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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)
Russell Kingde8e71c2011-08-27 22:39:09 +010098 stmfd sp!, {r4 - r10, 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}
Russell Kingde8e71c2011-08-27 22:39:09 +0100115 ldmfd sp!, {r4 - r10, 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 *
Catalin Marinasbbe88882007-05-08 22:27:46 +0100255 * This should be able to cover all ARMv7 cores.
256 *
257 * It is assumed that:
258 * - cache type register is implemented
259 */
Pawel Moll15eb1692011-05-20 14:39:29 +0100260__v7_ca5mp_setup:
Daniel Walker14eff182010-09-17 16:42:10 +0100261__v7_ca9mp_setup:
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000262__v7_cr7mp_setup:
263 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
Will Deacon7665d9d2011-01-12 17:10:45 +0000264 b 1f
Pawel Mollb4244732011-12-09 20:00:39 +0100265__v7_ca7mp_setup:
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100266__v7_ca12mp_setup:
Will Deacon7665d9d2011-01-12 17:10:45 +0000267__v7_ca15mp_setup:
Marc Carinoc51e78e2014-07-23 00:31:43 +0100268__v7_b15mp_setup:
Will Deaconcd000cf2014-05-02 17:06:02 +0100269__v7_ca17mp_setup:
Will Deacon7665d9d2011-01-12 17:10:45 +0000270 mov r10, #0
2711:
Jon Callan73b63ef2008-11-06 13:23:09 +0000272#ifdef CONFIG_SMP
Russell Kingf00ec482010-09-04 10:47:48 +0100273 ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
274 ALT_UP(mov r0, #(1 << 6)) @ fake it for UP
Tony Thompson1b3a02eb2009-11-04 12:16:38 +0000275 tst r0, #(1 << 6) @ SMP/nAMP mode enabled?
Will Deacon7665d9d2011-01-12 17:10:45 +0000276 orreq r0, r0, #(1 << 6) @ Enable SMP/nAMP mode
277 orreq r0, r0, r10 @ Enable CPU-specific SMP bits
278 mcreq p15, 0, r0, c1, c0, 1
Jon Callan73b63ef2008-11-06 13:23:09 +0000279#endif
Haojian Zhuangd106de32013-01-05 13:57:38 +0100280 b __v7_setup
Gregory CLEMENTde490192012-10-03 11:58:07 +0200281
282__v7_pj4b_setup:
283#ifdef CONFIG_CPU_PJ4B
284
285/* Auxiliary Debug Modes Control 1 Register */
286#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
287#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
Gregory CLEMENTde490192012-10-03 11:58:07 +0200288#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
289
290/* Auxiliary Debug Modes Control 2 Register */
291#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
292#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
293#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
294#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
295#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
296#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
297 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
298
299/* Auxiliary Functional Modes Control Register 0 */
300#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
301#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
302#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
303
304/* Auxiliary Debug Modes Control 0 Register */
305#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
306
307 /* Auxiliary Debug Modes Control 1 Register */
308 mrc p15, 1, r0, c15, c1, 1
309 orr r0, r0, #PJ4B_CLEAN_LINE
Gregory CLEMENTde490192012-10-03 11:58:07 +0200310 orr r0, r0, #PJ4B_INTER_PARITY
311 bic r0, r0, #PJ4B_STATIC_BP
312 mcr p15, 1, r0, c15, c1, 1
313
314 /* Auxiliary Debug Modes Control 2 Register */
315 mrc p15, 1, r0, c15, c1, 2
316 bic r0, r0, #PJ4B_FAST_LDR
317 orr r0, r0, #PJ4B_AUX_DBG_CTRL2
318 mcr p15, 1, r0, c15, c1, 2
319
320 /* Auxiliary Functional Modes Control Register 0 */
321 mrc p15, 1, r0, c15, c2, 0
322#ifdef CONFIG_SMP
323 orr r0, r0, #PJ4B_SMP_CFB
324#endif
325 orr r0, r0, #PJ4B_L1_PAR_CHK
326 orr r0, r0, #PJ4B_BROADCAST_CACHE
327 mcr p15, 1, r0, c15, c2, 0
328
329 /* Auxiliary Debug Modes Control 0 Register */
330 mrc p15, 1, r0, c15, c1, 0
331 orr r0, r0, #PJ4B_WFI_WFE
332 mcr p15, 1, r0, c15, c1, 0
333
334#endif /* CONFIG_CPU_PJ4B */
335
Daniel Walker14eff182010-09-17 16:42:10 +0100336__v7_setup:
Catalin Marinasbbe88882007-05-08 22:27:46 +0100337 adr r12, __v7_setup_stack @ the local stack
338 stmia r12, {r0-r5, r7, r9, r11, lr}
Russell King02b4e272015-05-19 17:06:44 +0100339 bl v7_invalidate_l1
Catalin Marinasbbe88882007-05-08 22:27:46 +0100340 ldmia r12, {r0-r5, r7, r9, r11, lr}
Russell King1946d6e2009-06-01 12:50:33 +0100341
342 mrc p15, 0, r0, c0, c0, 0 @ read main ID register
343 and r10, r0, #0xff000000 @ ARM?
