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/system.h> 39 #include <asm/mmu.h> 40 #include <asm/pgtable.h> 41 #include <asm/pci.h> 42 #include <asm/iommu.h> 43 #include <asm/btext.h> 44 #include <asm/sections.h> 45 #include <asm/machdep.h> 46 47 #ifdef CONFIG_LOGO_LINUX_CLUT224 48 #include <linux/linux_logo.h> 49 extern const struct linux_logo logo_linux_clut224; 50 #endif 51 52 /* 53 * Properties whose value is longer than this get excluded from our 54 * copy of the device tree. This value does need to be big enough to 55 * ensure that we don't lose things like the interrupt-map property 56 * on a PCI-PCI bridge. 57 */ 58 #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) 59 60 /* 61 * Eventually bump that one up 62 */ 63 #define DEVTREE_CHUNK_SIZE 0x100000 64 65 /* 66 * This is the size of the local memory reserve map that gets copied 67 * into the boot params passed to the kernel. That size is totally 68 * flexible as the kernel just reads the list until it encounters an 69 * entry with size 0, so it can be changed without breaking binary 70 * compatibility 71 */ 72 #define MEM_RESERVE_MAP_SIZE 8 73 74 /* 75 * prom_init() is called very early on, before the kernel text 76 * and data have been mapped to KERNELBASE. At this point the code 77 * is running at whatever address it has been loaded at. 78 * On ppc32 we compile with -mrelocatable, which means that references 79 * to extern and static variables get relocated automatically. 80 * On ppc64 we have to relocate the references explicitly with 81 * RELOC. (Note that strings count as static variables.) 82 * 83 * Because OF may have mapped I/O devices into the area starting at 84 * KERNELBASE, particularly on CHRP machines, we can't safely call 85 * OF once the kernel has been mapped to KERNELBASE. Therefore all 86 * OF calls must be done within prom_init(). 87 * 88 * ADDR is used in calls to call_prom. The 4th and following 89 * arguments to call_prom should be 32-bit values. 90 * On ppc64, 64 bit values are truncated to 32 bits (and 91 * fortunately don't get interpreted as two arguments). 92 */ 93 #ifdef CONFIG_PPC64 94 #define RELOC(x) (*PTRRELOC(&(x))) 95 #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) 96 #define OF_WORKAROUNDS 0 97 #else 98 #define RELOC(x) (x) 99 #define ADDR(x) (u32) (x) 100 #define OF_WORKAROUNDS of_workarounds 101 int of_workarounds; 102 #endif 103 104 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ 105 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ 106 107 #define PROM_BUG() do { \ 108 prom_printf("kernel BUG at %s line 0x%x!\n", \ 109 RELOC(__FILE__), __LINE__); \ 110 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ 111 } while (0) 112 113 #ifdef DEBUG_PROM 114 #define prom_debug(x...) prom_printf(x) 115 #else 116 #define prom_debug(x...) 117 #endif 118 119 120 typedef u32 prom_arg_t; 121 122 struct prom_args { 123 u32 service; 124 u32 nargs; 125 u32 nret; 126 prom_arg_t args[10]; 127 }; 128 129 struct prom_t { 130 ihandle root; 131 phandle chosen; 132 int cpu; 133 ihandle stdout; 134 ihandle mmumap; 135 ihandle memory; 136 }; 137 138 struct mem_map_entry { 139 u64 base; 140 u64 size; 141 }; 142 143 typedef u32 cell_t; 144 145 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5); 146 147 #ifdef CONFIG_PPC64 148 extern int enter_prom(struct prom_args *args, unsigned long entry); 149 #else 150 static inline int enter_prom(struct prom_args *args, unsigned long entry) 151 { 152 return ((int (*)(struct prom_args *))entry)(args); 153 } 154 #endif 155 156 extern void copy_and_flush(unsigned long dest, unsigned long src, 157 unsigned long size, unsigned long offset); 158 159 /* prom structure */ 160 static struct prom_t __initdata prom; 161 162 static unsigned long prom_entry __initdata; 163 164 #define PROM_SCRATCH_SIZE 256 165 166 static char __initdata of_stdout_device[256]; 167 static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; 168 169 static unsigned long __initdata dt_header_start; 170 static unsigned long __initdata dt_struct_start, dt_struct_end; 171 static unsigned long __initdata dt_string_start, dt_string_end; 172 173 static unsigned long __initdata prom_initrd_start, prom_initrd_end; 174 175 #ifdef CONFIG_PPC64 176 static int __initdata prom_iommu_force_on; 177 static int __initdata prom_iommu_off; 178 static unsigned long __initdata prom_tce_alloc_start; 179 static unsigned long __initdata prom_tce_alloc_end; 180 #endif 181 182 /* Platforms codes are now obsolete in the kernel. Now only used within this 183 * file and ultimately gone too. Feel free to change them if you need, they 184 * are not shared with anything outside of this file anymore 185 */ 186 #define PLATFORM_PSERIES 0x0100 187 #define PLATFORM_PSERIES_LPAR 0x0101 188 #define PLATFORM_LPAR 0x0001 189 #define PLATFORM_POWERMAC 0x0400 190 #define PLATFORM_GENERIC 0x0500 191 192 static int __initdata of_platform; 193 194 static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; 195 196 static unsigned long __initdata alloc_top; 197 static unsigned long __initdata alloc_top_high; 198 static unsigned long __initdata alloc_bottom; 199 static unsigned long __initdata rmo_top; 200 static unsigned long __initdata ram_top; 201 202 static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; 203 static int __initdata mem_reserve_cnt; 204 205 static cell_t __initdata regbuf[1024]; 206 207 208 /* 209 * Error results ... some OF calls will return "-1" on error, some 210 * will return 0, some will return either. To simplify, here are 211 * macros to use with any ihandle or phandle return value to check if 212 * it is valid 213 */ 214 215 #define PROM_ERROR (-1u) 216 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) 217 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) 218 219 220 /* This is the one and *ONLY* place where we actually call open 221 * firmware. 222 */ 223 224 static int __init call_prom(const char *service, int nargs, int nret, ...) 225 { 226 int i; 227 struct prom_args args; 228 va_list list; 229 230 args.service = ADDR(service); 231 args.nargs = nargs; 232 args.nret = nret; 233 234 va_start(list, nret); 235 for (i = 0; i < nargs; i++) 236 args.args[i] = va_arg(list, prom_arg_t); 237 va_end(list); 238 239 for (i = 0; i < nret; i++) 240 args.args[nargs+i] = 0; 241 242 if (enter_prom(&args, RELOC(prom_entry)) < 0) 243 return PROM_ERROR; 244 245 return (nret > 0) ? args.args[nargs] : 0; 246 } 247 248 static int __init call_prom_ret(const char *service, int nargs, int nret, 249 prom_arg_t *rets, ...) 250 { 251 int i; 252 struct prom_args args; 253 va_list list; 254 255 args.service = ADDR(service); 256 args.nargs = nargs; 257 args.nret = nret; 258 259 va_start(list, rets); 260 for (i = 0; i < nargs; i++) 261 args.args[i] = va_arg(list, prom_arg_t); 262 va_end(list); 263 264 for (i = 0; i < nret; i++) 265 args.args[nargs+i] = 0; 266 267 if (enter_prom(&args, RELOC(prom_entry)) < 0) 268 return PROM_ERROR; 269 270 if (rets != NULL) 271 for (i = 1; i < nret; ++i) 272 rets[i-1] = args.args[nargs+i]; 273 274 return (nret > 0) ? args.args[nargs] : 0; 275 } 276 277 278 static void __init prom_print(const char *msg) 279 { 280 const char *p, *q; 281 struct prom_t *_prom = &RELOC(prom); 282 283 if (_prom->stdout == 0) 284 return; 285 286 for (p = msg; *p != 0; p = q) { 287 for (q = p; *q != 0 && *q != '\n'; ++q) 288 ; 289 if (q > p) 290 call_prom("write", 3, 1, _prom->stdout, p, q - p); 291 if (*q == 0) 292 break; 293 ++q; 294 call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); 295 } 296 } 297 298 299 static void __init prom_print_hex(unsigned long val) 300 { 301 int i, nibbles = sizeof(val)*2; 302 char buf[sizeof(val)*2+1]; 303 struct prom_t *_prom = &RELOC(prom); 304 305 for (i = nibbles-1; i >= 0; i--) { 306 buf[i] = (val & 0xf) + '0'; 307 if (buf[i] > '9') 308 buf[i] += ('a'-'0'-10); 309 val >>= 4; 310 } 311 buf[nibbles] = '\0'; 312 call_prom("write", 3, 1, _prom->stdout, buf, nibbles); 313 } 314 315 316 static void __init prom_printf(const char *format, ...) 