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On warm reset, all cores jump to the low_power_start function because iRAM data is retained and because while executing iROM code all cores find the jump flag 0x02020028 set. In low_power_start, cores check the reset status and if true they clear the jump flag and jump back to 0x0. The A7 cores do jump to 0x0 but consider following instructions as a Thumb instructions which in turn makes them loop inside the iROM code instead of jumping to power_down_core. This issue is fixed by replacing the "mov pc" instruction with a "bx" instruction which switches state along with the jump to make the execution unit consider the branch target as an ARM instruction. Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com> |
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.. | ||
cpu | ||
dts | ||
imx-common | ||
include | ||
lib | ||
mach-at91 | ||
mach-davinci | ||
mach-highbank | ||
mach-keystone | ||
mach-kirkwood | ||
mach-nomadik | ||
mach-orion5x | ||
mach-tegra | ||
mach-versatile | ||
mvebu-common | ||
config.mk | ||
Kconfig | ||
Kconfig.debug | ||
Makefile |