 /* If it's a display, note it */ 1998 memset(type, 0, sizeof(type)); 1999 prom_getprop(stdout_node, "device_type", type, sizeof(type)); 2000 if (strcmp(type, "display") == 0) 2001 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0); 2002 } 2003 2004 static int __init prom_find_machine_type(void) 2005 { 2006 char compat[256]; 2007 int len, i = 0; 2008 #ifdef CONFIG_PPC64 2009 phandle rtas; 2010 int x; 2011 #endif 2012 2013 /* Look for a PowerMac or a Cell */ 2014 len = prom_getprop(prom.root, "compatible", 2015 compat, sizeof(compat)-1); 2016 if (len > 0) { 2017 compat[len] = 0; 2018 while (i < len) { 2019 char *p = &compat[i]; 2020 int sl = strlen(p); 2021 if (sl == 0) 2022 break; 2023 if (strstr(p, "Power Macintosh") || 2024 strstr(p, "MacRISC")) 2025 return PLATFORM_POWERMAC; 2026 #ifdef CONFIG_PPC64 2027 /* We must make sure we don't detect the IBM Cell 2028 * blades as pSeries due to some firmware issues, 2029 * so we do it here. 2030 */ 2031 if (strstr(p, "IBM,CBEA") || 2032 strstr(p, "IBM,CPBW-1.0")) 2033 return PLATFORM_GENERIC; 2034 #endif /* CONFIG_PPC64 */ 2035 i += sl + 1; 2036 } 2037 } 2038 #ifdef CONFIG_PPC64 2039 /* Try to detect OPAL */ 2040 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal")))) 2041 return PLATFORM_OPAL; 2042 2043 /* Try to figure out if it's an IBM pSeries or any other 2044 * PAPR compliant platform. We assume it is if : 2045 * - /device_type is "chrp" (please, do NOT use that for future 2046 * non-IBM designs ! 2047 * - it has /rtas 2048 */ 2049 len = prom_getprop(prom.root, "device_type", 2050 compat, sizeof(compat)-1); 2051 if (len <= 0) 2052 return PLATFORM_GENERIC; 2053 if (strcmp(compat, "chrp")) 2054 return PLATFORM_GENERIC; 2055 2056 /* Default to pSeries. We need to know if we are running LPAR */ 2057 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); 2058 if (!PHANDLE_VALID(rtas)) 2059 return PLATFORM_GENERIC; 2060 x = prom_getproplen(rtas, "ibm,hypertas-functions"); 2061 if (x != PROM_ERROR) { 2062 prom_debug("Hypertas detected, assuming LPAR !\n"); 2063 return PLATFORM_PSERIES_LPAR; 2064 } 2065 return PLATFORM_PSERIES; 2066 #else 2067 return PLATFORM_GENERIC; 2068 #endif 2069 } 2070 2071 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) 2072 { 2073 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); 2074 } 2075 2076 /* 2077 * If we have a display that we don't know how to drive, 2078 * we will want to try to execute OF's open method for it 2079 * later. However, OF will probably fall over if we do that 2080 * we've taken over the MMU. 2081 * So we check whether we will need to open the display, 2082 * and if so, open it now. 2083 */ 2084 static void __init prom_check_displays(void) 2085 { 2086 char type[16], *path; 2087 phandle node; 2088 ihandle ih; 2089 int i; 2090 2091 static unsigned char default_colors[] = { 2092 0x00, 0x00, 0x00, 2093 0x00, 0x00, 0xaa, 2094 0x00, 0xaa, 0x00, 2095 0x00, 0xaa, 0xaa, 2096 0xaa, 0x00, 0x00, 2097 0xaa, 0x00, 0xaa, 2098 0xaa, 0xaa, 0x00, 2099 0xaa, 0xaa, 0xaa, 2100 0x55, 0x55, 0x55, 2101 0x55, 0x55, 0xff, 2102 0x55, 0xff, 0x55, 2103 0x55, 0xff, 0xff, 2104 0xff, 0x55, 0x55, 2105 0xff, 0x55, 0xff, 2106 0xff, 0xff, 0x55, 2107 0xff, 0xff, 0xff 2108 }; 2109 const unsigned char *clut; 2110 2111 prom_debug("Looking for displays\n"); 2112 for (node = 0; prom_next_node(&node); ) { 2113 memset(type, 0, sizeof(type)); 2114 prom_getprop(node, "device_type", type, sizeof(type)); 2115 if (strcmp(type, "display") != 0) 2116 continue; 2117 2118 /* It seems OF doesn't null-terminate the path :-( */ 2119 path = prom_scratch; 2120 memset(path, 0, PROM_SCRATCH_SIZE); 2121 2122 /* 2123 * leave some room at the end of the path for appending extra 2124 * arguments 2125 */ 2126 if (call_prom("package-to-path", 3, 1, node, path, 2127 PROM_SCRATCH_SIZE-10) == PROM_ERROR) 2128 continue; 2129 prom_printf("found display : %s, opening... ", path); 2130 2131 ih = call_prom("open", 1, 1, path); 2132 if (ih == 0) { 2133 prom_printf("failed\n"); 2134 continue; 2135 } 2136 2137 /* Success */ 2138 prom_printf("done\n"); 2139 prom_setprop(node, path, "linux,opened", NULL, 0); 2140 2141 /* Setup a usable color table when the appropriate 2142 * method is available. Should update this to set-colors */ 2143 clut = default_colors; 2144 for (i = 0; i < 16; i++, clut += 3) 2145 if (prom_set_color(ih, i, clut[0], clut[1], 2146 clut[2]) != 0) 2147 break; 2148 2149 #ifdef CONFIG_LOGO_LINUX_CLUT224 2150 clut = PTRRELOC(logo_linux_clut224.clut); 2151 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3) 2152 if (prom_set_color(ih, i + 32, clut[0], clut[1], 2153 clut[2]) != 0) 2154 break; 2155 #endif /* CONFIG_LOGO_LINUX_CLUT224 */ 2156 2157 #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX 2158 if (prom_getprop(node, "linux,boot-display", NULL, 0) != 2159 PROM_ERROR) { 2160 u32 width, height, pitch, addr; 2161 2162 prom_printf("Setting btext !\n"); 2163 prom_getprop(node, "width", &width, 4); 2164 prom_getprop(node, "height", &height, 4); 2165 prom_getprop(node, "linebytes", &pitch, 4); 2166 prom_getprop(node, "address", &addr, 4); 2167 prom_printf("W=%d H=%d LB=%d addr=0x%x\n", 2168 width, height, pitch, addr); 2169 btext_setup_display(width, height, 8, pitch, addr); 2170 } 2171 #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */ 2172 } 2173 } 2174 2175 2176 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ 2177 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, 2178 unsigned long needed, unsigned long align) 2179 { 2180 void *ret; 2181 2182 *mem_start = _ALIGN(*mem_start, align); 2183 while ((*mem_start + needed) > *mem_end) { 2184 unsigned long room, chunk; 2185 2186 prom_debug("Chunk exhausted, claiming more at %x...\n", 2187 alloc_bottom); 2188 room = alloc_top - alloc_bottom; 2189 if (room > DEVTREE_CHUNK_SIZE) 2190 room = DEVTREE_CHUNK_SIZE; 2191 if (room < PAGE_SIZE) 2192 prom_panic("No memory for flatten_device_tree " 2193 "(no room)\n"); 2194 chunk = alloc_up(room, 0); 2195 if (chunk == 0) 2196 prom_panic("No memory for flatten_device_tree " 2197 "(claim failed)\n"); 2198 *mem_end = chunk + room; 2199 } 2200 2201 ret = (void *)*mem_start; 2202 *mem_start += needed; 2203 2204 return ret; 2205 } 2206 2207 #define dt_push_token(token, mem_start, mem_end) do { \ 2208 void *room = make_room(mem_start, mem_end, 4, 4); \ 2209 *(__be32 *)room = cpu_to_be32(token); \ 2210 } while(0) 2211 2212 static unsigned long __init dt_find_string(char *str) 2213 { 2214 char *s, *os; 2215 2216 s = os = (char *)dt_string_start; 2217 s += 4; 2218 while (s < (char *)dt_string_end) { 2219 if (strcmp(s, str) == 0) 2220 return s - os; 2221 s += strlen(s) + 1; 2222 } 2223 return 0; 2224 } 2225 2226 /* 2227 * The Open Firmware 1275 specification states properties must be 31 bytes or 2228 * less, however not all firmwares obey this. Make it 64 bytes to be safe. 2229 */ 2230 #define MAX_PROPERTY_NAME 64 2231 2232 static void __init scan_dt_build_strings(phandle node, 2233 unsigned long *mem_start, 2234 unsigned long *mem_end) 2235 { 2236 char *prev_name, *namep, *sstart; 2237 unsigned long soff; 2238 phandle child; 2239 2240 sstart = (char *)dt_string_start; 2241 2242 /* get and store all property names */ 2243 prev_name = ""; 2244 for (;;) { 2245 /* 64 is max len of name including nul. */ 2246 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); 2247 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { 2248 /* No more nodes: unwind alloc */ 2249 *mem_start = (unsigned long)namep; 2250 break; 2251 } 2252 2253 /* skip "name" */ 2254 if (strcmp(namep, "name") == 0) { 2255 *mem_start = (unsigned long)namep; 2256 prev_name = "name"; 2257 continue; 2258 } 2259 /* get/create string entry */ 2260 soff = dt_find_string(namep); 2261 if (soff != 0) { 2262 *mem_start = (unsigned long)namep; 2263 namep = sstart + soff; 2264 } else { 2265 /* Trim off some if we can */ 2266 *mem_start = (unsigned long)namep + strlen(namep) + 1; 2267 dt_string_end = *mem_start; 2268 } 2269 prev_name = namep; 2270 } 2271 2272 /* do all our children */ 2273 child = call_prom("child", 1, 1, node); 2274 while (child != 0) { 2275 scan_dt_build_strings(child, mem_start, mem_end); 2276 child = call_prom("peer", 1, 1, child); 2277 } 2278 } 2279 2280 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, 2281 unsigned long *mem_end) 2282 { 2283 phandle child; 2284 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; 2285 unsigned long soff; 2286 unsigned char *valp; 2287 static char pname[MAX_PROPERTY_NAME]; 