2c8ed55f0f
Rename the unique variable assigned as 'pit' which better
represents what it holds, to fix a warning reported by the
Clang static code analyzer:
CC hw/isa/i82378.o
hw/isa/i82378.c:108:5: warning: Value stored to 'isa' is never read
isa = isa_create_simple(isabus, "i82374");
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reported-by: Clang Static Analyzer
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200422133152.16770-7-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/*
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* QEMU Intel i82378 emulation (PCI to ISA bridge)
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*
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* Copyright (c) 2010-2011 Hervé Poussineau
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/pci/pci.h"
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#include "hw/irq.h"
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#include "hw/intc/i8259.h"
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#include "hw/timer/i8254.h"
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#include "migration/vmstate.h"
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#include "hw/audio/pcspk.h"
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#define TYPE_I82378 "i82378"
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#define I82378(obj) \
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OBJECT_CHECK(I82378State, (obj), TYPE_I82378)
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typedef struct I82378State {
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PCIDevice parent_obj;
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qemu_irq out[2];
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qemu_irq *i8259;
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MemoryRegion io;
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} I82378State;
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static const VMStateDescription vmstate_i82378 = {
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.name = "pci-i82378",
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.version_id = 0,
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.minimum_version_id = 0,
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.fields = (VMStateField[]) {
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VMSTATE_PCI_DEVICE(parent_obj, I82378State),
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VMSTATE_END_OF_LIST()
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},
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};
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static void i82378_request_out0_irq(void *opaque, int irq, int level)
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{
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I82378State *s = opaque;
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qemu_set_irq(s->out[0], level);
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}
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static void i82378_request_pic_irq(void *opaque, int irq, int level)
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{
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DeviceState *dev = opaque;
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I82378State *s = I82378(dev);
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qemu_set_irq(s->i8259[irq], level);
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}
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static void i82378_realize(PCIDevice *pci, Error **errp)
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{
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DeviceState *dev = DEVICE(pci);
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I82378State *s = I82378(dev);
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uint8_t *pci_conf;
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ISABus *isabus;
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ISADevice *pit;
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pci_conf = pci->config;
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pci_set_word(pci_conf + PCI_COMMAND,
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PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
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pci_set_word(pci_conf + PCI_STATUS,
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PCI_STATUS_DEVSEL_MEDIUM);
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pci_config_set_interrupt_pin(pci_conf, 1); /* interrupt pin 0 */
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isabus = isa_bus_new(dev, get_system_memory(),
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pci_address_space_io(pci), errp);
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if (!isabus) {
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return;
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}
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/* This device has:
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2 82C59 (irq)
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1 82C54 (pit)
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2 82C37 (dma)
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NMI
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Utility Bus Support Registers
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All devices accept byte access only, except timer
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*/
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/* 2 82C59 (irq) */
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s->i8259 = i8259_init(isabus,
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qemu_allocate_irq(i82378_request_out0_irq, s, 0));
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isa_bus_irqs(isabus, s->i8259);
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/* 1 82C54 (pit) */
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pit = i8254_pit_init(isabus, 0x40, 0, NULL);
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/* speaker */
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pcspk_init(isabus, pit);
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/* 2 82C37 (dma) */
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isa_create_simple(isabus, "i82374");
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}
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static void i82378_init(Object *obj)
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{
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DeviceState *dev = DEVICE(obj);
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I82378State *s = I82378(obj);
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qdev_init_gpio_out(dev, s->out, 1);
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qdev_init_gpio_in(dev, i82378_request_pic_irq, 16);
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}
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static void i82378_class_init(ObjectClass *klass, void *data)
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{
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PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
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DeviceClass *dc = DEVICE_CLASS(klass);
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k->realize = i82378_realize;
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k->vendor_id = PCI_VENDOR_ID_INTEL;
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k->device_id = PCI_DEVICE_ID_INTEL_82378;
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k->revision = 0x03;
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k->class_id = PCI_CLASS_BRIDGE_ISA;
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dc->vmsd = &vmstate_i82378;
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set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
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}
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static const TypeInfo i82378_type_info = {
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.name = TYPE_I82378,
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.parent = TYPE_PCI_DEVICE,
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.instance_size = sizeof(I82378State),
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.instance_init = i82378_init,
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.class_init = i82378_class_init,
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.interfaces = (InterfaceInfo[]) {
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{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
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{ },
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},
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};
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static void i82378_register_types(void)
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{
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type_register_static(&i82378_type_info);
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}
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type_init(i82378_register_types)
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