console.c revision 8022
1/* 2 * Copyright (c) 2003, 2004 3 * The Regents of The University of Michigan 4 * All Rights Reserved 5 * 6 * This code is part of the M5 simulator, developed by Nathan Binkert, 7 * Erik Hallnor, Steve Raasch, and Steve Reinhardt, with contributions 8 * from Ron Dreslinski, Dave Greene, Lisa Hsu, Ali Saidi, and Andrew 9 * Schultz. 10 * 11 * Permission is granted to use, copy, create derivative works and 12 * redistribute this software and such derivative works for any purpose, 13 * so long as the copyright notice above, this grant of permission, and 14 * the disclaimer below appear in all copies made; and so long as the 15 * name of The University of Michigan is not used in any advertising or 16 * publicity pertaining to the use or distribution of this software 17 * without specific, written prior authorization. 18 * 19 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE 20 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND WITHOUT 21 * WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER EXPRESS OR 22 * IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE REGENTS OF 24 * THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE FOR ANY DAMAGES, 25 * INCLUDING DIRECT, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL 26 * DAMAGES, WITH RESPECT TO ANY CLAIM ARISING OUT OF OR IN CONNECTION 27 * WITH THE USE OF THE SOFTWARE, EVEN IF IT HAS BEEN OR IS HEREAFTER 28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 29 */ 30 31/* 32 * Copyright 1993 Hewlett-Packard Development Company, L.P. 33 * 34 * Permission is hereby granted, free of charge, to any person 35 * obtaining a copy of this software and associated documentation 36 * files (the "Software"), to deal in the Software without 37 * restriction, including without limitation the rights to use, copy, 38 * modify, merge, publish, distribute, sublicense, and/or sell copies 39 * of the Software, and to permit persons to whom the Software is 40 * furnished to do so, subject to the following conditions: 41 * 42 * The above copyright notice and this permission notice shall be 43 * included in all copies or substantial portions of the Software. 44 * 45 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 46 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 47 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 48 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 49 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 50 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 51 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 52 * SOFTWARE. 53 */ 54 55/* ****************************************** 56 * M5 Console 57 * ******************************************/ 58 59#include <linux/stddef.h> 60#include <sys/types.h> 61 62#define CONSOLE 63#include "alpha_access.h" 64#include "cserve.h" 65#include "rpb.h" 66 67#define CONS_INT_TX 0x01 /* interrupt enable / state bits */ 68#define CONS_INT_RX 0x02 69 70#define PAGE_SIZE (8192) 71 72#define KSTACK_REGION_VA 0x20040000 73 74#define KSEG 0xfffffc0000000000 75#define K1BASE 0xfffffc8000000000 76#define KSEG_TO_PHYS(x) (((ulong)x) & ~KSEG) 77 78#define ROUNDUP8(x) ((ulong)(((ulong)x)+7) & ~7) 79#define ROUNDUP128(x) ((ulong)(((ulong)x) + 127) & ~127) 80#define ROUNDUP8K(x) ((ulong)(((ulong)(x)) + 8191) & ~8191) 81 82#define FIRST(x) ((((ulong)(x)) >> 33) & 0x3ff) 83#define SECOND(x) ((((ulong)(x)) >> 23) & 0x3ff) 84#define THIRD(x) ((((ulong)(x)) >> 13) & 0x3ff) 85#define THIRD_XXX(x) ((((ulong)(x)) >> 13) & 0xfff) 86#define PFN(x) ((((ulong)(x) & ~KSEG) >> 13)) 87 88/* Kernel write | kernel read | valid */ 89#define KPTE(x) ((ulong)((((ulong)(x)) << 32) | 0x1101)) 90 91#define HWRPB_PAGES 16 92#define MDT_BITMAP_PAGES 4 93 94#define NUM_KERNEL_THIRD (4) 95 96#define printf_lock(args...) \ 97 do { \ 98 SpinLock(&theLock); \ 99 printf(args); \ 100 SpinUnlock(&theLock); \ 101 } while (0) 102 103 104void unixBoot(int argc, char **argv); 105void JToKern(char *bootadr, ulong rpb_percpu, ulong free_pfn, ulong k_argc, 106 char **k_argv, char **envp); 107void JToPal(ulong bootadr); 108void SlaveLoop(int cpu); 109 110volatile struct AlphaAccess *m5AlphaAccess; 111struct AlphaAccess m5Conf; 112 113ulong theLock; 114 115extern void SpinLock(ulong *lock); 116#define SpinUnlock(_x) *(_x) = 0; 117 118struct _kernel_params { 119 char *bootadr; 120 ulong rpb_percpu; 121 ulong free_pfn; 122 ulong argc; 123 ulong argv; 