2288 int l, room, has_phandle = 0; 2289 2290 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); 2291 2292 /* get the node's full name */ 2293 namep = (char *)*mem_start; 2294 room = *mem_end - *mem_start; 2295 if (room > 255) 2296 room = 255; 2297 l = call_prom("package-to-path", 3, 1, node, namep, room); 2298 if (l >= 0) { 2299 /* Didn't fit? Get more room. */ 2300 if (l >= room) { 2301 if (l >= *mem_end - *mem_start) 2302 namep = make_room(mem_start, mem_end, l+1, 1); 2303 call_prom("package-to-path", 3, 1, node, namep, l); 2304 } 2305 namep[l] = '\0'; 2306 2307 /* Fixup an Apple bug where they have bogus \0 chars in the 2308 * middle of the path in some properties, and extract 2309 * the unit name (everything after the last '/'). 2310 */ 2311 for (lp = p = namep, ep = namep + l; p < ep; p++) { 2312 if (*p == '/') 2313 lp = namep; 2314 else if (*p != 0) 2315 *lp++ = *p; 2316 } 2317 *lp = 0; 2318 *mem_start = _ALIGN((unsigned long)lp + 1, 4); 2319 } 2320 2321 /* get it again for debugging */ 2322 path = prom_scratch; 2323 memset(path, 0, PROM_SCRATCH_SIZE); 2324 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 2325 2326 /* get and store all properties */ 2327 prev_name = ""; 2328 sstart = (char *)dt_string_start; 2329 for (;;) { 2330 if (call_prom("nextprop", 3, 1, node, prev_name, 2331 pname) != 1) 2332 break; 2333 2334 /* skip "name" */ 2335 if (strcmp(pname, "name") == 0) { 2336 prev_name = "name"; 2337 continue; 2338 } 2339 2340 /* find string offset */ 2341 soff = dt_find_string(pname); 2342 if (soff == 0) { 2343 prom_printf("WARNING: Can't find string index for" 2344 " <%s>, node %s\n", pname, path); 2345 break; 2346 } 2347 prev_name = sstart + soff; 2348 2349 /* get length */ 2350 l = call_prom("getproplen", 2, 1, node, pname); 2351 2352 /* sanity checks */ 2353 if (l == PROM_ERROR) 2354 continue; 2355 2356 /* push property head */ 2357 dt_push_token(OF_DT_PROP, mem_start, mem_end); 2358 dt_push_token(l, mem_start, mem_end); 2359 dt_push_token(soff, mem_start, mem_end); 2360 2361 /* push property content */ 2362 valp = make_room(mem_start, mem_end, l, 4); 2363 call_prom("getprop", 4, 1, node, pname, valp, l); 2364 *mem_start = _ALIGN(*mem_start, 4); 2365 2366 if (!strcmp(pname, "phandle")) 2367 has_phandle = 1; 2368 } 2369 2370 /* Add a "linux,phandle" property if no "phandle" property already 2371 * existed (can happen with OPAL) 2372 */ 2373 if (!has_phandle) { 2374 soff = dt_find_string("linux,phandle"); 2375 if (soff == 0) 2376 prom_printf("WARNING: Can't find string index for" 2377 " <linux-phandle> node %s\n", path); 2378 else { 2379 dt_push_token(OF_DT_PROP, mem_start, mem_end); 2380 dt_push_token(4, mem_start, mem_end); 2381 dt_push_token(soff, mem_start, mem_end); 2382 valp = make_room(mem_start, mem_end, 4, 4); 2383 *(__be32 *)valp = cpu_to_be32(node); 2384 } 2385 } 2386 2387 /* do all our children */ 2388 child = call_prom("child", 1, 1, node); 2389 while (child != 0) { 2390 scan_dt_build_struct(child, mem_start, mem_end); 2391 child = call_prom("peer", 1, 1, child); 2392 } 2393 2394 dt_push_token(OF_DT_END_NODE, mem_start, mem_end); 2395 } 2396 2397 static void __init flatten_device_tree(void) 2398 { 2399 phandle root; 2400 unsigned long mem_start, mem_end, room; 2401 struct boot_param_header *hdr; 2402 char *namep; 2403 u64 *rsvmap; 2404 2405 /* 2406 * Check how much room we have between alloc top & bottom (+/- a 2407 * few pages), crop to 1MB, as this is our "chunk" size 2408 */ 2409 room = alloc_top - alloc_bottom - 0x4000; 2410 if (room > DEVTREE_CHUNK_SIZE) 2411 room = DEVTREE_CHUNK_SIZE; 2412 prom_debug("starting device tree allocs at %x\n", alloc_bottom); 2413 2414 /* Now try to claim that */ 2415 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); 2416 if (mem_start == 0) 2417 prom_panic("Can't allocate initial device-tree chunk\n"); 2418 mem_end = mem_start + room; 2419 2420 /* Get root of tree */ 2421 root = call_prom("peer", 1, 1, (phandle)0); 2422 if (root == (phandle)0) 2423 prom_panic ("couldn't get device tree root\n"); 2424 2425 /* Build header and make room for mem rsv map */ 2426 mem_start = _ALIGN(mem_start, 4); 2427 hdr = make_room(&mem_start, &mem_end, 2428 sizeof(struct boot_param_header), 4); 2429 dt_header_start = (unsigned long)hdr; 2430 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); 2431 2432 /* Start of strings */ 2433 mem_start = PAGE_ALIGN(mem_start); 2434 dt_string_start = mem_start; 2435 mem_start += 4; /* hole */ 2436 2437 /* Add "linux,phandle" in there, we'll need it */ 2438 namep = make_room(&mem_start, &mem_end, 16, 1); 2439 strcpy(namep, "linux,phandle"); 2440 mem_start = (unsigned long)namep + strlen(namep) + 1; 2441 2442 /* Build string array */ 2443 prom_printf("Building dt strings...