ARM: head.S: only include __turn_mmu_on in the initial identity mapping

__create_page_tables identity maps the region of memory from
__enable_mmu to the end of __turn_mmu_on.

In preparation for including __turn_mmu_on in the .idmap.text section,
this patch modifies the identity mapping so that it only includes the
__turn_mmu_on code.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 441b004..efc111d 100644 (file)
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -170,11 +170,11 @@ __create_page_tables:
         * Create identity mapping to cater for __enable_mmu.
         * This identity mapping will be removed by paging_init().
         */
-       adr     r0, __enable_mmu_loc
+       adr     r0, __turn_mmu_on_loc
        ldmia   r0, {r3, r5, r6}
        sub     r0, r0, r3                      @ virt->phys offset
-       add     r5, r5, r0                      @ phys __enable_mmu
-       add     r6, r6, r0                      @ phys __enable_mmu_end
+       add     r5, r5, r0                      @ phys __turn_mmu_on
+       add     r6, r6, r0                      @ phys __turn_mmu_on_end
        mov     r5, r5, lsr #SECTION_SHIFT
        mov     r6, r6, lsr #SECTION_SHIFT
 
@@ -290,10 +290,10 @@ __create_page_tables:
 ENDPROC(__create_page_tables)
        .ltorg
        .align
-__enable_mmu_loc:
+__turn_mmu_on_loc:
        .long   .
-       .long   __enable_mmu
-       .long   __enable_mmu_end
+       .long   __turn_mmu_on
+       .long   __turn_mmu_on_end
 
 #if defined(CONFIG_SMP)
        __CPUINIT
@@ -412,7 +412,7 @@ __turn_mmu_on:
        mov     r3, r3
        mov     r3, r13
        mov     pc, r3
-__enable_mmu_end:
+__turn_mmu_on_end:
 ENDPROC(__turn_mmu_on)