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Catalin Marinasbbe88882007-05-08 22:27:46 +01001/*
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 */
Tim Abbott991da172009-04-27 14:02:22 -040012#include <linux/init.h>
Catalin Marinasbbe88882007-05-08 22:27:46 +010013#include <linux/linkage.h>
14#include <asm/assembler.h>
15#include <asm/asm-offsets.h>
Russell King5ec94072008-09-07 19:15:31 +010016#include <asm/hwcap.h>
Catalin Marinasbbe88882007-05-08 22:27:46 +010017#include <asm/pgtable-hwdef.h>
18#include <asm/pgtable.h>
19
20#include "proc-macros.S"
21
Catalin Marinas1b6ba462011-11-22 17:30:29 +000022#ifdef CONFIG_ARM_LPAE
23#include "proc-v7-3level.S"
24#else
Catalin Marinas8d2cd3a2011-11-22 17:30:28 +000025#include "proc-v7-2level.S"
Catalin Marinas1b6ba462011-11-22 17:30:29 +000026#endif
Jon Callan73b63ef2008-11-06 13:23:09 +000027
Catalin Marinasbbe88882007-05-08 22:27:46 +010028ENTRY(cpu_v7_proc_init)
Russell King6ebbf2c2014-06-30 16:29:12 +010029 ret lr
Catalin Marinas93ed3972008-08-28 11:22:32 +010030ENDPROC(cpu_v7_proc_init)
Catalin Marinasbbe88882007-05-08 22:27:46 +010031
32ENTRY(cpu_v7_proc_fin)
Tony Lindgren1f667c62010-01-19 17:01:33 +010033 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
Russell King6ebbf2c2014-06-30 16:29:12 +010037 ret lr
Catalin Marinas93ed3972008-08-28 11:22:32 +010038ENDPROC(cpu_v7_proc_fin)
Catalin Marinasbbe88882007-05-08 22:27:46 +010039
40/*
41 * cpu_v7_reset(loc)
42 *
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.
46 *
47 * - loc - location to jump to for soft reset
Will Deaconf4daf062011-06-06 12:27:34 +010048 *
49 * This code must be executed using a flat identity mapping with
50 * caches disabled.
Catalin Marinasbbe88882007-05-08 22:27:46 +010051 */
52 .align 5
Will Deacon1a4baaf2011-11-15 13:25:04 +000053 .pushsection .idmap.text, "ax"
Catalin Marinasbbe88882007-05-08 22:27:46 +010054ENTRY(cpu_v7_reset)
Will Deaconf4daf062011-06-06 12:27:34 +010055 mrc p15, 0, r1, c1, c0, 0 @ ctrl register
56 bic r1, r1, #0x1 @ ...............m
Will Deacon0f81bb62011-08-26 16:34:51 +010057 THUMB( bic r1, r1, #1 << 30 ) @ SCTLR.TE (Thumb exceptions)
Will Deaconf4daf062011-06-06 12:27:34 +010058 mcr p15, 0, r1, c1, c0, 0 @ disable MMU
59 isb
Dave Martin153cd8e2012-10-16 11:54:00 +010060 bx r0
Catalin Marinas93ed3972008-08-28 11:22:32 +010061ENDPROC(cpu_v7_reset)
Will Deacon1a4baaf2011-11-15 13:25:04 +000062 .popsection
Catalin Marinasbbe88882007-05-08 22:27:46 +010063
64/*
65 * cpu_v7_do_idle()
66 *
67 * Idle the processor (eg, wait for interrupt).
68 *
69 * IRQs are already disabled.
70 */
71ENTRY(cpu_v7_do_idle)
Catalin Marinas8553cb62008-11-10 14:14:11 +000072 dsb @ WFI may enter a low-power mode
Catalin Marinas000b5022008-10-03 11:09:10 +010073 wfi
Russell King6ebbf2c2014-06-30 16:29:12 +010074 ret lr
Catalin Marinas93ed3972008-08-28 11:22:32 +010075ENDPROC(cpu_v7_do_idle)
Catalin Marinasbbe88882007-05-08 22:27:46 +010076
77ENTRY(cpu_v7_dcache_clean_area)
Will Deaconbf3f0f32013-07-15 14:26:19 +010078 ALT_SMP(W(nop)) @ MP extensions imply L1 PTW
79 ALT_UP_B(1f)
Russell King6ebbf2c2014-06-30 16:29:12 +010080 ret lr
Will Deaconbf3f0f32013-07-15 14:26:19 +0100811: dcache_line_size r2, r3
822: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
Catalin Marinasbbe88882007-05-08 22:27:46 +010083 add r0, r0, r2
84 subs r1, r1, r2
Will Deaconbf3f0f32013-07-15 14:26:19 +010085 bhi 2b
Will Deacon6abdd492013-05-13 12:01:12 +010086 dsb ishst
Russell King6ebbf2c2014-06-30 16:29:12 +010087 ret lr
Catalin Marinas93ed3972008-08-28 11:22:32 +010088ENDPROC(cpu_v7_dcache_clean_area)