\n"); 2444 scan_dt_build_strings(root, &mem_start, &mem_end); 2445 dt_string_end = mem_start; 2446 2447 /* Build structure */ 2448 mem_start = PAGE_ALIGN(mem_start); 2449 dt_struct_start = mem_start; 2450 prom_printf("Building dt structure...\n"); 2451 scan_dt_build_struct(root, &mem_start, &mem_end); 2452 dt_push_token(OF_DT_END, &mem_start, &mem_end); 2453 dt_struct_end = PAGE_ALIGN(mem_start); 2454 2455 /* Finish header */ 2456 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu); 2457 hdr->magic = cpu_to_be32(OF_DT_HEADER); 2458 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start); 2459 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start); 2460 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start); 2461 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start); 2462 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start); 2463 hdr->version = cpu_to_be32(OF_DT_VERSION); 2464 /* Version 16 is not backward compatible */ 2465 hdr->last_comp_version = cpu_to_be32(0x10); 2466 2467 /* Copy the reserve map in */ 2468 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map)); 2469 2470 #ifdef DEBUG_PROM 2471 { 2472 int i; 2473 prom_printf("reserved memory map:\n"); 2474 for (i = 0; i < mem_reserve_cnt; i++) 2475 prom_printf(" %x - %x\n", 2476 be64_to_cpu(mem_reserve_map[i].base), 2477 be64_to_cpu(mem_reserve_map[i].size)); 2478 } 2479 #endif 2480 /* Bump mem_reserve_cnt to cause further reservations to fail 2481 * since it's too late. 2482 */ 2483 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE; 2484 2485 prom_printf("Device tree strings 0x%x -> 0x%x\n", 2486 dt_string_start, dt_string_end); 2487 prom_printf("Device tree struct 0x%x -> 0x%x\n", 2488 dt_struct_start, dt_struct_end); 2489 } 2490 2491 #ifdef CONFIG_PPC_MAPLE 2492 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. 2493 * The values are bad, and it doesn't even have the right number of cells. */ 2494 static void __init fixup_device_tree_maple(void) 2495 { 2496 phandle isa; 2497 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ 2498 u32 isa_ranges[6]; 2499 char *name; 2500 2501 name = "/ht@0/isa@4"; 2502 isa = call_prom("finddevice", 1, 1, ADDR(name)); 2503 if (!PHANDLE_VALID(isa)) { 2504 name = "/ht@0/isa@6"; 2505 isa = call_prom("finddevice", 1, 1, ADDR(name)); 2506 rloc = 0x01003000; /* IO space; PCI device = 6 */ 2507 } 2508 if (!PHANDLE_VALID(isa)) 2509 return; 2510 2511 if (prom_getproplen(isa, "ranges") != 12) 2512 return; 2513 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) 2514 == PROM_ERROR) 2515 return; 2516 2517 if (isa_ranges[0] != 0x1 || 2518 isa_ranges[1] != 0xf4000000 || 2519 isa_ranges[2] != 0x00010000) 2520 return; 2521 2522 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); 2523 2524 isa_ranges[0] = 0x1; 2525 isa_ranges[1] = 0x0; 2526 isa_ranges[2] = rloc; 2527 isa_ranges[3] = 0x0; 2528 isa_ranges[4] = 0x0; 2529 isa_ranges[5] = 0x00010000; 2530 prom_setprop(isa, name, "ranges", 2531 isa_ranges, sizeof(isa_ranges)); 2532 } 2533 2534 #define CPC925_MC_START 0xf8000000 2535 #define CPC925_MC_LENGTH 0x1000000 2536 /* The values for memory-controller don't have right number of cells */ 2537 static void __init fixup_device_tree_maple_memory_controller(void) 2538 { 2539 phandle mc; 2540 u32 mc_reg[4]; 2541 char *name = "/hostbridge@f8000000"; 2542 u32 ac, sc; 2543 2544 mc = call_prom("finddevice", 1, 1, ADDR(name)); 2545 if (!PHANDLE_VALID(mc)) 2546 return; 2547 2548 if (prom_getproplen(mc, "reg") != 8) 2549 return; 2550 2551 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac)); 2552 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc)); 2553 if ((ac != 2) || (sc != 2)) 2554 return; 2555 2556 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) 2557 return; 2558 2559 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) 2560 return; 2561 2562 prom_printf("Fixing up bogus hostbridge on Maple...