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yaml
---
r: 336023
b: refs/heads/master
c: 5010192
h: refs/heads/master
i:
  336021: 9e73e29
  336019: d5fc837
  336015: f81dd04
v: v3
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Dave Martin authored and Russell King committed Nov 23, 2012
1 parent bad3662 commit 6ad4ebd
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Showing 2 changed files with 14 additions and 2 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 2b6e204f84cc8e324c5425ea98e378a2aeba3be0
refs/heads/master: 5010192d5ae589002c4453d6c6e662e5e9acae59
14 changes: 13 additions & 1 deletion trunk/arch/arm/boot/compressed/head.S
Original file line number Diff line number Diff line change
Expand Up @@ -652,6 +652,15 @@ __setup_mmu: sub r3, r4, #16384 @ Page directory size
mov pc, lr
ENDPROC(__setup_mmu)

@ Enable unaligned access on v6, to allow better code generation
@ for the decompressor C code:
__armv6_mmu_cache_on:
mrc p15, 0, r0, c1, c0, 0 @ read SCTLR
bic r0, r0, #2 @ A (no unaligned access fault)
orr r0, r0, #1 << 22 @ U (v6 unaligned access model)
mcr p15, 0, r0, c1, c0, 0 @ write SCTLR
b __armv4_mmu_cache_on

__arm926ejs_mmu_cache_on:
#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
mov r0, #4 @ put dcache in WT mode
Expand Down Expand Up @@ -694,6 +703,9 @@ __armv7_mmu_cache_on:
bic r0, r0, #1 << 28 @ clear SCTLR.TRE
orr r0, r0, #0x5000 @ I-cache enable, RR cache replacement
orr r0, r0, #0x003c @ write buffer
bic r0, r0, #2 @ A (no unaligned access fault)
orr r0, r0, #1 << 22 @ U (v6 unaligned access model)
@ (needed for ARM1176)
#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_ENDIAN_BE8
orr r0, r0, #1 << 25 @ big-endian page tables
Expand Down Expand Up @@ -914,7 +926,7 @@ proc_types:

.word 0x0007b000 @ ARMv6
.word 0x000ff000
W(b) __armv4_mmu_cache_on
W(b) __armv6_mmu_cache_on
W(b) __armv4_mmu_cache_off
W(b) __armv6_mmu_cache_flush

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