linux-stable-rt/arch/arm/boot/compressed/big-endian.S

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ArmAsm
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/*
* linux/arch/arm/boot/compressed/big-endian.S
*
* Switch CPU into big endian mode.
* Author: Nicolas Pitre
*/
.section ".start", #alloc, #execinstr
mrc p15, 0, r0, c1, c0, 0 @ read control reg
orr r0, r0, #(1 << 7) @ enable big endian mode
mcr p15, 0, r0, c1, c0, 0 @ write control reg