317 { 318 const char *p, *q, *s; 319 va_list args; 320 unsigned long v; 321 struct prom_t *_prom = &RELOC(prom); 322 323 va_start(args, format); 324 #ifdef CONFIG_PPC64 325 format = PTRRELOC(format); 326 #endif 327 for (p = format; *p != 0; p = q) { 328 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) 329 ; 330 if (q > p) 331 call_prom("write", 3, 1, _prom->stdout, p, q - p); 332 if (*q == 0) 333 break; 334 if (*q == '\n') { 335 ++q; 336 call_prom("write", 3, 1, _prom->stdout, 337 ADDR("\r\n"), 2); 338 continue; 339 } 340 ++q; 341 if (*q == 0) 342 break; 343 switch (*q) { 344 case 's': 345 ++q; 346 s = va_arg(args, const char *); 347 prom_print(s); 348 break; 349 case 'x': 350 ++q; 351 v = va_arg(args, unsigned long); 352 prom_print_hex(v); 353 break; 354 } 355 } 356 } 357 358 359 static unsigned int __init prom_claim(unsigned long virt, unsigned long size, 360 unsigned long align) 361 { 362 struct prom_t *_prom = &RELOC(prom); 363 364 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { 365 /* 366 * Old OF requires we claim physical and virtual separately 367 * and then map explicitly (assuming virtual mode) 368 */ 369 int ret; 370 prom_arg_t result; 371 372 ret = call_prom_ret("call-method", 5, 2, &result, 373 ADDR("claim"), _prom->memory, 374 align, size, virt); 375 if (ret != 0 || result == -1) 376 return -1; 377 ret = call_prom_ret("call-method", 5, 2, &result, 378 ADDR("claim"), _prom->mmumap, 379 align, size, virt); 380 if (ret != 0) { 381 call_prom("call-method", 4, 1, ADDR("release"), 382 _prom->memory, size, virt); 383 return -1; 384 } 385 /* the 0x12 is M (coherence) + PP == read/write */ 386 call_prom("call-method", 6, 1, 387 ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); 388 return virt; 389 } 390 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, 391 (prom_arg_t)align); 392 } 393 394 static void __init __attribute__((noreturn)) prom_panic(const char *reason) 395 { 396 #ifdef CONFIG_PPC64 397 reason = PTRRELOC(reason); 398 #endif 399 prom_print(reason); 400 /* Do not call exit because it clears the screen on pmac 401 * it also causes some sort of double-fault on early pmacs */ 402 if (RELOC(of_platform) == PLATFORM_POWERMAC) 403 asm("trap\n"); 404 405 /* ToDo: should put up an SRC here on p/iSeries */ 406 call_prom("exit", 0, 0); 407 408 for (;;) /* should never get here */ 409 ; 410 } 411 412 413 static int __init prom_next_node(phandle *nodep) 414 { 415 phandle node; 416 417 if ((node = *nodep) != 0 418 && (*nodep = call_prom("child", 1, 1, node)) != 0) 419 return 1; 420 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 421 return 1; 422 for (;;) { 423 if ((node = call_prom("parent", 1, 1, node)) == 0) 424 return 0; 425 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 426 return 1; 427 } 428 } 429 430 static int inline prom_getprop(phandle node, const char *pname, 431 void *value, size_t valuelen) 432 { 433 return call_prom("getprop", 4, 1, node, ADDR(pname), 434 (u32)(unsigned long) value, (u32) valuelen); 435 } 436 437 static int inline prom_getproplen(phandle node, const char *pname) 438 { 439 return call_prom("getproplen", 2, 1, node, ADDR(pname)); 440 } 441 442 static void add_string(char **str, const char *q) 443 { 444 char *p = *str; 445 446 while (*q) 447 *p++ = *q++; 448 *p++ = ' '; 449 *str = p; 450 } 451 452 static char *tohex(unsigned int x) 453 { 454 static char digits[] = "0123456789abcdef"; 455 static char result[9]; 456 int i; 457 458 result[8] = 0; 459 i = 8; 460 do { 461 --i; 462 result[i] = digits[x & 0xf]; 463 x >>= 4; 464 } while (x != 0 && i > 0); 465 return &result[i]; 466 } 467 468 static int __init prom_setprop(phandle node, const char *nodename, 469 const char *pname, void *value, size_t valuelen) 470 { 471 char cmd[256], *p; 472 473 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) 474 return call_prom("setprop", 4, 1, node, ADDR(pname), 475 (u32)(unsigned long) value, (u32) valuelen); 476 477 /* gah... setprop doesn't work on longtrail, have to use interpret */ 478 p = cmd; 479 add_string(&p, "dev"); 480 add_string(&p, nodename); 481 add_string(&p, tohex((u32)(unsigned long) value)); 482 add_string(&p, tohex(valuelen)); 483 add_string(&p, tohex(ADDR(pname))); 484 add_string(&p, tohex(strlen(RELOC(pname)))); 485 add_string(&p, "property"); 486 *p = 0; 487 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); 488 } 489 490 /* 491 * Early parsing of the command line passed to the kernel, used for 492 * "mem=x" and the options that affect the iommu 493 */ 494 static void __init early_cmdline_parse(void) 495 { 496 struct prom_t *_prom = &RELOC(prom); 497 #ifdef CONFIG_PPC64 498 const char *opt; 499 #endif 500 char *p; 501 int l = 0; 502 503 RELOC(prom_cmd_line[0]) = 0; 504 p = RELOC(prom_cmd_line); 505 if ((long)_prom->chosen > 0) 506 l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); 507 #ifdef CONFIG_CMDLINE 508 if (l <= 0 || p[0] == '\0') /* dbl check */ 509 strlcpy(RELOC(prom_cmd_line), 510 RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); 511 #endif /* CONFIG_CMDLINE */ 512 prom_printf("command line: %s\n", RELOC(prom_cmd_line)); 513 514 #ifdef CONFIG_PPC64 515 opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); 516 if (opt) { 517 prom_printf("iommu opt is: %s\n", opt); 518 opt += 6; 519 while (*opt && *opt == ' ') 520 opt++; 521 if (!strncmp(opt, RELOC("off"), 3)) 522 RELOC(prom_iommu_off) = 1; 523 else if (!strncmp(opt, RELOC("force"), 5)) 524 RELOC(prom_iommu_force_on) = 1; 525 } 526 #endif 527 } 528 529 #ifdef CONFIG_PPC_PSERIES 530 /* 531 * There are two methods for telling firmware what our capabilities are. 532 * Newer machines have an "ibm,client-architecture-support" method on the 533 * root node. For older machines, we have to call the "process-elf-header" 534 * method in the /packages/elf-loader node, passing it a fake 32-bit 535 * ELF header containing a couple of PT_NOTE sections that contain 536 * structures that contain various information. 537 */ 538 539 /* 540 * New method - extensible architecture description vector. 541 * 542 * Because the description vector contains a mix of byte and word 543 * values, we declare it as an unsigned char array, and use this 544 * macro to put word values in. 545 */ 546 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ 547 ((x) >> 8) & 0xff, (x) & 0xff 548 549 /* Option vector bits - generic bits in byte 1 */ 550 #define OV_IGNORE 0x80 /* ignore this vector */ 551 #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ 552 553 /* Option vector 1: processor architectures supported */ 554 #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ 555 #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ 556 #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ 557 #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ 558 #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ 559 #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ 560 #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */ 561 562 /* Option vector 2: Open Firmware options supported */ 563 #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ 564 565 /* Option vector 3: processor options supported */ 566 #define OV3_FP 0x80 /* floating point */ 567 #define OV3_VMX 0x40 /* VMX/Altivec */ 568 #define OV3_DFP 0x20 /* decimal FP */ 569 570 /* Option vector 5: PAPR/OF options supported */ 571 #define OV5_LPAR 0x80 /* logical partitioning supported */ 572 #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ 573 /* ibm,dynamic-reconfiguration-memory property supported */ 574 #define OV5_DRCONF_MEMORY 0x20 575 #define OV5_LARGE_PAGES 0x10 /* large pages supported */ 576 #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */ 577 /* PCIe/MSI support. Without MSI full PCIe is not supported */ 578 #ifdef CONFIG_PCI_MSI 579 #define OV5_MSI 0x01 /* PCIe/MSI support */ 580 #else 581 #define OV5_MSI 0x00 582 #endif /* CONFIG_PCI_MSI */ 583 #ifdef CONFIG_PPC_SMLPAR 584 #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */ 585 #else 586 #define OV5_CMO 0x00 587 #endif 588 589 /* 590 * The architecture vector has an array of PVR mask/value pairs, 591 * followed by # option vectors - 1, followed by the option vectors. 592 */ 593 static unsigned char ibm_architecture_vec[] = { 594 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ 595 W(0xffff0000), W(0x003e0000), /* POWER6 */ 596 W(0xffff0000), W(0x003f0000), /* POWER7 */ 597 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ 598 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ 599 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ 600 5 - 1, /* 5 option vectors */ 601 602 /* option vector 1: processor architectures supported */ 603 3 - 2, /* length */ 604 0, /* don't ignore, don't halt */ 605 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | 606 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06, 607 608 /* option vector 2: Open Firmware options supported */ 609 34 - 2, /* length */ 610 OV2_REAL_MODE, 611 0, 0, 612 W(0xffffffff), /* real_base */ 613 W(0xffffffff), /* real_size */ 614 W(0xffffffff), /* virt_base */ 615 W(0xffffffff), /* virt_size */ 616 W(0xffffffff), /* load_base */ 617 W(64), /* 128MB min RMA */ 618 W(0xffffffff), /* full client load */ 619 0, /* min RMA percentage of total RAM */ 620 48, /* max log_2(hash table size) */ 621 622 /* option vector 3: processor options supported */ 623 3 - 2, /* length */ 624 0, /* don't ignore, don't halt */ 625 OV3_FP | OV3_VMX | OV3_DFP, 626 627 /* option vector 4: IBM PAPR implementation */ 628 2 - 2, /* length */ 629 0, /* don't halt */ 630 631 /* option vector 5: PAPR/OF options */ 632 5 - 2, /* length */ 633 0, /* don't ignore, don't halt */ 634 OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | 635 OV5_DONATE_DEDICATE_CPU | OV5_MSI, 636 0, 637 OV5_CMO, 638 }; 639 640 /* Old method - ELF header with PT_NOTE sections */ 641 static struct fake_elf { 642 Elf32_Ehdr elfhdr; 643 Elf32_Phdr phdr[2]; 644 struct chrpnote { 645 u32 namesz; 646 u32 descsz; 647 u32 type; 648 char name[8]; /* "PowerPC" */ 649 struct chrpdesc { 650 u32 real_mode; 651 