reset.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:2k
- /*
- * 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/io.h>
- #include <asm/pgtable.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_cp0_status(ST0_BEV | ST0_ERL);
- change_cp0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
- flush_cache_all();
- write_32bit_cp0_register(CP0_WIRED, 0);
- __asm__ __volatile__(
- "jrt%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();
- }