arch/mips/qemu/q-reset.c

   1 #include <linux/config.h>
   2
   3 #include <asm/io.h>
   4 #include <asm/reboot.h>
   5 #include <asm/cacheflush.h>
   6 #include <asm/qemu.h>
   7
   8 static void qemu_machine_restart(char *command)
   9 {
  10         volatile unsigned int *reg = (unsigned int *)QEMU_RESTART_REG;
  11
  12         set_c0_status(ST0_BEV | ST0_ERL);
  13         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  14         flush_cache_all();
  15         write_c0_wired(0);
  16         *reg = 42;
  17         while (1)
  18                 cpu_wait();
  19 }
  20
  21 static void qemu_machine_halt(void)
  22 {
  23         volatile unsigned int *reg = (unsigned int *)QEMU_HALT_REG;
  24
  25         *reg = 42;
  26         while (1)
  27                 cpu_wait();
  28 }
  29
  30 void qemu_reboot_setup(void)
  31 {
  32         _machine_restart = qemu_machine_restart;
  33         _machine_halt = qemu_machine_halt;
  34 }