diff options
| author | Thiemo Seufer <ths@networkno.de> | 2006-05-15 18:59:34 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2006-06-19 17:39:19 +0100 |
| commit | c583122c26ad04bb2379933dc5acc8b9479d6c67 (patch) | |
| tree | 8afc9153e18b300ab93ff6a675e0c0f6e464c518 | |
| parent | eae89076e696f51762d81d6e2538c3beb59fa7bd (diff) | |
[MIPS] Qemu system shutdown support
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/qemu/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/qemu/q-reset.c | 34 | ||||
| -rw-r--r-- | arch/mips/qemu/q-setup.c | 4 | ||||
| -rw-r--r-- | include/asm-mips/qemu.h | 6 |
4 files changed, 45 insertions, 1 deletions
diff --git a/arch/mips/qemu/Makefile b/arch/mips/qemu/Makefile index 730f459f3e9..078cd3029c9 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 00000000000..c04ebcfc784 --- /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 022eb1af6db..f27155bc2d9 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 @@ void __init plat_setup(void) { set_io_port_base(QEMU_PORT_BASE); board_timer_setup = qemu_timer_setup; + + qemu_reboot_setup(); } diff --git a/include/asm-mips/qemu.h b/include/asm-mips/qemu.h index 905c3958590..531caf44560 100644 --- a/include/asm-mips/qemu.h +++ b/include/asm-mips/qemu.h @@ -21,4 +21,10 @@ */ #define QEMU_C0_COUNTER_CLOCK 100000000 +/* + * Magic qemu system control location. + */ +#define QEMU_RESTART_REG 0xBFBF0000 +#define QEMU_HALT_REG 0xBFBF0004 + #endif /* __ASM_QEMU_H */ |