arch/powerpc/include/asm/ppc_asm.h

   1 /*
   2  * Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan.
   3  */
   4 #ifndef _ASM_POWERPC_PPC_ASM_H
   5 #define _ASM_POWERPC_PPC_ASM_H
   6
   7 #include <linux/stringify.h>
   8 #include <asm/asm-compat.h>
   9 #include <asm/processor.h>
  10 #include <asm/ppc-opcode.h>
  11 #include <asm/firmware.h>
  12
  13 #ifndef __ASSEMBLY__
  14 #error __FILE__ should only be used in assembler files
  15 #else
  16
  17 #define SZL                     (BITS_PER_LONG/8)
  18
  19 /*
  20  * Stuff for accurate CPU time accounting.
  21  * These macros handle transitions between user and system state
  22  * in exception entry and exit and accumulate time to the
  23  * user_time and system_time fields in the paca.
  24  */
  25
  26 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  27 #define ACCOUNT_CPU_USER_ENTRY(ra, rb)
  28 #define ACCOUNT_CPU_USER_EXIT(ra, rb)
  29 #define ACCOUNT_STOLEN_TIME
  30 #else
  31 #define ACCOUNT_CPU_USER_ENTRY(ra, rb)                                  \
  32         MFTB(ra);                       /* get timebase */              \
  33         ld      rb,PACA_STARTTIME_USER(r13);                            \
  34         std     ra,PACA_STARTTIME(r13);                                 \
  35         subf    rb,rb,ra;               /* subtract start value */      \
  36         ld      ra,PACA_USER_TIME(r13);                                 \
  37         add     ra,ra,rb;               /* add on to user time */       \
  38         std     ra,PACA_USER_TIME(r13);                                 \
  39
  40 #define ACCOUNT_CPU_USER_EXIT(ra, rb)                                   \
  41         MFTB(ra);                       /* get timebase */              \
  42         ld      rb,PACA_STARTTIME(r13);                                 \
  43         std     ra,PACA_STARTTIME_USER(r13);                            \
  44         subf    rb,rb,ra;               /* subtract start value */      \
  45         ld      ra,PACA_SYSTEM_TIME(r13);                               \
  46         add     ra,ra,rb;               /* add on to system time */     \
  47         std     ra,PACA_SYSTEM_TIME(r13)
  48
  49 #ifdef CONFIG_PPC_SPLPAR
  50 #define ACCOUNT_STOLEN_TIME                                             \
  51 BEGIN_FW_FTR_SECTION;                                                   \
  52         beq     33f;                                                    \
  53         /* from user - see if there are any DTL entries to process */   \
  54         ld      r10,PACALPPACAPTR(r13); /* get ptr to VPA */            \
  55         ld      r11,PACA_DTL_RIDX(r13); /* get log read index */        \
  56         addi    r10,r10,LPPACA_DTLIDX;                                  \
  57         LDX_BE  r10,0,r10;              /* get log write index */       \
  58         cmpd    cr1,r11,r10;                                            \
  59         beq+    cr1,33f;                                                \
  60         bl      accumulate_stolen_time;                         \
  61         ld      r12,_MSR(r1);                                           \
  62         andi.   r10,r12,MSR_PR;         /* Restore cr0 (coming from user) */ \
  63 33:                                                                     \
  64 END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
  65
  66 #else  /* CONFIG_PPC_SPLPAR */
  67 #define ACCOUNT_STOLEN_TIME
  68
  69 #endif /* CONFIG_PPC_SPLPAR */
  70
  71 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
  72
  73 /*
  74  * Macros for storing registers into and loading registers from
  75  * exception frames.
