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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)
29 mov pc, 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 King9ca03a22010-07-26 12:22:12 +010037 mov pc, 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
Catalin Marinasbbe88882007-05-08 22:27:46 +010074 mov pc, 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)
80 mov pc, lr
811: 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
Catalin Marinasbbe88882007-05-08 22:27:46 +010087 mov pc, 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
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100155#ifdef CONFIG_CPU_PJ4B
156 globl_equ cpu_pj4b_switch_mm, cpu_v7_switch_mm
157 globl_equ cpu_pj4b_set_pte_ext, cpu_v7_set_pte_ext
158 globl_equ cpu_pj4b_proc_init, cpu_v7_proc_init
159 globl_equ cpu_pj4b_proc_fin, cpu_v7_proc_fin
160 globl_equ cpu_pj4b_reset, cpu_v7_reset
161#ifdef CONFIG_PJ4B_ERRATA_4742
162ENTRY(cpu_pj4b_do_idle)
163 dsb @ WFI may enter a low-power mode
164 wfi
165 dsb @barrier
166 mov pc, lr
167ENDPROC(cpu_pj4b_do_idle)
168#else
169 globl_equ cpu_pj4b_do_idle, cpu_v7_do_idle
170#endif
171 globl_equ cpu_pj4b_dcache_clean_area, cpu_v7_dcache_clean_area
Gregory CLEMENT16c79a32014-03-28 12:21:16 +0100172#ifdef CONFIG_ARM_CPU_SUSPEND
173ENTRY(cpu_pj4b_do_suspend)
174 stmfd sp!, {r6 - r10}
175 mrc p15, 1, r6, c15, c1, 0 @ save CP15 - extra features
176 mrc p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0
177 mrc p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2
178 mrc p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1
179 mrc p15, 0, r10, c9, c14, 0 @ save CP15 - PMC
180 stmia r0!, {r6 - r10}
181 ldmfd sp!, {r6 - r10}
182 b cpu_v7_do_suspend
183ENDPROC(cpu_pj4b_do_suspend)
184
185ENTRY(cpu_pj4b_do_resume)
186 ldmia r0!, {r6 - r10}
187 mcr p15, 1, r6, c15, c1, 0 @ save CP15 - extra features
188 mcr p15, 1, r7, c15, c2, 0 @ save CP15 - Aux Func Modes Ctrl 0
189 mcr p15, 1, r8, c15, c1, 2 @ save CP15 - Aux Debug Modes Ctrl 2
190 mcr p15, 1, r9, c15, c1, 1 @ save CP15 - Aux Debug Modes Ctrl 1
191 mcr p15, 0, r10, c9, c14, 0 @ save CP15 - PMC
192 b cpu_v7_do_resume
193ENDPROC(cpu_pj4b_do_resume)
194#endif
195.globl cpu_pj4b_suspend_size
196.equ cpu_pj4b_suspend_size, 4 * 14
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100197
198#endif
199
Catalin Marinasbbe88882007-05-08 22:27:46 +0100200/*
201 * __v7_setup
202 *
203 * Initialise TLB, Caches, and MMU state ready to switch the MMU
204 * on. Return in r0 the new CP15 C1 control register setting.
205 *
Catalin Marinasbbe88882007-05-08 22:27:46 +0100206 * This should be able to cover all ARMv7 cores.
207 *
208 * It is assumed that:
209 * - cache type register is implemented
210 */
Pawel Moll15eb1692011-05-20 14:39:29 +0100211__v7_ca5mp_setup:
Daniel Walker14eff182010-09-17 16:42:10 +0100212__v7_ca9mp_setup:
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000213__v7_cr7mp_setup:
214 mov r10, #(1 << 0) @ Cache/TLB ops broadcasting
Will Deacon7665d9d2011-01-12 17:10:45 +0000215 b 1f
Pawel Mollb4244732011-12-09 20:00:39 +0100216__v7_ca7mp_setup:
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100217__v7_ca12mp_setup:
Will Deacon7665d9d2011-01-12 17:10:45 +0000218__v7_ca15mp_setup:
Will Deaconcd000cf2014-05-02 17:06:02 +0100219__v7_ca17mp_setup:
Will Deacon7665d9d2011-01-12 17:10:45 +0000220 mov r10, #0
2211:
Jon Callan73b63ef2008-11-06 13:23:09 +0000222#ifdef CONFIG_SMP
Russell Kingf00ec482010-09-04 10:47:48 +0100223 ALT_SMP(mrc p15, 0, r0, c1, c0, 1)
224 ALT_UP(mov r0, #(1 << 6)) @ fake it for UP
Tony Thompson1b3a02eb2009-11-04 12:16:38 +0000225 tst r0, #(1 << 6) @ SMP/nAMP mode enabled?
