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 #define STF_ENTRY_BARRIER_SLOT                                          \
  55         STF_ENTRY_BARRIER_FIXUP_SECTION;                                \
  56         nop;                                                            \
  57         nop;                                                            \
  58         nop
  59
  60 #define STF_EXIT_BARRIER_SLOT                                           \
  61         STF_EXIT_BARRIER_FIXUP_SECTION;                                 \
  62         nop;                                                            \
  63         nop;                                                            \
  64         nop;                                                            \
  65         nop;                                                            \
  66         nop;                                                            \
  67         nop
  68
  69 #define ENTRY_FLUSH_SLOT                                                \
  70         ENTRY_FLUSH_FIXUP_SECTION;                                      \
  71         nop;                                                            \
  72         nop;                                                            \
  73         nop;
  74
  75 /*
  76  * r10 must be free to use, r13 must be paca
  77  */
  78 #define INTERRUPT_TO_KERNEL                                             \
  79         STF_ENTRY_BARRIER_SLOT;                                         \
  80         ENTRY_FLUSH_SLOT
  81
  82 /*
  83  * Macros for annotating the expected destination of (h)rfid
  84  *
  85  * The nop instructions allow us to insert one or more instructions to flush the
  86  * L1-D cache when returning to userspace or a guest.
  87  */
  88 #define RFI_FLUSH_SLOT                                                  \
  89         RFI_FLUSH_FIXUP_SECTION;                                        \
  90         nop;                                                            \
  91         nop;                                                            \
  92         nop
  93
  94 #define RFI_TO_KERNEL                                                   \
  95         rfid
  96
  97 #define RFI_TO_USER                                                     \
  98         STF_EXIT_BARRIER_SLOT;                                          \
  99         RFI_FLUSH_SLOT;                                                 \
 100         rfid;                                                           \
 101         b       rfi_flush_fallback
 102
 103 #define RFI_TO_USER_OR_KERNEL                                           \
 104         STF_EXIT_BARRIER_SLOT;                                          \
 105         RFI_FLUSH_SLOT;                                                 \
 106         rfid;                                                           \
 107         b       rfi_flush_fallback
 108
 109 #define RFI_TO_GUEST                                                    \
 110         STF_EXIT_BARRIER_SLOT;                                          \
 111         RFI_FLUSH_SLOT;                                                 \
 112         rfid;                                                           \
 113         b       rfi_flush_fallback
 114
 115 #define HRFI_TO_KERNEL                                                  \
 116         hrfid
 117
 118 #define HRFI_TO_USER                                                    \
 119         STF_EXIT_BARRIER_SLOT;                                          \
 120         RFI_FLUSH_SLOT;                                                 \
 121         hrfid;                                                          \
 122         b       hrfi_flush_fallback
 123
 124 #define HRFI_TO_USER_OR_KERNEL                                          \
 125         STF_EXIT_BARRIER_SLOT;                                          \
 126         RFI_FLUSH_SLOT;                                                 \
 127         hrfid;                                                          \
 128         b       hrfi_flush_fallback
 129
 130 #define HRFI_TO_GUEST                                                   \
 131         STF_EXIT_BARRIER_SLOT;                                          \
 132         RFI_FLUSH_SLOT;                                                 \
 133         hrfid;                                                          \
 134         b       hrfi_flush_fallback
 135
 136 #define HRFI_TO_UNKNOWN                                                 \
 137         STF_EXIT_BARRIER_SLOT;                                          \
 138         RFI_FLUSH_SLOT;                                                 \
 139         hrfid;                                                          \
 140         b       hrfi_flush_fallback
 141
 142 #ifdef CONFIG_RELOCATABLE
 143 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)                    \
 144         mfspr   r11,SPRN_##h##SRR0;     /* save SRR0 */                 \
 145         LOAD_HANDLER(r12,label);                                        \
 146         mtctr   r12;                                                    \
 147         mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
 148         li      r10,MSR_RI;                                             \
 149         mtmsrd  r10,1;                  /* Set RI (EE=0) */             \
 150         bctr;
 151 #else
 152 /* If not relocatable, we can jump directly -- and save messing with LR */
 153 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)                    \
 154         mfspr   r11,SPRN_##h##SRR0;     /* save SRR0 */                 \
 155         mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
 156         li      r10,MSR_RI;                                             \
 157         mtmsrd  r10,1;                  /* Set RI (EE=0) */             \
 158         b       label;
 159 #endif
 160 #define EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)                      \
 161         __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)                    \
 162
 163 /*
 164  * As EXCEPTION_PROLOG_PSERIES(), except we've already got relocation on
 165  * so no need to rfid.  Save lr in case we're CONFIG_RELOCATABLE, in which
 166  * case EXCEPTION_RELON_PROLOG_PSERIES_1 will be using lr.
