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
  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 #define STF_ENTRY_BARRIER_SLOT                                          \
  54         STF_ENTRY_BARRIER_FIXUP_SECTION;                                \
  55         nop;                                                            \
  56         nop;                                                            \
  57         nop
  58
  59 #define STF_EXIT_BARRIER_SLOT                                           \
  60         STF_EXIT_BARRIER_FIXUP_SECTION;                                 \
  61         nop;                                                            \
  62         nop;                                                            \
  63         nop;                                                            \
  64         nop;                                                            \
  65         nop;                                                            \
  66         nop
  67
  68 #define ENTRY_FLUSH_SLOT                                                \
  69         ENTRY_FLUSH_FIXUP_SECTION;                                      \
  70         nop;                                                            \
  71         nop;                                                            \
  72         nop;
  73
  74 /*
  75  * r10 must be free to use, r13 must be paca
  76  */
  77 #define INTERRUPT_TO_KERNEL                                             \
  78         STF_ENTRY_BARRIER_SLOT;                                         \
  79         ENTRY_FLUSH_SLOT
  80
  81 /*
  82  * Macros for annotating the expected destination of (h)rfid
  83  *
  84  * The nop instructions allow us to insert one or more instructions to flush the
  85  * L1-D cache when returning to userspace or a guest.
  86  */
  87 #define RFI_FLUSH_SLOT                                                  \
  88         RFI_FLUSH_FIXUP_SECTION;                                        \
  89         nop;                                                            \
  90         nop;                                                            \
  91         nop
  92
  93 #define RFI_TO_KERNEL                                                   \
  94         rfid
  95
  96 #define RFI_TO_USER                                                     \
  97         STF_EXIT_BARRIER_SLOT;                                          \
  98         RFI_FLUSH_SLOT;                                                 \
  99         rfid;                                                           \
 100         b       rfi_flush_fallback
 101
 102 #define RFI_TO_USER_OR_KERNEL                                           \
 103         STF_EXIT_BARRIER_SLOT;                                          \
 104         RFI_FLUSH_SLOT;                                                 \
 105         rfid;                                                           \
 106         b       rfi_flush_fallback
 107
 108 #define RFI_TO_GUEST                                                    \
 109         STF_EXIT_BARRIER_SLOT;                                          \
 110         RFI_FLUSH_SLOT;                                                 \
 111         rfid;                                                           \
 112         b       rfi_flush_fallback
 113
 114 #define HRFI_TO_KERNEL                                                  \
 115         hrfid
 116
 117 #define HRFI_TO_USER                                                    \
 118         STF_EXIT_BARRIER_SLOT;                                          \
 119         RFI_FLUSH_SLOT;                                                 \
 120         hrfid;                                                          \
 121         b       hrfi_flush_fallback
 122
 123 #define HRFI_TO_USER_OR_KERNEL                                          \
 124         STF_EXIT_BARRIER_SLOT;                                          \
 125         RFI_FLUSH_SLOT;                                                 \
 126         hrfid;                                                          \
 127         b       hrfi_flush_fallback
 128
 129 #define HRFI_TO_GUEST                                                   \
 130         STF_EXIT_BARRIER_SLOT;                                          \
 131         RFI_FLUSH_SLOT;                                                 \
 132         hrfid;                                                          \
 133         b       hrfi_flush_fallback
 134
 135 #define HRFI_TO_UNKNOWN                                                 \
 136         STF_EXIT_BARRIER_SLOT;                                          \
 137         RFI_FLUSH_SLOT;                                                 \
 138         hrfid;                                                          \
 139         b       hrfi_flush_fallback
 140
 141 #ifdef CONFIG_RELOCATABLE
 142 #define __EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)                    \
 143         ld      r12,PACAKBASE(r13);     /* get high part of &label */   \
 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 SET_REG_IMMEDIATE macro. Normally we just need the
 176  * low halfword of the address, but for Kdump we need the whole low
 177  * word.
