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 #include <asm/feature-fixups.h> 13 14 #ifdef __ASSEMBLY__ 15 16 #define SZL (BITS_PER_LONG/8) 17 18 /* 19 * Stuff for accurate CPU time accounting. 20 * These macros handle transitions between user and system state 21 * in exception entry and exit and accumulate time to the 22 * user_time and system_time fields in the paca. 23 */ 24 25 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 26 #define ACCOUNT_CPU_USER_ENTRY(ptr, ra, rb) 27 #define ACCOUNT_CPU_USER_EXIT(ptr, ra, rb) 28 #define ACCOUNT_STOLEN_TIME 29 #else 30 #define ACCOUNT_CPU_USER_ENTRY(ptr, ra, rb) \ 31 MFTB(ra); /* get timebase */ \ 32 PPC_LL rb, ACCOUNT_STARTTIME_USER(ptr); \ 33 PPC_STL ra, ACCOUNT_STARTTIME(ptr); \ 34 subf rb,rb,ra; /* subtract start value */ \ 35 PPC_LL ra, ACCOUNT_USER_TIME(ptr); \ 36 add ra,ra,rb; /* add on to user time */ \ 37 PPC_STL ra, ACCOUNT_USER_TIME(ptr); \ 38 39 #define ACCOUNT_CPU_USER_EXIT(ptr, ra, rb) \ 40 MFTB(ra); /* get timebase */ \ 41 PPC_LL rb, ACCOUNT_STARTTIME(ptr); \ 42 PPC_STL ra, ACCOUNT_STARTTIME_USER(ptr); \ 43 subf rb,rb,ra; /* subtract start value */ \ 44 PPC_LL ra, ACCOUNT_SYSTEM_TIME(ptr); \ 45 add ra,ra,rb; /* add on to system time */ \ 46 PPC_STL ra, ACCOUNT_SYSTEM_TIME(ptr) 47 48 #ifdef CONFIG_PPC_SPLPAR 49 #define ACCOUNT_STOLEN_TIME \ 50 BEGIN_FW_FTR_SECTION; \ 51 beq 33f; \ 52 /* from user - see if there are any DTL entries to process */ \ 53 ld r10,PACALPPACAPTR(r13); /* get ptr to VPA */ \ 54 ld r11,PACA_DTL_RIDX(r13); /* get log read index */ \ 55 addi r10,r10,LPPACA_DTLIDX; \ 56 LDX_BE r10,0,r10; /* get log write index */ \ 57 cmpd cr1,r11,r10; \ 58 beq+ cr1,33f; \ 59 bl accumulate_stolen_time; \ 60 ld r12,_MSR(r1); \ 61 andi. r10,r12,MSR_PR; /* Restore cr0 (coming from user) */ \ 62 33: \ 63 END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR) 64 65 #else /* CONFIG_PPC_SPLPAR */ 66 #define ACCOUNT_STOLEN_TIME 67 68 #endif /* CONFIG_PPC_SPLPAR */ 69 70 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 71 72 /* 73 * Macros for storing registers into and loading registers from 74 * exception frames. 75 */ 76 #ifdef __powerpc64__ 77 #define SAVE_GPR(n, base) std n,GPR0+8*(n)(base) 78 #define REST_GPR(n, base) ld n,GPR0+8*(n)(base) 79 #define SAVE_NVGPRS(base) SAVE_8GPRS(14, base); SAVE_10GPRS(22, base) 80 #define REST_NVGPRS(base) REST_8GPRS(14, base); REST_10GPRS(22, base) 81 #else 82 #define SAVE_GPR(n, base) stw n,GPR0+4*(n)(base) 83 #define REST_GPR(n, base) lwz n,GPR0+4*(n)(base) 84 #define SAVE_NVGPRS(base) stmw 13, GPR0+4*13(base) 85 #define REST_NVGPRS(base) lmw 13, GPR0+4*13(base) 86 #endif 87 88 #define SAVE_2GPRS(n, base) SAVE_GPR(n, base); SAVE_GPR(n+1, base) 89 #define SAVE_4GPRS(n, base) SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base) 90 #define SAVE_8GPRS(n, base) SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base) 91 #define SAVE_10GPRS(n, base) SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base) 92 #define REST_2GPRS(n, base) REST_GPR(n, base); REST_GPR(n+1, base) 93 #define