diff options
Diffstat (limited to 'arch/mips/cobalt/reset.c')
| -rw-r--r-- | arch/mips/cobalt/reset.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/mips/cobalt/reset.c b/arch/mips/cobalt/reset.c new file mode 100644 index 00000000000..084c8e59f42 --- /dev/null +++ b/arch/mips/cobalt/reset.c @@ -0,0 +1,68 @@ +/* + * Cobalt Reset operations + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1995, 1996, 1997 by Ralf Baechle + * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv) + */ +#include <linux/sched.h> +#include <linux/mm.h> +#include <asm/cacheflush.h> +#include <asm/io.h> +#include <asm/processor.h> +#include <asm/reboot.h> +#include <asm/system.h> +#include <asm/mipsregs.h> + +void cobalt_machine_restart(char *command) +{ + *(volatile char *)0xbc000000 = 0x0f; + + /* + * Ouch, we're still alive ... This time we take the silver bullet ... + * ... and find that we leave the hardware in a state in which the + * kernel in the flush locks up somewhen during of after the PCI + * detection stuff. + */ + set_c0_status(ST0_BEV | ST0_ERL); + change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED); + flush_cache_all(); + write_c0_wired(0); + __asm__ __volatile__( + "jr\t%0" + : + : "r" (0xbfc00000)); +} + +extern int led_state; +#define kLED 0xBC000000 +#define LEDSet(x) (*(volatile unsigned char *) kLED) = (( unsigned char)x) + +void cobalt_machine_halt(void) +{ + int mark; + + /* Blink our cute? little LED (number 3)... */ + while (1) { + led_state = led_state | ( 1 << 3 ); + LEDSet(led_state); + mark = jiffies; + while (jiffies<(mark+HZ)); + led_state = led_state & ~( 1 << 3 ); + LEDSet(led_state); + mark = jiffies; + while (jiffies<(mark+HZ)); + } +} + +/* + * This triggers the luser mode device driver for the power switch ;-) + */ +void cobalt_machine_power_off(void) +{ + printk("You can switch the machine off now.\n"); + cobalt_machine_halt(); +} |