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-rw-r--r--src/arch/arm64/stage_entry.S12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/arch/arm64/stage_entry.S b/src/arch/arm64/stage_entry.S
index c18c9cfeaa..4c26f65707 100644
--- a/src/arch/arm64/stage_entry.S
+++ b/src/arch/arm64/stage_entry.S
@@ -55,6 +55,16 @@ ENTRY(arm64_el3_startup)
and x0, x0, x1
msr SCR_EL3, x0
+ /* Initialize SP_EL3 as exception stack */
+ ldr x0, .exception_stack_top
+ cmp x0, #0
+ b.eq 2f
+ msr SPSel, #1
+ isb
+
+ mov sp, x0
+
+ 2:
/* Have stack pointer use SP_EL0. */
msr SPSel, #0
isb
@@ -81,6 +91,8 @@ ENTRY(arm64_el3_startup)
* to the Kconfig option for cpu0. However, this code can be relocated
* and reused to start up secondary cpus.
*/
+ .exception_stack_top:
+ .quad CONFIG_EXCEPTION_STACK_TOP
.stack_top:
.quad _estack
.entry: