1/* 2 * Boot code and exception vectors for Book3E processors 3 * 4 * Copyright (C) 2007 Ben. Herrenschmidt (benh@kernel.crashing.org), IBM Corp. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12#include <linux/threads.h> 13#include <asm/reg.h> 14#include <asm/page.h> 15#include <asm/ppc_asm.h> 16#include <asm/asm-offsets.h> 17#include <asm/cputable.h> 18#include <asm/setup.h> 19#include <asm/thread_info.h> 20#include <asm/reg_a2.h> 21#include <asm/exception-64e.h> 22#include <asm/bug.h> 23#include <asm/irqflags.h> 24#include <asm/ptrace.h> 25#include <asm/ppc-opcode.h> 26#include <asm/mmu.h> 27#include <asm/hw_irq.h> 28#include <asm/kvm_asm.h> 29#include <asm/kvm_booke_hv_asm.h> 30 31/* XXX This will ultimately add space for a special exception save 32 * structure used to save things like SRR0/SRR1, SPRGs, MAS, etc... 33 * when taking special interrupts. For now we don't support that, 34 * special interrupts from within a non-standard level will probably 35 * blow you up 36 */ 37#define SPECIAL_EXC_SRR0 0 38#define SPECIAL_EXC_SRR1 1 39#define SPECIAL_EXC_SPRG_GEN 2 40#define SPECIAL_EXC_SPRG_TLB 3 41#define SPECIAL_EXC_MAS0 4 42#define SPECIAL_EXC_MAS1 5 43#define SPECIAL_EXC_MAS2 6 44#define SPECIAL_EXC_MAS3 7 45#define SPECIAL_EXC_MAS6 8 46#define SPECIAL_EXC_MAS7 9 47#define SPECIAL_EXC_MAS5 10 /* E.HV only */ 48#define SPECIAL_EXC_MAS8 11 /* E.HV only */ 49#define SPECIAL_EXC_IRQHAPPENED 12 50#define SPECIAL_EXC_DEAR 13 51#define SPECIAL_EXC_ESR 14 52#define SPECIAL_EXC_SOFTE 15 53#define SPECIAL_EXC_CSRR0 16 54#define SPECIAL_EXC_CSRR1 17 55/* must be even to keep 16-byte stack alignment */ 56#define SPECIAL_EXC_END 18 57 58#define SPECIAL_EXC_FRAME_SIZE (INT_FRAME_SIZE + SPECIAL_EXC_END * 8) 59#define SPECIAL_EXC_FRAME_OFFS (INT_FRAME_SIZE - 288) 60 61#define SPECIAL_EXC_STORE(reg, name) \ 62 std reg, (SPECIAL_EXC_##name * 8 + SPECIAL_EXC_FRAME_OFFS)(r1) 63 64#define SPECIAL_EXC_LOAD(reg, name) \ 65 ld reg, (SPECIAL_EXC_##name * 8 + SPECIAL_EXC_FRAME_OFFS)(r1) 66 67special_reg_save: 68 lbz r9,PACAIRQHAPPENED(r13) 69 RECONCILE_IRQ_STATE(r3,r4) 70 71 /* 72 * We only need (or have stack space) to save this stuff if 73 * we interrupted the kernel. 74 */ 75 ld r3,_MSR(r1) 76 andi. r3,r3,MSR_PR 77 bnelr 78 79 /* Copy info into temporary exception thread info */ 80 ld r11,PACAKSAVE(r13) 81 CURRENT_THREAD_INFO(r11, r11) 82 CURRENT_THREAD_INFO(r12, r1) 83 ld r10,TI_FLAGS(r11) 84 std r10,TI_FLAGS(r12) 85 ld r10,TI_PREEMPT(r11) 86 std r10,TI_PREEMPT(r12) 87 ld r10,TI_TASK(r11) 88 std r10,TI_TASK(r12) 89 90 /* 91 * Advance to the next TLB exception frame for handler 92 * types that don't do it automatically. 93 */ 94 LOAD_REG_ADDR(r11,extlb_level_exc) 95 lwz r12,0(r11) 96 mfspr r10,SPRN_SPRG_TLB_EXFRAME 97 add r10,r10,r12 98 mtspr SPRN_SPRG_TLB_EXFRAME,r10 99 100 /* 101 * Save registers needed to allow nesting of certain exceptions 102 * (such as TLB misses) inside special exception levels 103 */ 104 mfspr r10,SPRN_SRR0 105 SPECIAL_EXC_STORE(r10,SRR0) 106 mfspr r10,SPRN_SRR1 107 SPECIAL_EXC_STORE(r10,SRR1) 108 mfspr r10,SPRN_SPRG_GEN_SCRATCH 109 SPECIAL_EXC_STORE(r10,SPRG_GEN) 110 mfspr r10,SPRN_SPRG_TLB_SCRATCH 111 SPECIAL_EXC_STORE(r10,SPRG_TLB) 112 mfspr r10,SPRN_MAS0 113 SPECIAL_EXC_STORE(r10,MAS0) 114 mfspr r10,SPRN_MAS1 115 SPECIAL_EXC_STORE(r10,MAS1) 116 mfspr r10,SPRN_MAS2 117 SPECIAL_EXC_STORE(r10,MAS2) 118 mfspr r10,SPRN_MAS3 119 SPECIAL_EXC_STORE(r10,MAS3) 120 mfspr r10,SPRN_MAS6 121 SPECIAL_EXC_STORE(r10,MAS6) 122 mfspr r10,SPRN_MAS7 123 SPECIAL_EXC_STORE(r10,MAS7) 124BEGIN_FTR_SECTION 125 mfspr r10,SPRN_MAS5 126 SPECIAL_EXC_STORE(r10,MAS5) 127 mfspr r10,SPRN_MAS8 128 SPECIAL_EXC_STORE(r10,MAS8) 129 130 /* MAS5/8 could have inappropriate values if we interrupted KVM code */ 131 li r10,0 132 mtspr SPRN_MAS5,r10 133 mtspr SPRN_MAS8,r10 134END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV) 135 SPECIAL_EXC_STORE(r9,IRQHAPPENED) 136 137 mfspr r10,SPRN_DEAR 138 SPECIAL_EXC_STORE(r10,DEAR) 139 mfspr r10,SPRN_ESR 140 SPECIAL_EXC_STORE(r10,ESR) 141 142 lbz r10,PACASOFTIRQEN(r13) 143 SPECIAL_EXC_STORE(r10,SOFTE) 144 ld r10,_NIP(r1) 145 SPECIAL_EXC_STORE(r10,CSRR0) 146 ld r10,_MSR(r1) 147 SPECIAL_EXC_STORE(r10,CSRR1) 148 149 blr 150 151ret_from_level_except: 152 ld r3,_MSR(r1) 153 andi. r3,r3,MSR_PR 154 beq 1f 155 b ret_from_except 1561: 157 158 LOAD_REG_ADDR(r11,extlb_level_exc) 159 lwz r12,0(r11) 160 mfspr r10,SPRN_SPRG_TLB_EXFRAME 161 sub r10,r10,r12 162 mtspr SPRN_SPRG_TLB_EXFRAME,r10 163 164 /* 165 * It's possible that the special level exception interrupted a 166 * TLB miss handler, and inserted the same entry that the 167 * interrupted handler was about to insert. On CPUs without TLB 168 * write conditional, this can result in a duplicate TLB entry. 169 * Wipe all non-bolted entries to be safe. 170 * 171 * Note that this doesn't protect against any TLB misses 172 * we may take accessing the stack from here to the end of 173 * the special level exception. It's not clear how we can 174 * reasonably protect against that, but only CPUs with 175 * neither TLB write conditional nor bolted kernel memory 176 * are affected. Do any such CPUs even exist? 177 */ 178 PPC_TLBILX_ALL(0,R0) 179 180 REST_NVGPRS(r1) 181 182 SPECIAL_EXC_LOAD(r10,SRR0) 183 mtspr SPRN_SRR0,r10 184 SPECIAL_EXC_LOAD(r10,SRR1) 185 mtspr SPRN_SRR1,r10 186 SPECIAL_EXC_LOAD(r10,SPRG_GEN) 187 mtspr SPRN_SPRG_GEN_SCRATCH,r10 188 SPECIAL_EXC_LOAD(r10,SPRG_TLB) 189 mtspr SPRN_SPRG_TLB_SCRATCH,r10 190 SPECIAL_EXC_LOAD(r10,MAS0) 191 mtspr SPRN_MAS0,r10 192 SPECIAL_EXC_LOAD(r10,MAS1) 193 mtspr SPRN_MAS1,r10 194 SPECIAL_EXC_LOAD(r10,MAS2) 195 mtspr SPRN_MAS2,r10 196 SPECIAL_EXC_LOAD(r10,MAS3) 197 mtspr SPRN_MAS3,r10 198 SPECIAL_EXC_LOAD(r10,MAS6) 199 mtspr SPRN_MAS6,r10 200 SPECIAL_EXC_LOAD(r10,MAS7) 201 mtspr SPRN_MAS7,r10 202BEGIN_FTR_SECTION 203 SPECIAL_EXC_LOAD(r10,MAS5) 204 mtspr SPRN_MAS5,r10 205 SPECIAL_EXC_LOAD(r10,MAS8) 206 mtspr SPRN_MAS8,r10 207END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV) 208 209 lbz r6,PACASOFTIRQEN(r13) 210 ld r5,SOFTE(r1) 211 212 /* Interrupts had better not already be enabled... */ 213 twnei r6,0 214 215 cmpwi cr0,r5,0 216 beq 1f 217 218 TRACE_ENABLE_INTS 219 stb r5,PACASOFTIRQEN(r13) 2201: 221 /* 222 * Restore PACAIRQHAPPENED rather than setting it based on 223 * the return