u32 real_base; 652 u32 real_size; 653 u32 virt_base; 654 u32 virt_size; 655 u32 load_base; 656 } chrpdesc; 657 } chrpnote; 658 struct rpanote { 659 u32 namesz; 660 u32 descsz; 661 u32 type; 662 char name[24]; /* "IBM,RPA-Client-Config" */ 663 struct rpadesc { 664 u32 lpar_affinity; 665 u32 min_rmo_size; 666 u32 min_rmo_percent; 667 u32 max_pft_size; 668 u32 splpar; 669 u32 min_load; 670 u32 new_mem_def; 671 u32 ignore_me; 672 } rpadesc; 673 } rpanote; 674 } fake_elf = { 675 .elfhdr = { 676 .e_ident = { 0x7f, 'E', 'L', 'F', 677 ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, 678 .e_type = ET_EXEC, /* yeah right */ 679 .e_machine = EM_PPC, 680 .e_version = EV_CURRENT, 681 .e_phoff = offsetof(struct fake_elf, phdr), 682 .e_phentsize = sizeof(Elf32_Phdr), 683 .e_phnum = 2 684 }, 685 .phdr = { 686 [0] = { 687 .p_type = PT_NOTE, 688 .p_offset = offsetof(struct fake_elf, chrpnote), 689 .p_filesz = sizeof(struct chrpnote) 690 }, [1] = { 691 .p_type = PT_NOTE, 692 .p_offset = offsetof(struct fake_elf, rpanote), 693 .p_filesz = sizeof(struct rpanote) 694 } 695 }, 696 .chrpnote = { 697 .namesz = sizeof("PowerPC"), 698 .descsz = sizeof(struct chrpdesc), 699 .type = 0x1275, 700 .name = "PowerPC", 701 .chrpdesc = { 702 .real_mode = ~0U, /* ~0 means "don't care" */ 703 .real_base = ~0U, 704 .real_size = ~0U, 705 .virt_base = ~0U, 706 .virt_size = ~0U, 707 .load_base = ~0U 708 }, 709 }, 710 .rpanote = { 711 .namesz = sizeof("IBM,RPA-Client-Config"), 712 .descsz = sizeof(struct rpadesc), 713 .type = 0x12759999, 714 .name = "IBM,RPA-Client-Config", 715 .rpadesc = { 716 .lpar_affinity = 0, 717 .min_rmo_size = 64, /* in megabytes */ 718 .min_rmo_percent = 0, 719 .max_pft_size = 48, /* 2^48 bytes max PFT size */ 720 .splpar = 1, 721 .min_load = ~0U, 722 .new_mem_def = 0 723 } 724 } 725 }; 726 727 static void __init prom_send_capabilities(void) 728 { 729 ihandle elfloader, root; 730 prom_arg_t ret; 731 732 root = call_prom("open", 1, 1, ADDR("/")); 733 if (root != 0) { 734 /* try calling the ibm,client-architecture-support method */ 735 if (call_prom_ret("call-method", 3, 2, &ret, 736 ADDR("ibm,client-architecture-support"), 737 root, 738 ADDR(ibm_architecture_vec)) == 0) { 739 /* the call exists... */ 740 if (ret) 741 prom_printf("WARNING: ibm,client-architecture" 742 "-support call FAILED!\n"); 743 call_prom("close", 1, 0, root); 744 return; 745 } 746 call_prom("close", 1, 0, root); 747 } 748 749 /* no ibm,client-architecture-support call, try the old way */ 750 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); 751 if (elfloader == 0) { 752 prom_printf("couldn't open /packages/elf-loader\n"); 753 return; 754 } 755 call_prom("call-method", 3, 1, ADDR("process-elf-header"), 756 elfloader, ADDR(&fake_elf)); 757 call_prom("close", 1, 0, elfloader); 758 } 759 #endif 760 761 /* 762 * Memory allocation strategy... our layout is normally: 763 * 764 * at 14Mb or more we have vmlinux, then a gap and initrd. In some 765 * rare cases, initrd might end up being before the kernel though. 766 * We assume this won't override the final kernel at 0, we have no 767 * provision to handle that in this version, but it should hopefully 768 * never happen. 769 * 770 * alloc_top is set to the top of RMO, eventually shrink down if the 771 * TCEs overlap 772 * 773 * alloc_bottom is set to the top of kernel/initrd 774 * 775 * from there, allocations are done this way : rtas is allocated 776 * topmost, and the device-tree is allocated from the bottom. We try 777 * to grow the device-tree allocation as we progress. If we can't, 778 * then we fail, we don't currently have a facility to restart 779 * elsewhere, but that shouldn't be necessary. 780 * 781 * Note that calls to reserve_mem have to be done explicitly, memory 782 * allocated with either alloc_up or alloc_down isn't automatically 783 * reserved. 784 */ 785 786 787 /* 788 * Allocates memory in the RMO upward from the kernel/initrd 789 * 790 * When align is 0, this is a special case, it means to allocate in place 791 * at the current location of alloc_bottom or fail (that is basically 792 * extending the previous allocation). Used for the device-tree flattening 793 */ 794 static unsigned long __init alloc_up(unsigned long size, unsigned long align) 795 { 796 unsigned long base = RELOC(alloc_bottom); 797 unsigned long addr = 0; 798 799 if (align) 800 base = _ALIGN_UP(base, align); 801 prom_debug("alloc_up(%x, %x)\n", size, align); 802 if (RELOC(ram_top) == 0) 803 prom_panic("alloc_up() called with mem not initialized\n"); 804 805 if (align) 806 base = _ALIGN_UP(RELOC(alloc_bottom), align); 807 else 808 base = RELOC(alloc_bottom); 809 810 for(; (base + size) <= RELOC(alloc_top); 811 base = _ALIGN_UP(base + 0x100000, align)) { 812 prom_debug(" trying: 0x%x\n\r", base); 813 addr = (unsigned long)prom_claim(base, size, 0); 814 if (addr != PROM_ERROR && addr != 0) 815 break; 816 addr = 0; 817 if (align == 0) 818 break; 819 } 820 if (addr == 0) 821 return 0; 822 RELOC(alloc_bottom) = addr; 823 824 prom_debug(" -> %x\n", addr); 825 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 826 prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); 827 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 828 prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); 829 prom_debug(" ram_top : %x\n", RELOC(ram_top)); 830 831 return addr; 832 } 833 834 /* 835 * Allocates memory downward, either from top of RMO, or if highmem 836 * is set, from the top of RAM. Note that this one doesn't handle 837 * failures. It does claim memory if highmem is not set. 838 */ 839 static unsigned long __init alloc_down(unsigned long size, unsigned long align, 840 int highmem) 841 { 842 unsigned long base, addr = 0; 843 844 prom_debug("alloc_down(%x, %x, %s)\n", size, align, 845 highmem ? RELOC("(high)") : RELOC("(low)")); 846 if (RELOC(ram_top) == 0) 847 prom_panic("alloc_down() called with mem not initialized\n"); 848 849 if (highmem) { 850 /* Carve out storage for the TCE table. */ 851 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); 852 if (addr <= RELOC(alloc_bottom)) 853 return 0; 854 /* Will we bump into the RMO ? If yes, check out that we 855 * didn't overlap existing allocations there, if we did, 856 * we are dead, we must be the first in town ! 857 */ 858 if (addr < RELOC(rmo_top)) { 859 /* Good, we are first */ 860 if (RELOC(alloc_top) == RELOC(rmo_top)) 861 RELOC(alloc_top) = RELOC(rmo_top) = addr; 862 else 863 return 0; 864 } 865 RELOC(alloc_top_high) = addr; 866 goto bail; 867 } 868 869 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); 870 for (; base > RELOC(alloc_bottom); 871 base = _ALIGN_DOWN(base - 0x100000, align)) { 872 prom_debug(" trying: 0x%x\n\r", base); 873 addr = (unsigned long)prom_claim(base, size, 0); 874 if (addr != PROM_ERROR && addr != 0) 875 break; 876 addr = 0; 877 } 878 if (addr == 0) 879 return 0; 880 RELOC(alloc_top) = addr; 881 882 bail: 883 prom_debug(" -> %x\n", addr); 884 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 885 prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); 886 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 887 prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); 888 prom_debug(" ram_top : %x\n", RELOC(ram_top)); 889 890 return addr; 891 } 892 893 /* 894 * Parse a "reg" cell 895 */ 896 static unsigned long __init prom_next_cell(int s, cell_t **cellp) 897 { 898 cell_t *p = *cellp; 899 unsigned long r = 0; 900 901 /* Ignore more than 2 cells */ 902 while (s > sizeof(unsigned long) / 4) { 903 p++; 904 s--; 905 } 906 r = *p++; 907 #ifdef CONFIG_PPC64 908 if (s > 1) { 909 r <<= 32; 910 r |= *(p++); 911 } 912 #endif 913 *cellp = p; 914 return r; 915 } 916 917 /* 918 * Very dumb function for adding to the memory reserve list, but 919 * we don't need anything smarter at this point 920 * 921 * XXX Eventually check for collisions. They should NEVER happen. 922 * If problems seem to show up, it would be a good start to track 923 * them down. 924 */ 925 static void __init reserve_mem(u64 base, u64 size) 926 { 927 u64 top = base + size; 928 unsigned long cnt = RELOC(mem_reserve_cnt); 929 930 if (size == 0) 931 return; 932 933 /* We need to always keep one empty entry so that we 934 * have our terminator with "size" set to 0 since we are 935 * dumb and just copy this entire array to the boot params 936 */ 937 base = _ALIGN_DOWN(base, PAGE_SIZE); 938 top = _ALIGN_UP(top, PAGE_SIZE); 939 size = top - base; 940 941 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) 942 prom_panic("Memory reserve map exhausted !