Will Deacon7665d9d2011-01-12 17:10:45 +0000226 orreq r0, r0, #(1 << 6) @ Enable SMP/nAMP mode
227 orreq r0, r0, r10 @ Enable CPU-specific SMP bits
228 mcreq p15, 0, r0, c1, c0, 1
Jon Callan73b63ef2008-11-06 13:23:09 +0000229#endif
Haojian Zhuangd106de32013-01-05 13:57:38 +0100230 b __v7_setup
Gregory CLEMENTde490192012-10-03 11:58:07 +0200231
232__v7_pj4b_setup:
233#ifdef CONFIG_CPU_PJ4B
234
235/* Auxiliary Debug Modes Control 1 Register */
236#define PJ4B_STATIC_BP (1 << 2) /* Enable Static BP */
237#define PJ4B_INTER_PARITY (1 << 8) /* Disable Internal Parity Handling */
238#define PJ4B_BCK_OFF_STREX (1 << 5) /* Enable the back off of STREX instr */
239#define PJ4B_CLEAN_LINE (1 << 16) /* Disable data transfer for clean line */
240
241/* Auxiliary Debug Modes Control 2 Register */
242#define PJ4B_FAST_LDR (1 << 23) /* Disable fast LDR */
243#define PJ4B_SNOOP_DATA (1 << 25) /* Do not interleave write and snoop data */
244#define PJ4B_CWF (1 << 27) /* Disable Critical Word First feature */
245#define PJ4B_OUTSDNG_NC (1 << 29) /* Disable outstanding non cacheable rqst */
246#define PJ4B_L1_REP_RR (1 << 30) /* L1 replacement - Strict round robin */
247#define PJ4B_AUX_DBG_CTRL2 (PJ4B_SNOOP_DATA | PJ4B_CWF |\
248 PJ4B_OUTSDNG_NC | PJ4B_L1_REP_RR)
249
250/* Auxiliary Functional Modes Control Register 0 */
251#define PJ4B_SMP_CFB (1 << 1) /* Set SMP mode. Join the coherency fabric */
252#define PJ4B_L1_PAR_CHK (1 << 2) /* Support L1 parity checking */
253#define PJ4B_BROADCAST_CACHE (1 << 8) /* Broadcast Cache and TLB maintenance */
254
255/* Auxiliary Debug Modes Control 0 Register */
256#define PJ4B_WFI_WFE (1 << 22) /* WFI/WFE - serve the DVM and back to idle */
257
258 /* Auxiliary Debug Modes Control 1 Register */
259 mrc p15, 1, r0, c15, c1, 1
260 orr r0, r0, #PJ4B_CLEAN_LINE
261 orr r0, r0, #PJ4B_BCK_OFF_STREX
262 orr r0, r0, #PJ4B_INTER_PARITY
263 bic r0, r0, #PJ4B_STATIC_BP
264 mcr p15, 1, r0, c15, c1, 1
265
266 /* Auxiliary Debug Modes Control 2 Register */
267 mrc p15, 1, r0, c15, c1, 2
268 bic r0, r0, #PJ4B_FAST_LDR
269 orr r0, r0, #PJ4B_AUX_DBG_CTRL2
270 mcr p15, 1, r0, c15, c1, 2
271
272 /* Auxiliary Functional Modes Control Register 0 */
273 mrc p15, 1, r0, c15, c2, 0
274#ifdef CONFIG_SMP
275 orr r0, r0, #PJ4B_SMP_CFB
276#endif
277 orr r0, r0, #PJ4B_L1_PAR_CHK
278 orr r0, r0, #PJ4B_BROADCAST_CACHE
279 mcr p15, 1, r0, c15, c2, 0
280
281 /* Auxiliary Debug Modes Control 0 Register */
282 mrc p15, 1, r0, c15, c1, 0
283 orr r0, r0, #PJ4B_WFI_WFE
284 mcr p15, 1, r0, c15, c1, 0
285
286#endif /* CONFIG_CPU_PJ4B */
287
Daniel Walker14eff182010-09-17 16:42:10 +0100288__v7_setup:
Catalin Marinasbbe88882007-05-08 22:27:46 +0100289 adr r12, __v7_setup_stack @ the local stack
290 stmia r12, {r0-r5, r7, r9, r11, lr}
Santosh Shilimkar6323fa22012-09-10 15:07:26 +0530291 bl v7_flush_dcache_louis
Catalin Marinasbbe88882007-05-08 22:27:46 +0100292 ldmia r12, {r0-r5, r7, r9, r11, lr}
Russell King1946d6e2009-06-01 12:50:33 +0100293
294 mrc p15, 0, r0, c0, c0, 0 @ read main ID register
295 and r10, r0, #0xff000000 @ ARM?
