hw/isa/piix4.c - third_party/qemu - Git at Google

 /*
  * QEMU PIIX4 PCI Bridge Emulation
  *
  * Copyright (c) 2006 Fabrice Bellard
  * Copyright (c) 2018 Hervé Poussineau
  *
  * 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 "qapi/error.h"
 #include "hw/irq.h"
 #include "hw/southbridge/piix.h"
 #include "hw/pci/pci.h"
 #include "hw/isa/isa.h"
 #include "hw/sysbus.h"
 #include "hw/intc/i8259.h"
 #include "hw/dma/i8257.h"
 #include "hw/timer/i8254.h"
 #include "hw/rtc/mc146818rtc.h"
 #include "hw/ide/pci.h"
 #include "migration/vmstate.h"
 #include "sysemu/reset.h"
 #include "sysemu/runstate.h"

 PCIDevice *piix4_dev;

 typedef struct PIIX4State {
     PCIDevice dev;
     qemu_irq cpu_intr;
     qemu_irq *isa;

     RTCState rtc;
     /* Reset Control Register */
     MemoryRegion rcr_mem;
     uint8_t rcr;
 } PIIX4State;

 #define PIIX4_PCI_DEVICE(obj) \
     OBJECT_CHECK(PIIX4State, (obj), TYPE_PIIX4_PCI_DEVICE)

 static void piix4_isa_reset(DeviceState *dev)
 {
     PIIX4State *d = PIIX4_PCI_DEVICE(dev);
     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_request_i8259_irq(void *opaque, int irq, int level)
 {
     PIIX4State *s = opaque;
     qemu_set_irq(s->cpu_intr, level);
 }

 static void piix4_set_i8259_irq(void *opaque, int irq, int level)
 {
     PIIX4State *s = opaque;
     qemu_set_irq(s->isa[irq], level);
 }

 static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val,
                             unsigned int len)
 {
     PIIX4State *s = opaque;

     if (val & 4) {
         qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
         return;
     }

     s->rcr = val & 2; /* keep System Reset type only */
 }

 static uint64_t piix4_rcr_read(void *opaque, hwaddr addr, unsigned int len)
 {
     PIIX4State *s = opaque;

     return s->rcr;
 }

 static const MemoryRegionOps piix4_rcr_ops = {
     .read = piix4_rcr_read,
     .write = piix4_rcr_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void piix4_realize(PCIDevice *dev, Error **errp)
 {
     PIIX4State *s = PIIX4_PCI_DEVICE(dev);
     ISABus *isa_bus;
     qemu_irq *i8259_out_irq;
     Error *err = NULL;

     isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev),
                           pci_address_space_io(dev), errp);
     if (!isa_bus) {
         return;
     }

     qdev_init_gpio_in_named(DEVICE(dev), piix4_set_i8259_irq,
                             "isa", ISA_NUM_IRQS);
     qdev_init_gpio_out_named(DEVICE(dev), &s->cpu_intr,
                              "intr", 1);

     memory_region_init_io(&s->rcr_mem, OBJECT(dev), &piix4_rcr_ops, s,
                           "reset-control", 1);
     memory_region_add_subregion_overlap(pci_address_space_io(dev),
                                         PIIX_RCR_IOPORT, &s->rcr_mem, 1);

     /* initialize i8259 pic */
     i8259_out_irq = qemu_allocate_irqs(piix4_request_i8259_irq, s, 1);
     s->isa = i8259_init(isa_bus, *i8259_out_irq);

     /* initialize ISA irqs */
     isa_bus_irqs(isa_bus, s->isa);

     /* initialize pit */
     i8254_pit_init(isa_bus, 0x40, 0, NULL);

     /* DMA */
     i8257_dma_init(isa_bus, 0);

