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 #include <linux/linux_logo.h> 48 49 /* 50 * Properties whose value is longer than this get excluded from our 51 * copy of the device tree. This value does need to be big enough to 52 * ensure that we don't lose things like the interrupt-map property 53 * on a PCI-PCI bridge. 54 */ 55 #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) 56 57 /* 58 * Eventually bump that one up 59 */ 60 #define DEVTREE_CHUNK_SIZE 0x100000 61 62 /* 63 * This is the size of the local memory reserve map that gets copied 64 * into the boot params passed to the kernel. That size is totally 65 * flexible as the kernel just reads the list until it encounters an 66 * entry with size 0, so it can be changed without breaking binary 67 * compatibility 68 */ 69 #define MEM_RESERVE_MAP_SIZE 8 70 71 /* 72 * prom_init() is called very early on, before the kernel text 73 * and data have been mapped to KERNELBASE. At this point the code 74 * is running at whatever address it has been loaded at. 75 * On ppc32 we compile with -mrelocatable, which means that references 76 * to extern and static variables get relocated automatically. 77 * On ppc64 we have to relocate the references explicitly with 78 * RELOC. (Note that strings count as static variables.) 79 * 80 * Because OF may have mapped I/O devices into the area starting at 81 * KERNELBASE, particularly on CHRP machines, we can't safely call 82 * OF once the kernel has been mapped to KERNELBASE. Therefore all 83 * OF calls must be done within prom_init(). 84 * 85 * ADDR is used in calls to call_prom. The 4th and following 86 * arguments to call_prom should be 32-bit values. 87 * On ppc64, 64 bit values are truncated to 32 bits (and 88 * fortunately don't get interpreted as two arguments). 89 */ 90 #ifdef CONFIG_PPC64 91 #define RELOC(x) (*PTRRELOC(&(x))) 92 #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) 93 #define OF_WORKAROUNDS 0 94 #else 95 #define RELOC(x) (x) 96 #define ADDR(x) (u32) (x) 97 #define OF_WORKAROUNDS of_workarounds 98 int of_workarounds; 99 #endif 100 101 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ 102 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ 103 104 #define PROM_BUG() do { \ 105 prom_printf("kernel BUG at %s line 0x%x!\n", \ 106 RELOC(__FILE__), __LINE__); \ 107 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ 108 } while (0) 109 110 #ifdef DEBUG_PROM 111 #define prom_debug(x...) prom_printf(x) 112 #else 113 #define prom_debug(x...) 114 #endif 115 116 117 typedef u32 prom_arg_t; 118 119 struct prom_args { 120 u32 service; 121 u32 nargs; 122 u32 nret; 123 prom_arg_t args[10]; 124 }; 125 126 struct prom_t { 127 ihandle root; 128 phandle chosen; 129 int cpu; 130 ihandle stdout; 131 ihandle mmumap; 132 ihandle memory; 133 }; 134 135 struct mem_map_entry { 136 u64 base; 137 u64 size; 138 }; 139 140 typedef u32 cell_t; 141 142 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5); 143 144 #ifdef CONFIG_PPC64 145 extern int enter_prom(struct prom_args *args, unsigned long entry); 146 #else 147 static inline int enter_prom(struct prom_args *args, unsigned long entry) 148 { 149 return ((int (*)(struct prom_args *))entry)(args); 150 } 151 #endif 152 153 extern void copy_and_flush(unsigned long dest, unsigned long src, 154 unsigned long size, unsigned long offset); 155 156 /* prom structure */ 157 static struct prom_t __initdata prom; 158 159 static unsigned long prom_entry __initdata; 160 161 #define PROM_SCRATCH_SIZE 256 162 163 static char __initdata of_stdout_device[256]; 164 static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; 165 166 static unsigned long __initdata dt_header_start; 167 static unsigned long __initdata dt_struct_start, dt_struct_end; 168 static unsigned long __initdata dt_string_start, dt_string_end; 169 170 static unsigned long __initdata prom_initrd_start, prom_initrd_end; 171 172 #ifdef CONFIG_PPC64 173 static int __initdata prom_iommu_force_on; 174 static int __initdata prom_iommu_off; 175 static unsigned long __initdata prom_tce_alloc_start; 176 static unsigned long __initdata prom_tce_alloc_end; 177 #endif 178 179 /* Platforms codes are now obsolete in the kernel. Now only used within this 180 * file and ultimately gone too. Feel free to change them if you need, they 181 * are not shared with anything outside of this file anymore 182 */ 183 #define PLATFORM_PSERIES 0x0100 184 #define PLATFORM_PSERIES_LPAR 0x0101 185 #define PLATFORM_LPAR 0x0001 186 #define PLATFORM_POWERMAC 0x0400 187 #define PLATFORM_GENERIC 0x0500 188 189 static int __initdata of_platform; 190 191 static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; 192 193 static unsigned long __initdata alloc_top; 194 static unsigned long __initdata alloc_top_high; 195 static unsigned long __initdata alloc_bottom; 196 static unsigned long __initdata rmo_top; 197 static unsigned long __initdata ram_top; 198 199 static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; 200 static int __initdata mem_reserve_cnt; 201 202 static cell_t __initdata regbuf[1024]; 203 204 205 /* 206 * Error results ... some OF calls will return "-1" on error, some 207 * will return 0, some will return either. To simplify, here are 208 * macros to use with any ihandle or phandle return value to check if 209 * it is valid 210 */ 211 212 #define PROM_ERROR (-1u) 213 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) 214 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) 215 216 217 /* This is the one and *ONLY* place where we actually call open 218 * firmware. 219 */ 220 221 static int __init call_prom(const char *service, int nargs, int nret, ...) 222 { 223 int i; 224 struct prom_args args; 225 va_list list; 226 227 args.service = ADDR(service); 228 args.nargs = nargs; 229 args.nret = nret; 230 231 va_start(list, nret); 232 for (i = 0; i < nargs; i++) 233 args.args[i] = va_arg(list, prom_arg_t); 234 va_end(list); 235 236 for (i = 0; i < nret; i++) 237 args.args[nargs+i] = 0; 238 239 if (enter_prom(&args, RELOC(prom_entry)) < 0) 240 return PROM_ERROR; 241 242 return (nret > 0) ? args.args[nargs] : 0; 243 } 244 245 static int __init call_prom_ret(const char *service, int nargs, int nret, 246 prom_arg_t *rets, ...) 247 { 248 int i; 249 struct prom_args args; 250 va_list list; 251 252 args.service = ADDR(service); 253 args.nargs = nargs; 254 args.nret = nret; 255 256 va_start(list, rets); 257 for (i = 0; i < nargs; i++) 258 args.args[i] = va_arg(list, prom_arg_t); 259 va_end(list); 260 261 for (i = 0; i < nret; i++) 262 args.args[nargs+i] = 0; 263 264 if (enter_prom(&args, RELOC(prom_entry)) < 0) 265 return PROM_ERROR; 266 267 if (rets != NULL) 268 for (i = 1; i < nret; ++i) 269 rets[i-1] = args.args[nargs+i]; 270 271 return (nret > 0) ? args.args[nargs] : 0; 272 } 273 274 275 static void __init prom_print(const char *msg) 276 { 277 const char *p, *q; 278 struct prom_t *_prom = &RELOC(prom); 279 280 if (_prom->stdout == 0) 281 return; 282 283 for (p = msg; *p != 0; p = q) { 284 for (q = p; *q != 0 && *q != '\n'; ++q) 285 ; 286 if (q > p) 287 call_prom("write", 3, 1, _prom->stdout, p, q - p); 288 if (*q == 0) 289 break; 290 ++q; 291 call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); 292 } 293 } 294 295 296 static void __init prom_print_hex(unsigned long val) 297 { 298 int i, nibbles = sizeof(val)*2; 299 char buf[sizeof(val)*2+1]; 300 struct prom_t *_prom = &RELOC(prom); 301 302 for (i = nibbles-1; i >= 0; i--) { 303 buf[i] = (val & 0xf) + '0'; 304 if (buf[i] > '9') 305 buf[i] += ('a'-'0'-10); 306 val >>= 4; 307 } 308 buf[nibbles] = '\0'; 309 call_prom("write", 3, 1, _prom->stdout, buf, nibbles); 310 } 311 312 313 static void __init prom_printf(const char *format, ...) 314 { 315 const char *p, *q, *s; 316 va_list args; 317 unsigned long v; 318 struct prom_t *_prom = &RELOC(prom); 319 320 va_start(args, format); 321 #ifdef CONFIG_PPC64 322 format = PTRRELOC(format); 323 #endif 324 for (p = format; *p != 0; p = q) { 325 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) 326 ; 327 if (q > p) 328 call_prom("write", 3, 1, _prom->stdout, p, q - p); 329 if (*q == 0) 330 break; 331 if (*q == '\n') { 332 ++q; 333 call_prom("write", 3, 1, _prom->stdout, 334 ADDR("\r\n"), 2); 335 continue; 336 } 337 ++q; 338 if (*q == 0) 339 break; 340 switch (*q) { 341 case 's': 342 ++q; 343 s = va_arg(args, const char *); 344 prom_print(s); 345 break; 346 case 'x': 347 ++q; 348 v = va_arg(args, unsigned long); 349 prom_print_hex(v); 350 break; 351 } 352 } 353 } 354 355 356 static unsigned int __init prom_claim(unsigned long virt, unsigned long size, 357 unsigned long align) 358 { 359 struct prom_t *_prom = &RELOC(prom); 360 361 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { 362 /* 363 * Old OF requires we claim physical and virtual separately 364 * and then map explicitly (assuming virtual mode) 365 */ 366 int ret; 367 prom_arg_t result; 368 369 ret = call_prom_ret("call-method", 5, 2, &result, 370 ADDR("claim"), _prom->memory, 371 align, size, virt); 372 if (ret != 0 || result == -1) 373 return -1; 374 ret = call_prom_ret("call-method", 5, 2, &result, 375 ADDR("claim"), _prom->mmumap, 376 align, size, virt); 377 if (ret != 0) { 378 call_prom("call-method", 4, 1, ADDR("release"), 379 _prom->memory, size, virt); 380 return -1; 381 } 382 /* the 0x12 is M (coherence) + PP == read/write */ 383 call_prom("call-method", 6, 1, 384 ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); 385 return virt; 386 } 387 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, 388 (prom_arg_t)align); 389 } 390 391 static void __init __attribute__((noreturn)) prom_panic(const char *reason) 392 { 393 #ifdef CONFIG_PPC64 394 reason = PTRRELOC(reason); 395 #endif 396 prom_print(reason); 397 /* Do not call exit because it clears the screen on pmac 398 * it also causes some sort of double-fault on early pmacs */ 399 if (RELOC(of_platform) == PLATFORM_POWERMAC) 400 asm("trap\n"); 401 402 /* ToDo: should put up an SRC here on p/iSeries */ 403 call_prom("exit", 0, 0); 404 405 for (;;) /* should never get here */ 406 ; 407 } 408 409 410 static int __init prom_next_node(phandle *nodep) 411 { 412 phandle node; 413 414 if ((node = *nodep) != 0 415 && (*nodep = call_prom("child", 1, 1, node)) != 0) 416 return 1; 417 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 418 return 1; 419 for (;;) { 420 if ((node = call_prom("parent", 1, 1, node)) == 0) 421 return 0; 422 if ((*nodep = call_prom("peer", 1, 1, node)) != 0) 423 return 1; 424 } 425 } 426 427 static int inline prom_getprop(phandle node, const char *pname, 428 void *value, size_t valuelen) 429 { 430 return call_prom("getprop", 4, 1, node, ADDR(pname), 431 (u32)(unsigned long) value, (u32) valuelen); 432 } 433 434 static int inline prom_getproplen(phandle node, const char *pname) 435 { 436 return call_prom("getproplen", 2, 1, node, ADDR(pname)); 437 } 438 439 static void add_string(char **str, const char *q) 440 { 441 char *p = *str; 442 443 while (*q) 444 *p++ = *q++; 445 *p++ = ' '; 446 *str = p; 447 } 448 449 static char *tohex(unsigned int x) 450 { 451 static char digits[] = "0123456789abcdef"; 452 static char result[9]; 453 int i; 454 455 result[8] = 0; 456 i = 8; 457 do { 458 --i; 459 result[i] = digits[x & 0xf]; 460 x >>= 4; 461 } while (x != 0 && i > 0); 462 return &result[i]; 463 } 464 465 static int __init prom_setprop(phandle node, const char *nodename, 466 const char *pname, void *value, size_t valuelen) 467 { 468 char cmd[256], *p; 469 470 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) 471 return call_prom("setprop", 4, 1, node, ADDR(pname), 472 (u32)(unsigned long) value, (u32) valuelen); 473 474 /* gah... setprop doesn't work on longtrail, have to use interpret */ 475 p = cmd; 476 add_string(&p, "dev"); 477 add_string(&p, nodename); 478 add_string(&p, tohex((u32)(unsigned long) value)); 479 add_string(&p, tohex(valuelen)); 480 add_string(&p, tohex(ADDR(pname))); 481 add_string(&p, tohex(strlen(RELOC(pname)))); 482 add_string(&p, "property"); 483 *p = 0; 484 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); 485 } 486 487 /* 488 * Early parsing of the command line passed to the kernel, used for 489 * "mem=x" and the options that affect the iommu 490 */ 491 static void __init early_cmdline_parse(void) 492 { 493 struct prom_t *_prom = &RELOC(prom); 494 #ifdef CONFIG_PPC64 495 const char *opt; 496 #endif 497 char *p; 498 int l = 0; 499 500 RELOC(prom_cmd_line[0]) = 0; 501 p = RELOC(prom_cmd_line); 502 if ((long)_prom->chosen > 0) 503 l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); 504 #ifdef CONFIG_CMDLINE 505 if (l <= 0 || p[0] == '\0') /* dbl check */ 506 strlcpy(RELOC(prom_cmd_line), 507 RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); 508 #endif /* CONFIG_CMDLINE */ 509 prom_printf("command line: %s\n", RELOC(prom_cmd_line)); 510 511 #ifdef CONFIG_PPC64 512 opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); 513 if (opt) { 514 prom_printf("iommu opt is: %s\n", opt); 515 opt += 6; 516 while (*opt && *opt == ' ') 517 opt++; 518 if (!strncmp(opt, RELOC("off"), 3)) 519 RELOC(prom_iommu_off) = 1; 520 else if (!strncmp(opt, RELOC("force"), 5)) 521 RELOC(prom_iommu_force_on) = 1; 522 } 523 #endif 524 } 525 526 #ifdef CONFIG_PPC_PSERIES 527 /* 528 * There are two methods for telling firmware what our capabilities are. 529 * Newer machines have an "ibm,client-architecture-support" method on the 530 * root node. For older machines, we have to call the "process-elf-header" 531 * method in the /packages/elf-loader node, passing it a fake 32-bit 532 * ELF header containing a couple of PT_NOTE sections that contain 533 * structures that contain various information. 534 */ 535 536 /* 537 * New method - extensible architecture description vector. 538 * 539 * Because the description vector contains a mix of byte and word 540 * values, we declare it as an unsigned char array, and use this 541 * macro to put word values in. 542 */ 543 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ 544 ((x) >> 8) & 0xff, (x) & 0xff 545 546 /* Option vector bits - generic bits in byte 1 */ 547 #define OV_IGNORE 0x80 /* ignore this vector */ 548 #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ 549 550 /* Option vector 1: processor architectures supported */ 551 #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ 552 #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ 553 #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ 554 #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ 555 #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ 556 #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ 557 #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */ 558 559 /* Option vector 2: Open Firmware options supported */ 560 #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ 561 562 /* Option vector 3: processor options supported */ 563 #define OV3_FP 0x80 /* floating point */ 564 #define OV3_VMX 0x40 /* VMX/Altivec */ 565 #define OV3_DFP 0x20 /* decimal FP */ 566 567 /* Option vector 5: PAPR/OF options supported */ 568 #define OV5_LPAR 0x80 /* logical partitioning supported */ 569 #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ 570 /* ibm,dynamic-reconfiguration-memory property supported */ 571 #define OV5_DRCONF_MEMORY 0x20 572 #define OV5_LARGE_PAGES 0x10 /* large pages supported */ 573 #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */ 574 /* PCIe/MSI support. Without MSI full PCIe is not supported */ 575 #ifdef CONFIG_PCI_MSI 576 #define OV5_MSI 0x01 /* PCIe/MSI support */ 577 #else 578 #define OV5_MSI 0x00 579 #endif /* CONFIG_PCI_MSI */ 580 #ifdef CONFIG_PPC_SMLPAR 581 #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */ 582 #else 583 #define OV5_CMO 0x00 584 #endif 585 586 /* 587 * The architecture vector has an array of PVR mask/value pairs, 588 * followed by # option vectors - 1, followed by the option vectors. 589 */ 590 static unsigned char ibm_architecture_vec[] = { 591 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ 592 W(0xffff0000), W(0x003e0000), /* POWER6 */ 593 W(0xffff0000), W(0x003f0000), /* POWER7 */ 594 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ 595 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ 596 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ 597 5 - 1, /* 5 option vectors */ 598 599 /* option vector 1: processor architectures supported */ 600 3 - 2, /* length */ 601 0, /* don't ignore, don't halt */ 602 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | 603 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06, 604 605 /* option vector 2: Open Firmware options supported */ 606 34 - 2, /* length */ 607 OV2_REAL_MODE, 608 0, 0, 609 W(0xffffffff), /* real_base */ 610 W(0xffffffff), /* real_size */ 611 W(0xffffffff), /* virt_base */ 612 W(0xffffffff), /* virt_size */ 613 W(0xffffffff), /* load_base */ 614 W(64), /* 64MB min RMA */ 615 W(0xffffffff), /* full client load */ 616 0, /* min RMA percentage of total RAM */ 617 48, /* max log_2(hash table size) */ 618 619 /* option vector 3: processor options supported */ 620 3 - 2, /* length */ 621 0, /* don't ignore, don't halt */ 622 OV3_FP | OV3_VMX | OV3_DFP, 623 624 /* option vector 4: IBM PAPR implementation */ 625 2 - 2, /* length */ 626 0, /* don't halt */ 627 628 /* option vector 5: PAPR/OF options */ 629 5 - 2, /* length */ 630 0, /* don't ignore, don't halt */ 631 OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | 632 OV5_DONATE_DEDICATE_CPU | OV5_MSI, 633 0, 634 OV5_CMO, 635 }; 636 637 /* Old method - ELF header with PT_NOTE sections */ 638 static struct fake_elf { 639 Elf32_Ehdr elfhdr; 640 Elf32_Phdr phdr[2]; 641 struct chrpnote { 642 u32 namesz; 643 u32 descsz; 644 u32 type; 645 char name[8]; /* "PowerPC" */ 646 struct chrpdesc { 647 u32 real_mode; 648 u32 real_base; 649 u32 real_size; 650 u32 virt_base; 651 u32 virt_size; 652 u32 load_base; 653 } chrpdesc; 654 } chrpnote; 655 struct rpanote { 656 u32 namesz; 657 u32 descsz; 658 u32 type; 659 char name[24]; /* "IBM,RPA-Client-Config" */ 660 struct rpadesc { 661 u32 lpar_affinity; 662 u32 min_rmo_size; 663 u32 min_rmo_percent; 664 u32 max_pft_size; 665 u32 splpar; 666 u32 min_load; 667 u32 new_mem_def; 668 u32 ignore_me; 669 } rpadesc; 670 } rpanote; 671 } fake_elf = { 672 .elfhdr = { 673 .e_ident = { 0x7f, 'E', 'L', 'F', 674 ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, 