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sh: Rework SuperH Mobile sleep mode code

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Rework the SuperH Mobile sleep code from including
board specific code to allowing each board to provide
pre/post code snippets. These snippets should contain
sdram management code to enter and leave self-refresh.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm
2009-10-30 04:24:07 +00:00
committed by Paul Mundt
parent eb0cd9e88c
commit 323ef8dba6
4 changed files with 170 additions and 163 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
arch/sh/kernel/cpu/shmobile/pm.c
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@ -42,13 +42,14 @@ ATOMIC_NOTIFIER_HEAD(sh_mobile_post_sleep_notifier_list);
#define ILRAM_BASE 0xe5200000
extern const unsigned char sh_mobile_standby[];
extern const unsigned int sh_mobile_standby_size;
void sh_mobile_call_standby(unsigned long mode)
{
void *onchip_mem = (void *)ILRAM_BASE;
void (*standby_onchip_mem)(unsigned long, unsigned long) = onchip_mem;
struct sh_sleep_data *sdp = onchip_mem;
void (*standby_onchip_mem)(unsigned long, unsigned long);
/* code located directly after data structure */
standby_onchip_mem = (void *)(sdp + 1);
atomic_notifier_call_chain(&sh_mobile_pre_sleep_notifier_list,
mode, NULL);
@ -60,10 +61,48 @@ void sh_mobile_call_standby(unsigned long mode)
mode, NULL);
}
extern char sh_mobile_sleep_enter_start;
extern char sh_mobile_sleep_enter_end;
extern char sh_mobile_sleep_resume_start;
extern char sh_mobile_sleep_resume_end;
void sh_mobile_register_self_refresh(unsigned long flags,
void *pre_start, void *pre_end,
void *post_start, void *post_end)
{
void *onchip_mem = (void *)ILRAM_BASE;
void *vp;
struct sh_sleep_data *sdp;
int n;
/* part 0: data area */
sdp = onchip_mem;
sdp->addr.stbcr = 0xa4150020; /* STBCR */
vp = sdp + 1;
/* part 1: common code to enter sleep mode */
n = &sh_mobile_sleep_enter_end - &sh_mobile_sleep_enter_start;
memcpy(vp, &sh_mobile_sleep_enter_start, n);
vp += roundup(n, 4);
/* part 2: board specific code to enter self-refresh mode */
n = pre_end - pre_start;
memcpy(vp, pre_start, n);
sdp->sf_pre = (unsigned long)vp;
vp += roundup(n, 4);
/* part 3: board specific code to resume from self-refresh mode */
n = post_end - post_start;
memcpy(vp, post_start, n);
sdp->sf_post = (unsigned long)vp;
vp += roundup(n, 4);
/* part 4: common code to resume from sleep mode */
WARN_ON(vp > (onchip_mem + 0x600));
vp = onchip_mem + 0x600; /* located at interrupt vector */
n = &sh_mobile_sleep_resume_end - &sh_mobile_sleep_resume_start;
memcpy(vp, &sh_mobile_sleep_resume_start, n);
}
static int sh_pm_enter(suspend_state_t state)
@ -83,13 +122,6 @@ static struct platform_suspend_ops sh_pm_ops = {
static int __init sh_pm_init(void)
{
void *onchip_mem = (void *)ILRAM_BASE;
/* Copy the assembly snippet to the otherwise ununsed ILRAM */
memcpy(onchip_mem, sh_mobile_standby, sh_mobile_standby_size);
wmb();
ctrl_barrier();
suspend_set_ops(&sh_pm_ops);
sh_mobile_setup_cpuidle();
return 0;