 178  */
 179 #define LOAD_HANDLER(reg, label)                                        \
 180         /* Handlers must be within 64K of kbase, which must be 64k aligned */ \
 181         ori     reg,reg,(label)-_stext; /* virt addr of handler ... */
 182
 183 /* Exception register prefixes */
 184 #define EXC_HV  H
 185 #define EXC_STD
 186
 187 #if defined(CONFIG_RELOCATABLE)
 188 /*
 189  * If we support interrupts with relocation on AND we're a relocatable kernel,
 190  * we need to use CTR to get to the 2nd level handler.  So, save/restore it
 191  * when required.
 192  */
 193 #define SAVE_CTR(reg, area)     mfctr   reg ;   std     reg,area+EX_CTR(r13)
 194 #define GET_CTR(reg, area)                      ld      reg,area+EX_CTR(r13)
 195 #define RESTORE_CTR(reg, area)  ld      reg,area+EX_CTR(r13) ; mtctr reg
 196 #else
 197 /* ...else CTR is unused and in register. */
 198 #define SAVE_CTR(reg, area)
 199 #define GET_CTR(reg, area)      mfctr   reg
 200 #define RESTORE_CTR(reg, area)
 201 #endif
 202
 203 /*
 204  * PPR save/restore macros used in exceptions_64s.S
 205  * Used for P7 or later processors
 206  */
 207 #define SAVE_PPR(area, ra, rb)                                          \
 208 BEGIN_FTR_SECTION_NESTED(940)                                           \
 209         ld      ra,PACACURRENT(r13);                                    \
 210         ld      rb,area+EX_PPR(r13);    /* Read PPR from paca */        \
 211         std     rb,TASKTHREADPPR(ra);                                   \
 212 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
 213
 214 #define RESTORE_PPR_PACA(area, ra)                                      \
 215 BEGIN_FTR_SECTION_NESTED(941)                                           \
 216         ld      ra,area+EX_PPR(r13);                                    \
 217         mtspr   SPRN_PPR,ra;                                            \
 218 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
 219
 220 /*
 221  * Increase the priority on systems where PPR save/restore is not
 222  * implemented/ supported.
 223  */
 224 #define HMT_MEDIUM_PPR_DISCARD                                          \
 225 BEGIN_FTR_SECTION_NESTED(942)                                           \
 226         HMT_MEDIUM;                                                     \
 227 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,942)  /*non P7*/
 228
 229 /*
 230  * Get an SPR into a register if the CPU has the given feature
 231  */
 232 #define OPT_GET_SPR(ra, spr, ftr)                                       \
 233 BEGIN_FTR_SECTION_NESTED(943)                                           \
 234         mfspr   ra,spr;                                                 \
 235 END_FTR_SECTION_NESTED(ftr,ftr,943)
 236
 237 /*
 238  * Set an SPR from a register if the CPU has the given feature
 239  */
 240 #define OPT_SET_SPR(ra, spr, ftr)                                       \
 241 BEGIN_FTR_SECTION_NESTED(943)                                           \
 242         mtspr   spr,ra;                                                 \
 243 END_FTR_SECTION_NESTED(ftr,ftr,943)
 244
 245 /*
 246  * Save a register to the PACA if the CPU has the given feature
 247  */
 248 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr)                           \
 249 BEGIN_FTR_SECTION_NESTED(943)                                           \
 250         std     ra,offset(r13);                                         \
 251 END_FTR_SECTION_NESTED(ftr,ftr,943)
 252
 253 #define EXCEPTION_PROLOG_0(area)                                        \
 254         GET_PACA(r13);                                                  \
 255         std     r9,area+EX_R9(r13);     /* save r9 */                   \
 256         OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR);                     \
 257         HMT_MEDIUM;                                                     \
 258         std     r10,area+EX_R10(r13);   /* save r10 - r12 */            \
 259         OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR)
 260
 261 #define __EXCEPTION_PROLOG_1(area, extra, vec)                          \
 262         OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR);         \
 263         OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR);          \
 264         INTERRUPT_TO_KERNEL;                                            \
 265         SAVE_CTR(r10, area);                                            \
 266         mfcr    r9;                                                     \
 267         extra(vec);                                                     \
 268         std     r11,area+EX_R11(r13);                                   \
 269         std     r12,area+EX_R12(r13);                                   \
