1/* 2 * linux/arch/arm/mm/proc-v7.S 3 * 4 * Copyright (C) 2001 Deep Blue Solutions Ltd. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This is the "shell" of the ARMv7 processor support. 11 */ 12#include <linux/init.h> 13#include <linux/linkage.h> 14#include <asm/assembler.h> 15#include <asm/asm-offsets.h> 16#include <asm/hwcap.h> 17#include <asm/pgtable-hwdef.h> 18#include <asm/pgtable.h> 19#include <asm/memory.h> 20 21#include "proc-macros.S" 22 23#ifdef CONFIG_ARM_LPAE 24#include "proc-v7-3level.S" 25#else 26#include "proc-v7-2level.S" 27#endif 28 29ENTRY(cpu_v7_proc_init) 30 ret lr 31ENDPROC(cpu_v7_proc_init) 32 33ENTRY(cpu_v7_proc_fin) 34 mrc p15, 0, r0, c1, c0, 0 @ ctrl register 35 bic r0, r0, #0x1000 @ ...i............ 36 bic r0, r0, #0x0006 @ .............ca. 37 mcr p15, 0, r0, c1, c0, 0 @ disable caches 38 ret lr 39ENDPROC(cpu_v7_proc_fin) 40 41/* 42 * cpu_v7_reset(loc, hyp) 43 * 44 * Perform a soft reset of the system. Put the CPU into the 45 * same state as it would be if it had been reset, and branch 46 * to what would be the reset vector. 47 * 48 * - loc - location to jump to for soft reset 49 * - hyp - indicate if restart occurs in HYP mode 50 * 51 * This code must be executed using a flat identity mapping with 52 * caches disabled. 53 */ 54 .align 5 55 .pushsection .idmap.text, "ax" 56ENTRY(cpu_v7_reset) 57 mrc p15, 0, r2, c1, c0, 0 @ ctrl register 58 bic r2, r2, #0x1 @ ...............m 59 THUMB( bic r2, r2, #1 << 30 ) @ SCTLR.TE (Thumb exceptions) 60 mcr p15, 0, r2, c1, c0, 0 @ disable MMU 61 isb 62#ifdef CONFIG_ARM_VIRT_EXT 63 teq r1, #0 64 bne __hyp_soft_restart 65#endif 66 bx r0 67ENDPROC(cpu_v7_reset) 68 .popsection 69 70/* 71 * cpu_v7_do_idle() 72 * 73 * Idle the processor (eg, wait for interrupt). 74 * 75 * IRQs are already disabled. 76 */ 77ENTRY(cpu_v7_do_idle) 78 dsb @ WFI may enter a low-power mode 79 wfi 80 ret lr 81ENDPROC(cpu_v7_do_idle) 82 83ENTRY(cpu_v7_dcache_clean_area) 84 ALT_SMP(W(nop)) @ MP extensions imply L1 PTW 85 ALT_UP_B(1f) 86 ret lr 871: dcache_line_size r2, r3 882: mcr p15, 0, r0, c7, c10, 1 @ clean D entry 89 add r0, r0, r2 90 subs r1, r1, r2 91 bhi 2b 92 dsb ishst 93 ret lr 94ENDPROC(cpu_v7_dcache_clean_area) 95 96 string cpu_v7_name, "ARMv7 Processor" 97 .align 98 99/* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */ 100.globl cpu_v7_suspend_size 101.equ cpu_v7_suspend_size, 4 * 9 102#ifdef CONFIG_ARM_CPU_SUSPEND 103ENTRY(cpu_v7_do_suspend) 104 stmfd sp!, {r4 - r11, lr} 105 mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID 106 mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID 107 stmia r0!, {r4 - r5} 108#ifdef CONFIG_MMU 109 mrc p15, 0, r6, c3, c0, 0 @ Domain ID 110#ifdef CONFIG_ARM_LPAE 111 mrrc p15, 1, r5, r7, c2 @ TTB 1 112#else 113 mrc p15, 0, r7, c2, c0, 1 @ TTB 1 114#endif 115 mrc p15, 0, r11, c2, c0, 2 @ TTB control register 116#endif 117 mrc p15, 0, r8, c1, c0, 0 @ Control register 118 mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register 119 mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control 120 stmia r0, {r5 - r11} 121 ldmfd sp!, {r4 - r11, pc} 122ENDPROC(cpu_v7_do_suspend) 123 124ENTRY(cpu_v7_do_resume) 125 mov ip, #0 126 mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache 127 mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID 128 ldmia r0!, {r4 - r5} 129 mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID 130 mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID 131 ldmia r0, {r5 - r11} 132#ifdef CONFIG_MMU 133 mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs 134 mcr p15, 0, r6, c3, c0, 0 @ Domain ID 135#ifdef CONFIG_ARM_LPAE 136 mcrr p15, 0, r1, ip, c2 @ TTB 0 137 mcrr p15, 1, r5, r7, c2 @ TTB 1 138#else 139 ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP) 140 ALT_UP(orr r1, r1, #TTB_FLAGS_UP) 141 mcr p15, 0, r1, c2, c0, 0 @ TTB 0 142 mcr p15, 0, r7, c2, c0, 1 @ TTB 1 143#endif 144 mcr p15, 0, r11, c2, c0, 2 @ TTB control register 145 ldr r4, =PRRR @ PRRR 146 ldr r5, =NMRR @ NMRR 147 mcr p15, 0, r4, c10, c2, 0 @ write PRRR 148 mcr p15, 0, r5, c10, c2, 1 @ write NMRR 149#endif /* CONFIG_MMU */ 150 mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register 151 teq r4, r9 @ Is it already set? 152 mcrne p15, 0, r9, c1, c0, 1 @ No, so write it 153 mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control 154 isb 155 dsb 156 mov r0, r8 @ control register 157 b cpu_resume_mmu 158ENDPROC(cpu_v7_do_resume) 159#endif 160 161/* 162 * Cortex-A8 163 */ 164 globl_equ cpu_ca8_proc_init, cpu_v7_proc_init 165 globl_equ cpu_ca8_proc_fin, cpu_v7_proc_fin 166 globl_equ cpu_ca8_reset, cpu_v7_reset 167 globl_equ cpu_ca8_do_idle, cpu_v7_do_idle 168 globl_equ cpu_ca8_dcache_clean_area, cpu_v7_dcache_clean_area 169 globl_equ cpu_ca8_set_pte_ext, cpu_v7_set_pte_ext 170 globl_equ cpu_ca8_suspend_size, cpu_v7_suspend_size 171#ifdef CONFIG_ARM_CPU_SUSPEND 172 globl_equ cpu_ca8_do_suspend, cpu_v7_do_suspend 173 globl_equ cpu_ca8_do_resume, cpu_v7_do_resume 174#endif 175 176/* 177 * Cortex-A9 processor functions 178 */ 179 globl_equ cpu_ca9mp_proc_init, cpu_v7_proc_init 180 globl_equ cpu_ca9mp_proc_fin, cpu_v7_proc_fin 181 globl_equ cpu_ca9mp_reset, cpu_v7_reset 182 globl_equ cpu_ca9mp_do_idle, cpu_v7_do_idle 183 globl_equ cpu_ca9mp_dcache_clean_area, cpu_v7_dcache_clean_area 184 globl_equ cpu_ca9mp_switch_mm, cpu_v7_switch_mm 185 globl_equ cpu_ca9mp_set_pte_ext, cpu_v7_set_pte_ext 186.globl cpu_ca9mp_suspend_size 187.equ cpu_ca9mp_suspend_size, cpu_v7_suspend_size + 4 * 2 188#ifdef CONFIG_ARM_CPU_SUSPEND 189ENTRY(cpu_ca9mp_do_suspend) 190 stmfd sp!, {r4 - r5} 191 mrc p15, 0, r4, c15, c0, 1 @ Diagnostic register 192 mrc p15, 0, r5, c15, c0, 0 @ Power register 193 stmia r0!, {r4 - r5} 194 ldmfd sp!, {r4 - r5} 195 b cpu_v7_do_suspend 196ENDPROC(cpu_ca9mp_do_suspend) 197 198ENTRY(cpu_ca9mp_do_resume) 199 ldmia r0!, {r4 - r5} 200 mrc p15, 0, r10, c15, c0, 1 @ Read Diagnostic register 201 teq r4, r10 @ Already restored? 202 mcrne p15, 0, r4, c15, c0, 1 @ No, so restore it 203 mrc p15, 0, r10, c15, c0, 0 @ Read Power register 204 teq r5, r10 @ Already restored? 205 mcrne p15, 0, r5, c15, c0, 0 @ No, so restore it 206 b cpu_v7_do_resume 207ENDPROC(cpu_ca9mp_do_resume) 208#endif 209 210#ifdef CONFIG_CPU_PJ4B 211 globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm 212 globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext 213 globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init 214 globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin 215 globl_equ cpu_pj4b_reset, cpu_v7_reset 216#ifdef CONFIG_PJ4B_ERRATA_4742 217ENTRY(cpu_pj4b_do_idle) 218 dsb @ WFI may enter a low-power mode 219 wfi 220 dsb @barrier 221 ret lr 222ENDPROC(cpu_pj4b_do_idle) 223#else 224 globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle 225#endif 226 globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area 227#ifdef CONFIG_ARM_CPU_SUSPEND 228ENTRY(cpu_pj4b_do_suspend) 229 stmfd sp!, {r6 - r10} 230 mrc p15, 1, r6, c15, c1, 0 @ save CP15 - extra features 231 mrc p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0 232 mrc p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2 233 mrc p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1 234 mrc p15, 0, r10, c9, c14, 0 @ save CP15 - PMC 235 stmia r0!, {r6 - r10} 236 ldmfd sp!, {r6 - r10} 237 b cpu_v7_do_suspend 238ENDPROC(cpu_pj4b_do_suspend) 239 240ENTRY(cpu_pj4b_do_resume) 241 ldmia r0!, {r6 - r10} 242 mcr p15, 1, r6, c15, c1, 0 @ restore CP15 - extra features 243 mcr p15, 1, r7, c15, c2, 0 @ restore CP15 - Aux Func Modes Ctrl 0 244 mcr p15, 1, r8, c15, c1, 2 @ restore CP15 - Aux Debug Modes Ctrl 2 245 mcr p15, 1, r9, c15, c1, 1 @ restore CP15 - Aux Debug Modes Ctrl 1 246 mcr p15, 0, r10, c9, c14, 0 @ restore CP15 - PMC 247 b cpu_v7_do_resume 248ENDPROC(cpu_pj4b_do_resume) 249#endif 250.globl cpu_pj4b_suspend_size 251.equ cpu_pj4b_suspend_size, cpu_v7_suspend_size + 4 * 5 252 253#endif 254 255/* 256 * __v7_setup 257 * 258 * Initialise TLB, Caches, and MMU state ready to switch the MMU 259 * on. Return in r0 the new CP15 C1 control register setting. 260 * 261 * r1, r2, r4, r5, r9, r13 must be preserved - r13 is not a stack 262 * r4: TTBR0 (low word) 263 * r5: TTBR0 (high word if LPAE) 264 * r8: TTBR1 265 * r9: Main ID register 266 * 267 * This should be able to cover all ARMv7 cores. 268 * 269 * It is assumed that: 270 * - cache type register is implemented 271 */ 272__v7_ca5mp_setup: 273__v7_ca9mp_setup: 274__v7_cr7mp_setup: 275 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting 276 b 1f 277__v7_ca7mp_setup: 278__v7_ca12mp_setup: 279__v7_ca15mp_setup: 280__v7_b15mp_setup: 281__v7_ca17mp_setup: 282 mov r10, #0 2831: adr r0, __v7_setup_stack_ptr 284 ldr r12, [r0] 285 add r12, r12, r0 @ the local stack 286 stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6 287 bl v7_invalidate_l1 288 ldmia r12, {r1-r6, lr} 289#ifdef CONFIG_SMP 290 orr r10, r10, #(1 << 6) @ Enable SMP/nAMP mode 291 ALT_SMP(mrc p15, 0, r0, c1, c0, 1) 292 ALT_UP(mov r0, r10) @ fake it for UP 293 orr r10, r10, r0 @ Set required bits 294 teq r10, r0 @ Were they already set? 295 mcrne p15, 0, r10, c1, c0, 1 @ No, update register 296#endif 297 b __v7_setup_cont 298 299/* 300 * Errata: 301 * r0, r10 available for use 302 * r1, r2, r4, r5, r9, r13: must be preserved 303 * r3: contains MIDR rX number in bits 23-20 304 * r6: contains MIDR rXpY as 8-bit XY number 305 * r9: MIDR 306 */ 307__ca8_errata: 308#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM) 309 teq r3, #0x00100000 @ only present in r1p* 310 mrceq p15, 0, r0, c1, c0, 1 @ read aux control register 311 orreq r0, r0, #(1 << 6) @ set IBE to 1 312 mcreq p15, 0, r0, c1, c0, 1 @ write aux control register 313#endif 314#ifdef CONFIG_ARM_ERRATA_458693 315 teq r6, #0x20 @ only present in r2p0 316 mrceq p15, 0, r0, c1, c0, 1 @ read aux control register 317 orreq r0, r0, #(1 << 5) @ set L1NEON to 1 318 orreq r0, r0, #(1 << 9) @ set PLDNOP to 1 319 mcreq p15, 0, r0, c1, c0, 1 @ write aux control register 320#endif 321#ifdef CONFIG_ARM_ERRATA_460075 322 teq r6, #0x20 @ only present in r2p0 323 mrceq p15, 1, r0, c9, c0, 2 @ read L2 cache aux ctrl register 324 tsteq r0, #1 << 22 325 orreq r0, r0, #(1 << 22) @ set the Write Allocate disable bit 326 mcreq p15, 1, r0, c9, c0, 2 @ write the L2 cache aux ctrl register 327#endif 328 b __errata_finish 329 330__ca9_errata: 331#ifdef CONFIG_ARM_ERRATA_742230 332 cmp r6, #0x22 @ only present up to r2p2 333 mrcle p15, 0, r0, c15, c0, 1 @ read diagnostic register 334 orrle r0, r0, #1 << 4 @ set bit #4 335 mcrle p15, 0, r0, c15, c0, 1 @ write diagnostic register 336#endif 337#ifdef CONFIG_ARM_ERRATA_742231 338 teq r6, #0x20 @ present in r2p0 339 teqne r6, #0x21 @ present in r2p1 340 teqne r6, #0x22 @ present in r2p2 341 mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register 342 orreq r0, r0, #1 << 12 @ set bit #12 343 orreq r0, r0, #1 << 22 @ set bit #22 344 mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register 345#endif 346#ifdef CONFIG_ARM_ERRATA_743622 347 teq r3, #0x00200000 @ only present in r2p* 348 mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register 349 orreq r0, r0, #1 << 6 @ set bit #6 350 mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register 351#endif 352#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP) 353 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0 354 ALT_UP_B(1f) 355 mrclt p15, 0, r0, c15, c0, 1 @ read diagnostic register 356 orrlt r0, r0, #1 << 11 @ set bit #11 357 mcrlt p15, 0, r0, c15, c0, 1 @ write diagnostic register 3581: 359#endif 360 b __errata_finish 361 362__ca15_errata: 363#ifdef CONFIG_ARM_ERRATA_773022 364 cmp r6, #0x4 @ only present up to r0p4 365 mrcle p15, 0, r0, c1, c0, 1 @ read aux control register 366 orrle r0, r0, #1 << 1 @ disable loop buffer 367 mcrle p15, 0, r0, c1, c0, 1 @ write aux control register 368#endif 369 b __errata_finish 370 371__ca12_errata: 372#ifdef CONFIG_ARM_ERRATA_818325_852422 373 mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register 374 orr r10, r10, #1 << 12 @ set bit #12 375 mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register 376#endif 377#ifdef CONFIG_ARM_ERRATA_821420 378 mrc p15, 0, r10, c15, c0, 2 @ read internal feature reg 379 orr r10, r10, #1 << 1 @ set bit #1 380 mcr p15, 0, r10, c15, c0, 2 @ write internal feature reg 381#endif 382#ifdef CONFIG_ARM_ERRATA_825619 383 mrc p15, 0, r10, c15, c0, 1 @ read diagnostic register 384 orr r10, r10, #1 << 24 @ set bit #24 385 mcr p15, 0, r10, c15, c0, 1 @ write diagnostic register 386#endif 387 b __errata_finish 388 389__ca17_errata: 390#ifdef CONFIG_ARM_ERRATA_852421 391 cmp r6, #0x12 @ only present up to r1p2 392 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register 393 orrle r10, r10, #1 << 24 @ set bit #24 394 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register 395#endif 396#ifdef CONFIG_ARM_ERRATA_852423 397 cmp r6, #0x12 @ only present up to r1p2 398 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register 399 orrle r10, r10, #1 << 12 @ set bit #12 400 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register 401#endif 402 b __errata_finish 403 