Convert arm_setup_page_tables into a generic helper

This function is not related to Arm platforms and can be reused by other
platforms if needed.

Change-Id: Ia9c328ce57ce7e917b825a9e09a42b0abb1a53e8
Co-authored-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/plat/common/plat_bl_common.c b/plat/common/plat_bl_common.c
index 50d79d42..4cf1cc57 100644
--- a/plat/common/plat_bl_common.c
+++ b/plat/common/plat_bl_common.c
@@ -73,3 +73,40 @@ int plat_get_mbedtls_heap(void **heap_addr, size_t *heap_size)
 	return 0;
 }
 #endif /* TRUSTED_BOARD_BOOT */
+
+/*
+ * Set up the page tables for the generic and platform-specific memory regions.
+ * The size of the Trusted SRAM seen by the BL image must be specified as well
+ * as an array specifying the generic memory regions which can be;
+ * - Code section;
+ * - Read-only data section;
+ * - Init code section, if applicable
+ * - Coherent memory region, if applicable.
+ */
+
+void __init setup_page_tables(const mmap_region_t *bl_regions,
+			      const mmap_region_t *plat_regions)
+{
+#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
+	const mmap_region_t *regions = bl_regions;
+
+	while (regions->size != 0U) {
+		VERBOSE("Region: 0x%lx - 0x%lx has attributes 0x%x\n",
+				regions->base_va,
+				regions->base_va + regions->size,
+				regions->attr);
+		regions++;
+	}
+#endif
+	/*
+	 * Map the Trusted SRAM with appropriate memory attributes.
+	 * Subsequent mappings will adjust the attributes for specific regions.
+	 */
+	mmap_add(bl_regions);
+
+	/* Now (re-)map the platform-specific memory regions */
+	mmap_add(plat_regions);
+
+	/* Create the page tables to reflect the above mappings */
+	init_xlat_tables();
+}