344 teq r10, #0x41000000
Will Deacon9f050272010-09-14 09:51:43 +0100345 bne 3f
Russell King1946d6e2009-06-01 12:50:33 +0100346 and r5, r0, #0x00f00000 @ variant
347 and r6, r0, #0x0000000f @ revision
Will Deacon64918482010-09-14 09:50:03 +0100348 orr r6, r6, r5, lsr #20-4 @ combine variant and revision
349 ubfx r0, r0, #4, #12 @ primary part number
Russell King1946d6e2009-06-01 12:50:33 +0100350
Will Deacon64918482010-09-14 09:50:03 +0100351 /* Cortex-A8 Errata */
352 ldr r10, =0x00000c08 @ Cortex-A8 primary part number
353 teq r0, r10
354 bne 2f
Rob Herring62e4d352012-12-21 22:42:40 +0100355#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
356
Russell King1946d6e2009-06-01 12:50:33 +0100357 teq r5, #0x00100000 @ only present in r1p*
358 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
359 orreq r10, r10, #(1 << 6) @ set IBE to 1
360 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100361#endif
Catalin Marinas855c5512009-04-30 17:06:15 +0100362#ifdef CONFIG_ARM_ERRATA_458693
Will Deacon64918482010-09-14 09:50:03 +0100363 teq r6, #0x20 @ only present in r2p0
Russell King1946d6e2009-06-01 12:50:33 +0100364 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
365 orreq r10, r10, #(1 << 5) @ set L1NEON to 1
366 orreq r10, r10, #(1 << 9) @ set PLDNOP to 1
367 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
Catalin Marinas855c5512009-04-30 17:06:15 +0100368#endif
Catalin Marinas0516e462009-04-30 17:06:20 +0100369#ifdef CONFIG_ARM_ERRATA_460075
Will Deacon64918482010-09-14 09:50:03 +0100370 teq r6, #0x20 @ only present in r2p0
Russell King1946d6e2009-06-01 12:50:33 +0100371 mrceq p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register
372 tsteq r10, #1 << 22
373 orreq r10, r10, #(1 << 22) @ set the Write Allocate disable bit
374 mcreq p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register
Catalin Marinas0516e462009-04-30 17:06:20 +0100375#endif
Will Deacon9f050272010-09-14 09:51:43 +0100376 b 3f
Russell King1946d6e2009-06-01 12:50:33 +0100377
Will Deacon9f050272010-09-14 09:51:43 +0100378 /* Cortex-A9 Errata */
3792: ldr r10, =0x00000c09 @ Cortex-A9 primary part number
380 teq r0, r10
381 bne 3f
382#ifdef CONFIG_ARM_ERRATA_742230
383 cmp r6, #0x22 @ only present up to r2p2
384 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
385 orrle r10, r10, #1 << 4 @ set bit #4
386 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
387#endif
Will Deacona672e992010-09-14 09:53:02 +0100388#ifdef CONFIG_ARM_ERRATA_742231
389 teq r6, #0x20 @ present in r2p0
390 teqne r6, #0x21 @ present in r2p1
391 teqne r6, #0x22 @ present in r2p2
392 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
393 orreq r10, r10, #1 << 12 @ set bit #12
394 orreq r10, r10, #1 << 22 @ set bit #22
395 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
396#endif
Will Deacon475d92f2010-09-28 14:02:02 +0100397#ifdef CONFIG_ARM_ERRATA_743622
Will Deaconefbc74a2012-02-24 12:12:38 +0100398 teq r5, #0x00200000 @ only present in r2p*
Will Deacon475d92f2010-09-28 14:02:02 +0100399 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
400 orreq r10, r10, #1 << 6 @ set bit #6
401 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
402#endif
Dave Martinba90c512011-12-08 13:41:06 +0100403#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
404 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
405 ALT_UP_B(1f)
Will Deacon9a27c272011-02-18 16:36:35 +0100406 mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register
407 orrlt r10, r10, #1 << 11 @ set bit #11
408 mcrlt p15, 0, r10, c15, c0, 1 @ write diagnostic register
Dave Martinba90c512011-12-08 13:41:06 +01004091:
Will Deacon9a27c272011-02-18 16:36:35 +0100410#endif
