arm: Disable LPAE if not enabled

If CONFIG_ARMV7_LPAE is not defined we should make sure that the feature
is disabled. This can happen if U-Boot is chain-loaded from another boot
loader which does enable LPAE.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/arm/lib/cache-cp15.c b/arch/arm/lib/cache-cp15.c
index f293573..cf852c0 100644 (file)
--- a/arch/arm/lib/cache-cp15.c
+++ b/arch/arm/lib/cache-cp15.c
@@ -172,6 +172,15 @@ static inline void mmu_setup(void)
                        : : "r" (MEMORY_ATTRIBUTES) : "memory");
        }
 #elif defined(CONFIG_CPU_V7)
+       if (is_hyp()) {
+               /* Set HTCR to disable LPAE */
+               asm volatile("mcr p15, 4, %0, c2, c0, 2"
+                       : : "r" (0) : "memory");
+       } else {
+               /* Set TTBCR to disable LPAE */
+               asm volatile("mcr p15, 0, %0, c2, c0, 2"
+                       : : "r" (0) : "memory");
+       }
        /* Set TTBR0 */
        reg = gd->arch.tlb_addr & TTBR0_BASE_ADDR_MASK;
 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)