\n"); 943 RELOC(mem_reserve_map)[cnt].base = base; 944 RELOC(mem_reserve_map)[cnt].size = size; 945 RELOC(mem_reserve_cnt) = cnt + 1; 946 } 947 948 /* 949 * Initialize memory allocation mechanism, parse "memory" nodes and 950 * obtain that way the top of memory and RMO to setup out local allocator 951 */ 952 static void __init prom_init_mem(void) 953 { 954 phandle node; 955 char *path, type[64]; 956 unsigned int plen; 957 cell_t *p, *endp; 958 struct prom_t *_prom = &RELOC(prom); 959 u32 rac, rsc; 960 961 /* 962 * We iterate the memory nodes to find 963 * 1) top of RMO (first node) 964 * 2) top of memory 965 */ 966 rac = 2; 967 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); 968 rsc = 1; 969 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); 970 prom_debug("root_addr_cells: %x\n", (unsigned long) rac); 971 prom_debug("root_size_cells: %x\n", (unsigned long) rsc); 972 973 prom_debug("scanning memory:\n"); 974 path = RELOC(prom_scratch); 975 976 for (node = 0; prom_next_node(&node); ) { 977 type[0] = 0; 978 prom_getprop(node, "device_type", type, sizeof(type)); 979 980 if (type[0] == 0) { 981 /* 982 * CHRP Longtrail machines have no device_type 983 * on the memory node, so check the name instead... 984 */ 985 prom_getprop(node, "name", type, sizeof(type)); 986 } 987 if (strcmp(type, RELOC("memory"))) 988 continue; 989 990 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); 991 if (plen > sizeof(regbuf)) { 992 prom_printf("memory node too large for buffer !\n"); 993 plen = sizeof(regbuf); 994 } 995 p = RELOC(regbuf); 996 endp = p + (plen / sizeof(cell_t)); 997 998 #ifdef DEBUG_PROM 999 memset(path, 0, PROM_SCRATCH_SIZE); 1000 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 1001 prom_debug(" node %s :\n", path); 1002 #endif /* DEBUG_PROM */ 1003 1004 while ((endp - p) >= (rac + rsc)) { 1005 unsigned long base, size; 1006 1007 base = prom_next_cell(rac, &p); 1008 size = prom_next_cell(rsc, &p); 1009 1010 if (size == 0) 1011 continue; 1012 prom_debug(" %x %x\n", base, size); 1013 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) 1014 RELOC(rmo_top) = size; 1015 if ((base + size) > RELOC(ram_top)) 1016 RELOC(ram_top) = base + size; 1017 } 1018 } 1019 1020 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); 1021 1022 /* Check if we have an initrd after the kernel, if we do move our bottom 1023 * point to after it 1024 */ 1025 if (RELOC(prom_initrd_start)) { 1026 if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) 1027 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); 1028 } 1029 1030 /* 1031 * Setup our top alloc point, that is top of RMO or top of 1032 * segment 0 when running non-LPAR. 1033 * Some RS64 machines have buggy firmware where claims up at 1034 * 1GB fail. Cap at 768MB as a workaround. 1035 * Since 768MB is plenty of room, and we need to cap to something 1036 * reasonable on 32-bit, cap at 768MB on all machines. 1037 */ 1038 if (!RELOC(rmo_top)) 1039 RELOC(rmo_top) = RELOC(ram_top); 1040 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); 1041 RELOC(alloc_top) = RELOC(rmo_top); 1042 RELOC(alloc_top_high) = RELOC(ram_top); 1043 1044 prom_printf("memory layout at init:\n"); 1045 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 1046 prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); 1047 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 1048 prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); 1049 prom_printf(" ram_top : %x\n", RELOC(ram_top)); 1050 } 1051 1052 1053 /* 1054 * Allocate room for and instantiate RTAS 1055 */ 1056 static void __init prom_instantiate_rtas(void) 1057 { 1058 phandle rtas_node; 1059 ihandle rtas_inst; 1060 u32 base, entry = 0; 1061 u32 size = 0; 1062 1063 prom_debug("prom_instantiate_rtas: start...\n"); 1064 1065 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); 1066 prom_debug("rtas_node: %x\n", rtas_node); 1067 if (!PHANDLE_VALID(rtas_node)) 1068 return; 1069 1070 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); 1071 if (size == 0) 1072 return; 1073 1074 base = alloc_down(size, PAGE_SIZE, 0); 1075 if (base == 0) { 1076 prom_printf("RTAS allocation failed !\n"); 1077 return; 1078 } 1079 1080 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); 1081 if (!IHANDLE_VALID(rtas_inst)) { 1082 prom_printf("opening rtas package failed (%x)\n", rtas_inst); 1083 return; 1084 } 1085 1086 prom_printf("instantiating rtas at 0x%x ...", base); 1087 1088 if (call_prom_ret("call-method", 3, 2, &entry, 1089 ADDR("instantiate-rtas"), 1090 rtas_inst, base) != 0 1091 || entry == 0) { 1092 prom_printf(" failed\n"); 1093 return; 1094 } 1095 prom_printf(" done\n"); 1096 1097 reserve_mem(base, size); 1098 1099 prom_setprop(rtas_node, "/rtas", "linux,rtas-base", 1100 &base, sizeof(base)); 1101 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", 1102 &entry, sizeof(entry)); 1103 1104 prom_debug("rtas base = 0x%x\n", base); 1105 prom_debug("rtas entry = 0x%x\n", entry); 1106 prom_debug("rtas size = 0x%x\n", (long)size); 1107 1108 prom_debug("prom_instantiate_rtas: end...\n"); 1109 } 1110 1111 #ifdef CONFIG_PPC64 1112 /* 1113 * Allocate room for and initialize TCE tables 1114 */ 1115 static void __init prom_initialize_tce_table(void) 1116 { 1117 phandle node; 1118 ihandle phb_node; 1119 char compatible[64], type[64], model[64]; 1120 char *path = RELOC(prom_scratch); 1121 u64 base, align; 1122 u32 minalign, minsize; 1123 u64 tce_entry, *tce_entryp; 1124 u64 local_alloc_top, local_alloc_bottom; 1125 u64 i; 1126 1127 if (RELOC(prom_iommu_off)) 1128 return; 1129 1130 prom_debug("starting prom_initialize_tce_table\n"); 1131 1132 /* Cache current top of allocs so we reserve a single block */ 1133 local_alloc_top = RELOC(alloc_top_high); 1134 local_alloc_bottom = local_alloc_top; 1135 1136 /* Search all nodes looking for PHBs. */ 1137 for (node = 0; prom_next_node(&node); ) { 1138 compatible[0] = 0; 1139 type[0] = 0; 1140 model[0] = 0; 1141 prom_getprop(node, "compatible", 1142 compatible, sizeof(compatible)); 1143 prom_getprop(node, "device_type", type, sizeof(type)); 1144 prom_getprop(node, "model", model, sizeof(model)); 1145 1146 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) 1147 continue; 1148 1149 /* Keep the old logic intact to avoid regression. */ 1150 if (compatible[0] != 0) { 1151 if ((strstr(compatible, RELOC("python")) == NULL) && 1152 (strstr(compatible, RELOC("Speedwagon")) == NULL) && 1153 (strstr(compatible, RELOC("Winnipeg")) == NULL)) 1154 continue; 1155 } else if (model[0] != 0) { 1156 if ((strstr(model, RELOC("ython")) == NULL) && 1157 (strstr(model, RELOC("peedwagon")) == NULL) && 1158 (strstr(model, RELOC("innipeg")) == NULL)) 1159 continue; 1160 } 1161 1162 if (prom_getprop(node, "tce-table-minalign", &minalign, 1163 sizeof(minalign)) == PROM_ERROR) 1164 minalign = 0; 1165 if (prom_getprop(node, "tce-table-minsize", &minsize, 1166 sizeof(minsize)) == PROM_ERROR) 1167 minsize = 4UL << 20; 1168 1169 /* 1170 * Even though we read what OF wants, we just set the table 1171 * size to 4 MB. This is enough to map 2GB of PCI DMA space. 1172 * By doing this, we avoid the pitfalls of trying to DMA to 1173 * MMIO space and the DMA alias hole. 1174 * 1175 * On POWER4, firmware sets the TCE region by assuming 1176 * each TCE table is 8MB. Using this memory for anything 1177 * else will impact performance, so we always allocate 8MB. 1178 * Anton 1179 */ 1180 if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) 1181 minsize = 8UL << 20; 1182 else 1183 minsize = 4UL << 20; 1184 1185 /* Align to the greater of the align or size */ 1186 align = max(minalign, minsize); 1187 base = alloc_down(minsize, align, 1); 1188 if (base == 0) 1189 prom_panic("ERROR, cannot find space for TCE table.\n"); 1190 if (base < local_alloc_bottom) 1191 local_alloc_bottom = base; 1192 1193 /* It seems OF doesn't null-terminate the path :-( */ 1194 memset(path, 0, PROM_SCRATCH_SIZE); 1195 /* Call OF to setup the TCE hardware */ 1196 if (call_prom("package-to-path", 3, 1, node, 1197 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { 1198 prom_printf("package-to-path failed\n"); 1199 } 1200 1201 /* Save away the TCE table attributes for later use. */ 1202 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); 1203 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); 1204 1205 prom_debug("TCE table: %s\n", path); 1206 prom_debug("\tnode = 0x%x\n", node); 1207 prom_debug("\tbase = 0x%x\n", base); 1208 prom_debug("\tsize = 0x%x\n", minsize); 1209 1210 /* Initialize the table to have a one-to-one mapping 1211 * over the allocated size. 1212 */ 1213 tce_entryp = (unsigned long *)base; 1214 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { 1215 tce_entry = (i << PAGE_SHIFT); 1216 tce_entry |= 0x3; 1217 *tce_entryp = tce_entry; 1218 } 1219 1220 prom_printf("opening PHB %s", path); 1221 phb_node = call_prom("open", 1, 1, path); 1222 if (phb_node == 0) 1223 prom_printf("... failed\n"); 1224 else 1225 prom_printf("... done\n"); 1226 1227 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), 1228 phb_node, -1, minsize, 1229 (u32) base, (u32) (base >> 32)); 1230 call_prom("close", 1, 0, phb_node); 1231 } 1232 1233 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); 1234 1235 /* These are only really needed if there is a memory limit in 1236 * effect, but we don't know so export them always. */ 1237 RELOC(prom_tce_alloc_start) = local_alloc_bottom; 1238 RELOC(prom_tce_alloc_end) = local_alloc_top; 1239 1240 /* Flag the first invalid entry */ 1241 prom_debug("ending prom_initialize_tce_table\n"); 1242 } 1243 #endif 1244 1245 /* 1246 * With CHRP SMP we need to use the OF to start the other processors. 