     /* RTC */
     qdev_set_parent_bus(DEVICE(&s->rtc), BUS(isa_bus));
     qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000);
     object_property_set_bool(OBJECT(&s->rtc), true, "realized", &err);
     if (err) {
         error_propagate(errp, err);
         return;
     }
     isa_init_irq(ISA_DEVICE(&s->rtc), &s->rtc.irq, RTC_ISA_IRQ);

     piix4_dev = dev;
 }

 static void piix4_init(Object *obj)
 {
     PIIX4State *s = PIIX4_PCI_DEVICE(obj);

     object_initialize(&s->rtc, sizeof(s->rtc), TYPE_MC146818_RTC);
 }

 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->reset = piix4_isa_reset;
     dc->desc = "ISA bridge";
     dc->vmsd = &vmstate_piix4;
     /*
      * Reason: part of PIIX4 southbridge, needs to be wired up,
      * e.g. by mips_malta_init()
      */
     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),
     .instance_init = piix4_init,
     .class_init    = piix4_class_init,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static void piix4_register_types(void)
 {
     type_register_static(&piix4_info);
 }

 type_init(piix4_register_types)

 DeviceState *piix4_create(PCIBus *pci_bus, ISABus **isa_bus, I2CBus **smbus)
 {
     PCIDevice *pci;
     DeviceState *dev;
     int devfn = PCI_DEVFN(10, 0);

     pci = pci_create_simple_multifunction(pci_bus, devfn,  true,
                                           TYPE_PIIX4_PCI_DEVICE);
     dev = DEVICE(pci);
     if (isa_bus) {
         *isa_bus = ISA_BUS(qdev_get_child_bus(dev, "isa.0"));
     }

     pci = pci_create_simple(pci_bus, devfn + 1, "piix4-ide");
     pci_ide_create_devs(pci);

     pci_create_simple(pci_bus, devfn + 2, "piix4-usb-uhci");
     if (smbus) {
         *smbus = piix4_pm_init(pci_bus, devfn + 3, 0x1100,
                                isa_get_irq(NULL, 9), NULL, 0, NULL);
    }

     return dev;
 }
	/*
	* QEMU PIIX4 PCI Bridge Emulation
	*
	* Copyright (c) 2006 Fabrice Bellard
	* Copyright (c) 2018 Hervé Poussineau
	*
	* 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 "qapi/error.h"
	#include "hw/irq.h"
	#include "hw/southbridge/piix.h"
	#include "hw/pci/pci.h"
	#include "hw/isa/isa.h"
	#include "hw/sysbus.h"
	#include "hw/intc/i8259.h"
	#include "hw/dma/i8257.h"
	#include "hw/timer/i8254.h"
	#include "hw/rtc/mc146818rtc.h"
	#include "hw/ide/pci.h"
	#include "migration/vmstate.h"
	#include "sysemu/reset.h"
	#include "sysemu/runstate.h"

	PCIDevice *piix4_dev;

	typedef struct PIIX4State {
	PCIDevice dev;
	qemu_irq cpu_intr;
	qemu_irq *isa;

	RTCState rtc;
	/* Reset Control Register */
	MemoryRegion rcr_mem;
	uint8_t rcr;
	} PIIX4State;

	#define PIIX4_PCI_DEVICE(obj) \
	OBJECT_CHECK(PIIX4State, (obj), TYPE_PIIX4_PCI_DEVICE)

	static void piix4_isa_reset(DeviceState *dev)
	{
	PIIX4State *d = PIIX4_PCI_DEVICE(dev);
	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_request_i8259_irq(void *opaque, int irq, int level)
	{
	PIIX4State *s = opaque;
	qemu_set_irq(s->cpu_intr, level);
	}

	static void piix4_set_i8259_irq(void *opaque, int irq, int level)
	{
	PIIX4State *s = opaque;
	qemu_set_irq(s->isa[irq], level);
	}

	static void piix4_rcr_write(void *opaque, hwaddr addr, uint64_t val,
	unsigned int len)
	{
	PIIX4State *s = opaque;

	if (val & 4) {
	qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
	return;
	}