675 .e_type = ET_EXEC, /* yeah right */ 676 .e_machine = EM_PPC, 677 .e_version = EV_CURRENT, 678 .e_phoff = offsetof(struct fake_elf, phdr), 679 .e_phentsize = sizeof(Elf32_Phdr), 680 .e_phnum = 2 681 }, 682 .phdr = { 683 [0] = { 684 .p_type = PT_NOTE, 685 .p_offset = offsetof(struct fake_elf, chrpnote), 686 .p_filesz = sizeof(struct chrpnote) 687 }, [1] = { 688 .p_type = PT_NOTE, 689 .p_offset = offsetof(struct fake_elf, rpanote), 690 .p_filesz = sizeof(struct rpanote) 691 } 692 }, 693 .chrpnote = { 694 .namesz = sizeof("PowerPC"), 695 .descsz = sizeof(struct chrpdesc), 696 .type = 0x1275, 697 .name = "PowerPC", 698 .chrpdesc = { 699 .real_mode = ~0U, /* ~0 means "don't care" */ 700 .real_base = ~0U, 701 .real_size = ~0U, 702 .virt_base = ~0U, 703 .virt_size = ~0U, 704 .load_base = ~0U 705 }, 706 }, 707 .rpanote = { 708 .namesz = sizeof("IBM,RPA-Client-Config"), 709 .descsz = sizeof(struct rpadesc), 710 .type = 0x12759999, 711 .name = "IBM,RPA-Client-Config", 712 .rpadesc = { 713 .lpar_affinity = 0, 714 .min_rmo_size = 64, /* in megabytes */ 715 .min_rmo_percent = 0, 716 .max_pft_size = 48, /* 2^48 bytes max PFT size */ 717 .splpar = 1, 718 .min_load = ~0U, 719 .new_mem_def = 0 720 } 721 } 722 }; 723 724 static void __init prom_send_capabilities(void) 725 { 726 ihandle elfloader, root; 727 prom_arg_t ret; 728 729 root = call_prom("open", 1, 1, ADDR("/")); 730 if (root != 0) { 731 /* try calling the ibm,client-architecture-support method */ 732 prom_printf("Calling ibm,client-architecture..."); 733 if (call_prom_ret("call-method", 3, 2, &ret, 734 ADDR("ibm,client-architecture-support"), 735 root, 736 ADDR(ibm_architecture_vec)) == 0) { 737 /* the call exists... */ 738 if (ret) 739 prom_printf("\nWARNING: ibm,client-architecture" 740 "-support call FAILED!\n"); 741 call_prom("close", 1, 0, root); 742 prom_printf(" done\n"); 743 return; 744 } 745 call_prom("close", 1, 0, root); 746 } 747 748 /* no ibm,client-architecture-support call, try the old way */ 749 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); 750 if (elfloader == 0) { 751 prom_printf("couldn't open /packages/elf-loader\n"); 752 return; 753 } 754 call_prom("call-method", 3, 1, ADDR("process-elf-header"), 755 elfloader, ADDR(&fake_elf)); 756 call_prom("close", 1, 0, elfloader); 757 } 758 #endif 759 760 /* 761 * Memory allocation strategy... our layout is normally: 762 * 763 * at 14Mb or more we have vmlinux, then a gap and initrd. In some 764 * rare cases, initrd might end up being before the kernel though. 765 * We assume this won't override the final kernel at 0, we have no 766 * provision to handle that in this version, but it should hopefully 767 * never happen. 768 * 769 * alloc_top is set to the top of RMO, eventually shrink down if the 770 * TCEs overlap 771 * 772 * alloc_bottom is set to the top of kernel/initrd 773 * 774 * from there, allocations are done this way : rtas is allocated 775 * topmost, and the device-tree is allocated from the bottom. We try 776 * to grow the device-tree allocation as we progress. If we can't, 777 * then we fail, we don't currently have a facility to restart 778 * elsewhere, but that shouldn't be necessary. 779 * 780 * Note that calls to reserve_mem have to be done explicitly, memory 781 * allocated with either alloc_up or alloc_down isn't automatically 782 * reserved. 783 */ 784 785 786 /* 787 * Allocates memory in the RMO upward from the kernel/initrd 788 * 789 * When align is 0, this is a special case, it means to allocate in place 790 * at the current location of alloc_bottom or fail (that is basically 791 * extending the previous allocation). Used for the device-tree flattening 792 */ 793 static unsigned long __init alloc_up(unsigned long size, unsigned long align) 794 { 795 unsigned long base = RELOC(alloc_bottom); 796 unsigned long addr = 0; 797 798 if (align) 799 base = _ALIGN_UP(base, align); 800 prom_debug("alloc_up(%x, %x)\n", size, align); 801 if (RELOC(ram_top) == 0) 802 prom_panic("alloc_up() called with mem not initialized\n"); 803 804 if (align) 805 base = _ALIGN_UP(RELOC(alloc_bottom), align); 806 else 807 base = RELOC(alloc_bottom); 808 809 for(; (base + size) <= RELOC(alloc_top); 810 base = _ALIGN_UP(base + 0x100000, align)) { 811 prom_debug(" trying: 0x%x\n\r", base); 812 addr = (unsigned long)prom_claim(base, size, 0); 813 if (addr != PROM_ERROR && addr != 0) 814 break; 815 addr = 0; 816 if (align == 0) 817 break; 818 } 819 if (addr == 0) 820 return 0; 821 RELOC(alloc_bottom) = addr; 822 823 prom_debug(" -> %x\n", addr); 824 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 825 prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); 826 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 827 prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); 828 prom_debug(" ram_top : %x\n", RELOC(ram_top)); 829 830 return addr; 831 } 832 833 /* 834 * Allocates memory downward, either from top of RMO, or if highmem 835 * is set, from the top of RAM. Note that this one doesn't handle 836 * failures. It does claim memory if highmem is not set. 837 */ 838 static unsigned long __init alloc_down(unsigned long size, unsigned long align, 839 int highmem) 840 { 841 unsigned long base, addr = 0; 842 843 prom_debug("alloc_down(%x, %x, %s)\n", size, align, 844 highmem ? RELOC("(high)") : RELOC("(low)")); 845 if (RELOC(ram_top) == 0) 846 prom_panic("alloc_down() called with mem not initialized\n"); 847 848 if (highmem) { 849 /* Carve out storage for the TCE table. */ 850 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); 851 if (addr <= RELOC(alloc_bottom)) 852 return 0; 853 /* Will we bump into the RMO ? If yes, check out that we 854 * didn't overlap existing allocations there, if we did, 855 * we are dead, we must be the first in town ! 856 */ 857 if (addr < RELOC(rmo_top)) { 858 /* Good, we are first */ 859 if (RELOC(alloc_top) == RELOC(rmo_top)) 860 RELOC(alloc_top) = RELOC(rmo_top) = addr; 861 else 862 return 0; 863 } 864 RELOC(alloc_top_high) = addr; 865 goto bail; 866 } 867 868 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); 869 for (; base > RELOC(alloc_bottom); 870 base = _ALIGN_DOWN(base - 0x100000, align)) { 871 prom_debug(" trying: 0x%x\n\r", base); 872 addr = (unsigned long)prom_claim(base, size, 0); 873 if (addr != PROM_ERROR && addr != 0) 874 break; 875 addr = 0; 876 } 877 if (addr == 0) 878 return 0; 879 RELOC(alloc_top) = addr; 880 881 bail: 882 prom_debug(" -> %x\n", addr); 883 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 884 prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); 885 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 886 prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); 887 prom_debug(" ram_top : %x\n", RELOC(ram_top)); 888 889 return addr; 890 } 891 892 /* 893 * Parse a "reg" cell 894 */ 895 static unsigned long __init prom_next_cell(int s, cell_t **cellp) 896 { 897 cell_t *p = *cellp; 898 unsigned long r = 0; 899 900 /* Ignore more than 2 cells */ 901 while (s > sizeof(unsigned long) / 4) { 902 p++; 903 s--; 904 } 905 r = *p++; 906 #ifdef CONFIG_PPC64 907 if (s > 1) { 908 r <<= 32; 909 r |= *(p++); 910 } 911 #endif 912 *cellp = p; 913 return r; 914 } 915 916 /* 917 * Very dumb function for adding to the memory reserve list, but 918 * we don't need anything smarter at this point 919 * 920 * XXX Eventually check for collisions. They should NEVER happen. 921 * If problems seem to show up, it would be a good start to track 922 * them down. 923 */ 924 static void __init reserve_mem(u64 base, u64 size) 925 { 926 u64 top = base + size; 927 unsigned long cnt = RELOC(mem_reserve_cnt); 928 929 if (size == 0) 930 return; 931 932 /* We need to always keep one empty entry so that we 933 * have our terminator with "size" set to 0 since we are 934 * dumb and just copy this entire array to the boot params 935 */ 936 base = _ALIGN_DOWN(base, PAGE_SIZE); 937 top = _ALIGN_UP(top, PAGE_SIZE); 938 size = top - base; 939 940 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) 941 prom_panic("Memory reserve map exhausted !\n"); 942 RELOC(mem_reserve_map)[cnt].base = base; 943 RELOC(mem_reserve_map)[cnt].size = size; 944 RELOC(mem_reserve_cnt) = cnt + 1; 945 } 946 947 /* 948 * Initialize memory allocation mechanism, parse "memory" nodes and 949 * obtain that way the top of memory and RMO to setup out local allocator 950 */ 951 static void __init prom_init_mem(void) 952 { 953 phandle node; 954 char *path, type[64]; 955 unsigned int plen; 956 cell_t *p, *endp; 957 struct prom_t *_prom = &RELOC(prom); 958 u32 rac, rsc; 959 960 /* 961 * We iterate the memory nodes to find 962 * 1) top of RMO (first node) 963 * 2) top of memory 964 */ 965 rac = 2; 966 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); 967 rsc = 1; 968 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); 969 prom_debug("root_addr_cells: %x\n", (unsigned long) rac); 970 prom_debug("root_size_cells: %x\n", (unsigned long) rsc); 971 972 prom_debug("scanning memory:\n"); 973 path = RELOC(prom_scratch); 974 975 for (node = 0; prom_next_node(&node); ) { 976 type[0] = 0; 977 prom_getprop(node, "device_type", type, sizeof(type)); 978 979 if (type[0] == 0) { 980 /* 981 * CHRP Longtrail machines have no device_type 982 * on the memory node, so check the name instead... 