124 ulong envp; /* NULL */ 125}; 126 127extern consoleCallback[]; 128extern consoleFixup[]; 129long CallBackDispatcher(); 130long CallBackFixup(); 131 132/* 133 * m5 console output 134 */ 135 136void 137InitConsole() 138{ 139} 140 141char 142GetChar() 143{ 144 return m5AlphaAccess->inputChar; 145} 146 147void 148PutChar(char c) 149{ 150 m5AlphaAccess->outputChar = c; 151} 152 153int 154passArgs(int argc) 155{ 156 return 0; 157} 158 159int 160main(int argc, char **argv) 161{ 162 int x, i; 163 uint *k1ptr, *ksegptr; 164 165 InitConsole(); 166 printf_lock("M5 console: m5AlphaAccess @ 0x%x\n", m5AlphaAccess); 167 168 /* 169 * get configuration from backdoor 170 */ 171 m5Conf.last_offset = m5AlphaAccess->last_offset; 172 printf_lock("Got Configuration %d\n", m5Conf.last_offset); 173 174 m5Conf.last_offset = m5AlphaAccess->last_offset; 175 m5Conf.version = m5AlphaAccess->version; 176 m5Conf.numCPUs = m5AlphaAccess->numCPUs; 177 m5Conf.intrClockFrequency = m5AlphaAccess->intrClockFrequency; 178 m5Conf.cpuClock = m5AlphaAccess->cpuClock; 179 m5Conf.mem_size = m5AlphaAccess->mem_size; 180 m5Conf.kernStart = m5AlphaAccess->kernStart; 181 m5Conf.kernEnd = m5AlphaAccess->kernEnd; 182 m5Conf.entryPoint = m5AlphaAccess->entryPoint; 183 m5Conf.diskUnit = m5AlphaAccess->diskUnit; 184 m5Conf.diskCount = m5AlphaAccess->diskCount; 185 m5Conf.diskPAddr = m5AlphaAccess->diskPAddr; 186 m5Conf.diskBlock = m5AlphaAccess->diskBlock; 187 m5Conf.diskOperation = m5AlphaAccess->diskOperation; 188 m5Conf.outputChar = m5AlphaAccess->outputChar; 189 m5Conf.inputChar = m5AlphaAccess->inputChar; 190 m5Conf.bootStrapImpure = m5AlphaAccess->bootStrapImpure; 191 m5Conf.bootStrapCPU = m5AlphaAccess->bootStrapCPU; 192 193 if (m5Conf.version != ALPHA_ACCESS_VERSION) { 194 panic("Console version mismatch. Console expects %d. has %d \n", 195 ALPHA_ACCESS_VERSION, m5Conf.version); 196 } 197 198 /* 199 * setup arguments to kernel 200 */ 201 unixBoot(argc, argv); 202 203 panic("unix failed to boot\n"); 204 return 1; 205} 206 207/* 208 * BOOTING 209 */ 210struct rpb m5_rpb = { 211 NULL, /* 000: physical self-reference */ 212 ((long)'H') | (((long)'W') << 8) | (((long)'R') << 16) | 213 ((long)'P' << 24) | (((long)'B') << 32), /* 008: contains "HWRPB" */ 214 6, /* 010: HWRPB version number */ 215 /* the byte count is wrong, but who needs it? - lance */ 216 0, /* 018: bytes in RPB perCPU CTB CRB MEDSC */ 217 0, /* 020: primary cpu id */ 218 PAGE_SIZE, /* 028: page size in bytes */ 219 43, /* 030: number of phys addr bits */ 220 127, /* 038: max valid ASN */ 221 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','1'}, 222 /* 040: system serial num: 10 ascii chars */ 223 0, /* OVERRIDDEN */ 224 (1<<10), /* 058: system variation */ 225 'c'|('o'<<8)|('o'<<16)|('l'<< 24), /* 060: system revision */ 226 1024*4096, /* 068: scaled interval clock intr freq */ 227 0, /* 070: cycle counter frequency */ 228 0x200000000, /* 078: virtual page table base */ 229 0, /* 080: reserved */ 230 0, /* 088: offset to translation buffer hint */ 231 1, /* 090: number of processor slots OVERRIDDEN*/ 232 sizeof(struct rpb_percpu), /* 098: per-cpu slot size. OVERRIDDEN */ 233 0, /* 0A0: offset to per_cpu slots */ 234 1, /* 0A8: number of CTBs */ 235 sizeof(struct ctb_tt), 236 0, /* 0B8: offset to CTB (cons term block) */ 237 0, /* 0C0: offset to CRB (cons routine block) */ 238 0, /* 0C8: offset to memory descriptor table */ 239 0, /* 0D0: offset to config data block */ 240 0, /* 0D8: offset to FRU table */ 241 0, /* 0E0: virt addr of save term routine */ 242 0, /* 0E8: proc value for save term routine */ 243 0, /* 0F0: virt addr of restore term routine */ 244 0, /* 0F8: proc value for restore term routine */ 245 0, /* 100: virt addr of CPU restart routine */ 246 0, /* 108: proc value for CPU restart routine */ 247 0, /* 110: used to determine presence of kdebug */ 248 0, /* 118: reserved for hardware */ 249/* the checksum is wrong, but who needs it? - lance */ 250 0, /* 120: checksum of prior entries in rpb */ 251 0, /* 128: receive ready bitmask */ 252 0, /* 130: transmit ready bitmask */ 253 0, /* 138: Dynamic System Recog. offset */ 254}; 255 256ulong m5_tbb[] = { 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 257 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 258 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e, 259 0x1e1e1e1e1e1e1e1e, 0x1e1e1e1e1e1e1e1e }; 260 261struct rpb_percpu m5_rpb_percpu = { 262 {0,0,0,0,0,0,1,{0,0},{0,0,0,0,0,0,0,0}}, /* 000: boot/restart HWPCB */ 263 (STATE_PA | STATE_PP | STATE_CV | 264 STATE_PV | STATE_PMV | STATE_PL), /* 080: per-cpu state bits */ 265 0xc000, /* 088: palcode memory length */ 266 0x2000, /* 090: palcode scratch length */ 267 0x4000, /* 098: paddr of pal mem space */ 268 0x2000, /* 0A0: paddr of pal scratch space */ 269 (2 << 16) | (5 << 8) | 1, /* 0A8: PALcode rev required */ 270 11 | (2L << 32), /* 0B0: processor type */ 271 7, /* 0B8: processor variation */ 272 'M'|('5'<<8)|('A'<<16)|('0'<<24), /* 0C0: processor revision */ 273 {'M','5','/','A','l','p','h','a','0','0','0','0','0','0','0','0'}, 274 /* 0C8: proc serial num: 10 chars */ 275 0, /* 0D8: phys addr of logout area */ 276 0, /* 0E0: len in bytes of logout area */ 277 0, /* 0E8: halt pcb base */ 278 0, /* 0F0: halt pc */ 279 0, /* 0F8: halt ps */ 280 0, /* 100: halt arg list (R25) */ 281 0, /* 108: halt return address (R26) */ 282 0, /* 110: halt procedure value (R27) */ 283 0, /* 118: reason for halt */ 284 0, /* 120: for software */ 285 {0}, /* 128: inter-console comm buffer */ 286 {1,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0}, /* 1D0: PALcode revs available */ 287 0 /* 250: reserved for arch use */ 288/* the dump stack grows from the end of the rpb page not to reach here */ 289}; 290 291struct _m5_rpb_mdt { 292 long rpb_checksum; /* 000: checksum of entire mem desc table */ 293 long rpb_impaddr; /* 008: PA of implementation dep info */ 294 long rpb_numcl; /* 010: number of clusters */ 295 struct rpb_cluster rpb_cluster[3]; /* first instance of a cluster */ 296}; 297 298struct _m5_rpb_mdt m5_rpb_mdt = { 299 0, /* 000: checksum of entire mem desc table */ 300 0, /* 008: PA of implementation dep info */ 301 0, /* 010: number of clusters */ 302 {{ 0, /* 000: starting PFN of this cluster */ 303 0, /* 008: count of PFNs in this cluster */ 304 0, /* 010: count of tested PFNs in cluster */ 305 0, /* 018: va of bitmap */ 306 0, /* 020: pa of bitmap */ 307 0, /* 028: checksum of bitmap */ 308 1 /* 030: usage of cluster */ 309 }, 310 { 0, /* 000: starting PFN of this cluster */ 311 0, /* 008: count of PFNs in this cluster */ 312 0, /* 010: count of tested PFNs in cluster */ 313 0, /* 018: va of bitmap */ 314 0, /* 020: pa of bitmap */ 315 0, /* 028: checksum of bitmap */ 316 0 /* 030: usage of cluster */ 317 }, 318 { 0, /* 000: starting PFN of this cluster */ 319 0, /* 008: count of PFNs in this cluster */ 320 0, /* 010: count of tested PFNs in cluster */ 321 0, /* 018: va of bitmap */ 322 0, /* 020: pa of bitmap */ 323 0, /* 028: checksum of bitmap */ 324 0 /* 030: usage of cluster */ 325 }} 326}; 327 328/* constants for slotinfo bus_type subfield */ 329#define SLOTINFO_TC 0 330#define SLOTINFO_ISA 1 331#define SLOTINFO_EISA 2 332#define SLOTINFO_PCI 3 333 334struct rpb_ctb m5_rpb_ctb = { 335 CONS_DZ, /* 000: console type */ 336 0, /* 008: console unit */ 337 0, /* 010: reserved */ 338 0 /* 018: byte length of device dep portion */ 339}; 340 341/* we don't do any fixup (aka relocate the console) - we hope */ 342struct rpb_crb m5_rpb_crb = { 343 0, /* va of call-back dispatch rtn */ 344 0, /* pa of call-back dispatch rtn */ 345 0, /* va of call-back fixup rtn */ 346 0, /* pa of call-back fixup rtn */ 347 0, /* number of entries in phys/virt map */ 348 0 /* Number of pages to be mapped */ 349}; 350 351struct _rpb_name { 352 ulong length; 353 char name[16]; 354}; 355 356extern struct _rpb_name m5_name; 357 358struct rpb_dsr m5_rpb_dsr = { 359 0, 360 0, 361 0, 362}; 363 364struct _rpb_name m5_name = { 365 16, 366 {'U','M','I','C','H',' ','M','5','/','A','L','P','H','A',' ',0}, 367}; 368 369/* 370 * M5 has one LURT entry: 371 * 1050 is for workstations 372 * 1100 is servers (and is needed for CXX) 373 */ 374long m5_lurt[10] = { 9, 12, -1, -1, -1, -1, -1, -1, 1100, 1100 }; 375 376ulong unix_boot_mem; 377ulong bootadr; 378 379char **kargv; 380int kargc; 381ulong free_pfn; 382struct rpb_percpu *rpb_percpu; 383 384char * 385unix_boot_alloc(int pages) 386{ 387 char *ret = (char *)unix_boot_mem; 388 unix_boot_mem += (pages * PAGE_SIZE); 389 return ret; 390} 391 392ulong *first = 0; 393ulong *third_rpb = 0; 394ulong *reservedFixup = 0; 395 396int strcpy(char *dst, char *src); 397 398struct rpb *rpb; 399extern ulong _end; 400 401void 402unixBoot(int argc, char **argv) 403{ 404 ulong *second, *third_kernel, ptr, *tbb, size, *percpu_logout; 