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| author | Tang Yuantian <yuantian.tang@freescale.com> | 2014-04-17 15:33:46 +0800 |
|---|---|---|
| committer | York Sun <yorksun@freescale.com> | 2014-04-22 17:58:49 -0700 |
| commit | aade20046b7ab5bd9b2afe84ccb31f0adf0c5e1e (patch) | |
| tree | 238878efdee4574890334657a984c1c2d564fe91 /arch/powerpc/lib | |
| parent | 5aef4c86f3629b937cee159c3d44c0d0e9762a42 (diff) | |
| download | u-boot-aade20046b7ab5bd9b2afe84ccb31f0adf0c5e1e.tar.gz | |
mpc85xx/t104x: Add deep sleep framework support
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>
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/board.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c index f86c6f3e8f..8b03d3aa07 100644 --- a/arch/powerpc/lib/board.c +++ b/arch/powerpc/lib/board.c @@ -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)); |