983 */ 984 prom_getprop(node, "name", type, sizeof(type)); 985 } 986 if (strcmp(type, RELOC("memory"))) 987 continue; 988 989 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); 990 if (plen > sizeof(regbuf)) { 991 prom_printf("memory node too large for buffer !\n"); 992 plen = sizeof(regbuf); 993 } 994 p = RELOC(regbuf); 995 endp = p + (plen / sizeof(cell_t)); 996 997 #ifdef DEBUG_PROM 998 memset(path, 0, PROM_SCRATCH_SIZE); 999 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 1000 prom_debug(" node %s :\n", path); 1001 #endif /* DEBUG_PROM */ 1002 1003 while ((endp - p) >= (rac + rsc)) { 1004 unsigned long base, size; 1005 1006 base = prom_next_cell(rac, &p); 1007 size = prom_next_cell(rsc, &p); 1008 1009 if (size == 0) 1010 continue; 1011 prom_debug(" %x %x\n", base, size); 1012 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) 1013 RELOC(rmo_top) = size; 1014 if ((base + size) > RELOC(ram_top)) 1015 RELOC(ram_top) = base + size; 1016 } 1017 } 1018 1019 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); 1020 1021 /* Check if we have an initrd after the kernel, if we do move our bottom 1022 * point to after it 1023 */ 1024 if (RELOC(prom_initrd_start)) { 1025 if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) 1026 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); 1027 } 1028 1029 /* 1030 * Setup our top alloc point, that is top of RMO or top of 1031 * segment 0 when running non-LPAR. 1032 * Some RS64 machines have buggy firmware where claims up at 1033 * 1GB fail. Cap at 768MB as a workaround. 1034 * Since 768MB is plenty of room, and we need to cap to something 1035 * reasonable on 32-bit, cap at 768MB on all machines. 1036 */ 1037 if (!RELOC(rmo_top)) 1038 RELOC(rmo_top) = RELOC(ram_top); 1039 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); 1040 RELOC(alloc_top) = RELOC(rmo_top); 1041 RELOC(alloc_top_high) = RELOC(ram_top); 1042 1043 prom_printf("memory layout at init:\n"); 1044 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); 1045 prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); 1046 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); 1047 prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); 1048 prom_printf(" ram_top : %x\n", RELOC(ram_top)); 1049 } 1050 1051 1052 /* 1053 * Allocate room for and instantiate RTAS 1054 */ 1055 static void __init prom_instantiate_rtas(void) 1056 { 1057 phandle rtas_node; 1058 ihandle rtas_inst; 1059 u32 base, entry = 0; 1060 u32 size = 0; 1061 1062 prom_debug("prom_instantiate_rtas: start...\n"); 1063 1064 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); 1065 prom_debug("rtas_node: %x\n", rtas_node); 1066 if (!PHANDLE_VALID(rtas_node)) 1067 return; 1068 1069 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); 1070 if (size == 0) 1071 return; 1072 1073 base = alloc_down(size, PAGE_SIZE, 0); 1074 if (base == 0) { 1075 prom_printf("RTAS allocation failed !\n"); 1076 return; 1077 } 1078 1079 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); 1080 if (!IHANDLE_VALID(rtas_inst)) { 1081 prom_printf("opening rtas package failed (%x)\n", rtas_inst); 1082 return; 1083 } 1084 1085 prom_printf("instantiating rtas at 0x%x...", base); 1086 1087 if (call_prom_ret("call-method", 3, 2, &entry, 1088 ADDR("instantiate-rtas"), 1089 rtas_inst, base) != 0 1090 || entry == 0) { 1091 prom_printf(" failed\n"); 1092 return; 1093 } 1094 prom_printf(" done\n"); 1095 1096 reserve_mem(base, size); 1097 1098 prom_setprop(rtas_node, "/rtas", "linux,rtas-base", 1099 &base, sizeof(base)); 1100 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", 1101 &entry, sizeof(entry)); 1102 1103 prom_debug("rtas base = 0x%x\n", base); 1104 prom_debug("rtas entry = 0x%x\n", entry); 1105 prom_debug("rtas size = 0x%x\n", (long)size); 1106 1107 prom_debug("prom_instantiate_rtas: end...\n"); 1108 } 1109 1110 #ifdef CONFIG_PPC64 1111 /* 1112 * Allocate room for and initialize TCE tables 1113 */ 1114 static void __init prom_initialize_tce_table(void) 1115 { 1116 phandle node; 1117 ihandle phb_node; 1118 char compatible[64], type[64], model[64]; 1119 char *path = RELOC(prom_scratch); 1120 u64 base, align; 1121 u32 minalign, minsize; 1122 u64 tce_entry, *tce_entryp; 1123 u64 local_alloc_top, local_alloc_bottom; 1124 u64 i; 1125 1126 if (RELOC(prom_iommu_off)) 1127 return; 1128 1129 prom_debug("starting prom_initialize_tce_table\n"); 1130 1131 /* Cache current top of allocs so we reserve a single block */ 1132 local_alloc_top = RELOC(alloc_top_high); 1133 local_alloc_bottom = local_alloc_top; 1134 1135 /* Search all nodes looking for PHBs. */ 1136 for (node = 0; prom_next_node(&node); ) { 1137 compatible[0] = 0; 1138 type[0] = 0; 1139 model[0] = 0; 1140 prom_getprop(node, "compatible", 1141 compatible, sizeof(compatible)); 1142 prom_getprop(node, "device_type", type, sizeof(type)); 1143 prom_getprop(node, "model", model, sizeof(model)); 1144 1145 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) 1146 continue; 1147 1148 /* Keep the old logic intact to avoid regression. */ 1149 if (compatible[0] != 0) { 1150 if ((strstr(compatible, RELOC("python")) == NULL) && 1151 (strstr(compatible, RELOC("Speedwagon")) == NULL) && 1152 (strstr(compatible, RELOC("Winnipeg")) == NULL)) 1153 continue; 1154 } else if (model[0] != 0) { 1155 if ((strstr(model, RELOC("ython")) == NULL) && 1156 (strstr(model, RELOC("peedwagon")) == NULL) && 1157 (strstr(model, RELOC("innipeg")) == NULL)) 1158 continue; 1159 } 1160 1161 if (prom_getprop(node, "tce-table-minalign", &minalign, 1162 sizeof(minalign)) == PROM_ERROR) 1163 minalign = 0; 1164 if (prom_getprop(node, "tce-table-minsize", &minsize, 1165 sizeof(minsize)) == PROM_ERROR) 1166 minsize = 4UL << 20; 1167 1168 /* 1169 * Even though we read what OF wants, we just set the table 1170 * size to 4 MB. This is enough to map 2GB of PCI DMA space. 1171 * By doing this, we avoid the pitfalls of trying to DMA to 1172 * MMIO space and the DMA alias hole. 1173 * 1174 * On POWER4, firmware sets the TCE region by assuming 1175 * each TCE table is 8MB. Using this memory for anything 1176 * else will impact performance, so we always allocate 8MB. 1177 * Anton 1178 */ 1179 if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) 1180 minsize = 8UL << 20; 1181 else 1182 minsize = 4UL << 20; 1183 1184 /* Align to the greater of the align or size */ 1185 align = max(minalign, minsize); 1186 base = alloc_down(minsize, align, 1); 1187 if (base == 0) 1188 prom_panic("ERROR, cannot find space for TCE table.\n"); 1189 if (base < local_alloc_bottom) 1190 local_alloc_bottom = base; 1191 1192 /* It seems OF doesn't null-terminate the path :-( */ 1193 memset(path, 0, PROM_SCRATCH_SIZE); 1194 /* Call OF to setup the TCE hardware */ 1195 if (call_prom("package-to-path", 3, 1, node, 1196 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { 1197 prom_printf("package-to-path failed\n"); 1198 } 1199 1200 /* Save away the TCE table attributes for later use. */ 1201 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); 1202 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); 1203 1204 prom_debug("TCE table: %s\n", path); 1205 prom_debug("\tnode = 0x%x\n", node); 1206 prom_debug("\tbase = 0x%x\n", base); 1207 prom_debug("\tsize = 0x%x\n", minsize); 1208 1209 /* Initialize the table to have a one-to-one mapping 1210 * over the allocated size. 1211 */ 1212 tce_entryp = (u64 *)base; 1213 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { 1214 tce_entry = (i << PAGE_SHIFT); 1215 tce_entry |= 0x3; 1216 *tce_entryp = tce_entry; 1217 } 1218 1219 prom_printf("opening PHB %s", path); 1220 phb_node = call_prom("open", 1, 1, path); 1221 if (phb_node == 0) 1222 prom_printf("... failed\n"); 1223 else 1224 prom_printf("... done\n"); 1225 1226 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), 1227 phb_node, -1, minsize, 1228 (u32) base, (u32) (base >> 32)); 1229 call_prom("close", 1, 0, phb_node); 1230 } 1231 1232 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); 1233 1234 /* These are only really needed if there is a memory limit in 1235 * effect, but we don't know so export them always. */ 1236 RELOC(prom_tce_alloc_start) = local_alloc_bottom; 1237 RELOC(prom_tce_alloc_end) = local_alloc_top; 1238 1239 /* Flag the first invalid entry */ 1240 prom_debug("ending prom_initialize_tce_table\n"); 1241 } 1242 #endif 1243 1244 /* 1245 * With CHRP SMP we need to use the OF to start the other processors. 1246 * We can't wait until smp_boot_cpus (the OF is trashed by then) 1247 * so we have to put the processors into a holding pattern controlled 1248 * by the kernel (not OF) before we destroy the OF. 1249 * 1250 * This uses a chunk of low memory, puts some holding pattern 1251 * code there and sends the other processors off to there until 1252 * smp_boot_cpus tells them to do something. The holding pattern 1253 * checks that address until its cpu # is there, when it is that 1254 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care 1255 * of setting those values. 