405 unsigned char *mdt_bitmap; 406 long *lp1, *lp2, sum; 407 int i, cl; 408 int kern_first_page; 409 int mem_size = m5Conf.mem_size; 410 411 int mem_pages = mem_size / PAGE_SIZE, cons_pages; 412 ulong kernel_bytes, ksp, kernel_end, *unix_kernel_stack, bss, 413 ksp_bottom, ksp_top; 414 struct rpb_ctb *rpb_ctb; 415 struct ctb_tt *ctb_tt; 416 struct rpb_dsr *rpb_dsr; 417 struct rpb_crb *rpb_crb; 418 struct _m5_rpb_mdt *rpb_mdt; 419 int *rpb_lurt; 420 char *rpb_name; 421 ulong nextPtr; 422 423 printf_lock("memsize %x pages %x \n", mem_size, mem_pages); 424 425 /* Allocate: 426 * two pages for the HWRPB 427 * five page table pages: 428 * 1: First level page table 429 * 1: Second level page table 430 * 1: Third level page table for HWRPB 431 * 2: Third level page table for kernel (for up to 16MB) 432 * set up the page tables 433 * load the kernel at the physical address 0x230000 434 * build the HWRPB 435 * set up memory descriptor table to give up the 436 * physical memory between the end of the page 437 * tables and the start of the kernel 438 * enable kseg addressing 439 * jump to the kernel 440 */ 441 442 unix_boot_mem = ROUNDUP8K(&_end); 443 444 printf_lock("First free page after ROM 0x%x\n", unix_boot_mem); 445 446 rpb = (struct rpb *)unix_boot_alloc(HWRPB_PAGES); 447 448 mdt_bitmap = (unsigned char *)unix_boot_alloc(MDT_BITMAP_PAGES); 449 first = (ulong *)unix_boot_alloc(1); 450 second = (ulong *)unix_boot_alloc(1); 451 third_rpb = (ulong *)unix_boot_alloc(1); 452 reservedFixup = (ulong*) unix_boot_alloc(1); 453 third_kernel = (ulong *)unix_boot_alloc(NUM_KERNEL_THIRD); 454 percpu_logout = (ulong*)unix_boot_alloc(1); 455 456 cons_pages = KSEG_TO_PHYS(unix_boot_mem) / PAGE_SIZE; 457 458 /* Set up the page tables */ 459 bzero((char *)first, PAGE_SIZE); 460 bzero((char *)second, PAGE_SIZE); 461 bzero((char *)reservedFixup, PAGE_SIZE); 462 bzero((char *)third_rpb, HWRPB_PAGES * PAGE_SIZE); 463 bzero((char *)third_kernel, PAGE_SIZE * NUM_KERNEL_THIRD); 464 465 first[0] = KPTE(PFN(second)); 466 first[1] = KPTE(PFN(first)); /* Region 3 */ 467 468 /* Region 0 */ 469 second[SECOND(0x10000000)] = KPTE(PFN(third_rpb)); 470 471 for (i = 0; i < NUM_KERNEL_THIRD; i++) { 472 /* Region 1 */ 473 second[SECOND(0x20000000) + i] = KPTE(PFN(third_kernel) + i); 474 } 475 476 /* Region 2 */ 477 second[SECOND(0x40000000)] = KPTE(PFN(second)); 478 479 480 /* For some obscure reason, Dec Unix's database read 481 * from /etc/sysconfigtab is written to this fixed 482 * mapped memory location. Go figure, since it is 483 * not initialized by the console. Maybe it is 484 * to look at the database from the console 485 * after a boot/crash. 486 * 487 * Black magic to estimate the max size. SEGVs on overflow 488 * bugnion 489 */ 490 491#define DATABASE_BASE 0x20000000 492#define DATABASE_END 0x20020000 493 494 ulong *dbPage = (ulong*)unix_boot_alloc(1); 495 bzero(dbPage, PAGE_SIZE); 496 second[SECOND(DATABASE_BASE)] = KPTE(PFN(dbPage)); 497 for (i = DATABASE_BASE; i < DATABASE_END ; i += PAGE_SIZE) { 498 ulong *db = (ulong*)unix_boot_alloc(1); 499 dbPage[THIRD(i)] = KPTE(PFN(db)); 500 } 501 502 /* Region 0 */ 503 /* Map the HWRPB */ 504 for (i = 0; i < HWRPB_PAGES; i++) 505 third_rpb[i] = KPTE(PFN(rpb) + i); 506 507 /* Map the MDT bitmap table */ 508 for (i = 0; i < MDT_BITMAP_PAGES; i++) { 509 third_rpb[HWRPB_PAGES + i] = KPTE(PFN(mdt_bitmap) + i); 510 } 511 512 /* Protect the PAL pages */ 513 for (i = 1; i < PFN(first); i++) 514 third_rpb[HWRPB_PAGES + MDT_BITMAP_PAGES + i] = KPTE(i); 515 516 /* Set up third_kernel after it's loaded, when we know where it is */ 517 kern_first_page = (KSEG_TO_PHYS(m5Conf.kernStart)/PAGE_SIZE); 518 kernel_end = ROUNDUP8K(m5Conf.kernEnd); 519 bootadr = m5Conf.entryPoint; 520 521 printf_lock("HWRPB 0x%x l1pt 0x%x l2pt 0x%x l3pt_rpb 0x%x l3pt_kernel 0x%x" 522 " l2reserv 0x%x\n", 523 rpb, first, second, third_rpb, third_kernel, reservedFixup); 524 if (kernel_end - m5Conf.kernStart > (0x800000*NUM_KERNEL_THIRD)) { 525 printf_lock("Kernel is more than 8MB 0x%x - 0x%x = 0x%x\n", 526 kernel_end, m5Conf.kernStart, 527 kernel_end - m5Conf.kernStart ); 528 panic("kernel too big\n"); 529 } 530 printf_lock("kstart = 0x%x, kend = 0x%x, kentry = 0x%x, numCPUs = 0x%x\n", m5Conf.kernStart, m5Conf.kernEnd, m5Conf.entryPoint, m5Conf.numCPUs); 531 ksp_bottom = (ulong)unix_boot_alloc(1); 532 ksp_top = ksp_bottom + PAGE_SIZE; 533 ptr = (ulong) ksp_bottom; 534 bzero((char *)ptr, PAGE_SIZE); 535 dbPage[THIRD(KSTACK_REGION_VA)] = 0; /* Stack Guard Page */ 536 dbPage[THIRD(KSTACK_REGION_VA + PAGE_SIZE)] = KPTE(PFN(ptr)); /* Kernel Stack Page */ 537 dbPage[THIRD(KSTACK_REGION_VA + 2*PAGE_SIZE)] = 0; /* Stack Guard Page */ 538 539 /* put argv into the bottom of the stack - argv starts at 1 because 540 * the command thatr got us here (i.e. "unixboot) is in argv[0]. 