diff options
| author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-04-21 07:18:30 +0200 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2015-05-13 09:24:14 -0700 |
| commit | 3317b988b16b7499d2c28175d4bb77f6e04cf447 (patch) | |
| tree | 4e9e0de104a8fadf3de07926b51f56a4ec6ea23b /arch | |
| parent | 4c681a3d22f0018186d83d753be566965c0cf7a5 (diff) | |
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 <marc.zyngier@arm.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Tested-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/psci.S | 11 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/psci.S | 9 |
2 files changed, 11 insertions, 9 deletions
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 <config.h> #include <linux/linkage.h> +#include <asm/macro.h> #include <asm/psci.h> .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 diff --git a/arch/arm/cpu/armv7/sunxi/psci.S b/arch/arm/cpu/armv7/sunxi/psci.S index dd583b2a94..7ec0500fac 100644 --- a/arch/arm/cpu/armv7/sunxi/psci.S +++ b/arch/arm/cpu/armv7/sunxi/psci.S @@ -139,8 +139,11 @@ out: mcr p15, 0, r7, c1, c1, 0 @ r2 = target PC .globl psci_cpu_on psci_cpu_on: - ldr r0, =_psci_target_pc - str r2, [r0] + push {lr} + + mov r0, r1 + bl psci_get_cpu_stack_top @ get stack top of target CPU + str r2, [r0] @ store target PC at stack top dsb movw r0, #(SUN7I_CPUCFG_BASE & 0xffff) @@ -195,7 +198,7 @@ psci_cpu_on: str r6, [r0, #0x1e4] mov r0, #ARM_PSCI_RET_SUCCESS @ Return PSCI_RET_SUCCESS - mov pc, lr + pop {pc} .globl psci_cpu_off psci_cpu_off: |