1256 * 1257 * We also use physical address 0x4 here to tell when a cpu 1258 * is in its holding pattern code. 1259 * 1260 * -- Cort 1261 */ 1262 extern char __secondary_hold; 1263 extern unsigned long __secondary_hold_spinloop; 1264 extern unsigned long __secondary_hold_acknowledge; 1265 1266 /* 1267 * We want to reference the copy of __secondary_hold_* in the 1268 * 0 - 0x100 address range 1269 */ 1270 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) 1271 1272 static void __init prom_hold_cpus(void) 1273 { 1274 unsigned long i; 1275 unsigned int reg; 1276 phandle node; 1277 char type[64]; 1278 struct prom_t *_prom = &RELOC(prom); 1279 unsigned long *spinloop 1280 = (void *) LOW_ADDR(__secondary_hold_spinloop); 1281 unsigned long *acknowledge 1282 = (void *) LOW_ADDR(__secondary_hold_acknowledge); 1283 unsigned long secondary_hold = LOW_ADDR(__secondary_hold); 1284 1285 prom_debug("prom_hold_cpus: start...\n"); 1286 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); 1287 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); 1288 prom_debug(" 1) acknowledge = 0x%x\n", 1289 (unsigned long)acknowledge); 1290 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); 1291 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); 1292 1293 /* Set the common spinloop variable, so all of the secondary cpus 1294 * will block when they are awakened from their OF spinloop. 1295 * This must occur for both SMP and non SMP kernels, since OF will 1296 * be trashed when we move the kernel. 1297 */ 1298 *spinloop = 0; 1299 1300 /* look for cpus */ 1301 for (node = 0; prom_next_node(&node); ) { 1302 type[0] = 0; 1303 prom_getprop(node, "device_type", type, sizeof(type)); 1304 if (strcmp(type, RELOC("cpu")) != 0) 1305 continue; 1306 1307 /* Skip non-configured cpus. */ 1308 if (prom_getprop(node, "status", type, sizeof(type)) > 0) 1309 if (strcmp(type, RELOC("okay")) != 0) 1310 continue; 1311 1312 reg = -1; 1313 prom_getprop(node, "reg", ®, sizeof(reg)); 1314 1315 prom_debug("cpu hw idx = 0x%x\n", reg); 1316 1317 /* Init the acknowledge var which will be reset by 1318 * the secondary cpu when it awakens from its OF 1319 * spinloop. 1320 */ 1321 *acknowledge = (unsigned long)-1; 1322 1323 if (reg != _prom->cpu) { 1324 /* Primary Thread of non-boot cpu */ 1325 prom_printf("starting cpu hw idx %x... ", reg); 1326 call_prom("start-cpu", 3, 0, node, 1327 secondary_hold, reg); 1328 1329 for (i = 0; (i < 100000000) && 1330 (*acknowledge == ((unsigned long)-1)); i++ ) 1331 mb(); 1332 1333 if (*acknowledge == reg) 1334 prom_printf("done\n"); 1335 else 1336 prom_printf("failed: %x\n", *acknowledge); 1337 } 1338 #ifdef CONFIG_SMP 1339 else 1340 prom_printf("boot cpu hw idx %x\n", reg); 1341 #endif /* CONFIG_SMP */ 1342 } 1343 1344 prom_debug("prom_hold_cpus: end...\n"); 1345 } 1346 1347 1348 static void __init prom_init_client_services(unsigned long pp) 1349 { 1350 struct prom_t *_prom = &RELOC(prom); 1351 1352 /* Get a handle to the prom entry point before anything else */ 1353 RELOC(prom_entry) = pp; 1354 1355 /* get a handle for the stdout device */ 1356 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); 1357 if (!PHANDLE_VALID(_prom->chosen)) 1358 prom_panic("cannot find chosen"); /* msg won't be printed :( */ 1359 1360 /* get device tree root */ 1361 _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); 1362 if (!PHANDLE_VALID(_prom->root)) 1363 prom_panic("cannot find device tree root"); /* msg won't be printed :( */ 1364 1365 _prom->mmumap = 0; 1366 } 1367 1368 #ifdef CONFIG_PPC32 1369 /* 1370 * For really old powermacs, we need to map things we claim. 1371 * For that, we need the ihandle of the mmu. 1372 * Also, on the longtrail, we need to work around other bugs. 1373 */ 1374 static void __init prom_find_mmu(void) 1375 { 1376 struct prom_t *_prom = &RELOC(prom); 1377 phandle oprom; 1378 char version[64]; 1379 1380 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); 1381 if (!PHANDLE_VALID(oprom)) 1382 return; 1383 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) 1384 return; 1385 version[sizeof(version) - 1] = 0; 1386 /* XXX might need to add other versions here */ 1387 if (strcmp(version, "Open Firmware, 1.0.5") == 0) 1388 of_workarounds = OF_WA_CLAIM; 1389 else if (strncmp(version, "FirmWorks,3.", 12) == 0) { 1390 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; 1391 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); 1392 } else 1393 return; 1394 _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); 1395 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, 1396 sizeof(_prom->mmumap)); 1397 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) 1398 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ 1399 } 1400 #else 1401 #define prom_find_mmu() 1402 #endif 1403 1404 static void __init prom_init_stdout(void) 1405 { 1406 struct prom_t *_prom = &RELOC(prom); 1407 char *path = RELOC(of_stdout_device); 1408 char type[16]; 1409 u32 val; 1410 1411 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) 1412 prom_panic("cannot find stdout"); 1413 1414 _prom->stdout = val; 1415 1416 /* Get the full OF pathname of the stdout device */ 1417 memset(path, 0, 256); 1418 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); 1419 val = call_prom("instance-to-package", 1, 1, _prom->stdout); 1420 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", 1421 &val, sizeof(val)); 1422 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); 1423 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", 1424 path, strlen(path) + 1); 1425 1426 /* If it's a display, note it */ 1427 memset(type, 0, sizeof(type)); 1428 prom_getprop(val, "device_type", type, sizeof(type)); 1429 if (strcmp(type, RELOC("display")) == 0) 1430 prom_setprop(val, path, "linux,boot-display", NULL, 0); 1431 } 1432 1433 static void __init prom_close_stdin(void) 1434 { 1435 struct prom_t *_prom = &RELOC(prom); 1436 ihandle val; 1437 1438 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) 1439 call_prom("close", 1, 0, val); 1440 } 1441 1442 static int __init prom_find_machine_type(void) 1443 { 1444 struct prom_t *_prom = &RELOC(prom); 1445 char compat[256]; 1446 int len, i = 0; 1447 #ifdef CONFIG_PPC64 1448 phandle rtas; 1449 int x; 1450 #endif 1451 1452 /* Look for a PowerMac */ 1453 len = prom_getprop(_prom->root, "compatible", 1454 compat, sizeof(compat)-1); 1455 if (len > 0) { 1456 compat[len] = 0; 1457 while (i < len) { 1458 char *p = &compat[i]; 1459 int sl = strlen(p); 1460 if (sl == 0) 1461 break; 1462 if (strstr(p, RELOC("Power Macintosh")) || 1463 strstr(p, RELOC("MacRISC"))) 1464 return PLATFORM_POWERMAC; 1465 #ifdef CONFIG_PPC64 1466 /* We must make sure we don't detect the IBM Cell 1467 * blades as pSeries due to some firmware issues, 1468 * so we do it here. 1469 */ 1470 if (strstr(p, RELOC("IBM,CBEA")) || 1471 strstr(p, RELOC("IBM,CPBW-1.0"))) 1472 return PLATFORM_GENERIC; 1473 #endif /* CONFIG_PPC64 */ 1474 i += sl + 1; 1475 } 1476 } 1477 #ifdef CONFIG_PPC64 1478 /* If not a mac, try to figure out if it's an IBM pSeries or any other 1479 * PAPR compliant platform. We assume it is if : 1480 * - /device_type is "chrp" (please, do NOT use that for future 1481 * non-IBM designs ! 1482 * - it has /rtas 1483 */ 1484 len = prom_getprop(_prom->root, "device_type", 1485 compat, sizeof(compat)-1); 1486 if (len <= 0) 1487 return PLATFORM_GENERIC; 1488 if (strcmp(compat, RELOC("chrp"))) 1489 return PLATFORM_GENERIC; 1490 1491 /* Default to pSeries. We need to know if we are running LPAR */ 1492 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); 1493 if (!PHANDLE_VALID(rtas)) 1494 return PLATFORM_GENERIC; 1495 x = prom_getproplen(rtas, "ibm,hypertas-functions"); 1496 if (x != PROM_ERROR) { 1497 prom_debug("Hypertas detected, assuming LPAR !\n"); 1498 return PLATFORM_PSERIES_LPAR; 1499 } 1500 return PLATFORM_PSERIES; 1501 #else 1502 return PLATFORM_GENERIC; 1503 #endif 1504 } 1505 1506 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) 1507 { 1508 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); 1509 } 1510 1511 /* 1512 * If we have a display that we don't know how to drive, 1513 * we will want to try to execute OF's open method for it 1514 * later. However, OF will probably fall over if we do that 1515 * we've taken over the MMU. 1516 * So we check whether we will need to open the display, 1517 * and if so, open it now. 1518 */ 1519 static void __init prom_check_displays(void) 1520 { 1521 char type[16], *path; 1522 phandle node; 1523 ihandle ih; 1524 int i; 1525 1526 static unsigned char default_colors[] = { 1527 0x00, 0x00, 0x00, 1528 0x00, 0x00, 0xaa, 1529 0x00, 0xaa, 0x00, 1530 0x00, 0xaa, 0xaa, 1531 0xaa, 0x00, 0x00, 1532 0xaa, 0x00, 0xaa, 1533 0xaa, 0xaa, 0x00, 1534 0xaa, 0xaa, 0xaa, 1535 0x55, 0x55, 0x55, 1536 0x55, 0x55, 0xff, 1537 0x55, 0xff, 0x55, 1538 0x55, 0xff, 0xff, 1539 0xff, 0x55, 0x55, 1540 0xff, 0x55, 0xff, 1541 0xff, 0xff, 0x55, 1542 0xff, 0xff, 0xff 1543 }; 1544 const unsigned char *clut; 1545 1546 prom_debug("Looking for displays\n"); 1547 for (node = 0; prom_next_node(&node); ) { 1548 memset(type, 0, sizeof(type)); 1549 prom_getprop(node, "device_type", type, sizeof(type)); 1550 if (strcmp(type, RELOC("display")) != 0) 1551 continue; 1552 1553 /* It seems OF doesn't null-terminate