Catalin Marinasbbe88882007-05-08 22:27:46 +010089
Dave Martin78a8f3c2011-06-23 17:26:19 +010090 string cpu_v7_name, "ARMv7 Processor"
Catalin Marinasbbe88882007-05-08 22:27:46 +010091 .align
92
Russell Kingf6b0fa02011-02-06 15:48:39 +000093/* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */
94.globl cpu_v7_suspend_size
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +010095.equ cpu_v7_suspend_size, 4 * 9
Arnd Bergmann15e0d9e2011-10-01 21:09:39 +020096#ifdef CONFIG_ARM_CPU_SUSPEND
Russell Kingf6b0fa02011-02-06 15:48:39 +000097ENTRY(cpu_v7_do_suspend)
Anson Huangfa0708b2015-12-07 10:09:19 +010098 stmfd sp!, {r4 - r11, lr}
Russell Kingf6b0fa02011-02-06 15:48:39 +000099 mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID
Russell King1aede682011-08-28 10:30:34 +0100100 mrc p15, 0, r5, c13, c0, 3 @ User r/o thread ID
101 stmia r0!, {r4 - r5}
Will Deaconaa1aadc2012-02-23 13:51:38 +0000102#ifdef CONFIG_MMU
Russell Kingf6b0fa02011-02-06 15:48:39 +0000103 mrc p15, 0, r6, c3, c0, 0 @ Domain ID
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +0100104#ifdef CONFIG_ARM_LPAE
105 mrrc p15, 1, r5, r7, c2 @ TTB 1
106#else
Russell Kingde8e71c2011-08-27 22:39:09 +0100107 mrc p15, 0, r7, c2, c0, 1 @ TTB 1
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +0100108#endif
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000109 mrc p15, 0, r11, c2, c0, 2 @ TTB control register
Will Deaconaa1aadc2012-02-23 13:51:38 +0000110#endif
Russell Kingde8e71c2011-08-27 22:39:09 +0100111 mrc p15, 0, r8, c1, c0, 0 @ Control register
112 mrc p15, 0, r9, c1, c0, 1 @ Auxiliary control register
113 mrc p15, 0, r10, c1, c0, 2 @ Co-processor access control
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +0100114 stmia r0, {r5 - r11}
Anson Huangfa0708b2015-12-07 10:09:19 +0100115 ldmfd sp!, {r4 - r11, pc}
Russell Kingf6b0fa02011-02-06 15:48:39 +0000116ENDPROC(cpu_v7_do_suspend)
117
118ENTRY(cpu_v7_do_resume)
119 mov ip, #0
Russell Kingf6b0fa02011-02-06 15:48:39 +0000120 mcr p15, 0, ip, c7, c5, 0 @ invalidate I cache
Russell King1aede682011-08-28 10:30:34 +0100121 mcr p15, 0, ip, c13, c0, 1 @ set reserved context ID
122 ldmia r0!, {r4 - r5}
Russell Kingf6b0fa02011-02-06 15:48:39 +0000123 mcr p15, 0, r4, c13, c0, 0 @ FCSE/PID
Russell King1aede682011-08-28 10:30:34 +0100124 mcr p15, 0, r5, c13, c0, 3 @ User r/o thread ID
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +0100125 ldmia r0, {r5 - r11}
Will Deaconaa1aadc2012-02-23 13:51:38 +0000126#ifdef CONFIG_MMU
127 mcr p15, 0, ip, c8, c7, 0 @ invalidate TLBs
Russell Kingf6b0fa02011-02-06 15:48:39 +0000128 mcr p15, 0, r6, c3, c0, 0 @ Domain ID
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +0100129#ifdef CONFIG_ARM_LPAE
130 mcrr p15, 0, r1, ip, c2 @ TTB 0
131 mcrr p15, 1, r5, r7, c2 @ TTB 1
132#else
Russell Kingde8e71c2011-08-27 22:39:09 +0100133 ALT_SMP(orr r1, r1, #TTB_FLAGS_SMP)
134 ALT_UP(orr r1, r1, #TTB_FLAGS_UP)
135 mcr p15, 0, r1, c2, c0, 0 @ TTB 0
136 mcr p15, 0, r7, c2, c0, 1 @ TTB 1
Mahesh Sivasubramanianf3db3f42013-11-08 23:25:20 +0100137#endif
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000138 mcr p15, 0, r11, c2, c0, 2 @ TTB control register
Russell Kingf6b0fa02011-02-06 15:48:39 +0000139 ldr r4, =PRRR @ PRRR
140 ldr r5, =NMRR @ NMRR
141 mcr p15, 0, r4, c10, c2, 0 @ write PRRR
142 mcr p15, 0, r5, c10, c2, 1 @ write NMRR
Will Deaconaa1aadc2012-02-23 13:51:38 +0000143#endif /* CONFIG_MMU */
144 mrc p15, 0, r4, c1, c0, 1 @ Read Auxiliary control register
145 teq r4, r9 @ Is it already set?
146 mcrne p15, 0, r9, c1, c0, 1 @ No, so write it
147 mcr p15, 0, r10, c1, c0, 2 @ Co-processor access control
Russell Kingf6b0fa02011-02-06 15:48:39 +0000148 isb
Russell Kingf35235a2011-08-27 00:37:38 +0100149 dsb
Russell Kingde8e71c2011-08-27 22:39:09 +0100150 mov r0, r8 @ control register
Russell Kingf6b0fa02011-02-06 15:48:39 +0000151 b cpu_resume_mmu
152ENDPROC(cpu_v7_do_resume)
Russell Kingf6b0fa02011-02-06 15:48:39 +0000153#endif
154
Shawn Guoddd0c532014-07-16 07:40:53 +0100155/*
Russell Kinga6d746782015-04-07 15:35:24 +0100156 * Cortex-A8
157 */
158 globl_equ cpu_ca8_proc_init, cpu_v7_proc_init
159 globl_equ cpu_ca8_proc_fin, cpu_v7_proc_fin
160 globl_equ cpu_ca8_reset, cpu_v7_reset
161 globl_equ cpu_ca8_do_idle, cpu_v7_do_idle
162 globl_equ cpu_ca8_dcache_clean_area, cpu_v7_dcache_clean_area
163 globl_equ cpu_ca8_set_pte_ext, cpu_v7_set_pte_ext
164 globl_equ cpu_ca8_suspend_size, cpu_v7_suspend_size
165#ifdef CONFIG_ARM_CPU_SUSPEND
166 globl_equ cpu_ca8_do_suspend, cpu_v7_do_suspend
167 globl_equ cpu_ca8_do_resume, cpu_v7_do_resume
168#endif
169
170/*
Shawn Guoddd0c532014-07-16 07:40:53 +0100171 * Cortex-A9 processor functions
172 */
173 globl_equ cpu_ca9mp_proc_init, cpu_v7_proc_init
174 globl_equ cpu_ca9mp_proc_fin, cpu_v7_proc_fin
175 globl_equ cpu_ca9mp_reset, cpu_v7_reset
176 globl_equ cpu_ca9mp_do_idle, cpu_v7_do_idle
177 globl_equ cpu_ca9mp_dcache_clean_area, cpu_v7_dcache_clean_area
178 globl_equ cpu_ca9mp_switch_mm, cpu_v7_switch_mm
179 globl_equ cpu_ca9mp_set_pte_ext, cpu_v7_set_pte_ext
180.globl cpu_ca9mp_suspend_size
181.equ cpu_ca9mp_suspend_size, cpu_v7_suspend_size + 4 * 2
182#ifdef CONFIG_ARM_CPU_SUSPEND
183ENTRY(cpu_ca9mp_do_suspend)
184 stmfd sp!, {r4 - r5}
185 mrc p15, 0, r4, c15, c0, 1 @ Diagnostic register
186 mrc p15, 0, r5, c15, c0, 0 @ Power register
187 stmia r0!, {r4 - r5}
188 ldmfd sp!, {r4 - r5}
189 b cpu_v7_do_suspend
190ENDPROC(cpu_ca9mp_do_suspend)
191
192ENTRY(cpu_ca9mp_do_resume)
193 ldmia r0!, {r4 - r5}
194 mrc p15, 0, r10, c15, c0, 1 @ Read Diagnostic register
195 teq r4, r10 @ Already restored?
196 mcrne p15, 0, r4, c15, c0, 1 @ No, so restore it
197 mrc p15, 0, r10, c15, c0, 0 @ Read Power register
198 teq r5, r10 @ Already restored?
199 mcrne p15, 0, r5, c15, c0, 0 @ No, so restore it
200 b cpu_v7_do_resume
201ENDPROC(cpu_ca9mp_do_resume)
202#endif
203
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100204#ifdef CONFIG_CPU_PJ4B
205 globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm
206 globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext
207 globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init
208 globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin
209 globl_equ cpu_pj4b_reset, cpu_v7_reset
210#ifdef CONFIG_PJ4B_ERRATA_4742
211ENTRY(cpu_pj4b_do_idle)
212 dsb @ WFI may enter a low-power mode
213 wfi
214 dsb @barrier
Russell King6ebbf2c2014-06-30 16:29:12 +0100215 ret lr
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100216ENDPROC(cpu_pj4b_do_idle)
217#else
218 globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle
219#endif
220 globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area
Gregory CLEMENT16c79a32014-03-28 12:21:16 +0100221#ifdef CONFIG_ARM_CPU_SUSPEND
222ENTRY(cpu_pj4b_do_suspend)
223 stmfd sp!, {r6 - r10}
224 mrc p15, 1, r6, c15, c1, 0 @ save CP15 - extra features
225 mrc p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0
226 mrc p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2
227 mrc p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1
228 mrc p15, 0, r10, c9, c14, 0 @ save CP15 - PMC
229 stmia r0!, {r6 - r10}
230 ldmfd sp!, {r6 - r10}
231 b cpu_v7_do_suspend
232ENDPROC(cpu_pj4b_do_suspend)
233
234ENTRY(cpu_pj4b_do_resume)
235 ldmia r0!, {r6 - r10}
Shawn Guo7ca791c2014-07-03 09:56:59 +0100236 mcr p15, 1, r6, c15, c1, 0 @ restore CP15 - extra features
237 mcr p15, 1, r7, c15, c2, 0 @ restore CP15 - Aux Func Modes Ctrl 0
238 mcr p15, 1, r8, c15, c1, 2 @ restore CP15 - Aux Debug Modes Ctrl 2
239 mcr p15, 1, r9, c15, c1, 1 @ restore CP15 - Aux Debug Modes Ctrl 1
240 mcr p15, 0, r10, c9, c14, 0 @ restore CP15 - PMC
Gregory CLEMENT16c79a32014-03-28 12:21:16 +0100241 b cpu_v7_do_resume
242ENDPROC(cpu_pj4b_do_resume)
243#endif
244.globl cpu_pj4b_suspend_size
Shawn Guo7ca791c2014-07-03 09:56:59 +0100245.equ cpu_pj4b_suspend_size, cpu_v7_suspend_size + 4 * 5
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100246
247#endif
248
Catalin Marinasbbe88882007-05-08 22:27:46 +0100249/*
250 * __v7_setup
251 *
252 * Initialise TLB, Caches, and MMU state ready to switch the MMU
253 * on. Return in r0 the new CP15 C1 control register setting.
