1 #ifndef _ASM_POWERPC_EXCEPTION_H 2 #define _ASM_POWERPC_EXCEPTION_H 3 /* 4 * Extracted from head_64.S 5 * 6 * PowerPC version 7 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) 8 * 9 * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP 10 * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu> 11 * Adapted for Power Macintosh by Paul Mackerras. 12 * Low-level exception handlers and MMU support 13 * rewritten by Paul Mackerras. 14 * Copyright (C) 1996 Paul Mackerras. 15 * 16 * Adapted for 64bit PowerPC by Dave Engebretsen, Peter Bergner, and 17 * Mike Corrigan {engebret|bergner|mikejc}@us.ibm.com 18 * 19 * This file contains the low-level support and setup for the 20 * PowerPC-64 platform, including trap and interrupt dispatch. 21 * 22 * This program is free software; you can redistribute it and/or 23 * modify it under the terms of the GNU General Public License 24 * as published by the Free Software Foundation; either version 25 * 2 of the License, or (at your option) any later version. 26 */ 27 /* 28 * The following macros define the code that appears as 29 * the prologue to each of the exception handlers. They 30 * are split into two parts to allow a single kernel binary 31 * to be used for pSeries and iSeries. 32 * 33 * We make as much of the exception code common between native 34 * exception handlers (including pSeries LPAR) and iSeries LPAR 35 * implementations as possible. 36 */ 37 #include <asm/head-64.h> 38 39 #define EX_R9 0 40 #define EX_R10 8 41 #define EX_R11 16 42 #define EX_R12 24 43 #define EX_R13 32 44 #define EX_SRR0 40 45 #define EX_DAR 48 46 #define EX_DSISR 56 47 #define EX_CCR 60 48 #define EX_R3 64 49 #define EX_LR 72 50 #define EX_CFAR 80 51 #define EX_PPR 88 /* SMT thread status register (priority) */ 52 #define EX_CTR 96 53 54 #ifdef CONFIG_RELOCATABLE 55 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 56 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 57 LOAD_HANDLER(r12,label); \ 58 mtctr r12; \ 59 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 60 li r10,MSR_RI; \ 61 mtmsrd r10,1; /* Set RI (EE=0) */ \ 62 bctr; 63 #else 64 /* If not relocatable, we can jump directly -- and save messing with LR */ 65 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 66 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 67 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 68 li r10,MSR_RI; \ 69 mtmsrd r10,1; /* Set RI (EE=0) */ \ 70 b label; 71 #endif 72 #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 73 __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 74 75 /* 76 * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on 77 * so no need to rfid. Save lr in case we're CONFIG_RELOCATABLE, in which 78 * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr. 79 */ 80 #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec) \ 81 EXCEPTION_PROLOG_0(area); \ 82 EXCEPTION_PROLOG_1(area, extra, vec); \ 83 EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 84 85 /* 86 * We're short on space and time in the exception prolog, so we can't 87 * use the normal LOAD_REG_IMMEDIATE macro to load the address of label. 88 * Instead we get the base of the kernel from paca->kernelbase and or in the low 89 * part of label. This requires that the label be within 64KB of kernelbase, and 90 * that kernelbase be 64K aligned. 91 */ 92 #define LOAD_HANDLER(reg, label) \ 93 ld reg,PACAKBASE(r13); /* get high part of &label */ \ 94 ori reg,reg,FIXED_SYMBOL_ABS_ADDR(label); 95 96 #define __LOAD_HANDLER(reg, label) \ 97 ld reg,PACAKBASE(r13); \ 98 ori reg,reg,(ABS_ADDR(label))@l; 99 100 /* Exception register prefixes */ 101 #define EXC_HV H 102 #define EXC_STD 103 104 #if defined(CONFIG_RELOCATABLE) 105 /* 106 * If we support interrupts with relocation on AND we're a relocatable kernel, 107 * we need to use CTR to get to the 2nd level handler. So, save/restore it 108 * when required. 