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 /*
 101  * Branches from unrelocated code (e.g., interrupts) to labels outside
 102  * head-y require >64K offsets.
 103  */
 104 #define __LOAD_FAR_HANDLER(reg, label)                                  \
 105         ld      reg,PACAKBASE(r13);                                     \
 106         ori     reg,reg,(ABS_ADDR(label))@l;                            \
 107         addis   reg,reg,(ABS_ADDR(label))@h;
 108
 109 /* Exception register prefixes */
 110 #define EXC_HV  H
 111 #define EXC_STD
 112
 113 #if defined(CONFIG_RELOCATABLE)
 114 /*
 115  * If we support interrupts with relocation on AND we're a relocatable kernel,
 116  * we need to use CTR to get to the 2nd level handler.  So, save/restore it
 117  * when required.
 118  */
 119 #define SAVE_CTR(reg, area)     mfctr   reg ;   std     reg,area+EX_CTR(r13)
 120 #define GET_CTR(reg, area)                      ld      reg,area+EX_CTR(r13)
 121 #define RESTORE_CTR(reg, area)  ld      reg,area+EX_CTR(r13) ; mtctr reg
 122 #else
 123 /* ...else CTR is unused and in register. */
 124 #define SAVE_CTR(reg, area)
 125 #define GET_CTR(reg, area)      mfctr   reg
 126 #define RESTORE_CTR(reg, area)
 127 #endif
 128
 129 /*
 130  * PPR save/restore macros used in exceptions_64s.S
 131  * Used for P7 or later processors
 132  */
 133 #define SAVE_PPR(area, ra, rb)                                          \
 134 BEGIN_FTR_SECTION_NESTED(940)                                           \
 135         ld      ra,PACACURRENT(r13);                                    \
 136         ld      rb,area+EX_PPR(r13);    /* Read PPR from paca */        \
 137         std     rb,TASKTHREADPPR(ra);                                   \
 138 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
 139
 140 #define RESTORE_PPR_PACA(area, ra)                                      \
 141 BEGIN_FTR_SECTION_NESTED(941)                                           \
 142         ld      ra,area+EX_PPR(r13);                                    \
 143         mtspr   SPRN_PPR,ra;                                            \
 144 END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
 145
 146 /*
 147  * Get an SPR into a register if the CPU has the given feature
 148  */
 149 #define OPT_GET_SPR(ra, spr, ftr)                                       \
 150 BEGIN_FTR_SECTION_NESTED(943)                                           \
 151         mfspr   ra,spr;                                                 \
 152 END_FTR_SECTION_NESTED(ftr,ftr,943)
 153
 154 /*
 155  * Set an SPR from a register if the CPU has the given feature
 156  */
 157 #define OPT_SET_SPR(ra, spr, ftr)                                       \
 158 BEGIN_FTR_SECTION_NESTED(943)                                           \
 159         mtspr   spr,ra;                                                 \
 160 END_FTR_SECTION_NESTED(ftr,ftr,943)
 161
 162 /*
 163  * Save a register to the PACA if the CPU has the given feature
 164  */
 165 #define OPT_SAVE_REG_TO_PACA(offset, ra, ftr)                           \
 166 BEGIN_FTR_SECTION_NESTED(943)                                           \
 167         std     ra,offset(r13);                                         \
 168 END_FTR_SECTION_NESTED(ftr,ftr,943)
 169
 170 #define EXCEPTION_PROLOG_0(area)                                        \
 171         GET_PACA(r13);                                                  \
 172         std     r9,area+EX_R9(r13);     /* save r9 */                   \
 173         OPT_GET_SPR(r9, SPRN_PPR, CPU_FTR_HAS_PPR);                     \
 174         HMT_MEDIUM;                                                     \
 175         std     r10,area+EX_R10(r13);   /* save r10 - r12 */            \
 176         OPT_GET_SPR(r10, SPRN_CFAR, CPU_FTR_CFAR)
 177
 178 #define __EXCEPTION_PROLOG_1(area, extra, vec)                          \
 179         OPT_SAVE_REG_TO_PACA(area+EX_PPR, r9, CPU_FTR_HAS_PPR);         \
 180         OPT_SAVE_REG_TO_PACA(area+EX_CFAR, r10, CPU_FTR_CFAR);          \