 270         GET_SCRATCH0(r10);                                              \
 271         std     r10,area+EX_R13(r13)
 272 #define EXCEPTION_PROLOG_1(area, extra, vec)                            \
 273         __EXCEPTION_PROLOG_1(area, extra, vec)
 274
 275 #define __EXCEPTION_PROLOG_PSERIES_1(label, h)                          \
 276         ld      r12,PACAKBASE(r13);     /* get high part of &label */   \
 277         ld      r10,PACAKMSR(r13);      /* get MSR value for kernel */  \
 278         mfspr   r11,SPRN_##h##SRR0;     /* save SRR0 */                 \
 279         LOAD_HANDLER(r12,label)                                         \
 280         mtspr   SPRN_##h##SRR0,r12;                                     \
 281         mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
 282         mtspr   SPRN_##h##SRR1,r10;                                     \
 283         h##RFI_TO_KERNEL;                                               \
 284         b       .       /* prevent speculative execution */
 285 #define EXCEPTION_PROLOG_PSERIES_1(label, h)                            \
 286         __EXCEPTION_PROLOG_PSERIES_1(label, h)
 287
 288 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec)            \
 289         EXCEPTION_PROLOG_0(area);                                       \
 290         EXCEPTION_PROLOG_1(area, extra, vec);                           \
 291         EXCEPTION_PROLOG_PSERIES_1(label, h);
 292
 293 #define __KVMTEST(n)                                                    \
 294         lbz     r10,HSTATE_IN_GUEST(r13);                       \
 295         cmpwi   r10,0;                                                  \
 296         bne     do_kvm_##n
 297
 298 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 299 /*
 300  * If hv is possible, interrupts come into to the hv version
 301  * of the kvmppc_interrupt code, which then jumps to the PR handler,
 302  * kvmppc_interrupt_pr, if the guest is a PR guest.
 303  */
 304 #define kvmppc_interrupt kvmppc_interrupt_hv
 305 #else
 306 #define kvmppc_interrupt kvmppc_interrupt_pr
 307 #endif
 308
 309 #define __KVM_HANDLER(area, h, n)                                       \
 310 do_kvm_##n:                                                             \
 311         BEGIN_FTR_SECTION_NESTED(947)                                   \
 312         ld      r10,area+EX_CFAR(r13);                                  \
 313         std     r10,HSTATE_CFAR(r13);                                   \
 314         END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947);          \
 315         BEGIN_FTR_SECTION_NESTED(948)                                   \
 316         ld      r10,area+EX_PPR(r13);                                   \
 317         std     r10,HSTATE_PPR(r13);                                    \
 318         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 319         ld      r10,area+EX_R10(r13);                                   \
 320         stw     r9,HSTATE_SCRATCH1(r13);                                \
 321         ld      r9,area+EX_R9(r13);                                     \
 322         std     r12,HSTATE_SCRATCH0(r13);                               \
 323         li      r12,n;                                                  \
 324         b       kvmppc_interrupt
 325
 326 #define __KVM_HANDLER_SKIP(area, h, n)                                  \
 327 do_kvm_##n:                                                             \
 328         cmpwi   r10,KVM_GUEST_MODE_SKIP;                                \
 329         ld      r10,area+EX_R10(r13);                                   \
 330         beq     89f;                                                    \
 331         stw     r9,HSTATE_SCRATCH1(r13);                        \
 332         BEGIN_FTR_SECTION_NESTED(948)                                   \
 333         ld      r9,area+EX_PPR(r13);                                    \
 334         std     r9,HSTATE_PPR(r13);                                     \
 335         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 336         ld      r9,area+EX_R9(r13);                                     \
 337         std     r12,HSTATE_SCRATCH0(r13);                       \
 338         li      r12,n;                                                  \
 339         b       kvmppc_interrupt;                                       \
 340 89:     mtocrf  0x80,r9;                                                \
 341         ld      r9,area+EX_R9(r13);                                     \
 342         b       kvmppc_skip_##h##interrupt
 343
 344 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 345 #define KVMTEST(n)                      __KVMTEST(n)
 346 #define KVM_HANDLER(area, h, n)         __KVM_HANDLER(area, h, n)
 347 #define KVM_HANDLER_SKIP(area, h, n)    __KVM_HANDLER_SKIP(area, h, n)
 348
 349 #else
 350 #define KVMTEST(n)
 351 #define KVM_HANDLER(area, h, n)
 352 #define KVM_HANDLER_SKIP(area, h, n)
 353 #endif
 354
 355 #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
 356 #define KVMTEST_PR(n)                   __KVMTEST(n)
 357 #define KVM_HANDLER_PR(area, h, n)      __KVM_HANDLER(area, h, n)
 358 #define KVM_HANDLER_PR_SKIP(area, h, n) __KVM_HANDLER_SKIP(area, h, n)
 359
 360 #else
 361 #define KVMTEST_PR(n)
 362 #define KVM_HANDLER_PR(area, h, n)
 363 #define KVM_HANDLER_PR_SKIP(area, h, n)
 364 #endif
 365
 366 #define NOTEST(n)
 367
 368 /*
 369  * The common exception prolog is used for all except a few exceptions
 370  * such as a segment miss on a kernel address.  We have to be prepared
 371  * to take another exception from the point where we first touch the
 372  * kernel stack onwards.
 373  *
 374  * On entry r13 points to the paca, r9-r13 are saved in the paca,
 375  * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
 376  * SRR1, and relocation is on.
 377  */
 378 #define EXCEPTION_PROLOG_COMMON(n, area)                                   \
 379         andi.   r10,r12,MSR_PR;         /* See if coming from user      */ \
 380         mr      r10,r1;                 /* Save r1                      */ \
 381         subi    r1,r1,INT_FRAME_SIZE;   /* alloc frame on kernel stack  */ \
 382         beq-    1f;                                                        \
 383         ld      r1,PACAKSAVE(r13);      /* kernel stack to use          */ \
 384 1:      cmpdi   cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace  */ \
 385         blt+    cr1,3f;                 /* abort if it is               */ \
 386         li      r1,(n);                 /* will be reloaded later       */ \
 387         sth     r1,PACA_TRAP_SAVE(r13);                                    \
 388         std     r3,area+EX_R3(r13);                                        \
 389         addi    r3,r13,area;            /* r3 -> where regs are saved*/    \
 390         RESTORE_CTR(r1, area);                                             \
 391         b       bad_stack;                                                 \
 392 3:      std     r9,_CCR(r1);            /* save CR in stackframe        */ \
 393         std     r11,_NIP(r1);           /* save SRR0 in stackframe      */ \
 394         std     r12,_MSR(r1);           /* save SRR1 in stackframe      */ \
 395         std     r10,0(r1);              /* make stack chain pointer     */ \
 396         std     r0,GPR0(r1);            /* save r0 in stackframe        */ \
 397         std     r10,GPR1(r1);           /* save r1 in stackframe        */ \
 398         beq     4f;                     /* if from kernel mode          */ \
 399         ACCOUNT_CPU_USER_ENTRY(r9, r10);                                   \
 400         SAVE_PPR(area, r9, r10);                                           \
 401 4:      EXCEPTION_PROLOG_COMMON_2(area)                                    \
 402         EXCEPTION_PROLOG_COMMON_3(n)                                       \
 403         ACCOUNT_STOLEN_TIME
 404
 405 /* Save original regs values from save area to stack frame. */
 406 #define EXCEPTION_PROLOG_COMMON_2(area)                                    \
 407         ld      r9,area+EX_R9(r13);     /* move r9, r10 to stackframe   */ \
 408         ld      r10,area+EX_R10(r13);                                      \
 409         std     r9,GPR9(r1);                                               \
 410         std     r10,GPR10(r1);                                             \
 411         ld      r9,area+EX_R11(r13);    /* move r11 - r13 to stackframe */ \
 412         ld      r10,area+EX_R12(r13);                                      \
 413         ld      r11,area+EX_R13(r13);                                      \
 414         std     r9,GPR11(r1);                                              \
 415         std     r10,GPR12(r1);                                             \
 416         std     r11,GPR13(r1);                                             \
 417         BEGIN_FTR_SECTION_NESTED(66);                                      \
 418         ld      r10,area+EX_CFAR(r13);                                     \
 419         std     r10,ORIG_GPR3(r1);                                         \
 420         END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66);            \
 421         GET_CTR(r10, area);                                                \
 422         std     r10,_CTR(r1);
 423
 424 #define EXCEPTION_PROLOG_COMMON_3(n)                                       \
 425         std     r2,GPR2(r1);            /* save r2 in stackframe        */ \
 426         SAVE_4GPRS(3, r1);              /* save r3 - r6 in stackframe   */ \
 427         SAVE_2GPRS(7, r1);              /* save r7, r8 in stackframe    */ \
 428         mflr    r9;                     /* Get LR, later save to stack  */ \
 429         ld      r2,PACATOC(r13);        /* get kernel TOC into r2       */ \
 430         std     r9,_LINK(r1);                                              \
 431         lbz     r10,PACASOFTIRQEN(r13);                            \
 432         mfspr   r11,SPRN_XER;           /* save XER in stackframe       */ \
 433         std     r10,SOFTE(r1);                                             \
 434         std     r11,_XER(r1);                                              \
 435         li      r9,(n)+1;                                                  \
 436         std     r9,_TRAP(r1);           /* set trap number              */ \
 437         li      r10,0;                                                     \
 438         ld      r11,exception_marker@toc(r2);                              \
 439         std     r10,RESULT(r1);         /* clear regs->result           */ \
 440         std     r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame      */
 441
 442 /*
 443  * Exception vectors.
 444  */
 445 #define STD_EXCEPTION_PSERIES(loc, vec, label)          \
 446         . = loc;                                        \
 447         .globl label##_pSeries;                         \
 448 label##_pSeries:                                        \
 449         HMT_MEDIUM_PPR_DISCARD;                         \
 450         SET_SCRATCH0(r13);              /* save r13 */          \
 451         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common,    \
 452                                  EXC_STD, KVMTEST_PR, vec)
 453
 454 /* Version of above for when we have to branch out-of-line */
 455 #define STD_EXCEPTION_PSERIES_OOL(vec, label)                   \
 456         .globl label##_pSeries;                                 \
 457 label##_pSeries:                                                \
 458         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec);        \
 459         EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD)
 460
 461 #define STD_EXCEPTION_HV(loc, vec, label)               \
 462         . = loc;                                        \
 463         .globl label##_hv;                              \
 464 label##_hv:                                             \
 465         HMT_MEDIUM_PPR_DISCARD;                         \
 466         SET_SCRATCH0(r13);      /* save r13 */                  \
 467         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common,    \
 468                                  EXC_HV, KVMTEST, vec)
 469
 470 /* Version of above for when we have to branch out-of-line */
 471 #define STD_EXCEPTION_HV_OOL(vec, label)                \
 472         .globl label##_hv;                              \
 473 label##_hv:                                             \
 474         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST, vec);   \
 475         EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV)
 476
 477 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label)    \
 478         . = loc;                                        \
 479         .globl label##_relon_pSeries;                   \
 480 label##_relon_pSeries:                                  \
 481         HMT_MEDIUM_PPR_DISCARD;                         \
 482         /* No guest interrupts come through here */     \
 483         SET_SCRATCH0(r13);              /* save r13 */  \
 484         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
 485                                        EXC_STD, NOTEST, vec)
 486
 487 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label)             \
 488         .globl label##_relon_pSeries;                           \
 489 label##_relon_pSeries:                                          \
 490         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 491         EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_STD)
 492
 493 #define STD_RELON_EXCEPTION_HV(loc, vec, label)         \
 494         . = loc;                                        \
 495         .globl label##_relon_hv;                        \
 496 label##_relon_hv:                                       \
 497         HMT_MEDIUM_PPR_DISCARD;                         \
 498         /* No guest interrupts come through here */     \
 499         SET_SCRATCH0(r13);      /* save r13 */          \
 500         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label##_common, \
 501                                        EXC_HV, NOTEST, vec)
 502
 503 #define STD_RELON_EXCEPTION_HV_OOL(vec, label)                  \
 504         .globl label##_relon_hv;                                \