296 teq r10, #0x41000000
Will Deacon9f050272010-09-14 09:51:43 +0100297 bne 3f
Russell King1946d6e2009-06-01 12:50:33 +0100298 and r5, r0, #0x00f00000 @ variant
299 and r6, r0, #0x0000000f @ revision
Will Deacon64918482010-09-14 09:50:03 +0100300 orr r6, r6, r5, lsr #20-4 @ combine variant and revision
301 ubfx r0, r0, #4, #12 @ primary part number
Russell King1946d6e2009-06-01 12:50:33 +0100302
Will Deacon64918482010-09-14 09:50:03 +0100303 /* Cortex-A8 Errata */
304 ldr r10, =0x00000c08 @ Cortex-A8 primary part number
305 teq r0, r10
306 bne 2f
Rob Herring62e4d352012-12-21 22:42:40 +0100307#if defined(CONFIG_ARM_ERRATA_430973) && !defined(CONFIG_ARCH_MULTIPLATFORM)
308
Russell King1946d6e2009-06-01 12:50:33 +0100309 teq r5, #0x00100000 @ only present in r1p*
310 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
311 orreq r10, r10, #(1 << 6) @ set IBE to 1
312 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
Catalin Marinas7ce236f2009-04-30 17:06:09 +0100313#endif
Catalin Marinas855c5512009-04-30 17:06:15 +0100314#ifdef CONFIG_ARM_ERRATA_458693
Will Deacon64918482010-09-14 09:50:03 +0100315 teq r6, #0x20 @ only present in r2p0
Russell King1946d6e2009-06-01 12:50:33 +0100316 mrceq p15, 0, r10, c1, c0, 1 @ read aux control register
317 orreq r10, r10, #(1 << 5) @ set L1NEON to 1
318 orreq r10, r10, #(1 << 9) @ set PLDNOP to 1
319 mcreq p15, 0, r10, c1, c0, 1 @ write aux control register
Catalin Marinas855c5512009-04-30 17:06:15 +0100320#endif
Catalin Marinas0516e462009-04-30 17:06:20 +0100321#ifdef CONFIG_ARM_ERRATA_460075
Will Deacon64918482010-09-14 09:50:03 +0100322 teq r6, #0x20 @ only present in r2p0
Russell King1946d6e2009-06-01 12:50:33 +0100323 mrceq p15, 1, r10, c9, c0, 2 @ read L2 cache aux ctrl register
324 tsteq r10, #1 << 22
325 orreq r10, r10, #(1 << 22) @ set the Write Allocate disable bit
326 mcreq p15, 1, r10, c9, c0, 2 @ write the L2 cache aux ctrl register
Catalin Marinas0516e462009-04-30 17:06:20 +0100327#endif
Will Deacon9f050272010-09-14 09:51:43 +0100328 b 3f
Russell King1946d6e2009-06-01 12:50:33 +0100329
Will Deacon9f050272010-09-14 09:51:43 +0100330 /* Cortex-A9 Errata */
3312: ldr r10, =0x00000c09 @ Cortex-A9 primary part number
332 teq r0, r10
333 bne 3f
334#ifdef CONFIG_ARM_ERRATA_742230
335 cmp r6, #0x22 @ only present up to r2p2
336 mrcle p15, 0, r10, c15, c0, 1 @ read diagnostic register
337 orrle r10, r10, #1 << 4 @ set bit #4
338 mcrle p15, 0, r10, c15, c0, 1 @ write diagnostic register
339#endif
Will Deacona672e992010-09-14 09:53:02 +0100340#ifdef CONFIG_ARM_ERRATA_742231
341 teq r6, #0x20 @ present in r2p0
342 teqne r6, #0x21 @ present in r2p1
343 teqne r6, #0x22 @ present in r2p2
344 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
345 orreq r10, r10, #1 << 12 @ set bit #12
346 orreq r10, r10, #1 << 22 @ set bit #22
347 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
348#endif
Will Deacon475d92f2010-09-28 14:02:02 +0100349#ifdef CONFIG_ARM_ERRATA_743622
Will Deaconefbc74a2012-02-24 12:12:38 +0100350 teq r5, #0x00200000 @ only present in r2p*
Will Deacon475d92f2010-09-28 14:02:02 +0100351 mrceq p15, 0, r10, c15, c0, 1 @ read diagnostic register