1247 * We can't wait until smp_boot_cpus (the OF is trashed by then) 1248 * so we have to put the processors into a holding pattern controlled 1249 * by the kernel (not OF) before we destroy the OF. 1250 * 1251 * This uses a chunk of low memory, puts some holding pattern 1252 * code there and sends the other processors off to there until 1253 * smp_boot_cpus tells them to do something. The holding pattern 1254 * checks that address until its cpu # is there, when it is that 1255 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care 1256 * of setting those values. 1257 * 1258 * We also use physical address 0x4 here to tell when a cpu 1259 * is in its holding pattern code. 1260 * 1261 * -- Cort 1262 */ 1263 extern char __secondary_hold; 1264 extern unsigned long __secondary_hold_spinloop; 1265 extern unsigned long __secondary_hold_acknowledge; 1266 1267 /* 1268 * We want to reference the copy of __secondary_hold_* in the 1269 * 0 - 0x100 address range 1270 */ 1271 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) 1272 1273 static void __init prom_hold_cpus(void) 1274 { 1275 unsigned long i; 1276 unsigned int reg; 1277 phandle node; 1278 char type[64]; 1279 struct prom_t *_prom = &RELOC(prom); 1280 unsigned long *spinloop 1281 = (void *) LOW_ADDR(__secondary_hold_spinloop); 1282 unsigned long *acknowledge 1283 = (void *) LOW_ADDR(__secondary_hold_acknowledge); 1284 unsigned long secondary_hold = LOW_ADDR(__secondary_hold); 1285 1286 prom_debug("prom_hold_cpus: start...\n"); 1287 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); 1288 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); 1289 prom_debug(" 1) acknowledge = 0x%x\n", 1290 (unsigned long)acknowledge); 1291 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); 1292 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); 1293 1294 /* Set the common spinloop variable, so all of the secondary cpus 1295 * will block when they are awakened from their OF spinloop. 1296 * This must occur for both SMP and non SMP kernels, since OF will 1297 * be trashed when we move the kernel. 1298 */ 1299 *spinloop = 0; 1300 1301 /* look for cpus */ 1302 for (node = 0; prom_next_node(&node); ) { 1303 type[0] = 0; 1304 prom_getprop(node, "device_type", type, sizeof(type)); 1305 if (strcmp(type, RELOC("cpu")) != 0) 1306 continue; 1307 1308 /* Skip non-configured cpus. */ 1309 if (prom_getprop(node, "status", type, sizeof(type)) > 0) 1310 if (strcmp(type, RELOC("okay")) != 0) 1311 continue; 1312 1313 reg = -1; 1314 prom_getprop(node, "reg", ®, sizeof(reg)); 1315 1316 prom_debug("cpu hw idx = 0x%x\n", reg); 1317 1318 /* Init the acknowledge var which will be reset by 1319 * the secondary cpu when it awakens from its OF 1320 * spinloop. 1321 */ 1322 *acknowledge = (unsigned long)-1; 1323 1324 if (reg != _prom->cpu) { 1325 /* Primary Thread of non-boot cpu */ 1326 prom_printf("starting cpu hw idx %x... ", reg); 1327 call_prom("start-cpu", 3, 0, node, 1328 secondary_hold, reg); 1329 1330 for (i = 0; (i < 100000000) && 1331 (*acknowledge == ((unsigned long)-1)); i++ ) 1332 mb(); 1333 1334 if (*acknowledge == reg) 1335 prom_printf("done\n"); 1336 else 1337 prom_printf("failed: %x\n", *acknowledge); 1338 } 1339 #ifdef CONFIG_SMP 1340 else 1341 prom_printf("boot cpu hw idx %x\n", reg); 1342 #endif /* CONFIG_SMP */ 1343 } 1344 1345 prom_debug("prom_hold_cpus: end...\n"); 1346 } 1347 1348 1349 static void __init prom_init_client_services(unsigned long pp) 1350 { 1351 struct prom_t *_prom = &RELOC(prom); 1352 1353 /* Get a handle to the prom entry point before anything else */ 1354 RELOC(prom_entry) = pp; 1355 1356 /* get a handle for the stdout device */ 1357 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); 1358 if (!PHANDLE_VALID(_prom->chosen)) 1359 prom_panic("cannot find chosen"); /* msg won't be printed :( */ 1360 1361 /* get device tree root */ 1362 _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); 1363 if (!PHANDLE_VALID(_prom->root)) 1364 prom_panic("cannot find device tree root"); /* msg won't be printed :( */ 1365 1366 _prom->mmumap = 0; 1367 } 1368 1369 #ifdef CONFIG_PPC32 1370 /* 1371 * For really old powermacs, we need to map things we claim. 1372 * For that, we need the ihandle of the mmu. 1373 * Also, on the longtrail, we need to work around other bugs. 1374 */ 1375 static void __init prom_find_mmu(void) 1376 { 1377 struct prom_t *_prom = &RELOC(prom); 1378 phandle oprom; 1379 char version[64]; 1380 1381 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); 1382 if (!PHANDLE_VALID(oprom)) 1383 return; 1384 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) 1385 return; 1386 version[sizeof(version) - 1] = 0; 1387 /* XXX might need to add other versions here */ 1388 if (strcmp(version, "Open Firmware, 1.0.5") == 0) 1389 of_workarounds = OF_WA_CLAIM; 1390 else if (strncmp(version, "FirmWorks,3.", 12) == 0) { 1391 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; 1392 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); 1393 } else 1394 return; 1395 _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); 1396 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, 1397 sizeof(_prom->mmumap)); 1398 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) 1399 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ 1400 } 1401 #else 1402 #define prom_find_mmu() 1403 #endif 1404 1405 static void __init prom_init_stdout(void) 1406 { 1407 struct prom_t *_prom = &RELOC(prom); 1408 char *path = RELOC(of_stdout_device); 1409 char type[16]; 1410 u32 val; 1411 1412 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) 1413 prom_panic("cannot find stdout"); 1414 1415 _prom->stdout = val; 1416 1417 /* Get the full OF pathname of the stdout device */ 1418 memset(path, 0, 256); 1419 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); 1420 val = call_prom("instance-to-package", 1, 1, _prom->stdout); 1421 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", 1422 &val, sizeof(val)); 1423 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); 1424 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", 1425 path, strlen(path) + 1); 1426 1427 /* If it's a display, note it */ 1428 memset(type, 0, sizeof(type)); 1429 prom_getprop(val, "device_type", type, sizeof(type)); 1430 if (strcmp(type, RELOC("display")) == 0) 1431 prom_setprop(val, path, "linux,boot-display", NULL, 0); 1432 } 1433 1434 static void __init prom_close_stdin(void) 1435 { 1436 struct prom_t *_prom = &RELOC(prom); 1437 ihandle val; 1438 1439 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) 1440 call_prom("close", 1, 0, val); 1441 } 1442 1443 static int __init prom_find_machine_type(void) 1444 { 1445 struct prom_t *_prom = &RELOC(prom); 1446 char compat[256]; 1447 int len, i = 0; 1448 #ifdef CONFIG_PPC64 1449 phandle rtas; 1450 int x; 1451 #endif 1452 1453 /* Look for a PowerMac */ 1454 len = prom_getprop(_prom->root, "compatible", 1455 compat, sizeof(compat)-1); 1456 if (len > 0) { 1457 compat[len] = 0; 1458 while (i < len) { 1459 char *p = &compat[i]; 1460 int sl = strlen(p); 1461 if (sl == 0) 1462 break; 1463 if (strstr(p, RELOC("Power Macintosh")) || 1464 strstr(p, RELOC("MacRISC"))) 1465 return PLATFORM_POWERMAC; 1466 #ifdef CONFIG_PPC64 1467 /* We must make sure we don't detect the IBM Cell 1468 * blades as pSeries due to some firmware issues, 1469 * so we do it here. 1470 */ 1471 if (strstr(p, RELOC("IBM,CBEA")) || 1472 strstr(p, RELOC("IBM,CPBW-1.0"))) 1473 return PLATFORM_GENERIC; 1474 #endif /* CONFIG_PPC64 */ 1475 i += sl + 1; 1476 } 1477 } 1478 #ifdef CONFIG_PPC64 1479 /* If not a mac, try to figure out if it's an IBM pSeries or any other 1480 * PAPR compliant platform. We assume it is if : 1481 * - /device_type is "chrp" (please, do NOT use that for future 1482 * non-IBM designs ! 1483 * - it has /rtas 1484 */ 1485 len = prom_getprop(_prom->root, "device_type", 1486 compat, sizeof(compat)-1); 1487 if (len <= 0) 1488 return PLATFORM_GENERIC; 1489 if (strcmp(compat, RELOC("chrp"))) 1490 return PLATFORM_GENERIC; 1491 1492 /* Default to pSeries. We need to know if we are running LPAR */ 1493 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); 1494 if (!PHANDLE_VALID(rtas)) 1495 return PLATFORM_GENERIC; 1496 x = prom_getproplen(rtas, "ibm,hypertas-functions"); 1497 if (x != PROM_ERROR) { 1498 prom_printf("Hypertas detected, assuming LPAR !