109 */ 110 #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13) 111 #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13) 112 #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg 113 #else 114 /* ...else CTR is unused and in register. */ 115 #define SAVE_CTR(reg, area) 116 #define GET_CTR(reg, area) mfctr reg 117 #define RESTORE_CTR(reg, area) 118 #endif 119 120 /* 121 * PPR save/restore macros used in exceptions_64s.S 122 * Used for P7 or later processors 123 */ 124 #define SAVE_PPR(area, ra, rb) \ 125 BEGIN_FTR_SECTION_NESTED(940) \ 126 ld ra,PACACURRENT(r13); \ 127 ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \ 128 std rb,TASKTHREADPPR(ra); \ 129 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 130 131 #define RESTORE_PPR_PACA(area, ra) \ 132 BEGIN_FTR_SECTION_NESTED(941) \ 133 ld ra,area+EX_PPR(r13); \ 134 mtspr SPRN_PPR,ra; \ 135 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 136 137 /* 138 * Get an SPR into a register if the CPU has the given feature 139 */ 140 #define OPT_GET_SPR(ra, spr, ftr) \ 141 BEGIN_FTR_SECTION_NESTED(943) \ 142 mfspr ra,spr; \ 143 END_FTR_SECTION_NESTED(ftr,ftr,943) 144 145 /* 146 * Set an SPR from a register if the CPU has the given feature 147 */ 148 #define OPT_SET_SPR(ra, spr, ftr) \ 149 BEGIN_FTR_SECTION_NESTED(943) \ 150 mtspr spr,ra; \ 151 END_FTR_SECTION_NESTED(ftr,ftr,943) 152 153 /* 154 * Save a register to the PACA if the CPU has the given feature 155 */ 156 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \ 157 BEGIN_FTR_SECTION_NESTED(943) \ 158 std ra,offset(r13); \ 159 END_FTR_SECTION_NESTED(ftr,ftr,943) 160 161 #define EXCEPTION_PROLOG_0_PACA(area) \ 162 std r9,area+EX_R9(r13); /* save r9 */ \ 163 OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 164 HMT_MEDIUM; \ 165 std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 166 OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 167 168 #define EXCEPTION_PROLOG_0(area) \ 169 GET_PACA(r13); \ 170 EXCEPTION_PROLOG_0_PACA(area) 171 172 #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 173 OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 174 OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 175 SAVE_CTR(r10, area); \ 176 mfcr r9; \ 177 extra(vec); \ 178 std r11,area+EX_R11(r13); \ 179 std r12,area+EX_R12(r13); \ 180 GET_SCRATCH0(r10); \ 181 std r10,area+EX_R13(r13) 182 #define EXCEPTION_PROLOG_1(area, extra, vec) \ 183 __EXCEPTION_PROLOG_1(area, extra, vec) 184 185 #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 186 ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 187 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 188 LOAD_HANDLER(r12,label) \ 189 mtspr SPRN_##h##SRR0,r12; \ 190 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 191 mtspr SPRN_##h##SRR1,r10; \ 192 h##rfid; \ 193 b . /* prevent speculative execution */ 194 #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 195 __EXCEPTION_PROLOG_PSERIES_1(label, h) 196 197 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 198 EXCEPTION_PROLOG_0(area); \ 199 EXCEPTION_PROLOG_1(area, extra, vec); \ 200 EXCEPTION_PROLOG_PSERIES_1(label, h); 201 202 /* Have the PACA in r13 already */ 203 #define EXCEPTION_PROLOG_PSERIES_PACA(area, label, h, extra, vec) \ 204 EXCEPTION_PROLOG_0_PACA(area); \ 205 EXCEPTION_PROLOG_1(area, extra, vec); \ 206 EXCEPTION_PROLOG_PSERIES_1(label, h); 207 208 #define __KVMTEST(h, n) \ 209 lbz r10,HSTATE_IN_GUEST(r13); \ 210 cmpwi r10,0; \ 211 bne do_kvm_##h##n 212 213 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 214 /* 215 * If hv is possible, interrupts come into to the hv version 216 * of the kvmppc_interrupt code, which then jumps to the PR handler, 217 * kvmppc_interrupt_pr, if the guest is a PR guest. 