404__v7_pj4b_setup: 405#ifdef CONFIG_CPU_PJ4B 406 407/* Auxiliary Debug Modes Control 1 Register */ 408#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */ 409#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */ 410#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */ 411 412/* Auxiliary Debug Modes Control 2 Register */ 413#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */ 414#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */ 415#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */ 416#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */ 417#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */ 418#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\ 419 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR) 420 421/* Auxiliary Functional Modes Control Register 0 */ 422#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */ 423#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */ 424#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */ 425 426/* Auxiliary Debug Modes Control 0 Register */ 427#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */ 428 429 /* Auxiliary Debug Modes Control 1 Register */ 430 mrc p15, 1, r0, c15, c1, 1 431 orr r0, r0, #PJ4B_CLEAN_LINE 432 orr r0, r0, #PJ4B_INTER_PARITY 433 bic r0, r0, #PJ4B_STATIC_BP 434 mcr p15, 1, r0, c15, c1, 1 435 436 /* Auxiliary Debug Modes Control 2 Register */ 437 mrc p15, 1, r0, c15, c1, 2 438 bic r0, r0, #PJ4B_FAST_LDR 439 orr r0, r0, #PJ4B_AUX_DBG_CTRL2 440 mcr p15, 1, r0, c15, c1, 2 441 442 /* Auxiliary Functional Modes Control Register 0 */ 443 mrc p15, 1, r0, c15, c2, 0 444#ifdef CONFIG_SMP 445 orr r0, r0, #PJ4B_SMP_CFB 446#endif 447 orr r0, r0, #PJ4B_L1_PAR_CHK 448 orr r0, r0, #PJ4B_BROADCAST_CACHE 449 mcr p15, 1, r0, c15, c2, 0 450 451 /* Auxiliary Debug Modes Control 0 Register */ 452 mrc p15, 1, r0, c15, c1, 0 453 orr r0, r0, #PJ4B_WFI_WFE 454 mcr p15, 1, r0, c15, c1, 0 455 456#endif /* CONFIG_CPU_PJ4B */ 457 458__v7_setup: 459 adr r0, __v7_setup_stack_ptr 460 ldr r12, [r0] 461 add r12, r12, r0 @ the local stack 462 stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6 463 bl v7_invalidate_l1 464 ldmia r12, {r1-r6, lr} 465 466__v7_setup_cont: 467 and r0, r9, #0xff000000 @ ARM? 468 teq r0, #0x41000000 469 bne __errata_finish 470 and r3, r9, #0x00f00000 @ variant 471 and r6, r9, #0x0000000f @ revision 472 orr r6, r6, r3, lsr #20-4 @ combine variant and revision 473 ubfx r0, r9, #4, #12 @ primary part number 474 475 /* Cortex-A8 Errata */ 476 ldr r10, =0x00000c08 @ Cortex-A8 primary part number 477 teq r0, r10 478 beq __ca8_errata 479 480 /* Cortex-A9 Errata */ 481 ldr r10, =0x00000c09 @ Cortex-A9 primary part number 482 teq r0, r10 483 beq __ca9_errata 484 485 /* Cortex-A12 Errata */ 486 ldr r10, =0x00000c0d @ Cortex-A12 primary part number 487 teq r0, r10 488 beq __ca12_errata 489 490 /* Cortex-A17 Errata */ 491 ldr r10, =0x00000c0e @ Cortex-A17 primary part number 492 teq r0, r10 493 beq __ca17_errata 494 495 /* Cortex-A15 Errata */ 496 ldr r10, =0x00000c0f @ Cortex-A15 primary part number 497 teq r0, r10 498 beq __ca15_errata 499 500__errata_finish: 501 mov r10, #0 502 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate 503#ifdef CONFIG_MMU 504 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs 505 v7_ttb_setup