the path :-( */ 1554 path = RELOC(prom_scratch); 1555 memset(path, 0, PROM_SCRATCH_SIZE); 1556 1557 /* 1558 * leave some room at the end of the path for appending extra 1559 * arguments 1560 */ 1561 if (call_prom("package-to-path", 3, 1, node, path, 1562 PROM_SCRATCH_SIZE-10) == PROM_ERROR) 1563 continue; 1564 prom_printf("found display : %s, opening... ", path); 1565 1566 ih = call_prom("open", 1, 1, path); 1567 if (ih == 0) { 1568 prom_printf("failed\n"); 1569 continue; 1570 } 1571 1572 /* Success */ 1573 prom_printf("done\n"); 1574 prom_setprop(node, path, "linux,opened", NULL, 0); 1575 1576 /* Setup a usable color table when the appropriate 1577 * method is available. Should update this to set-colors */ 1578 clut = RELOC(default_colors); 1579 for (i = 0; i < 32; i++, clut += 3) 1580 if (prom_set_color(ih, i, clut[0], clut[1], 1581 clut[2]) != 0) 1582 break; 1583 1584 #ifdef CONFIG_LOGO_LINUX_CLUT224 1585 clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); 1586 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) 1587 if (prom_set_color(ih, i + 32, clut[0], clut[1], 1588 clut[2]) != 0) 1589 break; 1590 #endif /* CONFIG_LOGO_LINUX_CLUT224 */ 1591 } 1592 } 1593 1594 1595 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ 1596 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, 1597 unsigned long needed, unsigned long align) 1598 { 1599 void *ret; 1600 1601 *mem_start = _ALIGN(*mem_start, align); 1602 while ((*mem_start + needed) > *mem_end) { 1603 unsigned long room, chunk; 1604 1605 prom_debug("Chunk exhausted, claiming more at %x...\n", 1606 RELOC(alloc_bottom)); 1607 room = RELOC(alloc_top) - RELOC(alloc_bottom); 1608 if (room > DEVTREE_CHUNK_SIZE) 1609 room = DEVTREE_CHUNK_SIZE; 1610 if (room < PAGE_SIZE) 1611 prom_panic("No memory for flatten_device_tree (no room)"); 1612 chunk = alloc_up(room, 0); 1613 if (chunk == 0) 1614 prom_panic("No memory for flatten_device_tree (claim failed)"); 1615 *mem_end = RELOC(alloc_top); 1616 } 1617 1618 ret = (void *)*mem_start; 1619 *mem_start += needed; 1620 1621 return ret; 1622 } 1623 1624 #define dt_push_token(token, mem_start, mem_end) \ 1625 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) 1626 1627 static unsigned long __init dt_find_string(char *str) 1628 { 1629 char *s, *os; 1630 1631 s = os = (char *)RELOC(dt_string_start); 1632 s += 4; 1633 while (s < (char *)RELOC(dt_string_end)) { 1634 if (strcmp(s, str) == 0) 1635 return s - os; 1636 s += strlen(s) + 1; 1637 } 1638 return 0; 1639 } 1640 1641 /* 1642 * The Open Firmware 1275 specification states properties must be 31 bytes or 1643 * less, however not all firmwares obey this. Make it 64 bytes to be safe. 1644 */ 1645 #define MAX_PROPERTY_NAME 64 1646 1647 static void __init scan_dt_build_strings(phandle node, 1648 unsigned long *mem_start, 1649 unsigned long *mem_end) 1650 { 1651 char *prev_name, *namep, *sstart; 1652 unsigned long soff; 1653 phandle child; 1654 1655 sstart = (char *)RELOC(dt_string_start); 1656 1657 /* get and store all property names */ 1658 prev_name = RELOC(""); 1659 for (;;) { 1660 /* 64 is max len of name including nul. */ 1661 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); 1662 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { 1663 /* No more nodes: unwind alloc */ 1664 *mem_start = (unsigned long)namep; 1665 break; 1666 } 1667 1668 /* skip "name" */ 1669 if (strcmp(namep, RELOC("name")) == 0) { 1670 *mem_start = (unsigned long)namep; 1671 prev_name = RELOC("name"); 1672 continue; 1673 } 1674 /* get/create string entry */ 1675 soff = dt_find_string(namep); 1676 if (soff != 0) { 1677 *mem_start = (unsigned long)namep; 1678 namep = sstart + soff; 1679 } else { 1680 /* Trim off some if we can */ 1681 *mem_start = (unsigned long)namep + strlen(namep) + 1; 1682 RELOC(dt_string_end) = *mem_start; 1683 } 1684 prev_name = namep; 1685 } 1686 1687 /* do all our children */ 1688 child = call_prom("child", 1, 1, node); 1689 while (child != 0) { 1690 scan_dt_build_strings(child, mem_start, mem_end); 1691 child = call_prom("peer", 1, 1, child); 1692 } 1693 } 1694 1695 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, 1696 unsigned long *mem_end) 1697 { 1698 phandle child; 1699 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; 1700 unsigned long soff; 1701 unsigned char *valp; 1702 static char pname[MAX_PROPERTY_NAME]; 1703 int l, room; 1704 1705 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); 1706 1707 /* get the node's full name */ 1708 namep = (char *)*mem_start; 1709 room = *mem_end - *mem_start; 1710 if (room > 255) 1711 room = 255; 1712 l = call_prom("package-to-path", 3, 1, node, namep, room); 1713 if (l >= 0) { 1714 /* Didn't fit? Get more room. */ 1715 if (l >= room) { 1716 if (l >= *mem_end - *mem_start) 1717 namep = make_room(mem_start, mem_end, l+1, 1); 1718 call_prom("package-to-path", 3, 1, node, namep, l); 1719 } 1720 namep[l] = '\0'; 1721 1722 /* Fixup an Apple bug where they have bogus \0 chars in the 1723 * middle of the path in some properties, and extract 1724 * the unit name (everything after the last '/'). 1725 */ 1726 for (lp = p = namep, ep = namep + l; p < ep; p++) { 1727 if (*p == '/') 1728 lp = namep; 1729 else if (*p != 0) 1730 *lp++ = *p; 1731 } 1732 *lp = 0; 1733 *mem_start = _ALIGN((unsigned long)lp + 1, 4); 1734 } 1735 1736 /* get it again for debugging */ 1737 path = RELOC(prom_scratch); 1738 memset(path, 0, PROM_SCRATCH_SIZE); 1739 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); 1740 1741 /* get and store all properties */ 1742 prev_name = RELOC(""); 1743 sstart = (char *)RELOC(dt_string_start); 1744 for (;;) { 1745 if (call_prom("nextprop", 3, 1, node, prev_name, 1746 RELOC(pname)) != 1) 1747 break; 1748 1749 /* skip "name" */ 1750 if (strcmp(RELOC(pname), RELOC("name")) == 0) { 1751 prev_name = RELOC("name"); 1752 continue; 1753 } 1754 1755 /* find string offset */ 1756 soff = dt_find_string(RELOC(pname)); 1757 if (soff == 0) { 1758 prom_printf("WARNING: Can't find string index for" 1759 " <%s>, node %s\n", RELOC(pname), path); 1760 break; 1761 } 1762 prev_name = sstart + soff; 1763 1764 /* get length */ 1765 l = call_prom("getproplen", 2, 1, node, RELOC(pname)); 1766 1767 /* sanity checks */ 1768 if (l == PROM_ERROR) 1769 continue; 1770 if (l > MAX_PROPERTY_LENGTH) { 1771 prom_printf("WARNING: ignoring large property "); 1772 /* It seems OF doesn't null-terminate the path :-( */ 1773 prom_printf("[%s] ", path); 1774 prom_printf("%s length 0x%x\n", RELOC(pname), l); 1775 continue; 1776 } 1777 1778 /* push property head */ 1779 dt_push_token(OF_DT_PROP, mem_start, mem_end); 1780 dt_push_token(l, mem_start, mem_end); 1781 dt_push_token(soff, mem_start, mem_end); 1782 1783 /* push property content */ 1784 valp = make_room(mem_start, mem_end, l, 4); 1785 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); 1786 *mem_start = _ALIGN(*mem_start, 4); 1787 } 1788 1789 /* Add a "linux,phandle" property. */ 1790 soff = dt_find_string(RELOC("linux,phandle")); 1791 if (soff == 0) 1792 prom_printf("WARNING: Can't find string index for" 1793 " <linux-phandle> node %s\n", path); 1794 else { 1795 dt_push_token(OF_DT_PROP, mem_start, mem_end); 1796 dt_push_token(4, mem_start, mem_end); 1797 dt_push_token(soff, mem_start, mem_end); 1798 valp = make_room(mem_start, mem_end, 4, 4); 1799 *(u32 *)valp = node; 1800 } 1801 1802 /* do all our children */ 1803 child = call_prom("child", 1, 1, node); 1804 while (child != 0) { 1805 scan_dt_build_struct(child, mem_start, mem_end); 1806 child = call_prom("peer", 1, 1, child); 1807 } 1808 1809 dt_push_token(OF_DT_END_NODE, mem_start, mem_end); 1810 } 1811 1812 static void __init flatten_device_tree(void) 1813 { 1814 phandle root; 1815 unsigned long mem_start, mem_end, room; 1816 struct boot_param_header *hdr; 1817 struct prom_t *_prom = &RELOC(prom); 1818 char *namep; 1819 u64 *rsvmap; 1820 1821 /* 1822 * Check how much room we have between alloc top & bottom (+/- a 1823 * few pages), crop to 4Mb, as this is our "chuck" size 1824 */ 1825 room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; 1826 if (room > DEVTREE_CHUNK_SIZE) 1827 room = DEVTREE_CHUNK_SIZE; 1828 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); 1829 1830 /* Now try to claim that */ 1831 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); 1832 if (mem_start == 0) 1833 prom_panic("Can't allocate initial device-tree chunk\n"); 1834 mem_end = RELOC(alloc_top); 1835 1836 /* Get root of tree */ 1837 root = call_prom("peer", 1, 1, (phandle)0); 1838 if (root == (phandle)0) 1839 prom_panic ("couldn't get device tree root\n"); 1840 1841 /* Build header and make room for mem rsv map */ 1842 mem_start = _ALIGN(mem_start, 4); 1843 hdr = make_room(&mem_start, &mem_end, 1844 sizeof(struct boot_param_header), 4); 1845 RELOC(dt_header_start) = (unsigned long)hdr; 1846 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); 1847 1848 /* Start of strings */ 1849 mem_start = PAGE_ALIGN(mem_start); 1850 RELOC(dt_string_start) = mem_start; 1851 mem_start += 4; /* hole */ 1852 1853 /* Add "linux,phandle" in there, we'll need it */ 1854 namep = make_room(&mem_start, &mem_end, 16, 1); 1855 strcpy(namep, RELOC("linux,phandle")); 1856 mem_start = (unsigned long)namep + strlen(namep) + 1; 1857 1858 /* Build string array */ 1859 prom_printf("Building dt strings...