From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/5] ARM: pm: convert sa11x0 to generic suspend/resume support
Date: Sun, 06 Feb 2011 19:13:25 +0000 [thread overview]
Message-ID: <E1PmA33-0000AO-Uj@rmk-PC.arm.linux.org.uk> (raw)
In-Reply-To: <20110206191117.GA17808@n2100.arm.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/mach-sa1100/pm.c | 12 ++-----
arch/arm/mach-sa1100/sleep.S | 72 ++---------------------------------------
2 files changed, 7 insertions(+), 77 deletions(-)
diff --git a/arch/arm/mach-sa1100/pm.c b/arch/arm/mach-sa1100/pm.c
index ab9fc44..c4661aa 100644
--- a/arch/arm/mach-sa1100/pm.c
+++ b/arch/arm/mach-sa1100/pm.c
@@ -32,8 +32,7 @@
#include <asm/system.h>
#include <asm/mach/time.h>
-extern void sa1100_cpu_suspend(void);
-extern void sa1100_cpu_resume(void);
+extern void sa1100_cpu_suspend(long);
#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
@@ -73,10 +72,10 @@ static int sa11x0_pm_enter(suspend_state_t state)
RCSR = RCSR_HWR | RCSR_SWR | RCSR_WDR | RCSR_SMR;
/* set resume return address */
- PSPR = virt_to_phys(sa1100_cpu_resume);
+ PSPR = virt_to_phys(cpu_resume);
/* go zzz */
- sa1100_cpu_suspend();
+ sa1100_cpu_suspend(PHYS_OFFSET - PAGE_OFFSET);
cpu_init();
@@ -115,11 +114,6 @@ static int sa11x0_pm_enter(suspend_state_t state)
return 0;
}
-unsigned long sleep_phys_sp(void *sp)
-{
- return virt_to_phys(sp);
-}
-
static const struct platform_suspend_ops sa11x0_pm_ops = {
.enter = sa11x0_pm_enter,
.valid = suspend_valid_only_mem,
diff --git a/arch/arm/mach-sa1100/sleep.S b/arch/arm/mach-sa1100/sleep.S
index 80f31ba..04f2a61 100644
--- a/arch/arm/mach-sa1100/sleep.S
+++ b/arch/arm/mach-sa1100/sleep.S
@@ -20,12 +20,7 @@
#include <asm/assembler.h>
#include <mach/hardware.h>
-
-
.text
-
-
-
/*
* sa1100_cpu_suspend()
*
@@ -34,27 +29,10 @@
*/
ENTRY(sa1100_cpu_suspend)
-
stmfd sp!, {r4 - r12, lr} @ save registers on stack
-
- @ get coprocessor registers
- mrc p15, 0, r4, c3, c0, 0 @ domain ID
- mrc p15, 0, r5, c2, c0, 0 @ translation table base addr
- mrc p15, 0, r6, c13, c0, 0 @ PID
- mrc p15, 0, r7, c1, c0, 0 @ control reg
-
- @ store them plus current virtual stack ptr on stack
- mov r8, sp
- stmfd sp!, {r4 - r8}
-
- @ preserve phys address of stack
- mov r0, sp
- bl sleep_phys_sp
- ldr r1, =sleep_save_sp
- str r0, [r1]
-
- @ clean data cache and invalidate WB
- bl v4wb_flush_kern_cache_all
+ mov r1, r0
+ ldr r3, =sa1100_cpu_resume @ return function
+ bl cpu_suspend
@ disable clock switching
mcr p15, 0, r1, c15, c2, 2
@@ -166,50 +144,8 @@ sa1110_sdram_controller_fix:
* cpu_sa1100_resume()
*
* entry point from bootloader into kernel during resume
- *
- * Note: Yes, part of the following code is located into the .data section.
- * This is to allow sleep_save_sp to be accessed with a relative load
- * while we can't rely on any MMU translation. We could have put
- * sleep_save_sp in the .text section as well, but some setups might
- * insist on it to be truly read-only.
