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 38 #define EX_R9 0 39 #define EX_R10 8 40 #define EX_R11 16 41 #define EX_R12 24 42 #define EX_R13 32 43 #define EX_SRR0 40 44 #define EX_DAR 48 45 #define EX_DSISR 56 46 #define EX_CCR 60 47 #define EX_R3 64 48 #define EX_LR 72 49 #define EX_CFAR 80 50 #define EX_PPR 88 /* SMT thread status register (priority) */ 51 #define EX_CTR 96 52 53 #ifdef CONFIG_RELOCATABLE 54 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h) \ 55 ld r12,PACAKBASE(r13); /* get high part of &label */ \ 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 SET_REG_IMMEDIATE macro. Normally we just need the 88 * low halfword of the address, but for Kdump we need the whole low 89 * word. 90 */ 91 #define LOAD_HANDLER(reg, label) \ 92 /* Handlers must be within 64K of kbase, which must be 64k aligned */ \ 93 ori reg,reg,(label)-_stext; /* virt addr of handler ... */ 94 95 /* Exception register prefixes */ 96 #define EXC_HV H 97 #define EXC_STD 98 99 #if defined(CONFIG_RELOCATABLE) 100 /* 101 * If we support interrupts with relocation on AND we're a relocatable kernel, 102 * we need to use CTR to get to the 2nd level handler. So, save/restore it 103 * when required. 104 */ 105 #define SAVE_CTR(reg, area) mfctr reg ; std reg,area+EX_CTR(r13) 106 #define GET_CTR(reg, area) ld reg,area+EX_CTR(r13) 107 #define RESTORE_CTR(reg, area) ld reg,area+EX_CTR(r13) ; mtctr reg 108 #else 109 /* ...else CTR is unused and in register. */ 110 #define SAVE_CTR(reg, area) 111 #define GET_CTR(reg, area) mfctr reg 112 #define RESTORE_CTR(reg, area) 113 #endif 114 115 /* 116 * PPR save/restore macros used in exceptions_64s.S 117 * Used for P7 or later processors 118 */ 119 #define SAVE_PPR(area, ra, rb) \ 120 BEGIN_FTR_SECTION_NESTED(940) \ 121 ld ra,PACACURRENT(r13); \ 122 ld rb,area+EX_PPR(r13); /* Read PPR from paca */ \ 123 std rb,TASKTHREADPPR(ra); \ 124 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940) 125 126 #define RESTORE_PPR_PACA(area, ra) \ 127 BEGIN_FTR_SECTION_NESTED(941) \ 128 ld ra,area+EX_PPR(r13); \ 129 mtspr SPRN_PPR,ra; \ 130 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941) 131 132 /* 133 * Increase the priority on systems where PPR save/restore is not 134 * implemented/ supported. 135 */ 136 #define HMT_MEDIUM_PPR_DISCARD \ 137 BEGIN_FTR_SECTION_NESTED(942) \ 138 HMT_MEDIUM; \ 139 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,942) /*non P7*/ 140 141 /* 142 * Get an SPR into a register if the CPU has the given feature 143 */ 144 #define OPT_GET_SPR(ra, spr, ftr) \ 145 BEGIN_FTR_SECTION_NESTED(943) \ 146 mfspr ra,spr; \ 147 END_FTR_SECTION_NESTED(ftr,ftr,943) 148 149 /* 150 * Save a register to the PACA if the CPU has the given feature 151 */ 152 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr) \ 153 BEGIN_FTR_SECTION_NESTED(943) \ 154 std ra,offset(r13); \ 155 END_FTR_SECTION_NESTED(ftr,ftr,943) 156 157 #define EXCEPTION_PROLOG_0(area) \ 158 GET_PACA(r13); \ 159 std r9,area+EX_R9(r13); /* save r9 */ \ 160 OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR); \ 161 HMT_MEDIUM; \ 162 std r10,area+EX_R10(r13); /* save r10 - r12 */ \ 163 OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR) 164 165 #define __EXCEPTION_PROLOG_1(area, extra, vec) \ 166 OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR); \ 167 OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR); \ 168 SAVE_CTR(r10, area); \ 169 mfcr r9; \ 170 extra(vec); \ 171 std r11,area+EX_R11(r13); \ 172 std r12,area+EX_R12(r13); \ 173 GET_SCRATCH0(r10); \ 174 std r10,area+EX_R13(r13) 175 #define EXCEPTION_PROLOG_1(area, extra, vec) \ 176 __EXCEPTION_PROLOG_1(area, extra, vec) 177 178 #define __EXCEPTION_PROLOG_PSERIES_1(label, h) \ 179 ld r12,PACAKBASE(r13); /* get high part of &label */ \ 180 ld r10,PACAKMSR(r13); /* get MSR value for kernel */ \ 181 mfspr r11,SPRN_##h##SRR0; /* save SRR0 */ \ 182 LOAD_HANDLER(r12,label) \ 183 mtspr SPRN_##h##SRR0,r12; \ 184 mfspr r12,SPRN_##h##SRR1; /* and SRR1 */ \ 185 mtspr SPRN_##h##SRR1,r10; \ 186 h##rfid; \ 187 b . /* prevent speculative execution */ 188 #define EXCEPTION_PROLOG_PSERIES_1(label, h) \ 189 __EXCEPTION_PROLOG_PSERIES_1(label, h) 190 191 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec) \ 192 EXCEPTION_PROLOG_0(area); \ 193 EXCEPTION_PROLOG_1(area, extra, vec); \ 194 EXCEPTION_PROLOG_PSERIES_1(label, h); 195 196 #define __KVMTEST(n) \ 197 lbz r10,HSTATE_IN_GUEST(r13); \ 198 cmpwi r10,0; \ 199 bne do_kvm_##n 200 201 #define __KVM_HANDLER(area, h, n) \ 202 do_kvm_##n: \ 203 BEGIN_FTR_SECTION_NESTED(947) \ 204 ld r10,area+EX_CFAR(r13); \ 205 std r10,HSTATE_CFAR(r13); \ 206 END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947); \ 207 BEGIN_FTR_SECTION_NESTED(948) \ 208 ld r10,area+EX_PPR(r13); \ 209 std r10,HSTATE_PPR(r13); \ 210 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 211 ld r10,area+EX_R10(r13); \ 212 stw r9,HSTATE_SCRATCH1(r13); \ 213 ld r9,area+EX_R9(r13); \ 214 std r12,HSTATE_SCRATCH0(r13); \ 215 li r12,n; \ 216 b kvmppc_interrupt 217 218 #define __KVM_HANDLER_SKIP(area, h, n) \ 219 do_kvm_##n: \ 220 cmpwi r10,KVM_GUEST_MODE_SKIP; \ 221 ld r10,area+EX_R10(r13); \ 222 beq 89f; \ 223 stw r9,HSTATE_SCRATCH1(r13); \ 224 BEGIN_FTR_SECTION_NESTED(948) \ 225 ld r9,area+EX_PPR(r13); \ 226 std r9,HSTATE_PPR(r13); \ 227 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948); \ 228 ld r9,area+EX_R9(r13); \ 229 std r12,HSTATE_SCRATCH0(r13); \ 230 li r12,n; \ 231 b kvmppc_interrupt; \ 232 89: mtocrf 0x80,r9; \ 233 ld r9,area+EX_R9(r13); \ 234 b kvmppc_skip_##h##interrupt 235 236 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER 237 #define KVMTEST(n) __KVMTEST(n) 238 #define KVM_HANDLER(area, h, n) __KVM_HANDLER(area, h, n) 239 #define KVM_HANDLER_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 240 241 #else 242 #define KVMTEST(n) 243 #define KVM_HANDLER(area, h, n) 244 #define KVM_HANDLER_SKIP(area, h, n) 245 #endif 246 247 #ifdef CONFIG_KVM_BOOK3S_PR 248 #define KVMTEST_PR(n) __KVMTEST(n) 249 #define KVM_HANDLER_PR(area, h, n) __KVM_HANDLER(area, h, n) 250 #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n) 251 252 #else 253 #define KVMTEST_PR(n) 254 #define KVM_HANDLER_PR(area, h, n) 255 #define KVM_HANDLER_PR_SKIP(area, h, n) 256 #endif 257 258 #define NOTEST(n) 259 260 /* 261 * The common exception prolog is used for all except a few exceptions 262 * such as a segment miss on a kernel address. We have to be prepared 263 * to take another exception from the point where we first touch the 264 * kernel stack onwards. 