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| author | Nicolas Pitre <nico@cam.org> | 2007-02-21 15:58:13 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-05-03 21:03:48 +0100 |
| commit | 40435792525c49cf126ba92d223e877acb5ce021 (patch) | |
| tree | 55160c4689c9e7b80e871d24acb4a1b4cc3a18d9 /arch/arm/kernel/head.S | |
| parent | 99cce8f7b10716f8fdbaca21a7f3ba000119ad3b (diff) | |
| download | lwn-40435792525c49cf126ba92d223e877acb5ce021.tar.gz lwn-40435792525c49cf126ba92d223e877acb5ce021.zip | |
[ARM] 4227/1: minor head.S fixups
Let's surround constructs like:
orr r3, r3, #(KERNEL_RAM_PADDR & 0x00f00000)
between .if .endif since (KERNEL_RAM_PADDR & 0x00f00000) is 0 in 99% of
all cases.
Also let's mask PHYS_OFFSET with 0x00f00000 instead of 0x00e00000.
Section mappings are really 1MB not 2MB and the 2MB groupping is
a higher level issue already much better enforced with
#if (PHYS_OFFSET & 0x001fffff)
#error "PHYS_OFFSET must be at an even 2MiB boundary!"
#endif
at the top of the file.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/head.S')
| -rw-r--r-- | arch/arm/kernel/head.S | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 66db0a9bf0bc..1d35edacc011 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -257,7 +257,9 @@ __create_page_tables: * Map some ram to cover our .data and .bss areas. */ orr r3, r7, #(KERNEL_RAM_PADDR & 0xff000000) + .if (KERNEL_RAM_PADDR & 0x00f00000) orr r3, r3, #(KERNEL_RAM_PADDR & 0x00f00000) + .endif add r0, r4, #(KERNEL_RAM_VADDR & 0xff000000) >> 18 str r3, [r0, #(KERNEL_RAM_VADDR & 0x00f00000) >> 18]! ldr r6, =(_end - 1) @@ -274,7 +276,9 @@ __create_page_tables: */ add r0, r4, #PAGE_OFFSET >> 18 orr r6, r7, #(PHYS_OFFSET & 0xff000000) - orr r6, r6, #(PHYS_OFFSET & 0x00e00000) + .if (PHYS_OFFSET & 0x00f00000) + orr r6, r6, #(PHYS_OFFSET & 0x00f00000) + .endif str r6, [r0] #ifdef CONFIG_DEBUG_LL |