Will Deacon9f050272010-09-14 09:51:43 +0100411
Will Deacon84b65042013-08-20 17:29:55 +0100412 /* Cortex-A15 Errata */
4133: ldr r10, =0x00000c0f @ Cortex-A15 primary part number
414 teq r0, r10
415 bne 4f
416
417#ifdef CONFIG_ARM_ERRATA_773022
418 cmp r6, #0x4 @ only present up to r0p4
419 mrcle p15, 0, r10, c1, c0, 1 @ read aux control register
420 orrle r10, r10, #1 << 1 @ disable loop buffer
421 mcrle p15, 0, r10, c1, c0, 1 @ write aux control register
422#endif
423
4244: mov r10, #0
Catalin Marinasbbe88882007-05-08 22:27:46 +0100425 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100426#ifdef CONFIG_MMU
Catalin Marinasbbe88882007-05-08 22:27:46 +0100427 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
Catalin Marinas8d2cd3a2011-11-22 17:30:28 +0000428 v7_ttb_setup r10, r4, r8, r5 @ TTBCR, TTBRx setup
Russell Kingf6b0fa02011-02-06 15:48:39 +0000429 ldr r5, =PRRR @ PRRR
430 ldr r6, =NMRR @ NMRR
Russell King3f69c0c2008-09-15 17:23:10 +0100431 mcr p15, 0, r5, c10, c2, 0 @ write PRRR
432 mcr p15, 0, r6, c10, c2, 1 @ write NMRR
Catalin Marinasbdaaaec2009-07-24 12:35:06 +0100433#endif
Will Deaconbae0ca22014-02-07 19:12:20 +0100434 dsb @ Complete invalidations
Jonathan Austin078c0452012-04-12 17:45:25 +0100435#ifndef CONFIG_ARM_THUMBEE
436 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
437 and r0, r0, #(0xf << 12) @ ThumbEE enabled field
438 teq r0, #(1 << 12) @ check if ThumbEE is present
439 bne 1f
440 mov r5, #0
441 mcr p14, 6, r5, c1, c0, 0 @ Initialize TEEHBR to 0
442 mrc p14, 6, r0, c0, c0, 0 @ load TEECR
443 orr r0, r0, #1 @ set the 1st bit in order to
444 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
4451:
446#endif
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100447 adr r5, v7_crval
448 ldmia r5, {r5, r6}
Ben Dooks457c2402013-02-12 18:59:57 +0000449 ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables
Leif Lindholm64d2dc32010-09-16 18:00:47 +0100450#ifdef CONFIG_SWP_EMULATE
451 orr r5, r5, #(1 << 10) @ set SW bit in "clear"
452 bic r6, r6, #(1 << 10) @ clear it in "mmuset"
453#endif
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100454 mrc p15, 0, r0, c1, c0, 0 @ read control register
455 bic r0, r0, r5 @ clear bits them
456 orr r0, r0, r6 @ set them
Catalin Marinas347c8b72009-07-24 12:32:56 +0100457 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
Russell King6ebbf2c2014-06-30 16:29:12 +0100458 ret lr @ return to head.S:__ret
Catalin Marinas93ed3972008-08-28 11:22:32 +0100459ENDPROC(__v7_setup)
Catalin Marinasbbe88882007-05-08 22:27:46 +0100460
Catalin Marinas8d2cd3a2011-11-22 17:30:28 +0000461 .align 2
Catalin Marinasbbe88882007-05-08 22:27:46 +0100462__v7_setup_stack:
463 .space 4 * 11 @ 11 registers
464
Russell King5085f3f2010-10-01 15:37:05 +0100465 __INITDATA
466
Dave Martin78a8f3c2011-06-23 17:26:19 +0100467 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
468 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Russell Kinga6d746782015-04-07 15:35:24 +0100469#ifndef CONFIG_ARM_LPAE
470 define_processor_functions ca8, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Shawn Guoddd0c532014-07-16 07:40:53 +0100471 define_processor_functions ca9mp, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Russell Kinga6d746782015-04-07 15:35:24 +0100472#endif
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100473#ifdef CONFIG_CPU_PJ4B
474 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
475#endif
Catalin Marinasbbe88882007-05-08 22:27:46 +0100476
Russell King5085f3f2010-10-01 15:37:05 +0100477 .section ".rodata"
478
Dave Martin78a8f3c2011-06-23 17:26:19 +0100479 string cpu_arch_name, "armv7"
480 string cpu_elf_name, "v7"
Catalin Marinasbbe88882007-05-08 22:27:46 +0100481 .align
482
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100483 .section ".proc.info.init", #alloc
Catalin Marinasbbe88882007-05-08 22:27:46 +0100484
Pawel Molldc939cd2011-05-20 14:39:28 +0100485 /*
486 * Standard v7 proc info content
487 */
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100488.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 +0100489 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000490 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
Pawel Molldc939cd2011-05-20 14:39:28 +0100491 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000492 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
493 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
494 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100495 initfn \initfunc, \name
Daniel Walker14eff182010-09-17 16:42:10 +0100496 .long cpu_arch_name
497 .long cpu_elf_name
Pawel Molldc939cd2011-05-20 14:39:28 +0100498 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
499 HWCAP_EDSP | HWCAP_TLS | \hwcaps
Daniel Walker14eff182010-09-17 16:42:10 +0100500 .long cpu_v7_name
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100501 .long \proc_fns
Daniel Walker14eff182010-09-17 16:42:10 +0100502 .long v7wbi_tlb_fns
503 .long v6_user_fns
504 .long v7_cache_fns
Pawel Molldc939cd2011-05-20 14:39:28 +0100505.endm
506
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000507#ifndef CONFIG_ARM_LPAE
Pawel Molldc939cd2011-05-20 14:39:28 +0100508 /*
Pawel Moll15eb1692011-05-20 14:39:29 +0100509 * ARM Ltd. Cortex A5 processor.
510 */
511 .type __v7_ca5mp_proc_info, #object
512__v7_ca5mp_proc_info:
513 .long 0x410fc050
514 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100515 __v7_proc __v7_ca5mp_proc_info, __v7_ca5mp_setup
Pawel Moll15eb1692011-05-20 14:39:29 +0100516 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
517
518 /*
Pawel Molldc939cd2011-05-20 14:39:28 +0100519 * ARM Ltd. Cortex A9 processor.
520 */
521 .type __v7_ca9mp_proc_info, #object
522__v7_ca9mp_proc_info:
523 .long 0x410fc090
524 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100525 __v7_proc __v7_ca9mp_proc_info, __v7_ca9mp_setup, proc_fns = ca9mp_processor_functions
Daniel Walker14eff182010-09-17 16:42:10 +0100526 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
Gregory CLEMENTde490192012-10-03 11:58:07 +0200527
Russell Kinga6d746782015-04-07 15:35:24 +0100528 /*
529 * ARM Ltd. Cortex A8 processor.
530 */
531 .type __v7_ca8_proc_info, #object
532__v7_ca8_proc_info:
533 .long 0x410fc080
534 .long 0xff0ffff0
535 __v7_proc __v7_ca8_proc_info, __v7_setup, proc_fns = ca8_processor_functions
536 .size __v7_ca8_proc_info, . - __v7_ca8_proc_info
537
Gregory CLEMENTb361d612013-04-09 13:37:20 +0100538#endif /* CONFIG_ARM_LPAE */
539
Gregory CLEMENTde490192012-10-03 11:58:07 +0200540 /*
541 * Marvell PJ4B processor.
542 */
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100543#ifdef CONFIG_CPU_PJ4B
Gregory CLEMENTde490192012-10-03 11:58:07 +0200544 .type __v7_pj4b_proc_info, #object
545__v7_pj4b_proc_info:
Gregory CLEMENT049be072013-06-10 18:05:51 +0100546 .long 0x560f5800
547 .long 0xff0fff00
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100548 __v7_proc __v7_pj4b_proc_info, __v7_pj4b_setup, proc_fns = pj4b_processor_functions
Gregory CLEMENTde490192012-10-03 11:58:07 +0200549 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100550#endif
Daniel Walker14eff182010-09-17 16:42:10 +0100551
Catalin Marinasbbe88882007-05-08 22:27:46 +0100552 /*
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000553 * ARM Ltd. Cortex R7 processor.
