[ARM] 4503/1: nommu: Add noMMU support for ARMv7
This patch adds the necessary ifdef's to the proc-v7.S code and
defines the v7wbi_tlb_fns macro in pgtable-nommu.h
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 7cc32b7..58109ae 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -377,7 +377,7 @@
select CPU_CACHE_V7
select CPU_CACHE_VIPT
select CPU_CP15_MMU
- select CPU_HAS_ASID
+ select CPU_HAS_ASID if MMU
select CPU_COPY_V6 if MMU
select CPU_TLB_V7 if MMU
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 07b0269..e0acc5a 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -77,6 +77,7 @@
* - we are not using split page tables
*/
ENTRY(cpu_v7_switch_mm)
+#ifdef CONFIG_MMU
mov r2, #0
ldr r1, [r1, #MM_CONTEXT_ID] @ get mm->context.id
orr r0, r0, #TTB_RGN_OC_WB @ mark PTWs outer cacheable, WB
@@ -86,6 +87,7 @@
isb
mcr p15, 0, r1, c13, c0, 1 @ set context ID
isb
+#endif
mov pc, lr
/*
@@ -109,6 +111,7 @@
* 1111 0 1 1 r/w r/w
*/
ENTRY(cpu_v7_set_pte_ext)
+#ifdef CONFIG_MMU
str r1, [r0], #-2048 @ linux version
bic r3, r1, #0x000003f0
@@ -136,6 +139,7 @@
str r3, [r0]
mcr p15, 0, r0, c7, c10, 1 @ flush_pte
+#endif
mov pc, lr
cpu_v7_name:
@@ -169,6 +173,7 @@
mcr p15, 0, r10, c7, c5, 0 @ I+BTB cache invalidate
#endif
dsb
+#ifdef CONFIG_MMU
mcr p15, 0, r10, c8, c7, 0 @ invalidate I + D TLBs
mcr p15, 0, r10, c2, c0, 2 @ TTB control register
orr r4, r4, #TTB_RGN_OC_WB @ mark PTWs outer cacheable, WB
@@ -176,11 +181,12 @@
mcr p15, 0, r4, c2, c0, 1 @ load TTB1
mov r10, #0x1f @ domains 0, 1 = manager
mcr p15, 0, r10, c3, c0, 0 @ load domain access register
- mrc p15, 0, r0, c1, c0, 0 @ read control register
- ldr r10, cr1_clear @ get mask for bits to clear
- bic r0, r0, r10 @ clear bits them
- ldr r10, cr1_set @ get mask for bits to set
- orr r0, r0, r10 @ set them
+#endif
+ adr r5, v7_crval
+ ldmia r5, {r5, r6}
+ mrc p15, 0, r0, c1, c0, 0 @ read control register
+ bic r0, r0, r5 @ clear bits them
+ orr r0, r0, r6 @ set them
mov pc, lr @ return to head.S:__ret
/*
@@ -189,12 +195,9 @@
* rrrr rrrx xxx0 0101 xxxx xxxx x111 xxxx < forced
* 0 110 0011 1.00 .111 1101 < we want
*/
- .type cr1_clear, #object
- .type cr1_set, #object
-cr1_clear:
- .word 0x0120c302
-cr1_set:
- .word 0x00c0387d
+ .type v7_crval, #object
+v7_crval:
+ crval clear=0x0120c302, mmuset=0x00c0387d, ucset=0x00c0187c
__v7_setup_stack:
.space 4 * 11 @ 11 registers