xlat_tables_v2: add base table section name parameter for spm_mm

Core spm_mm code expects the translation tables are located in the
inner & outer WBWA & shareable memory.
REGISTER_XLAT_CONTEXT2 macro is used to specify the translation
table section in spm_mm.

In the commit 363830df1c (xlat_tables_v2: merge
REGISTER_XLAT_CONTEXT_{FULL_SPEC,RO_BASE_TABLE}), REGISTER_XLAT_CONTEXT2
macro explicitly specifies the base xlat table goes into .bss by default.
This change affects the existing SynQuacer spm_mm implementation.
plat/socionext/synquacer/include/plat.ld.S linker script intends to
locate ".bss.sp_base_xlat_table" into "sp_xlat_table" section,
but this implementation is no longer available.

This patch adds the base table section name parameter for
REGISTER_XLAT_CONTEXT2 so that platform can specify the
inner & outer WBWA & shareable memory for spm_mm base xlat table.
If PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME is not defined, base xlat table
goes into .bss by default, the result is same as before.

Change-Id: Ie0e1a235e5bd4288dc376f582d6c44c5df6d31b2
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>

include/lib/xlat_tables/xlat_tables_v2.h

@@ -201,16 +201,20 @@ typedef struct xlat_ctx xlat_ctx_t;
  * _section_name:
  *   Specify the name of the section where the translation tables have to be
  *   placed by the linker.
+ *
+ * _base_table_section_name:
+ *   Specify the name of the section where the base translation tables have to
+ *   be placed by the linker.
  */
 #define REGISTER_XLAT_CONTEXT2(_ctx_name, _mmap_count, _xlat_tables_count, \
 			_virt_addr_space_size, _phy_addr_space_size,	\
-			_xlat_regime, _section_name)			\
+			_xlat_regime, _section_name, _base_table_section_name) \
 	REGISTER_XLAT_CONTEXT_FULL_SPEC(_ctx_name, (_mmap_count),	\
 					 (_xlat_tables_count),		\
 					 (_virt_addr_space_size),	\
 					 (_phy_addr_space_size),	\
 					 (_xlat_regime),		\
-					 (_section_name), ".bss"	\
+					 (_section_name), (_base_table_section_name) \
 )
 
 /******************************************************************************

plat/socionext/synquacer/include/plat.ld.S

@@ -25,7 +25,6 @@ SECTIONS
 	 */
 	sp_xlat_table (NOLOAD) : ALIGN(PAGE_SIZE) {
 		*(sp_xlat_table)
-		*(.bss.sp_base_xlat_table)
 	} >SP_DRAM
 }
 

plat/socionext/synquacer/include/platform_def.h

@@ -144,6 +144,7 @@
 #define PLAT_SP_IMAGE_MMAP_REGIONS	30
 #define PLAT_SP_IMAGE_MAX_XLAT_TABLES	20
 #define PLAT_SP_IMAGE_XLAT_SECTION_NAME	"sp_xlat_table"
+#define PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME	"sp_xlat_table"
 
 #define PLAT_SQ_UART1_BASE		PLAT_SQ_BOOT_UART_BASE
 #define PLAT_SQ_UART1_SIZE		ULL(0x1000)

services/std_svc/spm_mm/spm_mm_xlat.c

@@ -21,13 +21,17 @@
 #ifndef PLAT_SP_IMAGE_XLAT_SECTION_NAME
 #define PLAT_SP_IMAGE_XLAT_SECTION_NAME	"xlat_table"
 #endif
+#ifndef PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME
+#define PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME	".bss"
+#endif
 
 /* Allocate and initialise the translation context for the secure partitions. */
 REGISTER_XLAT_CONTEXT2(sp,
 		       PLAT_SP_IMAGE_MMAP_REGIONS,
 		       PLAT_SP_IMAGE_MAX_XLAT_TABLES,
 		       PLAT_VIRT_ADDR_SPACE_SIZE, PLAT_PHY_ADDR_SPACE_SIZE,
-		       EL1_EL0_REGIME, PLAT_SP_IMAGE_XLAT_SECTION_NAME);
+		       EL1_EL0_REGIME, PLAT_SP_IMAGE_XLAT_SECTION_NAME,
+		       PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME);
 
 /* Lock used for SP_MEMORY_ATTRIBUTES_GET and SP_MEMORY_ATTRIBUTES_SET */
 static spinlock_t mem_attr_smc_lock;