 181         SAVE_CTR(r10, area);                                            \
 182         mfcr    r9;                                                     \
 183         extra(vec);                                                     \
 184         std     r11,area+EX_R11(r13);                                   \
 185         std     r12,area+EX_R12(r13);                                   \
 186         GET_SCRATCH0(r10);                                              \
 187         std     r10,area+EX_R13(r13)
 188 #define EXCEPTION_PROLOG_1(area, extra, vec)                            \
 189         __EXCEPTION_PROLOG_1(area, extra, vec)
 190
 191 #define __EXCEPTION_PROLOG_PSERIES_1(label, h)                          \
 192         ld      r10,PACAKMSR(r13);      /* get MSR value for kernel */  \
 193         mfspr   r11,SPRN_##h##SRR0;     /* save SRR0 */                 \
 194         LOAD_HANDLER(r12,label)                                         \
 195         mtspr   SPRN_##h##SRR0,r12;                                     \
 196         mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
 197         mtspr   SPRN_##h##SRR1,r10;                                     \
 198         h##rfid;                                                        \
 199         b       .       /* prevent speculative execution */
 200 #define EXCEPTION_PROLOG_PSERIES_1(label, h)                            \
 201         __EXCEPTION_PROLOG_PSERIES_1(label, h)
 202
 203 /* _NORI variant keeps MSR_RI clear */
 204 #define __EXCEPTION_PROLOG_PSERIES_1_NORI(label, h)                     \
 205         ld      r10,PACAKMSR(r13);      /* get MSR value for kernel */  \
 206         xori    r10,r10,MSR_RI;         /* Clear MSR_RI */              \
 207         mfspr   r11,SPRN_##h##SRR0;     /* save SRR0 */                 \
 208         LOAD_HANDLER(r12,label)                                         \
 209         mtspr   SPRN_##h##SRR0,r12;                                     \
 210         mfspr   r12,SPRN_##h##SRR1;     /* and SRR1 */                  \
 211         mtspr   SPRN_##h##SRR1,r10;                                     \
 212         h##rfid;                                                        \
 213         b       .       /* prevent speculative execution */
 214
 215 #define EXCEPTION_PROLOG_PSERIES_1_NORI(label, h)                       \
 216         __EXCEPTION_PROLOG_PSERIES_1_NORI(label, h)
 217
 218 #define EXCEPTION_PROLOG_PSERIES(area, label, h, extra, vec)            \
 219         EXCEPTION_PROLOG_0(area);                                       \
 220         EXCEPTION_PROLOG_1(area, extra, vec);                           \
 221         EXCEPTION_PROLOG_PSERIES_1(label, h);
 222
 223 #define __KVMTEST(h, n)                                                 \
 224         lbz     r10,HSTATE_IN_GUEST(r13);                               \
 225         cmpwi   r10,0;                                                  \
 226         bne     do_kvm_##h##n
 227
 228 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 229 /*
 230  * If hv is possible, interrupts come into to the hv version
 231  * of the kvmppc_interrupt code, which then jumps to the PR handler,
 232  * kvmppc_interrupt_pr, if the guest is a PR guest.
 233  */
 234 #define kvmppc_interrupt kvmppc_interrupt_hv
 235 #else
 236 #define kvmppc_interrupt kvmppc_interrupt_pr
 237 #endif
 238
 239 #ifdef CONFIG_RELOCATABLE
 240 #define BRANCH_TO_COMMON(reg, label)                                    \
 241         __LOAD_HANDLER(reg, label);                                     \
 242         mtctr   reg;                                                    \
 243         bctr
 244
 245 #define BRANCH_LINK_TO_FAR(label)                                       \
 246         __LOAD_FAR_HANDLER(r12, label);                                 \
 247         mtctr   r12;                                                    \
 248         bctrl
 249
 250 /*
 251  * KVM requires __LOAD_FAR_HANDLER.