REST_4GPRS(n, base) REST_2GPRS(n, base); REST_2GPRS(n+2, base) 94 #define REST_8GPRS(n, base) REST_4GPRS(n, base); REST_4GPRS(n+4, base) 95 #define REST_10GPRS(n, base) REST_8GPRS(n, base); REST_2GPRS(n+8, base) 96 97 #define SAVE_FPR(n, base) stfd n,8*TS_FPRWIDTH*(n)(base) 98 #define SAVE_2FPRS(n, base) SAVE_FPR(n, base); SAVE_FPR(n+1, base) 99 #define SAVE_4FPRS(n, base) SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base) 100 #define SAVE_8FPRS(n, base) SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base) 101 #define SAVE_16FPRS(n, base) SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base) 102 #define SAVE_32FPRS(n, base) SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base) 103 #define REST_FPR(n, base) lfd n,8*TS_FPRWIDTH*(n)(base) 104 #define REST_2FPRS(n, base) REST_FPR(n, base); REST_FPR(n+1, base) 105 #define REST_4FPRS(n, base) REST_2FPRS(n, base); REST_2FPRS(n+2, base) 106 #define REST_8FPRS(n, base) REST_4FPRS(n, base); REST_4FPRS(n+4, base) 107 #define REST_16FPRS(n, base) REST_8FPRS(n, base); REST_8FPRS(n+8, base) 108 #define REST_32FPRS(n, base) REST_16FPRS(n, base); REST_16FPRS(n+16, base) 109 110 #define SAVE_VR(n,b,base) li b,16*(n); stvx n,base,b 111 #define SAVE_2VRS(n,b,base) SAVE_VR(n,b,base); SAVE_VR(n+1,b,base) 112 #define SAVE_4VRS(n,b,base) SAVE_2VRS(n,b,base); SAVE_2VRS(n+2,b,base) 113 #define SAVE_8VRS(n,b,base) SAVE_4VRS(n,b,base); SAVE_4VRS(n+4,b,base) 114 #define SAVE_16VRS(n,b,base) SAVE_8VRS(n,b,base); SAVE_8VRS(n+8,b,base) 115 #define SAVE_32VRS(n,b,base) SAVE_16VRS(n,b,base); SAVE_16VRS(n+16,b,base) 116 #define REST_VR(n,b,base) li b,16*(n); lvx n,base,b 117 #define REST_2VRS(n,b,base) REST_VR(n,b,base); REST_VR(n+1,b,base) 118 #define REST_4VRS(n,b,base) REST_2VRS(n,b,base); REST_2VRS(n+2,b,base) 119 #define REST_8VRS(n,b,base) REST_4VRS(n,b,base); REST_4VRS(n+4,b,base) 120 #define REST_16VRS(n,b,base) REST_8VRS(n,b,base); REST_8VRS(n+8,b,base) 121 #define REST_32VRS(n,b,base) REST_16VRS(n,b,base); REST_16VRS(n+16,b,base) 122 123 #ifdef __BIG_ENDIAN__ 124 #define STXVD2X_ROT(n,b,base) STXVD2X(n,b,base) 125 #define LXVD2X_ROT(n,b,base) LXVD2X(n,b,base) 126 #else 127 #define STXVD2X_ROT(n,b,base) XXSWAPD(n,n); \ 128 STXVD2X(n,b,base); \ 129 XXSWAPD(n,n) 130 131 #define LXVD2X_ROT(n,b,base) LXVD2X(n,b,base); \ 132 XXSWAPD(n,n) 133 #endif 134 /* Save the lower 32 VSRs in the thread VSR region */ 135 #define SAVE_VSR(n,b,base) li b,16*(n); STXVD2X_ROT(n,R##base,R##b) 136 #define SAVE_2VSRS(n,b,base) SAVE_VSR(n,b,base); SAVE_VSR(n+1,b,base) 137 #define SAVE_4VSRS(n,b,base) SAVE_2VSRS(n,b,base); SAVE_2VSRS(n+2,b,base) 138 #define SAVE_8VSRS(n,b,base) SAVE_4VSRS(n,b,base); SAVE_4VSRS(n+4,b,base) 139 #define SAVE_16VSRS(n,b,base) SAVE_8VSRS(n,b,base); SAVE_8VSRS(n+8,b,base) 140 #define SAVE_32VSRS(n,b,base) SAVE_16VSRS(n,b,base); SAVE_16VSRS(n+16,b,base) 141 #define REST_VSR(n,b,base) li b,16*(n); LXVD2X_ROT(n,R##base,R##b) 142 #define REST_2VSRS(n,b,base) REST_VSR(n,b,base); REST_VSR(n+1,b,base) 143 #define REST_4VSRS(n,b,base) REST_2VSRS(n,b,base); REST_2VSRS(n+2,b,base) 144 #define REST_8VSRS(n,b,base) REST_4VSRS(n,b,base); REST_4VSRS(n+4,b,base) 145 #define REST_16VSRS(n,b,base) REST_8VSRS(n,b,base); REST_8VSRS(n+8,b,base) 146 #define REST_32VSRS(n,b,base) REST_16VSRS(n,b,base); REST_16VSRS(n+16,b,base) 147 148 /* 149 * b = base register for addressing, o = base offset from register of 1st EVR 150 * n = first EVR, s = scratch 151 */ 152 #define SAVE_EVR(n,s,b,o) evmergehi s,s,n; stw s,o+4*(n)(b) 153 #define SAVE_2EVRS(n,s,b,o) SAVE_EVR(n,s,b,o); SAVE_EVR(n+1,s,b,o) 154 #define SAVE_4EVRS(n,s,b,o) SAVE_2EVRS(n,s,b,o); SAVE_2EVRS(n+2,s,b,o) 155 #define SAVE_8EVRS(n,s,b,o) SAVE_4EVRS(n,s,b,o); SAVE_4EVRS(n+4,s,b,o) 156 #define SAVE_16EVRS(n,s,b,o) SAVE_8EVRS(n,s,b,o); SAVE_8EVRS(n+8,s,b,o) 157 #define SAVE_32EVRS(n,s,b,o) SAVE_16EVRS(n,s,b,o); SAVE_16EVRS(n+16,s,b,o) 158 #define REST_EVR(n,s,b,o) lwz s,o+4*(n)(b); evmergelo n,s,n 159 #define REST_2EVRS(n,s,b,o) REST_EVR(n,s,b,o); REST_EVR(n+1,s,b,o) 160 #define REST_4EVRS(n,s,b,o) REST_2EVRS(n,s,b,o); REST_2EVRS(n+2,s,b,o) 161 #define REST_8EVRS(n,s,b,o) REST_4EVRS(n,s,b,o); REST_4EVRS(n+4,s,b,o) 162 #define REST_16EVRS(n,s,b,o) REST_8EVRS(n,s,b,o); REST_8EVRS(n+8,s,b,o) 163 #define REST_32EVRS(n,s,b,o) REST_16EVRS(n,s,b,o); REST_16EVRS(n+16,s,b,o) 164 165 /* Macros to adjust thread priority for hardware multithreading */ 166 #define HMT_VERY_LOW or 31,31,31 # very low priority 167 #define HMT_LOW or 1,1,1 168 #define HMT_MEDIUM_LOW or 6,6,6 # medium low priority 169 #define HMT_MEDIUM or 2,2,2 170 #define HMT_MEDIUM_HIGH or 5,5,5 # medium high priority 171 #define HMT_HIGH or 3,3,3 172 #define HMT_EXTRA_HIGH or 7,7,7 # power7 only 173 174 #ifdef CONFIG_PPC64 175 #define ULONG_SIZE 8 176 #else 177 #define ULONG_SIZE 4 178 #endif 179 #define __VCPU_GPR(n) (VCPU_GPRS + (n * ULONG_SIZE)) 180 #define VCPU_GPR(n) __VCPU_GPR(__REG_##n) 181 182 #ifdef __KERNEL__ 183 #ifdef CONFIG_PPC64 184 185 #define STACKFRAMESIZE 256 186 #define __STK_REG(i) (112 + ((i)-14)*8) 187 #define STK_REG(i) __STK_REG(__REG_##i) 188 189 #ifdef PPC64_ELF_ABI_v2 190 #define STK_GOT 24 191 #define __STK_PARAM(i) (32 + ((i)-3)*8) 192 #else 193 #define STK_GOT 40 194 #define __STK_PARAM(i) (48 + ((i)-3)*8) 195 #endif 196 #define STK_PARAM(i) __STK_PARAM(__REG_##i) 197 198 #ifdef PPC64_ELF_ABI_v2 199 200 #define _GLOBAL(name) \ 201 .align 2 ; \ 202 .type name,@function; \ 203 .globl name; \ 204 name: 205 206 #define _GLOBAL_TOC(name) \ 207 .align 2 ; \ 208 .type name,@function; \ 209 .globl name; \ 210 name: \ 211 0: addis r2,r12,(.TOC.-0b)@ha; \ 212 addi r2,r2,(.TOC.-0b)@l; \ 213 .localentry name,.-name 214 215 #define DOTSYM(a) a 216 217 #else 218 219 #define XGLUE(a,b) a##b 220 #define GLUE(a,b) XGLUE(a,b) 221 222 #define _GLOBAL(name) \ 223 .align 2 ; \ 224 .globl name; \ 225 .globl GLUE(.,name); \ 226 .pushsection ".opd","aw"; \ 227 name: \ 228 .quad GLUE(.,name); \ 229 .quad .TOC.