541 */ 542 ksp = ksp_top - 8; /* Back up one longword */ 543 ksp -= argc * sizeof(char *); /* Make room for argv */ 544 kargv = (char **) ksp; 545 for (i = 1; i < argc; i++) { /* Copy arguments to stack */ 546 ksp -= ((strlen(argv[i]) + 1) + 7) & ~0x7; 547 kargv[i-1] = (char *) ksp; 548 strcpy(kargv[i - 1], argv[i]); 549 } 550 kargc = i - 1; 551 kargv[kargc] = NULL; /* just to be sure; doesn't seem to be used */ 552 ksp -= sizeof(char *); /* point above last arg for no real reason */ 553 554 free_pfn = PFN(kernel_end); 555 556 bcopy((char *)&m5_rpb, (char *)rpb, sizeof(struct rpb)); 557 558 rpb->rpb_selfref = (struct rpb *) KSEG_TO_PHYS(rpb); 559 rpb->rpb_string = 0x0000004250525748; 560 561 tbb = (ulong *) (((char *) rpb) + ROUNDUP8(sizeof(struct rpb))); 562 rpb->rpb_trans_off = (ulong)tbb - (ulong)rpb; 563 bcopy((char *)m5_tbb, (char *)tbb, sizeof(m5_tbb)); 564 565 /* 566 * rpb_counter. Use to determine timeouts in OS. 567 * XXX must be patched after a checkpoint restore (I guess) 568 */ 569 570 printf_lock("CPU Clock at %d MHz IntrClockFrequency=%d \n", 571 m5Conf.cpuClock, m5Conf.intrClockFrequency); 572 rpb->rpb_counter = m5Conf.cpuClock * 1000 * 1000; 573 574 /* 575 * By definition, the rpb_clock is scaled by 4096 (in hz) 576 */ 577 rpb->rpb_clock = m5Conf.intrClockFrequency * 4096; 578 579 /* 580 * Per CPU Slots. Multiprocessor support. 581 */ 582 int percpu_size = ROUNDUP128(sizeof(struct rpb_percpu)); 583 584 printf_lock("Booting with %d processor(s) \n", m5Conf.numCPUs); 585 586 rpb->rpb_numprocs = m5Conf.numCPUs; 587 rpb->rpb_slotsize = percpu_size; 588 rpb_percpu = (struct rpb_percpu *) 589 ROUNDUP128(((ulong)tbb) + (sizeof(m5_tbb))); 590 591 rpb->rpb_percpu_off = (ulong)rpb_percpu - (ulong)rpb; 592 593 for (i = 0; i < m5Conf.numCPUs; i++) { 594 struct rpb_percpu *thisCPU = (struct rpb_percpu*) 595 ((ulong)rpb_percpu + percpu_size * i); 596 597 bzero((char *)thisCPU, percpu_size); 598 bcopy((char *)&m5_rpb_percpu, (char *)thisCPU, 599 sizeof(struct rpb_percpu)); 600 601 thisCPU->rpb_pcb.rpb_ksp = (KSTACK_REGION_VA + 2*PAGE_SIZE - (ksp_top - ksp)); 602 thisCPU->rpb_pcb.rpb_ptbr = PFN(first); 603 604 thisCPU->rpb_logout = KSEG_TO_PHYS(percpu_logout); 605 thisCPU->rpb_logout_len = PAGE_SIZE; 606 607 printf_lock("KSP: 0x%x PTBR 0x%x\n", 608 thisCPU->rpb_pcb.rpb_ksp, thisCPU->rpb_pcb.rpb_ptbr); 609 } 610 611 nextPtr = (ulong)rpb_percpu + percpu_size * m5Conf.numCPUs; 612 613 /* 614 * Console Terminal Block 615 */ 616 rpb_ctb = (struct rpb_ctb *) nextPtr; 617 ctb_tt = (struct ctb_tt*) rpb_ctb; 618 619 rpb->rpb_ctb_off = ((ulong)rpb_ctb) - (ulong)rpb; 620 rpb->rpb_ctb_size = sizeof(struct rpb_ctb); 621 622 bzero((char *)rpb_ctb, sizeof(struct ctb_tt)); 623 624 rpb_ctb->rpb_type = CONS_DZ; 625 rpb_ctb->rpb_length = sizeof(ctb_tt) - sizeof(rpb_ctb); 626 627 /* 628 * uart initizliation 629 */ 630 ctb_tt->ctb_tintr_vec = 0x6c0; /* matches tlaser pal code */ 631 ctb_tt->ctb_rintr_vec = 0x680; /* matches tlaser pal code */ 632 ctb_tt->ctb_term_type = CTB_GRAPHICS; 633 634 rpb_crb = (struct rpb_crb *) (((ulong)rpb_ctb) + sizeof(struct ctb_tt)); 635 rpb->rpb_crb_off = ((ulong)rpb_crb) - (ulong)rpb; 636 637 bzero((char *)rpb_crb, sizeof(struct rpb_crb)); 638 639 /* 640 * console callback stuff (m5) 641 */ 642 rpb_crb->rpb_num = 1; 643 rpb_crb->rpb_mapped_pages = HWRPB_PAGES; 644 rpb_crb->rpb_map[0].rpb_virt = 0x10000000; 645 rpb_crb->rpb_map[0].rpb_phys = KSEG_TO_PHYS(((ulong)rpb) & ~0x1fff); 646 rpb_crb->rpb_map[0].rpb_pgcount = HWRPB_PAGES; 647 648 printf_lock("Console Callback at 0x%x, fixup at 0x%x, crb offset: 0x%x\n", 649 rpb_crb->rpb_va_disp, rpb_crb->rpb_va_fixup, rpb->rpb_crb_off); 650 651 rpb_mdt = (struct _m5_rpb_mdt *)((ulong)rpb_crb + sizeof(struct rpb_crb)); 652 rpb->rpb_mdt_off = (ulong)rpb_mdt - (ulong)rpb; 653 bcopy((char *)&m5_rpb_mdt, (char *)rpb_mdt, sizeof(struct _m5_rpb_mdt)); 654 655 656 cl = 0; 657 rpb_mdt->rpb_cluster[cl].rpb_pfncount = kern_first_page; 658 cl++; 659 660 rpb_mdt->rpb_cluster[cl].rpb_pfn = kern_first_page; 661 