 252  *
 253  * __BRANCH_TO_KVM_EXIT branches are also a special case because they
 254  * explicitly use r9 then reload it from PACA before branching. Hence
 255  * the double-underscore.
 256  */
 257 #define __BRANCH_TO_KVM_EXIT(area, label)                               \
 258         mfctr   r9;                                                     \
 259         std     r9,HSTATE_SCRATCH1(r13);                                \
 260         __LOAD_FAR_HANDLER(r9, label);                                  \
 261         mtctr   r9;                                                     \
 262         ld      r9,area+EX_R9(r13);                                     \
 263         bctr
 264
 265 #else
 266 #define BRANCH_TO_COMMON(reg, label)                                    \
 267         b       label
 268
 269 #define BRANCH_LINK_TO_FAR(label)                                       \
 270         bl      label
 271
 272 #define __BRANCH_TO_KVM_EXIT(area, label)                               \
 273         ld      r9,area+EX_R9(r13);                                     \
 274         b       label
 275
 276 #endif
 277
 278 /* Do not enable RI */
 279 #define EXCEPTION_PROLOG_PSERIES_NORI(area, label, h, extra, vec)       \
 280         EXCEPTION_PROLOG_0(area);                                       \
 281         EXCEPTION_PROLOG_1(area, extra, vec);                           \
 282         EXCEPTION_PROLOG_PSERIES_1_NORI(label, h);
 283
 284
 285 #define __KVM_HANDLER(area, h, n)                                       \
 286         BEGIN_FTR_SECTION_NESTED(947)                                   \
 287         ld      r10,area+EX_CFAR(r13);                                  \
 288         std     r10,HSTATE_CFAR(r13);                                   \
 289         END_FTR_SECTION_NESTED(CPU_FTR_CFAR,CPU_FTR_CFAR,947);          \
 290         BEGIN_FTR_SECTION_NESTED(948)                                   \
 291         ld      r10,area+EX_PPR(r13);                                   \
 292         std     r10,HSTATE_PPR(r13);                                    \
 293         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 294         ld      r10,area+EX_R10(r13);                                   \
 295         std     r12,HSTATE_SCRATCH0(r13);                               \
 296         sldi    r12,r9,32;                                              \
 297         ori     r12,r12,(n);                                            \
 298         /* This reloads r9 before branching to kvmppc_interrupt */      \
 299         __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt)
 300
 301 #define __KVM_HANDLER_SKIP(area, h, n)                                  \
 302         cmpwi   r10,KVM_GUEST_MODE_SKIP;                                \
 303         beq     89f;                                                    \
 304         BEGIN_FTR_SECTION_NESTED(948)                                   \
 305         ld      r10,area+EX_PPR(r13);                                   \
 306         std     r10,HSTATE_PPR(r13);                                    \
 307         END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,948);    \
 308         ld      r10,area+EX_R10(r13);                                   \
 309         std     r12,HSTATE_SCRATCH0(r13);                               \
 310         sldi    r12,r9,32;                                              \
 311         ori     r12,r12,(n);                                            \
 312         /* This reloads r9 before branching to kvmppc_interrupt */      \
 313         __BRANCH_TO_KVM_EXIT(area, kvmppc_interrupt);                   \
 314 89:     mtocrf  0x80,r9;                                                \
 315         ld      r9,area+EX_R9(r13);                                     \
 316         ld      r10,area+EX_R10(r13);                                   \
 317         b       kvmppc_skip_##h##interrupt
 318
 319 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 320 #define KVMTEST(h, n)                   __KVMTEST(h, n)
 321 #define KVM_HANDLER(area, h, n)         __KVM_HANDLER(area, h, n)
 322 #define KVM_HANDLER_SKIP(area, h, n)    __KVM_HANDLER_SKIP(area, h, n)