MSR[EE], since we could have interrupted 224 * __check_irq_replay() or other inconsistent transitory 225 * states that must remain that way. 226 */ 227 SPECIAL_EXC_LOAD(r10,IRQHAPPENED) 228 stb r10,PACAIRQHAPPENED(r13) 229 230 SPECIAL_EXC_LOAD(r10,DEAR) 231 mtspr SPRN_DEAR,r10 232 SPECIAL_EXC_LOAD(r10,ESR) 233 mtspr SPRN_ESR,r10 234 235 stdcx. r0,0,r1 /* to clear the reservation */ 236 237 REST_4GPRS(2, r1) 238 REST_4GPRS(6, r1) 239 240 ld r10,_CTR(r1) 241 ld r11,_XER(r1) 242 mtctr r10 243 mtxer r11 244 245 blr 246 247.macro ret_from_level srr0 srr1 paca_ex scratch 248 bl ret_from_level_except 249 250 ld r10,_LINK(r1) 251 ld r11,_CCR(r1) 252 ld r0,GPR13(r1) 253 mtlr r10 254 mtcr r11 255 256 ld r10,GPR10(r1) 257 ld r11,GPR11(r1) 258 ld r12,GPR12(r1) 259 mtspr \scratch,r0 260 261 std r10,\paca_ex+EX_R10(r13); 262 std r11,\paca_ex+EX_R11(r13); 263 ld r10,_NIP(r1) 264 ld r11,_MSR(r1) 265 ld r0,GPR0(r1) 266 ld r1,GPR1(r1) 267 mtspr \srr0,r10 268 mtspr \srr1,r11 269 ld r10,\paca_ex+EX_R10(r13) 270 ld r11,\paca_ex+EX_R11(r13) 271 mfspr r13,\scratch 272.endm 273 274ret_from_crit_except: 275 ret_from_level SPRN_CSRR0 SPRN_CSRR1 PACA_EXCRIT SPRN_SPRG_CRIT_SCRATCH 276 rfci 277 278ret_from_mc_except: 279 ret_from_level SPRN_MCSRR0 SPRN_MCSRR1 PACA_EXMC SPRN_SPRG_MC_SCRATCH 280 rfmci 281 282/* Exception prolog code for all exceptions */ 283#define EXCEPTION_PROLOG(n, intnum, type, addition) \ 284 mtspr SPRN_SPRG_##type##_SCRATCH,r13; /* get spare registers */ \ 285 mfspr r13,SPRN_SPRG_PACA; /* get PACA */ \ 286 std r10,PACA_EX##type+EX_R10(r13); \ 287 std r11,PACA_EX##type+EX_R11(r13); \ 288 mfcr r10; /* save CR */ \ 289 mfspr r11,SPRN_##type##_SRR1;/* what are we coming from */ \ 290 DO_KVM intnum,SPRN_##type##_SRR1; /* KVM hook */ \ 291 stw r10,PACA_EX##type+EX_CR(r13); /* save old CR in the PACA */ \ 292 addition; /* additional code for that exc. */ \ 293 std r1,PACA_EX##type+EX_R1(r13); /* save old r1 in the PACA */ \ 294 type##_SET_KSTACK; /* get special stack if necessary */\ 295 andi. r10,r11,MSR_PR; /* save stack pointer */ \ 296 beq 1f; /* branch around if supervisor */ \ 297 ld r1,PACAKSAVE(r13); /* get kernel stack coming from usr */\ 2981: cmpdi cr1,r1,0; /* check if SP makes sense */ \ 299 bge- cr1,exc_##n##_bad_stack;/* bad stack (TODO: out of line) */ \ 300 mfspr r10,SPRN_##type##_SRR0; /* read SRR0 before touching stack */ 301 302/* Exception type-specific macros */ 303#define GEN_SET_KSTACK \ 304 subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ 305#define SPRN_GEN_SRR0 SPRN_SRR0 306#define SPRN_GEN_SRR1 SPRN_SRR1 307 308#define GDBELL_SET_KSTACK GEN_SET_KSTACK 309#define SPRN_GDBELL_SRR0 SPRN_GSRR0 310#define SPRN_GDBELL_SRR1 SPRN_GSRR1 311 312#define CRIT_SET_KSTACK \ 313 ld r1,PACA_CRIT_STACK(r13); \ 314 subi r1,r1,SPECIAL_EXC_FRAME_SIZE 315#define SPRN_CRIT_SRR0 SPRN_CSRR0 316#define SPRN_CRIT_SRR1 SPRN_CSRR1 317 318#define DBG_SET_KSTACK \ 319 ld r1,PACA_DBG_STACK(r13); \ 320 subi r1,r1,SPECIAL_EXC_FRAME_SIZE 321#define SPRN_DBG_SRR0 SPRN_DSRR0 322#define SPRN_DBG_SRR1 SPRN_DSRR1 323 324#define MC_SET_KSTACK \ 325 ld r1,PACA_MC_STACK(r13); \ 326 subi r1,r1,SPECIAL_EXC_FRAME_SIZE 327#define SPRN_MC_SRR0 SPRN_MCSRR0 328#define SPRN_MC_SRR1 SPRN_MCSRR1 329 330#define NORMAL_EXCEPTION_PROLOG(n, intnum, addition) \ 331 EXCEPTION_PROLOG(n, intnum, GEN, addition##_GEN(n)) 332 333#define CRIT_EXCEPTION_PROLOG(n, intnum, addition) \ 334 EXCEPTION_PROLOG(n, intnum, CRIT, addition##_CRIT(n)) 335 336#define DBG_EXCEPTION_PROLOG(n, intnum, addition) \ 337 EXCEPTION_PROLOG(n, intnum, DBG, addition##_DBG(n)) 338 339#define MC_EXCEPTION_PROLOG(n, intnum, addition) \ 340 EXCEPTION_PROLOG(n, intnum, MC, addition##_MC(n)) 341 342#define GDBELL_EXCEPTION_PROLOG(n, intnum, addition) \ 343 EXCEPTION_PROLOG(n, intnum, GDBELL, addition##_GDBELL(n)) 344 345/* Variants of the "addition" argument for the prolog 346 */ 347#define PROLOG_ADDITION_NONE_GEN(n) 348#define PROLOG_ADDITION_NONE_GDBELL(n) 349#define PROLOG_ADDITION_NONE_CRIT(n) 350#define PROLOG_ADDITION_NONE_DBG(n) 351#define PROLOG_ADDITION_NONE_MC(n) 352 353#define PROLOG_ADDITION_MASKABLE_GEN(n) \ 354 lbz r10,PACASOFTIRQEN(r13); /* are irqs soft-disabled ? */ \ 355 cmpwi cr0,r10,0; /* yes -> go out of line */ \ 356 beq masked_interrupt_book3e_##n 357 358#define PROLOG_ADDITION_2REGS_GEN(n) \ 359 std r14,PACA_EXGEN+EX_R14(r13); \ 360 std r15,PACA_EXGEN+EX_R15(r13) 361 362#define PROLOG_ADDITION_1REG_GEN(n) \ 363 std r14,PACA_EXGEN+EX_R14(r13); 364 365#define PROLOG_ADDITION_2REGS_CRIT(n) \ 366 std r14,PACA_EXCRIT+EX_R14(r13); \ 367 std r15,PACA_EXCRIT+EX_R15(r13) 368 369#define PROLOG_ADDITION_2REGS_DBG(n) \ 370 std r14,PACA_EXDBG+EX_R14(r13); \ 371 std r15,PACA_EXDBG+EX_R15(r13) 372 373#define PROLOG_ADDITION_2REGS_MC(n) \ 374 std r14,PACA_EXMC+EX_R14(r13); \ 375 std r15,PACA_EXMC+EX_R15(r13) 376 377 378/* Core exception code for all exceptions except TLB misses. */ 379#define EXCEPTION_COMMON_LVL(n, scratch, excf) \ 380exc_##n##_common: \ 381 std r0,GPR0(r1); /* save r0 in stackframe */ \ 382 std r2,GPR2(r1); /* save r2 in stackframe */ \ 383 SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 384 SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 385 std r9,GPR9(r1); /* save r9 in stackframe */ \ 386 std r10,_NIP(r1); /* save SRR0 to stackframe */ \ 387 std r11,_MSR(r1); /* save SRR1 to stackframe */ \ 388 beq 2f; /* if from kernel mode */ \ 389 ACCOUNT_CPU_USER_ENTRY(r13,r10,r11);/* accounting (uses cr0+eq) */ \ 3902: ld r3,excf+EX_R10(r13); /* get back r10 */ \ 391 ld r4,excf+EX_R11(r13); /* get back r11 */ \ 392 mfspr r5,scratch; /* get back r13 */ \ 393 std r12,GPR12(r1); /* save r12 in stackframe */ \ 394 ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 395 mflr r6; /* save LR in stackframe */ \ 396 mfctr r7; /* save CTR in stackframe */ \ 397 mfspr r8,SPRN_XER; /* save XER in stackframe */ \ 398 ld r9,excf+EX_R1(r13); /* load orig r1 back from PACA */ \ 399 lwz r10,excf+EX_CR(r13); /* load orig CR back from PACA */ \ 400 lbz r11,PACASOFTIRQEN(r13); /* get current IRQ softe */ \ 401 ld r12,exception_marker@toc(r2); \ 402 li r0,0; \ 403 std r3,GPR10(r1); /* save r10 to stackframe */ \ 404 std r4,GPR11(r1); /* save r11 to stackframe */ \ 405 std r5,GPR13(r1); /* save it to stackframe */ \ 406 std r6,_LINK(r1); \ 407 std