554 */
555 .type __v7_cr7mp_proc_info, #object
556__v7_cr7mp_proc_info:
557 .long 0x410fc170
558 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100559 __v7_proc __v7_cr7mp_proc_info, __v7_cr7mp_setup
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000560 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
561
562 /*
Will Deacon868dbf92012-01-20 12:01:14 +0100563 * ARM Ltd. Cortex A7 processor.
564 */
565 .type __v7_ca7mp_proc_info, #object
566__v7_ca7mp_proc_info:
567 .long 0x410fc070
568 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100569 __v7_proc __v7_ca7mp_proc_info, __v7_ca7mp_setup
Will Deacon868dbf92012-01-20 12:01:14 +0100570 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
571
572 /*
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100573 * ARM Ltd. Cortex A12 processor.
574 */
575 .type __v7_ca12mp_proc_info, #object
576__v7_ca12mp_proc_info:
577 .long 0x410fc0d0
578 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100579 __v7_proc __v7_ca12mp_proc_info, __v7_ca12mp_setup
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100580 .size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
581
582 /*
Will Deacon7665d9d2011-01-12 17:10:45 +0000583 * ARM Ltd. Cortex A15 processor.
584 */
585 .type __v7_ca15mp_proc_info, #object
586__v7_ca15mp_proc_info:
587 .long 0x410fc0f0
588 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100589 __v7_proc __v7_ca15mp_proc_info, __v7_ca15mp_setup
Will Deacon7665d9d2011-01-12 17:10:45 +0000590 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
591
592 /*
Marc Carinoc51e78e2014-07-23 00:31:43 +0100593 * Broadcom Corporation Brahma-B15 processor.
594 */
595 .type __v7_b15mp_proc_info, #object
596__v7_b15mp_proc_info:
597 .long 0x420f00f0
598 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100599 __v7_proc __v7_b15mp_proc_info, __v7_b15mp_setup
Marc Carinoc51e78e2014-07-23 00:31:43 +0100600 .size __v7_b15mp_proc_info, . - __v7_b15mp_proc_info
601
602 /*
Will Deaconcd000cf2014-05-02 17:06:02 +0100603 * ARM Ltd. Cortex A17 processor.
604 */
605 .type __v7_ca17mp_proc_info, #object
606__v7_ca17mp_proc_info:
607 .long 0x410fc0e0
608 .long 0xff0ffff0
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100609 __v7_proc __v7_ca17mp_proc_info, __v7_ca17mp_setup
Will Deaconcd000cf2014-05-02 17:06:02 +0100610 .size __v7_ca17mp_proc_info, . - __v7_ca17mp_proc_info
611
612 /*
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100613 * Qualcomm Inc. Krait processors.
614 */
615 .type __krait_proc_info, #object
616__krait_proc_info:
617 .long 0x510f0400 @ Required ID value
618 .long 0xff0ffc00 @ Mask for ID
619 /*
620 * Some Krait processors don't indicate support for SDIV and UDIV
621 * instructions in the ARM instruction set, even though they actually
Stephen Boyd6f0f2a92014-11-10 21:56:40 +0100622 * do support them. They also don't indicate support for fused multiply
623 * instructions even though they actually do support them.
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100624 */
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100625 __v7_proc __krait_proc_info, __v7_setup, hwcaps = HWCAP_IDIV | HWCAP_VFPv4
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100626 .size __krait_proc_info, . - __krait_proc_info
627
628 /*
Catalin Marinasbbe88882007-05-08 22:27:46 +0100629 * Match any ARMv7 processor core.
630 */
631 .type __v7_proc_info, #object
632__v7_proc_info:
633 .long 0x000f0000 @ Required ID value
634 .long 0x000f0000 @ Mask for ID
Ard Biesheuvelbf357062015-03-18 07:29:32 +0100635 __v7_proc __v7_proc_info, __v7_setup
Catalin Marinasbbe88882007-05-08 22:27:46 +0100636 .size __v7_proc_info, . - __v7_proc_info