rpb_mdt->rpb_cluster[cl].rpb_pfncount = mem_pages - kern_first_page; 662 rpb_mdt->rpb_cluster[cl].rpb_pfntested = 663 rpb_mdt->rpb_cluster[cl].rpb_pfncount; 664 rpb_mdt->rpb_cluster[cl].rpb_pa = KSEG_TO_PHYS(mdt_bitmap); 665 rpb_mdt->rpb_cluster[cl].rpb_va = 0x10000000 + HWRPB_PAGES * PAGE_SIZE; 666 cl++; 667 668 rpb_mdt->rpb_numcl = cl; 669 670 for (i = 0; i < cl; i++) 671 printf_lock("Memory cluster %d [%d - %d]\n", i, 672 rpb_mdt->rpb_cluster[i].rpb_pfn, 673 rpb_mdt->rpb_cluster[i].rpb_pfncount); 674 675 /* Checksum the rpb for good luck */ 676 sum = 0; 677 lp1 = (long *)&rpb_mdt->rpb_impaddr; 678 lp2 = (long *)&rpb_mdt->rpb_cluster[cl]; 679 while (lp1 < lp2) sum += *lp1++; 680 rpb_mdt->rpb_checksum = sum; 681 682 /* XXX should checksum the cluster descriptors */ 683 bzero((char *)mdt_bitmap, MDT_BITMAP_PAGES * PAGE_SIZE); 684 for (i = 0; i < mem_pages/8; i++) 685 ((unsigned char *)mdt_bitmap)[i] = 0xff; 686 687 printf_lock("Initalizing mdt_bitmap addr 0x%x mem_pages %x \n", 688 (long)mdt_bitmap,(long)mem_pages); 689 690 m5_rpb.rpb_config_off = 0; 691 m5_rpb.rpb_fru_off = 0; 692 693 rpb_dsr = (struct rpb_dsr *)((ulong)rpb_mdt + sizeof(struct _m5_rpb_mdt)); 694 rpb->rpb_dsr_off = (ulong)rpb_dsr - (ulong)rpb; 695 bzero((char *)rpb_dsr, sizeof(struct rpb_dsr)); 696 rpb_dsr->rpb_smm = 1578; /* Official XXM SMM number as per SRM */ 697 rpb_dsr->rpb_smm = 1089; /* Official Alcor SMM number as per SRM */ 698 699 rpb_lurt = (int *) ROUNDUP8((ulong)rpb_dsr + sizeof(struct rpb_dsr)); 700 rpb_dsr->rpb_lurt_off = ((ulong) rpb_lurt) - (ulong) rpb_dsr; 701 bcopy((char *)m5_lurt, (char *)rpb_lurt, sizeof(m5_lurt)); 702 703 rpb_name = (char *) ROUNDUP8(((ulong)rpb_lurt) + sizeof(m5_lurt)); 704 rpb_dsr->rpb_sysname_off = ((ulong) rpb_name) - (ulong) rpb_dsr; 705#define THENAME " M5/Alpha " 706 sum = sizeof(THENAME); 707 bcopy(THENAME, rpb_name, sum); 708 *(ulong *)rpb_name = sizeof(THENAME); /* put in length field */ 709 710 /* calculate size of rpb */ 711 rpb->rpb_size = ((ulong) &rpb_name[sum]) - (ulong)rpb; 712 713 if (rpb->rpb_size > PAGE_SIZE * HWRPB_PAGES) { 714 panic("HWRPB_PAGES=%d too small for HWRPB !!! \n"); 715 } 716 717 ulong *rpbptr = (ulong*)((char*)rpb_dsr + sizeof(struct rpb_dsr)); 718 rpb_crb->rpb_pa_disp = KSEG_TO_PHYS(rpbptr); 719 rpb_crb->rpb_va_disp = 0x10000000 + 720 (((ulong)rpbptr - (ulong)rpb) & (0x2000 * HWRPB_PAGES - 1)); 721 printf_lock("ConsoleDispatch at virt %x phys %x val %x\n", 722 rpb_crb->rpb_va_disp, rpb_crb->rpb_pa_disp, consoleCallback); 723 *rpbptr++ = 0; 724 *rpbptr++ = (ulong) consoleCallback; 725 rpb_crb->rpb_pa_fixup = KSEG_TO_PHYS(rpbptr); 726 rpb_crb->rpb_va_fixup = 0x10000000 + 727 (((ulong)rpbptr - (ulong)rpb) & (0x2000 * HWRPB_PAGES - 1)); 728 *rpbptr++ = 0; 729 730 *rpbptr++ = (ulong) consoleFixup; 731 732 /* Checksum the rpb for good luck */ 733 sum = 0; 734 lp1 = (long *)rpb; 735 lp2 = &rpb->rpb_checksum; 736 while (lp1 < lp2) 737 sum += *lp1++; 738 *lp2 = sum; 739 740 /* 741 * MP bootstrap 742 */ 743 for (i = 1; i < m5Conf.numCPUs; i++) { 744 ulong stack = (ulong)unix_boot_alloc(1); 745 printf_lock("Bootstraping CPU %d with sp=0x%x\n", i, stack); 746 m5AlphaAccess->bootStrapImpure = stack; 747 m5AlphaAccess->bootStrapCPU = i; 748 } 749 750 /* 751 * Make sure that we are not stepping on the kernel 752 */ 753 if ((ulong)unix_boot_mem >= (ulong)m5Conf.kernStart) { 754 panic("CONSOLE: too much memory. Smashing kernel\n"); 755 } else { 756 printf_lock("unix_boot_mem ends at %x \n", unix_boot_mem); 757 } 758 759 JToKern((char *)bootadr, (ulong)rpb_percpu, free_pfn, kargc, kargv, NULL); 760} 761 762 763void 764JToKern(char *bootadr, ulong rpb_percpu, ulong free_pfn, ulong k_argc, 765 char **k_argv, char **envp) 766{ 767 extern ulong palJToKern[]; 768 769 struct _kernel_params *kernel_params = (struct _kernel_params *) KSEG; 770 int i; 771 772 printf_lock("k_argc = %d ", k_argc); 773 for (i = 0; i < k_argc; i++) { 774 printf_lock("'%s' ", k_argv[i]); 775 } 776 printf_lock("\n"); 777 778 kernel_params->bootadr = bootadr; 779 kernel_params->rpb_percpu = KSEG_TO_PHYS(rpb_percpu); 780 kernel_params->free_pfn = free_pfn; 781 kernel_params->argc = k_argc; 782 kernel_params->argv = (ulong)k_argv; 783 kernel_params->envp = (ulong)envp; 784 printf_lock("jumping to kernel at 0x%x, (PCBB 0x%x pfn %d)\n", 785 bootadr, rpb_percpu, free_pfn); 786 JToPal(KSEG_TO_PHYS(palJToKern)); 787 printf_lock("returned from JToPal. Looping\n"); 788 while (1) 789 continue; 790} 791 792void 793JToPal(ulong bootadr) 794{ 795 cServe(bootadr, 0, CSERVE_K_JTOPAL); 796 797 /* 798 * Make sure that floating point is enabled incase 799 * it was disabled by the user program. 