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authorChen-Yu Tsai <wens@csie.org>2016-06-19 12:38:44 +0800
committerHans de Goede <hdegoede@redhat.com>2016-07-15 15:54:58 +0200
commit6e6622de166f53597172687b7269b07cf48844df (patch)
tree8a89c350dff56f3ee34cc7fe721a7864179c8c86 /arch/arm/mach-tegra/psci.S
parent45c334e6b22bae75ada8662b88000c4347b1361b (diff)
ARM: PSCI: Switch to per-CPU target PC storage in secure data section
Now that we have a secure data section and space to store per-CPU target PC address, switch to it instead of storing the target PC on the stack. Also save clobbered r4-r7 registers on the stack and restore them on return in psci_cpu_on for Tegra, i.MX7, and LS102xA platforms. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'arch/arm/mach-tegra/psci.S')
-rw-r--r--arch/arm/mach-tegra/psci.S11
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/arm/mach-tegra/psci.S b/arch/arm/mach-tegra/psci.S
index 85d5b6b59d..645d08fa0b 100644
--- a/arch/arm/mach-tegra/psci.S
+++ b/arch/arm/mach-tegra/psci.S
@@ -85,12 +85,13 @@ _loop: wfi
ENDPROC(psci_cpu_off)
ENTRY(psci_cpu_on)
- push {lr}
+ push {r4, r5, r6, lr}
+ mov r4, r1
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
+ mov r1, r2
+ bl psci_save_target_pc @ store target PC
+ mov r1, r4
ldr r6, =TEGRA_RESET_EXCEPTION_VECTOR
ldr r5, =psci_cpu_entry
@@ -103,7 +104,7 @@ ENTRY(psci_cpu_on)
str r5, [r6, r2]
mov r0, #ARM_PSCI_RET_SUCCESS @ Return PSCI_RET_SUCCESS
- pop {pc}
+ pop {r4, r5, r6, pc}
ENDPROC(psci_cpu_on)
.popsection