Am 06.07.2012 23:53, schrieb Hervé Poussineau:
> Add generic support for simple I/O port which, when written to, cause
> QEMU to exit with the given written value.
>
> There is no vmstate associated with the debugging port, simply because
> the entire interface is a single, stateless, write-only port.
>
> Signed-off-by: Hervé Poussineau <hpous...@reactos.org>
> ---
> hw/debugexit.c | 68
> +++++++++++++++++++++++++++++++++++++++++++++++++
> hw/i386/Makefile.objs | 2 +-
> 2 files changed, 69 insertions(+), 1 deletion(-)
> create mode 100644 hw/debugexit.c
>
> diff --git a/hw/debugexit.c b/hw/debugexit.c
> new file mode 100644
> index 0000000..72ddf31
> --- /dev/null
> +++ b/hw/debugexit.c
> @@ -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);
I understand you're just moving code from patch 2/2 here, but in another
thread it was stated that exit()ing from such writes can do bad things
to the block layer (cleanups not happening) and should be replaced by
qemu_request_shutdown() or something like that...
Andreas
> +}
> +
> +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)
> diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
> index eb171b7..23be2d3 100644
> --- a/hw/i386/Makefile.objs
> +++ b/hw/i386/Makefile.objs
> @@ -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
>
--
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