254 *
Russell Kingc76f2382015-04-04 21:46:35 +0100255 * r1, r2, r4, r5, r9, r13 must be preserved - r13 is not a stack
Russell King17e7bf82015-04-04 21:34:33 +0100256 * r4: TTBR0 (low word)
257 * r5: TTBR0 (high word if LPAE)
258 * r8: TTBR1
259 * r9: Main ID register
260 *
Catalin Marinasbbe88882007-05-08 22:27:46 +0100261 * This should be able to cover all ARMv7 cores.
262 *
263 * It is assumed that:
264 * - cache type register is implemented
265 */
Pawel Moll15eb1692011-05-20 14:39:29 +0100266__v7_ca5mp_setup:
Daniel Walker14eff182010-09-17 16:42:10 +0100267__v7_ca9mp_setup:
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000268__v7_cr7mp_setup:
269 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
Will Deacon7665d9d2011-01-12 17:10:45 +0000270 b 1f
Pawel Mollb4244732011-12-09 20:00:39 +0100271__v7_ca7mp_setup:
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100272__v7_ca12mp_setup:
Will Deacon7665d9d2011-01-12 17:10:45 +0000273__v7_ca15mp_setup:
Marc Carinoc51e78e2014-07-23 00:31:43 +0100274__v7_b15mp_setup:
Will Deaconcd000cf2014-05-02 17:06:02 +0100275__v7_ca17mp_setup:
Will Deacon7665d9d2011-01-12 17:10:45 +0000276 mov r10, #0
Nicolas Pitreb563d062015-12-04 21:36:40 +01002771: adr r0, __v7_setup_stack_ptr
278 ldr r12, [r0]
279 add r12, r12, r0 @ the local stack
280 stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6
Russell Kingbac51ad2015-07-09 00:30:24 +0100281 bl v7_invalidate_l1
Nicolas Pitreb563d062015-12-04 21:36:40 +0100282 ldmia r12, {r1-r6, lr}
Jon Callan73b63ef2008-11-06 13:23:09 +0000283#ifdef CONFIG_SMP
Russell King0fc03d42016-03-29 11:08:22 +0100284 orr r10, r10, #(1 << 6) @ Enable SMP/nAMP mode
Russell Kingf00ec482010-09-04 10:47:48 +0100285 ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
Russell King0fc03d42016-03-29 11:08:22 +0100286 ALT_UP(mov r0, r10) @ fake it for UP
287 orr r10, r10, r0 @ Set required bits
288 teq r10, r0 @ Were they already set?
289 mcrne p15, 0, r10, c1, c0, 1 @ No, update register
Jon Callan73b63ef2008-11-06 13:23:09 +0000290#endif
Russell Kingbac51ad2015-07-09 00:30:24 +0100291 b __v7_setup_cont
Gregory CLEMENTde490192012-10-03 11:58:07 +0200292
Russell Kingc76f2382015-04-04 21:46:35 +0100293/*
294 * Errata:
295 * r0, r10 available for use
296 * r1, r2, r4, r5, r9, r13: must be preserved
297 * r3: contains MIDR rX number in bits 23-20
298 * r6: contains MIDR rXpY as 8-bit XY number
299 * r9: MIDR
300 */
Russell King17e7bf82015-04-04 21:34:33 +0100301__ca8_errata:
302#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
303 teq r3, #0x00100000 @ only present in r1p*
Russell Kingc76f2382015-04-04 21:46:35 +0100304 mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
305 orreq r0, r0, #(1 << 6) @ set IBE to 1
306 mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
Russell King17e7bf82015-04-04 21:34:33 +0100307#endif
308#ifdef CONFIG_ARM_ERRATA_458693
309 teq r6, #0x20 @ only present in r2p0
Russell Kingc76f2382015-04-04 21:46:35 +0100310 mrceq p15, 0, r0, c1, c0, 1 @ read aux control register
311 orreq r0, r0, #(1 << 5) @ set L1NEON to 1
312 orreq r0, r0, #(1 << 9) @ set PLDNOP to 1
313 mcreq p15, 0, r0, c1, c0, 1 @ write aux control register
Russell King17e7bf82015-04-04 21:34:33 +0100314#endif
315#ifdef CONFIG_ARM_ERRATA_460075
316 teq r6, #0x20 @ only present in r2p0
Russell Kingc76f2382015-04-04 21:46:35 +0100317 mrceq p15, 1, r0, c9, c0, 2 @ read L2 cache aux ctrl register
318 tsteq r0, #1 << 22
319 orreq r0, r0, #(1 << 22) @ set the Write Allocate disable bit
320 mcreq p15, 1, r0, c9, c0, 2 @ write the L2 cache aux ctrl register
Russell King17e7bf82015-04-04 21:34:33 +0100321#endif
322 b __errata_finish
323
324__ca9_errata:
325#ifdef CONFIG_ARM_ERRATA_742230
326 cmp r6, #0x22 @ only present up to r2p2
Russell Kingc76f2382015-04-04 21:46:35 +0100327 mrcle p15, 0, r0, c15, c0, 1 @ read diagnostic register
328 orrle r0, r0, #1 << 4 @ set bit #4
329 mcrle p15, 0, r0, c15, c0, 1 @ write diagnostic register
Russell King17e7bf82015-04-04 21:34:33 +0100330#endif
331#ifdef CONFIG_ARM_ERRATA_742231
332 teq r6, #0x20 @ present in r2p0
333 teqne r6, #0x21 @ present in r2p1
