diff options
| author | Kumar Gala <galak@freescale.com> | 2005-09-03 15:55:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:05:56 -0700 |
| commit | a2f40ccd294d14e5aca464c1913e8e0d8de35fca (patch) | |
| tree | d900ebdbf37656d77acf7934db40021b21d49fde /arch/ppc/kernel/setup.c | |
| parent | 886b9fa49900b055e20cd98f379fda49835d1ee6 (diff) | |
[PATCH] ppc32: Added support for the Book-E style Watchdog Timer
PowerPC 40x and Book-E processors support a watchdog timer at the processor
core level. The timer has implementation dependent timeout frequencies
that can be configured by software.
One the first Watchdog timeout we get a critical exception. It is left to
board specific code to determine what should happen at this point. If
nothing is done and another timeout period expires the processor may
attempt to reset the machine.
Command line parameters:
wdt=0 : disable watchdog (default)
wdt=1 : enable watchdog
wdt_period=N : N sets the value of the Watchdog Timer Period.
The Watchdog Timer Period meaning is implementation specific. Check
User Manual for the processor for more details.
This patch is based off of work done by Takeharu Kato.
Signed-off-by: Matt McClintock <msm@freescale.com>
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/ppc/kernel/setup.c')
| -rw-r--r-- | arch/ppc/kernel/setup.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c index 929e5d1cc7f..cf74a744e37 100644 --- a/arch/ppc/kernel/setup.c +++ b/arch/ppc/kernel/setup.c @@ -615,6 +615,30 @@ machine_init(unsigned long r3, unsigned long r4, unsigned long r5, if (ppc_md.progress) ppc_md.progress("id mach(): done", 0x200); } +#ifdef CONFIG_BOOKE_WDT +/* Checks wdt=x and wdt_period=xx command-line option */ +int __init early_parse_wdt(char *p) +{ + extern u32 wdt_enable; + + if (p && strncmp(p, "0", 1) != 0) + wdt_enable = 1; + + return 0; +} +early_param("wdt", early_parse_wdt); + +int __init early_parse_wdt_period (char *p) +{ + extern u32 wdt_period; + + if (p) + wdt_period = simple_strtoul(p, NULL, 0); + + return 0; +} +early_param("wdt_period", early_parse_wdt_period); +#endif /* CONFIG_BOOKE_WDT */ /* Checks "l2cr=xxxx" command-line option */ int __init ppc_setup_l2cr(char *str) |