@tocbase; \ 230 .quad 0; \ 231 .popsection; \ 232 .type GLUE(.,name),@function; \ 233 GLUE(.,name): 234 235 #define _GLOBAL_TOC(name) _GLOBAL(name) 236 237 #define DOTSYM(a) GLUE(.,a) 238 239 #endif 240 241 #else /* 32-bit */ 242 243 #define _ENTRY(n) \ 244 .globl n; \ 245 n: 246 247 #define _GLOBAL(n) \ 248 .stabs __stringify(n:F-1),N_FUN,0,0,n;\ 249 .globl n; \ 250 n: 251 252 #define _GLOBAL_TOC(name) _GLOBAL(name) 253 254 #endif 255 256 /* 257 * __kprobes (the C annotation) puts the symbol into the .kprobes.text 258 * section, which gets emitted at the end of regular text. 259 * 260 * _ASM_NOKPROBE_SYMBOL and NOKPROBE_SYMBOL just adds the symbol to 261 * a blacklist. The former is for core kprobe functions/data, the 262 * latter is for those that incdentially must be excluded from probing 263 * and allows them to be linked at more optimal location within text. 264 */ 265 #ifdef CONFIG_KPROBES 266 #define _ASM_NOKPROBE_SYMBOL(entry) \ 267 .pushsection "_kprobe_blacklist","aw"; \ 268 PPC_LONG (entry) ; \ 269 .popsection 270 #else 271 #define _ASM_NOKPROBE_SYMBOL(entry) 272 #endif 273 274 #define FUNC_START(name) _GLOBAL(name) 275 #define FUNC_END(name) 276 277 /* 278 * LOAD_REG_IMMEDIATE(rn, expr) 279 * Loads the value of the constant expression 'expr' into register 'rn' 280 * using immediate instructions only. Use this when it's important not 281 * to reference other data (i.e. on ppc64 when the TOC pointer is not 282 * valid) and when 'expr' is a constant or absolute address. 283 * 284 * LOAD_REG_ADDR(rn, name) 285 * Loads the address of label 'name' into register 'rn'. Use this when 286 * you don't particularly need immediate instructions only, but you need 287 * the whole address in one register (e.g. it's a structure address and 288 * you want to access various offsets within it). On ppc32 this is 289 * identical to LOAD_REG_IMMEDIATE. 290 * 291 * LOAD_REG_ADDR_PIC(rn, name) 292 * Loads the address of label 'name' into register 'run'. Use this when 293 * the kernel doesn't run at the linked or relocated address. Please 294 * note that this macro will clobber the lr register. 295 * 296 * LOAD_REG_ADDRBASE(rn, name) 297 * ADDROFF(name) 298 * LOAD_REG_ADDRBASE loads part of the address of label 'name' into 299 * register 'rn'. ADDROFF(name) returns the remainder of the address as 300 * a constant expression. ADDROFF(name) is a signed expression < 16 bits 301 * in size, so is suitable for use directly as an offset in load and store 302 * instructions. Use this when loading/storing a single word or less as: 303 * LOAD_REG_ADDRBASE(rX, name) 304 * ld rY,ADDROFF(name)(rX) 305 */ 306 307 /* Be careful, this will clobber the lr register. */ 308 #define LOAD_REG_ADDR_PIC(reg, name) \ 309 bl 0f; \ 310 0: mflr reg; \ 311 addis reg,reg,(name - 0b)@ha; \ 312 addi reg,reg,(name - 0b)@l; 313 314 #if defined(__powerpc64__) && defined(HAVE_AS_ATHIGH) 315 #define __AS_ATHIGH high 316 #else 317 #define __AS_ATHIGH h 318 #endif 319 320 .macro __LOAD_REG_IMMEDIATE_32 r, x 321 .if (\x) >= 0x8000 || (\x) < -0x8000 322 lis \r, (\x)@__AS_ATHIGH 323 .if (\x) & 0xffff != 0 324 ori \r, \r, (\x)@l 325 .endif 326 .else 327 li \r, (\x)@l 328 .endif 329 .endm 330 331 .macro __LOAD_REG_IMMEDIATE r, x 332 .if (\x) >= 0x80000000 || (\x) < -0x80000000 