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https://github.com/AsahiLinux/u-boot
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67a0652c47
iROM logic provides undesired jump address for CPU2. This patch adds a programmable susbstitute for a part of iROM logic which wakes up cores and provides jump addresses. This patch creates a logic to make all secondary cores jump to a particular address which evades the possibility of CPU2 jumping to wrong address and create undesired results. Logic of the workaround: Step-1: iROM code checks value at address 0x2020028. Step-2: If value is 0xc9cfcfcf, it jumps to the address (0x202000+CPUid*4), else, it continues executing normally. Step-3: Primary core puts secondary cores in WFE and store 0xc9cfcfcf in 0x2020028 and jump address (pointer to function low_power_start) in (0x202000+CPUid*4). Step-4: When secondary cores recieve event signal they jump to this address and continue execution. Signed-off-by: Kimoon Kim <kimoon.kim@samsung.com> 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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| .. | ||
| clock.c | ||
| clock_init.h | ||
| clock_init_exynos4.c | ||
| clock_init_exynos5.c | ||
| common_setup.h | ||
| config.mk | ||
| dmc_common.c | ||
| dmc_init_ddr3.c | ||
| dmc_init_exynos4.c | ||
| exynos4_setup.h | ||
| exynos5_setup.h | ||
| Kconfig | ||
| lowlevel_init.c | ||
| Makefile | ||
| pinmux.c | ||
| power.c | ||
| sec_boot.S | ||
| soc.c | ||
| spl_boot.c | ||
| system.c | ||
| tzpc.c | ||