diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-22 12:44:32 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-24 08:48:45 +0100 |
| commit | 857c1b81f8dd2e2a97d859d7e53dd955e2ab55af (patch) | |
| tree | 4d13af4e3c0e6abafcb1e5abd0cc9000292f7ab6 | |
| parent | a9503d2185bbc28e498c435a07f24986c48b5cbe (diff) | |
ARM: pm: omap34xx: no need to save all registers in sleep34xx.S
The ABI allows called functions to corrupt r0-r3 and ip (r12). So
its pointless saving these registers in the suspend code - the
calling function will expect them to be corrupted and so won't rely
on their contents after resume.
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mach-omap2/sleep34xx.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 63f10669571..9551c7dc71e 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -133,7 +133,7 @@ ENDPROC(enable_omap3630_toggle_l2_on_restore) /* Function to call rom code to save secure ram context */ .align 3 ENTRY(save_secure_ram_context) - stmfd sp!, {r1-r12, lr} @ save registers on stack + stmfd sp!, {r4 - r11, lr} @ save registers on stack adr r3, api_params @ r3 points to parameters str r0, [r3,#0x4] @ r0 has sdram address ldr r12, high_mask @@ -152,7 +152,7 @@ ENTRY(save_secure_ram_context) nop nop nop - ldmfd sp!, {r1-r12, pc} + ldmfd sp!, {r4 - r11, pc} .align sram_phy_addr_mask: .word SRAM_BASE_P @@ -187,7 +187,7 @@ ENTRY(save_secure_ram_context_sz) */ .align 3 ENTRY(omap34xx_cpu_suspend) - stmfd sp!, {r0-r12, lr} @ save registers on stack + stmfd sp!, {r4 - r11, lr} @ save registers on stack /* * r0 contains CPU context save/restore pointer in sdram @@ -329,7 +329,7 @@ omap3_do_wfi: * == Exit point from non-OFF modes == * =================================== */ - ldmfd sp!, {r0-r12, pc} @ restore regs and return + ldmfd sp!, {r4 - r11, pc} @ restore regs and return /* @@ -572,7 +572,7 @@ usettbr0: * ============================== */ restoremmu_on: - ldmfd sp!, {r0-r12, pc} @ restore regs and return + ldmfd sp!, {r4 - r11, pc} @ restore regs and return /* |