 167  */
 168 #define EXCEPTION_RELON_PROLOG_PSERIES(area, label, h, extra, vec)      \
 169         EXCEPTION_PROLOG_0(area);                                       \
 170         EXCEPTION_PROLOG_1(area, extra, vec);                           \
 171         EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)
 172
 173 /*
 174  * We're short on space and time in the exception prolog, so we can't
 175  * use the normal LOAD_REG_IMMEDIATE macro to load the address of label.
 176  * Instead we get the base of the kernel from paca->kernelbase and or in the low
 177  * part of label. This requires that the label be within 64KB of kernelbase, and
 178  * that kernelbase be 64K aligned.
 179  */
 180 #define LOAD_HANDLER(reg, label)                                        \
 181         ld      reg,PACAKBASE(r13);     /* get high part of &label */   \
 182         ori     reg,reg,FIXED_SYMBOL_ABS_ADDR(label);
 183
 184 #define __LOAD_HANDLER(reg, label)                                      \
 185         ld      reg,PACAKBASE(r13);                                     \
 186         ori     reg,reg,(ABS_ADDR(label))@l;
 187
 188 /* Exception register prefixes */
 189 #define EXC_HV  H
 190 #define EXC_STD
 191
 192 #if defined(CONFIG_RELOCATABLE)
 193 /*
 194  * If we support interrupts with relocation on AND we're a relocatable kernel,
 195  * we need to use CTR to get to the 2nd level handler.  So, save/restore it
 196  * when required.
 197  */
 198 #define SAVE_CTR(reg, area)     mfctr   reg ;   std     reg,area+EX_CTR(r13)
 199 #define GET_CTR(reg, area)                      ld      reg,area+EX_CTR(r13)
 200 #define RESTORE_CTR(reg, area)  ld      reg,area+EX_CTR(r13) ; mtctr reg
 201 #else
 202 /* ...else CTR is unused and in register. */
 203 #define SAVE_CTR(reg, area)
 204 #define GET_CTR(reg, area)      mfctr   reg
 205 #define RESTORE_CTR(reg, area)
 206 #endif
 207
 208 /*
 209  * PPR save/restore macros used in exceptions_64s.S
 210  * Used for P7 or later processors
 211  */
 212 #define SAVE_PPR(area, ra, rb)                                          \
 213 BEGIN_FTR_SECTION_NESTED(940)                                           \
 214         ld      ra,PACACURRENT(r13);                                    \
 215         ld      rb,area+EX_PPR(r13);    /* Read PPR from paca */        \
 216         std     rb,TASKTHREADPPR(ra);                                   \
 217 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
 218
 219 #define RESTORE_PPR_PACA(area, ra)                                      \
 220 BEGIN_FTR_SECTION_NESTED(941)                                           \
 221         ld      ra,area+EX_PPR(r13);                                    \
 222         mtspr   SPRN_PPR,ra;                                            \
 223 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
 224
 225 /*
 226  * Get an SPR into a register if the CPU has the given feature
 227  */
 228 #define OPT_GET_SPR(ra, spr, ftr)                                       \
 229 BEGIN_FTR_SECTION_NESTED(943)                                           \
 230         mfspr   ra,spr;                                                 \
 231 END_FTR_SECTION_NESTED(ftr,ftr,943)
 232
 233 /*
 234  * Set an SPR from a register if the CPU has the given feature
 235  */
 236 #define OPT_SET_SPR(ra, spr, ftr)                                       \
 237 BEGIN_FTR_SECTION_NESTED(943)                                           \
 238         mtspr   spr,ra;                                                 \
 239 END_FTR_SECTION_NESTED(ftr,ftr,943)
 240
 241 /*
 242  * Save a register to the PACA if the CPU has the given feature
 243  */
 244 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr)                           \
 245 BEGIN_FTR_SECTION_NESTED(943)                                           \
