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armv7m: Disable D-cache when booting nommu(ARMv7M) Linux kernel

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Disable D-Cache is required when booting nommu Linux kernel.
(please see Linux kernel source "arch/arm/kernel/head-nommu.S")

U-Boot is enabled D-cache and I-Cache at startup.
However, it does not disable D-Cache before
booting nommu Linux kernel.
Therefore, I call dcache_disable()
when the CPU is ARMv7M to fix this problem.

Signed-off-by: Toshifumi NISHINAGA <tnishinaga.dev@gmail.com>
This commit is contained in:
tnishinaga.dev@gmail.com 2017-06-05 01:18:08 +09:00 • committed by Tom Rini
parent 00bbe96eba
commit 8f079cccb3
1 changed files with 1 additions and 0 deletions
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arch/arm/lib/bootm.c
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@ -360,6 +360,7 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
#ifdef CONFIG_CPU_V7M
ulong addr = (ulong)kernel_entry | 1;
kernel_entry = (void *)addr;
dcache_disable();
#endif
s = getenv("machid");
if (s) {