arch/powerpc/include/asm/exception-64s.h

   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_PROLOG(area, 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         stw     r9,HSTATE_SCRATCH1(r13);                                \
 247         ld      r9,area+EX_R9(r13);                                     \
 248         std     r12,HSTATE_SCRATCH0(r13);                               \
 249
 250 #define __KVM_HANDLER(area, h, n)                                       \
 251         __KVM_HANDLER_PROLOG(area, n)                                   \
 252         li      r12,n;                                                  \
 253         b       kvmppc_interrupt
 254
 255 #define __KVM_HANDLER_SKIP(area, h, n)                                  \
 256         cmpwi   r10,KVM_GUEST_MODE_SKIP;                                \
 257         ld      r10,area+EX_R10(r13);                                   \
 258         beq     89f;                                                    \
 259         stw     r9,HSTATE_SCRATCH1(r13);                                \
 260         BEGIN_FTR_SECTION_NESTED(948)                                   \
 261         ld      r9,area+EX_PPR(r13);                                    \
 262         std     r9,HSTATE_PPR(r13);                                     \
 263         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 264         ld      r9,area+EX_R9(r13);                                     \
 265         std     r12,HSTATE_SCRATCH0(r13);                               \
 266         li      r12,n;                                                  \
 267         b       kvmppc_interrupt;                                       \
 268 89:     mtocrf  0x80,r9;                                                \
 269         ld      r9,area+EX_R9(r13);                                     \
 270         b       kvmppc_skip_##h##interrupt
 271
 272 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 273 #define KVMTEST(h, n)                   __KVMTEST(h, n)
 274 #define KVM_HANDLER(area, h, n)         __KVM_HANDLER(area, h, n)
 275 #define KVM_HANDLER_SKIP(area, h, n)    __KVM_HANDLER_SKIP(area, h, n)
 276
 277 #else
 278 #define KVMTEST(h, n)
 279 #define KVM_HANDLER(area, h, n)
 280 #define KVM_HANDLER_SKIP(area, h, n)
 281 #endif
 282
 283 #define NOTEST(n)
 284
 285 /*
 286  * The common exception prolog is used for all except a few exceptions
 287  * such as a segment miss on a kernel address.  We have to be prepared
 288  * to take another exception from the point where we first touch the
 289  * kernel stack onwards.
 290  *
 291  * On entry r13 points to the paca, r9-r13 are saved in the paca,
 292  * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
 293  * SRR1, and relocation is on.
 294  */
 295 #define EXCEPTION_PROLOG_COMMON(n, area)                                   \
 296         andi.   r10,r12,MSR_PR;         /* See if coming from user      */ \
 297         mr      r10,r1;                 /* Save r1                      */ \
 298         subi    r1,r1,INT_FRAME_SIZE;   /* alloc frame on kernel stack  */ \
 299         beq-    1f;                                                        \
 300         ld      r1,PACAKSAVE(r13);      /* kernel stack to use          */ \
 301 1:      cmpdi   cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace  */ \
 302         blt+    cr1,3f;                 /* abort if it is               */ \
 303         li      r1,(n);                 /* will be reloaded later       */ \
 304         sth     r1,PACA_TRAP_SAVE(r13);                                    \
 305         std     r3,area+EX_R3(r13);                                        \
 306         addi    r3,r13,area;            /* r3 -> where regs are saved*/    \
 307         RESTORE_CTR(r1, area);                                             \
 308         b       bad_stack;                                                 \
 309 3:      std     r9,_CCR(r1);            /* save CR in stackframe        */ \
 310         std     r11,_NIP(r1);           /* save SRR0 in stackframe      */ \
 311         std     r12,_MSR(r1);           /* save SRR1 in stackframe      */ \
 312         std     r10,0(r1);              /* make stack chain pointer     */ \
 313         std     r0,GPR0(r1);            /* save r0 in stackframe        */ \
 314         std     r10,GPR1(r1);           /* save r1 in stackframe        */ \
 315         beq     4f;                     /* if from kernel mode          */ \
 316         ACCOUNT_CPU_USER_ENTRY(r13, r9, r10);                              \
 317         SAVE_PPR(area, r9, r10);                                           \
 318 4:      EXCEPTION_PROLOG_COMMON_2(area)                                    \
 319         EXCEPTION_PROLOG_COMMON_3(n)                                       \
 320         ACCOUNT_STOLEN_TIME
 321
 322 /* Save original regs values from save area to stack frame. */
 323 #define EXCEPTION_PROLOG_COMMON_2(area)                                    \
 324         ld      r9,area+EX_R9(r13);     /* move r9, r10 to stackframe   */ \
 325         ld      r10,area+EX_R10(r13);                                      \
 326         std     r9,GPR9(r1);                                               \
 327         std     r10,GPR10(r1);                                             \
 328         ld      r9,area+EX_R11(r13);    /* move r11 - r13 to stackframe */ \
 329         ld      r10,area+EX_R12(r13);                                      \
 330         ld      r11,area+EX_R13(r13);                                      \
 331         std     r9,GPR11(r1);                                              \