  76  */
  77 #ifdef __powerpc64__
  78 #define SAVE_GPR(n, base)       std     n,GPR0+8*(n)(base)
  79 #define REST_GPR(n, base)       ld      n,GPR0+8*(n)(base)
  80 #define SAVE_NVGPRS(base)       SAVE_8GPRS(14, base); SAVE_10GPRS(22, base)
  81 #define REST_NVGPRS(base)       REST_8GPRS(14, base); REST_10GPRS(22, base)
  82 #else
  83 #define SAVE_GPR(n, base)       stw     n,GPR0+4*(n)(base)
  84 #define REST_GPR(n, base)       lwz     n,GPR0+4*(n)(base)
  85 #define SAVE_NVGPRS(base)       SAVE_GPR(13, base); SAVE_8GPRS(14, base); \
  86                                 SAVE_10GPRS(22, base)
  87 #define REST_NVGPRS(base)       REST_GPR(13, base); REST_8GPRS(14, base); \
  88                                 REST_10GPRS(22, base)
  89 #endif
  90
  91 #define SAVE_2GPRS(n, base)     SAVE_GPR(n, base); SAVE_GPR(n+1, base)
  92 #define SAVE_4GPRS(n, base)     SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
  93 #define SAVE_8GPRS(n, base)     SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
  94 #define SAVE_10GPRS(n, base)    SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
  95 #define REST_2GPRS(n, base)     REST_GPR(n, base); REST_GPR(n+1, base)
  96 #define REST_4GPRS(n, base)     REST_2GPRS(n, base); REST_2GPRS(n+2, base)
  97 #define REST_8GPRS(n, base)     REST_4GPRS(n, base); REST_4GPRS(n+4, base)
  98 #define REST_10GPRS(n, base)    REST_8GPRS(n, base); REST_2GPRS(n+8, base)
  99
 100 #define SAVE_FPR(n, base)       stfd    n,8*TS_FPRWIDTH*(n)(base)
 101 #define SAVE_2FPRS(n, base)     SAVE_FPR(n, base); SAVE_FPR(n+1, base)
 102 #define SAVE_4FPRS(n, base)     SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
 103 #define SAVE_8FPRS(n, base)     SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
 104 #define SAVE_16FPRS(n, base)    SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
 105 #define SAVE_32FPRS(n, base)    SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
 106 #define REST_FPR(n, base)       lfd     n,8*TS_FPRWIDTH*(n)(base)
 107 #define REST_2FPRS(n, base)     REST_FPR(n, base); REST_FPR(n+1, base)
 108 #define REST_4FPRS(n, base)     REST_2FPRS(n, base); REST_2FPRS(n+2, base)
 109 #define REST_8FPRS(n, base)     REST_4FPRS(n, base); REST_4FPRS(n+4, base)
 110 #define REST_16FPRS(n, base)    REST_8FPRS(n, base); REST_8FPRS(n+8, base)
 111 #define REST_32FPRS(n, base)    REST_16FPRS(n, base); REST_16FPRS(n+16, base)
 112
 113 #define SAVE_VR(n,b,base)       li b,16*(n);  stvx n,base,b
 114 #define SAVE_2VRS(n,b,base)     SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
 115 #define SAVE_4VRS(n,b,base)     SAVE_2VRS(n,b,base); SAVE_2VRS(n+2,b,base)
 116 #define SAVE_8VRS(n,b,base)     SAVE_4VRS(n,b,base); SAVE_4VRS(n+4,b,base)
 117 #define SAVE_16VRS(n,b,base)    SAVE_8VRS(n,b,base); SAVE_8VRS(n+8,b,base)
 118 #define SAVE_32VRS(n,b,base)    SAVE_16VRS(n,b,base); SAVE_16VRS(n+16,b,base)
 119 #define REST_VR(n,b,base)       li b,16*(n); lvx n,base,b
 120 #define REST_2VRS(n,b,base)     REST_VR(n,b,base); REST_VR(n+1,b,base)
 121 #define REST_4VRS(n,b,base)     REST_2VRS(n,b,base); REST_2VRS(n+2,b,base)
 122 #define REST_8VRS(n,b,base)     REST_4VRS(n,b,base); REST_4VRS(n+4,b,base)
 123 #define REST_16VRS(n,b,base)    REST_8VRS(n,b,base); REST_8VRS(n+8,b,base)
 124 #define REST_32VRS(n,b,base)    REST_16VRS(n,b,base); REST_16VRS(n+16,b,base)
 125
 126 #ifdef __BIG_ENDIAN__
 127 #define STXVD2X_ROT(n,b,base)           STXVD2X(n,b,base)
 128 #define LXVD2X_ROT(n,b,base)            LXVD2X(n,b,base)
 129 #else
 130 #define STXVD2X_ROT(n,b,base)           XXSWAPD(n,n);           \
 131                                         STXVD2X(n,b,base);      \
 132                                         XXSWAPD(n,n)
 133
 134 #define LXVD2X_ROT(n,b,base)            LXVD2X(n,b,base);       \
 135                                         XXSWAPD(n,n)
 136 #endif
 137 /* Save the lower 32 VSRs in the thread VSR region */
 138 #define SAVE_VSR(n,b,base)      li b,16*(n);  STXVD2X_ROT(n,R##base,R##b)
 139 #define SAVE_2VSRS(n,b,base)    SAVE_VSR(n,b,base); SAVE_VSR(n+1,b,base)
 140 #define SAVE_4VSRS(n,b,base)    SAVE_2VSRS(n,b,base); SAVE_2VSRS(n+2,b,base)
 141 #define SAVE_8VSRS(n,b,base)    SAVE_4VSRS(n,b,base); SAVE_4VSRS(n+4,b,base)
 142 #define SAVE_16VSRS(n,b,base)   SAVE_8VSRS(n,b,base); SAVE_8VSRS(n+8,b,base)
 143 #define SAVE_32VSRS(n,b,base)   SAVE_16VSRS(n,b,base); SAVE_16VSRS(n+16,b,base)
 144 #define REST_VSR(n,b,base)      li b,16*(n); LXVD2X_ROT(n,R##base,R##b)
 145 #define REST_2VSRS(n,b,base)    REST_VSR(n,b,base); REST_VSR(n+1,b,base)
 146 #define REST_4VSRS(n,b,base)    REST_2VSRS(n,b,base); REST_2VSRS(n+2,b,base)
 147 #define REST_8VSRS(n,b,base)    REST_4VSRS(n,b,base); REST_4VSRS(n+4,b,base)
 148 #define REST_16VSRS(n,b,base)   REST_8VSRS(n,b,base); REST_8VSRS(n+8,b,base)
 149 #define REST_32VSRS(n,b,base)   REST_16VSRS(n,b,base); REST_16VSRS(n+16,b,base)
 150
 151 /*
 152  * b = base register for addressing, o = base offset from register of 1st EVR
 153  * n = first EVR, s = scratch
 154  */
 155 #define SAVE_EVR(n,s,b,o)       evmergehi s,s,n; stw s,o+4*(n)(b)
 156 #define SAVE_2EVRS(n,s,b,o)     SAVE_EVR(n,s,b,o); SAVE_EVR(n+1,s,b,o)
 157 #define SAVE_4EVRS(n,s,b,o)     SAVE_2EVRS(n,s,b,o); SAVE_2EVRS(n+2,s,b,o)
 158 #define SAVE_8EVRS(n,s,b,o)     SAVE_4EVRS(n,s,b,o); SAVE_4EVRS(n+4,s,b,o)
 159 #define SAVE_16EVRS(n,s,b,o)    SAVE_8EVRS(n,s,b,o); SAVE_8EVRS(n+8,s,b,o)
 160 #define SAVE_32EVRS(n,s,b,o)    SAVE_16EVRS(n,s,b,o); SAVE_16EVRS(n+16,s,b,o)
 161 #define REST_EVR(n,s,b,o)       lwz s,o+4*(n)(b); evmergelo n,s,n
 162 #define REST_2EVRS(n,s,b,o)     REST_EVR(n,s,b,o); REST_EVR(n+1,s,b,o)
 163 #define REST_4EVRS(n,s,b,o)     REST_2EVRS(n,s,b,o); REST_2EVRS(n+2,s,b,o)
 164 #define REST_8EVRS(n,s,b,o)     REST_4EVRS(n,s,b,o); REST_4EVRS(n+4,s,b,o)
 165 #define REST_16EVRS(n,s,b,o)    REST_8EVRS(n,s,b,o); REST_8EVRS(n+8,s,b,o)
 166 #define REST_32EVRS(n,s,b,o)    REST_16EVRS(n,s,b,o); REST_16EVRS(n+16,s,b,o)
 167
 168 /* Macros to adjust thread priority for hardware multithreading */
 169 #define HMT_VERY_LOW    or      31,31,31        # very low priority
 170 #define HMT_LOW         or      1,1,1
 171 #define HMT_MEDIUM_LOW  or      6,6,6           # medium low priority
 172 #define HMT_MEDIUM      or      2,2,2
 173 #define HMT_MEDIUM_HIGH or      5,5,5           # medium high priority
 174 #define HMT_HIGH        or      3,3,3
 175 #define HMT_EXTRA_HIGH  or      7,7,7           # power7 only
 176
 177 #ifdef CONFIG_PPC64
 178 #define ULONG_SIZE      8
 179 #else
 180 #define ULONG_SIZE      4
 181 #endif
 182 #define __VCPU_GPR(n)   (VCPU_GPRS + (n * ULONG_SIZE))
 183 #define VCPU_GPR(n)     __VCPU_GPR(__REG_##n)
 184
 185 #ifdef __KERNEL__
 186 #ifdef CONFIG_PPC64
 187
 188 #define STACKFRAMESIZE 256
 189 #define __STK_REG(i)   (112 + ((i)-14)*8)
 190 #define STK_REG(i)     __STK_REG(__REG_##i)
 191
 192 #if defined(_CALL_ELF) && _CALL_ELF == 2
 193 #define STK_GOT         24
 194 #define __STK_PARAM(i)  (32 + ((i)-3)*8)
 195 #else
 196 #define STK_GOT         40
 197 #define __STK_PARAM(i)  (48 + ((i)-3)*8)
 198 #endif
 199 #define STK_PARAM(i)    __STK_PARAM(__REG_##i)
 200
 201 #if defined(_CALL_ELF) && _CALL_ELF == 2
 202
 203 #define _GLOBAL(name) \
 204         .section ".text"; \
 205         .align 2 ; \
 206         .type name,@function; \
 207         .globl name; \
 208 name:
 209
 210 #define _GLOBAL_TOC(name) \
 211         .section ".text"; \
 212         .align 2 ; \
 213         .type name,@function; \
 214         .globl name; \
 215 name: \
 216 0:      addis r2,r12,(.TOC.-0b)@ha; \
 217         addi r2,r2,(.TOC.-0b)@l; \
 218         .localentry name,.-name
 219
 220 #define _KPROBE(name) \
 221         .section ".kprobes.text","a"; \
 222         .align 2 ; \
 223         .type name,@function; \
 224         .globl name; \
 225 name:
 226
 227 #define DOTSYM(a)       a
 228
 229 #else
 230
 231 #define XGLUE(a,b) a##b
 232 #define GLUE(a,b) XGLUE(a,b)
 233
 234 #define _GLOBAL(name) \
 235         .section ".text"; \
 236         .align 2 ; \
 237         .globl name; \
 238         .globl GLUE(.,name); \
 239         .section ".opd","aw"; \
 240 name: \
 241         .quad GLUE(.,name); \
 242         .quad .TOC.@tocbase; \
 243         .quad 0; \
 244         .previous; \
 245         .type GLUE(.,name),@function; \
 246 GLUE(.,name):
 247
 248 #define _GLOBAL_TOC(name) _GLOBAL(name)
 249
 250 #define _KPROBE(name) \
 251         .section ".kprobes.text","a"; \
 252         .align 2 ; \
 253         .globl name; \
 254         .globl GLUE(.,name); \
 255         .section ".opd","aw"; \
 256 name: \
 257         .quad GLUE(.,name); \
 258         .quad .TOC.@tocbase; \
 259         .quad 0; \
 260         .previous; \
 261         .type GLUE(.,name),@function; \
 262 GLUE(.,name):
 263
 264 #define DOTSYM(a)       GLUE(.,a)
 265
 266 #endif
 267
 268 #else /* 32-bit */
 269
 270 #define _ENTRY(n)       \
 271         .globl n;       \
 272 n:
 273
 274 #define _GLOBAL(n)      \
 275         .text;          \
 276         .stabs __stringify(n:F-1),N_FUN,0,0,n;\
 277         .globl n;       \
 278 n:
 279
 280 #define _GLOBAL_TOC(name) _GLOBAL(name)
 281
 282 #define _KPROBE(n)      \
 283         .section ".kprobes.text","a";   \
 284         .globl  n;      \
 285 n:
 286
 287 #endif
 288
 289 /*
 290  * LOAD_REG_IMMEDIATE(rn, expr)
 291  *   Loads the value of the constant expression 'expr' into register 'rn'
 292  *   using immediate instructions only.  Use this when it's important not
 293  *   to reference other data (i.e. on ppc64 when the TOC pointer is not
 294  *   valid) and when 'expr' is a constant or absolute address.
 295  *
 296  * LOAD_REG_ADDR(rn, name)
 297  *   Loads the address of label 'name' into register 'rn'.  Use this when
 298  *   you don't particularly need immediate instructions only, but you need
 299  *   the whole address in one register (e.g. it's a structure address and
 300  *   you want to access various offsets within it).  On ppc32 this is
 301  *   identical to LOAD_REG_IMMEDIATE.
 302  *
 303  * LOAD_REG_ADDR_PIC(rn, name)
 304  *   Loads the address of label 'name' into register 'run'. Use this when
 305  *   the kernel doesn't run at the linked or relocated address. Please
 306  *   note that this macro will clobber the lr register.
 307  *
 308  * LOAD_REG_ADDRBASE(rn, name)
 309  * ADDROFF(name)
 310  *   LOAD_REG_ADDRBASE loads part of the address of label 'name' into
 311  *   register 'rn'.  ADDROFF(name) returns the remainder of the address as
 312  *   a constant expression.  ADDROFF(name) is a signed expression < 16 bits
 313  *   in size, so is suitable for use directly as an offset in load and store
 314  *   instructions.  Use this when loading/storing a single word or less as:
 315  *      LOAD_REG_ADDRBASE(rX, name)
 316  *      ld      rY,ADDROFF(name)(rX)
 317  */
 318
 319 /* Be careful, this will clobber the lr register. */
 320 #define LOAD_REG_ADDR_PIC(reg, name)            \
 321         bl      0f;                             \
 322 0:      mflr    reg;                            \
 323         addis   reg,reg,(name - 0b)@ha;         \
 324         addi    reg,reg,(name - 0b)@l;
 325
 326 #ifdef __powerpc64__
 327 #ifdef HAVE_AS_ATHIGH
 328 #define __AS_ATHIGH high
 329 #else
 330 #define __AS_ATHIGH h
 331 #endif
 332 #define LOAD_REG_IMMEDIATE(reg,expr)            \
 333         lis     reg,(expr)@highest;             \
 334         ori     reg,reg,(expr)@higher;  \
 335         rldicr  reg,reg,32,31;          \
 336         oris    reg,reg,(expr)@__AS_ATHIGH;     \
 337         ori     reg,reg,(expr)@l;
 338
 339 #define LOAD_REG_ADDR(reg,name)                 \
 340         ld      reg,name@got(r2)
 341
 342 #define LOAD_REG_ADDRBASE(reg,name)     LOAD_REG_ADDR(reg,name)
 343 #define ADDROFF(name)                   0
 344
 345 /* offsets for stack frame layout */
 346 #define LRSAVE  16
 347
 348 #else /* 32-bit */
 349
 350 #define LOAD_REG_IMMEDIATE(reg,expr)            \
 351         lis     reg,(expr)@ha;          \
 352         addi    reg,reg,(expr)@l;
 353
 354 #define LOAD_REG_ADDR(reg,name)         LOAD_REG_IMMEDIATE(reg, name)
 355
 356 #define LOAD_REG_ADDRBASE(reg, name)    lis     reg,name@ha
 357 #define ADDROFF(name)                   name@l
 358
 359 /* offsets for stack frame layout */
 360 #define LRSAVE  4
 361
 362 #endif
 363
 364 /* various errata or part fixups */
 365 #ifdef CONFIG_PPC601_SYNC_FIX
 366 #define SYNC                            \
 367 BEGIN_FTR_SECTION                       \
 368         sync;                           \
 369         isync;                          \
 370 END_FTR_SECTION_IFSET(CPU_FTR_601)
 371 #define SYNC_601                        \
 372 BEGIN_FTR_SECTION                       \
 373         sync;                           \
 374 END_FTR_SECTION_IFSET(CPU_FTR_601)
 375 #define ISYNC_601                       \
 376 BEGIN_FTR_SECTION                       \
 377         isync;                          \
 378 END_FTR_SECTION_IFSET(CPU_FTR_601)
 379 #else
 380 #define SYNC
 381 #define SYNC_601
 382 #define ISYNC_601
 383 #endif
 384
 385 #if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
 386 #define MFTB(dest)                      \
 387 90:     mfspr dest, SPRN_TBRL;          \
 388 BEGIN_FTR_SECTION_NESTED(96);           \
 389         cmpwi dest,0;                   \
 390         beq-  90b;                      \
 391 END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
 392 #elif defined(CONFIG_8xx)
 393 #define MFTB(dest)                      mftb dest
 394 #else
 395 #define MFTB(dest)                      mfspr dest, SPRN_TBRL
 396 #endif
 397
 398 #ifndef CONFIG_SMP
 399 #define TLBSYNC
 400 #else /* CONFIG_SMP */
 401 /* tlbsync is not implemented on 601 */
 402 #define TLBSYNC                         \
 403 BEGIN_FTR_SECTION                       \
 404         tlbsync;                        \
 405         sync;                           \
 406 END_FTR_SECTION_IFCLR(CPU_FTR_601)
 407 #endif
 408
 409 #ifdef CONFIG_PPC64
 410 #define MTOCRF(FXM, RS)                 \
 411         BEGIN_FTR_SECTION_NESTED(848);  \
 412         mtcrf   (FXM), RS;              \
 413         FTR_SECTION_ELSE_NESTED(848);   \
 414         mtocrf (FXM), RS;               \
 415         ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_NOEXECUTE, 848)
 416 #endif
 417
 418 /*
 419  * This instruction is not implemented on the PPC 603 or 601; however, on
 420  * the 403GCX and 405GP tlbia IS defined and tlbie is not.
 421  * All of these instructions exist in the 8xx, they have magical powers,
 422  * and they must be used.
 423  */
 424
 425 #if !defined(CONFIG_4xx) && !defined(CONFIG_8xx)
 426 #define tlbia                                   \
 427         li      r4,1024;                        \
 428         mtctr   r4;                             \
 429         lis     r4,KERNELBASE@h;                \
 430 0:      tlbie   r4;                             \
 431         addi    r4,r4,0x1000;                   \
 432         bdnz    0b
 433 #endif
 434
 435
 436 #ifdef CONFIG_IBM440EP_ERR42
 437 #define PPC440EP_ERR42 isync
 438 #else
 439 #define PPC440EP_ERR42
 440 #endif
 441
 442 /* The following stops all load and store data streams associated with stream
 443  * ID (ie. streams created explicitly).  The embedded and server mnemonics for
 444  * dcbt are different so we use machine "power4" here explicitly.
 445  */
 446 #define DCBT_STOP_ALL_STREAM_IDS(scratch)       \
 447 .machine push ;                                 \
 448 .machine "power4" ;                             \
 449        lis     scratch,0x60000000@h;            \
 450        dcbt    r0,scratch,0b01010;              \
 451 .machine pop
 452
 453 /*
 454  * toreal/fromreal/tophys/tovirt macros. 32-bit BookE makes them
 455  * keep the address intact to be compatible with code shared with
 456  * 32-bit classic.
 457  *
 458  * On the other hand, I find it useful to have them behave as expected
 459  * by their name (ie always do the addition) on 64-bit BookE
 460  */
 461 #if defined(CONFIG_BOOKE) && !defined(CONFIG_PPC64)
 462 #define toreal(rd)
 463 #define fromreal(rd)
 464
 465 /*
 466  * We use addis to ensure compatibility with the "classic" ppc versions of
 467  * these macros, which use rs = 0 to get the tophys offset in rd, rather than
 468  * converting the address in r0, and so this version has to do that too
 469  * (i.e. set register rd to 0 when rs == 0).
 470  */
 471 #define tophys(rd,rs)                           \
 472         addis   rd,rs,0
 473
 474 #define tovirt(rd,rs)                           \
 475         addis   rd,rs,0
 476
 477 #elif defined(CONFIG_PPC64)
 478 #define toreal(rd)              /* we can access c000... in real mode */
 479 #define fromreal(rd)
 480
 481 #define tophys(rd,rs)                           \
 482         clrldi  rd,rs,2
 483
 484 #define tovirt(rd,rs)                           \
 485         rotldi  rd,rs,16;                       \
 486         ori     rd,rd,((KERNELBASE>>48)&0xFFFF);\
 487         rotldi  rd,rd,48
 488 #else
 489 /*
 490  * On APUS (Amiga PowerPC cpu upgrade board), we don't know the
 491  * physical base address of RAM at compile time.
