From: Thiemo Seufer <ths@networkno.de>
To: Martin Michlmayr <tbm@cyrius.com>
Cc: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: Re: [PATCH] Qemu system shutdown support
Date: Mon, 15 May 2006 18:59:34 +0100 [thread overview]
Message-ID: <20060515175934.GA11370@networkno.de> (raw)
In-Reply-To: <20060515173023.GA13776@deprecation.cyrius.com>
Martin Michlmayr wrote:
> * Thiemo Seufer <ths@networkno.de> [2006-05-15 18:25]:
> > +{
> > + volatile unsigned int *reg = (unsigned int *)QEMU_RESTART_REG;
>
> This should be a tab.
Updated.
Support for qemu system shutdown.
Signed-off-by: Thiemo Seufer <ths@networkno.de>
diff -urpN linux-orig/arch/mips/qemu/Makefile linux-work/arch/mips/qemu/Makefile
--- linux-orig/arch/mips/qemu/Makefile 2006-04-24 12:02:26.000000000 +0100
+++ linux-work/arch/mips/qemu/Makefile 2006-05-15 03:07:31.000000000 +0100
@@ -2,7 +2,7 @@
# 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-$(CONFIG_VT) += q-vga.o
obj-$(CONFIG_SMP) += q-smp.o
diff -urpN linux-orig/arch/mips/qemu/q-reset.c linux-work/arch/mips/qemu/q-reset.c
--- linux-orig/arch/mips/qemu/q-reset.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-work/arch/mips/qemu/q-reset.c 2006-05-15 03:06:44.000000000 +0100
@@ -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 -urpN linux-orig/arch/mips/qemu/q-setup.c linux-work/arch/mips/qemu/q-setup.c
--- linux-orig/arch/mips/qemu/q-setup.c 2006-04-24 12:02:26.000000000 +0100
+++ linux-work/arch/mips/qemu/q-setup.c 2006-05-15 03:06:44.000000000 +0100
@@ -3,6 +3,7 @@
#include <asm/time.h>
extern void qvga_init(void);
+extern void qemu_reboot_setup(void);
#define QEMU_PORT_BASE 0xb4000000
@@ -27,4 +28,6 @@ void __init plat_setup(void)
qvga_init();
#endif
board_timer_setup = qemu_timer_setup;
+
+ qemu_reboot_setup();
}
diff -urpN linux-orig/include/asm-mips/qemu.h linux-work/include/asm-mips/qemu.h
--- linux-orig/include/asm-mips/qemu.h 2006-04-24 12:02:35.000000000 +0100
+++ linux-work/include/asm-mips/qemu.h 2006-05-15 03:06:44.000000000 +0100
@@ -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 */
next prev parent reply other threads:[~2006-05-15 18:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-15 17:25 [PATCH] Qemu system shutdown support Thiemo Seufer
2006-05-15 17:30 ` Martin Michlmayr
2006-05-15 17:59 ` Thiemo Seufer [this message]
2006-05-16 17:50 ` Ralf Baechle
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