2 * linux/arch/arm/mm/proc-v7.S
4 * Copyright (C) 2001 Deep Blue Solutions Ltd.
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.
10 * This is the "shell" of the ARMv7 processor support.
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>
20 #include "proc-macros.S"
22 #ifdef CONFIG_ARM_LPAE
23 #include "proc-v7-3level.S"
25 #include "proc-v7-2level.S"
28 ENTRY(cpu_v7_proc_init)
30 ENDPROC(cpu_v7_proc_init)
32 ENTRY(cpu_v7_proc_fin)
33 mrc p15, 0, r0, c1, c0, 0 @ ctrl register
34 bic r0, r0, #0x1000 @ ...i............
35 bic r0, r0, #0x0006 @ .............ca.
36 mcr p15, 0, r0, c1, c0, 0 @ disable caches
38 ENDPROC(cpu_v7_proc_fin)
43 * Perform a soft reset of the system. Put the CPU into the
44 * same state as it would be if it had been reset, and branch
45 * to what would be the reset vector.
47 * - loc - location to jump to for soft reset
49 * This code must be executed using a flat identity mapping with
53 .pushsection .idmap.text, "ax"
55 mrc p15, 0, r1, c1, c0, 0 @ ctrl register
56 bic r1, r1, #0x1 @ ...............m
57 THUMB( bic r1, r1, #1 << 30 ) @ SCTLR.TE (Thumb exceptions)
58 mcr p15, 0, r1, c1, c0, 0 @ disable MMU
67 * Idle the processor (eg, wait for interrupt).
69 * IRQs are already disabled.
72 dsb @ WFI may enter a low-power mode
75 ENDPROC(cpu_v7_do_idle)
77 ENTRY(cpu_v7_dcache_clean_area)
78 ALT_SMP(mov pc, lr) @ MP extensions imply L1 PTW
80 dcache_line_size r2, r3
81 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
87 ENDPROC(cpu_v7_dcache_clean_area)
89 string cpu_v7_name, "ARMv7 Processor"
92 /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
93 .globl cpu_v7_suspend_size
94 .equ cpu_v7_suspend_size, 4 * 8
95 #ifdef CONFIG_ARM_CPU_SUSPEND
96 ENTRY(cpu_v7_do_suspend)
97 stmfd sp!, {r4 - r10, lr}
98 mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID
99 mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID
102 mrc p15, 0, r6, c3, c0, 0 @ Domain ID
103 mrc p15, 0, r7, c2, c0, 1 @ TTB 1
104 mrc p15, 0, r11, c2, c0, 2 @ TTB control register
106 mrc p15, 0, r8, c1, c0, 0 @ Control register
107 mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register
108 mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control
110 ldmfd sp!, {r4 - r10, pc}
111 ENDPROC(cpu_v7_do_suspend)
113 ENTRY(cpu_v7_do_resume)
115 mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
116 mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID
118 mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID
119 mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID
122 mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs
123 mcr p15, 0, r6, c3, c0, 0 @ Domain ID
124 #ifndef CONFIG_ARM_LPAE
125 ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP)
126 ALT_UP(orr r1, r1, #TTB_FLAGS_UP)
128 mcr p15, 0, r1, c2, c0, 0 @ TTB 0
129 mcr p15, 0, r7, c2, c0, 1 @ TTB 1
130 mcr p15, 0, r11, c2, c0, 2 @ TTB control register
133 mcr p15, 0, r4, c10, c2, 0 @ write PRRR
134 mcr p15, 0, r5, c10, c2, 1 @ write NMRR
135 #endif /* CONFIG_MMU */
136 mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register
137 teq r4, r9 @ Is it already set?
138 mcrne p15, 0, r9, c1, c0, 1 @ No, so write it
139 mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control
142 mov r0, r8 @ control register
144 ENDPROC(cpu_v7_do_resume)
147 #ifdef CONFIG_CPU_PJ4B
148 globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm
149 globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext
150 globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init
151 globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin
152 globl_equ cpu_pj4b_reset, cpu_v7_reset
153 #ifdef CONFIG_PJ4B_ERRATA_4742
154 ENTRY(cpu_pj4b_do_idle)
155 dsb @ WFI may enter a low-power mode
159 ENDPROC(cpu_pj4b_do_idle)
161 globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle
163 globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area
164 globl_equ cpu_pj4b_do_suspend, cpu_v7_do_suspend
165 globl_equ cpu_pj4b_do_resume, cpu_v7_do_resume
166 globl_equ cpu_pj4b_suspend_size, cpu_v7_suspend_size
173 * Initialise TLB, Caches, and MMU state ready to switch the MMU
174 * on. Return in r0 the new CP15 C1 control register setting.
176 * This should be able to cover all ARMv7 cores.
178 * It is assumed that:
179 * - cache type register is implemented
184 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
191 ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
192 ALT_UP(mov r0, #(1 << 6)) @ fake it for UP
193 tst r0, #(1 << 6) @ SMP/nAMP mode enabled?
194 orreq r0, r0, #(1 << 6) @ Enable SMP/nAMP mode
195 orreq r0, r0, r10 @ Enable CPU-specific SMP bits
196 mcreq p15, 0, r0, c1, c0, 1
201 #ifdef CONFIG_CPU_PJ4B
203 /* Auxiliary Debug Modes Control 1 Register */
204 #define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
205 #define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
206 #define PJ4B_BCK_OFF_STREX (1 << 5) /* Enable the back off of STREX instr */
207 #define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
209 /* Auxiliary Debug Modes Control 2 Register */
210 #define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
211 #define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
212 #define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
213 #define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
214 #define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
215 #define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
216 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
218 /* Auxiliary Functional Modes Control Register 0 */
219 #define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
220 #define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
221 #define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
223 /* Auxiliary Debug Modes Control 0 Register */
224 #define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
226 /* Auxiliary Debug Modes Control 1 Register */
227 mrc p15, 1, r0, c15, c1, 1
228 orr r0, r0, #PJ4B_CLEAN_LINE
229 orr r0, r0, #PJ4B_BCK_OFF_STREX
230 orr r0, r0, #PJ4B_INTER_PARITY
231 bic r0, r0, #PJ4B_STATIC_BP
232 mcr p15, 1, r0, c15, c1, 1
234 /* Auxiliary Debug Modes Control 2 Register */
235 mrc p15, 1, r0, c15, c1, 2
236 bic r0, r0, #PJ4B_FAST_LDR
237 orr r0, r0, #PJ4B_AUX_DBG_CTRL2
238 mcr p15, 1, r0, c15, c1, 2
240 /* Auxiliary Functional Modes Control Register 0 */
241 mrc p15, 1, r0, c15, c2, 0
243 orr r0, r0, #PJ4B_SMP_CFB
245 orr r0, r0, #PJ4B_L1_PAR_CHK
246 orr r0, r0, #PJ4B_BROADCAST_CACHE
247 mcr p15, 1, r0, c15, c2, 0
249 /* Auxiliary Debug Modes Control 0 Register */
250 mrc p15, 1, r0, c15, c1, 0
251 orr r0, r0, #PJ4B_WFI_WFE
252 mcr p15, 1, r0, c15, c1, 0
254 #endif /* CONFIG_CPU_PJ4B */
257 adr r12, __v7_setup_stack @ the local stack
258 stmia r12, {r0-r5, r7, r9, r11, lr}
259 bl v7_flush_dcache_louis
260 ldmia r12, {r0-r5, r7, r9, r11, lr}
262 mrc p15, 0, r0, c0, c0, 0 @ read main ID register
263 and r10, r0, #0xff000000 @ ARM?
266 and r5, r0, #0x00f00000 @ variant
267 and r6, r0, #0x0000000f @ revision
268 orr r6, r6, r5, lsr #20-4 @ combine variant and revision
269 ubfx r0, r0, #4, #12 @ primary part number
271 /* Cortex-A8 Errata */
272 ldr r10, =0x00000c08 @ Cortex-A8 primary part number
275 #if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
277 teq r5, #0x00100000 @ only present in r1p*
278 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
279 orreq r10, r10, #(1 << 6) @ set IBE to 1
280 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
282 #ifdef CONFIG_ARM_ERRATA_458693
283 teq r6, #0x20 @ only present in r2p0
284 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
285 orreq r10, r10, #(1 << 5) @ set L1NEON to 1
286 orreq r10, r10, #(1 << 9) @ set PLDNOP to 1
287 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
289 #ifdef CONFIG_ARM_ERRATA_460075
290 teq r6, #0x20 @ only present in r2p0
291 mrceq p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register
293 orreq r10, r10, #(1 << 22) @ set the Write Allocate disable bit
294 mcreq p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register
298 /* Cortex-A9 Errata */
299 2: ldr r10, =0x00000c09 @ Cortex-A9 primary part number
302 #ifdef CONFIG_ARM_ERRATA_742230
303 cmp r6, #0x22 @ only present up to r2p2
304 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
305 orrle r10, r10, #1 << 4 @ set bit #4
306 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
308 #ifdef CONFIG_ARM_ERRATA_742231
309 teq r6, #0x20 @ present in r2p0
310 teqne r6, #0x21 @ present in r2p1
311 teqne r6, #0x22 @ present in r2p2
312 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
313 orreq r10, r10, #1 << 12 @ set bit #12
