ARM: 8389/1: Add cpu_resume_arm() for firmwares that resume in ARM state

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Some platforms always enter the kernel in the ARM state even if
the kernel is compiled for THUMB2. Add a small wrapper on top of
cpu_resume() that switches into THUMB2 state.

This provides the functionality to fix a problem reported by Kevin
Hilman on next-20150601 where the ifc6410 fails to boot a THUMB2
kernel because the platform's firmware always enters the kernel in
ARM mode from deep idle states.

(rmk: tweaked to work without BSYM->badr changes.)

Reported-by: Kevin Hilman <khilman@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Lina Iyer <lina.iyer@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Stephen Boyd 2015-06-09 19:24:23 +01:00 • committed by Russell King

parent 02b4e2756e

commit 32e55a777f

2 changed files with 8 additions and 0 deletions

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1

arch/arm/include/asm/suspend.h

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7

arch/arm/kernel/sleep.S

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