From 692ec4abb96174c0e4b3aef6d2b71f36a4a14c8b Mon Sep 17 00:00:00 2001 From: Juha Yrjola Date: Mon, 9 Mar 2009 21:21:01 +0000 Subject: OMAP: Store reboot mode in scratchpad on OMAP34xx The reboot mode can be communicated to a bootloader (or the kernel itself) with a scratchpad register. This functionality is especially useful, if userspace is allowed to change the reboot mode. Signed-off-by: Juha Yrjola Signed-off-by: Tony Lindgren Signed-off-by: Kevin Hilman --- arch/arm/mach-omap2/prcm.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c index 221eed11b73f..029d376198d4 100644 --- a/arch/arm/mach-omap2/prcm.c +++ b/arch/arm/mach-omap2/prcm.c @@ -135,9 +135,18 @@ void omap_prcm_arch_reset(char mode) if (cpu_is_omap24xx()) prcm_offs = WKUP_MOD; - else if (cpu_is_omap34xx()) + else if (cpu_is_omap34xx()) { + u32 l; + prcm_offs = OMAP3430_GR_MOD; - else + l = ('B' << 24) | ('M' << 16) | mode; + /* Reserve the first word in scratchpad for communicating + * with the boot ROM. A pointer to a data structure + * describing the boot process can be stored there, + * cf. OMAP34xx TRM, Initialization / Software Booting + * Configuration. */ + omap_writel(l, OMAP343X_SCRATCHPAD + 4); + } else WARN_ON(1); prm_set_mod_reg_bits(OMAP_RST_DPLL3, prcm_offs, RM_RSTCTRL); -- cgit v1.2.3