 505 label##_relon_hv:                                               \
 506         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 507         EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, EXC_HV)
 508
 509 /* This associate vector numbers with bits in paca->irq_happened */
 510 #define SOFTEN_VALUE_0x500      PACA_IRQ_EE
 511 #define SOFTEN_VALUE_0x502      PACA_IRQ_EE
 512 #define SOFTEN_VALUE_0x900      PACA_IRQ_DEC
 513 #define SOFTEN_VALUE_0x982      PACA_IRQ_DEC
 514 #define SOFTEN_VALUE_0xa00      PACA_IRQ_DBELL
 515 #define SOFTEN_VALUE_0xe80      PACA_IRQ_DBELL
 516 #define SOFTEN_VALUE_0xe82      PACA_IRQ_DBELL
 517 #define SOFTEN_VALUE_0xe60      PACA_IRQ_HMI
 518 #define SOFTEN_VALUE_0xe62      PACA_IRQ_HMI
 519
 520 #define __SOFTEN_TEST(h, vec)                                           \
 521         lbz     r10,PACASOFTIRQEN(r13);                                 \
 522         cmpwi   r10,0;                                                  \
 523         li      r10,SOFTEN_VALUE_##vec;                                 \
 524         beq     masked_##h##interrupt
 525 #define _SOFTEN_TEST(h, vec)    __SOFTEN_TEST(h, vec)
 526
 527 #define SOFTEN_TEST_PR(vec)                                             \
 528         KVMTEST_PR(vec);                                                \
 529         _SOFTEN_TEST(EXC_STD, vec)
 530
 531 #define SOFTEN_TEST_HV(vec)                                             \
 532         KVMTEST(vec);                                                   \
 533         _SOFTEN_TEST(EXC_HV, vec)
 534
 535 #define SOFTEN_TEST_HV_201(vec)                                         \
 536         KVMTEST(vec);                                                   \
 537         _SOFTEN_TEST(EXC_STD, vec)
 538
 539 #define SOFTEN_NOTEST_PR(vec)           _SOFTEN_TEST(EXC_STD, vec)
 540 #define SOFTEN_NOTEST_HV(vec)           _SOFTEN_TEST(EXC_HV, vec)
 541
 542 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)              \
 543         SET_SCRATCH0(r13);    /* save r13 */                            \
 544         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 545         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 546         EXCEPTION_PROLOG_PSERIES_1(label##_common, h);
 547
 548 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)               \
 549         __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
 550
 551 #define MASKABLE_EXCEPTION_OOL(vec, label)                              \
 552         .globl label##_ool;                                             \
 553 label##_ool:                                                            \
 554         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec);            \
 555         EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD);
 556
 557 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label)                     \
 558         . = loc;                                                        \
 559         .globl label##_pSeries;                                         \
 560 label##_pSeries:                                                        \
 561         HMT_MEDIUM_PPR_DISCARD;                                         \
 562         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 563                                     EXC_STD, SOFTEN_TEST_PR)
 564
 565 #define MASKABLE_EXCEPTION_HV(loc, vec, label)                          \
 566         . = loc;                                                        \
 567         .globl label##_hv;                                              \
 568 label##_hv:                                                             \
 569         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 570                                     EXC_HV, SOFTEN_TEST_HV)
 571
 572 #define MASKABLE_EXCEPTION_HV_OOL(vec, label)                           \
 573         .globl label##_hv;                                              \
 574 label##_hv:                                                             \
 575         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec);            \
 576         EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV);
 577
 578 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)        \
 579         HMT_MEDIUM_PPR_DISCARD;                                         \
 580         SET_SCRATCH0(r13);    /* save r13 */                            \
 581         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 582         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);           \
 583         EXCEPTION_RELON_PROLOG_PSERIES_1(label##_common, h);
 584 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra) \
 585         __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)
