diff options
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/arm64/stage_entry.S | 12 |
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: |