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mpc85xx/t104x: Add deep sleep framework support

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When T104x soc wakes up from deep sleep, control is passed to the
primary core that starts executing uboot. After re-initialized some
IP blocks, like DDRC, kernel will take responsibility to continue
to restore environment it leaves before.

Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Tang Yuantian
2014-04-17 15:33:46 +08:00
committed by York Sun
parent 5aef4c86f3
commit aade20046b
5 changed files with 80 additions and 4 deletions
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16
arch/powerpc/lib/board.c
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@@ -343,6 +343,13 @@ void board_init_f(ulong bootflag)
#ifdef CONFIG_PRAM
ulong reg;
#endif
#ifdef CONFIG_DEEP_SLEEP
const ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
struct ccsr_scfg *scfg = (void *)CONFIG_SYS_MPC85xx_SCFG;
u32 start_addr;
typedef void (*func_t)(void);
func_t kernel_resume;
#endif
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
@@ -360,6 +367,15 @@ void board_init_f(ulong bootflag)
if ((*init_fnc_ptr) () != 0)
hang();
#ifdef CONFIG_DEEP_SLEEP
/* Jump to kernel in deep sleep case */
if (in_be32(&gur->scrtsr[0]) & (1 << 3)) {
start_addr = in_be32(&scfg->sparecr[1]);
kernel_resume = (func_t)start_addr;
kernel_resume();
}
#endif
#ifdef CONFIG_POST
post_bootmode_init();
post_run(NULL, POST_ROM | post_bootmode_get(NULL));