Make enablement of the MMU more flexible
This patch adds a 'flags' parameter to each exception level specific function
responsible for enabling the MMU. At present only a single flag which indicates
whether the data cache should also be enabled is implemented. Subsequent patches
will use this flag when enabling the MMU in the warm boot paths.
Change-Id: I0eafae1e678c9ecc604e680851093f1680e9cefa
diff --git a/lib/aarch64/xlat_tables.c b/lib/aarch64/xlat_tables.c
index f1d658d..d494112 100644
--- a/lib/aarch64/xlat_tables.c
+++ b/lib/aarch64/xlat_tables.c
@@ -292,7 +292,7 @@
* exception level
******************************************************************************/
#define DEFINE_ENABLE_MMU_EL(_el, _tcr_extra, _tlbi_fct) \
- void enable_mmu_el##_el(void) \
+ void enable_mmu_el##_el(uint32_t flags) \
{ \
uint64_t mair, tcr, ttbr; \
uint32_t sctlr; \
@@ -330,7 +330,13 @@
\
sctlr = read_sctlr_el##_el(); \
sctlr |= SCTLR_WXN_BIT | SCTLR_M_BIT | SCTLR_I_BIT; \
- sctlr |= SCTLR_A_BIT | SCTLR_C_BIT; \
+ sctlr |= SCTLR_A_BIT; \
+ \
+ if (flags & DISABLE_DCACHE) \
+ sctlr &= ~SCTLR_C_BIT; \
+ else \
+ sctlr |= SCTLR_C_BIT; \
+ \
write_sctlr_el##_el(sctlr); \
\
/* Ensure the MMU enable takes effect immediately */ \