265 * 266 * On entry r13 points to the paca, r9-r13 are saved in the paca, 267 * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and 268 * SRR1, and relocation is on. 269 */ 270 #define EXCEPTION_PROLOG_COMMON(n, area) \ 271 andi. r10,r12,MSR_PR; /* See if coming from user */ \ 272 mr r10,r1; /* Save r1 */ \ 273 subi r1,r1,INT_FRAME_SIZE; /* alloc frame on kernel stack */ \ 274 beq- 1f; \ 275 ld r1,PACAKSAVE(r13); /* kernel stack to use */ \ 276 1: cmpdi cr1,r1,0; /* check if r1 is in userspace */ \ 277 blt+ cr1,3f; /* abort if it is */ \ 278 li r1,(n); /* will be reloaded later */ \ 279 sth r1,PACA_TRAP_SAVE(r13); \ 280 std r3,area+EX_R3(r13); \ 281 addi r3,r13,area; /* r3 -> where regs are saved*/ \ 282 RESTORE_CTR(r1, area); \ 283 b bad_stack; \ 284 3: std r9,_CCR(r1); /* save CR in stackframe */ \ 285 std r11,_NIP(r1); /* save SRR0 in stackframe */ \ 286 std r12,_MSR(r1); /* save SRR1 in stackframe */ \ 287 std r10,0(r1); /* make stack chain pointer */ \ 288 std r0,GPR0(r1); /* save r0 in stackframe */ \ 289 std r10,GPR1(r1); /* save r1 in stackframe */ \ 290 beq 4f; /* if from kernel mode */ \ 291 ACCOUNT_CPU_USER_ENTRY(r9, r10); \ 292 SAVE_PPR(area, r9, r10); \ 293 4: std r2,GPR2(r1); /* save r2 in stackframe */ \ 294 SAVE_4GPRS(3, r1); /* save r3 - r6 in stackframe */ \ 295 SAVE_2GPRS(7, r1); /* save r7, r8 in stackframe */ \ 296 ld r9,area+EX_R9(r13); /* move r9, r10 to stackframe */ \ 297 ld r10,area+EX_R10(r13); \ 298 std r9,GPR9(r1); \ 299 std r10,GPR10(r1); \ 300 ld r9,area+EX_R11(r13); /* move r11 - r13 to stackframe */ \ 301 ld r10,area+EX_R12(r13); \ 302 ld r11,area+EX_R13(r13); \ 303 std r9,GPR11(r1); \ 304 std r10,GPR12(r1); \ 305 std r11,GPR13(r1); \ 306 BEGIN_FTR_SECTION_NESTED(66); \ 307 ld r10,area+EX_CFAR(r13); \ 308 std r10,ORIG_GPR3(r1); \ 309 END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66); \ 310 mflr r9; /* Get LR, later save to stack */ \ 311 ld r2,PACATOC(r13); /* get kernel TOC into r2 */ \ 312 std r9,_LINK(r1); \ 313 GET_CTR(r10, area); \ 314 std r10,_CTR(r1); \ 315 lbz r10,PACASOFTIRQEN(r13); \ 316 mfspr r11,SPRN_XER; /* save XER in stackframe */ \ 317 std r10,SOFTE(r1); \ 318 std r11,_XER(r1); \ 319 li r9,(n)+1; \ 320 std r9,_TRAP(r1); /* set trap number */ \ 321 li r10,0; \ 322 ld r11,exception_marker@toc(r2); \ 323 std r10,RESULT(r1); /* clear regs->result */ \ 324 std r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame */ \ 325 ACCOUNT_STOLEN_TIME 326 327 /* 328 * Exception vectors. 329 */ 330 #define STD_EXCEPTION_PSERIES(loc, vec, label) \ 331 . = loc; \ 332 .globl label##_pSeries; \ 333 label##_pSeries: \ 334 HMT_MEDIUM_PPR_DISCARD; \ 335 SET_SCRATCH0(r13); /* save r13 */ \ 336 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 337 EXC_STD, KVMTEST_PR, vec) 338 339 /* Version of above for when we have to branch out-of-line */ 340 #define STD_EXCEPTION_PSERIES_OOL(vec, label) \ 341 .globl label##_pSeries; \ 342 label##_pSeries: \ 343 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec); \ 344 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD) 345 346 #define STD_EXCEPTION_HV(loc, vec, label) \ 347 . = loc; \ 348 .globl label##_hv; \ 349 label##_hv: \ 350 HMT_MEDIUM_PPR_DISCARD; \ 351 SET_SCRATCH0(r13); /* save r13 */ \ 352 EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 353 EXC_HV, KVMTEST, vec) 354 355 /* Version of above for when we have to branch out-of-line */ 356 #define STD_EXCEPTION_HV_OOL(vec, label) \ 357 .globl label##_hv; \ 358 label##_hv: \ 359 EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec); \ 360 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV) 361 362 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 363 . = loc; \ 364 .globl label##_relon_pSeries; \ 365 label##_relon_pSeries: \ 366 HMT_MEDIUM_PPR_DISCARD; \ 367 /* No guest interrupts come through here */ \ 368 SET_SCRATCH0(r13); /* save r13 */ \ 369 EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 370 EXC_STD, NOTEST, vec) 371 372 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label) \ 373 .globl label##_relon_pSeries; \ 374 label##_relon_pSeries: \ 375 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 376 EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD) 377 378 #define STD_RELON_EXCEPTION_HV(loc, vec, label) \ 379 . = loc; \ 380 .globl label##_relon_hv; \ 381 label##_relon_hv: \ 382 HMT_MEDIUM_PPR_DISCARD; \ 383 /* No guest interrupts come through here */ \ 384 SET_SCRATCH0(r13); /* save r13 */ \ 385 EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \ 386 EXC_HV, NOTEST, vec) 387 388 #define STD_RELON_EXCEPTION_HV_OOL(vec, label) \ 389 .globl label##_relon_hv; \ 390 label##_relon_hv: \ 391 EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec); \ 392 EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV) 393 394 /* This associate vector numbers with bits in paca->irq_happened */ 395 #define SOFTEN_VALUE_0x500 PACA_IRQ_EE 396 #define SOFTEN_VALUE_0x502 PACA_IRQ_EE 397 #define SOFTEN_VALUE_0x900 PACA_IRQ_DEC 398 #define SOFTEN_VALUE_0x982 PACA_IRQ_DEC 399 #define SOFTEN_VALUE_0xa00 PACA_IRQ_DBELL 400 #define SOFTEN_VALUE_0xe80 PACA_IRQ_DBELL 401 #define SOFTEN_VALUE_0xe82 PACA_IRQ_DBELL 402 403 #define __SOFTEN_TEST(h, vec) \ 404 lbz r10,PACASOFTIRQEN(r13); \ 405 cmpwi r10,0; \ 406 li r10,SOFTEN_VALUE_##vec; \ 407 beq masked_##h##interrupt 408 #define _SOFTEN_TEST(h, vec) __SOFTEN_TEST(h, vec) 409 410 #define SOFTEN_TEST_PR(vec) \ 411 KVMTEST_PR(vec); \ 412 _SOFTEN_TEST(EXC_STD, vec) 413 414 #define SOFTEN_TEST_HV(vec) \ 415 KVMTEST(vec); \ 416 _SOFTEN_TEST(EXC_HV, vec) 417 418 #define SOFTEN_TEST_HV_201(vec) \ 419 KVMTEST(vec); \ 420 _SOFTEN_TEST(EXC_STD, vec) 421 422 #define SOFTEN_NOTEST_PR(vec) _SOFTEN_TEST(EXC_STD, vec) 423 #define SOFTEN_NOTEST_HV(vec) _SOFTEN_TEST(EXC_HV, vec) 424 425 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 426 SET_SCRATCH0(r13); /* save r13 */ \ 427 EXCEPTION_PROLOG_0(PACA_EXGEN); \ 428 __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 429 EXCEPTION_PROLOG_PSERIES_1(label##_common, h); 430 431 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) \ 432 __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra) 433 434 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label) \ 435 . = loc; \ 436 .globl label##_pSeries; \ 437 label##_pSeries: \ 438 HMT_MEDIUM_PPR_DISCARD; \ 439 _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 440 EXC_STD, SOFTEN_TEST_PR) 441 442 #define MASKABLE_EXCEPTION_HV(loc, vec, label) \ 443 . = loc; \ 444 .globl label##_hv; \ 445 label##_hv: \ 446 _MASKABLE_EXCEPTION_PSERIES(vec, label, \ 447 EXC_HV, SOFTEN_TEST_HV) 448 449 #define MASKABLE_EXCEPTION_HV_OOL(vec, label) \ 450 .globl label##_hv; \ 451 label##_hv: \ 452 