334 teqne r6, #0x22 @ present in r2p2
Russell Kingc76f2382015-04-04 21:46:35 +0100335 mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
336 orreq r0, r0, #1 << 12 @ set bit #12
337 orreq r0, r0, #1 << 22 @ set bit #22
338 mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
Russell King17e7bf82015-04-04 21:34:33 +0100339#endif
340#ifdef CONFIG_ARM_ERRATA_743622
341 teq r3, #0x00200000 @ only present in r2p*
Russell Kingc76f2382015-04-04 21:46:35 +0100342 mrceq p15, 0, r0, c15, c0, 1 @ read diagnostic register
343 orreq r0, r0, #1 << 6 @ set bit #6
344 mcreq p15, 0, r0, c15, c0, 1 @ write diagnostic register
Russell King17e7bf82015-04-04 21:34:33 +0100345#endif
346#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
347 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
348 ALT_UP_B(1f)
Russell Kingc76f2382015-04-04 21:46:35 +0100349 mrclt p15, 0, r0, c15, c0, 1 @ read diagnostic register
350 orrlt r0, r0, #1 << 11 @ set bit #11
351 mcrlt p15, 0, r0, c15, c0, 1 @ write diagnostic register
Russell King17e7bf82015-04-04 21:34:33 +01003521:
353#endif
354 b __errata_finish
355
356__ca15_errata:
357#ifdef CONFIG_ARM_ERRATA_773022
358 cmp r6, #0x4 @ only present up to r0p4
Russell Kingc76f2382015-04-04 21:46:35 +0100359 mrcle p15, 0, r0, c1, c0, 1 @ read aux control register
360 orrle r0, r0, #1 << 1 @ disable loop buffer
361 mcrle p15, 0, r0, c1, c0, 1 @ write aux control register
Russell King17e7bf82015-04-04 21:34:33 +0100362#endif
363 b __errata_finish
364
Gregory CLEMENTde490192012-10-03 11:58:07 +0200365__v7_pj4b_setup:
366#ifdef CONFIG_CPU_PJ4B
367
368/* Auxiliary Debug Modes Control 1 Register */
369#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
370#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
Gregory CLEMENTde490192012-10-03 11:58:07 +0200371#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
372
373/* Auxiliary Debug Modes Control 2 Register */
374#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
375#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
376#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
377#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
378#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
379#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
380 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
381
382/* Auxiliary Functional Modes Control Register 0 */
383#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
384#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
385#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
386
387/* Auxiliary Debug Modes Control 0 Register */
388#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
389
390 /* Auxiliary Debug Modes Control 1 Register */
391 mrc p15, 1, r0, c15, c1, 1
392 orr r0, r0, #PJ4B_CLEAN_LINE
Gregory CLEMENTde490192012-10-03 11:58:07 +0200393 orr r0, r0, #PJ4B_INTER_PARITY
394 bic r0, r0, #PJ4B_STATIC_BP
395 mcr p15, 1, r0, c15, c1, 1
396
397 /* Auxiliary Debug Modes Control 2 Register */
398 mrc p15, 1, r0, c15, c1, 2
399 bic r0, r0, #PJ4B_FAST_LDR
400 orr r0, r0, #PJ4B_AUX_DBG_CTRL2
401 mcr p15, 1, r0, c15, c1, 2
402
403 /* Auxiliary Functional Modes Control Register 0 */
404 mrc p15, 1, r0, c15, c2, 0
405#ifdef CONFIG_SMP
406 orr r0, r0, #PJ4B_SMP_CFB
407#endif
408 orr r0, r0, #PJ4B_L1_PAR_CHK
409 orr r0, r0, #PJ4B_BROADCAST_CACHE
410 mcr p15, 1, r0, c15, c2, 0
411
412 /* Auxiliary Debug Modes Control 0 Register */
413 mrc p15, 1, r0, c15, c1, 0
414 orr r0, r0, #PJ4B_WFI_WFE
415 mcr p15, 1, r0, c15, c1, 0
416
417#endif /* CONFIG_CPU_PJ4B */
418
Daniel Walker14eff182010-09-17 16:42:10 +0100419__v7_setup:
Nicolas Pitreb563d062015-12-04 21:36:40 +0100420 adr r0, __v7_setup_stack_ptr
421 ldr r12, [r0]
422 add r12, r12, r0 @ the local stack
423 stmia r12, {r1-r6, lr} @ v7_invalidate_l1 touches r0-r6
Russell King02b4e272015-05-19 17:06:44 +0100424 bl v7_invalidate_l1
Nicolas Pitreb563d062015-12-04 21:36:40 +0100425 ldmia r12, {r1-r6, lr}
Russell King1946d6e2009-06-01 12:50:33 +0100426
Russell Kingbac51ad2015-07-09 00:30:24 +0100427__v7_setup_cont:
Russell Kingc76f2382015-04-04 21:46:35 +0100428 and r0, r9, #0xff000000 @ ARM?
