Modern processors may need to drain the WB before WFI

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Since WFI may cause the processor to enter a low-power mode, data may
still be in the write buffer. This patch adds a DSB (or DWB) to the
cpu_(v6|v7)_do_idle functions before the WFI.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Catalin Marinas 2008-11-10 14:14:11 +00:00

parent 73b63efaac

commit 8553cb67d2

2 changed files with 3 additions and 0 deletions

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2

arch/arm/mm/proc-v6.S

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1

arch/arm/mm/proc-v7.S

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