 332         std     r10,GPR12(r1);                                             \
 333         std     r11,GPR13(r1);                                             \
 334         BEGIN_FTR_SECTION_NESTED(66);                                      \
 335         ld      r10,area+EX_CFAR(r13);                                     \
 336         std     r10,ORIG_GPR3(r1);                                         \
 337         END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66);            \
 338         GET_CTR(r10, area);                                                \
 339         std     r10,_CTR(r1);
 340
 341 #define EXCEPTION_PROLOG_COMMON_3(n)                                       \
 342         std     r2,GPR2(r1);            /* save r2 in stackframe        */ \
 343         SAVE_4GPRS(3, r1);              /* save r3 - r6 in stackframe   */ \
 344         SAVE_2GPRS(7, r1);              /* save r7, r8 in stackframe    */ \
 345         mflr    r9;                     /* Get LR, later save to stack  */ \
 346         ld      r2,PACATOC(r13);        /* get kernel TOC into r2       */ \
 347         std     r9,_LINK(r1);                                              \
 348         lbz     r10,PACASOFTIRQEN(r13);                            \
 349         mfspr   r11,SPRN_XER;           /* save XER in stackframe       */ \
 350         std     r10,SOFTE(r1);                                             \
 351         std     r11,_XER(r1);                                              \
 352         li      r9,(n)+1;                                                  \
 353         std     r9,_TRAP(r1);           /* set trap number              */ \
 354         li      r10,0;                                                     \
 355         ld      r11,exception_marker@toc(r2);                              \
 356         std     r10,RESULT(r1);         /* clear regs->result           */ \
 357         std     r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame      */
 358
 359 /*
 360  * Exception vectors.
 361  */
 362 #define STD_EXCEPTION_PSERIES(vec, label)                       \
 363         SET_SCRATCH0(r13);              /* save r13 */          \
 364         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label,             \
 365                                  EXC_STD, KVMTEST_PR, vec);     \
 366
 367 /* Version of above for when we have to branch out-of-line */
 368 #define __OOL_EXCEPTION(vec, label, hdlr)                       \
 369         SET_SCRATCH0(r13)                                       \
 370         EXCEPTION_PROLOG_0(PACA_EXGEN)                          \
 371         b hdlr;
 372
 373 #define STD_EXCEPTION_PSERIES_OOL(vec, label)                   \
 374         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec);        \
 375         EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 376
 377 #define STD_EXCEPTION_HV(loc, vec, label)                       \
 378         SET_SCRATCH0(r13);      /* save r13 */                  \
 379         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label,             \
 380                                  EXC_HV, KVMTEST_HV, vec);
 381
 382 #define STD_EXCEPTION_HV_OOL(vec, label)                        \
 383         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec);        \
 384         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 385
 386 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label)    \
 387         /* No guest interrupts come through here */     \
 388         SET_SCRATCH0(r13);              /* save r13 */  \
 389         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec);
 390
 391 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label)             \
 392         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 393         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD)
 394
 395 #define STD_RELON_EXCEPTION_HV(loc, vec, label)         \
 396         /* No guest interrupts come through here */     \
 397         SET_SCRATCH0(r13);      /* save r13 */          \
 398         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_HV, NOTEST, vec);
 399
 400 #define STD_RELON_EXCEPTION_HV_OOL(vec, label)                  \
 401         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 402         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV)
 403
 404 /* This associate vector numbers with bits in paca->irq_happened */
 405 #define SOFTEN_VALUE_0x500      PACA_IRQ_EE
 406 #define SOFTEN_VALUE_0x900      PACA_IRQ_DEC
 407 #define SOFTEN_VALUE_0x980      PACA_IRQ_DEC
 408 #define SOFTEN_VALUE_0xa00      PACA_IRQ_DBELL
 409 #define SOFTEN_VALUE_0xe80      PACA_IRQ_DBELL
 410 #define SOFTEN_VALUE_0xe60      PACA_IRQ_HMI
 411 #define SOFTEN_VALUE_0xea0      PACA_IRQ_EE
 412
 413 #define __SOFTEN_TEST(h, vec)                                           \
 414         lbz     r10,PACASOFTIRQEN(r13);                                 \
 415         cmpwi   r10,0;                                                  \
 416         li      r10,SOFTEN_VALUE_##vec;                                 \
 417         beq     masked_##h##interrupt
 418
 419 #define _SOFTEN_TEST(h, vec)    __SOFTEN_TEST(h, vec)
 420
 421 #define SOFTEN_TEST_PR(vec)                                             \
 422         KVMTEST(EXC_STD, vec);                                          \
 423         _SOFTEN_TEST(EXC_STD, vec)
 424
 425 #define SOFTEN_TEST_HV(vec)                                             \
 426         KVMTEST(EXC_HV, vec);                                           \
 427         _SOFTEN_TEST(EXC_HV, vec)
 428
