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OMAP: Store reboot mode in scratchpad on OMAP34xx

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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 <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Juha Yrjola 2009-03-09 21:21:01 +00:00 committed by Kevin Hilman
parent bf07c9f2d8
commit 692ec4abb9
1 changed files with 11 additions and 2 deletions
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13
arch/arm/mach-omap2/prcm.c
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@ -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);