Merge changes from topic "xlat" into integration

* changes:
  Factor xlat_table sections in linker scripts out into a header file
  xlat_tables_v2: use ARRAY_SIZE in REGISTER_XLAT_CONTEXT_FULL_SPEC
  xlat_tables_v2: merge REGISTER_XLAT_CONTEXT_{FULL_SPEC,RO_BASE_TABLE}

3 files changed, 39 insertions, 47 deletions

diff --git a/include/common/bl_common.ld.h b/include/common/bl_common.ld.h
new file mode 100644
index 000000000..32c54b4d2
--- /dev/null
+++ b/include/common/bl_common.ld.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef BL_COMMON_LD_H
+#define BL_COMMON_LD_H
+
+/*
+ * The xlat_table section is for full, aligned page tables (4K).
+ * Removing them from .bss avoids forcing 4K alignment on
+ * the .bss section. The tables are initialized to zero by the translation
+ * tables library.
+ */
+#define XLAT_TABLE_SECTION				\
+	xlat_table (NOLOAD) : {				\
+		*(xlat_table)				\
+	}
+
+#endif /* BL_COMMON_LD_H */
diff --git a/include/lib/xlat_tables/xlat_tables_v2.h b/include/lib/xlat_tables/xlat_tables_v2.h
index a80fab073..ab311f4cb 100644
--- a/include/lib/xlat_tables/xlat_tables_v2.h
+++ b/include/lib/xlat_tables/xlat_tables_v2.h
@@ -164,14 +164,20 @@ typedef struct xlat_ctx xlat_ctx_t;
  *   Would typically be PLAT_VIRT_ADDR_SPACE_SIZE
  *   (resp. PLAT_PHY_ADDR_SPACE_SIZE) for the translation context describing the
  *   BL image currently executing.
+
+ * _base_table_section:
+ *   Specify the name of the section where the base translation tables have to
+ *   be placed by the linker.
  */
 #define REGISTER_XLAT_CONTEXT(_ctx_name, _mmap_count, _xlat_tables_count, \
-			_virt_addr_space_size, _phy_addr_space_size)	\
+			      _virt_addr_space_size, _phy_addr_space_size, \
+			      _base_table_section)			\
 	REGISTER_XLAT_CONTEXT_FULL_SPEC(_ctx_name, (_mmap_count),	\
 					 (_xlat_tables_count),		\
 					 (_virt_addr_space_size),	\
 					 (_phy_addr_space_size),	\
-					 EL_REGIME_INVALID, "xlat_table")
+					 EL_REGIME_INVALID,		\
+					 "xlat_table", (_base_table_section))
 
 /*
  * Same as REGISTER_XLAT_CONTEXT plus the additional parameters:
@@ -191,7 +197,9 @@ typedef struct xlat_ctx xlat_ctx_t;
 					 (_xlat_tables_count),		\
 					 (_virt_addr_space_size),	\
 					 (_phy_addr_space_size),	\
-					 (_xlat_regime), (_section_name))
+					 (_xlat_regime),		\
+					 (_section_name), ".bss"	\
+)
 
 /******************************************************************************
  * Generic translation table APIs.
diff --git a/include/lib/xlat_tables/xlat_tables_v2_helpers.h b/include/lib/xlat_tables/xlat_tables_v2_helpers.h
index c88fa4dd5..62f853d18 100644
--- a/include/lib/xlat_tables/xlat_tables_v2_helpers.h
+++ b/include/lib/xlat_tables/xlat_tables_v2_helpers.h
@@ -24,6 +24,7 @@
 #include <platform_def.h>
 
 #include <lib/cassert.h>
+#include <lib/utils_def.h>
 #include <lib/xlat_tables/xlat_tables_arch.h>
 #include <lib/xlat_tables/xlat_tables_defs.h>
 