 246         std     ra,offset(r13);                                         \
 247 END_FTR_SECTION_NESTED(ftr,ftr,943)
 248
 249 #define EXCEPTION_PROLOG_0_PACA(area)                                   \
 250         std     r9,area+EX_R9(r13);     /* save r9 */                   \
 251         OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR);                     \
 252         HMT_MEDIUM;                                                     \
 253         std     r10,area+EX_R10(r13);   /* save r10 - r12 */            \
 254         OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR)
 255
 256 #define EXCEPTION_PROLOG_0(area)                                        \
 257         GET_PACA(r13);                                                  \
 258         EXCEPTION_PROLOG_0_PACA(area)
 259
 260 #define __EXCEPTION_PROLOG_1(area, extra, vec)                          \
 261         OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR);         \
 262         OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR);          \
 263         INTERRUPT_TO_KERNEL;                                            \
 264         SAVE_CTR(r10, area);                                            \
 265         mfcr    r9;                                                     \
 266         extra(vec);                                                     \
 267         std     r11,area+EX_R11(r13);                                   \
 268         std     r12,area+EX_R12(r13);                                   \
 269         GET_SCRATCH0(r10);                                              \
 270         std     r10,area+EX_R13(r13)
 271 #define EXCEPTION_PROLOG_1(area, extra, vec)                            \
 272         __EXCEPTION_PROLOG_1(area, extra, vec)
 273
 274 #define __EXCEPTION_PROLOG_PSERIES_1(label, h)                          \
 275         ld      r10,PACAKMSR(r13);      /* get MSR value for kernel */  \
 276         mfspr   r11,SPRN_##h##SRR0;     /* save SRR0 */                 \
 277         LOAD_HANDLER(r12,label)                                         \
 278         mtspr   SPRN_##h##SRR0,r12;                                     \
 279         mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
 280         mtspr   SPRN_##h##SRR1,r10;                                     \
 281         h##RFI_TO_KERNEL;                                               \
 282         b       .       /* prevent speculative execution */
 283 #define EXCEPTION_PROLOG_PSERIES_1(label, h)                            \
 284         __EXCEPTION_PROLOG_PSERIES_1(label, h)
 285
 286 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec)            \
 287         EXCEPTION_PROLOG_0(area);                                       \
 288         EXCEPTION_PROLOG_1(area, extra, vec);                           \
 289         EXCEPTION_PROLOG_PSERIES_1(label, h);
 290
 291 /* Have the PACA in r13 already */
 292 #define EXCEPTION_PROLOG_PSERIES_PACA(area, label, h, extra, vec)       \
 293         EXCEPTION_PROLOG_0_PACA(area);                                  \
 294         EXCEPTION_PROLOG_1(area, extra, vec);                           \
 295         EXCEPTION_PROLOG_PSERIES_1(label, h);
 296
 297 #define __KVMTEST(h, n)                                                 \
 298         lbz     r10,HSTATE_IN_GUEST(r13);                               \
 299         cmpwi   r10,0;                                                  \
 300         bne     do_kvm_##h##n
 301
 302 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 303 /*
 304  * If hv is possible, interrupts come into to the hv version
 305  * of the kvmppc_interrupt code, which then jumps to the PR handler,
 306  * kvmppc_interrupt_pr, if the guest is a PR guest.