\n"); 1860 scan_dt_build_strings(root, &mem_start, &mem_end); 1861 RELOC(dt_string_end) = mem_start; 1862 1863 /* Build structure */ 1864 mem_start = PAGE_ALIGN(mem_start); 1865 RELOC(dt_struct_start) = mem_start; 1866 prom_printf("Building dt structure...\n"); 1867 scan_dt_build_struct(root, &mem_start, &mem_end); 1868 dt_push_token(OF_DT_END, &mem_start, &mem_end); 1869 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); 1870 1871 /* Finish header */ 1872 hdr->boot_cpuid_phys = _prom->cpu; 1873 hdr->magic = OF_DT_HEADER; 1874 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); 1875 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); 1876 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); 1877 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); 1878 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); 1879 hdr->version = OF_DT_VERSION; 1880 /* Version 16 is not backward compatible */ 1881 hdr->last_comp_version = 0x10; 1882 1883 /* Copy the reserve map in */ 1884 memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); 1885 1886 #ifdef DEBUG_PROM 1887 { 1888 int i; 1889 prom_printf("reserved memory map:\n"); 1890 for (i = 0; i < RELOC(mem_reserve_cnt); i++) 1891 prom_printf(" %x - %x\n", 1892 RELOC(mem_reserve_map)[i].base, 1893 RELOC(mem_reserve_map)[i].size); 1894 } 1895 #endif 1896 /* Bump mem_reserve_cnt to cause further reservations to fail 1897 * since it's too late. 1898 */ 1899 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; 1900 1901 prom_printf("Device tree strings 0x%x -> 0x%x\n", 1902 RELOC(dt_string_start), RELOC(dt_string_end)); 1903 prom_printf("Device tree struct 0x%x -> 0x%x\n", 1904 RELOC(dt_struct_start), RELOC(dt_struct_end)); 1905 1906 } 1907 1908 #ifdef CONFIG_PPC_MAPLE 1909 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. 1910 * The values are bad, and it doesn't even have the right number of cells. */ 1911 static void __init fixup_device_tree_maple(void) 1912 { 1913 phandle isa; 1914 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ 1915 u32 isa_ranges[6]; 1916 char *name; 1917 1918 name = "/ht@0/isa@4"; 1919 isa = call_prom("finddevice", 1, 1, ADDR(name)); 1920 if (!PHANDLE_VALID(isa)) { 1921 name = "/ht@0/isa@6"; 1922 isa = call_prom("finddevice", 1, 1, ADDR(name)); 1923 rloc = 0x01003000; /* IO space; PCI device = 6 */ 1924 } 1925 if (!PHANDLE_VALID(isa)) 1926 return; 1927 1928 if (prom_getproplen(isa, "ranges") != 12) 1929 return; 1930 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) 1931 == PROM_ERROR) 1932 return; 1933 1934 if (isa_ranges[0] != 0x1 || 1935 isa_ranges[1] != 0xf4000000 || 1936 isa_ranges[2] != 0x00010000) 1937 return; 1938 1939 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); 1940 1941 isa_ranges[0] = 0x1; 1942 isa_ranges[1] = 0x0; 1943 isa_ranges[2] = rloc; 1944 isa_ranges[3] = 0x0; 1945 isa_ranges[4] = 0x0; 1946 isa_ranges[5] = 0x00010000; 1947 prom_setprop(isa, name, "ranges", 1948 isa_ranges, sizeof(isa_ranges)); 1949 } 1950 1951 #define CPC925_MC_START 0xf8000000 1952 #define CPC925_MC_LENGTH 0x1000000 1953 /* The values for memory-controller don't have right number of cells */ 1954 static void __init fixup_device_tree_maple_memory_controller(void) 1955 { 1956 phandle mc; 1957 u32 mc_reg[4]; 1958 char *name = "/hostbridge@f8000000"; 1959 struct prom_t *_prom = &RELOC(prom); 1960 u32 ac, sc; 1961 1962 mc = call_prom("finddevice", 1, 1, ADDR(name)); 1963 if (!PHANDLE_VALID(mc)) 1964 return; 1965 1966 if (prom_getproplen(mc, "reg") != 8) 1967 return; 1968 1969 prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac)); 1970 prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc)); 1971 if ((ac != 2) || (sc != 2)) 1972 return; 1973 1974 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) 1975 return; 1976 1977 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) 1978 return; 1979 1980 prom_printf("Fixing up bogus hostbridge on Maple...\n"); 1981 1982 mc_reg[0] = 0x0; 1983 mc_reg[1] = CPC925_MC_START; 1984 mc_reg[2] = 0x0; 1985 mc_reg[3] = CPC925_MC_LENGTH; 1986 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); 1987 } 1988 #else 1989 #define fixup_device_tree_maple() 1990 #define fixup_device_tree_maple_memory_controller() 1991 #endif 1992 1993 #ifdef CONFIG_PPC_CHRP 1994 /* 1995 * Pegasos and BriQ lacks the "ranges" property in the isa node 1996 * Pegasos needs decimal IRQ 14/15, not hexadecimal 1997 * Pegasos has the IDE configured in legacy mode, but advertised as native 1998 */ 1999 static void __init fixup_device_tree_chrp(void) 2000 { 2001 phandle ph; 2002 u32 prop[6]; 2003 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ 2004 char *name; 2005 int rc; 2006 2007 name = "/pci@80000000/isa@c"; 2008 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2009 if (!PHANDLE_VALID(ph)) { 2010 name = "/pci@ff500000/isa@6"; 2011 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2012 rloc = 0x01003000; /* IO space; PCI device = 6 */ 2013 } 2014 if (PHANDLE_VALID(ph)) { 2015 rc = prom_getproplen(ph, "ranges"); 2016 if (rc == 0 || rc == PROM_ERROR) { 2017 prom_printf("Fixing up missing ISA range on Pegasos...\n"); 2018 2019 prop[0] = 0x1; 2020 prop[1] = 0x0; 2021 prop[2] = rloc; 2022 prop[3] = 0x0; 2023 prop[4] = 0x0; 2024 prop[5] = 0x00010000; 2025 prom_setprop(ph, name, "ranges", prop, sizeof(prop)); 2026 } 2027 } 2028 2029 name = "/pci@80000000/ide@C,1"; 2030 ph = call_prom("finddevice", 1, 1, ADDR(name)); 2031 if (PHANDLE_VALID(ph)) { 2032 prom_printf("Fixing up IDE interrupt on Pegasos...\n"); 2033 prop[0] = 14; 2034 prop[1] = 0x0; 2035 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); 2036 prom_printf("Fixing up IDE class-code on Pegasos...\n"); 2037 rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); 2038 if (rc == sizeof(u32)) { 2039 prop[0] &= ~0x5; 2040 prom_setprop(ph, name, "class-code", prop, sizeof(u32)); 2041 } 2042 } 2043 } 2044 #else 2045 #define fixup_device_tree_chrp() 2046 #endif 2047 2048 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) 2049 static void __init fixup_device_tree_pmac(void) 2050 { 2051 phandle u3, i2c, mpic; 2052 u32 u3_rev; 2053 u32 interrupts[2]; 2054 u32 parent; 2055 2056 /* Some G5s have a missing interrupt definition, fix it up here */ 2057 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); 2058 if (!PHANDLE_VALID(u3)) 2059 return; 2060 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); 2061 if (!PHANDLE_VALID(i2c)) 2062 return; 2063 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); 2064 if (!PHANDLE_VALID(mpic)) 2065 return; 2066 2067 /* check if proper rev of u3 */ 2068 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) 2069 == PROM_ERROR) 2070 return; 2071 if (u3_rev < 0x35 || u3_rev > 0x39) 2072 return; 2073 /* does it need fixup ? */ 2074 if (prom_getproplen(i2c, "interrupts") > 0) 2075 return; 2076 2077 prom_printf("fixing up bogus interrupts for u3 i2c...\n"); 2078 2079 /* interrupt on this revision of u3 is number 0 and level */ 2080 interrupts[0] = 0; 2081 interrupts[1] = 1; 2082 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", 2083 &interrupts, sizeof(interrupts)); 2084 parent = (u32)mpic; 2085 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", 2086 &parent, sizeof(parent)); 2087 } 2088 #else 2089 #define fixup_device_tree_pmac() 2090 #endif 2091 2092 #ifdef CONFIG_PPC_EFIKA 2093 /* 2094 * The MPC5200 FEC driver requires an phy-handle property to tell it how 2095 * to talk to the phy. If the phy-handle property is missing, then this 2096 * function is called to add the appropriate nodes and link it to the 2097 * ethernet node. 2098 */ 2099 static void __init fixup_device_tree_efika_add_phy(void) 2100 { 2101 u32 node; 2102 char prop[64]; 2103 int rv; 2104 2105 /* Check if /builtin/ethernet exists - bail if it doesn't */ 2106 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); 2107 if (!PHANDLE_VALID(node)) 2108 return; 2109 2110 /* Check if the phy-handle property exists - bail if it does */ 2111 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); 2112 if (!rv) 2113 return; 2114 2115 /* 2116 * At this point the ethernet device doesn't have a phy described. 