DynamIQ: Enable MMU without using stack
Having an active stack while enabling MMU has shown coherency problems.
This patch builds on top of translation library changes that introduces
MMU-enabling without using stacks.
Previously, with HW_ASSISTED_COHERENCY, data caches were disabled while
enabling MMU only because of active stack. Now that we can enable MMU
without using stack, we can enable both MMU and data caches at the same
time.
NOTE: Since this feature depends on using translation table library v2,
disallow using translation table library v1 with HW_ASSISTED_COHERENCY.
Fixes ARM-software/tf-issues#566
Change-Id: Ie55aba0c23ee9c5109eb3454cb8fa45d74f8bbb2
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/plat/common/aarch64/platform_helpers.S b/plat/common/aarch64/platform_helpers.S
index 033a12f..a413f5f 100644
--- a/plat/common/aarch64/platform_helpers.S
+++ b/plat/common/aarch64/platform_helpers.S
@@ -17,6 +17,8 @@
.weak plat_disable_acp
.weak bl1_plat_prepare_exit
.weak plat_panic_handler
+ .weak bl31_plat_enable_mmu
+ .weak bl32_plat_enable_mmu
#if !ENABLE_PLAT_COMPAT
.globl platform_get_core_pos
@@ -164,3 +166,23 @@
wfi
b plat_panic_handler
endfunc plat_panic_handler
+
+ /* -----------------------------------------------------
+ * void bl31_plat_enable_mmu(uint32_t flags);
+ *
+ * Enable MMU in BL31.
+ * -----------------------------------------------------
+ */
+func bl31_plat_enable_mmu
+ b enable_mmu_direct_el3
+endfunc bl31_plat_enable_mmu
+
+ /* -----------------------------------------------------
+ * void bl32_plat_enable_mmu(uint32_t flags);
+ *
+ * Enable MMU in BL32.
+ * -----------------------------------------------------
+ */
+func bl32_plat_enable_mmu
+ b enable_mmu_direct_el1
+endfunc bl32_plat_enable_mmu