333 __LOAD_REG_IMMEDIATE_32 \r, (\x) >> 32 334 sldi \r, \r, 32 335 .if (\x) & 0xffff0000 != 0 336 oris \r, \r, (\x)@__AS_ATHIGH 337 .endif 338 .if (\x) & 0xffff != 0 339 ori \r, \r, (\x)@l 340 .endif 341 .else 342 __LOAD_REG_IMMEDIATE_32 \r, \x 343 .endif 344 .endm 345 346 #ifdef __powerpc64__ 347 348 #define LOAD_REG_IMMEDIATE(reg, expr) __LOAD_REG_IMMEDIATE reg, expr 349 350 #define LOAD_REG_IMMEDIATE_SYM(reg, tmp, expr) \ 351 lis tmp, (expr)@highest; \ 352 lis reg, (expr)@__AS_ATHIGH; \ 353 ori tmp, tmp, (expr)@higher; \ 354 ori reg, reg, (expr)@l; \ 355 rldimi reg, tmp, 32, 0 356 357 #define LOAD_REG_ADDR(reg,name) \ 358 ld reg,name@got(r2) 359 360 #define LOAD_REG_ADDRBASE(reg,name) LOAD_REG_ADDR(reg,name) 361 #define ADDROFF(name) 0 362 363 /* offsets for stack frame layout */ 364 #define LRSAVE 16 365 366 #else /* 32-bit */ 367 368 #define LOAD_REG_IMMEDIATE(reg, expr) __LOAD_REG_IMMEDIATE_32 reg, expr 369 370 #define LOAD_REG_IMMEDIATE_SYM(reg,expr) \ 371 lis reg,(expr)@ha; \ 372 addi reg,reg,(expr)@l; 373 374 #define LOAD_REG_ADDR(reg,name) LOAD_REG_IMMEDIATE_SYM(reg, name) 375 376 #define LOAD_REG_ADDRBASE(reg, name) lis reg,name@ha 377 #define ADDROFF(name) name@l 378 379 /* offsets for stack frame layout */ 380 #define LRSAVE 4 381 382 #endif 383 384 /* various errata or part fixups */ 385 #ifdef CONFIG_PPC601_SYNC_FIX 386 #define SYNC sync; isync 387 #define SYNC_601 sync 388 #define ISYNC_601 isync 389 #else 390 #define SYNC 391 #define SYNC_601 392 #define ISYNC_601 393 #endif 394 395 #if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E) 396 #define MFTB(dest) \ 397 90: mfspr dest, SPRN_TBRL; \ 398 BEGIN_FTR_SECTION_NESTED(96); \ 399 cmpwi dest,0; \ 400 beq- 90b; \ 401 END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96) 402 #else 403 #define MFTB(dest) MFTBL(dest) 404 #endif 405 406 #ifdef CONFIG_PPC_8xx 407 #define MFTBL(dest) mftb dest 408 #define MFTBU(dest) mftbu dest 409 #else 410 #define MFTBL(dest) mfspr dest, SPRN_TBRL 411 #define MFTBU(dest) mfspr dest, SPRN_TBRU 412 #endif 413 414 /* tlbsync is not implemented on 601 */ 415 #if !defined(CONFIG_SMP) || defined(CONFIG_PPC_BOOK3S_601) 416 #define TLBSYNC 417 #else 418 #define TLBSYNC tlbsync; sync 419 #endif 420 421 #ifdef CONFIG_PPC64 422 #define MTOCRF(FXM, RS) \ 423 BEGIN_FTR_SECTION_NESTED(848); \ 424 mtcrf (FXM), RS; \ 425 FTR_SECTION_ELSE_NESTED(848); \ 426 mtocrf (FXM), RS; \ 427 ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_NOEXECUTE, 848) 428 #endif 429 430 /* 431 * This instruction is not implemented on the PPC 603 or 601; however, on 432 * the 403GCX and 405GP tlbia IS defined and tlbie is not. 433 * All of these instructions exist in the 8xx, they have magical powers, 434 * and they must be used. 435 */ 436 437 #if !defined(CONFIG_4xx) && !defined(CONFIG_PPC_8xx) 438 #define tlbia \ 439 li r4,1024; \ 440 mtctr r4; \ 441 lis r4,KERNELBASE@h; \ 442 .machine push; \ 443 .machine "power4"; \ 444 0: tlbie r4; \ 445 .machine pop; \ 446 addi r4,r4,0x1000; \ 447 bdnz 0b 448 #endif 449 450 451 #ifdef CONFIG_IBM440EP_ERR42 452 #define PPC440EP_ERR42 isync 453 #else 454 #define PPC440EP_ERR42 455 #endif 456 457 /* The following stops all load and store data streams associated with stream 458 * ID (ie. streams created explicitly). The embedded and server mnemonics for 459 * dcbt are different so this must only be used for server. 