429 teq r0, #0x41000000
Russell King17e7bf82015-04-04 21:34:33 +0100430 bne __errata_finish
Russell King44194962015-04-04 21:36:35 +0100431 and r3, r9, #0x00f00000 @ variant
432 and r6, r9, #0x0000000f @ revision
Russell Kingb2c3e382015-04-04 20:09:46 +0100433 orr r6, r6, r3, lsr #20-4 @ combine variant and revision
Russell King44194962015-04-04 21:36:35 +0100434 ubfx r0, r9, #4, #12 @ primary part number
Russell King1946d6e2009-06-01 12:50:33 +0100435
Will Deacon64918482010-09-14 09:50:03 +0100436 /* Cortex-A8 Errata */
437 ldr r10, =0x00000c08 @ Cortex-A8 primary part number
438 teq r0, r10
Russell King17e7bf82015-04-04 21:34:33 +0100439 beq __ca8_errata
Russell King1946d6e2009-06-01 12:50:33 +0100440
Will Deacon9f050272010-09-14 09:51:43 +0100441 /* Cortex-A9 Errata */
Russell King17e7bf82015-04-04 21:34:33 +0100442 ldr r10, =0x00000c09 @ Cortex-A9 primary part number
Will Deacon9f050272010-09-14 09:51:43 +0100443 teq r0, r10
Russell King17e7bf82015-04-04 21:34:33 +0100444 beq __ca9_errata
Will Deacon9f050272010-09-14 09:51:43 +0100445
Will Deacon84b65042013-08-20 17:29:55 +0100446 /* Cortex-A15 Errata */
Russell King17e7bf82015-04-04 21:34:33 +0100447 ldr r10, =0x00000c0f @ Cortex-A15 primary part number
Will Deacon84b65042013-08-20 17:29:55 +0100448 teq r0, r10
Russell King17e7bf82015-04-04 21:34:33 +0100449 beq __ca15_errata
Will Deacon84b65042013-08-20 17:29:55 +0100450
Russell King17e7bf82015-04-04 21:34:33 +0100451__errata_finish:
452 mov r10, #0
Catalin Marinasbbe88882007-05-08 22:27:46 +0100453 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100454#ifdef CONFIG_MMU
Catalin Marinasbbe88882007-05-08 22:27:46 +0100455 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
Russell Kingb2c3e382015-04-04 20:09:46 +0100456 v7_ttb_setup r10, r4, r5, r8, r3 @ TTBCR, TTBRx setup
457 ldr r3, =PRRR @ PRRR
Russell Kingf6b0fa02011-02-06 15:48:39 +0000458 ldr r6, =NMRR @ NMRR
Russell Kingb2c3e382015-04-04 20:09:46 +0100459 mcr p15, 0, r3, c10, c2, 0 @ write PRRR
Russell King3f69c0c2008-09-15 17:23:10 +0100460 mcr p15, 0, r6, c10, c2, 1 @ write NMRR
Catalin Marinasbdaaaec2009-07-24 12:35:06 +0100461#endif
Will Deaconbae0ca22014-02-07 19:12:20 +0100462 dsb @ Complete invalidations
Jonathan Austin078c0452012-04-12 17:45:25 +0100463#ifndef CONFIG_ARM_THUMBEE
464 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
465 and r0, r0, #(0xf << 12) @ ThumbEE enabled field
466 teq r0, #(1 << 12) @ check if ThumbEE is present
467 bne 1f
Russell Kingb2c3e382015-04-04 20:09:46 +0100468 mov r3, #0
469 mcr p14, 6, r3, c1, c0, 0 @ Initialize TEEHBR to 0
Jonathan Austin078c0452012-04-12 17:45:25 +0100470 mrc p14, 6, r0, c0, c0, 0 @ load TEECR
471 orr r0, r0, #1 @ set the 1st bit in order to
472 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
4731:
474#endif
Russell Kingb2c3e382015-04-04 20:09:46 +0100475 adr r3, v7_crval
476 ldmia r3, {r3, r6}
Ben Dooks457c2402013-02-12 18:59:57 +0000477 ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables
Leif Lindholm64d2dc32010-09-16 18:00:47 +0100478#ifdef CONFIG_SWP_EMULATE
Russell Kingb2c3e382015-04-04 20:09:46 +0100479 orr r3, r3, #(1 << 10) @ set SW bit in "clear"
Leif Lindholm64d2dc32010-09-16 18:00:47 +0100480 bic r6, r6, #(1 << 10) @ clear it in "mmuset"
481#endif
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100482 mrc p15, 0, r0, c1, c0, 0 @ read control register
Russell Kingb2c3e382015-04-04 20:09:46 +0100483 bic r0, r0, r3 @ clear bits them
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100484 orr r0, r0, r6 @ set them
Catalin Marinas347c8b72009-07-24 12:32:56 +0100485 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
Russell King6ebbf2c2014-06-30 16:29:12 +0100486 ret lr @ return to head.S:__ret
Catalin Marinasbbe88882007-05-08 22:27:46 +0100487
Catalin Marinas8d2cd3a2011-11-22 17:30:28 +0000488 .align 2
Nicolas Pitreb563d062015-12-04 21:36:40 +0100489__v7_setup_stack_ptr:
Russell King8ff97fa2016-02-16 17:33:56 +0000490 .word PHYS_RELATIVE(__v7_setup_stack, .)
