diff options
Diffstat (limited to 'arch/arm/mach-omap2/control.c')
| -rw-r--r-- | arch/arm/mach-omap2/control.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c index 0269bb055b69..d058f7c3ec6a 100644 --- a/arch/arm/mach-omap2/control.c +++ b/arch/arm/mach-omap2/control.c @@ -209,6 +209,37 @@ void omap4_ctrl_pad_writel(u32 val, u16 offset) __raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset)); } +#ifdef CONFIG_ARCH_OMAP3 + +/** + * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot + * @bootmode: 8-bit value to pass to some boot code + * + * Set the bootmode in the scratchpad RAM. This is used after the + * system restarts. Not sure what actually uses this - it may be the + * bootloader, rather than the boot ROM - contrary to the preserved + * comment below. No return value. + */ +void omap3_ctrl_write_boot_mode(u8 bootmode) +{ + u32 l; + + l = ('B' << 24) | ('M' << 16) | bootmode; + + /* + * 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. + * + * XXX This should use some omap_ctrl_writel()-type function + */ + __raw_writel(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4)); +} + +#endif + #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) /* * Clears the scratchpad contents in case of cold boot- |