 429 #define KVMTEST_PR(vec)                                                 \
 430         KVMTEST(EXC_STD, vec)
 431
 432 #define KVMTEST_HV(vec)                                                 \
 433         KVMTEST(EXC_HV, vec)
 434
 435 #define SOFTEN_NOTEST_PR(vec)           _SOFTEN_TEST(EXC_STD, vec)
 436 #define SOFTEN_NOTEST_HV(vec)           _SOFTEN_TEST(EXC_HV, vec)
 437
 438 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)              \
 439         SET_SCRATCH0(r13);    /* save r13 */                            \
 440         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 441         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 442         EXCEPTION_PROLOG_PSERIES_1(label, h);
 443
 444 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)               \
 445         __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
 446
 447 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label)                     \
 448         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 449                                     EXC_STD, SOFTEN_TEST_PR)
 450
 451 #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label)                      \
 452         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec);            \
 453         EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 454
 455 #define MASKABLE_EXCEPTION_HV(loc, vec, label)                          \
 456         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 457                                     EXC_HV, SOFTEN_TEST_HV)
 458
 459 #define MASKABLE_EXCEPTION_HV_OOL(vec, label)                           \
 460         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec);            \
 461         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 462
 463 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)        \
 464         SET_SCRATCH0(r13);    /* save r13 */                            \
 465         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 466         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 467         EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)
 468
 469 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)         \
 470         __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)
 471
 472 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label)               \
 473         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 474                                           EXC_STD, SOFTEN_NOTEST_PR)
 475
 476 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label)                    \
 477         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 478                                           EXC_HV, SOFTEN_NOTEST_HV)
 479
 480 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label)                     \
 481         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec);          \
 482         EXCEPTION_PROLOG_PSERIES_1(label, 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 /*
 491  * This addition reconciles our actual IRQ state with the various software
 492  * flags that track it. This may call C code.
 493  */
 494 #define ADD_RECONCILE   RECONCILE_IRQ_STATE(r10,r11)
 495
 496 #define ADD_NVGPRS                              \
 497         bl      save_nvgprs
 498
 499 #define RUNLATCH_ON                             \
 500 BEGIN_FTR_SECTION                               \
 501         CURRENT_THREAD_INFO(r3, r1);            \
 502         ld      r4,TI_LOCAL_FLAGS(r3);          \
 503         andi.   r0,r4,_TLF_RUNLATCH;            \
 504         beql    ppc64_runlatch_on_trampoline;   \
 505 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
 506
 507 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions)     \
 508         EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN);              \
 509         /* Volatile regs are potentially clobbered here */      \
 510         additions;                                              \
 511         addi    r3,r1,STACK_FRAME_OVERHEAD;                     \
 512         bl      hdlr;                                           \
 513         b       ret
 514
 515 #define STD_EXCEPTION_COMMON(trap, label, hdlr)                 \
 516         EXCEPTION_COMMON(trap, label, hdlr, ret_from_except,    \
 517                          ADD_NVGPRS;ADD_RECONCILE)
 518
 519 /*
 520  * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
 521  * in the idle task and therefore need the special idle handling
 522  * (finish nap and runlatch)
 523  */
 524 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr)             \
 525         EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
 526                          FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
 527
 528 /*
 529  * When the idle code in power4_idle puts the CPU into NAP mode,
 530  * it has to do so in a loop, and relies on the external interrupt
 531  * and decrementer interrupt entry code to get it out of the loop.
 532  * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
 533  * to signal that it is in the loop and needs help to get out.
 534  */
 535 #ifdef CONFIG_PPC_970_NAP
 536 #define FINISH_NAP                              \
 537 BEGIN_FTR_SECTION                               \
 538         CURRENT_THREAD_INFO(r11, r1);           \
 539         ld      r9,TI_LOCAL_FLAGS(r11);         \
 540         andi.   r10,r9,_TLF_NAPPING;            \
 541         bnel    power4_fixup_nap;               \
 542 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
 543 #else
 544 #define FINISH_NAP
 545 #endif
 546
 547 #endif  /* _ASM_POWERPC_EXCEPTION_H */