218 */ 219 #define kvmppc_interrupt kvmppc_interrupt_hv 220 #else 221 #define kvmppc_interrupt kvmppc_interrupt_pr 222 #endif 223 224 #ifdef CONFIG_RELOCATABLE 225 #define BRANCH_TO_COMMON(reg, label) \ 226 __LOAD_HANDLER(reg, label); \ 227 mtctr reg; \ 228 bctr 229 230 #else 231 #define BRANCH_TO_COMMON(reg, label) \ 232 b label 233 234 #endif 235 236 #define __KVM_HANDLER(area, h, n) \ 237 BEGIN_FTR_SECTION_NESTED(947) \ 238 ld r10,area+EX_CFAR(r13); \ 239 std r10,HSTATE_CFAR(r13); \ 240 END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 241 BEGIN_FTR_SECTION_NESTED(948) \ 242 ld r10,area+EX_PPR(r13); \ 243 std r10,HSTATE_PPR(r13); \ 244 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 245 ld r10,area+EX_R10(r13); \ 246 std r12,HSTATE_SCRATCH0(r13); \ 247 sldi r12,r9,32; \ 248 ori r12,r12,(n); \ 249 ld r9,area+EX_R9(r13); \ 250 b kvmppc_interrupt 251 252 #define __KVM_HANDLER_SKIP(area, h, n) \ 253 cmpwi r10,KVM_GUEST_MODE_SKIP; \ 254 beq 89f; \ 255 BEGIN_FTR_SECTION_NESTED(948) \ 256 ld r10,area+EX_PPR(r13); \ 257 std r10,HSTATE_PPR(r13); \ 258 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 259 ld r10,area+EX_R10(r13); \ 260 std r12,HSTATE_SCRATCH0(r13); \ 261 sldi r12,r9,32; \ 262 ori r12,r12,(n); \ 263 ld r9,area+EX_R9(r13); \ 264 b kvmppc_interrupt; \ 265 89: mtocrf 0x80,r9; \ 266 ld r9,area+EX_R9(r13); \ 267 ld r10,area+EX_R10(r13); \ 268 b kvmppc_skip_##h##interrupt 269 270 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 271 #define KVMTEST(h, n) __KVMTEST(h, n) 272 #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 273 #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 274 275 #else 276 #define KVMTEST(h, n) 277 #define KVM_HANDLER(area, h, n) 278 #define KVM_HANDLER_SKIP(area, h, n) 279 #endif 280 281 #define NOTEST(n) 282 283 /* 284 * The common exception prolog is used for all except a few exceptions 285 * such as a segment miss on a kernel address. We have to be prepared 286 * to take another exception from the point where we first touch the 287 * kernel stack onwards. 288 * 289 * On entry r13 points to the paca, r9-r13 are saved in the paca, 290 * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 291 * SRR1, and relocation is on. 292 */ 293 #define EXCEPTION_PROLOG_COMMON(n, area) \ 294 andi. r10,r12,MSR_PR; /* See if coming from user */ \ 295 mr r10,r1; /* Save r1 */ \ 296 subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 297 beq- 1f; \ 298 ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 299 1: cmpdi cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace */ \ 300 blt+ cr1,3f; /* abort if it is */ \ 301 li r1,(n); /* will be reloaded later */ \ 302 sth r1,PACA_TRAP_SAVE(r13); \ 303 std r3,area+EX_R3(r13); \ 304 addi r3,r13,area; /* r3 -> where regs are saved*/ \ 305 RESTORE_CTR(r1, area); \ 306 b bad_stack; \ 307 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 308 std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 309 std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 310 std r10,0(r1); /* make stack chain pointer */ \ 311 std r0,GPR0(r1); /* save r0 in stackframe */ \ 312 std r10,GPR1(r1); /* save r1 in stackframe */ \ 313 beq 4f; /* if from kernel mode */ \ 314 ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \ 315 SAVE_PPR(area, r9, r10); \ 316 4: EXCEPTION_PROLOG_COMMON_2(area) \ 317 EXCEPTION_PROLOG_COMMON_3(n) \ 318 ACCOUNT_STOLEN_TIME 319 320 /* Save original regs values from save area to stack frame. */ 321 #define EXCEPTION_PROLOG_COMMON_2(area) \ 322 ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 323 ld r10,area+EX_R10(r13); \ 324 std r9,GPR9(r1); \ 325 std r10,GPR10(r1); \ 326 ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 327 ld r10,area+EX_R12(r13); \ 328 ld r11,area+EX_R13(r13); \ 329 std r9,GPR11(r1); \ 330 std r10,GPR12(r1); \ 331 std r11,GPR13(r1); \ 332 BEGIN_FTR_SECTION_NESTED(66); \ 333 ld r10,area+EX_CFAR(r13); \ 334 std r10,ORIG_GPR3(r1); \ 335 