 323
 324 #else
 325 #define KVMTEST(h, n)
 326 #define KVM_HANDLER(area, h, n)
 327 #define KVM_HANDLER_SKIP(area, h, n)
 328 #endif
 329
 330 #define NOTEST(n)
 331
 332 #define EXCEPTION_PROLOG_COMMON_1()                                        \
 333         std     r9,_CCR(r1);            /* save CR in stackframe        */ \
 334         std     r11,_NIP(r1);           /* save SRR0 in stackframe      */ \
 335         std     r12,_MSR(r1);           /* save SRR1 in stackframe      */ \
 336         std     r10,0(r1);              /* make stack chain pointer     */ \
 337         std     r0,GPR0(r1);            /* save r0 in stackframe        */ \
 338         std     r10,GPR1(r1);           /* save r1 in stackframe        */ \
 339
 340
 341 /*
 342  * The common exception prolog is used for all except a few exceptions
 343  * such as a segment miss on a kernel address.  We have to be prepared
 344  * to take another exception from the point where we first touch the
 345  * kernel stack onwards.
 346  *
 347  * On entry r13 points to the paca, r9-r13 are saved in the paca,
 348  * r9 contains the saved CR, r11 and r12 contain the saved SRR0 and
 349  * SRR1, and relocation is on.
 350  */
 351 #define EXCEPTION_PROLOG_COMMON(n, area)                                   \
 352         andi.   r10,r12,MSR_PR;         /* See if coming from user      */ \
 353         mr      r10,r1;                 /* Save r1                      */ \
 354         subi    r1,r1,INT_FRAME_SIZE;   /* alloc frame on kernel stack  */ \
 355         beq-    1f;                                                        \
 356         ld      r1,PACAKSAVE(r13);      /* kernel stack to use          */ \
 357 1:      cmpdi   cr1,r1,-INT_FRAME_SIZE; /* check if r1 is in userspace  */ \
 358         blt+    cr1,3f;                 /* abort if it is               */ \
 359         li      r1,(n);                 /* will be reloaded later       */ \
 360         sth     r1,PACA_TRAP_SAVE(r13);                                    \
 361         std     r3,area+EX_R3(r13);                                        \
 362         addi    r3,r13,area;            /* r3 -> where regs are saved*/    \
 363         RESTORE_CTR(r1, area);                                             \
 364         b       bad_stack;                                                 \
 365 3:      EXCEPTION_PROLOG_COMMON_1();                                       \
 366         beq     4f;                     /* if from kernel mode          */ \
 367         ACCOUNT_CPU_USER_ENTRY(r13, r9, r10);                              \
 368         SAVE_PPR(area, r9, r10);                                           \
 369 4:      EXCEPTION_PROLOG_COMMON_2(area)                                    \
 370         EXCEPTION_PROLOG_COMMON_3(n)                                       \
 371         ACCOUNT_STOLEN_TIME
 372
 373 /* Save original regs values from save area to stack frame. */
 374 #define EXCEPTION_PROLOG_COMMON_2(area)                                    \
 375         ld      r9,area+EX_R9(r13);     /* move r9, r10 to stackframe   */ \
 376         ld      r10,area+EX_R10(r13);                                      \
 377         std     r9,GPR9(r1);                                               \
 378         std     r10,GPR10(r1);                                             \
 379         ld      r9,area+EX_R11(r13);    /* move r11 - r13 to stackframe */ \
 380         ld      r10,area+EX_R12(r13);                                      \
 381         ld      r11,area+EX_R13(r13);                                      \
 382         std     r9,GPR11(r1);                                              \
 383         std     r10,GPR12(r1);                                             \
 384         std     r11,GPR13(r1);                                             \
 385         BEGIN_FTR_SECTION_NESTED(66);                                      \
 386         ld      r10,area+EX_CFAR(r13);                                     \
 387         std     r10,ORIG_GPR3(r1);                                         \
 388         END_FTR_SECTION_NESTED(CPU_FTR_CFAR, CPU_FTR_CFAR, 66);            \