	s->rcr = val & 2; /* keep System Reset type only */
	}

	static uint64_t piix4_rcr_read(void *opaque, hwaddr addr, unsigned int len)
	{
	PIIX4State *s = opaque;

	return s->rcr;
	}

	static const MemoryRegionOps piix4_rcr_ops = {
	.read = piix4_rcr_read,
	.write = piix4_rcr_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.impl = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void piix4_realize(PCIDevice dev, Error *errp)
	{
	PIIX4State *s = PIIX4_PCI_DEVICE(dev);
	ISABus *isa_bus;
	qemu_irq *i8259_out_irq;
	Error *err = NULL;

	isa_bus = isa_bus_new(DEVICE(dev), pci_address_space(dev),
	pci_address_space_io(dev), errp);
	if (!isa_bus) {
	return;
	}

	qdev_init_gpio_in_named(DEVICE(dev), piix4_set_i8259_irq,
	"isa", ISA_NUM_IRQS);
	qdev_init_gpio_out_named(DEVICE(dev), &s->cpu_intr,
	"intr", 1);

	memory_region_init_io(&s->rcr_mem, OBJECT(dev), &piix4_rcr_ops, s,
	"reset-control", 1);
	memory_region_add_subregion_overlap(pci_address_space_io(dev),
	PIIX_RCR_IOPORT, &s->rcr_mem, 1);

	/* initialize i8259 pic */
	i8259_out_irq = qemu_allocate_irqs(piix4_request_i8259_irq, s, 1);
	s->isa = i8259_init(isa_bus, *i8259_out_irq);

	/* initialize ISA irqs */
	isa_bus_irqs(isa_bus, s->isa);

	/* initialize pit */
	i8254_pit_init(isa_bus, 0x40, 0, NULL);

	/* DMA */
	i8257_dma_init(isa_bus, 0);

	/* RTC */
	qdev_set_parent_bus(DEVICE(&s->rtc), BUS(isa_bus));
	qdev_prop_set_int32(DEVICE(&s->rtc), "base_year", 2000);
	object_property_set_bool(OBJECT(&s->rtc), true, "realized", &err);
	if (err) {
	error_propagate(errp, err);
	return;
	}
	isa_init_irq(ISA_DEVICE(&s->rtc), &s->rtc.irq, RTC_ISA_IRQ);

	piix4_dev = dev;
	}

	static void piix4_init(Object *obj)
	{
	PIIX4State *s = PIIX4_PCI_DEVICE(obj);

	object_initialize(&s->rtc, sizeof(s->rtc), TYPE_MC146818_RTC);
	}

	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->reset = piix4_isa_reset;
	dc->desc = "ISA bridge";
	dc->vmsd = &vmstate_piix4;
	/*
	* Reason: part of PIIX4 southbridge, needs to be wired up,
	* e.g. by mips_malta_init()
	*/
	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),
	.instance_init = piix4_init,
	.class_init = piix4_class_init,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static void piix4_register_types(void)
	{
	type_register_static(&piix4_info);
	}

	type_init(piix4_register_types)

	DeviceState piix4_create(PCIBus pci_bus, ISABus isa_bus, I2CBus smbus)
	{
	PCIDevice *pci;
	DeviceState *dev;
	int devfn = PCI_DEVFN(10, 0);

	pci = pci_create_simple_multifunction(pci_bus, devfn, true,
	TYPE_PIIX4_PCI_DEVICE);
	dev = DEVICE(pci);
	if (isa_bus) {
	*isa_bus = ISA_BUS(qdev_get_child_bus(dev, "isa.0"));
	}

	pci = pci_create_simple(pci_bus, devfn + 1, "piix4-ide");
	pci_ide_create_devs(pci);

	pci_create_simple(pci_bus, devfn + 2, "piix4-usb-uhci");
	if (smbus) {
	*smbus = piix4_pm_init(pci_bus, devfn + 3, 0x1100,
	isa_get_irq(NULL, 9), NULL, 0, NULL);
	}

	return dev;
	}