800 */ 801 wrfen(1); 802} 803 804int 805strcpy(char *dst, char *src) 806{ 807 int i = 0; 808 while (*src) { 809 *dst++ = *src++; 810 i++; 811 } 812 return i; 813} 814 815/* 816 * Console I/O 817 * 818 */ 819 820int numOpenDevices = 11; 821struct { 822 char name[128]; 823} deviceState[32]; 824 825#define BOOTDEVICE_NAME "SCSI 1 0 0 1 100 0" 826 827void 828DeviceOperation(long op, long channel, long count, long address, long block) 829{ 830 long pAddr; 831 832 if (strcmp(deviceState[channel].name, BOOTDEVICE_NAME )) { 833 panic("DeviceRead: only implemented for root disk \n"); 834 } 835 pAddr = KSEG_TO_PHYS(address); 836 if (pAddr + count > m5Conf.mem_size) { 837 panic("DeviceRead: request out of range \n"); 838 } 839 840 m5AlphaAccess->diskCount = count; 841 m5AlphaAccess->diskPAddr = pAddr; 842 m5AlphaAccess->diskBlock = block; 843 m5AlphaAccess->diskOperation = op; /* launch */ 844} 845 846/* 847 * M5 Console callbacks 848 * 849 */ 850 851/* AXP manual 2-31 */ 852#define CONSCB_GETC 0x1 853#define CONSCB_PUTS 0x2 854#define CONSCB_RESET_TERM 0x3 855#define CONSCB_SET_TERM_INT 0x4 856#define CONSCB_SET_TERM_CTL 0x5 857#define CONSCB_PROCESS_KEY 0x6 858#define CONSCB_OPEN_CONSOLE 0x7 859#define CONSCB_CLOSE_CONSOLE 0x8 860 861#define CONSCB_OPEN 0x10 862#define CONSCB_CLOSE 0x11 863#define CONSCB_READ 0x13 864 865#define CONSCB_GETENV 0x22 866 867/* AXP manual 2-26 */ 868#define ENV_AUTO_ACTION 0X01 869#define ENV_BOOT_DEV 0X02 870#define ENV_BOOTDEF_DEV 0X03 871#define ENV_BOOTED_DEV 0X04 872#define ENV_BOOT_FILE 0X05 873#define ENV_BOOTED_FILE 0X06 874#define ENV_BOOT_OSFLAGS 0X07 875#define ENV_BOOTED_OSFLAGS 0X08 876#define ENV_BOOT_RESET 0X09 877#define ENV_DUMP_DEV 0X0A 878#define ENV_ENABLE_AUDIT 0X0B 879#define ENV_LICENSE 0X0C 880#define ENV_CHAR_SET 0X0D 881#define ENV_LANGUAGE 0X0E 882#define ENV_TTY_DEV 0X0F 883#define ENV_SCSIID 0X42 884#define ENV_SCSIFAST 0X43 885#define ENV_COM1_BAUD 0X44 886#define ENV_COM1_MODEM 0X45 887#define ENV_COM1_FLOW 0X46 888#define ENV_COM1_MISC 0X47 889#define ENV_COM2_BAUD 0X48 890#define ENV_COM2_MODEM 0X49 891#define ENV_COM2_FLOW 0X4A 892#define ENV_COM2_MISC 0X4B 893#define ENV_PASSWORD 0X4C 894#define ENV_SECURE 0X4D 895#define ENV_LOGFAIL 0X4E 896#define ENV_SRM2DEV_ID 0X4F 897 898#define MAX_ENVLEN 32 899 900char env_auto_action[MAX_ENVLEN] = "BOOT"; 901char env_boot_dev[MAX_ENVLEN] = ""; 902char env_bootdef_dev[MAX_ENVLEN] = ""; 903char env_booted_dev[MAX_ENVLEN] = BOOTDEVICE_NAME; 904char env_boot_file[MAX_ENVLEN] = ""; 905char env_booted_file[MAX_ENVLEN] = ""; 906char env_boot_osflags[MAX_ENVLEN] = ""; 907char env_booted_osflags[MAX_ENVLEN] = ""; 908char env_boot_reset[MAX_ENVLEN] = ""; 909char env_dump_dev[MAX_ENVLEN] = ""; 910char env_enable_audit[MAX_ENVLEN] = ""; 911char env_license[MAX_ENVLEN] = ""; 912char env_char_set[MAX_ENVLEN] = ""; 913char env_language[MAX_ENVLEN] = ""; 914char env_tty_dev[MAX_ENVLEN] = "0"; 915char env_scsiid[MAX_ENVLEN] = ""; 916char env_scsifast[MAX_ENVLEN] = ""; 917char env_com1_baud[MAX_ENVLEN] = ""; 918char env_com1_modem[MAX_ENVLEN] = ""; 919char env_com1_flow[MAX_ENVLEN] = ""; 920char env_com1_misc[MAX_ENVLEN] = ""; 921char env_com2_baud[MAX_ENVLEN] = ""; 922char env_com2_modem[MAX_ENVLEN] = ""; 923char env_com2_flow[MAX_ENVLEN] = ""; 924char env_com2_misc[MAX_ENVLEN] = ""; 925char env_password[MAX_ENVLEN] = ""; 926char env_secure[MAX_ENVLEN] = ""; 927char env_logfail[MAX_ENVLEN] = ""; 928char env_srm2dev_id[MAX_ENVLEN] = ""; 929 930#define MAX_ENV_INDEX 100 931char *envptr[MAX_ENV_INDEX] = { 932 0, /* 0x00 */ 933 env_auto_action, /* 0x01 */ 934 env_boot_dev, /* 0x02 */ 935 env_bootdef_dev, /* 0x03 */ 936 env_booted_dev, /* 0x04 */ 937 env_boot_file, /* 0x05 */ 938 env_booted_file, /* 0x06 */ 939 env_boot_osflags, /* 0x07 */ 940 env_booted_osflags, /* 0x08 */ 941 env_boot_reset, /* 0x09 */ 942 env_dump_dev, /* 0x0A */ 943 env_enable_audit, /* 0x0B */ 944 env_license, /* 0x0C */ 945 env_char_set, /* 0x0D */ 946 (char *)&env_language, /* 0x0E */ 947 env_tty_dev, /* 0x0F */ 948 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, /* 0x10 - 0x1F */ 949 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, /* 0x20 - 0x2F */ 950 