qemu-e2k/hw/isa/piix4.c

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/*
* QEMU PIIX4 PCI Bridge Emulation
*
* Copyright (c) 2006 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/i386/pc.h"
#include "hw/pci/pci.h"
#include "hw/isa/isa.h"
#include "hw/sysbus.h"
PCIDevice *piix4_dev;
typedef struct PIIX4State {
PCIDevice dev;
} PIIX4State;
#define TYPE_PIIX4_PCI_DEVICE "PIIX4"
#define PIIX4_PCI_DEVICE(obj) \
OBJECT_CHECK(PIIX4State, (obj), TYPE_PIIX4_PCI_DEVICE)
static void piix4_reset(void *opaque)
{
PIIX4State *d = opaque;
uint8_t *pci_conf = d->dev.config;
pci_conf[0x04] = 0x07; // master, memory and I/O
pci_conf[0x05] = 0x00;
pci_conf[0x06] = 0x00;
pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
pci_conf[0x4c] = 0x4d;
pci_conf[0x4e] = 0x03;
pci_conf[0x4f] = 0x00;
pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
pci_conf[0x69] = 0x02;
pci_conf[0x70] = 0x80;
pci_conf[0x76] = 0x0c;
pci_conf[0x77] = 0x0c;
pci_conf[0x78] = 0x02;
pci_conf[0x79] = 0x00;
pci_conf[0x80] = 0x00;
pci_conf[0x82] = 0x00;
pci_conf[0xa0] = 0x08;
pci_conf[0xa2] = 0x00;
pci_conf[0xa3] = 0x00;
pci_conf[0xa4] = 0x00;
pci_conf[0xa5] = 0x00;
pci_conf[0xa6] = 0x00;
pci_conf[0xa7] = 0x00;
pci_conf[0xa8] = 0x0f;
pci_conf[0xaa] = 0x00;
pci_conf[0xab] = 0x00;
pci_conf[0xac] = 0x00;
pci_conf[0xae] = 0x00;
}
static const VMStateDescription vmstate_piix4 = {
.name = "PIIX4",
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, PIIX4State),
VMSTATE_END_OF_LIST()
}
};
static void piix4_realize(PCIDevice *dev, Error **errp)
{
PIIX4State *d = PIIX4_PCI_DEVICE(dev);
isa: Clean up error handling around isa_bus_new() We can have at most one ISA bus. If you try to create another one, isa_bus_new() complains to stderr and returns null. isa_bus_new() is called in two contexts, machine's init() and device's realize() methods. Since complaining to stderr is not proper in the latter context, convert isa_bus_new() to Error. Machine's init(): * mips_jazz_init(), called from the init() methods of machines "magnum" and "pica" * mips_r4k_init(), the init() method of machine "mips" * pc_init1() called from the init() methods of non-q35 PC machines * typhoon_init(), called from clipper_init(), the init() method of machine "clipper" These callers always create the first ISA bus, hence isa_bus_new() can't fail. Simply pass &error_abort. Device's realize(): * i82378_realize(), of PCI device "i82378" * ich9_lpc_realize(), of PCI device "ICH9-LPC" * pci_ebus_realize(), of PCI device "ebus" * piix3_realize(), of PCI device "pci-piix3", abstract parent of "PIIX3" and "PIIX3-xen" * piix4_realize(), of PCI device "PIIX4" * vt82c686b_realize(), of PCI device "VT82C686B" Propagate the error. Note that these devices are typically created only by machine init() methods with qdev_init_nofail() or similar. If we screwed up and created an ISA bus before that call, we now give up right away. Before, we'd hobble on, and typically die in isa_bus_irqs(). Similar if someone finds a way to hot-plug one of these critters. Cc: Richard Henderson <rth@twiddle.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: "Hervé Poussineau" <hpoussin@reactos.org> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Markus Armbruster <armbru@pond.sub.org> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Hervé Poussineau <hpoussin@reactos.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <1450370121-5768-11-git-send-email-armbru@redhat.com>
2015-12-17 17:35:18 +01:00
if (!isa_bus_new(DEVICE(d), pci_address_space(dev),
pci_address_space_io(dev), errp)) {
return;
}
piix4_dev = &d->dev;
qemu_register_reset(piix4_reset, d);
}
int piix4_init(PCIBus *bus, ISABus **isa_bus, int devfn)
{
PCIDevice *d;
d = pci_create_simple_multifunction(bus, devfn, true, "PIIX4");
*isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(d), "isa.0"));
return d->devfn;
}
static void piix4_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = piix4_realize;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0;
k->class_id = PCI_CLASS_BRIDGE_ISA;
dc->desc = "ISA bridge";
dc->vmsd = &vmstate_piix4;
/*
* Reason: part of PIIX4 southbridge, needs to be wired up,
* e.g. by mips_malta_init()
*/
qdev: Replace cannot_instantiate_with_device_add_yet with !user_creatable cannot_instantiate_with_device_add_yet was introduced by commit efec3dd631d94160288392721a5f9c39e50fb2bc to replace no_user. It was supposed to be a temporary measure. When it was introduced, we had 54 cannot_instantiate_with_device_add_yet=true lines in the code. Today (3 years later) this number has not shrunk: we now have 57 cannot_instantiate_with_device_add_yet=true lines. I think it is safe to say it is not a temporary measure, and we won't see the flag go away soon. Instead of a long field name that misleads people to believe it is temporary, replace it a shorter and less misleading field: user_creatable. Except for code comments, changes were generated using the following Coccinelle patch: @@ expression DC; @@ ( -DC->cannot_instantiate_with_device_add_yet = false; +DC->user_creatable = true; | -DC->cannot_instantiate_with_device_add_yet = true; +DC->user_creatable = false; ) @@ typedef ObjectClass; expression dc; identifier class, data; @@ static void device_class_init(ObjectClass *class, void *data) { ... dc->hotpluggable = true; +dc->user_creatable = true; ... } @@ @@ struct DeviceClass { ... -bool cannot_instantiate_with_device_add_yet; +bool user_creatable; ... } @@ expression DC; @@ ( -!DC->cannot_instantiate_with_device_add_yet +DC->user_creatable | -DC->cannot_instantiate_with_device_add_yet +!DC->user_creatable ) Cc: Alistair Francis <alistair.francis@xilinx.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Marcel Apfelbaum <marcel@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Thomas Huth <thuth@redhat.com> Acked-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Acked-by: Marcel Apfelbaum <marcel@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20170503203604.31462-2-ehabkost@redhat.com> [ehabkost: kept "TODO remove once we're there" comment] Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-05-03 22:35:44 +02:00
dc->user_creatable = false;
dc->hotpluggable = false;
}
static const TypeInfo piix4_info = {
.name = TYPE_PIIX4_PCI_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PIIX4State),
.class_init = piix4_class_init,
};
static void piix4_register_types(void)
{
type_register_static(&piix4_info);
}
type_init(piix4_register_types)