\n"); 1499 return PLATFORM_PSERIES_LPAR; 1500 } 1501 return PLATFORM_PSERIES; 1502 #else 1503 return PLATFORM_GENERIC; 1504 #endif 1505 } 1506 1507 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) 1508 { 1509 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); 1510 } 1511 1512 /* 1513 * If we have a display that we don't know how to drive, 1514 * we will want to try to execute OF's open method for it 1515 * later. However, OF will probably fall over if we do that 1516 * we've taken over the MMU. 1517 * So we check whether we will need to open the display, 1518 * and if so, open it now. 1519 */ 1520 static void __init prom_check_displays(void) 1521 { 1522 char type[16], *path; 1523 phandle node; 1524 ihandle ih; 1525 int i; 1526 1527 static unsigned char default_colors[] = { 1528 0x00, 0x00, 0x00, 1529 0x00, 0x00, 0xaa, 1530 0x00, 0xaa, 0x00, 1531 0x00, 0xaa, 0xaa, 1532 0xaa, 0x00, 0x00, 1533 0xaa, 0x00, 0xaa, 1534 0xaa, 0xaa, 0x00, 1535 0xaa, 0xaa, 0xaa, 1536 0x55, 0x55, 0x55, 1537 0x55, 0x55, 0xff, 1538 0x55, 0xff, 0x55, 1539 0x55, 0xff, 0xff, 1540 0xff, 0x55, 0x55, 1541 0xff, 0x55, 0xff, 1542 0xff, 0xff, 0x55, 1543 0xff, 0xff, 0xff 1544 }; 1545 const unsigned char *clut; 1546 1547 prom_printf("Looking for displays\n"); 1548 for (node = 0; prom_next_node(&node); ) { 1549 memset(type, 0, sizeof(type)); 1550 prom_getprop(node, "device_type", type, sizeof(type)); 1551 if (strcmp(type, RELOC("display")) != 0) 1552 continue; 1553 1554 /* It seems OF doesn't null-terminate the path :-( */ 1555 path = RELOC(prom_scratch); 1556 memset(path, 0, PROM_SCRATCH_SIZE); 1557 1558 /* 1559 * leave some room at the end of the path for appending extra 1560 * arguments 1561 */ 1562 if (call_prom("package-to-path", 3, 1, node, path, 1563 PROM_SCRATCH_SIZE-10) == PROM_ERROR) 1564 continue; 1565 prom_printf("found display : %s, opening ... ", path); 1566 1567 ih = call_prom("open", 1, 1, path); 1568 if (ih == 0) { 1569 prom_printf("failed\n"); 1570 continue; 1571 } 1572 1573 /* Success */ 1574 prom_printf("done\n"); 1575 prom_setprop(node, path, "linux,opened", NULL, 0); 1576 1577 /* Setup a usable color table when the appropriate 1578 * method is available. Should update this to set-colors */ 1579 clut = RELOC(default_colors); 1580 for (i = 0; i < 32; i++, clut += 3) 1581 if (prom_set_color(ih, i, clut[0], clut[1], 1582 clut[2]) != 0) 1583 break; 1584 1585 #ifdef CONFIG_LOGO_LINUX_CLUT224 1586 clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); 1587 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) 1588 if (prom_set_color(ih, i + 32, clut[0], clut[1], 1589 clut[2]) != 0) 1590 break; 1591 #endif /* CONFIG_LOGO_LINUX_CLUT224 */ 1592 } 1593 } 1594 1595 1596 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ 1597 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, 1598 unsigned long needed, unsigned long align) 1599 { 1600 void *ret; 1601 1602 *mem_start = _ALIGN(*mem_start, align); 1603 while ((*mem_start + needed) > *mem_end) { 1604 unsigned long room, chunk; 1605 1606 prom_debug("Chunk exhausted, claiming more at %x...\n", 1607 RELOC(alloc_bottom)); 1608 room = RELOC(alloc_top) - RELOC(alloc_bottom); 1609 if (room > DEVTREE_CHUNK_SIZE) 1610 room = DEVTREE_CHUNK_SIZE; 1611 if (room < PAGE_SIZE) 1612 prom_panic("No memory for flatten_device_tree (no room)"); 1613 chunk = alloc_up(room, 0); 1614 if (chunk == 0) 1615 prom_panic("No memory for flatten_device_tree (claim failed)"); 1616 *mem_end = RELOC(alloc_top); 1617 } 1618 1619 ret = (void *)*mem_start; 1620 *mem_start += needed; 1621 1622 return ret; 1623 } 1624 1625 #define dt_push_token(token, mem_start, mem_end) \ 1626 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) 1627 1628 static unsigned long __init dt_find_string(char *str) 1629 { 1630 char *s, *os; 1631 1632 s = os = (char *)RELOC(dt_string_start); 1633 s += 4; 1634 while (s < (char *)RELOC(dt_string_end)) { 1635 if (strcmp(s, str) == 0) 1636 return s - os; 1637 s += strlen(s) + 1; 1638 } 1639 return 0; 1640 } 1641 1642 /* 1643 * The Open Firmware 1275 specification states properties must be 31 bytes or 1644 * less, however not all firmwares obey this. Make it 64 bytes to be safe. 1645 */ 1646 #define MAX_PROPERTY_NAME 64 1647 1648 static void __init scan_dt_build_strings(phandle node, 1649 unsigned long *mem_start, 1650 unsigned long *mem_end) 1651 { 1652 char *prev_name, *namep, *sstart; 1653 unsigned long soff; 1654 phandle child; 1655 1656 sstart = (char *)RELOC(dt_string_start); 1657 1658 /* get and store all property names */ 1659 prev_name = RELOC(""); 1660 for (;;) { 1661 /* 64 is max len of name including nul. */ 1662 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); 1663 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { 1664 /* No more nodes: unwind alloc */ 1665 *mem_start = (unsigned long)namep; 1666 break; 1667 } 1668 1669 /* skip "name" */ 1670 if (strcmp(namep, RELOC("name")) == 0) { 1671 *mem_start = (unsigned long)namep; 1672 prev_name = RELOC("name"); 1673 continue; 1674 } 1675 /* get/create string entry */ 1676 soff = dt_find_string(namep); 1677 if (soff != 0) { 1678 *mem_start = (unsigned long)namep; 1679 namep = sstart + soff; 1680 } else { 1681 /* Trim off some if we can */ 1682 *mem_start = (unsigned long)namep + strlen(namep) + 1; 1683 RELOC(dt_string_end) = *mem_start; 1684 } 1685 prev_name = namep; 1686 } 1687 1688 /* do all our children */ 1689 child = call_prom("child", 1, 1, node); 1690 while (child != 0) { 1691 scan_dt_build_strings(child, mem_start, mem_end); 1692 child = call_prom("peer", 1, 1, child); 1693 } 1694 } 1695 1696 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, 1697 unsigned long *mem_end) 1698 { 1699 phandle child; 1700 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; 1701 unsigned long soff; 1702 unsigned char *valp; 1703 static char pname[MAX_PROPERTY_NAME]; 1704 int l, room; 1705 1706 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); 1707 1708 /* get the node's full name */ 1709 namep = (char *)*mem_start; 1710 room = *mem_end - *mem_start; 1711 if (room > 255) 1712 room = 255; 1713 l = call_prom("package-to-path", 3, 1, node, namep, room); 1714 if (l >= 0) { 1715 /* Didn't fit? Get more room. */ 1716 if (l >= room) { 1717 if (l >= *mem_end - *mem_start) 1718 namep = make_room(mem_start, mem_end, l+1, 1); 1719 call_prom("package-to-path", 3, 1, node, namep, l); 1720 } 1721 namep[l] = '\0'; 1722 1723 /* Fixup an Apple bug where they have bogus \0 chars in the 1724 * middle of the path in some properties, and extract 1725 * the unit name (everything after the last '/'). 1726 */ 1727 for (lp = p = namep, ep = namep + l; p < ep; p++) { 1728 if (*p == '/') 1729 lp = namep; 1730 else if (*p != 0) 1731 *lp++ = *p; 1732 } 1733 *lp = 0; 1734 *mem_start = _ALIGN((unsigned long)lp + 1, 4); 1735 } 1736 1737 /* get it again for debugging */ 1738 path = RELOC(prom_scratch); 1739 memset(path, 0, PROM_SCRATCH_SIZE); 1740 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 1741 1742 /* get and store all properties */ 1743 prev_name = RELOC(""); 1744 sstart = (char *)RELOC(dt_string_start); 1745 for (;;) { 1746 if (call_prom("nextprop", 3, 1, node, prev_name, 1747 RELOC(pname)) != 1) 1748 break; 1749 1750 /* skip "name" */ 1751 if (strcmp(RELOC(pname), RELOC("name")) == 0) { 1752 prev_name = RELOC("name"); 1753 continue; 1754 } 1755 1756 /* find string offset */ 1757 soff = dt_find_string(RELOC(pname)); 1758 if (soff == 0) { 1759 prom_printf("WARNING: Can't find string index for" 1760 " <%s>, node %s\n", RELOC(pname), path); 1761 break; 1762 } 1763 prev_name = sstart + soff; 1764 1765 /* get length */ 1766 l = call_prom("getproplen", 2, 1, node, RELOC(pname)); 1767 1768 /* sanity checks */ 1769 if (l == PROM_ERROR) 1770 continue; 1771 if (l > MAX_PROPERTY_LENGTH) { 1772 prom_printf("WARNING: ignoring large property "); 1773 /* It seems OF doesn't null-terminate the path :-( */ 1774 prom_printf("[%s] ", path); 1775 prom_printf("%s length 0x%x\n", RELOC(pname), l); 1776 continue; 1777 } 1778 1779 /* push property head */ 1780 dt_push_token(OF_DT_PROP, mem_start, mem_end); 1781 dt_push_token(l, mem_start, mem_end); 1782 dt_push_token(soff, mem_start, mem_end); 1783 1784 /* push property content */ 1785 valp = make_room(mem_start, mem_end, l, 4); 1786 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); 1787 *mem_start = _ALIGN(*mem_start, 4); 1788 } 1789 1790 /* Add a "linux,phandle" property. */ 1791 soff = dt_find_string(RELOC("linux,phandle")); 1792 if (soff == 0) 1793 prom_printf("WARNING: Can't find string index for" 1794 " <linux-phandle> node %s\n", path); 1795 else { 1796 dt_push_token(OF_DT_PROP, mem_start, mem_end); 1797 dt_push_token(4, mem_start, mem_end); 1798 dt_push_token(soff, mem_start, mem_end); 1799 valp = make_room(mem_start, mem_end, 4, 4); 1800 *(u32 *)valp = node; 1801 } 1802 1803 /* do all our children */ 1804 child = call_prom("child", 1, 1, node); 1805 while (child != 0) { 1806 scan_dt_build_struct(child, mem_start, mem_end); 1807 child = call_prom("peer", 1, 1, child); 1808 } 1809 1810 dt_push_token(OF_DT_END_NODE, mem_start, mem_end); 1811 } 1812 1813 static void __init flatten_device_tree(void) 1814 { 1815 phandle root; 1816 unsigned long mem_start, mem_end, room; 1817 struct boot_param_header *hdr; 1818 struct prom_t *_prom = &RELOC(prom); 1819 char *namep; 1820 u64 *rsvmap; 1821 1822 /* 1823 * Check how much room we have between alloc top & bottom (+/- a 1824 * few pages), crop to 4Mb, as this is our "chuck" size 1825 */ 1826 room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; 1827 if (room > DEVTREE_CHUNK_SIZE) 1828 room = DEVTREE_CHUNK_SIZE; 1829 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); 1830 1831 /* Now try to claim that */ 1832 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); 1833 if (mem_start == 0) 1834 prom_panic("Can't allocate initial device-tree chunk\n"); 1835 mem_end = RELOC(alloc_top); 1836 1837 /* Get root of tree */ 1838 root = call_prom("peer", 1, 1, (phandle)0); 1839 if (root == (phandle)0) 1840 prom_panic ("couldn't get device tree root\n"); 1841 1842 /* Build header and make room for mem rsv map */ 1843 mem_start = _ALIGN(mem_start, 4); 1844 hdr = make_room(&mem_start, &mem_end, 1845 sizeof(struct boot_param_header), 4); 1846 RELOC(dt_header_start) = (unsigned long)hdr; 1847 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); 1848 1849 /* Start of strings */ 1850 mem_start = PAGE_ALIGN(mem_start); 1851 RELOC(dt_string_start) = mem_start; 1852 mem_start += 4; /* hole */ 1853 1854 /* Add "linux,phandle" in there, we'll need it */ 1855 namep = make_room(&mem_start, &mem_end, 16, 1); 1856 strcpy(namep, RELOC("linux,phandle")); 1857 mem_start = (unsigned long)namep + strlen(namep) + 1; 1858 1859 /* Build string array */ 1860 prom_printf("Building dt strings...