 389         GET_CTR(r10, area);                                                \
 390         std     r10,_CTR(r1);
 391
 392 #define EXCEPTION_PROLOG_COMMON_3(n)                                       \
 393         std     r2,GPR2(r1);            /* save r2 in stackframe        */ \
 394         SAVE_4GPRS(3, r1);              /* save r3 - r6 in stackframe   */ \
 395         SAVE_2GPRS(7, r1);              /* save r7, r8 in stackframe    */ \
 396         mflr    r9;                     /* Get LR, later save to stack  */ \
 397         ld      r2,PACATOC(r13);        /* get kernel TOC into r2       */ \
 398         std     r9,_LINK(r1);                                              \
 399         lbz     r10,PACASOFTIRQEN(r13);                            \
 400         mfspr   r11,SPRN_XER;           /* save XER in stackframe       */ \
 401         std     r10,SOFTE(r1);                                             \
 402         std     r11,_XER(r1);                                              \
 403         li      r9,(n)+1;                                                  \
 404         std     r9,_TRAP(r1);           /* set trap number              */ \
 405         li      r10,0;                                                     \
 406         ld      r11,exception_marker@toc(r2);                              \
 407         std     r10,RESULT(r1);         /* clear regs->result           */ \
 408         std     r11,STACK_FRAME_OVERHEAD-16(r1); /* mark the frame      */
 409
 410 /*
 411  * Exception vectors.
 412  */
 413 #define STD_EXCEPTION_PSERIES(vec, label)                       \
 414         SET_SCRATCH0(r13);              /* save r13 */          \
 415         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label,             \
 416                                  EXC_STD, KVMTEST_PR, vec);     \
 417
 418 /* Version of above for when we have to branch out-of-line */
 419 #define __OOL_EXCEPTION(vec, label, hdlr)                       \
 420         SET_SCRATCH0(r13)                                       \
 421         EXCEPTION_PROLOG_0(PACA_EXGEN)                          \
 422         b hdlr;
 423
 424 #define STD_EXCEPTION_PSERIES_OOL(vec, label)                   \
 425         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_PR, vec);        \
 426         EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 427
 428 #define STD_EXCEPTION_HV(loc, vec, label)                       \
 429         SET_SCRATCH0(r13);      /* save r13 */                  \
 430         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label,             \
 431                                  EXC_HV, KVMTEST_HV, vec);
 432
 433 #define STD_EXCEPTION_HV_OOL(vec, label)                        \
 434         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec);        \
 435         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 436
 437 #define STD_RELON_EXCEPTION_PSERIES(loc, vec, label)    \
 438         /* No guest interrupts come through here */     \
 439         SET_SCRATCH0(r13);              /* save r13 */  \
 440         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label, EXC_STD, NOTEST, vec);
 441
 442 #define STD_RELON_EXCEPTION_PSERIES_OOL(vec, label)             \
 443         EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, vec);            \
 444         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_STD)
 445
 446 #define STD_RELON_EXCEPTION_HV(loc, vec, label)         \
 447         SET_SCRATCH0(r13);      /* save r13 */          \
 448         EXCEPTION_RELON_PROLOG_PSERIES(PACA_EXGEN, label,       \
 449                                        EXC_HV, KVMTEST_HV, vec);
 450
 451 #define STD_RELON_EXCEPTION_HV_OOL(vec, label)                  \
 452         EXCEPTION_PROLOG_1(PACA_EXGEN, KVMTEST_HV, vec);        \
 453         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV)
 454
 455 /* This associate vector numbers with bits in paca->irq_happened */
 456 #define SOFTEN_VALUE_0x500      PACA_IRQ_EE
 457 #define SOFTEN_VALUE_0x900      PACA_IRQ_DEC
 458 #define SOFTEN_VALUE_0x980      PACA_IRQ_DEC
