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ARMv7 may not support large page addressing 

ARCH_SUPPORTS_LARGE_PAGE_ADDRESSING allows build environment to
handle specific case when target ARMv7 core only supports 32bit MMU
descriptor mode.

If ARMv7 based platform does not set ARM_CORTEX_Ax=yes, platform
shall define ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING to enable
large page addressing support.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
This commit is contained in:
Etienne Carriere 2017-11-08 13:53:47 +01:00
parent 1ca8d02316
commit 51b992ecec
3 changed files with 17 additions and 0 deletions
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4
lib/xlat_tables/aarch32/xlat_tables.c
View File

@ -13,6 +13,10 @@
#include <xlat_tables.h>
#include "../xlat_tables_private.h"
#if ARM_ARCH_MAJOR == 7 && !defined(ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING)
#error ARMv7 target does not support LPAE MMU descriptors
#endif
#define XLAT_TABLE_LEVEL_BASE \
GET_XLAT_TABLE_LEVEL_BASE(PLAT_VIRT_ADDR_SPACE_SIZE)

4
lib/xlat_tables_v2/aarch32/xlat_tables_arch.c
View File

@ -14,6 +14,10 @@
#include <xlat_tables_v2.h>
#include "../xlat_tables_private.h"
#if ARM_ARCH_MAJOR == 7 && !defined(ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING)
#error ARMv7 target does not support LPAE MMU descriptors
#endif
#if ENABLE_ASSERTIONS
unsigned long long xlat_arch_get_max_supported_pa(void)
{

9
make_helpers/armv7-a-cpus.mk
View File

@ -31,3 +31,12 @@ march32-neon-$(ARM_WITH_NEON) := -mfpu=neon
march32-set-yes ?= -march=armv7-a
march32-directive := ${march32-set-yes} ${march32-neon-yes}
endif
# Platform may override these extension support directives:
#
# ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING
# Defined if core supports the Large Page Addressing extension.
ifeq ($(filter yes,$(ARM_CORTEX_A7) $(ARM_CORTEX_A12) $(ARM_CORTEX_A15) $(ARM_CORTEX_A17)),yes)
$(eval $(call add_define,ARMV7_SUPPORTS_LARGE_PAGE_ADDRESSING))
endif