563 lines
18 KiB
C
563 lines
18 KiB
C
/*
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* QEMU i440FX/PIIX3 PCI Bridge Emulation
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "pc.h"
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#include "pci.h"
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#include "pci_host.h"
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#include "isa.h"
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#include "sysbus.h"
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#include "range.h"
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#include "xen.h"
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/*
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* I440FX chipset data sheet.
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* http://download.intel.com/design/chipsets/datashts/29054901.pdf
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*/
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typedef PCIHostState I440FXState;
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#define PIIX_NUM_PIC_IRQS 16 /* i8259 * 2 */
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#define PIIX_NUM_PIRQS 4ULL /* PIRQ[A-D] */
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#define XEN_PIIX_NUM_PIRQS 128ULL
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#define PIIX_PIRQC 0x60
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typedef struct PIIX3State {
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PCIDevice dev;
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/*
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* bitmap to track pic levels.
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* The pic level is the logical OR of all the PCI irqs mapped to it
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* So one PIC level is tracked by PIIX_NUM_PIRQS bits.
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*
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* PIRQ is mapped to PIC pins, we track it by
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* PIIX_NUM_PIRQS * PIIX_NUM_PIC_IRQS = 64 bits with
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* pic_irq * PIIX_NUM_PIRQS + pirq
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*/
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#if PIIX_NUM_PIC_IRQS * PIIX_NUM_PIRQS > 64
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#error "unable to encode pic state in 64bit in pic_levels."
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#endif
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uint64_t pic_levels;
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qemu_irq *pic;
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/* This member isn't used. Just for save/load compatibility */
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int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS];
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} PIIX3State;
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typedef struct PAMMemoryRegion {
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MemoryRegion mem;
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bool initialized;
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} PAMMemoryRegion;
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struct PCII440FXState {
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PCIDevice dev;
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MemoryRegion *system_memory;
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MemoryRegion *pci_address_space;
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MemoryRegion *ram_memory;
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MemoryRegion pci_hole;
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MemoryRegion pci_hole_64bit;
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PAMMemoryRegion pam_regions[13];
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MemoryRegion smram_region;
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uint8_t smm_enabled;
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PIIX3State *piix3;
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};
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#define I440FX_PAM 0x59
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#define I440FX_PAM_SIZE 7
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#define I440FX_SMRAM 0x72
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static void piix3_set_irq(void *opaque, int pirq, int level);
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static void piix3_write_config_xen(PCIDevice *dev,
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uint32_t address, uint32_t val, int len);
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/* return the global irq number corresponding to a given device irq
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pin. We could also use the bus number to have a more precise
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mapping. */
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static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx)
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{
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int slot_addend;
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slot_addend = (pci_dev->devfn >> 3) - 1;
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return (pci_intx + slot_addend) & 3;
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}
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static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r,
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PAMMemoryRegion *mem)
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{
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if (mem->initialized) {
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memory_region_del_subregion(d->system_memory, &mem->mem);
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memory_region_destroy(&mem->mem);
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}
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// printf("ISA mapping %08x-0x%08x: %d\n", start, end, r);
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switch(r) {
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case 3:
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/* RAM */
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memory_region_init_alias(&mem->mem, "pam-ram", d->ram_memory,
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start, end - start);
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break;
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case 1:
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/* ROM (XXX: not quite correct) */
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memory_region_init_alias(&mem->mem, "pam-rom", d->ram_memory,
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start, end - start);
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memory_region_set_readonly(&mem->mem, true);
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break;
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case 2:
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case 0:
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/* XXX: should distinguish read/write cases */
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memory_region_init_alias(&mem->mem, "pam-pci", d->pci_address_space,
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start, end - start);
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break;
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}
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memory_region_add_subregion_overlap(d->system_memory,
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start, &mem->mem, 1);
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mem->initialized = true;
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}
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static void i440fx_update_memory_mappings(PCII440FXState *d)
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{
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int i, r;
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uint32_t smram;
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bool smram_enabled;
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memory_region_transaction_begin();
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update_pam(d, 0xf0000, 0x100000, (d->dev.config[I440FX_PAM] >> 4) & 3,
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&d->pam_regions[0]);
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for(i = 0; i < 12; i++) {
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r = (d->dev.config[(i >> 1) + (I440FX_PAM + 1)] >> ((i & 1) * 4)) & 3;
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update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r,
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&d->pam_regions[i+1]);
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}
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smram = d->dev.config[I440FX_SMRAM];
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smram_enabled = (d->smm_enabled && (smram & 0x08)) || (smram & 0x40);
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memory_region_set_enabled(&d->smram_region, !smram_enabled);
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memory_region_transaction_commit();
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}
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static void i440fx_set_smm(int val, void *arg)
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{
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PCII440FXState *d = arg;
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val = (val != 0);
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if (d->smm_enabled != val) {
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d->smm_enabled = val;
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i440fx_update_memory_mappings(d);
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}
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}
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static void i440fx_write_config(PCIDevice *dev,
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uint32_t address, uint32_t val, int len)
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{
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PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
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/* XXX: implement SMRAM.D_LOCK */
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pci_default_write_config(dev, address, val, len);
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if (ranges_overlap(address, len, I440FX_PAM, I440FX_PAM_SIZE) ||
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range_covers_byte(address, len, I440FX_SMRAM)) {
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i440fx_update_memory_mappings(d);
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}
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}
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static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id)
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{
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PCII440FXState *d = opaque;
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int ret, i;
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ret = pci_device_load(&d->dev, f);
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if (ret < 0)
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return ret;
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i440fx_update_memory_mappings(d);
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qemu_get_8s(f, &d->smm_enabled);
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if (version_id == 2) {
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for (i = 0; i < PIIX_NUM_PIRQS; i++) {
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qemu_get_be32(f); /* dummy load for compatibility */
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}
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}
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return 0;
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}
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static int i440fx_post_load(void *opaque, int version_id)
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{
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PCII440FXState *d = opaque;
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i440fx_update_memory_mappings(d);
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return 0;
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}
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static const VMStateDescription vmstate_i440fx = {
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.name = "I440FX",
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.version_id = 3,
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.minimum_version_id = 3,
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.minimum_version_id_old = 1,
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.load_state_old = i440fx_load_old,
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.post_load = i440fx_post_load,
