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ARM: pm: pxa: move cpu_suspend into C code 

We don't need a veneer for cpu_suspend, it can be called directly from
C code now.  Move it into the PXA CPU suspend functions, along with
the accumulator register saving/restoring.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-06-21 16:29:30 +01:00
parent 372c0ac8ac
commit a9503d2185
6 changed files with 33 additions and 59 deletions
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4
arch/arm/mach-pxa/include/mach/pm.h
View File

@ -22,8 +22,8 @@ struct pxa_cpu_pm_fns {
extern struct pxa_cpu_pm_fns *pxa_cpu_pm_fns;
/* sleep.S */
extern void pxa25x_cpu_suspend(unsigned int, long);
extern void pxa27x_cpu_suspend(unsigned int, long);
extern void pxa25x_finish_suspend(unsigned long);
extern void pxa27x_finish_suspend(unsigned long);
extern int pxa_pm_enter(suspend_state_t state);
extern int pxa_pm_prepare(void);

3
arch/arm/mach-pxa/pxa25x.c
View File

@ -244,7 +244,8 @@ static void pxa25x_cpu_pm_enter(suspend_state_t state)
switch (state) {
case PM_SUSPEND_MEM:
pxa25x_cpu_suspend(PWRMODE_SLEEP, PLAT_PHYS_OFFSET - PAGE_OFFSET);
cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, PWRMODE_SLEEP,
pxa25x_finish_suspend);
break;
}
}

11
arch/arm/mach-pxa/pxa27x.c
View File

@ -284,6 +284,11 @@ void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
void pxa27x_cpu_pm_enter(suspend_state_t state)
{
extern void pxa_cpu_standby(void);
#ifndef CONFIG_IWMMXT
u64 acc0;
asm volatile("mra %Q0, %R0, acc0" : "=r" (acc0));
#endif
/* ensure voltage-change sequencer not initiated, which hangs */
PCFR &= ~PCFR_FVC;
@ -299,7 +304,11 @@ void pxa27x_cpu_pm_enter(suspend_state_t state)
pxa_cpu_standby();
break;
case PM_SUSPEND_MEM:
pxa27x_cpu_suspend(pwrmode, PLAT_PHYS_OFFSET - PAGE_OFFSET);
cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, pwrmode,
pxa27x_finish_suspend);
#ifndef CONFIG_IWMMXT
asm volatile("mar acc0, %Q0, %R0" : "=r" (acc0));
#endif
break;
}
}

13
arch/arm/mach-pxa/pxa3xx.c
View File

@ -141,8 +141,13 @@ static void pxa3xx_cpu_pm_suspend(void)
{
volatile unsigned long *p = (volatile void *)0xc0000000;
unsigned long saved_data = *p;
#ifndef CONFIG_IWMMXT
u64 acc0;
extern void pxa3xx_cpu_suspend(long);
asm volatile("mra %Q0, %R0, acc0" : "=r" (acc0));
#endif
extern void pxa3xx_finish_suspend(unsigned long);
/* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */
CKENA |= (1 << CKEN_BOOT) | (1 << CKEN_TPM);
@ -162,11 +167,15 @@ static void pxa3xx_cpu_pm_suspend(void)
/* overwrite with the resume address */
*p = virt_to_phys(cpu_resume);
pxa3xx_cpu_suspend(PLAT_PHYS_OFFSET - PAGE_OFFSET);
cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, 0, pxa3xx_finish_suspend);
*p = saved_data;
AD3ER = 0;
#ifndef CONFIG_IWMMXT
asm volatile("mar acc0, %Q0, %R0" : "=r" (acc0));
#endif
}
static void pxa3xx_cpu_pm_enter(suspend_state_t state)

58
arch/arm/mach-pxa/sleep.S
View File

@ -24,22 +24,9 @@
#ifdef CONFIG_PXA3xx
/*
* pxa3xx_cpu_suspend() - forces CPU into sleep state (S2D3C4)
*
* r0 = v:p offset
* pxa3xx_finish_suspend() - forces CPU into sleep state (S2D3C4)
*/
ENTRY(pxa3xx_cpu_suspend)
#ifndef CONFIG_IWMMXT
mra r2, r3, acc0
#endif
stmfd sp!, {r2 - r12, lr} @ save registers on stack
mov r1, r0
adr r3, BSYM(pxa3xx_finish_suspend)
bl cpu_suspend
b pxa_cpu_resume
pxa3xx_finish_suspend:
ENTRY(pxa3xx_finish_suspend)
mov r0, #0x06 @ S2D3C4 mode
mcr p14, 0, r0, c7, c0, 0 @ enter sleep
@ -48,25 +35,13 @@ pxa3xx_finish_suspend:
#ifdef CONFIG_PXA27x
/*
* pxa27x_cpu_suspend()
* pxa27x_finish_suspend()
*
* Forces CPU into sleep state.
*
* r0 = value for PWRMODE M field for desired sleep state
* r1 = v:p offset
*/
ENTRY(pxa27x_cpu_suspend)
#ifndef CONFIG_IWMMXT
mra r2, r3, acc0
#endif
stmfd sp!, {r2 - r12, lr} @ save registers on stack
mov r2, r0 @ save sleep mode
adr r3, BSYM(pxa27x_finish_suspend)
bl cpu_suspend
b pxa_cpu_resume
pxa27x_finish_suspend:
ENTRY(pxa27x_finish_suspend)
@ Put the processor to sleep
@ (also workaround for sighting 28071)
@ -103,22 +78,14 @@ pxa27x_finish_suspend:
#ifdef CONFIG_PXA25x
/*
* pxa25x_cpu_suspend()
* pxa25x_finish_suspend()
*
* Forces CPU into sleep state.
*
* r0 = value for PWRMODE M field for desired sleep state
* r1 = v:p offset
*/
ENTRY(pxa25x_cpu_suspend)
stmfd sp!, {r2 - r12, lr} @ save registers on stack
mov r2, r0 @ save sleep mode
adr r3, BSYM(pxa25x_finish_suspend)
bl cpu_suspend
b pxa_cpu_resume
pxa25x_finish_suspend:
ENTRY(pxa25x_finish_suspend)
@ prepare value for sleep mode
mov r1, r0 @ sleep mode
@ -202,16 +169,3 @@ pxa_cpu_do_suspend:
mcr p14, 0, r1, c7, c0, 0 @ PWRMODE
20: b 20b @ loop waiting for sleep
/*
* pxa_cpu_resume()
*
* entry point from bootloader into kernel during resume
*/
.align 5
pxa_cpu_resume:
ldmfd sp!, {r2, r3}
#ifndef CONFIG_IWMMXT
mar acc0, r2, r3
#endif
ldmfd sp!, {r4 - r12, pc} @ return to caller

3
arch/arm/mach-pxa/zeus.c
View File

@ -676,7 +676,8 @@ static struct pxa2xx_udc_mach_info zeus_udc_info = {
static void zeus_power_off(void)
{
local_irq_disable();
pxa27x_cpu_suspend(PWRMODE_DEEPSLEEP, PLAT_PHYS_OFFSET - PAGE_OFFSET);
cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, PWRMODE_DEEPSLEEP,
pxa27x_finish_suspend);
}
#else
#define zeus_power_off NULL