diff options
Diffstat (limited to 'arch/arm/mm/proc-v6.S')
-rw-r--r-- | arch/arm/mm/proc-v6.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S index 09b1a41a6de8..ca13d4d05f65 100644 --- a/arch/arm/mm/proc-v6.S +++ b/arch/arm/mm/proc-v6.S | |||
@@ -2,6 +2,7 @@ | |||
2 | * linux/arch/arm/mm/proc-v6.S | 2 | * linux/arch/arm/mm/proc-v6.S |
3 | * | 3 | * |
4 | * Copyright (C) 2001 Deep Blue Solutions Ltd. | 4 | * Copyright (C) 2001 Deep Blue Solutions Ltd. |
5 | * Modified by Catalin Marinas for noMMU support | ||
5 | * | 6 | * |
6 | * This program is free software; you can redistribute it and/or modify | 7 | * 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 | * it under the terms of the GNU General Public License version 2 as |
@@ -88,6 +89,7 @@ ENTRY(cpu_v6_dcache_clean_area) | |||
88 | * - we are not using split page tables | 89 | * - we are not using split page tables |
89 | */ | 90 | */ |
90 | ENTRY(cpu_v6_switch_mm) | 91 | ENTRY(cpu_v6_switch_mm) |
92 | #ifdef CONFIG_MMU | ||
91 | mov r2, #0 | 93 | mov r2, #0 |
92 | ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id | 94 | ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id |
93 | #ifdef CONFIG_SMP | 95 | #ifdef CONFIG_SMP |
@@ -97,6 +99,7 @@ ENTRY(cpu_v6_switch_mm) | |||
97 | mcr p15, 0, r2, c7, c10, 4 @ drain write buffer | 99 | mcr p15, 0, r2, c7, c10, 4 @ drain write buffer |
98 | mcr p15, 0, r0, c2, c0, 0 @ set TTB 0 | 100 | mcr p15, 0, r0, c2, c0, 0 @ set TTB 0 |
99 | mcr p15, 0, r1, c13, c0, 1 @ set context ID | 101 | mcr p15, 0, r1, c13, c0, 1 @ set context ID |
102 | #endif | ||
100 | mov pc, lr | 103 | mov pc, lr |
101 | 104 | ||
102 | /* | 105 | /* |
@@ -119,6 +122,7 @@ ENTRY(cpu_v6_switch_mm) | |||
119 | * 1111 0 1 1 r/w r/w | 122 | * 1111 0 1 1 r/w r/w |
120 | */ | 123 | */ |
121 | ENTRY(cpu_v6_set_pte) | 124 | ENTRY(cpu_v6_set_pte) |
125 | #ifdef CONFIG_MMU | ||
122 | str r1, [r0], #-2048 @ linux version | 126 | str r1, [r0], #-2048 @ linux version |
123 | 127 | ||
124 | bic r2, r1, #0x000003f0 | 128 | bic r2, r1, #0x000003f0 |
@@ -145,6 +149,7 @@ ENTRY(cpu_v6_set_pte) | |||
145 | 149 | ||
146 | str r2, [r0] | 150 | str r2, [r0] |
147 | mcr p15, 0, r0, c7, c10, 1 @ flush_pte | 151 | mcr p15, 0, r0, c7, c10, 1 @ flush_pte |
152 | #endif | ||
148 | mov pc, lr | 153 | mov pc, lr |
149 | 154 | ||
150 | 155 | ||
@@ -194,12 +199,14 @@ __v6_setup: | |||
194 | mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache | 199 | mcr p15, 0, r0, c7, c5, 0 @ invalidate I cache |
195 | mcr p15, 0, r0, c7, c15, 0 @ clean+invalidate cache | 200 | mcr p15, 0, r0, c7, c15, 0 @ clean+invalidate cache |
196 | mcr p15, 0, r0, c7, c10, 4 @ drain write buffer | 201 | mcr p15, 0, r0, c7, c10, 4 @ drain write buffer |
202 | #ifdef CONFIG_MMU | ||
197 | mcr p15, 0, r0, c8, c7, 0 @ invalidate I + D TLBs | 203 | mcr p15, 0, r0, c8, c7, 0 @ invalidate I + D TLBs |
198 | mcr p15, 0, r0, c2, c0, 2 @ TTB control register | 204 | mcr p15, 0, r0, c2, c0, 2 @ TTB control register |
199 | #ifdef CONFIG_SMP | 205 | #ifdef CONFIG_SMP |
200 | orr r4, r4, #TTB_RGN_WBWA|TTB_S @ mark PTWs shared, outer cacheable | 206 | orr r4, r4, #TTB_RGN_WBWA|TTB_S @ mark PTWs shared, outer cacheable |
201 | #endif | 207 | #endif |
202 | mcr p15, 0, r4, c2, c0, 1 @ load TTB1 | 208 | mcr p15, 0, r4, c2, c0, 1 @ load TTB1 |
209 | #endif /* CONFIG_MMU */ | ||
203 | #ifdef CONFIG_VFP | 210 | #ifdef CONFIG_VFP |
204 | mrc p15, 0, r0, c1, c0, 2 | 211 | mrc p15, 0, r0, c1, c0, 2 |
205 | orr r0, r0, #(0xf << 20) | 212 | orr r0, r0, #(0xf << 20) |