 459 #define SOFTEN_VALUE_0xa00      PACA_IRQ_DBELL
 460 #define SOFTEN_VALUE_0xe80      PACA_IRQ_DBELL
 461 #define SOFTEN_VALUE_0xe60      PACA_IRQ_HMI
 462 #define SOFTEN_VALUE_0xea0      PACA_IRQ_EE
 463
 464 #define __SOFTEN_TEST(h, vec)                                           \
 465         lbz     r10,PACASOFTIRQEN(r13);                                 \
 466         cmpwi   r10,0;                                                  \
 467         li      r10,SOFTEN_VALUE_##vec;                                 \
 468         beq     masked_##h##interrupt
 469
 470 #define _SOFTEN_TEST(h, vec)    __SOFTEN_TEST(h, vec)
 471
 472 #define SOFTEN_TEST_PR(vec)                                             \
 473         KVMTEST(EXC_STD, vec);                                          \
 474         _SOFTEN_TEST(EXC_STD, vec)
 475
 476 #define SOFTEN_TEST_HV(vec)                                             \
 477         KVMTEST(EXC_HV, vec);                                           \
 478         _SOFTEN_TEST(EXC_HV, vec)
 479
 480 #define KVMTEST_PR(vec)                                                 \
 481         KVMTEST(EXC_STD, vec)
 482
 483 #define KVMTEST_HV(vec)                                                 \
 484         KVMTEST(EXC_HV, vec)
 485
 486 #define SOFTEN_NOTEST_PR(vec)           _SOFTEN_TEST(EXC_STD, vec)
 487 #define SOFTEN_NOTEST_HV(vec)           _SOFTEN_TEST(EXC_HV, vec)
 488
 489 #define __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)              \
 490         SET_SCRATCH0(r13);    /* save r13 */                            \
 491         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 492         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 493         EXCEPTION_PROLOG_PSERIES_1(label, h);
 494
 495 #define _MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)               \
 496         __MASKABLE_EXCEPTION_PSERIES(vec, label, h, extra)
 497
 498 #define MASKABLE_EXCEPTION_PSERIES(loc, vec, label)                     \
 499         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 500                                     EXC_STD, SOFTEN_TEST_PR)
 501
 502 #define MASKABLE_EXCEPTION_PSERIES_OOL(vec, label)                      \
 503         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_PR, vec);            \
 504         EXCEPTION_PROLOG_PSERIES_1(label, EXC_STD)
 505
 506 #define MASKABLE_EXCEPTION_HV(loc, vec, label)                          \
 507         _MASKABLE_EXCEPTION_PSERIES(vec, label,                         \
 508                                     EXC_HV, SOFTEN_TEST_HV)
 509
 510 #define MASKABLE_EXCEPTION_HV_OOL(vec, label)                           \
 511         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec);            \
 512         EXCEPTION_PROLOG_PSERIES_1(label, EXC_HV)
 513
 514 #define __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)        \
 515         SET_SCRATCH0(r13);    /* save r13 */                            \
 516         EXCEPTION_PROLOG_0(PACA_EXGEN);                                 \
 517         __EXCEPTION_PROLOG_1(PACA_EXGEN, extra, vec);                   \
 518         EXCEPTION_RELON_PROLOG_PSERIES_1(label, h)
 519
 520 #define _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)         \
 521         __MASKABLE_RELON_EXCEPTION_PSERIES(vec, label, h, extra)
 522
 523 #define MASKABLE_RELON_EXCEPTION_PSERIES(loc, vec, label)               \
 524         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 525                                           EXC_STD, SOFTEN_NOTEST_PR)
 526
 527 #define MASKABLE_RELON_EXCEPTION_HV(loc, vec, label)                    \
 528         _MASKABLE_RELON_EXCEPTION_PSERIES(vec, label,                   \
 529                                           EXC_HV, SOFTEN_TEST_HV)
 530
 531 #define MASKABLE_RELON_EXCEPTION_HV_OOL(vec, label)                     \
 532         EXCEPTION_PROLOG_1(PACA_EXGEN, SOFTEN_TEST_HV, vec);            \
 533         EXCEPTION_RELON_PROLOG_PSERIES_1(label, EXC_HV)
 534
 535 /*
 536  * Our exception common code can be passed various "additions"
 537  * to specify the behaviour of interrupts, whether to kick the
 538  * runlatch, etc...