 492  */
 493 #define toreal(rd)      tophys(rd,rd)
 494 #define fromreal(rd)    tovirt(rd,rd)
 495
 496 #define tophys(rd,rs)                           \
 497 0:      addis   rd,rs,-PAGE_OFFSET@h;           \
 498         .section ".vtop_fixup","aw";            \
 499         .align  1;                              \
 500         .long   0b;                             \
 501         .previous
 502
 503 #define tovirt(rd,rs)                           \
 504 0:      addis   rd,rs,PAGE_OFFSET@h;            \
 505         .section ".ptov_fixup","aw";            \
 506         .align  1;                              \
 507         .long   0b;                             \
 508         .previous
 509 #endif
 510
 511 #ifdef CONFIG_PPC_BOOK3S_64
 512 #define RFI             rfid
 513 #define MTMSRD(r)       mtmsrd  r
 514 #define MTMSR_EERI(reg) mtmsrd  reg,1
 515 #else
 516 #define FIX_SRR1(ra, rb)
 517 #ifndef CONFIG_40x
 518 #define RFI             rfi
 519 #else
 520 #define RFI             rfi; b .        /* Prevent prefetch past rfi */
 521 #endif
 522 #define MTMSRD(r)       mtmsr   r
 523 #define MTMSR_EERI(reg) mtmsr   reg
 524 #define CLR_TOP32(r)
 525 #endif
 526
 527 #endif /* __KERNEL__ */
 528
 529 /* The boring bits... */
 530
 531 /* Condition Register Bit Fields */
 532
 533 #define cr0     0
 534 #define cr1     1
 535 #define cr2     2
 536 #define cr3     3
 537 #define cr4     4
 538 #define cr5     5
 539 #define cr6     6
 540 #define cr7     7
 541
 542
 543 /*
 544  * General Purpose Registers (GPRs)
 545  *
 546  * The lower case r0-r31 should be used in preference to the upper
 547  * case R0-R31 as they provide more error checking in the assembler.
 548  * Use R0-31 only when really nessesary.
 549  */
 550
 551 #define r0      %r0
 552 #define r1      %r1
 553 #define r2      %r2
 554 #define r3      %r3
 555 #define r4      %r4
 556 #define r5      %r5
 557 #define r6      %r6
 558 #define r7      %r7
 559 #define r8      %r8
 560 #define r9      %r9
 561 #define r10     %r10
 562 #define r11     %r11
 563 #define r12     %r12
 564 #define r13     %r13
 565 #define r14     %r14
 566 #define r15     %r15
 567 #define r16     %r16
 568 #define r17     %r17
 569 #define r18     %r18
 570 #define r19     %r19
 571 #define r20     %r20
 572 #define r21     %r21
 573 #define r22     %r22
 574 #define r23     %r23
 575 #define r24     %r24
 576 #define r25     %r25
 577 #define r26     %r26
 578 #define r27     %r27
 579 #define r28     %r28
 580 #define r29     %r29
 581 #define r30     %r30
 582 #define r31     %r31
 583
 584
 585 /* Floating Point Registers (FPRs) */
 586
 587 #define fr0     0
 588 #define fr1     1
 589 #define fr2     2
 590 #define fr3     3
 591 #define fr4     4
 592 #define fr5     5
 593 #define fr6     6
 594 #define fr7     7
 595 #define fr8     8
 596 #define fr9     9
 597 #define fr10    10
 598 #define fr11    11
 599 #define fr12    12
 600 #define fr13    13
 601 #define fr14    14
 602 #define fr15    15
 603 #define fr16    16
 604 #define fr17    17
 605 #define fr18    18
 606 #define fr19    19
 607 #define fr20    20
 608 #define fr21    21
 609 #define fr22    22
 610 #define fr23    23
 611 #define fr24    24
 612 #define fr25    25
 613 #define fr26    26
 614 #define fr27    27
 615 #define fr28    28
 616 #define fr29    29
 617 #define fr30    30
 618 #define fr31    31
 619
 620 /* AltiVec Registers (VPRs) */
 621
 622 #define v0      0
 623 #define v1      1
 624 #define v2      2
 625 #define v3      3
 626 #define v4      4
 627 #define v5      5
 628 #define v6      6
 629 #define v7      7
 630 #define v8      8
 631 #define v9      9
 632 #define v10     10
 633 #define v11     11
 634 #define v12     12
 635 #define v13     13
 636 #define v14     14
 637 #define v15     15
 638 #define v16     16
 639 #define v17     17
 640 #define v18     18
 641 #define v19     19
 642 #define v20     20
 643 #define v21     21
 644 #define v22     22
 645 #define v23     23
 646 #define v24     24
 647 #define v25     25
 648 #define v26     26
 649 #define v27     27