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, /* 0x30 - 0x3F */ 951 0, /* 0x40 */ 952 0, /* 0x41 */ 953 env_scsiid, /* 0x42 */ 954 env_scsifast, /* 0x43 */ 955 env_com1_baud, /* 0x44 */ 956 env_com1_modem, /* 0x45 */ 957 env_com1_flow, /* 0x46 */ 958 env_com1_misc, /* 0x47 */ 959 env_com2_baud, /* 0x48 */ 960 env_com2_modem, /* 0x49 */ 961 env_com2_flow, /* 0x4A */ 962 env_com2_misc, /* 0x4B */ 963 env_password, /* 0x4C */ 964 env_secure, /* 0x4D */ 965 env_logfail, /* 0x4E */ 966 env_srm2dev_id, /* 0x4F */ 967 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, /* 0x50 - 0x5F */ 968 0, /* 0x60 */ 969 0, /* 0x61 */ 970 0, /* 0x62 */ 971 0, /* 0x63 */ 972}; 973 974long 975CallBackDispatcher(long a0, long a1, long a2, long a3, long a4) 976{ 977 long i; 978 switch (a0) { 979 case CONSCB_GETC: 980 return GetChar(); 981 982 case CONSCB_PUTS: 983 for (i = 0; i < a3; i++) 984 PutChar(*((char *)a2 + i)); 985 return a3; 986 987 case CONSCB_GETENV: 988 if (a1 >= 0 && a1 < MAX_ENV_INDEX && envptr[a1] != 0 && *envptr[a1]) { 989 i = strcpy((char*)a2, envptr[a1]); 990 } else { 991 strcpy((char*)a2, ""); 992 i = (long)0xc000000000000000; 993 if (a1 >= 0 && a1 < MAX_ENV_INDEX) 994 printf_lock("GETENV unsupported option %d (0x%x)\n", a1, a1); 995 else 996 printf_lock("GETENV unsupported option %s\n", a1); 997 } 998 999 if (i > a3) 1000 panic("CONSCB_GETENV overwrote buffer\n"); 1001 return i; 1002 1003 case CONSCB_OPEN: 1004 bcopy((char*)a1, deviceState[numOpenDevices].name, a2); 1005 deviceState[numOpenDevices].name[a2] = '\0'; 1006 printf_lock("CONSOLE OPEN : %s --> success \n", 1007 deviceState[numOpenDevices].name); 1008 return numOpenDevices++; 1009 1010 case CONSCB_READ: 1011 DeviceOperation(a0, a1, a2, a3, a4); 1012 break; 1013 1014 case CONSCB_CLOSE: 1015 break; 1016 1017 case CONSCB_OPEN_CONSOLE: 1018 printf_lock("CONSOLE OPEN\n"); 1019 return 0; /* success */ 1020 break; /* not reached */ 1021 1022 case CONSCB_CLOSE_CONSOLE: 1023 printf_lock("CONSOLE CLOSE\n"); 1024 return 0; /* success */ 1025 break; /* not reached */ 1026 1027 default: 1028 panic("CallBackDispatcher(%x,%x,%x,%x,%x)\n", a0, a1, a2, a3, a4); 1029 } 1030 1031 return 0; 1032} 1033 1034long 1035CallBackFixup(int a0, int a1, int a2) 1036{ 1037 long temp; 1038 /* 1039 * Linux uses r8 for the current pointer (pointer to data 1040 * structure contating info about currently running process). It 1041 * is set when the kernel starts and is expected to remain 1042 * there... Problem is that the unlike the kernel, the console 1043 * does not prevent the assembler from using r8. So here is a work 1044 * around. So far this has only been a problem in CallBackFixup() 1045 * but any other call back functions couldd cause a problem at 1046 * some point 1047 */ 1048 1049 /* save off the current pointer to a temp variable */ 1050 asm("bis $8, $31, %0" : "=r" (temp)); 1051 1052 /* call original code */ 1053 printf_lock("CallbackFixup %x %x, t7=%x\n", a0, a1, temp); 1054 1055 /* restore the current pointer */ 1056 asm("bis %0, $31, $8" : : "r" (temp) : "$8"); 1057 1058 return 0; 1059} 1060 1061void 1062SlaveCmd(int cpu, struct rpb_percpu *my_rpb) 1063{ 1064 extern ulong palJToSlave[]; 1065 1066 printf_lock("Slave CPU %d console command %s", cpu, 1067 my_rpb->rpb_iccb.iccb_rxbuf); 1068 1069 my_rpb->rpb_state |= STATE_BIP; 1070 my_rpb->rpb_state &= ~STATE_RC; 1071 1072 printf_lock("SlaveCmd: restart %x %x vptb %x my_rpb %x my_rpb_phys %x\n", 1073 rpb->rpb_restart, rpb->rpb_restart_pv, rpb->rpb_vptb, my_rpb, 1074 KSEG_TO_PHYS(my_rpb)); 1075 1076 cServe(KSEG_TO_PHYS(palJToSlave), (ulong)rpb->rpb_restart, 1077 CSERVE_K_JTOPAL, rpb->rpb_restart_pv, rpb->rpb_vptb, 1078 KSEG_TO_PHYS(my_rpb)); 1079 1080 panic("SlaveCmd returned \n"); 1081} 1082 1083void 1084SlaveLoop(int cpu) 1085{ 1086 int size = ROUNDUP128(sizeof(struct rpb_percpu)); 1087 struct rpb_percpu *my_rpb = (struct rpb_percpu*) 1088 ((ulong)rpb_percpu + size * cpu); 1089 1090 if (cpu == 0) { 1091 panic("CPU�0 entering slaveLoop. Reenetering the console. HOSED\n"); 1092 } else { 1093 printf_lock("Entering slaveloop for cpu %d my_rpb=%x\n", cpu, my_rpb); 1094 } 1095 1096 // swap the processors context to the one in the 1097 // rpb_percpu struct very carefully (i.e. no stack usage) 1098 // so that linux knows which processor ends up in __smp_callin 1099 // and we don't trash any data is the process 1100 SlaveSpin(cpu, my_rpb, &my_rpb->rpb_iccb.iccb_rxlen); 1101} 1102