From aade20046b7ab5bd9b2afe84ccb31f0adf0c5e1e Mon Sep 17 00:00:00 2001 From: Tang Yuantian Date: Thu, 17 Apr 2014 15:33:46 +0800 Subject: 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 Reviewed-by: York Sun --- arch/powerpc/lib/board.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'arch/powerpc/lib') diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c index f86c6f3..8b03d3a 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)); -- cgit v1.1