@@ -135,7 +136,8 @@ struct xlat_ctx {
 
 #define REGISTER_XLAT_CONTEXT_FULL_SPEC(_ctx_name, _mmap_count,		\
 			_xlat_tables_count, _virt_addr_space_size,	\
-			_phy_addr_space_size, _xlat_regime, _section_name)\
+			_phy_addr_space_size, _xlat_regime,		\
+			_table_section, _base_table_section)		\
 	CASSERT(CHECK_PHY_ADDR_SPACE_SIZE(_phy_addr_space_size),	\
 		assert_invalid_physical_addr_space_sizefor_##_ctx_name);\
 									\
@@ -143,52 +145,13 @@ struct xlat_ctx {
 									\
 	static uint64_t _ctx_name##_xlat_tables[_xlat_tables_count]	\
 		[XLAT_TABLE_ENTRIES]					\
-		__aligned(XLAT_TABLE_SIZE) __section(_section_name);	\
-									\
-	static uint64_t _ctx_name##_base_xlat_table			\
-		[GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size)]	\
-		__aligned(GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size)\
-			* sizeof(uint64_t));				\
-									\
-	XLAT_ALLOC_DYNMAP_STRUCT(_ctx_name, _xlat_tables_count)		\
-									\
-	static xlat_ctx_t _ctx_name##_xlat_ctx = {			\
-		.pa_max_address = (_phy_addr_space_size) - 1ULL,	\
-		.va_max_address = (_virt_addr_space_size) - 1UL,	\
-		.mmap = _ctx_name##_mmap,				\
-		.mmap_num = (_mmap_count),				\
-		.tables = _ctx_name##_xlat_tables,			\
-		.tables_num = _xlat_tables_count,			\
-		 XLAT_CTX_INIT_TABLE_ATTR()				\
-		 XLAT_REGISTER_DYNMAP_STRUCT(_ctx_name)			\
-		.next_table = 0,					\
-		.base_table = _ctx_name##_base_xlat_table,		\
-		.base_table_entries =					\
-			GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size),\
-		.max_pa = 0U,						\
-		.max_va = 0U,						\
-		.base_level = GET_XLAT_TABLE_LEVEL_BASE(_virt_addr_space_size),\
-		.initialized = false,					\
-		.xlat_regime = (_xlat_regime)				\
-	}
-
-#define REGISTER_XLAT_CONTEXT_RO_BASE_TABLE(_ctx_name, _mmap_count,	\
-			_xlat_tables_count, _virt_addr_space_size,	\
-			_phy_addr_space_size, _xlat_regime, _section_name)\
-	CASSERT(CHECK_PHY_ADDR_SPACE_SIZE(_phy_addr_space_size),	\
-		assert_invalid_physical_addr_space_sizefor_##_ctx_name);\
-									\
-	static mmap_region_t _ctx_name##_mmap[_mmap_count + 1];		\
-									\
-	static uint64_t _ctx_name##_xlat_tables[_xlat_tables_count]	\
-		[XLAT_TABLE_ENTRIES]					\
-		__aligned(XLAT_TABLE_SIZE) __section(_section_name);	\
+		__aligned(XLAT_TABLE_SIZE) __section(_table_section);	\
 									\
 	static uint64_t _ctx_name##_base_xlat_table			\
 		[GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size)]	\
 		__aligned(GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size)\
 			* sizeof(uint64_t))				\
-		__section(".rodata");					\
+		__section(_base_table_section);				\
 									\
 	XLAT_ALLOC_DYNMAP_STRUCT(_ctx_name, _xlat_tables_count)		\
 									\
@@ -198,13 +161,13 @@ struct xlat_ctx {
 		.mmap = _ctx_name##_mmap,				\
 		.mmap_num = (_mmap_count),				\
 		.tables = _ctx_name##_xlat_tables,			\
-		.tables_num = _xlat_tables_count,			\
+		.tables_num = ARRAY_SIZE(_ctx_name##_xlat_tables),	\
 		 XLAT_CTX_INIT_TABLE_ATTR()				\
 		 XLAT_REGISTER_DYNMAP_STRUCT(_ctx_name)			\
 		.next_table = 0,					\
 		.base_table = _ctx_name##_base_xlat_table,		\
 		.base_table_entries =					\
-			GET_NUM_BASE_LEVEL_ENTRIES(_virt_addr_space_size),\
+			ARRAY_SIZE(_ctx_name##_base_xlat_table),	\
 		.max_pa = 0U,						\
 		.max_va = 0U,						\
 		.base_level = GET_XLAT_TABLE_LEVEL_BASE(_virt_addr_space_size),\