352 orreq r10, r10, #1 << 6 @ set bit #6
353 mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
354#endif
Dave Martinba90c512011-12-08 13:41:06 +0100355#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
356 ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
357 ALT_UP_B(1f)
Will Deacon9a27c272011-02-18 16:36:35 +0100358 mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register
359 orrlt r10, r10, #1 << 11 @ set bit #11
360 mcrlt p15, 0, r10, c15, c0, 1 @ write diagnostic register
Dave Martinba90c512011-12-08 13:41:06 +01003611:
Will Deacon9a27c272011-02-18 16:36:35 +0100362#endif
Will Deacon9f050272010-09-14 09:51:43 +0100363
Will Deacon84b65042013-08-20 17:29:55 +0100364 /* Cortex-A15 Errata */
3653: ldr r10, =0x00000c0f @ Cortex-A15 primary part number
366 teq r0, r10
367 bne 4f
368
369#ifdef CONFIG_ARM_ERRATA_773022
370 cmp r6, #0x4 @ only present up to r0p4
371 mrcle p15, 0, r10, c1, c0, 1 @ read aux control register
372 orrle r10, r10, #1 << 1 @ disable loop buffer
373 mcrle p15, 0, r10, c1, c0, 1 @ write aux control register
374#endif
375
3764: mov r10, #0
Catalin Marinasbbe88882007-05-08 22:27:46 +0100377 mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100378#ifdef CONFIG_MMU
Catalin Marinasbbe88882007-05-08 22:27:46 +0100379 mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
Catalin Marinas8d2cd3a2011-11-22 17:30:28 +0000380 v7_ttb_setup r10, r4, r8, r5 @ TTBCR, TTBRx setup
Russell Kingf6b0fa02011-02-06 15:48:39 +0000381 ldr r5, =PRRR @ PRRR
382 ldr r6, =NMRR @ NMRR
Russell King3f69c0c2008-09-15 17:23:10 +0100383 mcr p15, 0, r5, c10, c2, 0 @ write PRRR
384 mcr p15, 0, r6, c10, c2, 1 @ write NMRR
Catalin Marinasbdaaaec2009-07-24 12:35:06 +0100385#endif
Will Deaconbae0ca22014-02-07 19:12:20 +0100386 dsb @ Complete invalidations
Jonathan Austin078c0452012-04-12 17:45:25 +0100387#ifndef CONFIG_ARM_THUMBEE
388 mrc p15, 0, r0, c0, c1, 0 @ read ID_PFR0 for ThumbEE
389 and r0, r0, #(0xf << 12) @ ThumbEE enabled field
390 teq r0, #(1 << 12) @ check if ThumbEE is present
391 bne 1f
392 mov r5, #0
393 mcr p14, 6, r5, c1, c0, 0 @ Initialize TEEHBR to 0
394 mrc p14, 6, r0, c0, c0, 0 @ load TEECR
395 orr r0, r0, #1 @ set the 1st bit in order to
396 mcr p14, 6, r0, c0, c0, 0 @ stop userspace TEEHBR access
3971:
398#endif
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100399 adr r5, v7_crval
400 ldmia r5, {r5, r6}
Ben Dooks457c2402013-02-12 18:59:57 +0000401 ARM_BE8(orr r6, r6, #1 << 25) @ big-endian page tables
Leif Lindholm64d2dc32010-09-16 18:00:47 +0100402#ifdef CONFIG_SWP_EMULATE
403 orr r5, r5, #(1 << 10) @ set SW bit in "clear"
404 bic r6, r6, #(1 << 10) @ clear it in "mmuset"
405#endif
Catalin Marinas2eb8c822007-07-20 11:43:02 +0100406 mrc p15, 0, r0, c1, c0, 0 @ read control register
407 bic r0, r0, r5 @ clear bits them
408 orr r0, r0, r6 @ set them
Catalin Marinas347c8b72009-07-24 12:32:56 +0100409 THUMB( orr r0, r0, #1 << 30 ) @ Thumb exceptions
Catalin Marinasbbe88882007-05-08 22:27:46 +0100410 mov pc, lr @ return to head.S:__ret
Catalin Marinas93ed3972008-08-28 11:22:32 +0100411ENDPROC(__v7_setup)
Catalin Marinasbbe88882007-05-08 22:27:46 +0100412
Catalin Marinas8d2cd3a2011-11-22 17:30:28 +0000413 .align 2