2117 * Now we need to add the missing phy node and linkage 2118 */ 2119 2120 /* Check for an MDIO bus node - if missing then create one */ 2121 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); 2122 if (!PHANDLE_VALID(node)) { 2123 prom_printf("Adding Ethernet MDIO node\n"); 2124 call_prom("interpret", 1, 1, 2125 " s\" /builtin\" find-device" 2126 " new-device" 2127 " 1 encode-int s\" #address-cells\" property" 2128 " 0 encode-int s\" #size-cells\" property" 2129 " s\" mdio\" device-name" 2130 " s\" fsl,mpc5200b-mdio\" encode-string" 2131 " s\" compatible\" property" 2132 " 0xf0003000 0x400 reg" 2133 " 0x2 encode-int" 2134 " 0x5 encode-int encode+" 2135 " 0x3 encode-int encode+" 2136 " s\" interrupts\" property" 2137 " finish-device"); 2138 }; 2139 2140 /* Check for a PHY device node - if missing then create one and 2141 * give it's phandle to the ethernet node */ 2142 node = call_prom("finddevice", 1, 1, 2143 ADDR("/builtin/mdio/ethernet-phy")); 2144 if (!PHANDLE_VALID(node)) { 2145 prom_printf("Adding Ethernet PHY node\n"); 2146 call_prom("interpret", 1, 1, 2147 " s\" /builtin/mdio\" find-device" 2148 " new-device" 2149 " s\" ethernet-phy\" device-name" 2150 " 0x10 encode-int s\" reg\" property" 2151 " my-self" 2152 " ihandle>phandle" 2153 " finish-device" 2154 " s\" /builtin/ethernet\" find-device" 2155 " encode-int" 2156 " s\" phy-handle\" property" 2157 " device-end"); 2158 } 2159 } 2160 2161 static void __init fixup_device_tree_efika(void) 2162 { 2163 int sound_irq[3] = { 2, 2, 0 }; 2164 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, 2165 3,4,0, 3,5,0, 3,6,0, 3,7,0, 2166 3,8,0, 3,9,0, 3,10,0, 3,11,0, 2167 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; 2168 u32 node; 2169 char prop[64]; 2170 int rv, len; 2171 2172 /* Check if we're really running on a EFIKA */ 2173 node = call_prom("finddevice", 1, 1, ADDR("/")); 2174 if (!PHANDLE_VALID(node)) 2175 return; 2176 2177 rv = prom_getprop(node, "model", prop, sizeof(prop)); 2178 if (rv == PROM_ERROR) 2179 return; 2180 if (strcmp(prop, "EFIKA5K2")) 2181 return; 2182 2183 prom_printf("Applying EFIKA device tree fixups\n"); 2184 2185 /* Claiming to be 'chrp' is death */ 2186 node = call_prom("finddevice", 1, 1, ADDR("/")); 2187 rv = prom_getprop(node, "device_type", prop, sizeof(prop)); 2188 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) 2189 prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); 2190 2191 /* CODEGEN,description is exposed in /proc/cpuinfo so 2192 fix that too */ 2193 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); 2194 if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) 2195 prom_setprop(node, "/", "CODEGEN,description", 2196 "Efika 5200B PowerPC System", 2197 sizeof("Efika 5200B PowerPC System")); 2198 2199 /* Fixup bestcomm interrupts property */ 2200 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); 2201 if (PHANDLE_VALID(node)) { 2202 len = prom_getproplen(node, "interrupts"); 2203 if (len == 12) { 2204 prom_printf("Fixing bestcomm interrupts property\n"); 2205 prom_setprop(node, "/builtin/bestcom", "interrupts", 2206 bcomm_irq, sizeof(bcomm_irq)); 2207 } 2208 } 2209 2210 /* Fixup sound interrupts property */ 2211 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); 2212 if (PHANDLE_VALID(node)) { 2213 rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); 2214 if (rv == PROM_ERROR) { 2215 prom_printf("Adding sound interrupts property\n"); 2216 prom_setprop(node, "/builtin/sound", "interrupts", 2217 sound_irq, sizeof(sound_irq)); 2218 } 2219 } 2220 2221 /* Make sure ethernet phy-handle property exists */ 2222 fixup_device_tree_efika_add_phy(); 2223 } 2224 #else 2225 #define fixup_device_tree_efika() 2226 #endif 2227 2228 static void __init fixup_device_tree(void) 2229 { 2230 fixup_device_tree_maple(); 2231 fixup_device_tree_maple_memory_controller(); 2232 fixup_device_tree_chrp(); 2233 fixup_device_tree_pmac(); 2234 fixup_device_tree_efika(); 2235 } 2236 2237 static void __init prom_find_boot_cpu(void) 2238 { 2239 struct prom_t *_prom = &RELOC(prom); 2240 u32 getprop_rval; 2241 ihandle prom_cpu; 2242 phandle cpu_pkg; 2243 2244 _prom->cpu = 0; 2245 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) 2246 return; 2247 2248 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); 2249 2250 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); 2251 _prom->cpu = getprop_rval; 2252 2253 prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); 2254 } 2255 2256 static void __init prom_check_initrd(unsigned long r3, unsigned long r4) 2257 { 2258 #ifdef CONFIG_BLK_DEV_INITRD 2259 struct prom_t *_prom = &RELOC(prom); 2260 2261 if (r3 && r4 && r4 != 0xdeadbeef) { 2262 unsigned long val; 2263 2264 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; 2265 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; 2266 2267 val = RELOC(prom_initrd_start); 2268 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", 2269 &val, sizeof(val)); 2270 val = RELOC(prom_initrd_end); 2271 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", 2272 &val, sizeof(val)); 2273 2274 reserve_mem(RELOC(prom_initrd_start), 2275 RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); 2276 2277 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); 2278 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); 2279 } 2280 #endif /* CONFIG_BLK_DEV_INITRD */ 2281 } 2282 2283 /* 2284 * We enter here early on, when the Open Firmware prom is still 2285 * handling exceptions and the MMU hash table for us. 2286 */ 2287 2288 unsigned long __init prom_init(unsigned long r3, unsigned long r4, 2289 unsigned long pp, 2290 unsigned long r6, unsigned long r7, 2291 unsigned long kbase) 2292 { 2293 struct prom_t *_prom; 2294 unsigned long hdr; 2295 2296 #ifdef CONFIG_PPC32 2297 unsigned long offset = reloc_offset(); 2298 reloc_got2(offset); 2299 #endif 2300 2301 _prom = &RELOC(prom); 2302 2303 /* 2304 * First zero the BSS 2305 */ 2306 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); 2307 2308 /* 2309 * Init interface to Open Firmware, get some node references, 2310 * like /chosen 2311 */ 2312 prom_init_client_services(pp); 2313 2314 /* 2315 * See if this OF is old enough that we need to do explicit maps 2316 * and other workarounds 2317 */ 2318 prom_find_mmu(); 2319 2320 /* 2321 * Init prom stdout device 2322 */ 2323 prom_init_stdout(); 2324 2325 prom_printf("Preparing to boot %s", RELOC(linux_banner)); 2326 2327 /* 2328 * Get default machine type. At this point, we do not differentiate 2329 * between pSeries SMP and pSeries LPAR 2330 */ 2331 RELOC(of_platform) = prom_find_machine_type(); 2332 2333 #ifndef CONFIG_RELOCATABLE 2334 /* Bail if this is a kdump kernel. */ 2335 if (PHYSICAL_START > 0) 2336 prom_panic("Error: You can't boot a kdump kernel from OF!\n"); 2337 #endif 2338 2339 /* 2340 * Check for an initrd 2341 */ 2342 prom_check_initrd(r3, r4); 2343 2344 #ifdef CONFIG_PPC_PSERIES 2345 /* 2346 * On pSeries, inform the firmware about our capabilities 2347 */ 2348 if (RELOC(of_platform) == PLATFORM_PSERIES || 2349 RELOC(of_platform) == PLATFORM_PSERIES_LPAR) 2350 prom_send_capabilities(); 2351 #endif 2352 2353 /* 2354 * Copy the CPU hold code 2355 */ 2356 if (RELOC(of_platform) != PLATFORM_POWERMAC) 2357 copy_and_flush(0, kbase, 0x100, 0); 2358 2359 /* 2360 * Do early parsing of command line 2361 */ 2362 early_cmdline_parse(); 2363 2364 /* 2365 * Initialize memory management within prom_init 2366 */ 2367 prom_init_mem(); 2368 2369 /* 2370 * Determine which cpu is actually running right _now_ 2371 */ 2372 prom_find_boot_cpu(); 2373 2374 /* 2375 * Initialize display devices 2376 */ 2377 prom_check_displays(); 2378 2379 #ifdef CONFIG_PPC64 2380 /* 2381 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else 2382 * that uses the allocator, we need to make sure we get the top of memory 2383 * available for us here... 2384 */ 2385 if (RELOC(of_platform) == PLATFORM_PSERIES) 2386 prom_initialize_tce_table(); 2387 #endif 2388 2389 /* 2390 * On non-powermacs, try to instantiate RTAS and puts all CPUs 2391 * in spin-loops. PowerMacs don't have a working RTAS and use 2392 * a different way to spin CPUs 2393 */ 2394 if (RELOC(of_platform) != PLATFORM_POWERMAC) { 2395 prom_instantiate_rtas(); 2396 prom_hold_cpus(); 2397 } 2398 2399 /* 2400 * Fill in some infos for use by the kernel later on 2401 */ 2402 #ifdef CONFIG_PPC64 2403 if (RELOC(prom_iommu_off)) 2404 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", 2405 NULL, 0); 2406 2407 if (RELOC(prom_iommu_force_on)) 2408 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", 2409 NULL, 0); 2410 2411 if (RELOC(prom_tce_alloc_start)) { 2412 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", 2413 &RELOC(prom_tce_alloc_start), 2414 sizeof(prom_tce_alloc_start)); 2415 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", 2416 &RELOC(prom_tce_alloc_end), 2417 sizeof(prom_tce_alloc_end)); 2418 } 2419 #endif 2420 2421 /* 2422 * Fixup any known bugs in the device-tree 2423 */ 2424 fixup_device_tree(); 2425 2426 /* 2427 * Now finally create the flattened device-tree 2428 */ 2429 prom_printf("copying OF device tree...\n"); 2430 flatten_device_tree(); 2431 2432 /* 2433 * in case stdin is USB and still active on IBM machines... 2434 * Unfortunately quiesce crashes on some powermacs if we have 2435 * closed stdin already (in particular the powerbook 101). 2436 */ 2437 if (RELOC(of_platform) != PLATFORM_POWERMAC) 2438 prom_close_stdin(); 2439 2440 /* 2441 * Call OF "quiesce" method to shut down pending DMA's from 2442 * devices etc... 2443 */ 2444 prom_printf("Calling quiesce...\n"); 2445 call_prom("quiesce", 0, 0); 2446 2447 /* 2448 * And finally, call the kernel passing it the flattened device 2449 * tree and NULL as r5, thus triggering the new entry point which 2450 * is common to us and kexec 2451 */ 2452 hdr = RELOC(dt_header_start); 2453 prom_printf("returning from prom_init\n"); 2454 prom_debug("->dt_header_start=0x%x\n", hdr); 2455 2456 #ifdef CONFIG_PPC32 2457 reloc_got2(-offset); 2458 #endif 2459 2460 __start(hdr, kbase, 0); 2461 2462 return 0; 2463 } 2464