\n"); 2563 2564 mc_reg[0] = 0x0; 2565 mc_reg[1] = CPC925_MC_START; 2566 mc_reg[2] = 0x0; 2567 mc_reg[3] = CPC925_MC_LENGTH; 2568 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); 2569 } 2570 #else 2571 #define fixup_device_tree_maple() 2572 #define fixup_device_tree_maple_memory_controller() 2573 #endif 2574 2575 #ifdef CONFIG_PPC_CHRP 2576 /* 2577 * Pegasos and BriQ lacks the "ranges" property in the isa node 2578 * Pegasos needs decimal IRQ 14/15, not hexadecimal 2579 * Pegasos has the IDE configured in legacy mode, but advertised as native 2580 */ 2581 static void __init fixup_device_tree_chrp(void) 2582 { 2583 phandle ph; 2584 u32 prop[6]; 2585 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ 2586 char *name; 2587 int rc; 2588 2589 name = "/pci@80000000/isa@c"; 2590 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2591 if (!PHANDLE_VALID(ph)) { 2592 name = "/pci@ff500000/isa@6"; 2593 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2594 rloc = 0x01003000; /* IO space; PCI device = 6 */ 2595 } 2596 if (PHANDLE_VALID(ph)) { 2597 rc = prom_getproplen(ph, "ranges"); 2598 if (rc == 0 || rc == PROM_ERROR) { 2599 prom_printf("Fixing up missing ISA range on Pegasos...\n"); 2600 2601 prop[0] = 0x1; 2602 prop[1] = 0x0; 2603 prop[2] = rloc; 2604 prop[3] = 0x0; 2605 prop[4] = 0x0; 2606 prop[5] = 0x00010000; 2607 prom_setprop(ph, name, "ranges", prop, sizeof(prop)); 2608 } 2609 } 2610 2611 name = "/pci@80000000/ide@C,1"; 2612 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2613 if (PHANDLE_VALID(ph)) { 2614 prom_printf("Fixing up IDE interrupt on Pegasos...\n"); 2615 prop[0] = 14; 2616 prop[1] = 0x0; 2617 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); 2618 prom_printf("Fixing up IDE class-code on Pegasos...\n"); 2619 rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); 2620 if (rc == sizeof(u32)) { 2621 prop[0] &= ~0x5; 2622 prom_setprop(ph, name, "class-code", prop, sizeof(u32)); 2623 } 2624 } 2625 } 2626 #else 2627 #define fixup_device_tree_chrp() 2628 #endif 2629 2630 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) 2631 static void __init fixup_device_tree_pmac(void) 2632 { 2633 phandle u3, i2c, mpic; 2634 u32 u3_rev; 2635 u32 interrupts[2]; 2636 u32 parent; 2637 2638 /* Some G5s have a missing interrupt definition, fix it up here */ 2639 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); 2640 if (!PHANDLE_VALID(u3)) 2641 return; 2642 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); 2643 if (!PHANDLE_VALID(i2c)) 2644 return; 2645 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); 2646 if (!PHANDLE_VALID(mpic)) 2647 return; 2648 2649 /* check if proper rev of u3 */ 2650 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) 2651 == PROM_ERROR) 2652 return; 2653 if (u3_rev < 0x35 || u3_rev > 0x39) 2654 return; 2655 /* does it need fixup ? */ 2656 if (prom_getproplen(i2c, "interrupts") > 0) 2657 return; 2658 2659 prom_printf("fixing up bogus interrupts for u3 i2c...\n"); 2660 2661 /* interrupt on this revision of u3 is number 0 and level */ 2662 interrupts[0] = 0; 2663 interrupts[1] = 1; 2664 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", 2665 &interrupts, sizeof(interrupts)); 2666 parent = (u32)mpic; 2667 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", 2668 &parent, sizeof(parent)); 2669 } 2670 #else 2671 #define fixup_device_tree_pmac() 2672 #endif 2673 2674 #ifdef CONFIG_PPC_EFIKA 2675 /* 2676 * The MPC5200 FEC driver requires an phy-handle property to tell it how 2677 * to talk to the phy. If the phy-handle property is missing, then this 2678 * function is called to add the appropriate nodes and link it to the 2679 * ethernet node. 2680 */ 2681 static void __init fixup_device_tree_efika_add_phy(void) 2682 { 2683 u32 node; 2684 char prop[64]; 2685 int rv; 2686 2687 /* Check if /builtin/ethernet exists - bail if it doesn't */ 2688 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); 2689 if (!PHANDLE_VALID(node)) 2690 return; 2691 2692 /* Check if the phy-handle property exists - bail if it does */ 2693 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); 2694 if (!rv) 2695 return; 2696 2697 /* 2698 * At this point the ethernet device doesn't have a phy described. 