 307  */
 308 #define kvmppc_interrupt kvmppc_interrupt_hv
 309 #else
 310 #define kvmppc_interrupt kvmppc_interrupt_pr
 311 #endif
 312
 313 #ifdef CONFIG_RELOCATABLE
 314 #define BRANCH_TO_COMMON(reg, label)                                    \
 315         __LOAD_HANDLER(reg, label);                                     \
 316         mtctr   reg;                                                    \
 317         bctr
 318
 319 #else
 320 #define BRANCH_TO_COMMON(reg, label)                                    \
 321         b       label
 322
 323 #endif
 324
 325 #define __KVM_HANDLER_PROLOG(area, n)                                   \
 326         BEGIN_FTR_SECTION_NESTED(947)                                   \
 327         ld      r10,area+EX_CFAR(r13);                                  \
 328         std     r10,HSTATE_CFAR(r13);                                   \
 329         END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947);          \
 330         BEGIN_FTR_SECTION_NESTED(948)                                   \
 331         ld      r10,area+EX_PPR(r13);                                   \
 332         std     r10,HSTATE_PPR(r13);                                    \
 333         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 334         ld      r10,area+EX_R10(r13);                                   \
 335         stw     r9,HSTATE_SCRATCH1(r13);                                \
 336         ld      r9,area+EX_R9(r13);                                     \
 337         std     r12,HSTATE_SCRATCH0(r13);                               \
 338
 339 #define __KVM_HANDLER(area, h, n)                                       \
 340         __KVM_HANDLER_PROLOG(area, n)                                   \
 341         li      r12,n;                                                  \
 342         b       kvmppc_interrupt
 343
 344 #define __KVM_HANDLER_SKIP(area, h, n)                                  \
 345         cmpwi   r10,KVM_GUEST_MODE_SKIP;                                \
 346         ld      r10,area+EX_R10(r13);                                   \
 347         beq     89f;                                                    \
 348         stw     r9,HSTATE_SCRATCH1(r13);                                \
 349         BEGIN_FTR_SECTION_NESTED(948)                                   \
 350         ld      r9,area+EX_PPR(r13);                                    \
 351         std     r9,HSTATE_PPR(r13);                                     \
 352         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 353         ld      r9,area+EX_R9(r13);                                     \
 354         std     r12,HSTATE_SCRATCH0(r13);                               \
 355         li      r12,n;                                                  \
 356         b       kvmppc_interrupt;                                       \
 357 89:     mtocrf  0x80,r9;                                                \
 358         ld      r9,area+EX_R9(r13);                                     \
 359         b       kvmppc_skip_##h##interrupt
 360
 361 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 362 #define KVMTEST(h, n)                   __KVMTEST(h, n)
 363 #define KVM_HANDLER(area, h, n)         __KVM_HANDLER(area, h, n)
 364 #define KVM_HANDLER_SKIP(area, h, n)    __KVM_HANDLER_SKIP(area, h, n)
 365
 366 #else
 367 #define KVMTEST(h, n)
 368 #define KVM_HANDLER(area, h, n)
 369 #define KVM_HANDLER_SKIP(area, h, n)
 370 #endif
 371
 372 #define NOTEST(n)
 373
 374 /*
 375  * The common exception prolog is used for all except a few exceptions
 376  * such as a segment miss on a kernel address.  We have to be prepared
 377  * to take another exception from the point where we first touch the
 378  * kernel stack onwards.
 379  *
 380  * On entry r13 points to the paca, r9-r13 are saved in the paca,
 381  * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
 382  * SRR1, and relocation is on.