314 orreq r10, r10, #1 << 22 @ set bit #22
315 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
317 #ifdef CONFIG_ARM_ERRATA_743622
318 teq r5, #0x00200000 @ only present in r2p*
319 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
320 orreq r10, r10, #1 << 6 @ set bit #6
321 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
323 #if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
324 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
326 mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register
327 orrlt r10, r10, #1 << 11 @ set bit #11
328 mcrlt p15, 0, r10, c15, c0, 1 @ write diagnostic register
333 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
336 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
337 v7_ttb_setup r10, r4, r8, r5 @ TTBCR, TTBRx setup
340 mcr p15, 0, r5, c10, c2, 0 @ write PRRR
341 mcr p15, 0, r6, c10, c2, 1 @ write NMRR
343 #ifndef CONFIG_ARM_THUMBEE
344 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
345 and r0, r0, #(0xf << 12) @ ThumbEE enabled field
346 teq r0, #(1 << 12) @ check if ThumbEE is present
349 mcr p14, 6, r5, c1, c0, 0 @ Initialize TEEHBR to 0
350 mrc p14, 6, r0, c0, c0, 0 @ load TEECR
351 orr r0, r0, #1 @ set the 1st bit in order to
352 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
357 #ifdef CONFIG_CPU_ENDIAN_BE8
358 orr r6, r6, #1 << 25 @ big-endian page tables
360 #ifdef CONFIG_SWP_EMULATE
361 orr r5, r5, #(1 << 10) @ set SW bit in "clear"
362 bic r6, r6, #(1 << 10) @ clear it in "mmuset"
364 mrc p15, 0, r0, c1, c0, 0 @ read control register
365 bic r0, r0, r5 @ clear bits them
366 orr r0, r0, r6 @ set them
367 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
368 mov pc, lr @ return to head.S:__ret
373 .space 4 * 11 @ 11 registers
377 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
378 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
379 #ifdef CONFIG_CPU_PJ4B
380 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
385 string cpu_arch_name, "armv7"
386 string cpu_elf_name, "v7"
389 .section ".proc.info.init", #alloc, #execinstr
392 * Standard v7 proc info content
394 .macro __v7_proc initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions
395 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
396 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
397 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
398 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
399 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
400 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
404 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
405 HWCAP_EDSP | HWCAP_TLS | \hwcaps
413 #ifndef CONFIG_ARM_LPAE
415 * ARM Ltd. Cortex A5 processor.
417 .type __v7_ca5mp_proc_info, #object
418 __v7_ca5mp_proc_info:
421 __v7_proc __v7_ca5mp_setup
422 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
425 * ARM Ltd. Cortex A9 processor.
427 .type __v7_ca9mp_proc_info, #object
428 __v7_ca9mp_proc_info:
431 __v7_proc __v7_ca9mp_setup
432 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
434 #endif /* CONFIG_ARM_LPAE */
437 * Marvell PJ4B processor.
439 #ifdef CONFIG_CPU_PJ4B
440 .type __v7_pj4b_proc_info, #object
444 __v7_proc __v7_pj4b_setup, proc_fns = pj4b_processor_functions
445 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
449 * ARM Ltd. Cortex R7 processor.
451 .type __v7_cr7mp_proc_info, #object
452 __v7_cr7mp_proc_info:
455 __v7_proc __v7_cr7mp_setup
456 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
459 * ARM Ltd. Cortex A7 processor.
461 .type __v7_ca7mp_proc_info, #object
462 __v7_ca7mp_proc_info:
465 __v7_proc __v7_ca7mp_setup
466 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
469 * ARM Ltd. Cortex A15 processor.
471 .type __v7_ca15mp_proc_info, #object
472 __v7_ca15mp_proc_info:
475 __v7_proc __v7_ca15mp_setup
476 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
479 * Qualcomm Inc. Krait processors.
481 .type __krait_proc_info, #object
483 .long 0x510f0400 @ Required ID value
484 .long 0xff0ffc00 @ Mask for ID
486 * Some Krait processors don't indicate support for SDIV and UDIV
487 * instructions in the ARM instruction set, even though they actually
490 __v7_proc __v7_setup, hwcaps = HWCAP_IDIV
491 .size __krait_proc_info, . - __krait_proc_info
494 * Match any ARMv7 processor core.
496 .type __v7_proc_info, #object
498 .long 0x000f0000 @ Required ID value
499 .long 0x000f0000 @ Mask for ID
501 .size __v7_proc_info, . - __v7_proc_info