Catalin Marinasbbe88882007-05-08 22:27:46 +0100414__v7_setup_stack:
415 .space 4 * 11 @ 11 registers
416
Russell King5085f3f2010-10-01 15:37:05 +0100417 __INITDATA
418
Dave Martin78a8f3c2011-06-23 17:26:19 +0100419 @ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
420 define_processor_functions v7, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100421#ifdef CONFIG_CPU_PJ4B
422 define_processor_functions pj4b, dabort=v7_early_abort, pabort=v7_pabort, suspend=1
423#endif
Catalin Marinasbbe88882007-05-08 22:27:46 +0100424
Russell King5085f3f2010-10-01 15:37:05 +0100425 .section ".rodata"
426
Dave Martin78a8f3c2011-06-23 17:26:19 +0100427 string cpu_arch_name, "armv7"
428 string cpu_elf_name, "v7"
Catalin Marinasbbe88882007-05-08 22:27:46 +0100429 .align
430
431 .section ".proc.info.init", #alloc, #execinstr
432
Pawel Molldc939cd2011-05-20 14:39:28 +0100433 /*
434 * Standard v7 proc info content
435 */
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100436.macro __v7_proc initfunc, mm_mmuflags = 0, io_mmuflags = 0, hwcaps = 0, proc_fns = v7_processor_functions
Pawel Molldc939cd2011-05-20 14:39:28 +0100437 ALT_SMP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000438 PMD_SECT_AF | PMD_FLAGS_SMP | \mm_mmuflags)
Pawel Molldc939cd2011-05-20 14:39:28 +0100439 ALT_UP(.long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | \
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000440 PMD_SECT_AF | PMD_FLAGS_UP | \mm_mmuflags)
441 .long PMD_TYPE_SECT | PMD_SECT_AP_WRITE | \
442 PMD_SECT_AP_READ | PMD_SECT_AF | \io_mmuflags
Pawel Molldc939cd2011-05-20 14:39:28 +0100443 W(b) \initfunc
Daniel Walker14eff182010-09-17 16:42:10 +0100444 .long cpu_arch_name
445 .long cpu_elf_name
Pawel Molldc939cd2011-05-20 14:39:28 +0100446 .long HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB | HWCAP_FAST_MULT | \
447 HWCAP_EDSP | HWCAP_TLS | \hwcaps
Daniel Walker14eff182010-09-17 16:42:10 +0100448 .long cpu_v7_name
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100449 .long \proc_fns
Daniel Walker14eff182010-09-17 16:42:10 +0100450 .long v7wbi_tlb_fns
451 .long v6_user_fns
452 .long v7_cache_fns
Pawel Molldc939cd2011-05-20 14:39:28 +0100453.endm
454
Catalin Marinas1b6ba462011-11-22 17:30:29 +0000455#ifndef CONFIG_ARM_LPAE
Pawel Molldc939cd2011-05-20 14:39:28 +0100456 /*
Pawel Moll15eb1692011-05-20 14:39:29 +0100457 * ARM Ltd. Cortex A5 processor.
458 */
459 .type __v7_ca5mp_proc_info, #object
460__v7_ca5mp_proc_info:
461 .long 0x410fc050
462 .long 0xff0ffff0
463 __v7_proc __v7_ca5mp_setup
464 .size __v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
465
466 /*
Pawel Molldc939cd2011-05-20 14:39:28 +0100467 * ARM Ltd. Cortex A9 processor.
468 */
469 .type __v7_ca9mp_proc_info, #object
470__v7_ca9mp_proc_info:
471 .long 0x410fc090
472 .long 0xff0ffff0
473 __v7_proc __v7_ca9mp_setup
Daniel Walker14eff182010-09-17 16:42:10 +0100474 .size __v7_ca9mp_proc_info, . - __v7_ca9mp_proc_info
Gregory CLEMENTde490192012-10-03 11:58:07 +0200475
Gregory CLEMENTb361d612013-04-09 13:37:20 +0100476#endif /* CONFIG_ARM_LPAE */
477
Gregory CLEMENTde490192012-10-03 11:58:07 +0200478 /*
479 * Marvell PJ4B processor.