 383  */
 384 #define EXCEPTION_PROLOG_COMMON(n, area)                                   \
 385         andi.   r10,r12,MSR_PR;         /* See if coming from user      */ \
 386         mr      r10,r1;                 /* Save r1                      */ \
 387         subi    r1,r1,INT_FRAME_SIZE;   /* alloc frame on kernel stack  */ \
 388         beq-    1f;                                                        \
 389         ld      r1,PACAKSAVE(r13);      /* kernel stack to use          */ \
 390 1:      cmpdi   cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace  */ \
 391         blt+    cr1,3f;                 /* abort if it is               */ \
 392         li      r1,(n);                 /* will be reloaded later       */ \
 393         sth     r1,PACA_TRAP_SAVE(r13);                                    \
 394         std     r3,area+EX_R3(r13);                                        \
 395         addi    r3,r13,area;            /* r3 -> where regs are saved*/    \
 396         RESTORE_CTR(r1, area);                                             \
 397         b       bad_stack;                                                 \
 398 3:      std     r9,_CCR(r1);            /* save CR in stackframe        */ \
 399         std     r11,_NIP(r1);           /* save SRR0 in stackframe      */ \
 400         std     r12,_MSR(r1);           /* save SRR1 in stackframe      */ \
 401         std     r10,0(r1);              /* make stack chain pointer     */ \
 402         std     r0,GPR0(r1);            /* save r0 in stackframe        */ \
 403         std     r10,GPR1(r1);           /* save r1 in stackframe        */ \
 404         beq     4f;                     /* if from kernel mode          */ \
 405         ACCOUNT_CPU_USER_ENTRY(r13, r9, r10);                              \
 406         SAVE_PPR(area, r9, r10);                                           \
 407 4:      EXCEPTION_PROLOG_COMMON_2(area)                                    \
 408         EXCEPTION_PROLOG_COMMON_3(n)                                       \
 409         ACCOUNT_STOLEN_TIME
 410
 411 /* Save original regs values from save area to stack frame. */
 412 #define EXCEPTION_PROLOG_COMMON_2(area)                                    \
 413         ld      r9,area+EX_R9(r13);     /* move r9, r10 to stackframe   */ \
 414         ld      r10,area+EX_R10(r13);                                      \
 415         std     r9,GPR9(r1);                                               \
 416         std     r10,GPR10(r1);                                             \
 417         ld      r9,area+EX_R11(r13);    /* move r11 - r13 to stackframe */ \
 418         ld      r10,area+EX_R12(r13);                                      \
 419         ld      r11,area+EX_R13(r13);                                      \
 420         std     r9,GPR11(r1);                                              \
 421         std     r10,GPR12(r1);                                             \
 422         std     r11,GPR13(r1);                                             \
 423         BEGIN_FTR_SECTION_NESTED(66);                                      \
 424         ld      r10,area+EX_CFAR(r13);                                     \
 425         std     r10,ORIG_GPR3(r1);                                         \
 426         END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66);            \
 427         GET_CTR(r10, area);                                                \
 428         std     r10,_CTR(r1);
 429
 430 #define EXCEPTION_PROLOG_COMMON_3(n)                                       \
 431         std     r2,GPR2(r1);            /* save r2 in stackframe        */ \
 432         SAVE_4GPRS(3, r1);              /* save r3 - r6 in stackframe   */ \
 433         SAVE_2GPRS(7, r1);              /* save r7, r8 in stackframe    */ \
 434         mflr    r9;                     /* Get LR, later save to stack  */ \
 435         ld      r2,PACATOC(r13);        /* get kernel TOC into r2       */ \
 436         std     r9,_LINK(r1);                                              \
 437         lbz     r10,PACASOFTIRQEN(r13);                            \
 438         mfspr   r11,SPRN_XER;           /* save XER in stackframe       */ \
 439         std     r10,SOFTE(r1);                                             \
 440         std     r11,_XER(r1);                                              \
 441         li      r9,(n)+1;                                                  \
 442         std     r9,_TRAP(r1);           /* set trap number              */ \
 443         li      r10,0;                                                     \
 444         ld      r11,exception_marker@toc(r2);                              \
 445         std     r10,RESULT(r1);         /* clear regs->result           */ \
 446         std     r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame      */
 447
 448 /*
 449  * Exception vectors.
