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arm: caches: Disable mmu only if mmu is available

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As part of disabling caches MMU as well gets disabled. But MMU is not
available on all armv7 cores like R5F. So disable MMU only if it is
available.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Lokesh Vutla
2019-10-30 15:55:41 +05:30
committed by Tom Rini
parent 68c0912bf2
commit 7a540eeecc
1 changed files with 6 additions and 0 deletions
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6
arch/arm/lib/cache-cp15.c
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@@ -235,12 +235,18 @@ static void cache_disable(uint32_t cache_bit)
/* if cache isn;t enabled no need to disable */
if ((reg & CR_C) != CR_C)
return;
#ifdef CONFIG_SYS_ARM_MMU
/* if disabling data cache, disable mmu too */
cache_bit |= CR_M;
#endif
}
reg = get_cr();
#ifdef CONFIG_SYS_ARM_MMU
if (cache_bit == (CR_C | CR_M))
#elif defined(CONFIG_SYS_ARM_MPU)
if (cache_bit == CR_C)
#endif
flush_dcache_all();
set_cr(reg & ~cache_bit);
}