 586
 587 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label)               \
 588         . = loc;                                                        \
 589         .globl label##_relon_pSeries;                                   \
 590 label##_relon_pSeries:                                                  \
 591         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 592                                           EXC_STD, SOFTEN_NOTEST_PR)
 593
 594 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label)                    \
 595         . = loc;                                                        \
 596         .globl label##_relon_hv;                                        \
 597 label##_relon_hv:                                                       \
 598         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 599                                           EXC_HV, SOFTEN_NOTEST_HV)
 600
 601 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label)                     \
 602         .globl label##_relon_hv;                                        \
 603 label##_relon_hv:                                                       \
 604         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_HV, vec);          \
 605         EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_HV);
 606
 607 #define MASKABLE_RELON_EXCEPTION_PSERIES_OOL(vec, label)               \
 608        .globl label##_relon_pSeries;                                   \
 609 label##_relon_pSeries:                                                 \
 610        EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_NOTEST_PR, vec);          \
 611        EXCEPTION_PROLOG_PSERIES_1(label##_common, EXC_STD)
 612
 613 /*
 614  * Our exception common code can be passed various "additions"
 615  * to specify the behaviour of interrupts, whether to kick the
 616  * runlatch, etc...
 617  */
 618
 619 /*
 620  * This addition reconciles our actual IRQ state with the various software
 621  * flags that track it. This may call C code.
 622  */
 623 #define ADD_RECONCILE   RECONCILE_IRQ_STATE(r10,r11)
 624
 625 #define ADD_NVGPRS                              \
 626         bl      save_nvgprs
 627
 628 #define RUNLATCH_ON                             \
 629 BEGIN_FTR_SECTION                               \
 630         CURRENT_THREAD_INFO(r3, r1);            \
 631         ld      r4,TI_LOCAL_FLAGS(r3);          \
 632         andi.   r0,r4,_TLF_RUNLATCH;            \
 633         beql    ppc64_runlatch_on_trampoline;   \
 634 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
 635
 636 #define EXCEPTION_COMMON(trap, label, hdlr, ret, additions)     \
 637         .align  7;                                              \
 638         .globl label##_common;                                  \
 639 label##_common:                                                 \
 640         EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN);              \
 641         /* Volatile regs are potentially clobbered here */      \
 642         additions;                                              \
 643         addi    r3,r1,STACK_FRAME_OVERHEAD;                     \
 644         bl      hdlr;                                           \
 645         b       ret
 646
 647 #define STD_EXCEPTION_COMMON(trap, label, hdlr)                 \
 648         EXCEPTION_COMMON(trap, label, hdlr, ret_from_except,    \
 649                          ADD_NVGPRS;ADD_RECONCILE)
 650
 651 /*
 652  * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
 653  * in the idle task and therefore need the special idle handling
 654  * (finish nap and runlatch)
 655  */
 656 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr)             \
 657         EXCEPTION_COMMON(trap, label, hdlr, ret_from_except_lite, \
 658                          FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
 659
 660 /*
 661  * When the idle code in power4_idle puts the CPU into NAP mode,
 662  * it has to do so in a loop, and relies on the external interrupt
 663  * and decrementer interrupt entry code to get it out of the loop.
 664  * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
 665  * to signal that it is in the loop and needs help to get out.
 666  */
 667 #ifdef CONFIG_PPC_970_NAP
 668 #define FINISH_NAP                              \
 669 BEGIN_FTR_SECTION                               \
 670         CURRENT_THREAD_INFO(r11, r1);           \
 671         ld      r9,TI_LOCAL_FLAGS(r11);         \
 672         andi.   r10,r9,_TLF_NAPPING;            \
 673         bnel    power4_fixup_nap;               \
 674 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
 675 #else
 676 #define FINISH_NAP
 677 #endif
 678
 679 #endif  /* _ASM_POWERPC_EXCEPTION_H */