[PATCH 30/36] ARM mmu: pickup already enabled mmu

[Jean-Christophe PLAGNIOL-VILLARD]

From: Sascha Hauer <s.hauer at pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 arch/arm/cpu/mmu.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c
index 8f9a43e..73dd0d3 100644
--- a/arch/arm/cpu/mmu.c
+++ b/arch/arm/cpu/mmu.c
@@ -276,7 +276,14 @@ static int mmu_init(void)
 		pte_flags_uncached = PTE_FLAGS_UNCACHED_V4;
 	}
 
-	ttb = memalign(0x10000, 0x4000);
+	if (get_cr() & CR_M) {
+		asm volatile ("mrc  p15,0,%0,c2,c0,0" : "=r"(ttb));
+
+		if (!request_sdram_region("ttb", (unsigned long)ttb, SZ_16K))
+			pr_err("Error: Can't request SDRAM region for ttb\n");
+	} else {
+		ttb = memalign(0x10000, 0x4000);
+	}
 
 	pr_debug("ttb: 0x%p\n", ttb);
 
-- 
1.7.10.4