\n"); 1861 scan_dt_build_strings(root, &mem_start, &mem_end); 1862 RELOC(dt_string_end) = mem_start; 1863 1864 /* Build structure */ 1865 mem_start = PAGE_ALIGN(mem_start); 1866 RELOC(dt_struct_start) = mem_start; 1867 prom_printf("Building dt structure...\n"); 1868 scan_dt_build_struct(root, &mem_start, &mem_end); 1869 dt_push_token(OF_DT_END, &mem_start, &mem_end); 1870 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); 1871 1872 /* Finish header */ 1873 hdr->boot_cpuid_phys = _prom->cpu; 1874 hdr->magic = OF_DT_HEADER; 1875 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); 1876 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); 1877 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); 1878 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); 1879 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); 1880 hdr->version = OF_DT_VERSION; 1881 /* Version 16 is not backward compatible */ 1882 hdr->last_comp_version = 0x10; 1883 1884 /* Copy the reserve map in */ 1885 memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); 1886 1887 #ifdef DEBUG_PROM 1888 { 1889 int i; 1890 prom_printf("reserved memory map:\n"); 1891 for (i = 0; i < RELOC(mem_reserve_cnt); i++) 1892 prom_printf(" %x - %x\n", 1893 RELOC(mem_reserve_map)[i].base, 1894 RELOC(mem_reserve_map)[i].size); 1895 } 1896 #endif 1897 /* Bump mem_reserve_cnt to cause further reservations to fail 1898 * since it's too late. 1899 */ 1900 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; 1901 1902 prom_printf("Device tree strings 0x%x -> 0x%x\n", 1903 RELOC(dt_string_start), RELOC(dt_string_end)); 1904 prom_printf("Device tree struct 0x%x -> 0x%x\n", 1905 RELOC(dt_struct_start), RELOC(dt_struct_end)); 1906 1907 } 1908 1909 #ifdef CONFIG_PPC_MAPLE 1910 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. 1911 * The values are bad, and it doesn't even have the right number of cells. */ 1912 static void __init fixup_device_tree_maple(void) 1913 { 1914 phandle isa; 1915 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ 1916 u32 isa_ranges[6]; 1917 char *name; 1918 1919 name = "/ht@0/isa@4"; 1920 isa = call_prom("finddevice", 1, 1, ADDR(name)); 1921 if (!PHANDLE_VALID(isa)) { 1922 name = "/ht@0/isa@6"; 1923 isa = call_prom("finddevice", 1, 1, ADDR(name)); 1924 rloc = 0x01003000; /* IO space; PCI device = 6 */ 1925 } 1926 if (!PHANDLE_VALID(isa)) 1927 return; 1928 1929 if (prom_getproplen(isa, "ranges") != 12) 1930 return; 1931 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) 1932 == PROM_ERROR) 1933 return; 1934 1935 if (isa_ranges[0] != 0x1 || 1936 isa_ranges[1] != 0xf4000000 || 1937 isa_ranges[2] != 0x00010000) 1938 return; 1939 1940 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); 1941 1942 isa_ranges[0] = 0x1; 1943 isa_ranges[1] = 0x0; 1944 isa_ranges[2] = rloc; 1945 isa_ranges[3] = 0x0; 1946 isa_ranges[4] = 0x0; 1947 isa_ranges[5] = 0x00010000; 1948 prom_setprop(isa, name, "ranges", 1949 isa_ranges, sizeof(isa_ranges)); 1950 } 1951 #else 1952 #define fixup_device_tree_maple() 1953 #endif 1954 1955 #ifdef CONFIG_PPC_CHRP 1956 /* 1957 * Pegasos and BriQ lacks the "ranges" property in the isa node 1958 * Pegasos needs decimal IRQ 14/15, not hexadecimal 1959 * Pegasos has the IDE configured in legacy mode, but advertised as native 1960 */ 1961 static void __init fixup_device_tree_chrp(void) 1962 { 1963 phandle ph; 1964 u32 prop[6]; 1965 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ 1966 char *name; 1967 int rc; 1968 1969 name = "/pci@80000000/isa@c"; 1970 ph = call_prom("finddevice", 1, 1, ADDR(name)); 1971 if (!PHANDLE_VALID(ph)) { 1972 name = "/pci@ff500000/isa@6"; 1973 ph = call_prom("finddevice", 1, 1, ADDR(name)); 1974 rloc = 0x01003000; /* IO space; PCI device = 6 */ 1975 } 1976 if (PHANDLE_VALID(ph)) { 1977 rc = prom_getproplen(ph, "ranges"); 1978 if (rc == 0 || rc == PROM_ERROR) { 1979 prom_printf("Fixing up missing ISA range on Pegasos...\n"); 1980 1981 prop[0] = 0x1; 1982 prop[1] = 0x0; 1983 prop[2] = rloc; 1984 prop[3] = 0x0; 1985 prop[4] = 0x0; 1986 prop[5] = 0x00010000; 1987 prom_setprop(ph, name, "ranges", prop, sizeof(prop)); 1988 } 1989 } 1990 1991 name = "/pci@80000000/ide@C,1"; 1992 ph = call_prom("finddevice", 1, 1, ADDR(name)); 1993 if (PHANDLE_VALID(ph)) { 1994 prom_printf("Fixing up IDE interrupt on Pegasos...\n"); 1995 prop[0] = 14; 1996 prop[1] = 0x0; 1997 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); 1998 prom_printf("Fixing up IDE class-code on Pegasos...\n"); 1999 rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); 2000 if (rc == sizeof(u32)) { 2001 prop[0] &= ~0x5; 2002 prom_setprop(ph, name, "class-code", prop, sizeof(u32)); 2003 } 2004 } 2005 } 2006 #else 2007 #define fixup_device_tree_chrp() 2008 #endif 2009 2010 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) 2011 static void __init fixup_device_tree_pmac(void) 2012 { 2013 phandle u3, i2c, mpic; 2014 u32 u3_rev; 2015 u32 interrupts[2]; 2016 u32 parent; 2017 2018 /* Some G5s have a missing interrupt definition, fix it up here */ 2019 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); 2020 if (!PHANDLE_VALID(u3)) 2021 return; 2022 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); 2023 if (!PHANDLE_VALID(i2c)) 2024 return; 2025 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); 2026 if (!PHANDLE_VALID(mpic)) 2027 return; 2028 2029 /* check if proper rev of u3 */ 2030 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) 2031 == PROM_ERROR) 2032 return; 2033 if (u3_rev < 0x35 || u3_rev > 0x39) 2034 return; 2035 /* does it need fixup ? */ 2036 if (prom_getproplen(i2c, "interrupts") > 0) 2037 return; 2038 2039 prom_printf("fixing up bogus interrupts for u3 i2c...\n"); 2040 2041 /* interrupt on this revision of u3 is number 0 and level */ 2042 interrupts[0] = 0; 2043 interrupts[1] = 1; 2044 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", 2045 &interrupts, sizeof(interrupts)); 2046 parent = (u32)mpic; 2047 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", 2048 &parent, sizeof(parent)); 2049 } 2050 #else 2051 #define fixup_device_tree_pmac() 2052 #endif 2053 2054 #ifdef CONFIG_PPC_EFIKA 2055 /* 2056 * The MPC5200 FEC driver requires an phy-handle property to tell it how 2057 * to talk to the phy. If the phy-handle property is missing, then this 2058 * function is called to add the appropriate nodes and link it to the 2059 * ethernet node. 2060 */ 2061 static void __init fixup_device_tree_efika_add_phy(void) 2062 { 2063 u32 node; 2064 char prop[64]; 2065 int rv; 2066 2067 /* Check if /builtin/ethernet exists - bail if it doesn't */ 2068 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); 2069 if (!PHANDLE_VALID(node)) 2070 return; 2071 2072 /* Check if the phy-handle property exists - bail if it does */ 2073 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); 2074 if (!rv) 2075 return; 2076 2077 /* 2078 * At this point the ethernet device doesn't have a phy described. 