Commit c583122c authored by Thiemo Seufer's avatar Thiemo Seufer Committed by Ralf Baechle
Browse files

[MIPS] Qemu system shutdown support 



Signed-off-by: default avatarThiemo Seufer <ths@networkno.de>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent eae89076

arch/mips/qemu/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/mips/qemu/q-reset.c

0 → 100644
+34 −0
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#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;

}

arch/mips/qemu/q-setup.c

+4 −0
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@@ -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();

}

include/asm-mips/qemu.h

+6 −0
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@@ -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 */