diff options
| author |   Jon Frosdick <jon.frosdick@st.com> | 2009-08-24 16:20:44 +0900 |
|---|---|---|
| committer |   Paul Mundt <lethal@linux-sh.org> | 2009-08-24 16:20:44 +0900 |
| commit | b46373e0d4b9f714ab757aae0c19c41fbcc73ef5 (patch) | |
| tree | 9c2c39193b94dc247b66832267b7e105dd1cda25 /arch/sh | |
| parent | sh: kgdb: do not reload VBR while handling debugger breackpoint (diff) | |
| download | linux-dev-b46373e0d4b9f714ab757aae0c19c41fbcc73ef5.tar.xz linux-dev-b46373e0d4b9f714ab757aae0c19c41fbcc73ef5.zip | |
sh: Use internal watchdog timer to perform reset
This patches will trigger a reboot using the watchdog
timer instead of double fault. Unlike the previous
method, this one actually works in 32 bit mode.
Reset should also be cleaner.
Signed-off-by: Jon Frosdick <jon.frosdick@st.com>
Signed-off-by: Carl Shaw <carl.shaw@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/kernel/process_32.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index 9fee977f176b..0673c4746be3 100644 --- a/arch/sh/kernel/process_32.c +++ b/arch/sh/kernel/process_32.c @@ -32,15 +32,35 @@ #include <asm/ubc.h> #include <asm/fpu.h> #include <asm/syscalls.h> +#include <asm/watchdog.h> int ubc_usercnt = 0; +#ifdef CONFIG_32BIT +static void watchdog_trigger_immediate(void) +{ + sh_wdt_write_cnt(0xFF); + sh_wdt_write_csr(0xC2); +} + +void machine_restart(char * __unused) +{ + local_irq_disable(); + + /* Use watchdog timer to trigger reset */ + watchdog_trigger_immediate(); + + while (1) + cpu_sleep(); +} +#else void machine_restart(char * __unused) { /* SR.BL=1 and invoke address error to let CPU reset (manual reset) */ asm volatile("ldc %0, sr\n\t" "mov.l @%1, %0" : : "r" (0x10000000), "r" (0x80000001)); } +#endif void machine_halt(void) { |