r7,_CTR(r1); \ 408 std r8,_XER(r1); \ 409 li r3,(n)+1; /* indicate partial regs in trap */ \ 410 std r9,0(r1); /* store stack frame back link */ \ 411 std r10,_CCR(r1); /* store orig CR in stackframe */ \ 412 std r9,GPR1(r1); /* store stack frame back link */ \ 413 std r11,SOFTE(r1); /* and save it to stackframe */ \ 414 std r12,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 415 std r3,_TRAP(r1); /* set trap number */ \ 416 std r0,RESULT(r1); /* clear regs->result */ 417 418#define EXCEPTION_COMMON(n) \ 419 EXCEPTION_COMMON_LVL(n, SPRN_SPRG_GEN_SCRATCH, PACA_EXGEN) 420#define EXCEPTION_COMMON_CRIT(n) \ 421 EXCEPTION_COMMON_LVL(n, SPRN_SPRG_CRIT_SCRATCH, PACA_EXCRIT) 422#define EXCEPTION_COMMON_MC(n) \ 423 EXCEPTION_COMMON_LVL(n, SPRN_SPRG_MC_SCRATCH, PACA_EXMC) 424#define EXCEPTION_COMMON_DBG(n) \ 425 EXCEPTION_COMMON_LVL(n, SPRN_SPRG_DBG_SCRATCH, PACA_EXDBG) 426 427/* 428 * This is meant for exceptions that don't immediately hard-enable. We 429 * set a bit in paca->irq_happened to ensure that a subsequent call to 430 * arch_local_irq_restore() will properly hard-enable and avoid the 431 * fast-path, and then reconcile irq state. 432 */ 433#define INTS_DISABLE RECONCILE_IRQ_STATE(r3,r4) 434 435/* 436 * This is called by exceptions that don't use INTS_DISABLE (that did not 437 * touch irq indicators in the PACA). This will restore MSR:EE to it's 438 * previous value 439 * 440 * XXX In the long run, we may want to open-code it in order to separate the 441 * load from the wrtee, thus limiting the latency caused by the dependency 442 * but at this point, I'll favor code clarity until we have a near to final 443 * implementation 444 */ 445#define INTS_RESTORE_HARD \ 446 ld r11,_MSR(r1); \ 447 wrtee r11; 448 449/* XXX FIXME: Restore r14/r15 when necessary */ 450#define BAD_STACK_TRAMPOLINE(n) \ 451exc_##n##_bad_stack: \ 452 li r1,(n); /* get exception number */ \ 453 sth r1,PACA_TRAP_SAVE(r13); /* store trap */ \ 454 b bad_stack_book3e; /* bad stack error */ 455 456/* WARNING: If you change the layout of this stub, make sure you check 457 * the debug exception handler which handles single stepping 458 * into exceptions from userspace, and the MM code in 459 * arch/powerpc/mm/tlb_nohash.c which patches the branch here 460 * and would need to be updated if that branch is moved 461 */ 462#define EXCEPTION_STUB(loc, label) \ 463 . = interrupt_base_book3e + loc; \ 464 nop; /* To make debug interrupts happy */ \ 465 b exc_##label##_book3e; 466 467#define ACK_NONE(r) 468#define ACK_DEC(r) \ 469 lis r,TSR_DIS@h; \ 470 mtspr SPRN_TSR,r 471#define ACK_FIT(r) \ 472 lis r,TSR_FIS@h; \ 473 mtspr SPRN_TSR,r 474 475/* Used by asynchronous interrupt that may happen in the idle loop. 476 * 477 * This check if the thread was in the idle loop, and if yes, returns 478 * to the caller rather than the PC. This is to avoid a race if 479 * interrupts happen before the wait instruction. 480 */ 481#define CHECK_NAPPING() \ 482 CURRENT_THREAD_INFO(r11, r1); \ 483 ld r10,TI_LOCAL_FLAGS(r11); \ 484 andi. r9,r10,_TLF_NAPPING; \ 485 beq+ 1f; \ 486 ld r8,_LINK(r1); \ 487 rlwinm r7,r10,0,~_TLF_NAPPING; \ 488 std r8,_NIP(r1); \ 489 std r7,TI_LOCAL_FLAGS(r11); \ 4901: 491 492 493#define MASKABLE_EXCEPTION(trapnum, intnum, label, hdlr, ack) \ 494 START_EXCEPTION(label); \ 495 NORMAL_EXCEPTION_PROLOG(trapnum, intnum, PROLOG_ADDITION_MASKABLE)\ 496 EXCEPTION_COMMON(trapnum) \ 497 INTS_DISABLE; \ 498 ack(r8); \ 499 CHECK_NAPPING(); \ 500 addi r3,r1,STACK_FRAME_OVERHEAD; \ 501 bl hdlr; \ 502 b ret_from_except_lite; 503 504/* This value is used to mark exception frames on the stack. */ 505 .section ".toc","aw" 506exception_marker: 507 .tc ID_EXC_MARKER[TC],STACK_FRAME_REGS_MARKER 508 509 510/* 511 * And here we have the exception vectors ! 512 */ 513 514 .text 515 .balign 0x1000 516 .globl interrupt_base_book3e 517interrupt_base_book3e: /* fake trap */ 518 EXCEPTION_STUB(0x000, machine_check) 519 EXCEPTION_STUB(0x020, critical_input) /* 0x0100 */ 520 EXCEPTION_STUB(0x040, debug_crit) /* 0x0d00 */ 521 EXCEPTION_STUB(0x060, data_storage) /* 0x0300 */ 522 EXCEPTION_STUB(0x080, instruction_storage) /* 0x0400 */ 523 EXCEPTION_STUB(0x0a0, external_input) /* 0x0500 */ 524 EXCEPTION_STUB(0x0c0, alignment) /* 0x0600 */ 525 EXCEPTION_STUB(0x0e0, program) /* 0x0700 */ 526 EXCEPTION_STUB(0x100, fp_unavailable) /* 0x0800 */ 527 EXCEPTION_STUB(0x120, system_call) /* 0x0c00 */ 528 EXCEPTION_STUB(0x140, ap_unavailable) /* 0x0f20 */ 529 EXCEPTION_STUB(0x160, decrementer) /* 0x0900 */ 530 EXCEPTION_STUB(0x180, fixed_interval) /* 0x0980 */ 531 EXCEPTION_STUB(0x1a0, watchdog) /* 0x09f0 */ 532 EXCEPTION_STUB(0x1c0, data_tlb_miss) 533 EXCEPTION_STUB(0x1e0, instruction_tlb_miss) 534 EXCEPTION_STUB(0x200, altivec_unavailable) 535 EXCEPTION_STUB(0x220, altivec_assist) 536 EXCEPTION_STUB(0x260, perfmon) 537 EXCEPTION_STUB(0x280, doorbell) 538 EXCEPTION_STUB(0x2a0, doorbell_crit) 539 EXCEPTION_STUB(0x2c0, guest_doorbell) 540 EXCEPTION_STUB(0x2e0, guest_doorbell_crit) 541 EXCEPTION_STUB(0x300, hypercall) 542 EXCEPTION_STUB(0x320, ehpriv) 543 EXCEPTION_STUB(0x340, lrat_error) 544 545 .globl __end_interrupts 546__end_interrupts: 547 548/* Critical Input Interrupt */ 549 START_EXCEPTION(critical_input); 550 CRIT_EXCEPTION_PROLOG(0x100, BOOKE_INTERRUPT_CRITICAL, 551 PROLOG_ADDITION_NONE) 552 EXCEPTION_COMMON_CRIT(0x100) 553 bl save_nvgprs 554 bl special_reg_save 555 CHECK_NAPPING(); 556 addi r3,r1,STACK_FRAME_OVERHEAD 557 bl unknown_exception 558 b ret_from_crit_except 559 560/* Machine Check Interrupt */ 561 START_EXCEPTION(machine_check); 562 MC_EXCEPTION_PROLOG(0x000, BOOKE_INTERRUPT_MACHINE_CHECK, 563 PROLOG_ADDITION_NONE) 564 EXCEPTION_COMMON_MC(0x000) 565 bl save_nvgprs 566 bl special_reg_save 567 CHECK_NAPPING(); 568 addi r3,r1,STACK_FRAME_OVERHEAD 569 bl machine_check_exception 570 b ret_from_mc_except 571 572/* Data Storage Interrupt */ 573 START_EXCEPTION(data_storage) 574 NORMAL_EXCEPTION_PROLOG(0x300, BOOKE_INTERRUPT_DATA_STORAGE, 575 PROLOG_ADDITION_2REGS) 576 mfspr r14,SPRN_DEAR 577 mfspr r15,SPRN_ESR 578 EXCEPTION_COMMON(0x300) 579 INTS_DISABLE 580 b storage_fault_common 581 582/* Instruction Storage Interrupt */ 583 START_EXCEPTION(instruction_storage); 584 NORMAL_EXCEPTION_PROLOG(0x400, BOOKE_INTERRUPT_INST_STORAGE, 585 PROLOG_ADDITION_2REGS) 586 li