2699 * Now we need to add the missing phy node and linkage 2700 */ 2701 2702 /* Check for an MDIO bus node - if missing then create one */ 2703 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); 2704 if (!PHANDLE_VALID(node)) { 2705 prom_printf("Adding Ethernet MDIO node\n"); 2706 call_prom("interpret", 1, 1, 2707 " s\" /builtin\" find-device" 2708 " new-device" 2709 " 1 encode-int s\" #address-cells\" property" 2710 " 0 encode-int s\" #size-cells\" property" 2711 " s\" mdio\" device-name" 2712 " s\" fsl,mpc5200b-mdio\" encode-string" 2713 " s\" compatible\" property" 2714 " 0xf0003000 0x400 reg" 2715 " 0x2 encode-int" 2716 " 0x5 encode-int encode+" 2717 " 0x3 encode-int encode+" 2718 " s\" interrupts\" property" 2719 " finish-device"); 2720 }; 2721 2722 /* Check for a PHY device node - if missing then create one and 2723 * give it's phandle to the ethernet node */ 2724 node = call_prom("finddevice", 1, 1, 2725 ADDR("/builtin/mdio/ethernet-phy")); 2726 if (!PHANDLE_VALID(node)) { 2727 prom_printf("Adding Ethernet PHY node\n"); 2728 call_prom("interpret", 1, 1, 2729 " s\" /builtin/mdio\" find-device" 2730 " new-device" 2731 " s\" ethernet-phy\" device-name" 2732 " 0x10 encode-int s\" reg\" property" 2733 " my-self" 2734 " ihandle>phandle" 2735 " finish-device" 2736 " s\" /builtin/ethernet\" find-device" 2737 " encode-int" 2738 " s\" phy-handle\" property" 2739 " device-end"); 2740 } 2741 } 2742 2743 static void __init fixup_device_tree_efika(void) 2744 { 2745 int sound_irq[3] = { 2, 2, 0 }; 2746 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, 2747 3,4,0, 3,5,0, 3,6,0, 3,7,0, 2748 3,8,0, 3,9,0, 3,10,0, 3,11,0, 2749 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; 2750 u32 node; 2751 char prop[64]; 2752 int rv, len; 2753 2754 /* Check if we're really running on a EFIKA */ 2755 node = call_prom("finddevice", 1, 1, ADDR("/")); 2756 if (!PHANDLE_VALID(node)) 2757 return; 2758 2759 rv = prom_getprop(node, "model", prop, sizeof(prop)); 2760 if (rv == PROM_ERROR) 2761 return; 2762 if (strcmp(prop, "EFIKA5K2")) 2763 return; 2764 2765 prom_printf("Applying EFIKA device tree fixups\n"); 2766 2767 /* Claiming to be 'chrp' is death */ 2768 node = call_prom("finddevice", 1, 1, ADDR("/")); 2769 rv = prom_getprop(node, "device_type", prop, sizeof(prop)); 2770 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) 2771 prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); 2772 2773 /* CODEGEN,description is exposed in /proc/cpuinfo so 2774 fix that too */ 2775 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); 2776 if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) 2777 prom_setprop(node, "/", "CODEGEN,description", 2778 "Efika 5200B PowerPC System", 2779 sizeof("Efika 5200B PowerPC System")); 2780 2781 /* Fixup bestcomm interrupts property */ 2782 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); 2783 if (PHANDLE_VALID(node)) { 2784 len = prom_getproplen(node, "interrupts"); 2785 if (len == 12) { 2786 prom_printf("Fixing bestcomm interrupts property\n"); 2787 prom_setprop(node, "/builtin/bestcom", "interrupts", 2788 bcomm_irq, sizeof(bcomm_irq)); 2789 } 2790 } 2791 2792 /* Fixup sound interrupts property */ 2793 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); 2794 if (PHANDLE_VALID(node)) { 2795 rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); 2796 if (rv == PROM_ERROR) { 2797 prom_printf("Adding sound interrupts property\n"); 2798 prom_setprop(node, "/builtin/sound", "interrupts", 2799 sound_irq, sizeof(sound_irq)); 2800 } 2801 } 2802 2803 /* Make sure ethernet phy-handle property exists */ 2804 fixup_device_tree_efika_add_phy(); 2805 } 2806 #else 2807 #define fixup_device_tree_efika() 2808 #endif 2809 2810 static void __init fixup_device_tree(void) 2811 { 2812 fixup_device_tree_maple(); 2813 fixup_device_tree_maple_memory_controller(); 2814 fixup_device_tree_chrp(); 2815 fixup_device_tree_pmac(); 2816 fixup_device_tree_efika(); 2817 } 2818 2819 static void __init prom_find_boot_cpu(void) 2820 { 2821 __be32 rval; 2822 ihandle prom_cpu; 2823 phandle cpu_pkg; 