480 */
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100481#ifdef CONFIG_CPU_PJ4B
Gregory CLEMENTde490192012-10-03 11:58:07 +0200482 .type __v7_pj4b_proc_info, #object
483__v7_pj4b_proc_info:
Gregory CLEMENT049be072013-06-10 18:05:51 +0100484 .long 0x560f5800
485 .long 0xff0fff00
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100486 __v7_proc __v7_pj4b_setup, proc_fns = pj4b_processor_functions
Gregory CLEMENTde490192012-10-03 11:58:07 +0200487 .size __v7_pj4b_proc_info, . - __v7_pj4b_proc_info
Gregory CLEMENT3e0a07f2013-06-23 10:17:11 +0100488#endif
Daniel Walker14eff182010-09-17 16:42:10 +0100489
Catalin Marinasbbe88882007-05-08 22:27:46 +0100490 /*
Jonathan Austinc90ad5c2012-03-15 14:27:07 +0000491 * ARM Ltd. Cortex R7 processor.
492 */
493 .type __v7_cr7mp_proc_info, #object
494__v7_cr7mp_proc_info:
495 .long 0x410fc170
496 .long 0xff0ffff0
497 __v7_proc __v7_cr7mp_setup
498 .size __v7_cr7mp_proc_info, . - __v7_cr7mp_proc_info
499
500 /*
Will Deacon868dbf92012-01-20 12:01:14 +0100501 * ARM Ltd. Cortex A7 processor.
502 */
503 .type __v7_ca7mp_proc_info, #object
504__v7_ca7mp_proc_info:
505 .long 0x410fc070
506 .long 0xff0ffff0
Stephen Boyd8164f7a2013-03-18 19:44:15 +0100507 __v7_proc __v7_ca7mp_setup
Will Deacon868dbf92012-01-20 12:01:14 +0100508 .size __v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
509
510 /*
Jonathan Austinddb2ff72014-01-13 12:10:57 +0100511 * ARM Ltd. Cortex A12 processor.
512 */
513 .type __v7_ca12mp_proc_info, #object
514__v7_ca12mp_proc_info:
515 .long 0x410fc0d0
516 .long 0xff0ffff0
517 __v7_proc __v7_ca12mp_setup
518 .size __v7_ca12mp_proc_info, . - __v7_ca12mp_proc_info
519
520 /*
Will Deacon7665d9d2011-01-12 17:10:45 +0000521 * ARM Ltd. Cortex A15 processor.
522 */
523 .type __v7_ca15mp_proc_info, #object
524__v7_ca15mp_proc_info:
525 .long 0x410fc0f0
526 .long 0xff0ffff0
Stephen Boyd8164f7a2013-03-18 19:44:15 +0100527 __v7_proc __v7_ca15mp_setup
Will Deacon7665d9d2011-01-12 17:10:45 +0000528 .size __v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
529
530 /*
Will Deaconcd000cf2014-05-02 17:06:02 +0100531 * ARM Ltd. Cortex A17 processor.
532 */
533 .type __v7_ca17mp_proc_info, #object
534__v7_ca17mp_proc_info:
535 .long 0x410fc0e0
536 .long 0xff0ffff0
537 __v7_proc __v7_ca17mp_setup
538 .size __v7_ca17mp_proc_info, . - __v7_ca17mp_proc_info
539
540 /*
Stepan Moskovchenko120ecfa2013-03-18 19:44:16 +0100541 * Qualcomm Inc. Krait processors.
542 */
543 .type __krait_proc_info, #object
544__krait_proc_info:
545 .long 0x510f0400 @ Required ID value
546 .long 0xff0ffc00 @ Mask for ID
547 /*
548 * Some Krait processors don't indicate support for SDIV and UDIV
549 * instructions in the ARM instruction set, even though they actually
550 * do support them.
551 */
552 __v7_proc __v7_setup, hwcaps = HWCAP_IDIV
553 .size __krait_proc_info, . - __krait_proc_info
554
555 /*
Catalin Marinasbbe88882007-05-08 22:27:46 +0100556 * Match any ARMv7 processor core.
557 */
558 .type __v7_proc_info, #object
559__v7_proc_info:
560 .long 0x000f0000 @ Required ID value
561 .long 0x000f0000 @ Mask for ID
Pawel Molldc939cd2011-05-20 14:39:28 +0100562 __v7_proc __v7_setup
Catalin Marinasbbe88882007-05-08 22:27:46 +0100563 .size __v7_proc_info, . - __v7_proc_info