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.fields = (VMStateField []) {
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VMSTATE_PCI_DEVICE(dev, PCII440FXState),
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VMSTATE_UINT8(smm_enabled, PCII440FXState),
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VMSTATE_END_OF_LIST()
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}
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};
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static int i440fx_pcihost_initfn(SysBusDevice *dev)
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{
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I440FXState *s = FROM_SYSBUS(I440FXState, dev);
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memory_region_init_io(&s->conf_mem, &pci_host_conf_le_ops, s,
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"pci-conf-idx", 4);
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sysbus_add_io(dev, 0xcf8, &s->conf_mem);
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sysbus_init_ioports(&s->busdev, 0xcf8, 4);
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memory_region_init_io(&s->data_mem, &pci_host_data_le_ops, s,
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"pci-conf-data", 4);
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sysbus_add_io(dev, 0xcfc, &s->data_mem);
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sysbus_init_ioports(&s->busdev, 0xcfc, 4);
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return 0;
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}
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static int i440fx_initfn(PCIDevice *dev)
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{
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PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
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d->dev.config[I440FX_SMRAM] = 0x02;
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cpu_smm_register(&i440fx_set_smm, d);
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return 0;
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}
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static PCIBus *i440fx_common_init(const char *device_name,
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PCII440FXState **pi440fx_state,
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int *piix3_devfn,
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qemu_irq *pic,
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MemoryRegion *address_space_mem,
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MemoryRegion *address_space_io,
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ram_addr_t ram_size,
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target_phys_addr_t pci_hole_start,
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target_phys_addr_t pci_hole_size,
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target_phys_addr_t pci_hole64_start,
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target_phys_addr_t pci_hole64_size,
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MemoryRegion *pci_address_space,
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MemoryRegion *ram_memory)
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{
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DeviceState *dev;
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PCIBus *b;
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PCIDevice *d;
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I440FXState *s;
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PIIX3State *piix3;
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PCII440FXState *f;
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dev = qdev_create(NULL, "i440FX-pcihost");
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s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev));
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s->address_space = address_space_mem;
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b = pci_bus_new(&s->busdev.qdev, NULL, pci_address_space,
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address_space_io, 0);
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s->bus = b;
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qdev_init_nofail(dev);
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qdev_property_add_child(qdev_get_root(), "i440fx", dev, NULL);
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d = pci_create_simple(b, 0, device_name);
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*pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
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f = *pi440fx_state;
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f->system_memory = address_space_mem;
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f->pci_address_space = pci_address_space;
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f->ram_memory = ram_memory;
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memory_region_init_alias(&f->pci_hole, "pci-hole", f->pci_address_space,
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pci_hole_start, pci_hole_size);
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memory_region_add_subregion(f->system_memory, pci_hole_start, &f->pci_hole);
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memory_region_init_alias(&f->pci_hole_64bit, "pci-hole64",
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f->pci_address_space,
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pci_hole64_start, pci_hole64_size);
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if (pci_hole64_size) {
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memory_region_add_subregion(f->system_memory, pci_hole64_start,
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&f->pci_hole_64bit);
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}
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memory_region_init_alias(&f->smram_region, "smram-region",
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f->pci_address_space, 0xa0000, 0x20000);
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memory_region_add_subregion_overlap(f->system_memory, 0xa0000,
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&f->smram_region, 1);
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memory_region_set_enabled(&f->smram_region, false);
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/* Xen supports additional interrupt routes from the PCI devices to
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* the IOAPIC: the four pins of each PCI device on the bus are also
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* connected to the IOAPIC directly.