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec); \ 453 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV); 454 455 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 456 HMT_MEDIUM_PPR_DISCARD; \ 457 SET_SCRATCH0(r13); /* save r13 */ \ 458 EXCEPTION_PROLOG_0(PACA_EXGEN); \ 459 __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec); \ 460 EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h); 461 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \ 462 __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) 463 464 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label) \ 465 . = loc; \ 466 .globl label##_relon_pSeries; \ 467 label##_relon_pSeries: \ 468 _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 469 EXC_STD, SOFTEN_NOTEST_PR) 470 471 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label) \ 472 . = loc; \ 473 .globl label##_relon_hv; \ 474 label##_relon_hv: \ 475 _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, \ 476 EXC_HV, SOFTEN_NOTEST_HV) 477 478 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label) \ 479 .globl label##_relon_hv; \ 480 label##_relon_hv: \ 481 EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec); \ 482 EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV); 483 484 /* 485 * Our exception common code can be passed various "additions" 486 * to specify the behaviour of interrupts, whether to kick the 487 * runlatch, etc... 488 */ 489 490 /* Exception addition: Hard disable interrupts */ 491 #define DISABLE_INTS RECONCILE_IRQ_STATE(r10,r11) 492 493 #define ADD_NVGPRS \ 494 bl .save_nvgprs 495 496 #define RUNLATCH_ON \ 497 BEGIN_FTR_SECTION \ 498 CURRENT_THREAD_INFO(r3, r1); \ 499 ld r4,TI_LOCAL_FLAGS(r3); \ 500 andi. r0,r4,_TLF_RUNLATCH; \ 501 beql ppc64_runlatch_on_trampoline; \ 502 END_FTR_SECTION_IFSET(CPU_FTR_CTRL) 503 504 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions) \ 505 .align 7; \ 506 .globl label##_common; \ 507 label##_common: \ 508 EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ 509 additions; \ 510 addi r3,r1,STACK_FRAME_OVERHEAD; \ 511 bl hdlr; \ 512 b ret 513 514 #define STD_EXCEPTION_COMMON(trap, label, hdlr) \ 515 EXCEPTION_COMMON(trap, label, hdlr, ret_from_except, \ 516 ADD_NVGPRS;DISABLE_INTS) 517 518 /* 519 * Like STD_EXCEPTION_COMMON, but for exceptions that can occur 520 * in the idle task and therefore need the special idle handling 521 * (finish nap and runlatch) 522 */ 523 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr) \ 524 EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \ 525 FINISH_NAP;DISABLE_INTS;RUNLATCH_ON) 526 527 /* 528 * When the idle code in power4_idle puts the CPU into NAP mode, 529 * it has to do so in a loop, and relies on the external interrupt 530 * and decrementer interrupt entry code to get it out of the loop. 531 * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags 532 * to signal that it is in the loop and needs help to get out. 533 */ 534 #ifdef CONFIG_PPC_970_NAP 535 #define FINISH_NAP \ 536 BEGIN_FTR_SECTION \ 537 CURRENT_THREAD_INFO(r11, r1); \ 538 ld r9,TI_LOCAL_FLAGS(r11); \ 539 andi. r10,r9,_TLF_NAPPING; \ 540 bnel power4_fixup_nap; \ 541 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP) 542 #else 543 #define FINISH_NAP 544 #endif 545 546 #endif /* _ASM_POWERPC_EXCEPTION_H */ 547