r15,0 587 mr r14,r10 588 EXCEPTION_COMMON(0x400) 589 INTS_DISABLE 590 b storage_fault_common 591 592/* External Input Interrupt */ 593 MASKABLE_EXCEPTION(0x500, BOOKE_INTERRUPT_EXTERNAL, 594 external_input, do_IRQ, ACK_NONE) 595 596/* Alignment */ 597 START_EXCEPTION(alignment); 598 NORMAL_EXCEPTION_PROLOG(0x600, BOOKE_INTERRUPT_ALIGNMENT, 599 PROLOG_ADDITION_2REGS) 600 mfspr r14,SPRN_DEAR 601 mfspr r15,SPRN_ESR 602 EXCEPTION_COMMON(0x600) 603 b alignment_more /* no room, go out of line */ 604 605/* Program Interrupt */ 606 START_EXCEPTION(program); 607 NORMAL_EXCEPTION_PROLOG(0x700, BOOKE_INTERRUPT_PROGRAM, 608 PROLOG_ADDITION_1REG) 609 mfspr r14,SPRN_ESR 610 EXCEPTION_COMMON(0x700) 611 INTS_DISABLE 612 std r14,_DSISR(r1) 613 addi r3,r1,STACK_FRAME_OVERHEAD 614 ld r14,PACA_EXGEN+EX_R14(r13) 615 bl save_nvgprs 616 bl program_check_exception 617 b ret_from_except 618 619/* Floating Point Unavailable Interrupt */ 620 START_EXCEPTION(fp_unavailable); 621 NORMAL_EXCEPTION_PROLOG(0x800, BOOKE_INTERRUPT_FP_UNAVAIL, 622 PROLOG_ADDITION_NONE) 623 /* we can probably do a shorter exception entry for that one... */ 624 EXCEPTION_COMMON(0x800) 625 ld r12,_MSR(r1) 626 andi. r0,r12,MSR_PR; 627 beq- 1f 628 bl load_up_fpu 629 b fast_exception_return 6301: INTS_DISABLE 631 bl save_nvgprs 632 addi r3,r1,STACK_FRAME_OVERHEAD 633 bl kernel_fp_unavailable_exception 634 b ret_from_except 635 636/* Altivec Unavailable Interrupt */ 637 START_EXCEPTION(altivec_unavailable); 638 NORMAL_EXCEPTION_PROLOG(0x200, BOOKE_INTERRUPT_ALTIVEC_UNAVAIL, 639 PROLOG_ADDITION_NONE) 640 /* we can probably do a shorter exception entry for that one... */ 641 EXCEPTION_COMMON(0x200) 642#ifdef CONFIG_ALTIVEC 643BEGIN_FTR_SECTION 644 ld r12,_MSR(r1) 645 andi. r0,r12,MSR_PR; 646 beq- 1f 647 bl load_up_altivec 648 b fast_exception_return 6491: 650END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 651#endif 652 INTS_DISABLE 653 bl save_nvgprs 654 addi r3,r1,STACK_FRAME_OVERHEAD 655 bl altivec_unavailable_exception 656 b ret_from_except 657 658/* AltiVec Assist */ 659 START_EXCEPTION(altivec_assist); 660 NORMAL_EXCEPTION_PROLOG(0x220, 661 BOOKE_INTERRUPT_ALTIVEC_ASSIST, 662 PROLOG_ADDITION_NONE) 663 EXCEPTION_COMMON(0x220) 664 INTS_DISABLE 665 bl save_nvgprs 666 addi r3,r1,STACK_FRAME_OVERHEAD 667#ifdef CONFIG_ALTIVEC 668BEGIN_FTR_SECTION 669 bl altivec_assist_exception 670END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) 671#else 672 bl unknown_exception 673#endif 674 b ret_from_except 675 676 677/* Decrementer Interrupt */ 678 MASKABLE_EXCEPTION(0x900, BOOKE_INTERRUPT_DECREMENTER, 679 decrementer, timer_interrupt, ACK_DEC) 680 681/* Fixed Interval Timer Interrupt */ 682 MASKABLE_EXCEPTION(0x980, BOOKE_INTERRUPT_FIT, 683 fixed_interval, unknown_exception, ACK_FIT) 684 685/* Watchdog Timer Interrupt */ 686 START_EXCEPTION(watchdog); 687 CRIT_EXCEPTION_PROLOG(0x9f0, BOOKE_INTERRUPT_WATCHDOG, 688 PROLOG_ADDITION_NONE) 689 EXCEPTION_COMMON_CRIT(0x9f0) 690 bl save_nvgprs 691 bl special_reg_save 692 CHECK_NAPPING(); 693 addi r3,r1,STACK_FRAME_OVERHEAD 694#ifdef CONFIG_BOOKE_WDT 695 bl WatchdogException 696#else 697 bl unknown_exception 698#endif 699 b ret_from_crit_except 700 701/* System Call Interrupt */ 702 START_EXCEPTION(system_call) 703 mr r9,r13 /* keep a copy of userland r13 */ 704 mfspr r11,SPRN_SRR0 /* get return address */ 705 mfspr r12,SPRN_SRR1 /* get previous MSR */ 706 mfspr r13,SPRN_SPRG_PACA /* get our PACA */ 707 b system_call_common 708 709/* Auxiliary Processor Unavailable Interrupt */ 710 START_EXCEPTION(ap_unavailable); 711 NORMAL_EXCEPTION_PROLOG(0xf20, BOOKE_INTERRUPT_AP_UNAVAIL, 712 PROLOG_ADDITION_NONE) 713 EXCEPTION_COMMON(0xf20) 714 INTS_DISABLE 715 bl save_nvgprs 716 addi r3,r1,STACK_FRAME_OVERHEAD 717 bl unknown_exception 718 b ret_from_except 719 720/* Debug exception as a critical interrupt*/ 721 START_EXCEPTION(debug_crit); 722 CRIT_EXCEPTION_PROLOG(0xd00, BOOKE_INTERRUPT_DEBUG, 723 PROLOG_ADDITION_2REGS) 724 725 /* 726 * If there is a single step or branch-taken exception in an 727 * exception entry sequence, it was probably meant to apply to 728 * the code where the exception occurred (since exception entry 729 * doesn't turn off DE automatically). We simulate the effect 730 * of turning off DE on entry to an exception handler by turning 731 * off DE in the CSRR1 value and clearing the debug status. 732 */ 733 734 mfspr r14,SPRN_DBSR /* check single-step/branch taken */ 735 andis. r15,r14,(DBSR_IC|DBSR_BT)@h 736 beq+ 1f 737 738#ifdef CONFIG_RELOCATABLE 739 ld r15,PACATOC(r13) 740 ld r14,interrupt_base_book3e@got(r15) 741 ld r15,__end_interrupts@got(r15) 742#else 743 LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e) 744 LOAD_REG_IMMEDIATE(r15,__end_interrupts) 745#endif 746 cmpld cr0,r10,r14 747 cmpld cr1,r10,r15 748 blt+ cr0,1f 749 bge+ cr1,1f 750 751 /* here it looks like we got an inappropriate debug exception. */ 752 lis r14,(DBSR_IC|DBSR_BT)@h /* clear the event */ 753 rlwinm r11,r11,0,~MSR_DE /* clear DE in the CSRR1 value */ 754 mtspr SPRN_DBSR,r14 755 mtspr SPRN_CSRR1,r11 756 lwz r10,PACA_EXCRIT+EX_CR(r13) /* restore registers */ 757 ld r1,PACA_EXCRIT+EX_R1(r13) 758 ld r14,PACA_EXCRIT+EX_R14(r13) 759 ld r15,PACA_EXCRIT+EX_R15(r13) 760 mtcr r10 761 ld r10,PACA_EXCRIT+EX_R10(r13) /* restore registers */ 762 ld r11,PACA_EXCRIT+EX_R11(r13) 763 mfspr r13,SPRN_SPRG_CRIT_SCRATCH 764 rfci 765 766 /* Normal debug exception */ 767 /* XXX We only handle coming from userspace for now since we can't 768 * quite save properly an interrupted kernel state yet 769 */ 7701: andi. r14,r11,MSR_PR; /* check for userspace again */ 771 beq kernel_dbg_exc; /* if from kernel mode */ 772 773 /* Now we mash up things to make it look like we are coming on a 774 * normal exception 775 */ 776 mfspr r14,SPRN_DBSR 777 EXCEPTION_COMMON_CRIT(0xd00) 778 std r14,_DSISR(r1) 779 addi r3,r1,STACK_FRAME_OVERHEAD 780 mr r4,r14 781 ld r14,PACA_EXCRIT+EX_R14(r13) 782 ld r15,PACA_EXCRIT+EX_R15(r13) 783 bl save_nvgprs 784 bl DebugException 785 b ret_from_except 786 787kernel_dbg_exc: 788 b . /* NYI */ 789 790/* Debug exception as a debug interrupt*/ 791 START_EXCEPTION(debug_debug); 792 DBG_EXCEPTION_PROLOG(0xd00, BOOKE_INTERRUPT_DEBUG, 793 PROLOG_ADDITION_2REGS) 794 795 /* 796 * If there is a single step or branch-taken exception in an 797 * exception entry sequence, it was probably meant to apply to 798 * the code where the exception occurred (since exception entry 799 * doesn't turn off DE automatically). We simulate the effect 800 * of turning off DE on entry to an exception handler by turning 801 * off DE in the DSRR1 value and clearing the debug status. 