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Annotation of qemu/hw/piix4.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * QEMU PIIX4 PCI Bridge Emulation
        !             3:  *
        !             4:  * Copyright (c) 2006 Fabrice Bellard
        !             5:  *
        !             6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !             7:  * of this software and associated documentation files (the "Software"), to deal
        !             8:  * in the Software without restriction, including without limitation the rights
        !             9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        !            10:  * copies of the Software, and to permit persons to whom the Software is
        !            11:  * furnished to do so, subject to the following conditions:
        !            12:  *
        !            13:  * The above copyright notice and this permission notice shall be included in
        !            14:  * all copies or substantial portions of the Software.
        !            15:  *
        !            16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
        !            19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        !            21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
        !            22:  * THE SOFTWARE.
        !            23:  */
        !            24: 
        !            25: #include "hw.h"
        !            26: #include "pc.h"
        !            27: #include "pci.h"
        !            28: #include "isa.h"
        !            29: #include "sysbus.h"
        !            30: 
        !            31: PCIDevice *piix4_dev;
        !            32: 
        !            33: static void piix4_reset(void *opaque)
        !            34: {
        !            35:     PCIDevice *d = opaque;
        !            36:     uint8_t *pci_conf = d->config;
        !            37: 
        !            38:     pci_conf[0x04] = 0x07; // master, memory and I/O
        !            39:     pci_conf[0x05] = 0x00;
        !            40:     pci_conf[0x06] = 0x00;
        !            41:     pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
        !            42:     pci_conf[0x4c] = 0x4d;
        !            43:     pci_conf[0x4e] = 0x03;
        !            44:     pci_conf[0x4f] = 0x00;
        !            45:     pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
        !            46:     pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
        !            47:     pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
        !            48:     pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
        !            49:     pci_conf[0x69] = 0x02;
        !            50:     pci_conf[0x70] = 0x80;
        !            51:     pci_conf[0x76] = 0x0c;
        !            52:     pci_conf[0x77] = 0x0c;
        !            53:     pci_conf[0x78] = 0x02;
        !            54:     pci_conf[0x79] = 0x00;
        !            55:     pci_conf[0x80] = 0x00;
        !            56:     pci_conf[0x82] = 0x00;
        !            57:     pci_conf[0xa0] = 0x08;
        !            58:     pci_conf[0xa2] = 0x00;
        !            59:     pci_conf[0xa3] = 0x00;
        !            60:     pci_conf[0xa4] = 0x00;
        !            61:     pci_conf[0xa5] = 0x00;
        !            62:     pci_conf[0xa6] = 0x00;
        !            63:     pci_conf[0xa7] = 0x00;
        !            64:     pci_conf[0xa8] = 0x0f;
        !            65:     pci_conf[0xaa] = 0x00;
        !            66:     pci_conf[0xab] = 0x00;
        !            67:     pci_conf[0xac] = 0x00;
        !            68:     pci_conf[0xae] = 0x00;
        !            69: }
        !            70: 
        !            71: static void piix_save(QEMUFile* f, void *opaque)
        !            72: {
        !            73:     PCIDevice *d = opaque;
        !            74:     pci_device_save(d, f);
        !            75: }
        !            76: 
        !            77: static int piix_load(QEMUFile* f, void *opaque, int version_id)
        !            78: {
        !            79:     PCIDevice *d = opaque;
        !            80:     if (version_id != 2)
        !            81:         return -EINVAL;
        !            82:     return pci_device_load(d, f);
        !            83: }
        !            84: 
        !            85: static int piix4_initfn(PCIDevice *d)
        !            86: {
        !            87:     uint8_t *pci_conf;
        !            88: 
        !            89:     isa_bus_new(&d->qdev);
        !            90:     register_savevm("PIIX4", 0, 2, piix_save, piix_load, d);
        !            91: 
        !            92:     pci_conf = d->config;
        !            93:     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
        !            94:     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_0); // 82371AB/EB/MB PIIX4 PCI-to-ISA bridge
        !            95:     pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
        !            96:     pci_conf[PCI_HEADER_TYPE] =
        !            97:         PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
        !            98: 
        !            99:     piix4_dev = d;
        !           100:     qemu_register_reset(piix4_reset, d);
        !           101:     return 0;
        !           102: }
        !           103: 
        !           104: int piix4_init(PCIBus *bus, int devfn)
        !           105: {
        !           106:     PCIDevice *d;
        !           107: 
        !           108:     d = pci_create_simple(bus, devfn, "PIIX4");
        !           109:     return d->devfn;
        !           110: }
        !           111: 
        !           112: static PCIDeviceInfo piix4_info[] = {
        !           113:     {
        !           114:         .qdev.name    = "PIIX4",
        !           115:         .qdev.desc    = "ISA bridge",
        !           116:         .qdev.size    = sizeof(PCIDevice),
        !           117:         .qdev.no_user = 1,
        !           118:         .init         = piix4_initfn,
        !           119:     },{
        !           120:         /* end of list */
        !           121:     }
        !           122: };
        !           123: 
        !           124: static void piix4_register(void)
        !           125: {
        !           126:     pci_qdev_register_many(piix4_info);
        !           127: }
        !           128: device_init(piix4_register);

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