Nicolas Pitreb563d062015-12-04 21:36:40 +0100491ENDPROC(__v7_setup)
492
493 .bss
494 .align 2
Catalin Marinasbbe88882007-05-08 22:27:46 +0100495__v7_setup_stack:
Nicolas Pitreb563d062015-12-04 21:36:40 +0100496 .space 4 * 7 @ 7 registers
Catalin Marinasbbe88882007-05-08 22:27:46 +0100497
Russell King5085f3f2010-10-01 15:37:05 +0100498 __INITDATA
499
Dave Martin78a8f3c2011-06-23 17:26:19 +0100500 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
501 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Russell Kinga6d746782015-04-07 15:35:24 +0100502#ifndef CONFIG_ARM_LPAE
503 define_processor_functions ca8, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Shawn Guoddd0c532014-07-16 07:40:53 +0100504 define_processor_functions ca9mp, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Russell Kinga6d746782015-04-07 15:35:24 +0100505#endif
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100506#ifdef CONFIG_CPU_PJ4B
507 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
508#endif
Catalin Marinasbbe88882007-05-08 22:27:46 +0100509
Russell King5085f3f2010-10-01 15:37:05 +0100510 .section ".rodata"
511
Dave Martin78a8f3c2011-06-23 17:26:19 +0100512 string cpu_arch_name, "armv7"
513 string cpu_elf_name, "v7"
Catalin Marinasbbe88882007-05-08 22:27:46 +0100514 .align
515
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100516 .section ".proc.info.init", #alloc
Catalin Marinasbbe88882007-05-08 22:27:46 +0100517
Pawel Molldc939cd2011-05-20 14:39:28 +0100518 /*
519 * Standard v7 proc info content
520 */
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100521.macro __v7_proc name, initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions
Pawel Molldc939cd2011-05-20 14:39:28 +0100522 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000523 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
Pawel Molldc939cd2011-05-20 14:39:28 +0100524 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000525 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
526 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
527 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100528 initfn \initfunc, \name
Daniel Walker14eff182010-09-17 16:42:10 +0100529 .long cpu_arch_name
530 .long cpu_elf_name
Pawel Molldc939cd2011-05-20 14:39:28 +0100531 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
532 HWCAP_EDSP | HWCAP_TLS | \hwcaps
Daniel Walker14eff182010-09-17 16:42:10 +0100533 .long cpu_v7_name
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100534 .long \proc_fns
Daniel Walker14eff182010-09-17 16:42:10 +0100535 .long v7wbi_tlb_fns
536 .long v6_user_fns
537 .long v7_cache_fns
Pawel Molldc939cd2011-05-20 14:39:28 +0100538.endm
539
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000540#ifndef CONFIG_ARM_LPAE
Pawel Molldc939cd2011-05-20 14:39:28 +0100541 /*
Pawel Moll15eb1692011-05-20 14:39:29 +0100542 * ARM Ltd. Cortex A5 processor.
543 */
544 .type __v7_ca5mp_proc_info, #object
545__v7_ca5mp_proc_info:
546 .long 0x410fc050
547 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100548 __v7_proc __v7_ca5mp_proc_info, __v7_ca5mp_setup
Pawel Moll15eb1692011-05-20 14:39:29 +0100549 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
550
551 /*
Pawel Molldc939cd2011-05-20 14:39:28 +0100552 * ARM Ltd. Cortex A9 processor.
553 */
554 .type __v7_ca9mp_proc_info, #object
555__v7_ca9mp_proc_info:
556 .long 0x410fc090
557 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100558 __v7_proc __v7_ca9mp_proc_info, __v7_ca9mp_setup, proc_fns = ca9mp_processor_functions
Daniel Walker14eff182010-09-17 16:42:10 +0100559 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
Gregory CLEMENTde490192012-10-03 11:58:07 +0200560
Russell Kinga6d746782015-04-07 15:35:24 +0100561 /*
562 * ARM Ltd. Cortex A8 processor.
