-Original Message-
From: linux-omap-ow...@vger.kernel.org
[mailto:linux-omap-ow...@vger.kernel.org] On Behalf Of Tero
Kristo
Sent: Thursday, November 12, 2009 3:37 PM
To: linux-omap@vger.kernel.org
Subject: [PATCH 1/5] OMAP3: Fixed ARM aux ctrl register save/restore
From: Tero Kristo tero.kri...@nokia.com
Current value is stored on SDRAM and it is written back during wakeup.
Previously a static value of 0x72 was written there.
Signed-off-by: Tero Kristo tero.kri...@nokia.com
---
arch/arm/mach-omap2/sleep34xx.S | 13 +
1 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S
index 4707ba8..8bd5fc5 100644
--- a/arch/arm/mach-omap2/sleep34xx.S
+++ b/arch/arm/mach-omap2/sleep34xx.S
@@ -278,7 +278,8 @@ restore:
mov r1, #0 @ set task id for ROM code in r1
mov r2, #4 @ set some flags in r2, r6
mov r6, #0xff
- adr r3, write_aux_control_params@ r3 points to parameters
+ ldr r4, scratchpad_base
+ ldr r3, [r4, #0xBC] @ r3 points to parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
.word 0xE1600071 @ call SMI monitor (smi #1)
@@ -286,14 +287,14 @@ restore:
b logic_l1_restore
l2_inv_api_params:
.word 0x1, 0x00
-write_aux_control_params:
- .word 0x1, 0x72
l2_inv_gp:
/* Execute smi to invalidate L2 cache */
mov r12, #0x1 @ set up to invalide L2
smi:.word 0xE1600070 @ Call SMI monitor (smieq)
/* Write to Aux control register to set some bits */
- mov r0, #0x72
+ ldr r4, scratchpad_base
+ ldr r3, [r4,#0xBC]
+ ldr r0, [r3,#4]
mov r12, #0x3
.word 0xE1600070@ Call SMI monitor (smieq)
logic_l1_restore:
@@ -304,6 +305,7 @@ logic_l1_restore:
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
+ addsr3, r3, #8
ldmia r3!, {r4-r6}
mov sp, r4
msr spsr_cxsf, r5
@@ -420,6 +422,9 @@ usettbr0:
save_context_wfi:
/*b save_context_wfi*/ @ enable to debug save code
mov r8, r0 /* Store SDRAM address in r8 */
+ mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register
+ mov r4, #0x1@ Number of parameters for restore call
+ stmia r8!, {r4-r5}
/* Check what that target sleep state is:stored in r1*/
/* 1 - Only L1 and logic lost */
/* 2 - Only L2 lost */
Looks Ok to me. Acked.
--
1.5.4.3
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