*/
-
- .data
- .align 5
-ENTRY(sa1100_cpu_resume)
- mov r0, #PSR_F_BIT | PSR_I_BIT | SVC_MODE
- msr cpsr_c, r0 @ set SVC, irqs off
-
- ldr r0, sleep_save_sp @ stack phys addr
- ldr r2, =resume_after_mmu @ its absolute virtual address
- ldmfd r0, {r4 - r7, sp} @ CP regs + virt stack ptr
-
- mov r1, #0
- mcr p15, 0, r1, c8, c7, 0 @ flush I+D TLBs
- mcr p15, 0, r1, c7, c7, 0 @ flush I&D cache
- mcr p15, 0, r1, c9, c0, 0 @ invalidate RB
- mcr p15, 0, r1, c9, c0, 5 @ allow user space to use RB
-
- mcr p15, 0, r4, c3, c0, 0 @ domain ID
- mcr p15, 0, r5, c2, c0, 0 @ translation table base addr
- mcr p15, 0, r6, c13, c0, 0 @ PID
- b resume_turn_on_mmu @ cache align execution
-
.align 5
-resume_turn_on_mmu:
- mcr p15, 0, r7, c1, c0, 0 @ turn on MMU, caches, etc.
- nop
- mov pc, r2 @ jump to virtual addr
- nop
- nop
- nop
-
-sleep_save_sp:
- .word 0 @ preserve stack phys ptr here
-
- .text
-resume_after_mmu:
+sa1100_cpu_resume:
mcr p15, 0, r1, c15, c1, 2 @ enable clock switching
ldmfd sp!, {r4 - r12, pc} @ return to caller
-
-
--
1.6.2.5
next prev parent reply other threads:[~2011-02-06 19:13 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-06 19:11 [RFC] Generic CPU save/restore PM support Russell King - ARM Linux
2011-02-06 19:12 ` [PATCH 1/5] ARM: move cache/processor/fault glue to separate include files Russell King - ARM Linux
2011-02-06 19:12 ` [PATCH 2/5] ARM: pm: add generic CPU suspend/resume support Russell King - ARM Linux
2011-02-07 12:01 ` [PATCH v2 " Russell King - ARM Linux
2011-02-07 12:10 ` [PATCH v3 " Russell King - ARM Linux
2011-02-07 13:21 ` saeed bishara
2011-02-07 13:34 ` Russell King - ARM Linux
2011-02-07 14:04 ` saeed bishara
2011-02-07 14:17 ` Russell King - ARM Linux
2011-02-07 14:27 ` saeed bishara
2011-02-07 14:33 ` Russell King - ARM Linux
2011-02-07 14:58 ` saeed bishara
2011-02-07 15:02 ` Russell King - ARM Linux
2011-02-08 10:21 ` Lorenzo Pieralisi
2011-02-08 11:23 ` Russell King - ARM Linux
2011-02-08 12:33 ` Russell King - ARM Linux
2011-02-08 14:25 ` Lorenzo Pieralisi
2011-02-08 8:08 ` Colin Cross
2011-02-10 3:15 ` Colin Cross
2011-02-11 11:58 ` Russell King - ARM Linux
2011-02-11 12:07 ` Santosh Shilimkar
2011-02-12 14:50 ` Russell King - ARM Linux
2011-02-12 15:09 ` Santosh Shilimkar
2011-02-28 18:17 ` Santosh Shilimkar
2011-02-28 18:17 ` Santosh Shilimkar
2011-02-28 18:21 ` Jean Pihet
2011-02-14 0:27 ` Kukjin Kim
2011-02-06 19:13 ` [PATCH 3/5] ARM: pm: convert PXA to generic " Russell King - ARM Linux
2011-02-06 19:13 ` Russell King - ARM Linux [this message]
2011-02-07 18:11 ` [PATCH 4/5] ARM: pm: convert sa11x0 " Russell King - ARM Linux
2011-02-06 19:13 ` [PATCH 5/5] ARM: pm: convert samsung platforms " Russell King - ARM Linux
2011-02-07 5:42 ` [RFC] Generic CPU save/restore PM support Kukjin Kim
2011-02-07 10:44 ` Russell King - ARM Linux
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