new file mode 100644
@@ -0,0 +1,68 @@
+/*
+ * QEMU debug exit port ("LGPL'ed-VGA-BIOS-style port 501/502") emulation
+ *
+ * Copyright (c) 2012 Herve Poussineau
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "isa.h"
+
+typedef struct ISADebugExitState {
+ ISADevice dev;
+ uint32_t iobase;
+ uint8_t access_size;
+} ISADebugExitState;
+
+static void debugexit_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ exit((val << 1) | 1);
+}
+
+static int debugexit_isa_initfn(ISADevice *dev)
+{
+ ISADebugExitState *isa = DO_UPCAST(ISADebugExitState, dev, dev);
+
+ register_ioport_write(isa->iobase, 1, isa->access_size,
+ debugexit_ioport_write, NULL);
+ return 0;
+}
+
+static Property debugexit_isa_properties[] = {
+ DEFINE_PROP_HEX32("iobase", ISADebugExitState, iobase, 0x501),
+ DEFINE_PROP_UINT8("access-size", ISADebugExitState, access_size, 1),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void debugexit_isa_class_initfn(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
+ ic->init = debugexit_isa_initfn;
+ dc->props = debugexit_isa_properties;
+}
+
+static TypeInfo debugexit_isa_info = {
+ .name = "isa-debugexit",
+ .parent = TYPE_ISA_DEVICE,
+ .instance_size = sizeof(ISADebugExitState),
+ .class_init = debugexit_isa_class_initfn,
+};
+
+static void debugexit_register_types(void)
+{
+ type_register_static(&debugexit_isa_info);
+}
+
+type_init(debugexit_register_types)
@@ -3,7 +3,7 @@ obj-y += apic_common.o apic.o kvmvapic.o
obj-y += sga.o ioapic_common.o ioapic.o piix_pci.o
obj-y += vmport.o
obj-y += pci-hotplug.o smbios.o wdt_ib700.o
-obj-y += debugcon.o multiboot.o
+obj-y += debugcon.o debugexit.o multiboot.o
obj-y += pc_piix.o
obj-y += pc_sysfw.o
obj-$(CONFIG_XEN) += xen_platform.o xen_apic.o