[MIPS] Qemu system shutdown support
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/qemu/Makefile b/arch/mips/qemu/Makefile
index 730f459..078cd30 100644
--- a/arch/mips/qemu/Makefile
+++ b/arch/mips/qemu/Makefile
@@ -2,6 +2,6 @@
# Makefile for Qemu specific kernel interface routines under Linux.
#
-obj-y = q-firmware.o q-irq.o q-mem.o q-setup.o
+obj-y = q-firmware.o q-irq.o q-mem.o q-setup.o q-reset.o
obj-$(CONFIG_SMP) += q-smp.o
diff --git a/arch/mips/qemu/q-reset.c b/arch/mips/qemu/q-reset.c
new file mode 100644
index 0000000..c04ebcf
--- /dev/null
+++ b/arch/mips/qemu/q-reset.c
@@ -0,0 +1,34 @@
+#include <linux/config.h>
+
+#include <asm/io.h>
+#include <asm/reboot.h>
+#include <asm/cacheflush.h>
+#include <asm/qemu.h>
+
+static void qemu_machine_restart(char *command)
+{
+ volatile unsigned int *reg = (unsigned int *)QEMU_RESTART_REG;
+
+ set_c0_status(ST0_BEV | ST0_ERL);
+ change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
+ flush_cache_all();
+ write_c0_wired(0);
+ *reg = 42;
+ while (1)
+ cpu_wait();
+}
+
+static void qemu_machine_halt(void)
+{
+ volatile unsigned int *reg = (unsigned int *)QEMU_HALT_REG;
+
+ *reg = 42;
+ while (1)
+ cpu_wait();
+}
+
+void qemu_reboot_setup(void)
+{
+ _machine_restart = qemu_machine_restart;
+ _machine_halt = qemu_machine_halt;
+}
diff --git a/arch/mips/qemu/q-setup.c b/arch/mips/qemu/q-setup.c
index 022eb1a..f27155b 100644
--- a/arch/mips/qemu/q-setup.c
+++ b/arch/mips/qemu/q-setup.c
@@ -2,6 +2,8 @@
#include <asm/io.h>
#include <asm/time.h>
+extern void qemu_reboot_setup(void);
+
#define QEMU_PORT_BASE 0xb4000000
const char *get_system_type(void)
@@ -22,4 +24,6 @@
{
set_io_port_base(QEMU_PORT_BASE);
board_timer_setup = qemu_timer_setup;
+
+ qemu_reboot_setup();
}