Merge pull request #1429 from jeenu-arm/mmu-direct

Enable MMU without stack for xlat v2/DynamIQ

lib/xlat_tables_v2/xlat_tables_internal.c

@@ -802,7 +802,7 @@ void mmap_add_region_ctx(xlat_ctx_t *ctx, const mmap_region_t *mm)
 	 * that there is free space.
 	 */
 	assert(mm_last->size == 0U);
-	
+
 	/* Make room for new region by moving other regions up by one place */
 	mm_destination = mm_cursor + 1;
 	memmove(mm_destination, mm_cursor,
@@ -1313,22 +1313,25 @@ void init_xlat_tables(void)
 
 void enable_mmu_secure(unsigned int flags)
 {
-	enable_mmu_arch(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR,
+	setup_mmu_cfg(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR,
 			tf_xlat_ctx.va_max_address);
+	enable_mmu_direct(flags);
 }
 
 #else
 
 void enable_mmu_el1(unsigned int flags)
 {
-	enable_mmu_arch(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR,
+	setup_mmu_cfg(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR,
 			tf_xlat_ctx.va_max_address);
+	enable_mmu_direct_el1(flags);
 }
 
 void enable_mmu_el3(unsigned int flags)
 {
-	enable_mmu_arch(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR,
+	setup_mmu_cfg(flags, tf_xlat_ctx.base_table, MAX_PHYS_ADDR,
 			tf_xlat_ctx.va_max_address);
+	enable_mmu_direct_el3(flags);
 }
 
 #endif /* AARCH32 */

lib/xlat_tables_v2/xlat_tables_private.h

@@ -81,7 +81,7 @@ int xlat_arch_current_el(void);
 unsigned long long xlat_arch_get_max_supported_pa(void);
 
 /* Enable MMU and configure it to use the specified translation tables. */
-void enable_mmu_arch(unsigned int flags, uint64_t *base_table,
+void setup_mmu_cfg(unsigned int flags, const uint64_t *base_table,
 		unsigned long long max_pa, uintptr_t max_va);
 
 /*

plat/common/aarch64/plat_common.c

@@ -18,8 +18,6 @@
  * provide typical implementations that may be re-used by multiple
  * platforms but may also be overridden by a platform if required.
  */
-#pragma weak bl31_plat_enable_mmu
-#pragma weak bl32_plat_enable_mmu
 #pragma weak bl31_plat_runtime_setup
 #if !ERROR_DEPRECATED
 #pragma weak plat_get_syscnt_freq2
@@ -33,16 +31,6 @@
 
 #pragma weak plat_ea_handler
 
-void bl31_plat_enable_mmu(uint32_t flags)
-{
-	enable_mmu_el3(flags);
-}
-
-void bl32_plat_enable_mmu(uint32_t flags)
-{
-	enable_mmu_el1(flags);
-}
-
 void bl31_plat_runtime_setup(void)
 {
 #if MULTI_CONSOLE_API

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 @@ func plat_panic_handler
 	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