 539  */
 540
 541 /*
 542  * This addition reconciles our actual IRQ state with the various software
 543  * flags that track it. This may call C code.
 544  */
 545 #define ADD_RECONCILE   RECONCILE_IRQ_STATE(r10,r11)
 546
 547 #define ADD_NVGPRS                              \
 548         bl      save_nvgprs
 549
 550 #define RUNLATCH_ON                             \
 551 BEGIN_FTR_SECTION                               \
 552         CURRENT_THREAD_INFO(r3, r1);            \
 553         ld      r4,TI_LOCAL_FLAGS(r3);          \
 554         andi.   r0,r4,_TLF_RUNLATCH;            \
 555         beql    ppc64_runlatch_on_trampoline;   \
 556 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
 557
 558 #define EXCEPTION_COMMON(area, trap, label, hdlr, ret, additions) \
 559         EXCEPTION_PROLOG_COMMON(trap, area);                    \
 560         /* Volatile regs are potentially clobbered here */      \
 561         additions;                                              \
 562         addi    r3,r1,STACK_FRAME_OVERHEAD;                     \
 563         bl      hdlr;                                           \
 564         b       ret
 565
 566 /*
 567  * Exception where stack is already set in r1, r1 is saved in r10, and it
 568  * continues rather than returns.
 569  */
 570 #define EXCEPTION_COMMON_NORET_STACK(area, trap, label, hdlr, additions) \
 571         EXCEPTION_PROLOG_COMMON_1();                            \
 572         EXCEPTION_PROLOG_COMMON_2(area);                        \
 573         EXCEPTION_PROLOG_COMMON_3(trap);                        \
 574         /* Volatile regs are potentially clobbered here */      \
 575         additions;                                              \
 576         addi    r3,r1,STACK_FRAME_OVERHEAD;                     \
 577         bl      hdlr
 578
 579 #define STD_EXCEPTION_COMMON(trap, label, hdlr)                 \
 580         EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr,         \
 581                 ret_from_except, ADD_NVGPRS;ADD_RECONCILE)
 582
 583 /*
 584  * Like STD_EXCEPTION_COMMON, but for exceptions that can occur
 585  * in the idle task and therefore need the special idle handling
 586  * (finish nap and runlatch)
 587  */
 588 #define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr)           \
 589         EXCEPTION_COMMON(PACA_EXGEN, trap, label, hdlr,         \
 590                 ret_from_except_lite, FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON)
 591
 592 /*
 593  * When the idle code in power4_idle puts the CPU into NAP mode,
 594  * it has to do so in a loop, and relies on the external interrupt
 595  * and decrementer interrupt entry code to get it out of the loop.
 596  * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
 597  * to signal that it is in the loop and needs help to get out.
 598  */
 599 #ifdef CONFIG_PPC_970_NAP
 600 #define FINISH_NAP                              \
 601 BEGIN_FTR_SECTION                               \
 602         CURRENT_THREAD_INFO(r11, r1);           \
 603         ld      r9,TI_LOCAL_FLAGS(r11);         \
 604         andi.   r10,r9,_TLF_NAPPING;            \
 605         bnel    power4_fixup_nap;               \
 606 END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
 607 #else
 608 #define FINISH_NAP
 609 #endif
 610
 611 #endif  /* _ASM_POWERPC_EXCEPTION_H */