802 */ 803 804 mfspr r14,SPRN_DBSR /* check single-step/branch taken */ 805 andis. r15,r14,(DBSR_IC|DBSR_BT)@h 806 beq+ 1f 807 808#ifdef CONFIG_RELOCATABLE 809 ld r15,PACATOC(r13) 810 ld r14,interrupt_base_book3e@got(r15) 811 ld r15,__end_interrupts@got(r15) 812#else 813 LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e) 814 LOAD_REG_IMMEDIATE(r15,__end_interrupts) 815#endif 816 cmpld cr0,r10,r14 817 cmpld cr1,r10,r15 818 blt+ cr0,1f 819 bge+ cr1,1f 820 821 /* here it looks like we got an inappropriate debug exception. */ 822 lis r14,(DBSR_IC|DBSR_BT)@h /* clear the event */ 823 rlwinm r11,r11,0,~MSR_DE /* clear DE in the DSRR1 value */ 824 mtspr SPRN_DBSR,r14 825 mtspr SPRN_DSRR1,r11 826 lwz r10,PACA_EXDBG+EX_CR(r13) /* restore registers */ 827 ld r1,PACA_EXDBG+EX_R1(r13) 828 ld r14,PACA_EXDBG+EX_R14(r13) 829 ld r15,PACA_EXDBG+EX_R15(r13) 830 mtcr r10 831 ld r10,PACA_EXDBG+EX_R10(r13) /* restore registers */ 832 ld r11,PACA_EXDBG+EX_R11(r13) 833 mfspr r13,SPRN_SPRG_DBG_SCRATCH 834 rfdi 835 836 /* Normal debug exception */ 837 /* XXX We only handle coming from userspace for now since we can't 838 * quite save properly an interrupted kernel state yet 839 */ 8401: andi. r14,r11,MSR_PR; /* check for userspace again */ 841 beq kernel_dbg_exc; /* if from kernel mode */ 842 843 /* Now we mash up things to make it look like we are coming on a 844 * normal exception 845 */ 846 mfspr r14,SPRN_DBSR 847 EXCEPTION_COMMON_DBG(0xd08) 848 INTS_DISABLE 849 std r14,_DSISR(r1) 850 addi r3,r1,STACK_FRAME_OVERHEAD 851 mr r4,r14 852 ld r14,PACA_EXDBG+EX_R14(r13) 853 ld r15,PACA_EXDBG+EX_R15(r13) 854 bl save_nvgprs 855 bl DebugException 856 b ret_from_except 857 858 START_EXCEPTION(perfmon); 859 NORMAL_EXCEPTION_PROLOG(0x260, BOOKE_INTERRUPT_PERFORMANCE_MONITOR, 860 PROLOG_ADDITION_NONE) 861 EXCEPTION_COMMON(0x260) 862 INTS_DISABLE 863 CHECK_NAPPING() 864 addi r3,r1,STACK_FRAME_OVERHEAD 865 bl performance_monitor_exception 866 b ret_from_except_lite 867 868/* Doorbell interrupt */ 869 MASKABLE_EXCEPTION(0x280, BOOKE_INTERRUPT_DOORBELL, 870 doorbell, doorbell_exception, ACK_NONE) 871 872/* Doorbell critical Interrupt */ 873 START_EXCEPTION(doorbell_crit); 874 CRIT_EXCEPTION_PROLOG(0x2a0, BOOKE_INTERRUPT_DOORBELL_CRITICAL, 875 PROLOG_ADDITION_NONE) 876 EXCEPTION_COMMON_CRIT(0x2a0) 877 bl save_nvgprs 878 bl special_reg_save 879 CHECK_NAPPING(); 880 addi r3,r1,STACK_FRAME_OVERHEAD 881 bl unknown_exception 882 b ret_from_crit_except 883 884/* 885 * Guest doorbell interrupt 886 * This general exception use GSRRx save/restore registers 887 */ 888 START_EXCEPTION(guest_doorbell); 889 GDBELL_EXCEPTION_PROLOG(0x2c0, BOOKE_INTERRUPT_GUEST_DBELL, 890 PROLOG_ADDITION_NONE) 891 EXCEPTION_COMMON(0x2c0) 892 addi r3,r1,STACK_FRAME_OVERHEAD 893 bl save_nvgprs 894 INTS_RESTORE_HARD 895 bl unknown_exception 896 b ret_from_except 897 898/* Guest Doorbell critical Interrupt */ 899 START_EXCEPTION(guest_doorbell_crit); 900 CRIT_EXCEPTION_PROLOG(0x2e0, BOOKE_INTERRUPT_GUEST_DBELL_CRIT, 901 PROLOG_ADDITION_NONE) 902 EXCEPTION_COMMON_CRIT(0x2e0) 903 bl save_nvgprs 904 bl special_reg_save 905 CHECK_NAPPING(); 906 addi r3,r1,STACK_FRAME_OVERHEAD 907 bl unknown_exception 908 b ret_from_crit_except 909 910/* Hypervisor call */ 911 START_EXCEPTION(hypercall); 912 NORMAL_EXCEPTION_PROLOG(0x310, BOOKE_INTERRUPT_HV_SYSCALL, 913 PROLOG_ADDITION_NONE) 914 EXCEPTION_COMMON(0x310) 915 addi r3,r1,STACK_FRAME_OVERHEAD 916 bl save_nvgprs 917 INTS_RESTORE_HARD 918 bl unknown_exception 919 b ret_from_except 920 921/* Embedded Hypervisor priviledged */ 922 START_EXCEPTION(ehpriv); 923 NORMAL_EXCEPTION_PROLOG(0x320, BOOKE_INTERRUPT_HV_PRIV, 924 PROLOG_ADDITION_NONE) 925 EXCEPTION_COMMON(0x320) 926 addi r3,r1,STACK_FRAME_OVERHEAD 927 bl save_nvgprs 928 INTS_RESTORE_HARD 929 bl unknown_exception 930 b ret_from_except 931 932/* LRAT Error interrupt */ 933 START_EXCEPTION(lrat_error); 934 NORMAL_EXCEPTION_PROLOG(0x340, BOOKE_INTERRUPT_LRAT_ERROR, 935 PROLOG_ADDITION_NONE) 936 EXCEPTION_COMMON(0x340) 937 addi r3,r1,STACK_FRAME_OVERHEAD 938 bl save_nvgprs 939 INTS_RESTORE_HARD 940 bl unknown_exception 941 b ret_from_except 942 943/* 944 * An interrupt came in while soft-disabled; We mark paca->irq_happened 945 * accordingly and if the interrupt is level sensitive, we hard disable 946 */ 947 948.macro masked_interrupt_book3e paca_irq full_mask 949 lbz r10,PACAIRQHAPPENED(r13) 950 ori r10,r10,\paca_irq 951 stb r10,PACAIRQHAPPENED(r13) 952 953 .if \full_mask == 1 954 rldicl r10,r11,48,1 /* clear MSR_EE */ 955 rotldi r11,r10,16 956 mtspr SPRN_SRR1,r11 957 .endif 958 959 lwz r11,PACA_EXGEN+EX_CR(r13) 960 mtcr r11 961 ld r10,PACA_EXGEN+EX_R10(r13) 962 ld r11,PACA_EXGEN+EX_R11(r13) 963 mfspr r13,SPRN_SPRG_GEN_SCRATCH 964 rfi 965 b . 966.endm 967 968masked_interrupt_book3e_0x500: 969 // XXX When adding support for EPR, use PACA_IRQ_EE_EDGE 970 masked_interrupt_book3e PACA_IRQ_EE 1 971 972masked_interrupt_book3e_0x900: 973 ACK_DEC(r10); 974 masked_interrupt_book3e PACA_IRQ_DEC 0 975 976masked_interrupt_book3e_0x980: 977 ACK_FIT(r10); 978 masked_interrupt_book3e PACA_IRQ_DEC 0 979 980masked_interrupt_book3e_0x280: 981masked_interrupt_book3e_0x2c0: 982 masked_interrupt_book3e PACA_IRQ_DBELL 0 983 984/* 985 * Called from arch_local_irq_enable when an interrupt needs 986 * to be resent. r3 contains either 0x500,0x900,0x260 or 0x280 987 * to indicate the kind of interrupt. MSR:EE is already off. 988 * We generate a stackframe like if a real interrupt had happened. 989 * 990 * Note: While MSR:EE is off, we need to make sure that _MSR 991 * in the generated frame has EE set to 1 or the exception 992 * handler will not properly re-enable them. 993 */ 994_GLOBAL(__replay_interrupt) 995 /* We are going to jump to the exception common code which 996 * will retrieve various register values from the PACA which 997 * we don't give a damn about. 