/* Architecture-specific restart for Kaen and other boards, where a GPIO line
* is used to reset CPU and TPM together.
*
* Most of this function mimicks arm_machine_restart in process.c, except that
* that function turns off caching and then flushes the cache one more time,
* and we do not. This is certainly less clean but unlikely to matter as the
* additional dirty cache lines do not contain critical data.
*
* On boards that don't implement the reset hardware we fall back to the old
* method.
*/
static void gpio_machine_restart(char mode, const char *cmd)
{
tegra_pm_flush_console();
/* Disable interrupts first */
local_irq_disable();
local_fiq_disable();
/* We must flush the L2 cache for preserved / kcrashmem */
outer_flush_all();
/* Clean and invalidate caches */
flush_cache_all();
/* Reboot by resetting CPU and TPM via GPIO */
gpio_set_value(TEGRA_GPIO_RESET, 0);
/*
* printk should still work with interrupts disabled, but since we've
* already flushed this isn't guaranteed to actually make it out. We'll
* print it anyway just in case.
*/
printk(KERN_INFO "restart: trying legacy reboot\n");
legacy_arm_pm_restart(mode, cmd);
}
static void tegra_pm_restart(char mode, const char *cmd)
{
tegra_pm_flush_console();
arm_machine_restart(mode, cmd);
}
