SPM: Refactor xlat context creation

Right now the virtual address space is fixed to
PLAT_VIRT_ADDR_SPACE_SIZE, so all base translation tables are the same
size and need the same alignment. The current code allocates the exact
space needed by this initial table.

However, a following patch is going to allow each partition to choose
the size of its address space based on the memory regions defined in
their resource description, so it isn't possible to determine this at
build time. As this optimization no longer applies, it has to be
removed.

Change-Id: Ia8d19f4981e1017e4ffe0ba136de73d701044cb0
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

services/std_svc/spm/spm_main.c

@@ -328,9 +328,6 @@ int32_t spm_setup(void)
 		/* Initialize context of the SP */
 		INFO("Secure Partition %u context setup start...\n", i);
 
-		/* Assign translation tables context. */
-		ctx->xlat_ctx_handle = spm_sp_xlat_context_alloc();
-
 		/* Save location of the image in physical memory */
 		ctx->image_base = (uintptr_t)sp_base;
 		ctx->image_size = sp_size;

services/std_svc/spm/spm_private.h

@@ -100,7 +100,7 @@ void spm_exceptions_xlat_init_context(void);
 uint64_t *spm_exceptions_xlat_get_base_table(void);
 
 /* Functions related to the translation tables management */
-xlat_ctx_t *spm_sp_xlat_context_alloc(void);
+void spm_sp_xlat_context_alloc(sp_context_t *sp_ctx);
 void sp_map_memory_regions(sp_context_t *sp_ctx);
 
 /* Functions to handle Secure Partition contexts */

services/std_svc/spm/spm_setup.c

@@ -60,6 +60,9 @@ void spm_sp_setup(sp_context_t *sp_ctx)
 	 * ------------------------
 	 */
 
+	/* Assign translation tables context. */
+	spm_sp_xlat_context_alloc(sp_ctx);
+
 	sp_map_memory_regions(sp_ctx);
 
 	/*

services/std_svc/spm/spm_xlat.c

@@ -50,17 +50,6 @@ static OBJECT_POOL(sp_xlat_tables_pool, sp_xlat_tables,
 	XLAT_TABLE_ENTRIES * sizeof(uint64_t),
 	(PLAT_SP_IMAGE_MAX_XLAT_TABLES + 1) * PLAT_SPM_MAX_PARTITIONS);
 
-/* Allocate base translation tables. */
-static uint64_t sp_xlat_base_tables
-	[GET_NUM_BASE_LEVEL_ENTRIES(PLAT_VIRT_ADDR_SPACE_SIZE)]
-	[PLAT_SPM_MAX_PARTITIONS]
-	__aligned(GET_NUM_BASE_LEVEL_ENTRIES(PLAT_VIRT_ADDR_SPACE_SIZE)
-		  * sizeof(uint64_t))
-	__section(PLAT_SP_IMAGE_XLAT_SECTION_NAME);
-static OBJECT_POOL(sp_xlat_base_tables_pool, sp_xlat_base_tables,
-	GET_NUM_BASE_LEVEL_ENTRIES(PLAT_VIRT_ADDR_SPACE_SIZE) * sizeof(uint64_t),
-	PLAT_SPM_MAX_PARTITIONS);
-
 /* Allocate arrays. */
 static int sp_xlat_mapped_regions[PLAT_SP_IMAGE_MAX_XLAT_TABLES]
 	[PLAT_SPM_MAX_PARTITIONS];
@@ -73,13 +62,13 @@ static OBJECT_POOL(sp_xlat_ctx_pool, sp_xlat_ctx, sizeof(xlat_ctx_t),
 	PLAT_SPM_MAX_PARTITIONS);
 
 /* Get handle of Secure Partition translation context */
-xlat_ctx_t *spm_sp_xlat_context_alloc(void)
+void spm_sp_xlat_context_alloc(sp_context_t *sp_ctx)
 {
 	xlat_ctx_t *ctx = pool_alloc(&sp_xlat_ctx_pool);
 
 	struct mmap_region *mmap = pool_alloc(&sp_mmap_regions_pool);
 
-	uint64_t *base_table = pool_alloc(&sp_xlat_base_tables_pool);
+	uint64_t *base_table = pool_alloc(&sp_xlat_tables_pool);
 	uint64_t **tables = pool_alloc_n(&sp_xlat_tables_pool,
 					PLAT_SP_IMAGE_MAX_XLAT_TABLES);
 
@@ -91,7 +80,7 @@ xlat_ctx_t *spm_sp_xlat_context_alloc(void)
 			       PLAT_SP_IMAGE_MAX_XLAT_TABLES, base_table,
 			       EL1_EL0_REGIME, mapped_regions);
 
-	return ctx;
+	sp_ctx->xlat_ctx_handle = ctx;
 };
 
 /*******************************************************************************