998 */ 999 mflr r10 1000 mfmsr r11 1001 mfcr r4 1002 mtspr SPRN_SPRG_GEN_SCRATCH,r13; 1003 std r1,PACA_EXGEN+EX_R1(r13); 1004 stw r4,PACA_EXGEN+EX_CR(r13); 1005 ori r11,r11,MSR_EE 1006 subi r1,r1,INT_FRAME_SIZE; 1007 cmpwi cr0,r3,0x500 1008 beq exc_0x500_common 1009 cmpwi cr0,r3,0x900 1010 beq exc_0x900_common 1011 cmpwi cr0,r3,0x280 1012 beq exc_0x280_common 1013 blr 1014 1015 1016/* 1017 * This is called from 0x300 and 0x400 handlers after the prologs with 1018 * r14 and r15 containing the fault address and error code, with the 1019 * original values stashed away in the PACA 1020 */ 1021storage_fault_common: 1022 std r14,_DAR(r1) 1023 std r15,_DSISR(r1) 1024 addi r3,r1,STACK_FRAME_OVERHEAD 1025 mr r4,r14 1026 mr r5,r15 1027 ld r14,PACA_EXGEN+EX_R14(r13) 1028 ld r15,PACA_EXGEN+EX_R15(r13) 1029 bl do_page_fault 1030 cmpdi r3,0 1031 bne- 1f 1032 b ret_from_except_lite 10331: bl save_nvgprs 1034 mr r5,r3 1035 addi r3,r1,STACK_FRAME_OVERHEAD 1036 ld r4,_DAR(r1) 1037 bl bad_page_fault 1038 b ret_from_except 1039 1040/* 1041 * Alignment exception doesn't fit entirely in the 0x100 bytes so it 1042 * continues here. 1043 */ 1044alignment_more: 1045 std r14,_DAR(r1) 1046 std r15,_DSISR(r1) 1047 addi r3,r1,STACK_FRAME_OVERHEAD 1048 ld r14,PACA_EXGEN+EX_R14(r13) 1049 ld r15,PACA_EXGEN+EX_R15(r13) 1050 bl save_nvgprs 1051 INTS_RESTORE_HARD 1052 bl alignment_exception 1053 b ret_from_except 1054 1055/* 1056 * We branch here from entry_64.S for the last stage of the exception 1057 * return code path. MSR:EE is expected to be off at that point 1058 */ 1059_GLOBAL(exception_return_book3e) 1060 b 1f 1061 1062/* This is the return from load_up_fpu fast path which could do with 1063 * less GPR restores in fact, but for now we have a single return path 1064 */ 1065 .globl fast_exception_return 1066fast_exception_return: 1067 wrteei 0 10681: mr r0,r13 1069 ld r10,_MSR(r1) 1070 REST_4GPRS(2, r1) 1071 andi. r6,r10,MSR_PR 1072 REST_2GPRS(6, r1) 1073 beq 1f 1074 ACCOUNT_CPU_USER_EXIT(r13, r10, r11) 1075 ld r0,GPR13(r1) 1076 10771: stdcx. r0,0,r1 /* to clear the reservation */ 1078 1079 ld r8,_CCR(r1) 1080 ld r9,_LINK(r1) 1081 ld r10,_CTR(r1) 1082 ld r11,_XER(r1) 1083 mtcr r8 1084 mtlr r9 1085 mtctr r10 1086 mtxer r11 1087 REST_2GPRS(8, r1) 1088 ld r10,GPR10(r1) 1089 ld r11,GPR11(r1) 1090 ld r12,GPR12(r1) 1091 mtspr SPRN_SPRG_GEN_SCRATCH,r0 1092 1093 std r10,PACA_EXGEN+EX_R10(r13); 1094 std r11,PACA_EXGEN+EX_R11(r13); 1095 ld r10,_NIP(r1) 1096 ld r11,_MSR(r1) 1097 ld r0,GPR0(r1) 1098 ld r1,GPR1(r1) 1099 mtspr SPRN_SRR0,r10 1100 mtspr SPRN_SRR1,r11 1101 ld r10,PACA_EXGEN+EX_R10(r13) 1102 ld r11,PACA_EXGEN+EX_R11(r13) 1103 mfspr r13,SPRN_SPRG_GEN_SCRATCH 1104 rfi 1105 1106/* 1107 * Trampolines used when spotting a bad kernel stack pointer in 1108 * the exception entry code. 1109 * 1110 * TODO: move some bits like SRR0 read to trampoline, pass PACA 1111 * index around, etc... to handle crit & mcheck 1112 */ 1113BAD_STACK_TRAMPOLINE(0x000) 1114BAD_STACK_TRAMPOLINE(0x100) 1115BAD_STACK_TRAMPOLINE(0x200) 1116BAD_STACK_TRAMPOLINE(0x220) 1117BAD_STACK_TRAMPOLINE(0x260) 1118BAD_STACK_TRAMPOLINE(0x280) 1119BAD_STACK_TRAMPOLINE(0x2a0) 1120BAD_STACK_TRAMPOLINE(0x2c0) 1121BAD_STACK_TRAMPOLINE(0x2e0) 1122BAD_STACK_TRAMPOLINE(0x300) 1123BAD_STACK_TRAMPOLINE(0x310) 1124BAD_STACK_TRAMPOLINE(0x320) 1125BAD_STACK_TRAMPOLINE(0x340) 1126BAD_STACK_TRAMPOLINE(0x400) 1127BAD_STACK_TRAMPOLINE(0x500) 1128BAD_STACK_TRAMPOLINE(0x600) 1129BAD_STACK_TRAMPOLINE(0x700) 1130BAD_STACK_TRAMPOLINE(0x800) 1131BAD_STACK_TRAMPOLINE(0x900) 1132BAD_STACK_TRAMPOLINE(0x980) 1133BAD_STACK_TRAMPOLINE(0x9f0) 1134BAD_STACK_TRAMPOLINE(0xa00) 1135BAD_STACK_TRAMPOLINE(0xb00) 1136BAD_STACK_TRAMPOLINE(0xc00) 1137BAD_STACK_TRAMPOLINE(0xd00) 1138BAD_STACK_TRAMPOLINE(0xd08) 1139BAD_STACK_TRAMPOLINE(0xe00) 1140BAD_STACK_TRAMPOLINE(0xf00) 1141BAD_STACK_TRAMPOLINE(0xf20) 1142 1143 .globl bad_stack_book3e 1144bad_stack_book3e: 1145 /* XXX: Needs to make SPRN_SPRG_GEN depend on exception type */ 1146 mfspr r10,SPRN_SRR0; /* read SRR0 before touching stack */ 1147 ld r1,PACAEMERGSP(r13) 1148 subi r1,r1,64+INT_FRAME_SIZE 1149 std r10,_NIP(r1) 1150 std r11,_MSR(r1) 1151 ld r10,PACA_EXGEN+EX_R1(r13) /* FIXME for crit & mcheck */ 1152 lwz r11,PACA_EXGEN+EX_CR(r13) /* FIXME for crit & mcheck */ 1153 std r10,GPR1(r1) 1154 std r11,_CCR(r1) 1155 mfspr r10,SPRN_DEAR 1156 mfspr r11,SPRN_ESR 1157 std r10,_DAR(r1) 1158 std r11,_DSISR(r1) 1159 std r0,GPR0(r1); /* save r0 in stackframe */ \ 1160 std r2,GPR2(r1); /* save r2 in stackframe */ \ 1161 SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 1162 SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 1163 std r9,GPR9(r1); /* save r9 in stackframe */ \ 1164 ld r3,PACA_EXGEN+EX_R10(r13);/* get back r10 */ \ 1165 ld r4,PACA_EXGEN+EX_R11(r13);/* get back r11 */ \ 1166 mfspr r5,SPRN_SPRG_GEN_SCRATCH;/* get back r13 XXX can be wrong */ \ 1167 std r3,GPR10(r1); /* save r10 to stackframe */ \ 1168 std r4,GPR11(r1); /* save r11 to stackframe */ \ 1169 std r12,GPR12(r1); /* save r12 in stackframe */ \ 1170 std r5,GPR13(r1); /* save it to stackframe */ \ 1171 mflr r10 1172 mfctr r11 1173 mfxer r12 1174 std r10,_LINK(r1) 1175 std r11,_CTR(r1) 1176 std r12,_XER(r1) 1177 SAVE_10GPRS(14,r1) 1178 SAVE_8GPRS(24,r1) 1179 lhz r12,PACA_TRAP_SAVE(r13) 1180 std r12,_TRAP(r1) 1181 addi r11,r1,INT_FRAME_SIZE 1182 std r11,0(r1) 1183 li r12,0 1184 std r12,0(r11) 1185 ld r2,PACATOC(r13) 11861: addi r3,r1,STACK_FRAME_OVERHEAD 1187 bl kernel_bad_stack 1188 b 1b 1189 1190/* 1191 * Setup the initial TLB for a core. This current implementation 1192 * assume that whatever we are running off will not conflict with 1193 * the new mapping at PAGE_OFFSET. 1194 */ 1195_GLOBAL(initial_tlb_book3e) 1196 1197 /* Look for the first TLB with IPROT set */ 1198 mfspr r4,SPRN_TLB0CFG 1199 andi. r3,r4,TLBnCFG_IPROT 1200 lis r3,MAS0_TLBSEL(0)@h 1201 bne found_iprot 1202 1203 mfspr r4,SPRN_TLB1CFG 1204 andi. r3,r4,TLBnCFG_IPROT 1205 lis r3,MAS0_TLBSEL(1)@h 1206 bne found_iprot 1207 1208 mfspr r4,SPRN_TLB2CFG 1209 andi. r3,r4,TLBnCFG_IPROT 1210 lis r3,MAS0_TLBSEL(2)@h 1211 bne found_iprot 1212 1213 lis r3,MAS0_TLBSEL(3)@h 1214 mfspr r4,SPRN_TLB3CFG 1215 /* fall through */ 1216 1217found_iprot: 1218 andi. r5,r4,TLBnCFG_HES 1219 bne have_hes 1220 1221 mflr r8 /* save LR */ 1222/* 1. Find the index of the entry we're executing in 1223 * 1224 * r3 = MAS0_TLBSEL (for the iprot array) 1225 * r4 = SPRN_TLBnCFG 1226 */ 1227 bl invstr /* Find our address */ 1228invstr: mflr r6 /* Make it accessible */ 1229 mfmsr r7 1230 rlwinm r5,r7,27,31,31 /* extract MSR[IS] */ 1231 mfspr r7,SPRN_PID 1232 slwi r7,r7,16 1233 or r7,r7,r5 1234 mtspr SPRN_MAS6,r7 1235 tlbsx 0,r6 /* search MSR[IS], SPID=PID */ 1236 1237 mfspr r3,SPRN_MAS0 1238 rlwinm r5,r3,16,20,31 /* Extract MAS0(Entry) */ 1239 1240 mfspr r7,SPRN_MAS1 /* Insure IPROT set */ 1241 oris r7,r7,MAS1_IPROT@h 1242 mtspr SPRN_MAS1,r7 1243 tlbwe 1244 1245/* 2. Invalidate all entries except the entry we're executing in 1246 * 1247 * r3 = MAS0 w/TLBSEL & ESEL for the entry we are running in 1248 * r4 = SPRN_TLBnCFG 1249 * r5 = ESEL of entry we are running in 1250 */ 1251 andi. r4,r4,TLBnCFG_N_ENTRY /* Extract # entries */ 1252 li r6,0 /* Set Entry counter to 0 */ 12531: mr r7,r3 /* Set MAS0(TLBSEL) */ 1254 rlwimi r7,r6,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r6) */ 1255 mtspr SPRN_MAS0,r7 1256 tlbre 1257 mfspr r7,SPRN_MAS1 1258 rlwinm r7,r7,0,2,31 /* Clear MAS1 Valid and IPROT */ 1259 cmpw r5,r6 1260 beq skpinv /* Dont update the current execution TLB */ 1261 mtspr SPRN_MAS1,r7 1262 tlbwe 1263 isync 1264skpinv: addi r6,r6,1 /* Increment */ 1265 cmpw r6,r4 /* Are we done? */ 1266 bne 1b /* If not, repeat */ 1267 1268 /* Invalidate all TLBs */ 1269 PPC_TLBILX_ALL(0,R0) 1270 sync 1271 isync 1272 1273/* 3. Setup a temp mapping and jump to it 1274 * 1275 * r3 = MAS0 w/TLBSEL & ESEL for the entry we are running in 1276 * r5 = ESEL of entry we are running in 1277 */ 1278 andi. r7,r5,0x1 /* Find an entry not used and is non-zero */ 1279 addi r7,r7,0x1 1280 mr r4,r3 /* Set MAS0(TLBSEL) = 1 */ 1281 mtspr SPRN_MAS0,r4 1282 tlbre 1283 1284 rlwimi r4,r7,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r7) */ 1285 mtspr SPRN_MAS0,r4 1286 1287 mfspr r7,SPRN_MAS1 1288 xori r6,r7,MAS1_TS /* Setup TMP mapping in the other Address space */ 1289 mtspr SPRN_MAS1,r6 1290 1291 tlbwe 1292 1293 mfmsr r6 1294 xori r6,r6,MSR_IS 1295 mtspr SPRN_SRR1,r6 1296 bl 1f /* Find our address */ 12971: mflr r6 1298 addi r6,r6,(2f - 1b) 1299 mtspr SPRN_SRR0,r6 1300 rfi 13012: 1302 1303/* 4. Clear out PIDs & Search info 1304 * 1305 * r3 = MAS0 w/TLBSEL & ESEL for the entry we started in 1306 * r4 = MAS0 w/TLBSEL & ESEL for the temp mapping 1307 * r5 = MAS3 1308 */ 1309 li r6,0 1310 mtspr SPRN_MAS6,r6 1311 mtspr SPRN_PID,r6 1312 1313/* 5. Invalidate mapping we started in 1314 * 1315 * r3 = MAS0 w/TLBSEL & ESEL for the entry we started in 1316 * r4 = MAS0 w/TLBSEL & ESEL for the temp mapping 1317 * r5 = MAS3 1318 */ 1319 mtspr SPRN_MAS0,r3 1320 tlbre 1321 mfspr r6,SPRN_MAS1 1322 rlwinm r6,r6,0,2,31 /* clear IPROT and VALID */ 1323 mtspr SPRN_MAS1,r6 1324 tlbwe 1325 sync 1326 isync 1327 1328/* 1329 * The mapping only needs to be cache-coherent on SMP, except on 1330 * Freescale e500mc derivatives where it's also needed for coherent DMA. 1331 */ 1332#if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC) 1333#define M_IF_NEEDED MAS2_M 1334#else 1335#define M_IF_NEEDED 0 1336#endif 1337 1338/* 6. Setup KERNELBASE mapping in TLB[0] 1339 * 1340 * r3 = MAS0 w/TLBSEL & ESEL for the entry we started in 1341 * r4 = MAS0 w/TLBSEL & ESEL for the temp mapping 1342 * r5 = MAS3 1343 */ 1344 rlwinm r3,r3,0,16,3 /* clear ESEL */ 1345 mtspr SPRN_MAS0,r3 1346 lis r6,(MAS1_VALID|MAS1_IPROT)@h 1347 ori r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_1GB))@l 1348 mtspr SPRN_MAS1,r6 1349 1350 LOAD_REG_IMMEDIATE(r6, PAGE_OFFSET | M_IF_NEEDED) 1351 mtspr SPRN_MAS2,r6 1352 1353 rlwinm r5,r5,0,0,25 1354 ori r5,r5,MAS3_SR | MAS3_SW | MAS3_SX 1355 mtspr SPRN_MAS3,r5 1356 li r5,-1 1357 rlwinm r5,r5,0,0,25 1358 1359 tlbwe 1360 1361/* 7. Jump to KERNELBASE mapping 1362 * 1363 * r4 = MAS0 w/TLBSEL & ESEL for the temp mapping 1364 */ 1365 /* Now we branch the new virtual address mapped by this entry */ 1366 bl 1f /* Find our address */ 13671: mflr r6 1368 addi r6,r6,(2f - 1b) 1369 tovirt(r6,r6) 1370 lis r7,MSR_KERNEL@h 1371 ori r7,r7,MSR_KERNEL@l 1372 mtspr SPRN_SRR0,r6 1373 mtspr SPRN_SRR1,r7 1374 rfi /* start execution out of TLB1[0] entry */ 13752: 1376 1377/* 8. Clear out the temp mapping 1378 * 1379 * r4 = MAS0 w/TLBSEL & ESEL for the entry we are running in 1380 */ 1381 mtspr SPRN_MAS0,r4 1382 tlbre 1383 mfspr r5,SPRN_MAS1 1384 rlwinm r5,r5,0,2,31 /* clear IPROT and VALID */ 1385 mtspr SPRN_MAS1,r5 1386 tlbwe 1387 sync 1388 isync 1389 1390 /* We translate LR and return */ 1391 tovirt(r8,r8) 1392 mtlr r8 1393 blr 1394 1395have_hes: 1396 /* Setup MAS 0,1,2,3 and 7 for tlbwe of a 1G entry that maps the 1397 * kernel linear mapping. We also set MAS8 once for all here though 1398 * that will have to be made dependent on whether we are running under 1399 * a hypervisor I suppose. 1400 */ 1401 1402 /* BEWARE, MAGIC 1403 * This code is called as an ordinary function on the boot CPU. But to 1404 * avoid duplication, this code is also used in SCOM bringup of 1405 * secondary CPUs. We read the code between the initial_tlb_code_start 1406 * and initial_tlb_code_end labels one instruction at a time and RAM it 1407 * into the new core via SCOM. That doesn't process branches, so there 1408 * must be none between those two labels. It also means if this code 1409 * ever takes any parameters, the SCOM code must also be updated to 1410 * provide them. 1411 */ 1412 .globl a2_tlbinit_code_start 1413a2_tlbinit_code_start: 1414 1415 ori r11,r3,MAS0_WQ_ALLWAYS 1416 oris r11,r11,MAS0_ESEL(3)@h /* Use way 3: workaround A2 erratum 376 */ 1417 mtspr SPRN_MAS0,r11 1418 lis r3,(MAS1_VALID | MAS1_IPROT)@h 1419 ori r3,r3,BOOK3E_PAGESZ_1GB << MAS1_TSIZE_SHIFT 1420 mtspr SPRN_MAS1,r3 1421 LOAD_REG_IMMEDIATE(r3, PAGE_OFFSET | MAS2_M) 1422 mtspr SPRN_MAS2,r3 1423 li r3,MAS3_SR | MAS3_SW | MAS3_SX 1424 mtspr SPRN_MAS7_MAS3,r3 1425 li r3,0 1426 mtspr SPRN_MAS8,r3 1427 1428 /* Write the TLB entry */ 1429 tlbwe 1430 1431 .globl a2_tlbinit_after_linear_map 1432a2_tlbinit_after_linear_map: 1433 1434 /* Now we branch the new virtual address mapped by this entry */ 1435 LOAD_REG_IMMEDIATE(r3,1f) 1436 mtctr r3 1437 bctr 1438 14391: /* We are now running at PAGE_OFFSET, clean the TLB of everything 1440 * else (including IPROTed things left by firmware) 1441 * r4 = TLBnCFG 1442 * r3 = current address (more or less) 1443 */ 1444 