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OMAP3: PM: MPU off-mode support

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Adds a 'save_state' option when calling into SRAM idle function
and adds some minor cleanups of SRAM asm code.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Rajendra Nayak 2008-09-26 17:49:56 +05:30 committed by Kevin Hilman
parent 57f277b012
commit 61255ab9e8
2 changed files with 14 additions and 8 deletions
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11
arch/arm/mach-omap2/pm34xx.c
View File

@ -28,6 +28,7 @@
#include <plat/powerdomain.h>
#include <plat/control.h>
#include <plat/serial.h>
#include <plat/sdrc.h>
#include <asm/tlbflush.h>
@ -223,6 +224,9 @@ static void omap_sram_idle(void)
/* No need to save context */
save_state = 0;
break;
case PWRDM_POWER_OFF:
save_state = 3;
break;
default:
/* Invalid state */
printk(KERN_ERR "Invalid mpu state in sram_idle\n");
@ -248,7 +252,12 @@ static void omap_sram_idle(void)
prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
}
_omap_sram_idle(NULL, save_state);
/*
* omap3_arm_context is the location where ARM registers
* get saved. The restore path then reads from this
* location and restores them back.
*/
_omap_sram_idle(omap3_arm_context, save_state);
cpu_init();
/* Restore table entry modified during MMU restoration */

11
arch/arm/mach-omap2/sleep34xx.S
View File

@ -36,12 +36,11 @@
OMAP3430_PM_PREPWSTST)
#define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \
OMAP3430_PM_PREPWSTST)
#define PM_PWSTCTRL_MPU_P OMAP34XX_PRM_REGADDR(MPU_MOD, PM_PWSTCTRL)
#define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + PM_PWSTCTRL
#define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is
* available */
#define SCRATCHPAD_BASE_P OMAP343X_CTRL_REGADDR(\
OMAP343X_CONTROL_MEM_WKUP +\
SCRATCHPAD_MEM_OFFS)
#define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE + OMAP343X_CONTROL_MEM_WKUP\
+ SCRATCHPAD_MEM_OFFS)
#define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER)
.text
@ -96,7 +95,7 @@ loop:
ldmfd sp!, {r0-r12, pc} @ restore regs and return
restore:
/* b restore*/ @ Enable to debug restore code
/* b restore*/ @ Enable to debug restore code
/* Check what was the reason for mpu reset and store the reason in r9*/
/* 1 - Only L1 and logic lost */
/* 2 - Only L2 lost - In this case, we wont be here */
@ -416,8 +415,6 @@ scratchpad_base:
.word SCRATCHPAD_BASE_P
sdrc_power:
.word SDRC_POWER_V
context_mem:
.word 0x803E3E14
clk_stabilize_delay:
.word 0x000001FF
assoc_mask: