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authorGrant Likely <grant.likely@secretlab.ca>2011-04-28 14:27:20 -0600
committerGrant Likely <grant.likely@secretlab.ca>2011-05-11 15:12:32 +0200
commit4c2896e88d976d0e5b2213c64cde885f5677fa2b (patch)
treed5573124e35cb3b81b7ac56fb4d7708eacf4991d /arch/arm/kernel/head.S
parent7ee4b98eca42c1ff1df7dcf443dac07f0a2ea93d (diff)
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.S8
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index c9173cfbbc7..a5e5c5b9b48 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
*