r10, r4, r5, r8, r3 @ TTBCR, TTBRx setup 506 ldr r3, =PRRR @ PRRR 507 ldr r6, =NMRR @ NMRR 508 mcr p15, 0, r3, c10, c2, 0 @ write PRRR 509 mcr p15, 0, r6, c10, c2, 1 @ write NMRR 510#endif 511 dsb @ Complete invalidations 512#ifndef CONFIG_ARM_THUMBEE 513 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE 514 and r0, r0, #(0xf << 12) @ ThumbEE enabled field 515 teq r0, #(1 << 12) @ check if ThumbEE is present 516 bne 1f 517 mov r3, #0 518 mcr p14, 6, r3, c1, c0, 0 @ Initialize TEEHBR to 0 519 mrc p14, 6, r0, c0, c0, 0 @ load TEECR 520 orr r0, r0, #1 @ set the 1st bit in order to 521 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access 5221: 523#endif 524 adr r3, v7_crval 525 ldmia r3, {r3, r6} 526 ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables 527#ifdef CONFIG_SWP_EMULATE 528 orr r3, r3, #(1 << 10) @ set SW bit in "clear" 529 bic r6, r6, #(1 << 10) @ clear it in "mmuset" 530#endif 531 mrc p15, 0, r0, c1, c0, 0 @ read control register 532 bic r0, r0, r3 @ clear bits them 533 orr r0, r0, r6 @ set them 534 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions 535 ret lr @ return to head.S:__ret 536 537 .align 2 538__v7_setup_stack_ptr: 539 .word PHYS_RELATIVE(__v7_setup_stack, .) 540ENDPROC(__v7_setup) 541 542 .bss 543 .align 2 544__v7_setup_stack: 545 .space 4 * 7 @ 7 registers 546 547 __INITDATA 548 549 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S) 550 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1 551#ifndef CONFIG_ARM_LPAE 552 define_processor_functions ca8, dabort=v7_early_abort, pabort=v7_pabort, suspend=1 553 define_processor_functions ca9mp, dabort=v7_early_abort, pabort=v7_pabort, suspend=1 554#endif 555#ifdef CONFIG_CPU_PJ4B 556 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1 557#endif 558 559 .section ".rodata" 560 561 string cpu_arch_name, "armv7" 562 string cpu_elf_name, "v7" 563 .align 564 565 .section ".proc.info.init", #alloc 566 567 /* 568 * Standard v7 proc info content 569 */ 570.macro __v7_proc name, initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions 571 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \ 572 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags) 573 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \ 574 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags) 575 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \ 576 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags 577 initfn \initfunc, \name 578 .long cpu_arch_name 579 .long cpu_elf_name 580 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \ 581 HWCAP_EDSP | HWCAP_TLS | \hwcaps 582 .long cpu_v7_name 583 .long \proc_fns 584 .long v7wbi_tlb_fns 585 .long v6_user_fns 586 .long v7_cache_fns 587.endm 588 589#ifndef CONFIG_ARM_LPAE 590 /* 591 * ARM Ltd. Cortex A5 processor. 592 */ 593 .type __v7_ca5mp_proc_info, #object 594__v7_ca5mp_proc_info: 595 .long 0x410fc050 596 .long 0xff0ffff0 597 __v7_proc __v7_ca5mp_proc_info, __v7_ca5mp_setup 598 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info 599 600 /* 601 * ARM Ltd. Cortex A9 processor. 602 */ 603 .type __v7_ca9mp_proc_info, #object 604__v7_ca9mp_proc_info: 605 .long 0x410fc090 606 .long 0xff0ffff0 607 __v7_proc __v7_ca9mp_proc_info, __v7_ca9mp_setup, proc_fns = ca9mp_processor_functions 608 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info 609 610 /* 611 * ARM Ltd. Cortex A8 processor. 