 450  */
 451 #define STD_EXCEPTION_PSERIES(vec, label)                       \
 452         SET_SCRATCH0(r13);              /* save r13 */          \
 453         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label,             \
 454                                  EXC_STD, KVMTEST_PR, vec);     \
 455
 456 /* Version of above for when we have to branch out-of-line */
 457 #define __OOL_EXCEPTION(vec, label, hdlr)                       \
 458         SET_SCRATCH0(r13)                                       \
 459         EXCEPTION_PROLOG_0(PACA_EXGEN)                          \
 460         b hdlr;
 461
 462 #define STD_EXCEPTION_PSERIES_OOL(vec, label)                   \
 463         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec);        \
 464         EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 465
 466 #define STD_EXCEPTION_HV(loc, vec, label)                       \
 467         SET_SCRATCH0(r13);      /* save r13 */                  \
 468         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label,             \
 469                                  EXC_HV, KVMTEST_HV, vec);
 470
 471 #define STD_EXCEPTION_HV_OOL(vec, label)                        \
 472         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec);        \
 473         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 474
 475 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label)    \
 476         /* No guest interrupts come through here */     \
 477         SET_SCRATCH0(r13);              /* save r13 */  \
 478         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec);
 479
 480 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label)             \
 481         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 482         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD)
 483
 484 #define STD_RELON_EXCEPTION_HV(loc, vec, label)         \
 485         /* No guest interrupts come through here */     \
 486         SET_SCRATCH0(r13);      /* save r13 */          \
 487         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_HV, NOTEST, vec);
 488
 489 #define STD_RELON_EXCEPTION_HV_OOL(vec, label)                  \
 490         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 491         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV)
 492
 493 /* This associate vector numbers with bits in paca->irq_happened */
 494 #define SOFTEN_VALUE_0x500      PACA_IRQ_EE
 495 #define SOFTEN_VALUE_0x900      PACA_IRQ_DEC
 496 #define SOFTEN_VALUE_0x980      PACA_IRQ_DEC
 497 #define SOFTEN_VALUE_0xa00      PACA_IRQ_DBELL
 498 #define SOFTEN_VALUE_0xe80      PACA_IRQ_DBELL
 499 #define SOFTEN_VALUE_0xe60      PACA_IRQ_HMI
 500 #define SOFTEN_VALUE_0xea0      PACA_IRQ_EE
 501
 502 #define __SOFTEN_TEST(h, vec)                                           \
 503         lbz     r10,PACASOFTIRQEN(r13);                                 \
 504         cmpwi   r10,0;                                                  \
 505         li      r10,SOFTEN_VALUE_##vec;                                 \
 506         beq     masked_##h##interrupt
 507
 508 #define _SOFTEN_TEST(h, vec)    __SOFTEN_TEST(h, vec)
 509
 510 #define SOFTEN_TEST_PR(vec)                                             \
 511         KVMTEST(EXC_STD, vec);                                          \
 512         _SOFTEN_TEST(EXC_STD, vec)
 513
 514 #define SOFTEN_TEST_HV(vec)                                             \
 515         KVMTEST(EXC_HV, vec);                                           \
 516         _SOFTEN_TEST(EXC_HV, vec)
 517
 518 #define KVMTEST_PR(vec)                                                 \
 519         KVMTEST(EXC_STD, vec)
 520
 521 #define KVMTEST_HV(vec)                                                 \
 522         KVMTEST(EXC_HV, vec)
 523
 524 #define SOFTEN_NOTEST_PR(vec)           _SOFTEN_TEST(EXC_STD, vec)
 525 #define SOFTEN_NOTEST_HV(vec)           _SOFTEN_TEST(EXC_HV, vec)
 526
 527 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)              \
 528         SET_SCRATCH0(r13);    /* save r13 */                            \
 529         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 530         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 531         EXCEPTION_PROLOG_PSERIES_1(label, h);
 532
 533 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)               \
 534         __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
 535
 536 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label)                     \
 537         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 538                                     EXC_STD, SOFTEN_TEST_PR)
 539
 540 #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label)                      \
