893 lines
27 KiB
C
893 lines
27 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 "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/i386/pc.h"
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#include "hw/pci/pci.h"
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#include "hw/pci/pci_host.h"
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#include "hw/isa/isa.h"
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#include "hw/sysbus.h"
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#include "qapi/error.h"
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#include "qemu/range.h"
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#include "hw/xen/xen.h"
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#include "hw/pci-host/pam.h"
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#include "sysemu/sysemu.h"
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#include "hw/i386/ioapic.h"
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#include "qapi/visitor.h"
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#include "qemu/error-report.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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#define I440FX_PCI_HOST_BRIDGE(obj) \
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OBJECT_CHECK(I440FXState, (obj), TYPE_I440FX_PCI_HOST_BRIDGE)
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typedef struct I440FXState {
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PCIHostState parent_obj;
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Range pci_hole;
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uint64_t pci_hole64_size;
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uint32_t short_root_bus;
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} 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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/* Reset Control Register contents */
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uint8_t rcr;
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/* IO memory region for Reset Control Register (RCR_IOPORT) */
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MemoryRegion rcr_mem;
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} PIIX3State;
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#define TYPE_PIIX3_PCI_DEVICE "pci-piix3"
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#define PIIX3_PCI_DEVICE(obj) \
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OBJECT_CHECK(PIIX3State, (obj), TYPE_PIIX3_PCI_DEVICE)
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#define I440FX_PCI_DEVICE(obj) \
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OBJECT_CHECK(PCII440FXState, (obj), TYPE_I440FX_PCI_DEVICE)
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struct PCII440FXState {
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/*< private >*/
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PCIDevice parent_obj;
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/*< public >*/
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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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PAMMemoryRegion pam_regions[13];
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MemoryRegion smram_region;
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MemoryRegion smram, low_smram;
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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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/* Older coreboot versions (4.0 and older) read a config register that doesn't
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* exist in real hardware, to get the RAM size from QEMU.
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*/
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#define I440FX_COREBOOT_RAM_SIZE 0x57
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static void piix3_set_irq(void *opaque, int pirq, int level);
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static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pci_intx);
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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 i440fx_update_memory_mappings(PCII440FXState *d)
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{
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int i;
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PCIDevice *pd = PCI_DEVICE(d);
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memory_region_transaction_begin();
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for (i = 0; i < 13; i++) {
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pam_update(&d->pam_regions[i], i,
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pd->config[I440FX_PAM + ((i + 1) / 2)]);
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}
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memory_region_set_enabled(&d->smram_region,
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!(pd->config[I440FX_SMRAM] & SMRAM_D_OPEN));
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memory_region_set_enabled(&d->smram,
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pd->config[I440FX_SMRAM] & SMRAM_G_SMRAME);
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memory_region_transaction_commit();
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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 = I440FX_PCI_DEVICE(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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PCIDevice *pd = PCI_DEVICE(d);
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int ret, i;
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uint8_t smm_enabled;
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ret = pci_device_load(pd, 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, &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(parent_obj, PCII440FXState),
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/* Used to be smm_enabled, which was basically always zero because
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* SeaBIOS hardly uses SMM. SMRAM is now handled by CPU code.
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*/
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VMSTATE_UNUSED(1),
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VMSTATE_END_OF_LIST()
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}
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};
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static void i440fx_pcihost_get_pci_hole_start(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj);
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uint64_t val64;
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uint32_t value;
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val64 = range_is_empty(&s->pci_hole) ? 0 : range_lob(&s->pci_hole);
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value = val64;
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assert(value == val64);
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visit_type_uint32(v, name, &value, errp);
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}
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static void i440fx_pcihost_get_pci_hole_end(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj);
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uint64_t val64;
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uint32_t value;
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val64 = range_is_empty(&s->pci_hole) ? 0 : range_upb(&s->pci_hole) + 1;
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value = val64;
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assert(value == val64);
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visit_type_uint32(v, name, &value, errp);
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}
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static void i440fx_pcihost_get_pci_hole64_start(Object *obj, Visitor *v,
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const char *name,
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void *opaque, Error **errp)
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{
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PCIHostState *h = PCI_HOST_BRIDGE(obj);
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Range w64;
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uint64_t value;
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pci_bus_get_w64_range(h->bus, &w64);
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value = range_is_empty(&w64) ? 0 : range_lob(&w64);
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visit_type_uint64(v, name, &value, errp);
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}
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static void i440fx_pcihost_get_pci_hole64_end(Object *obj, Visitor *v,
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const char *name, void *opaque,
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Error **errp)
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{
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PCIHostState *h = PCI_HOST_BRIDGE(obj);
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Range w64;
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uint64_t value;
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pci_bus_get_w64_range(h->bus, &w64);
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value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1;
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visit_type_uint64(v, name, &value, errp);
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}
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static void i440fx_pcihost_initfn(Object *obj)
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{
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PCIHostState *s = PCI_HOST_BRIDGE(obj);
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memory_region_init_io(&s->conf_mem, obj, &pci_host_conf_le_ops, s,
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"pci-conf-idx", 4);
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memory_region_init_io(&s->data_mem, obj, &pci_host_data_le_ops, s,
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"pci-conf-data", 4);
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object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "uint32",
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i440fx_pcihost_get_pci_hole_start,
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NULL, NULL, NULL, NULL);
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object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "uint32",
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i440fx_pcihost_get_pci_hole_end,
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NULL, NULL, NULL, NULL);
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object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "uint64",
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i440fx_pcihost_get_pci_hole64_start,
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NULL, NULL, NULL, NULL);
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object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "uint64",
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i440fx_pcihost_get_pci_hole64_end,
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NULL, NULL, NULL, NULL);
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}
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static void i440fx_pcihost_realize(DeviceState *dev, Error **errp)
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{
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PCIHostState *s = PCI_HOST_BRIDGE(dev);
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SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
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sysbus_add_io(sbd, 0xcf8, &s->conf_mem);
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sysbus_init_ioports(sbd, 0xcf8, 4);
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sysbus_add_io(sbd, 0xcfc, &s->data_mem);
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sysbus_init_ioports(sbd, 0xcfc, 4);
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}
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static void i440fx_realize(PCIDevice *dev, Error **errp)
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{
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dev->config[I440FX_SMRAM] = 0x02;
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if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) {
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warn_report("i440fx doesn't support emulated iommu");
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}
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}
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PCIBus *i440fx_init(const char *host_type, const char *pci_type,
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PCII440FXState **pi440fx_state,
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int *piix3_devfn,
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ISABus **isa_bus, 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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ram_addr_t below_4g_mem_size,
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ram_addr_t above_4g_mem_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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PCIHostState *s;
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PIIX3State *piix3;
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PCII440FXState *f;
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unsigned i;
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I440FXState *i440fx;
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dev = qdev_create(NULL, host_type);
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s = PCI_HOST_BRIDGE(dev);
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b = pci_bus_new(dev, NULL, pci_address_space,
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address_space_io, 0, TYPE_PCI_BUS);
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s->bus = b;
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object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL);
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qdev_init_nofail(dev);
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d = pci_create_simple(b, 0, pci_type);
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*pi440fx_state = I440FX_PCI_DEVICE(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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i440fx = I440FX_PCI_HOST_BRIDGE(dev);
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range_set_bounds(&i440fx->pci_hole, below_4g_mem_size,
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IO_APIC_DEFAULT_ADDRESS - 1);
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/* setup pci memory mapping */
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pc_pci_as_mapping_init(OBJECT(f), f->system_memory,
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f->pci_address_space);
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/* if *disabled* show SMRAM to all CPUs */