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* These additional routes can be discovered through ACPI. */
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if (xen_enabled()) {
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piix3 = DO_UPCAST(PIIX3State, dev,
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pci_create_simple_multifunction(b, -1, true, "PIIX3-xen"));
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pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq,
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piix3, XEN_PIIX_NUM_PIRQS);
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} else {
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piix3 = DO_UPCAST(PIIX3State, dev,
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pci_create_simple_multifunction(b, -1, true, "PIIX3"));
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pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3,
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PIIX_NUM_PIRQS);
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}
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qdev_property_add_child(dev, "piix3", &piix3->dev.qdev, NULL);
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piix3->pic = pic;
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(*pi440fx_state)->piix3 = piix3;
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*piix3_devfn = piix3->dev.devfn;
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ram_size = ram_size / 8 / 1024 / 1024;
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if (ram_size > 255)
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ram_size = 255;
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(*pi440fx_state)->dev.config[0x57]=ram_size;
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i440fx_update_memory_mappings(f);
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return b;
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}
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PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn,
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qemu_irq *pic,
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MemoryRegion *address_space_mem,
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MemoryRegion *address_space_io,
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ram_addr_t ram_size,
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target_phys_addr_t pci_hole_start,
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target_phys_addr_t pci_hole_size,
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target_phys_addr_t pci_hole64_start,
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target_phys_addr_t pci_hole64_size,
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MemoryRegion *pci_memory, MemoryRegion *ram_memory)
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{
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PCIBus *b;
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b = i440fx_common_init("i440FX", pi440fx_state, piix3_devfn, pic,
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address_space_mem, address_space_io, ram_size,
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pci_hole_start, pci_hole_size,
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pci_hole64_size, pci_hole64_size,
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pci_memory, ram_memory);
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return b;
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}
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/* PIIX3 PCI to ISA bridge */
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static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq)
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{
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qemu_set_irq(piix3->pic[pic_irq],
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!!(piix3->pic_levels &
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(((1ULL << PIIX_NUM_PIRQS) - 1) <<
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(pic_irq * PIIX_NUM_PIRQS))));
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}
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static void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level)
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{
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int pic_irq;
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uint64_t mask;
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pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
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if (pic_irq >= PIIX_NUM_PIC_IRQS) {
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return;
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}
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mask = 1ULL << ((pic_irq * PIIX_NUM_PIRQS) + pirq);
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piix3->pic_levels &= ~mask;
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piix3->pic_levels |= mask * !!level;
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piix3_set_irq_pic(piix3, pic_irq);
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}
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static void piix3_set_irq(void *opaque, int pirq, int level)
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{
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PIIX3State *piix3 = opaque;
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piix3_set_irq_level(piix3, pirq, level);
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}
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/* irq routing is changed. so rebuild bitmap */
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static void piix3_update_irq_levels(PIIX3State *piix3)
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{
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int pirq;
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piix3->pic_levels = 0;
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for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
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piix3_set_irq_level(piix3, pirq,
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pci_bus_get_irq_level(piix3->dev.bus, pirq));
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}
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}
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static void piix3_write_config(PCIDevice *dev,
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uint32_t address, uint32_t val, int len)
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{
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pci_default_write_config(dev, address, val, len);
