diff options
| author | Juha Yrjola <juha.yrjola@solidboot.com> | 2009-03-10 00:21:01 +0300 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-11-12 01:42:26 +0300 |
| commit | 692ec4abb96174c0e4b3aef6d2b71f36a4a14c8b (patch) | |
| tree | f275fefea1182e46d8a8de9c3288149c6557ca01 /arch/arm/mach-omap2/prcm.c | |
| parent | bf07c9f2d869077cc918b4cda861eadac6df6283 (diff) | |
| download | linux-692ec4abb96174c0e4b3aef6d2b71f36a4a14c8b.tar.xz | |
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 <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/prcm.c')
| -rw-r--r-- | arch/arm/mach-omap2/prcm.c | 13 |
1 files changed, 11 insertions, 2 deletions
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); |