 541         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec);            \
 542         EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 543
 544 #define MASKABLE_EXCEPTION_HV(loc, vec, label)                          \
 545         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 546                                     EXC_HV, SOFTEN_TEST_HV)
 547
 548 #define MASKABLE_EXCEPTION_HV_OOL(vec, label)                           \
 549         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec);            \
 550         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 551
 552 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)        \
 553         SET_SCRATCH0(r13);    /* save r13 */                            \
 554         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 555         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 556         EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)
 557
 558 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)         \
 559         __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)
 560
 561 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label)               \
 562         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 563                                           EXC_STD, SOFTEN_NOTEST_PR)
 564
 565 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label)                    \
 566         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 567                                           EXC_HV, SOFTEN_NOTEST_HV)
 568
 569 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label)                     \
 570         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec);          \
 571         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 572
 573 #define MASKABLE_RELON_EXCEPTION_PSERIES_OOL(vec, label)               \
 574        EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_PR, vec);          \
 575        EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 576
 577 /*
 578  * Our exception common code can be passed various "additions"
 579  * to specify the behaviour of interrupts, whether to kick the
 580  * runlatch, etc...
 581  */
 582
 583 /*
 584  * This addition reconciles our actual IRQ state with the various software
 585  * flags that track it. This may call C code.
 586  */
 587 #define ADD_RECONCILE   RECONCILE_IRQ_STATE(r10,r11)
 588
 589 #define ADD_NVGPRS                              \
 590         bl      save_nvgprs
 591
 592 #define RUNLATCH_ON                             \
 593 BEGIN_FTR_SECTION                               \
 594         CURRENT_THREAD_INFO(r3, r1);            \
 595         ld      r4,TI_LOCAL_FLAGS(r3);          \
 596         andi.   r0,r4,_TLF_RUNLATCH;            \
 597         beql    ppc64_runlatch_on_trampoline;   \
 598 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
 599
 600 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions)     \
 601         EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN);              \
 602         /* Volatile regs are potentially clobbered here */      \
 603         additions;                                              \
 604         addi    r3,r1,STACK_FRAME_OVERHEAD;                     \
 605         bl      hdlr;                                           \
 606         b       ret
 607
 608 #define STD_EXCEPTION_COMMON(trap, label, hdlr)                 \
 609         EXCEPTION_COMMON(trap, label, hdlr, ret_from_except,    \
 610                          ADD_NVGPRS;ADD_RECONCILE)
 611
 612 /*
 613  * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
 614  * in the idle task and therefore need the special idle handling
 615  * (finish nap and runlatch)
 616  */
 617 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr)             \
 618         EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
 619                          FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
 620
 621 /*
 622  * When the idle code in power4_idle puts the CPU into NAP mode,
 623  * it has to do so in a loop, and relies on the external interrupt
 624  * and decrementer interrupt entry code to get it out of the loop.
 625  * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
 626  * to signal that it is in the loop and needs help to get out.
 627  */
 628 #ifdef CONFIG_PPC_970_NAP
 629 #define FINISH_NAP                              \
 630 BEGIN_FTR_SECTION                               \
 631         CURRENT_THREAD_INFO(r11, r1);           \
 632         ld      r9,TI_LOCAL_FLAGS(r11);         \
 633         andi.   r10,r9,_TLF_NAPPING;            \
 634         bnel    power4_fixup_nap;               \
 635 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
 636 #else
 637 #define FINISH_NAP
 638 #endif
 639
 640 #endif  /* _ASM_POWERPC_EXCEPTION_H */