2824 2825 rval = 0; 2826 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0) 2827 return; 2828 prom_cpu = be32_to_cpu(rval); 2829 2830 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); 2831 2832 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval)); 2833 prom.cpu = be32_to_cpu(rval); 2834 2835 prom_debug("Booting CPU hw index = %lu\n", prom.cpu); 2836 } 2837 2838 static void __init prom_check_initrd(unsigned long r3, unsigned long r4) 2839 { 2840 #ifdef CONFIG_BLK_DEV_INITRD 2841 if (r3 && r4 && r4 != 0xdeadbeef) { 2842 __be64 val; 2843 2844 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3; 2845 prom_initrd_end = prom_initrd_start + r4; 2846 2847 val = cpu_to_be64(prom_initrd_start); 2848 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start", 2849 &val, sizeof(val)); 2850 val = cpu_to_be64(prom_initrd_end); 2851 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end", 2852 &val, sizeof(val)); 2853 2854 reserve_mem(prom_initrd_start, 2855 prom_initrd_end - prom_initrd_start); 2856 2857 prom_debug("initrd_start=0x%x\n", prom_initrd_start); 2858 prom_debug("initrd_end=0x%x\n", prom_initrd_end); 2859 } 2860 #endif /* CONFIG_BLK_DEV_INITRD */ 2861 } 2862 2863 #ifdef CONFIG_PPC64 2864 #ifdef CONFIG_RELOCATABLE 2865 static void reloc_toc(void) 2866 { 2867 } 2868 2869 static void unreloc_toc(void) 2870 { 2871 } 2872 #else 2873 static void __reloc_toc(unsigned long offset, unsigned long nr_entries) 2874 { 2875 unsigned long i; 2876 unsigned long *toc_entry; 2877 2878 /* Get the start of the TOC by using r2 directly. */ 2879 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry)); 2880 2881 for (i = 0; i < nr_entries; i++) { 2882 *toc_entry = *toc_entry + offset; 2883 toc_entry++; 2884 } 2885 } 2886 2887 static void reloc_toc(void) 2888 { 2889 unsigned long offset = reloc_offset(); 2890 unsigned long nr_entries = 2891 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long); 2892 2893 __reloc_toc(offset, nr_entries); 2894 2895 mb(); 2896 } 2897 2898 static void unreloc_toc(void) 2899 { 2900 unsigned long offset = reloc_offset(); 2901 unsigned long nr_entries = 2902 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long); 2903 2904 mb(); 2905 2906 __reloc_toc(-offset, nr_entries); 2907 } 2908 #endif 2909 #endif 2910 2911 /* 2912 * We enter here early on, when the Open Firmware prom is still 2913 * handling exceptions and the MMU hash table for us. 2914 */ 2915 2916 unsigned long __init prom_init(unsigned long r3, unsigned long r4, 2917 unsigned long pp, 2918 unsigned long r6, unsigned long r7, 2919 unsigned long kbase) 2920 { 2921 unsigned long hdr; 2922 2923 #ifdef CONFIG_PPC32 2924 unsigned long offset = reloc_offset(); 2925 reloc_got2(offset); 2926 #else 2927 reloc_toc(); 2928 #endif 2929 2930 /* 2931 * First zero the BSS 2932 */ 2933 memset(&__bss_start, 0, __bss_stop - __bss_start); 2934 2935 /* 2936 * Init interface to Open Firmware, get some node references, 2937 * like /chosen 2938 */ 2939 prom_init_client_services(pp); 2940 2941 /* 2942 * See if this OF is old enough that we need to do explicit maps 2943 * and other workarounds 2944 */ 2945 prom_find_mmu(); 2946 2947 /* 2948 * Init prom stdout device 2949 */ 2950 prom_init_stdout(); 2951 2952 prom_printf("Preparing to boot %s", linux_banner); 2953 2954 /* 2955 * Get default machine type. At this point, we do not differentiate 2956 * between pSeries SMP and pSeries LPAR 2957 */ 2958 of_platform = prom_find_machine_type(); 2959 prom_printf("Detected machine type: %x\n", of_platform); 2960 2961 #ifndef CONFIG_NONSTATIC_KERNEL 2962 /* Bail if this is a kdump kernel. */ 2963 if (PHYSICAL_START > 0) 2964 prom_panic("Error: You can't boot a kdump kernel from OF!