diff --git a/arch/arm64/core/smp.c b/arch/arm64/core/smp.c
index 3fdb1b333d5..6d21e5e9d7b 100644
--- a/arch/arm64/core/smp.c
+++ b/arch/arm64/core/smp.c
@@ -141,12 +141,13 @@ void z_arm64_secondary_start(void)
 
 	/* Initialize tpidrro_el0 with our struct _cpu instance address */
 	write_tpidrro_el0((uintptr_t)&_kernel.cpus[cpu_num]);
+
+	z_arm64_mm_init(false);
+
 #ifdef CONFIG_ARM64_SAFE_EXCEPTION_STACK
 	z_arm64_safe_exception_stack_init();
 #endif
 
-	z_arm64_mm_init(false);
-
 #ifdef CONFIG_SMP
 	arm_gic_secondary_init();
 
diff --git a/include/zephyr/arch/arm64/cortex_r/arm_mpu.h b/include/zephyr/arch/arm64/cortex_r/arm_mpu.h
index 74426005fb7..077b6664fb1 100644
--- a/include/zephyr/arch/arm64/cortex_r/arm_mpu.h
+++ b/include/zephyr/arch/arm64/cortex_r/arm_mpu.h
@@ -143,7 +143,7 @@
 #define REGION_RAM_ATTR							\
 	{								\
 		/* AP, XN, SH */					\
-		.rbar = NOT_EXEC | P_RW_U_NA_Msk | INNER_SHAREABLE_Msk, \
+		.rbar = NOT_EXEC | P_RW_U_NA_Msk | OUTER_SHAREABLE_Msk, \
 		/* Cache-ability */					\
 		.mair_idx = MPU_MAIR_INDEX_SRAM,			\
 	}