arm: provide a function for boards init code to modify MMU virtual-physical map

Provide function for setting arbitrary virtual-physical MMU mapping
and cache settings for the given region.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

2 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h
new file mode 100644
index 0000000000..9ac16f599e
--- /dev/null
+++ b/arch/arm/include/asm/mmu.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __ASM_ARM_MMU_H
+#define __ASM_ARM_MMU_H
+
+void init_addr_map(void);
+
+#endif
diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index f51ee44720..37c1bfd726 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -588,6 +588,19 @@ s32 psci_features(u32 function_id, u32 psci_fid);
 void save_boot_params_ret(void);
 
 /**
+ * mmu_set_region_dcache_behaviour_phys() - set virt/phys mapping
+ *
+ * Change the virt/phys mapping and cache settings for a region.
+ *
+ * @virt:	virtual start address of memory region to change
+ * @phys:	physical address for the memory region to set
+ * @size:	size of memory region to change
+ * @option:	dcache option to select
+ */
+void mmu_set_region_dcache_behaviour_phys(phys_addr_t virt, phys_addr_t phys,
+					size_t size, enum dcache_option option);
+
+/**
  * mmu_set_region_dcache_behaviour() - set cache settings
  *
  * Change the cache settings for a region.