\n"); 2965 #endif 2966 2967 /* 2968 * Check for an initrd 2969 */ 2970 prom_check_initrd(r3, r4); 2971 2972 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) 2973 /* 2974 * On pSeries, inform the firmware about our capabilities 2975 */ 2976 if (of_platform == PLATFORM_PSERIES || 2977 of_platform == PLATFORM_PSERIES_LPAR) 2978 prom_send_capabilities(); 2979 #endif 2980 2981 /* 2982 * Copy the CPU hold code 2983 */ 2984 if (of_platform != PLATFORM_POWERMAC) 2985 copy_and_flush(0, kbase, 0x100, 0); 2986 2987 /* 2988 * Do early parsing of command line 2989 */ 2990 early_cmdline_parse(); 2991 2992 /* 2993 * Initialize memory management within prom_init 2994 */ 2995 prom_init_mem(); 2996 2997 /* 2998 * Determine which cpu is actually running right _now_ 2999 */ 3000 prom_find_boot_cpu(); 3001 3002 /* 3003 * Initialize display devices 3004 */ 3005 prom_check_displays(); 3006 3007 #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__) 3008 /* 3009 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else 3010 * that uses the allocator, we need to make sure we get the top of memory 3011 * available for us here... 3012 */ 3013 if (of_platform == PLATFORM_PSERIES) 3014 prom_initialize_tce_table(); 3015 #endif 3016 3017 /* 3018 * On non-powermacs, try to instantiate RTAS. PowerMacs don't 3019 * have a usable RTAS implementation. 3020 */ 3021 if (of_platform != PLATFORM_POWERMAC && 3022 of_platform != PLATFORM_OPAL) 3023 prom_instantiate_rtas(); 3024 3025 #ifdef CONFIG_PPC_POWERNV 3026 #ifdef __BIG_ENDIAN__ 3027 /* Detect HAL and try instanciating it & doing takeover */ 3028 if (of_platform == PLATFORM_PSERIES_LPAR) { 3029 prom_query_opal(); 3030 if (of_platform == PLATFORM_OPAL) { 3031 prom_opal_hold_cpus(); 3032 prom_opal_takeover(); 3033 } 3034 } else 3035 #endif /* __BIG_ENDIAN__ */ 3036 if (of_platform == PLATFORM_OPAL) 3037 prom_instantiate_opal(); 3038 #endif /* CONFIG_PPC_POWERNV */ 3039 3040 #ifdef CONFIG_PPC64 3041 /* instantiate sml */ 3042 prom_instantiate_sml(); 3043 #endif 3044 3045 /* 3046 * On non-powermacs, put all CPUs in spin-loops. 3047 * 3048 * PowerMacs use a different mechanism to spin CPUs 3049 * 3050 * (This must be done after instanciating RTAS) 3051 */ 3052 if (of_platform != PLATFORM_POWERMAC && 3053 of_platform != PLATFORM_OPAL) 3054 prom_hold_cpus(); 3055 3056 /* 3057 * Fill in some infos for use by the kernel later on 3058 */ 3059 if (prom_memory_limit) { 3060 __be64 val = cpu_to_be64(prom_memory_limit); 3061 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit", 3062 &val, sizeof(val)); 3063 } 3064 #ifdef CONFIG_PPC64 3065 if (prom_iommu_off) 3066 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off", 3067 NULL, 0); 3068 3069 if (prom_iommu_force_on) 3070 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on", 3071 NULL, 0); 3072 3073 if (prom_tce_alloc_start) { 3074 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start", 3075 &prom_tce_alloc_start, 3076 sizeof(prom_tce_alloc_start)); 3077 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end", 3078 &prom_tce_alloc_end, 3079 sizeof(prom_tce_alloc_end)); 3080 } 3081 #endif 3082 3083 /* 3084 * Fixup any known bugs in the device-tree 3085 */ 3086 fixup_device_tree(); 3087 3088 /* 3089 * Now finally create the flattened device-tree 3090 */ 3091 prom_printf("copying OF device tree...\n"); 3092 flatten_device_tree(); 3093 3094 /* 3095 * in case stdin is USB and still active on IBM machines... 3096 * Unfortunately quiesce crashes on some powermacs if we have 3097 * closed stdin already (in particular the powerbook 101). It 3098 * appears that the OPAL version of OFW doesn't like it either. 3099 */ 3100 if (of_platform != PLATFORM_POWERMAC && 3101 of_platform != PLATFORM_OPAL) 3102 prom_close_stdin(); 3103 3104 /* 3105 * Call OF "quiesce" method to shut down pending DMA's from 3106 * devices etc... 3107 */ 3108 prom_printf("Calling quiesce...\n"); 3109 call_prom("quiesce", 0, 0); 3110 3111 /* 3112 * And finally, call the kernel passing it the flattened device 3113 * tree and NULL as r5, thus triggering the new entry point which 3114 * is common to us and kexec 3115 */ 3116 hdr = dt_header_start; 3117 3118 /* Don't print anything after quiesce under OPAL, it crashes OFW */ 3119 if (of_platform != PLATFORM_OPAL) { 3120 prom_printf("returning from prom_init\n"); 3121 prom_debug("->dt_header_start=0x%x\n", hdr); 3122 } 3123 3124 #ifdef CONFIG_PPC32 3125 reloc_got2(-offset); 3126 #else 3127 unreloc_toc(); 3128 #endif 3129 3130 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL 3131 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */ 3132 __start(hdr, kbase, 0, 0, 0, 3133 prom_opal_base, prom_opal_entry); 3134 #else 3135 __start(hdr, kbase, 0, 0, 0, 0, 0); 3136 #endif 3137 3138 return 0; 3139 } 3140