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 --- arch/arm/lib/bootm.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index 4dbe6a5303..d14a8b5737 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -359,6 +359,7 @@ 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) {