460 */ 461 #define DCBT_BOOK3S_STOP_ALL_STREAM_IDS(scratch) \ 462 lis scratch,0x60000000@h; \ 463 dcbt 0,scratch,0b01010 464 465 /* 466 * toreal/fromreal/tophys/tovirt macros. 32-bit BookE makes them 467 * keep the address intact to be compatible with code shared with 468 * 32-bit classic. 469 * 470 * On the other hand, I find it useful to have them behave as expected 471 * by their name (ie always do the addition) on 64-bit BookE 472 */ 473 #if defined(CONFIG_BOOKE) && !defined(CONFIG_PPC64) 474 #define toreal(rd) 475 #define fromreal(rd) 476 477 /* 478 * We use addis to ensure compatibility with the "classic" ppc versions of 479 * these macros, which use rs = 0 to get the tophys offset in rd, rather than 480 * converting the address in r0, and so this version has to do that too 481 * (i.e. set register rd to 0 when rs == 0). 482 */ 483 #define tophys(rd,rs) \ 484 addis rd,rs,0 485 486 #define tovirt(rd,rs) \ 487 addis rd,rs,0 488 489 #elif defined(CONFIG_PPC64) 490 #define toreal(rd) /* we can access c000... in real mode */ 491 #define fromreal(rd) 492 493 #define tophys(rd,rs) \ 494 clrldi rd,rs,2 495 496 #define tovirt(rd,rs) \ 497 rotldi rd,rs,16; \ 498 ori rd,rd,((KERNELBASE>>48)&0xFFFF);\ 499 rotldi rd,rd,48 500 #else 501 #define toreal(rd) tophys(rd,rd) 502 #define fromreal(rd) tovirt(rd,rd) 503 504 #define tophys(rd, rs) addis rd, rs, -PAGE_OFFSET@h 505 #define tovirt(rd, rs) addis rd, rs, PAGE_OFFSET@h 506 #endif 507 508 #ifdef CONFIG_PPC_BOOK3S_64 509 #define RFI rfid 510 #define MTMSRD(r) mtmsrd r 511 #define MTMSR_EERI(reg) mtmsrd reg,1 512 #else 513 #ifndef CONFIG_40x 514 #define RFI rfi 515 #else 516 #define RFI rfi; b . /* Prevent prefetch past rfi */ 517 #endif 518 #define MTMSRD(r) mtmsr r 519 #define MTMSR_EERI(reg) mtmsr reg 520 #endif 521 522 #endif /* __KERNEL__ */ 523 524 /* The boring bits... */ 525 526 /* Condition Register Bit Fields */ 527 528 #define cr0 0 529 #define cr1 1 530 #define cr2 2 531 #define cr3 3 532 #define cr4 4 533 #define cr5 5 534 #define cr6 6 535 #define cr7 7 536 537 538 /* 539 * General Purpose Registers (GPRs) 540 * 541 * The lower case r0-r31 should be used in preference to the upper 542 * case R0-R31 as they provide more error checking in the assembler. 543 * Use R0-31 only when really nessesary. 544 */ 545 546 #define r0 %r0 547 #define r1 %r1 548 #define r2 %r2 549 #define r3 %r3 550 #define r4 %r4 551 #define r5 %r5 552 #define r6 %r6 553 #define r7 %r7 554 #define r8 %r8 555 #define r9 %r9 556 #define r10 %r10 557 #define r11 %r11 558 #define r12 %r12 559 #define r13 %r13 560 #define r14 %r14 561 #define r15 %r15 562 #define r16 %r16 563 #define r17 %r17 564 #define r18 %r18 565 #define r19 %r19 566 #define r20 %r20 567 #define r21 %r21 568 #define r22 %r22 569 #define r23 %r23 570 #define r24 %r24 571 #define r25 %r25 572 #define r26 %r26 573 #define r27 %r27 574 #define r28 %r28 575 #define r29 %r29 576 #define r30 %r30 577 #define r31 %r31 578 579 580 /* Floating Point Registers (FPRs) */ 581 582 #define fr0 0 583 #define fr1 1 584 #define fr2 2 585 #define fr3 3 586 #define fr4 4 587 #define fr5 5 588 #define fr6 6 589 #define fr7 7 590 #define fr8 8 591 #define fr9 9 592 #define fr10 10 593 #define fr11 11 594 #define fr12 12 595 #define fr13 13 596 #define fr14 14 597 #define fr15 15 598 #define fr16 16 599 #define fr17 17 600 #define fr18 18 601 #define fr19 19 602 #define fr20 20 603 #define fr21 21 604 #define fr22 22 605 #define fr23 23 606 #define fr24 24 607 #define fr25 25 608 #define fr26 26 609 #define fr27 27 610 #define fr28 28 611 #define fr29 29 612 #define fr30 30 613 #define fr31 31 614 615 /* AltiVec Registers (VPRs) */ 616 617 #define v0 0 618 #define v1 1 619 #define v2 2 620 #define v3 3 621 #define v4 4 622 #define v5 5 623 #define v6 6 624 #define v7 7 625 #define v8 8 626 #define v9 9 627 #define v10 10 628 #define v11 11 629 #define v12 12 630 #define v13 13 631 #define v14 14 632 #define v15 15 633 #define v16 16 634 #define v17 17 635 #define v18 18 636 #define v19 19 637 #define v20 20 638 #define v21 21 639 #define v22 22 640 #define v23 23 641 #define v24 24 642 #define v25 25 643 #define v26 26 644 #define v27 27 645 #define v28 28 646 #define v29 29 647 #define v30 30 648 #define v31 31 649 650 /* VSX Registers (VSRs) */ 651 652 #define vs0 0 653 #define vs1 1 654 #define vs2 2 655 #define vs3 3 656 #define vs4 4 657 #define vs5 5 658 #define vs6 6 659 #define vs7 7 660 #define vs8 8 661 #define vs9 9 662 #define vs10 10 663 #define vs11 11 664 #define vs12 12 665 #define vs13 13 666 #define vs14 14 667 #define vs15 15 668 #define vs16 16 669 #define vs17 17 670 #define vs18 18 671 #define vs19 19 672 #define vs20 20 673 #define vs21 21 674 #define vs22 22 675 #define vs23 23 676 #define vs24 24 677 #define vs25 25 678 #define vs26 26 679 #define vs27 27 680 #define vs28 28 681 #define vs29 29 682 #define vs30 30 683 #define vs31 31 684 #define vs32 32 685 #define vs33 33 686 #define vs34 34 687 #define vs35 35 688 #define vs36 36 689 #define vs37 37 690 #define vs38 38 691 #define vs39 39 692 #define vs40 40 693 #define vs41 41 694 #define vs42 42 695 #define vs43 43 696 #define vs44 44 697 #define vs45 45 698 #define vs46 46 699 #define vs47 47 700 #define vs48 48 701 #define vs49 49 702 #define vs50 50 703 #define vs51 51 704 #define vs52 52 705 #define vs53 53 706 #define vs54 54 707 #define vs55 55 708 #define vs56 56 709 #define vs57 57 710 #define vs58 58 711 #define vs59 59 712 #define vs60 60 713 #define vs61 61 714 #define vs62 62 715 #define vs63 63 716 717 /* SPE Registers (EVPRs) */ 718 719 #define evr0 0 720 #define evr1 1 721 #define evr2 2 722 #define evr3 3 723 #define evr4 4 724 #define evr5 5 725 #define evr6 6 726 #define evr7 7 727 #define evr8 8 728 #define evr9 9 729 #define evr10 10 730 #define evr11 11 731 #define evr12 12 732 #define evr13 13 733 #define evr14 14 734 #define evr15 15 735 #define evr16 16 736 #define evr17 17 737 #define evr18 18 738 #define evr19 19 739 #define evr20 20 740 #define evr21 21 741 #define evr22 22 742 #define evr23 23 743 #define evr24 24 744 #define evr25 25 745 #define evr26 26 746 #define evr27 27 747 #define evr28 28 748 #define evr29 29 749 #define evr30 30 750 #define evr31 31 751 752 /* some stab codes */ 753 #define N_FUN 36 754 #define N_RSYM 64 755 #define N_SLINE 68 756 #define N_SO 100 757 758 /* 759 * Create an endian fixup trampoline 760 * 761 * This starts with a "tdi 0,0,0x48" instruction which is 762 * essentially a "trap never", and thus akin to a nop. 763 * 764 * The opcode for this instruction read with the wrong endian 765 * however results in a b . + 8 766 * 767 * So essentially we use that trick to execute the following 768 * trampoline in "reverse endian" if we are running with the 769 * MSR_LE bit set the "wrong" way for whatever endianness the 770 * kernel is built for. 771 */ 772 773 #ifdef CONFIG_PPC_BOOK3E 774 #define FIXUP_ENDIAN 775 #else 776 /* 777 * This version may be used in in HV or non-HV context. 778 * MSR[EE] must be disabled. 779 */ 780 #define FIXUP_ENDIAN \ 781 tdi 0,0,0x48; /* Reverse endian of b . + 8 */ \ 782 b 191f; /* Skip trampoline if endian is good */ \ 783 .long 0xa600607d; /* mfmsr r11 */ \ 784 .long 0x01006b69; /* xori r11,r11,1 */ \ 785 .long 0x00004039; /* li r10,0 */ \ 786 .long 0x6401417d; /* mtmsrd r10,1 */ \ 787 .long 0x05009f42; /* bcl 20,31,$+4 */ \ 788 .long 0xa602487d; /* mflr r10 */ \ 789 .long 0x14004a39; /* addi r10,r10,20 */ \ 790 .long 0xa6035a7d; /* mtsrr0 r10 */ \ 791 .long 0xa6037b7d; /* mtsrr1 r11 */ \ 792 .long 0x2400004c; /* rfid */ \ 793 191: 794 795 /* 796 * This version that may only be used with MSR[HV]=1 797 * - Does not clear MSR[RI], so more robust. 798 * - Slightly smaller and faster. 799 */ 800 #define FIXUP_ENDIAN_HV \ 801 tdi 0,0,0x48; /* Reverse endian of b . + 8 */ \ 802 b 191f; /* Skip trampoline if endian is good */ \ 803 .long 0xa600607d; /* mfmsr r11 */ \ 804 .long 0x01006b69; /* xori r11,r11,1 */ \ 805 .long 0x05009f42; /* bcl 20,31,$+4 */ \ 806 .long 0xa602487d; /* mflr r10 */ \ 807 .long 0x14004a39; /* addi r10,r10,20 */ \ 808 .long 0xa64b5a7d; /* mthsrr0 r10 */ \ 809 .long 0xa64b7b7d; /* mthsrr1 r11 */ \ 810 .long 0x2402004c; /* hrfid */ \ 811 191: 812 813 #endif /* !CONFIG_PPC_BOOK3E */ 814 815 #endif /* __ASSEMBLY__ */ 816 817 /* 818 * Helper macro for exception table entries 819 */ 820 #define EX_TABLE(_fault, _target) \ 821 stringify_in_c(.section __ex_table,"a";)\ 822 stringify_in_c(.balign 4;) \ 823 stringify_in_c(.long (_fault) - . ;) \ 824 stringify_in_c(.long (_target) - . ;) \ 825 stringify_in_c(.previous) 826 827 #ifdef CONFIG_PPC_FSL_BOOK3E 828 #define BTB_FLUSH(reg) \ 829 lis reg,BUCSR_INIT@h; \ 830 ori reg,reg,BUCSR_INIT@l; \ 831 mtspr SPRN_BUCSR,reg; \ 832 isync; 833 #else 834 #define BTB_FLUSH(reg) 835 #endif /* CONFIG_PPC_FSL_BOOK3E */ 836 837 #endif /* _ASM_POWERPC_PPC_ASM_H */ 838