1445 li r5,0 1446 mtspr SPRN_MAS6,r5 1447 tlbsx 0,r3 1448 1449 rlwinm r9,r4,0,TLBnCFG_N_ENTRY 1450 rlwinm r10,r4,8,0xff 1451 addi r10,r10,-1 /* Get inner loop mask */ 1452 1453 li r3,1 1454 1455 mfspr r5,SPRN_MAS1 1456 rlwinm r5,r5,0,(~(MAS1_VALID|MAS1_IPROT)) 1457 1458 mfspr r6,SPRN_MAS2 1459 rldicr r6,r6,0,51 /* Extract EPN */ 1460 1461 mfspr r7,SPRN_MAS0 1462 rlwinm r7,r7,0,0xffff0fff /* Clear HES and WQ */ 1463 1464 rlwinm r8,r7,16,0xfff /* Extract ESEL */ 1465 14662: add r4,r3,r8 1467 and r4,r4,r10 1468 1469 rlwimi r7,r4,16,MAS0_ESEL_MASK 1470 1471 mtspr SPRN_MAS0,r7 1472 mtspr SPRN_MAS1,r5 1473 mtspr SPRN_MAS2,r6 1474 tlbwe 1475 1476 addi r3,r3,1 1477 and. r4,r3,r10 1478 1479 bne 3f 1480 addis r6,r6,(1<<30)@h 14813: 1482 cmpw r3,r9 1483 blt 2b 1484 1485 .globl a2_tlbinit_after_iprot_flush 1486a2_tlbinit_after_iprot_flush: 1487 1488 PPC_TLBILX(0,0,R0) 1489 sync 1490 isync 1491 1492 .globl a2_tlbinit_code_end 1493a2_tlbinit_code_end: 1494 1495 /* We translate LR and return */ 1496 mflr r3 1497 tovirt(r3,r3) 1498 mtlr r3 1499 blr 1500 1501/* 1502 * Main entry (boot CPU, thread 0) 1503 * 1504 * We enter here from head_64.S, possibly after the prom_init trampoline 1505 * with r3 and r4 already saved to r31 and 30 respectively and in 64 bits 1506 * mode. Anything else is as it was left by the bootloader 1507 * 1508 * Initial requirements of this port: 1509 * 1510 * - Kernel loaded at 0 physical 1511 * - A good lump of memory mapped 0:0 by UTLB entry 0 1512 * - MSR:IS & MSR:DS set to 0 1513 * 1514 * Note that some of the above requirements will be relaxed in the future 1515 * as the kernel becomes smarter at dealing with different initial conditions 1516 * but for now you have to be careful 1517 */ 1518_GLOBAL(start_initialization_book3e) 1519 mflr r28 1520 1521 /* First, we need to setup some initial TLBs to map the kernel 1522 * text, data and bss at PAGE_OFFSET. We don't have a real mode 1523 * and always use AS 0, so we just set it up to match our link 1524 * address and never use 0 based addresses. 1525 */ 1526 bl initial_tlb_book3e 1527 1528 /* Init global core bits */ 1529 bl init_core_book3e 1530 1531 /* Init per-thread bits */ 1532 bl init_thread_book3e 1533 1534 /* Return to common init code */ 1535 tovirt(r28,r28) 1536 mtlr r28 1537 blr 1538 1539 1540/* 1541 * Secondary core/processor entry 1542 * 1543 * This is entered for thread 0 of a secondary core, all other threads 1544 * are expected to be stopped. It's similar to start_initialization_book3e 1545 * except that it's generally entered from the holding loop in head_64.S 1546 * after CPUs have been gathered by Open Firmware. 1547 * 1548 * We assume we are in 32 bits mode running with whatever TLB entry was 1549 * set for us by the firmware or POR engine. 1550 */ 1551_GLOBAL(book3e_secondary_core_init_tlb_set) 1552 li r4,1 1553 b generic_secondary_smp_init 1554 1555_GLOBAL(book3e_secondary_core_init) 1556 mflr r28 1557 1558 /* Do we need to setup initial TLB entry ? */ 1559 cmplwi r4,0 1560 bne 2f 1561 1562 /* Setup TLB for this core */ 1563 bl initial_tlb_book3e 1564 1565 /* We can return from the above running at a different 1566 * address, so recalculate r2 (TOC) 1567 */ 1568 bl relative_toc 1569 1570 /* Init global core bits */ 15712: bl init_core_book3e 1572 1573 /* Init per-thread bits */ 15743: bl init_thread_book3e 1575 1576 /* Return to common init code at proper virtual address. 1577 * 1578 * Due to various previous assumptions, we know we entered this 1579 * function at either the final PAGE_OFFSET mapping or using a 1580 * 1:1 mapping at 0, so we don't bother doing a complicated check 1581 * here, we just ensure the return address has the right top bits. 1582 * 1583 * Note that if we ever want to be smarter about where we can be 1584 * started from, we have to be careful that by the time we reach 1585 * the code below we may already be running at a different location 1586 * than the one we were called from since initial_tlb_book3e can 1587 * have moved us already. 1588 */ 1589 cmpdi cr0,r28,0 1590 blt 1f 1591 lis r3,PAGE_OFFSET@highest 1592 sldi r3,r3,32 1593 or r28,r28,r3 15941: mtlr r28 1595 blr 1596 1597_GLOBAL(book3e_secondary_thread_init) 1598 mflr r28 1599 b 3b 1600 1601 .globl init_core_book3e 1602init_core_book3e: 1603 /* Establish the interrupt vector base */ 1604 tovirt(r2,r2) 1605 LOAD_REG_ADDR(r3, interrupt_base_book3e) 1606 mtspr SPRN_IVPR,r3 1607 sync 1608 blr 1609 1610init_thread_book3e: 1611 lis r3,(SPRN_EPCR_ICM | SPRN_EPCR_GICM)@h 1612 mtspr SPRN_EPCR,r3 1613 1614 /* Make sure interrupts are off */ 1615 wrteei 0 1616 1617 /* disable all timers and clear out status */ 1618 li r3,0 1619 mtspr SPRN_TCR,r3 1620 mfspr r3,SPRN_TSR 1621 mtspr SPRN_TSR,r3 1622 1623 blr 1624 1625_GLOBAL(__setup_base_ivors) 1626 SET_IVOR(0, 0x020) /* Critical Input */ 1627 SET_IVOR(1, 0x000) /* Machine Check */ 1628 SET_IVOR(2, 0x060) /* Data Storage */ 1629 SET_IVOR(3, 0x080) /* Instruction Storage */ 1630 SET_IVOR(4, 0x0a0) /* External Input */ 1631 SET_IVOR(5, 0x0c0) /* Alignment */ 1632 SET_IVOR(6, 0x0e0) /* Program */ 1633 SET_IVOR(7, 0x100) /* FP Unavailable */ 1634 SET_IVOR(8, 0x120) /* System Call */ 1635 SET_IVOR(9, 0x140) /* Auxiliary Processor Unavailable */ 1636 SET_IVOR(10, 0x160) /* Decrementer */ 1637 SET_IVOR(11, 0x180) /* Fixed Interval Timer */ 1638 SET_IVOR(12, 0x1a0) /* Watchdog Timer */ 1639 SET_IVOR(13, 0x1c0) /* Data TLB Error */ 1640 SET_IVOR(14, 0x1e0) /* Instruction TLB Error */ 1641 SET_IVOR(15, 0x040) /* Debug */ 1642 1643 sync 1644 1645 blr 1646 1647_GLOBAL(setup_altivec_ivors) 1648 SET_IVOR(32, 0x200) /* AltiVec Unavailable */ 1649 SET_IVOR(33, 0x220) /* AltiVec Assist */ 1650 blr 1651 1652_GLOBAL(setup_perfmon_ivor) 1653 SET_IVOR(35, 0x260) /* Performance Monitor */ 1654 blr 1655 1656_GLOBAL(setup_doorbell_ivors) 1657 SET_IVOR(36, 0x280) /* Processor Doorbell */ 1658 SET_IVOR(37, 0x2a0) /* Processor Doorbell Crit */ 1659 blr 1660 1661_GLOBAL(setup_ehv_ivors) 1662 SET_IVOR(40, 0x300) /* Embedded Hypervisor System Call */ 1663 SET_IVOR(41, 0x320) /* Embedded Hypervisor Privilege */ 1664 SET_IVOR(38, 0x2c0) /* Guest Processor Doorbell */ 1665 SET_IVOR(39, 0x2e0) /* Guest Processor Doorbell Crit/MC */ 1666 blr 1667 1668_GLOBAL(setup_lrat_ivor) 1669 SET_IVOR(42, 0x340) /* LRAT Error */ 1670 blr 1671