 650 #define v28     28
 651 #define v29     29
 652 #define v30     30
 653 #define v31     31
 654
 655 /* VSX Registers (VSRs) */
 656
 657 #define vs0     0
 658 #define vs1     1
 659 #define vs2     2
 660 #define vs3     3
 661 #define vs4     4
 662 #define vs5     5
 663 #define vs6     6
 664 #define vs7     7
 665 #define vs8     8
 666 #define vs9     9
 667 #define vs10    10
 668 #define vs11    11
 669 #define vs12    12
 670 #define vs13    13
 671 #define vs14    14
 672 #define vs15    15
 673 #define vs16    16
 674 #define vs17    17
 675 #define vs18    18
 676 #define vs19    19
 677 #define vs20    20
 678 #define vs21    21
 679 #define vs22    22
 680 #define vs23    23
 681 #define vs24    24
 682 #define vs25    25
 683 #define vs26    26
 684 #define vs27    27
 685 #define vs28    28
 686 #define vs29    29
 687 #define vs30    30
 688 #define vs31    31
 689 #define vs32    32
 690 #define vs33    33
 691 #define vs34    34
 692 #define vs35    35
 693 #define vs36    36
 694 #define vs37    37
 695 #define vs38    38
 696 #define vs39    39
 697 #define vs40    40
 698 #define vs41    41
 699 #define vs42    42
 700 #define vs43    43
 701 #define vs44    44
 702 #define vs45    45
 703 #define vs46    46
 704 #define vs47    47
 705 #define vs48    48
 706 #define vs49    49
 707 #define vs50    50
 708 #define vs51    51
 709 #define vs52    52
 710 #define vs53    53
 711 #define vs54    54
 712 #define vs55    55
 713 #define vs56    56
 714 #define vs57    57
 715 #define vs58    58
 716 #define vs59    59
 717 #define vs60    60
 718 #define vs61    61
 719 #define vs62    62
 720 #define vs63    63
 721
 722 /* SPE Registers (EVPRs) */
 723
 724 #define evr0    0
 725 #define evr1    1
 726 #define evr2    2
 727 #define evr3    3
 728 #define evr4    4
 729 #define evr5    5
 730 #define evr6    6
 731 #define evr7    7
 732 #define evr8    8
 733 #define evr9    9
 734 #define evr10   10
 735 #define evr11   11
 736 #define evr12   12
 737 #define evr13   13
 738 #define evr14   14
 739 #define evr15   15
 740 #define evr16   16
 741 #define evr17   17
 742 #define evr18   18
 743 #define evr19   19
 744 #define evr20   20
 745 #define evr21   21
 746 #define evr22   22
 747 #define evr23   23
 748 #define evr24   24
 749 #define evr25   25
 750 #define evr26   26
 751 #define evr27   27
 752 #define evr28   28
 753 #define evr29   29
 754 #define evr30   30
 755 #define evr31   31
 756
 757 /* some stab codes */
 758 #define N_FUN   36
 759 #define N_RSYM  64
 760 #define N_SLINE 68
 761 #define N_SO    100
 762
 763 /*
 764  * Create an endian fixup trampoline
 765  *
 766  * This starts with a "tdi 0,0,0x48" instruction which is
 767  * essentially a "trap never", and thus akin to a nop.
 768  *
 769  * The opcode for this instruction read with the wrong endian
 770  * however results in a b . + 8
 771  *
 772  * So essentially we use that trick to execute the following
 773  * trampoline in "reverse endian" if we are running with the
 774  * MSR_LE bit set the "wrong" way for whatever endianness the
 775  * kernel is built for.
 776  */
 777
 778 #ifdef CONFIG_PPC_BOOK3E
 779 #define FIXUP_ENDIAN
 780 #else
 781 #define FIXUP_ENDIAN                                               \
 782         tdi   0,0,0x48;   /* Reverse endian of b . + 8          */ \
 783         b     $+36;       /* Skip trampoline if endian is good  */ \
 784         .long 0x05009f42; /* bcl 20,31,$+4                      */ \
 785         .long 0xa602487d; /* mflr r10                           */ \
 786         .long 0x1c004a39; /* addi r10,r10,28                    */ \
 787         .long 0xa600607d; /* mfmsr r11                          */ \
 788         .long 0x01006b69; /* xori r11,r11,1                     */ \
 789         .long 0xa6035a7d; /* mtsrr0 r10                         */ \
 790         .long 0xa6037b7d; /* mtsrr1 r11                         */ \
 791         .long 0x2400004c  /* rfid                               */
 792 #endif /* !CONFIG_PPC_BOOK3E */
 793 #endif /*  __ASSEMBLY__ */
 794 #endif /* _ASM_POWERPC_PPC_ASM_H */