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if (ranges_overlap(address, len, PIIX_PIRQC, 4)) {
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PIIX3State *piix3 = DO_UPCAST(PIIX3State, dev, dev);
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int pic_irq;
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piix3_update_irq_levels(piix3);
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for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) {
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piix3_set_irq_pic(piix3, pic_irq);
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}
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}
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}
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static void piix3_write_config_xen(PCIDevice *dev,
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uint32_t address, uint32_t val, int len)
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{
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xen_piix_pci_write_config_client(address, val, len);
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piix3_write_config(dev, address, val, len);
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}
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static void piix3_reset(void *opaque)
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{
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PIIX3State *d = opaque;
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uint8_t *pci_conf = d->dev.config;
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pci_conf[0x04] = 0x07; // master, memory and I/O
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pci_conf[0x05] = 0x00;
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pci_conf[0x06] = 0x00;
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pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
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pci_conf[0x4c] = 0x4d;
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pci_conf[0x4e] = 0x03;
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pci_conf[0x4f] = 0x00;
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pci_conf[0x60] = 0x80;
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pci_conf[0x61] = 0x80;
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pci_conf[0x62] = 0x80;
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pci_conf[0x63] = 0x80;
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pci_conf[0x69] = 0x02;
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pci_conf[0x70] = 0x80;
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pci_conf[0x76] = 0x0c;
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pci_conf[0x77] = 0x0c;
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pci_conf[0x78] = 0x02;
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pci_conf[0x79] = 0x00;
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pci_conf[0x80] = 0x00;
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pci_conf[0x82] = 0x00;
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pci_conf[0xa0] = 0x08;
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pci_conf[0xa2] = 0x00;
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pci_conf[0xa3] = 0x00;
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pci_conf[0xa4] = 0x00;
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pci_conf[0xa5] = 0x00;
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pci_conf[0xa6] = 0x00;
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pci_conf[0xa7] = 0x00;
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pci_conf[0xa8] = 0x0f;
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pci_conf[0xaa] = 0x00;
|
|
pci_conf[0xab] = 0x00;
|
|
pci_conf[0xac] = 0x00;
|
|
pci_conf[0xae] = 0x00;
|
|
|
|
d->pic_levels = 0;
|
|
}
|
|
|
|
static int piix3_post_load(void *opaque, int version_id)
|
|
{
|
|
PIIX3State *piix3 = opaque;
|
|
piix3_update_irq_levels(piix3);
|
|
return 0;
|
|
}
|
|
|
|
static void piix3_pre_save(void *opaque)
|
|
{
|
|
int i;
|
|
PIIX3State *piix3 = opaque;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(piix3->pci_irq_levels_vmstate); i++) {
|
|
piix3->pci_irq_levels_vmstate[i] =
|
|
pci_bus_get_irq_level(piix3->dev.bus, i);
|
|
}
|
|
}
|
|
|
|
static const VMStateDescription vmstate_piix3 = {
|
|
.name = "PIIX3",
|
|
.version_id = 3,
|
|
.minimum_version_id = 2,
|
|
.minimum_version_id_old = 2,
|
|
.post_load = piix3_post_load,
|
|
.pre_save = piix3_pre_save,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_PCI_DEVICE(dev, PIIX3State),
|
|
VMSTATE_INT32_ARRAY_V(pci_irq_levels_vmstate, PIIX3State,
|
|
PIIX_NUM_PIRQS, 3),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static int piix3_initfn(PCIDevice *dev)
|
|
{
|
|
PIIX3State *d = DO_UPCAST(PIIX3State, dev, dev);
|
|
|
|
isa_bus_new(&d->dev.qdev, pci_address_space_io(dev));
|
|
qemu_register_reset(piix3_reset, d);
|
|
return 0;
|
|
}
|
|
|
|
static PCIDeviceInfo i440fx_info[] = {
|
|
{
|
|
.qdev.name = "i440FX",
|
|
.qdev.desc = "Host bridge",
|
|
.qdev.size = sizeof(PCII440FXState),
|
|
.qdev.vmsd = &vmstate_i440fx,
|
|
.qdev.no_user = 1,
|
|
.no_hotplug = 1,
|
|
.init = i440fx_initfn,
|
|
.config_write = i440fx_write_config,
|
|
.vendor_id = PCI_VENDOR_ID_INTEL,
|
|
.device_id = PCI_DEVICE_ID_INTEL_82441,
|
|
.revision = 0x02,
|
|
.class_id = PCI_CLASS_BRIDGE_HOST,
|
|
},{
|
|
.qdev.name = "PIIX3",
|
|
.qdev.desc = "ISA bridge",
|
|
.qdev.size = sizeof(PIIX3State),
|
|
.qdev.vmsd = &vmstate_piix3,
|
|
.qdev.no_user = 1,
|
|
.no_hotplug = 1,
|
|
.init = piix3_initfn,
|
|
.config_write = piix3_write_config,
|
|
.vendor_id = PCI_VENDOR_ID_INTEL,
|
|
.device_id = PCI_DEVICE_ID_INTEL_82371SB_0, // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
|
|
.class_id = PCI_CLASS_BRIDGE_ISA,
|
|
},{
|
|
.qdev.name = "PIIX3-xen",
|
|
.qdev.desc = "ISA bridge",
|
|
.qdev.size = sizeof(PIIX3State),
|
|
.qdev.vmsd = &vmstate_piix3,
|
|
.qdev.no_user = 1,
|
|
.no_hotplug = 1,
|
|
.init = piix3_initfn,
|
|
.config_write = piix3_write_config_xen,
|
|
.vendor_id = PCI_VENDOR_ID_INTEL,
|
|
.device_id = PCI_DEVICE_ID_INTEL_82371SB_0, // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
|
|
.class_id = PCI_CLASS_BRIDGE_ISA,
|
|
},{
|
|
/* end of list */
|
|
}
|
|
};
|
|
|
|
static SysBusDeviceInfo i440fx_pcihost_info = {
|
|
.init = i440fx_pcihost_initfn,
|
|
.qdev.name = "i440FX-pcihost",
|
|
.qdev.fw_name = "pci",
|
|
.qdev.size = sizeof(I440FXState),
|
|
.qdev.no_user = 1,
|
|
};
|
|
|
|
static void i440fx_register(void)
|
|
{
|
|
sysbus_register_withprop(&i440fx_pcihost_info);
|
|
pci_qdev_register_many(i440fx_info);
|
|
}
|
|
device_init(i440fx_register);
|