2079 * Now we need to add the missing phy node and linkage 2080 */ 2081 2082 /* Check for an MDIO bus node - if missing then create one */ 2083 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); 2084 if (!PHANDLE_VALID(node)) { 2085 prom_printf("Adding Ethernet MDIO node\n"); 2086 call_prom("interpret", 1, 1, 2087 " s\" /builtin\" find-device" 2088 " new-device" 2089 " 1 encode-int s\" #address-cells\" property" 2090 " 0 encode-int s\" #size-cells\" property" 2091 " s\" mdio\" device-name" 2092 " s\" fsl,mpc5200b-mdio\" encode-string" 2093 " s\" compatible\" property" 2094 " 0xf0003000 0x400 reg" 2095 " 0x2 encode-int" 2096 " 0x5 encode-int encode+" 2097 " 0x3 encode-int encode+" 2098 " s\" interrupts\" property" 2099 " finish-device"); 2100 }; 2101 2102 /* Check for a PHY device node - if missing then create one and 2103 * give it's phandle to the ethernet node */ 2104 node = call_prom("finddevice", 1, 1, 2105 ADDR("/builtin/mdio/ethernet-phy")); 2106 if (!PHANDLE_VALID(node)) { 2107 prom_printf("Adding Ethernet PHY node\n"); 2108 call_prom("interpret", 1, 1, 2109 " s\" /builtin/mdio\" find-device" 2110 " new-device" 2111 " s\" ethernet-phy\" device-name" 2112 " 0x10 encode-int s\" reg\" property" 2113 " my-self" 2114 " ihandle>phandle" 2115 " finish-device" 2116 " s\" /builtin/ethernet\" find-device" 2117 " encode-int" 2118 " s\" phy-handle\" property" 2119 " device-end"); 2120 } 2121 } 2122 2123 static void __init fixup_device_tree_efika(void) 2124 { 2125 int sound_irq[3] = { 2, 2, 0 }; 2126 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, 2127 3,4,0, 3,5,0, 3,6,0, 3,7,0, 2128 3,8,0, 3,9,0, 3,10,0, 3,11,0, 2129 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; 2130 u32 node; 2131 char prop[64]; 2132 int rv, len; 2133 2134 /* Check if we're really running on a EFIKA */ 2135 node = call_prom("finddevice", 1, 1, ADDR("/")); 2136 if (!PHANDLE_VALID(node)) 2137 return; 2138 2139 rv = prom_getprop(node, "model", prop, sizeof(prop)); 2140 if (rv == PROM_ERROR) 2141 return; 2142 if (strcmp(prop, "EFIKA5K2")) 2143 return; 2144 2145 prom_printf("Applying EFIKA device tree fixups\n"); 2146 2147 /* Claiming to be 'chrp' is death */ 2148 node = call_prom("finddevice", 1, 1, ADDR("/")); 2149 rv = prom_getprop(node, "device_type", prop, sizeof(prop)); 2150 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) 2151 prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); 2152 2153 /* CODEGEN,description is exposed in /proc/cpuinfo so 2154 fix that too */ 2155 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); 2156 if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) 2157 prom_setprop(node, "/", "CODEGEN,description", 2158 "Efika 5200B PowerPC System", 2159 sizeof("Efika 5200B PowerPC System")); 2160 2161 /* Fixup bestcomm interrupts property */ 2162 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); 2163 if (PHANDLE_VALID(node)) { 2164 len = prom_getproplen(node, "interrupts"); 2165 if (len == 12) { 2166 prom_printf("Fixing bestcomm interrupts property\n"); 2167 prom_setprop(node, "/builtin/bestcom", "interrupts", 2168 bcomm_irq, sizeof(bcomm_irq)); 2169 } 2170 } 2171 2172 /* Fixup sound interrupts property */ 2173 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); 2174 if (PHANDLE_VALID(node)) { 2175 rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); 2176 if (rv == PROM_ERROR) { 2177 prom_printf("Adding sound interrupts property\n"); 2178 prom_setprop(node, "/builtin/sound", "interrupts", 2179 sound_irq, sizeof(sound_irq)); 2180 } 2181 } 2182 2183 /* Make sure ethernet phy-handle property exists */ 2184 fixup_device_tree_efika_add_phy(); 2185 } 2186 #else 2187 #define fixup_device_tree_efika() 2188 #endif 2189 2190 static void __init fixup_device_tree(void) 2191 { 2192 fixup_device_tree_maple(); 2193 fixup_device_tree_chrp(); 2194 fixup_device_tree_pmac(); 2195 fixup_device_tree_efika(); 2196 } 2197 2198 static void __init prom_find_boot_cpu(void) 2199 { 2200 struct prom_t *_prom = &RELOC(prom); 2201 u32 getprop_rval; 2202 ihandle prom_cpu; 2203 phandle cpu_pkg; 2204 2205 _prom->cpu = 0; 2206 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) 2207 return; 2208 2209 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); 2210 2211 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); 2212 _prom->cpu = getprop_rval; 2213 2214 prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); 2215 } 2216 2217 static void __init prom_check_initrd(unsigned long r3, unsigned long r4) 2218 { 2219 #ifdef CONFIG_BLK_DEV_INITRD 2220 struct prom_t *_prom = &RELOC(prom); 2221 2222 if (r3 && r4 && r4 != 0xdeadbeef) { 2223 unsigned long val; 2224 2225 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; 2226 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; 2227 2228 val = RELOC(prom_initrd_start); 2229 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", 2230 &val, sizeof(val)); 2231 val = RELOC(prom_initrd_end); 2232 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", 2233 &val, sizeof(val)); 2234 2235 reserve_mem(RELOC(prom_initrd_start), 2236 RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); 2237 2238 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); 2239 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); 2240 } 2241 #endif /* CONFIG_BLK_DEV_INITRD */ 2242 } 2243 2244 /* 2245 * We enter here early on, when the Open Firmware prom is still 2246 * handling exceptions and the MMU hash table for us. 2247 */ 2248 2249 unsigned long __init prom_init(unsigned long r3, unsigned long r4, 2250 unsigned long pp, 2251 unsigned long r6, unsigned long r7, 2252 unsigned long kbase) 2253 { 2254 struct prom_t *_prom; 2255 unsigned long hdr; 2256 2257 #ifdef CONFIG_PPC32 2258 unsigned long offset = reloc_offset(); 2259 reloc_got2(offset); 2260 #endif 2261 2262 _prom = &RELOC(prom); 2263 2264 /* 2265 * First zero the BSS 2266 */ 2267 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); 2268 2269 /* 2270 * Init interface to Open Firmware, get some node references, 2271 * like /chosen 2272 */ 2273 prom_init_client_services(pp); 2274 2275 /* 2276 * See if this OF is old enough that we need to do explicit maps 2277 * and other workarounds 2278 */ 2279 prom_find_mmu(); 2280 2281 /* 2282 * Init prom stdout device 2283 */ 2284 prom_init_stdout(); 2285 2286 /* 2287 * Get default machine type. At this point, we do not differentiate 2288 * between pSeries SMP and pSeries LPAR 2289 */ 2290 RELOC(of_platform) = prom_find_machine_type(); 2291 2292 #ifndef CONFIG_RELOCATABLE 2293 /* Bail if this is a kdump kernel. */ 2294 if (PHYSICAL_START > 0) 2295 prom_panic("Error: You can't boot a kdump kernel from OF!\n"); 2296 #endif 2297 2298 /* 2299 * Check for an initrd 2300 */ 2301 prom_check_initrd(r3, r4); 2302 2303 #ifdef CONFIG_PPC_PSERIES 2304 /* 2305 * On pSeries, inform the firmware about our capabilities 2306 */ 2307 if (RELOC(of_platform) == PLATFORM_PSERIES || 2308 RELOC(of_platform) == PLATFORM_PSERIES_LPAR) 2309 prom_send_capabilities(); 2310 #endif 2311 2312 /* 2313 * Copy the CPU hold code 2314 */ 2315 if (RELOC(of_platform) != PLATFORM_POWERMAC) 2316 copy_and_flush(0, kbase, 0x100, 0); 2317 2318 /* 2319 * Do early parsing of command line 2320 */ 2321 early_cmdline_parse(); 2322 2323 /* 2324 * Initialize memory management within prom_init 2325 */ 2326 prom_init_mem(); 2327 2328 /* 2329 * Determine which cpu is actually running right _now_ 2330 */ 2331 prom_find_boot_cpu(); 2332 2333 /* 2334 * Initialize display devices 2335 */ 2336 prom_check_displays(); 2337 2338 #ifdef CONFIG_PPC64 2339 /* 2340 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else 2341 * that uses the allocator, we need to make sure we get the top of memory 2342 * available for us here... 2343 */ 2344 if (RELOC(of_platform) == PLATFORM_PSERIES) 2345 prom_initialize_tce_table(); 2346 #endif 2347 2348 /* 2349 * On non-powermacs, try to instantiate RTAS and puts all CPUs 2350 * in spin-loops. PowerMacs don't have a working RTAS and use 2351 * a different way to spin CPUs 2352 */ 2353 if (RELOC(of_platform) != PLATFORM_POWERMAC) { 2354 prom_instantiate_rtas(); 2355 prom_hold_cpus(); 2356 } 2357 2358 /* 2359 * Fill in some infos for use by the kernel later on 2360 */ 2361 #ifdef CONFIG_PPC64 2362 if (RELOC(prom_iommu_off)) 2363 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", 2364 NULL, 0); 2365 2366 if (RELOC(prom_iommu_force_on)) 2367 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", 2368 NULL, 0); 2369 2370 if (RELOC(prom_tce_alloc_start)) { 2371 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", 2372 &RELOC(prom_tce_alloc_start), 2373 sizeof(prom_tce_alloc_start)); 2374 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", 2375 &RELOC(prom_tce_alloc_end), 2376 sizeof(prom_tce_alloc_end)); 2377 } 2378 #endif 2379 2380 /* 2381 * Fixup any known bugs in the device-tree 2382 */ 2383 fixup_device_tree(); 2384 2385 /* 2386 * Now finally create the flattened device-tree 2387 */ 2388 prom_printf("copying OF device tree ...\n"); 2389 flatten_device_tree(); 2390 2391 /* 2392 * in case stdin is USB and still active on IBM machines... 2393 * Unfortunately quiesce crashes on some powermacs if we have 2394 * closed stdin already (in particular the powerbook 101). 2395 */ 2396 if (RELOC(of_platform) != PLATFORM_POWERMAC) 2397 prom_close_stdin(); 2398 2399 /* 2400 * Call OF "quiesce" method to shut down pending DMA's from 2401 * devices etc... 2402 */ 2403 prom_printf("Calling quiesce ...\n"); 2404 call_prom("quiesce", 0, 0); 2405 2406 /* 2407 * And finally, call the kernel passing it the flattened device 2408 * tree and NULL as r5, thus triggering the new entry point which 2409 * is common to us and kexec 2410 */ 2411 hdr = RELOC(dt_header_start); 2412 prom_printf("returning from prom_init\n"); 2413 prom_debug("->dt_header_start=0x%x\n", hdr); 2414 2415 #ifdef CONFIG_PPC32 2416 reloc_got2(-offset); 2417 #endif 2418 2419 __start(hdr, kbase, 0); 2420 2421 return 0; 2422 } 2423