563 */
564 .type __v7_ca8_proc_info, #object
565__v7_ca8_proc_info:
566 .long 0x410fc080
567 .long 0xff0ffff0
568 __v7_proc __v7_ca8_proc_info, __v7_setup, proc_fns = ca8_processor_functions
569 .size __v7_ca8_proc_info, . - __v7_ca8_proc_info
570
Gregory CLEMENTb361d612013-04-09 13:37:20 +0100571#endif /* CONFIG_ARM_LPAE */
572
Gregory CLEMENTde490192012-10-03 11:58:07 +0200573 /*
574 * Marvell PJ4B processor.
575 */
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100576#ifdef CONFIG_CPU_PJ4B
Gregory CLEMENTde490192012-10-03 11:58:07 +0200577 .type __v7_pj4b_proc_info, #object
578__v7_pj4b_proc_info:
Gregory CLEMENT049be072013-06-10 18:05:51 +0100579 .long 0x560f5800
580 .long 0xff0fff00
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100581 __v7_proc __v7_pj4b_proc_info, __v7_pj4b_setup, proc_fns = pj4b_processor_functions
Gregory CLEMENTde490192012-10-03 11:58:07 +0200582 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100583#endif
Daniel Walker14eff182010-09-17 16:42:10 +0100584
Catalin Marinasbbe88882007-05-08 22:27:46 +0100585 /*
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000586 * ARM Ltd. Cortex R7 processor.
587 */
588 .type __v7_cr7mp_proc_info, #object
589__v7_cr7mp_proc_info:
590 .long 0x410fc170
591 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100592 __v7_proc __v7_cr7mp_proc_info, __v7_cr7mp_setup
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000593 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
594
595 /*
Will Deacon868dbf92012-01-20 12:01:14 +0100596 * ARM Ltd. Cortex A7 processor.
597 */
598 .type __v7_ca7mp_proc_info, #object
599__v7_ca7mp_proc_info:
600 .long 0x410fc070
601 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100602 __v7_proc __v7_ca7mp_proc_info, __v7_ca7mp_setup
Will Deacon868dbf92012-01-20 12:01:14 +0100603 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
604
605 /*
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100606 * ARM Ltd. Cortex A12 processor.
607 */
608 .type __v7_ca12mp_proc_info, #object
609__v7_ca12mp_proc_info:
610 .long 0x410fc0d0
611 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100612 __v7_proc __v7_ca12mp_proc_info, __v7_ca12mp_setup
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100613 .size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
614
615 /*
Will Deacon7665d9d2011-01-12 17:10:45 +0000616 * ARM Ltd. Cortex A15 processor.
617 */
618 .type __v7_ca15mp_proc_info, #object
619__v7_ca15mp_proc_info:
620 .long 0x410fc0f0
621 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100622 __v7_proc __v7_ca15mp_proc_info, __v7_ca15mp_setup
Will Deacon7665d9d2011-01-12 17:10:45 +0000623 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
624
625 /*
Marc Carinoc51e78e2014-07-23 00:31:43 +0100626 * Broadcom Corporation Brahma-B15 processor.
627 */
628 .type __v7_b15mp_proc_info, #object
629__v7_b15mp_proc_info:
630 .long 0x420f00f0
631 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100632 __v7_proc __v7_b15mp_proc_info, __v7_b15mp_setup
Marc Carinoc51e78e2014-07-23 00:31:43 +0100633 .size __v7_b15mp_proc_info, . - __v7_b15mp_proc_info
634
635 /*
Will Deaconcd000cf2014-05-02 17:06:02 +0100636 * ARM Ltd. Cortex A17 processor.
637 */
638 .type __v7_ca17mp_proc_info, #object
639__v7_ca17mp_proc_info:
640 .long 0x410fc0e0
641 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100642 __v7_proc __v7_ca17mp_proc_info, __v7_ca17mp_setup
Will Deaconcd000cf2014-05-02 17:06:02 +0100643 .size __v7_ca17mp_proc_info, . - __v7_ca17mp_proc_info
644
645 /*
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100646 * Qualcomm Inc. Krait processors.
647 */
648 .type __krait_proc_info, #object
649__krait_proc_info:
650 .long 0x510f0400 @ Required ID value
651 .long 0xff0ffc00 @ Mask for ID
652 /*
653 * Some Krait processors don't indicate support for SDIV and UDIV
654 * instructions in the ARM instruction set, even though they actually
Stephen Boyd6f0f2a92014-11-10 21:56:40 +0100655 * do support them. They also don't indicate support for fused multiply
656 * instructions even though they actually do support them.
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100657 */
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100658 __v7_proc __krait_proc_info, __v7_setup, hwcaps = HWCAP_IDIV | HWCAP_VFPv4
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100659 .size __krait_proc_info, . - __krait_proc_info
660
661 /*
Catalin Marinasbbe88882007-05-08 22:27:46 +0100662 * Match any ARMv7 processor core.
663 */
664 .type __v7_proc_info, #object
665__v7_proc_info:
666 .long 0x000f0000 @ Required ID value
667 .long 0x000f0000 @ Mask for ID
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100668 __v7_proc __v7_proc_info, __v7_setup
Catalin Marinasbbe88882007-05-08 22:27:46 +0100669 .size __v7_proc_info, . - __v7_proc_info