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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/arm/boot/compressed/head-xscale.S | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/arm/boot/compressed/head-xscale.S')
-rw-r--r-- | arch/arm/boot/compressed/head-xscale.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head-xscale.S b/arch/arm/boot/compressed/head-xscale.S new file mode 100644 index 00000000..aa5ee49c --- /dev/null +++ b/arch/arm/boot/compressed/head-xscale.S @@ -0,0 +1,41 @@ +/* + * linux/arch/arm/boot/compressed/head-xscale.S + * + * XScale specific tweaks. This is merged into head.S by the linker. + * + */ + +#include <linux/linkage.h> + + .section ".start", "ax" + +__XScale_start: + + @ Preserve r8/r7 i.e. kernel entry values + + @ Data cache might be active. + @ Be sure to flush kernel binary out of the cache, + @ whatever state it is, before it is turned off. + @ This is done by fetching through currently executed + @ memory to be sure we hit the same cache. + bic r2, pc, #0x1f + add r3, r2, #0x10000 @ 64 kb is quite enough... +1: ldr r0, [r2], #32 + teq r2, r3 + bne 1b + mcr p15, 0, r0, c7, c10, 4 @ drain WB + mcr p15, 0, r0, c7, c7, 0 @ flush I & D caches + + @ disabling MMU and caches + mrc p15, 0, r0, c1, c0, 0 @ read control reg + bic r0, r0, #0x05 @ clear DC, MMU + bic r0, r0, #0x1000 @ clear Icache + mcr p15, 0, r0, c1, c0, 0 + +#ifdef CONFIG_ARCH_IXP2000 + mov r1, #-1 + mov r0, #0xd6000000 + str r1, [r0, #0x14] + str r1, [r0, #0x18] +#endif + |