From: Hou Zhiqiang <b48...@freescale.com>
Expose this API to make it reuseable when u-boot turn into other EL
from EL3.
Signed-off-by: Hou Zhiqiang <b48...@freescale.com>
---
arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 24 ++++++++++++++++++++++++
include/common.h | 1 +
2 files changed, 25 insertions(+)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index 6ea28ed..df5670f 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -403,6 +403,30 @@ void enable_caches(void)
final_mmu_setup();
__asm_invalidate_tlb_all();
}
+
+static void mmu_disable(void)
+{
+ if (get_sctlr() & CR_M)
+ set_sctlr(get_sctlr() & ~CR_M);
+}
+
+static void mmu_enable(void)
+{
+ if (!(get_sctlr() & CR_M))
+ set_sctlr(get_sctlr() | CR_M);
+}
+
+void mmu_init(void)
+{
+ mmu_disable();
+ dcache_disable();
+ icache_disable();
+ final_mmu_setup();
+ __asm_invalidate_tlb_all();
+ mmu_enable();
+ icache_enable();
+ set_sctlr(get_sctlr() | CR_C);
+}
#endif
static inline u32 initiator_type(u32 cluster, int init_id)
diff --git a/include/common.h b/include/common.h
index 75c78d5..57a9b30 100644
--- a/include/common.h
+++ b/include/common.h
@@ -757,6 +757,7 @@ void flush_dcache_range(unsigned long start,
unsigned long stop);
void invalidate_dcache_range(unsigned long start, unsigned long stop);
void invalidate_dcache_all(void);
void invalidate_icache_all(void);
+void mmu_init(void);
enum {
/* Disable caches (else flush caches but leave them active) */
--
2.1.0.27.g96db324
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