612 */ 613 .type __v7_ca8_proc_info, #object 614__v7_ca8_proc_info: 615 .long 0x410fc080 616 .long 0xff0ffff0 617 __v7_proc __v7_ca8_proc_info, __v7_setup, proc_fns = ca8_processor_functions 618 .size __v7_ca8_proc_info, . - __v7_ca8_proc_info 619 620#endif /* CONFIG_ARM_LPAE */ 621 622 /* 623 * Marvell PJ4B processor. 624 */ 625#ifdef CONFIG_CPU_PJ4B 626 .type __v7_pj4b_proc_info, #object 627__v7_pj4b_proc_info: 628 .long 0x560f5800 629 .long 0xff0fff00 630 __v7_proc __v7_pj4b_proc_info, __v7_pj4b_setup, proc_fns = pj4b_processor_functions 631 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info 632#endif 633 634 /* 635 * ARM Ltd. Cortex R7 processor. 636 */ 637 .type __v7_cr7mp_proc_info, #object 638__v7_cr7mp_proc_info: 639 .long 0x410fc170 640 .long 0xff0ffff0 641 __v7_proc __v7_cr7mp_proc_info, __v7_cr7mp_setup 642 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info 643 644 /* 645 * ARM Ltd. Cortex A7 processor. 646 */ 647 .type __v7_ca7mp_proc_info, #object 648__v7_ca7mp_proc_info: 649 .long 0x410fc070 650 .long 0xff0ffff0 651 __v7_proc __v7_ca7mp_proc_info, __v7_ca7mp_setup 652 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info 653 654 /* 655 * ARM Ltd. Cortex A12 processor. 656 */ 657 .type __v7_ca12mp_proc_info, #object 658__v7_ca12mp_proc_info: 659 .long 0x410fc0d0 660 .long 0xff0ffff0 661 __v7_proc __v7_ca12mp_proc_info, __v7_ca12mp_setup 662 .size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info 663 664 /* 665 * ARM Ltd. Cortex A15 processor. 666 */ 667 .type __v7_ca15mp_proc_info, #object 668__v7_ca15mp_proc_info: 669 .long 0x410fc0f0 670 .long 0xff0ffff0 671 __v7_proc __v7_ca15mp_proc_info, __v7_ca15mp_setup 672 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info 673 674 /* 675 * Broadcom Corporation Brahma-B15 processor. 676 */ 677 .type __v7_b15mp_proc_info, #object 678__v7_b15mp_proc_info: 679 .long 0x420f00f0 680 .long 0xff0ffff0 681 __v7_proc __v7_b15mp_proc_info, __v7_b15mp_setup 682 .size __v7_b15mp_proc_info, . - __v7_b15mp_proc_info 683 684 /* 685 * ARM Ltd. Cortex A17 processor. 686 */ 687 .type __v7_ca17mp_proc_info, #object 688__v7_ca17mp_proc_info: 689 .long 0x410fc0e0 690 .long 0xff0ffff0 691 __v7_proc __v7_ca17mp_proc_info, __v7_ca17mp_setup 692 .size __v7_ca17mp_proc_info, . - __v7_ca17mp_proc_info 693 694 /* 695 * Qualcomm Inc. Krait processors. 696 */ 697 .type __krait_proc_info, #object 698__krait_proc_info: 699 .long 0x510f0400 @ Required ID value 700 .long 0xff0ffc00 @ Mask for ID 701 /* 702 * Some Krait processors don't indicate support for SDIV and UDIV 703 * instructions in the ARM instruction set, even though they actually 704 * do support them. They also don't indicate support for fused multiply 705 * instructions even though they actually do support them. 706 */ 707 __v7_proc __krait_proc_info, __v7_setup, hwcaps = HWCAP_IDIV | HWCAP_VFPv4 708 .size __krait_proc_info, . - __krait_proc_info 709 710 /* 711 * Match any ARMv7 processor core. 712 */ 713 .type __v7_proc_info, #object 714__v7_proc_info: 715 .long 0x000f0000 @ Required ID value 716 .long 0x000f0000 @ Mask for ID 717 __v7_proc __v7_proc_info, __v7_setup 718 .size __v7_proc_info, . - __v7_proc_info 719