From 3317b988b16b7499d2c28175d4bb77f6e04cf447 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 21 Apr 2015 07:18:30 +0200 Subject: ARM: Put target PC for PSCI CPU_ON on per-CPU stack Use a per-CPU variable for saving the target PC during CPU_ON operations. This allows us to run this service independently on targets that have more than 2 cores and also core-local power control. CC: Marc Zyngier Signed-off-by: Jan Kiszka Reviewed-by: Tom Rini Reviewed-by: Thierry Reding Tested-by: Thierry Reding Tested-by: Ian Campbell Signed-off-by: Tom Warren --- arch/arm/cpu/armv7/psci.S | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'arch/arm/cpu/armv7/psci.S') diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S index 18d85c4d56..87c0c0b6f5 100644 --- a/arch/arm/cpu/armv7/psci.S +++ b/arch/arm/cpu/armv7/psci.S @@ -17,6 +17,7 @@ #include #include +#include #include .pushsection ._secure.text, "ax" @@ -202,6 +203,7 @@ ENTRY(psci_get_cpu_stack_top) add r5, r5, #0x2000 @ Skip two pages lsr r5, r5, #12 @ Align to start of page lsl r5, r5, #12 + sub r5, r5, #4 @ reserve 1 word for target PC sub r0, r5, r0 @ here's our stack! bx lr @@ -212,13 +214,10 @@ ENTRY(psci_cpu_entry) bl _nonsec_init - adr r0, _psci_target_pc - ldr r0, [r0] + bl psci_get_cpu_id @ CPU ID => r0 + bl psci_get_cpu_stack_top @ stack top => r0 + ldr r0, [r0] @ target PC at stack top b _do_nonsec_entry ENDPROC(psci_cpu_entry) -.globl _psci_target_pc -_psci_target_pc: - .word 0 - .popsection -- cgit v1.2.1