END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 336 GET_CTR(r10, area); \ 337 std r10,_CTR(r1); 338 339 #define EXCEPTION_PROLOG_COMMON_3(n) \ 340 std r2,GPR2(r1); /* save r2 in stackframe */ \ 341 SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 342 SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 343 mflr r9; /* Get LR, later save to stack */ \ 344 ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 345 std r9,_LINK(r1); \ 346 lbz r10,PACASOFTIRQEN(r13); \ 347 mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 348 std r10,SOFTE(r1); \ 349 std r11,_XER(r1); \ 350 li r9,(n)+1; \ 351 std r9,_TRAP(r1); /* set trap number */ \ 352 li r10,0; \ 353 ld r11,exception_marker@toc(r2); \ 354 std r10,RESULT(r1); /* clear regs->result */ \ 355 std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ 356 357 /* 358 * Exception vectors. 359 */ 360 #define STD_EXCEPTION_PSERIES(vec, label) \ 361 SET_SCRATCH0(r13); /* save r13 */ \ 362 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 363 EXC_STD, KVMTEST_PR, vec); \ 364 365 /* Version of above for when we have to branch out-of-line */ 366 #define __OOL_EXCEPTION(vec, label, hdlr) \ 367 SET_SCRATCH0(r13) \ 368 EXCEPTION_PROLOG_0(PACA_EXGEN) \ 369 b hdlr; 370 371 #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 372 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 373 EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 374 375 #define STD_EXCEPTION_HV(loc, vec, label) \ 376 SET_SCRATCH0(r13); /* save r13 */ \ 377 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label, \ 378 EXC_HV, KVMTEST_HV, vec); 379 380 #define STD_EXCEPTION_HV_OOL(vec, label) \ 381 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec); \ 382 EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 383 384 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 385 /* No guest interrupts come through here */ \ 386 SET_SCRATCH0(r13); /* save r13 */ \ 387 EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec); 388 389 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 390 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 391 EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD) 392 393 #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 394 /* No guest interrupts come through here */ \ 395 SET_SCRATCH0(r13); /* save r13 */ \ 396 EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_HV, NOTEST, vec); 397 398 #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 399 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 400 EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV) 401 402 /* This associate vector numbers with bits in paca->irq_happened */ 403 #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 404 #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 405 #define SOFTEN_VALUE_0x980 PACA_IRQ_DEC 406 #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 407 #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 408 #define SOFTEN_VALUE_0xe60 PACA_IRQ_HMI 409 #define SOFTEN_VALUE_0xea0 PACA_IRQ_EE 410 411 #define __SOFTEN_TEST(h, vec) \ 412 lbz r10,PACASOFTIRQEN(r13); \ 413 cmpwi r10,0; \ 414 li r10,SOFTEN_VALUE_##vec; \ 415 beq masked_##h##interrupt 416 417 #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 418 419 #define SOFTEN_TEST_PR(vec) \ 420 KVMTEST(EXC_STD, vec); \ 421 _SOFTEN_TEST(EXC_STD, vec) 422 423 #define SOFTEN_TEST_HV(vec) \ 424 KVMTEST(EXC_HV, vec); \ 425 _SOFTEN_TEST(EXC_HV, vec) 426 427 #define KVMTEST_PR(vec) \ 428 KVMTEST(EXC_STD, vec) 429 430 #define KVMTEST_HV(vec) \ 431 KVMTEST(EXC_HV, vec) 432 433 #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 434 #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 435 436 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 437 SET_SCRATCH0(r13); /* save r13 */ \ 438 EXCEPTION_PROLOG_0(PACA_EXGEN); \ 439 __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 440 EXCEPTION_PROLOG_PSERIES_1(label, h); 441 442 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 443 __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 444 445 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 446 _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 447 EXC_STD, SOFTEN_TEST_PR) 448 449 #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label) \ 450 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec); \ 451 EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD) 452 453 #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 454 _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 455 EXC_HV, SOFTEN_TEST_HV) 456 457 #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 458 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 459 EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 460 461 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 462 SET_SCRATCH0(r13); /* save r13 */ \ 463 EXCEPTION_PROLOG_0(PACA_EXGEN); \ 464 __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 465 EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) 466 467 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 468 __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 469 470 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 471 _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 472 EXC_STD, SOFTEN_NOTEST_PR) 473 474 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 475 _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 476 EXC_HV, SOFTEN_NOTEST_HV) 477 478 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 479 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \ 480 EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV) 481 482 /* 483 * Our exception common code can be passed various "additions" 484 * to specify the behaviour of interrupts, whether to kick the 485 * runlatch, etc... 486 */ 487 488 /* 489 * This addition reconciles our actual IRQ state with the various software 490 * flags that track it. This may call C code. 491 */ 492 #define ADD_RECONCILE RECONCILE_IRQ_STATE(r10,r11) 493 494 #define ADD_NVGPRS \ 495 bl save_nvgprs 496 497 #define RUNLATCH_ON \ 498 BEGIN_FTR_SECTION \ 499 CURRENT_THREAD_INFO(r3, r1); \ 500 ld r4,TI_LOCAL_FLAGS(r3); \ 501 andi. r0,r4,_TLF_RUNLATCH; \ 502 beql ppc64_runlatch_on_trampoline; \ 503 END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 504 505 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 506 EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 507 /* Volatile regs are potentially clobbered here */ \ 508 additions; \ 509 addi r3,r1,STACK_FRAME_OVERHEAD; \ 510 bl hdlr; \ 511 b ret 512 513 #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 514 EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 515 ADD_NVGPRS;ADD_RECONCILE) 516 517 /* 518 * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 519 * in the idle task and therefore need the special idle handling 520 * (finish nap and runlatch) 521 */ 522 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 523 EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 524 FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON) 525 526 /* 527 * When the idle code in power4_idle puts the CPU into NAP mode, 528 * it has to do so in a loop, and relies on the external interrupt 529 * and decrementer interrupt entry code to get it out of the loop. 530 * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 531 * to signal that it is in the loop and needs help to get out. 532 */ 533 #ifdef CONFIG_PPC_970_NAP 534 #define FINISH_NAP \ 535 BEGIN_FTR_SECTION \ 536 CURRENT_THREAD_INFO(r11, r1); \ 537 ld r9,TI_LOCAL_FLAGS(r11); \ 538 andi. r10,r9,_TLF_NAPPING; \ 539 bnel power4_fixup_nap; \ 540 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 541 #else 542 #define FINISH_NAP 543 #endif 544 545 #endif /* _ASM_POWERPC_EXCEPTION_H */ 546