From 7a540eeecc14b974e421ccdb26a242ccf87f3d49 Mon Sep 17 00:00:00 2001 From: Lokesh Vutla Date: Wed, 30 Oct 2019 15:55:41 +0530 Subject: [PATCH] arm: caches: Disable mmu only if mmu is available 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 --- arch/arm/lib/cache-cp15.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c index b2913e8..47c2239 100644 --- a/arch/arm/lib/cache-cp15.c +++ b/arch/arm/lib/cache-cp15.c @@ -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); } -- 2.7.4