diff options
Diffstat (limited to 'arch/arm/cpu/armv7/psci.S')
| -rw-r--r-- | arch/arm/cpu/armv7/psci.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S index 7d89b43983..18d85c4d56 100644 --- a/arch/arm/cpu/armv7/psci.S +++ b/arch/arm/cpu/armv7/psci.S @@ -193,6 +193,20 @@ ENTRY(psci_cpu_off_common) bx lr ENDPROC(psci_cpu_off_common) +@ expects CPU ID in r0 and returns stack top in r0 +ENTRY(psci_get_cpu_stack_top) + mov r5, #0x400 @ 1kB of stack per CPU + mul r0, r0, r5 + + ldr r5, =psci_text_end @ end of monitor text + add r5, r5, #0x2000 @ Skip two pages + lsr r5, r5, #12 @ Align to start of page + lsl r5, r5, #12 + sub r0, r5, r0 @ here's our stack! + + bx lr +ENDPROC(psci_get_cpu_stack_top) + ENTRY(psci_cpu_entry) bl psci_enable_smp |