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| author | Grant Likely <grant.likely@secretlab.ca> | 2011-04-28 14:27:20 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-05-11 15:12:32 +0200 |
| commit | 4c2896e88d976d0e5b2213c64cde885f5677fa2b (patch) | |
| tree | d5573124e35cb3b81b7ac56fb4d7708eacf4991d /arch/arm/kernel/head.S | |
| parent | 7ee4b98eca42c1ff1df7dcf443dac07f0a2ea93d (diff) | |
| download | op-kernel-dev-4c2896e88d976d0e5b2213c64cde885f5677fa2b.zip op-kernel-dev-4c2896e88d976d0e5b2213c64cde885f5677fa2b.tar.gz | |
arm/dt: Make __vet_atags also accept a dtb image
The dtb is passed to the kernel via register r2, which is the same
method that is used to pass an atags pointer. This patch modifies
__vet_atags to not clear r2 when it encounters a dtb image.
v2: fixed bugs pointed out by Nicolas Pitre
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/arm/kernel/head.S')
| -rw-r--r-- | arch/arm/kernel/head.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index c9173cf..a5e5c5b 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -59,7 +59,7 @@ * * This is normally called from the decompressor code. The requirements * are: MMU = off, D-cache = off, I-cache = dont care, r0 = 0, - * r1 = machine nr, r2 = atags pointer. + * r1 = machine nr, r2 = atags or dtb pointer. * * This code is mostly position independent, so if you link the kernel at * 0xc0008000, you call this at __pa(0xc0008000). @@ -91,7 +91,7 @@ ENTRY(stext) #endif /* - * r1 = machine no, r2 = atags, + * r1 = machine no, r2 = atags or dtb, * r8 = phys_offset, r9 = cpuid, r10 = procinfo */ bl __vet_atags @@ -339,7 +339,7 @@ __secondary_data: * * r0 = cp#15 control register * r1 = machine ID - * r2 = atags pointer + * r2 = atags or dtb pointer * r4 = page table pointer * r9 = processor ID * r13 = *virtual* address to jump to upon completion @@ -376,7 +376,7 @@ ENDPROC(__enable_mmu) * * r0 = cp#15 control register * r1 = machine ID - * r2 = atags pointer + * r2 = atags or dtb pointer * r9 = processor ID * r13 = *virtual* address to jump to upon completion * |