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memory_region_init_alias(&f->smram_region, OBJECT(d), "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, true);
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/* smram, as seen by SMM CPUs */
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memory_region_init(&f->smram, OBJECT(d), "smram", 1ull << 32);
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memory_region_set_enabled(&f->smram, true);
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memory_region_init_alias(&f->low_smram, OBJECT(d), "smram-low",
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f->ram_memory, 0xa0000, 0x20000);
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memory_region_set_enabled(&f->low_smram, true);
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memory_region_add_subregion(&f->smram, 0xa0000, &f->low_smram);
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object_property_add_const_link(qdev_get_machine(), "smram",
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OBJECT(&f->smram), &error_abort);
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init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space,
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&f->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE);
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for (i = 0; i < 12; ++i) {
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init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space,
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&f->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE,
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PAM_EXPAN_SIZE);
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}
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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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PCIDevice *pci_dev = pci_create_simple_multifunction(b,
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-1, true, "PIIX3-xen");
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piix3 = PIIX3_PCI_DEVICE(pci_dev);
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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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PCIDevice *pci_dev = pci_create_simple_multifunction(b,
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-1, true, "PIIX3");
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piix3 = PIIX3_PCI_DEVICE(pci_dev);
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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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pci_bus_set_route_irq_fn(b, piix3_route_intx_pin_to_irq);
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}
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piix3->pic = pic;
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*isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0"));
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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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}
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d->config[I440FX_COREBOOT_RAM_SIZE] = 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 *find_i440fx(void)
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{
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PCIHostState *s = OBJECT_CHECK(PCIHostState,
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object_resolve_path("/machine/i440fx", NULL),
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TYPE_PCI_HOST_BRIDGE);
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return s ? s->bus : NULL;
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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_internal(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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}
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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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|
|
pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
|
|
if (pic_irq >= PIIX_NUM_PIC_IRQS) {
|
|
return;
|
|
}
|
|
|
|
piix3_set_irq_level_internal(piix3, pirq, level);
|
|
|
|
piix3_set_irq_pic(piix3, pic_irq);
|
|
}
|
|
|
|
static void piix3_set_irq(void *opaque, int pirq, int level)
|
|
{
|
|
PIIX3State *piix3 = opaque;
|
|
piix3_set_irq_level(piix3, pirq, level);
|
|
}
|
|
|
|
static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pin)
|
|
{
|
|
PIIX3State *piix3 = opaque;
|
|
int irq = piix3->dev.config[PIIX_PIRQC + pin];
|
|
PCIINTxRoute route;
|
|
|
|
if (irq < PIIX_NUM_PIC_IRQS) {
|
|
route.mode = PCI_INTX_ENABLED;
|
|
route.irq = irq;
|
|
} else {
|
|
route.mode = PCI_INTX_DISABLED;
|
|
route.irq = -1;
|
|
}
|
|
return route;
|
|
}
|
|
|
|
/* irq routing is changed. so rebuild bitmap */
|
|
static void piix3_update_irq_levels(PIIX3State *piix3)
|
|
{
|
|
int pirq;
|
|
|
|
piix3->pic_levels = 0;
|
|
for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
|
|
piix3_set_irq_level(piix3, pirq,
|
|
pci_bus_get_irq_level(piix3->dev.bus, pirq));
|
|
}
|
|
}
|
|
|
|
static void piix3_write_config(PCIDevice *dev,
|
|
uint32_t address, uint32_t val, int len)
|
|
{
|
|
pci_default_write_config(dev, address, val, len);
|
|
if (ranges_overlap(address, len, PIIX_PIRQC, 4)) {
|
|
PIIX3State *piix3 = PIIX3_PCI_DEVICE(dev);
|
|
int pic_irq;
|
|
|
|
pci_bus_fire_intx_routing_notifier(piix3->dev.bus);
|
|
piix3_update_irq_levels(piix3);
|
|
for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) {
|
|
piix3_set_irq_pic(piix3, pic_irq);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void piix3_write_config_xen(PCIDevice *dev,
|
|
uint32_t address, uint32_t val, int len)
|
|
{
|
|
xen_piix_pci_write_config_client(address, val, len);
|
|
piix3_write_config(dev, address, val, len);
|
|
}
|
|
|
|
static void piix3_reset(void *opaque)
|
|
{
|
|
PIIX3State *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] = 0x80;
|
|
pci_conf[0x61] = 0x80;
|
|
pci_conf[0x62] = 0x80;
|
|
pci_conf[0x63] = 0x80;
|
|
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;
|
|
|
|
d->pic_levels = 0;
|
|
d->rcr = 0;
|
|
}
|
|
|
|
static int piix3_post_load(void *opaque, int version_id)
|
|
{
|
|
PIIX3State *piix3 = opaque;
|
|
int pirq;
|
|
|
|
/* Because the i8259 has not been deserialized yet, qemu_irq_raise
|
|
* might bring the system to a different state than the saved one;
|
|
* for example, the interrupt could be masked but the i8259 would
|
|
* not know that yet and would trigger an interrupt in the CPU.
|
|
*
|
|
* Here, we update irq levels without raising the interrupt.
|
|
* Interrupt state will be deserialized separately through the i8259.
|
|
*/
|
|
piix3->pic_levels = 0;
|
|
for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
|
|
piix3_set_irq_level_internal(piix3, pirq,
|
|
pci_bus_get_irq_level(piix3->dev.bus, pirq));
|
|
}
|
|
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 bool piix3_rcr_needed(void *opaque)
|
|
{
|
|
PIIX3State *piix3 = opaque;
|
|
|
|
return (piix3->rcr != 0);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_piix3_rcr = {
|
|
.name = "PIIX3/rcr",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = piix3_rcr_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT8(rcr, PIIX3State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_piix3 = {
|
|
.name = "PIIX3",
|
|
.version_id = 3,
|
|
.minimum_version_id = 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()
|
|
},
|
|
.subsections = (const VMStateDescription*[]) {
|
|
&vmstate_piix3_rcr,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
|
|
static void rcr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len)
|
|
{
|
|
PIIX3State *d = opaque;
|
|
|
|
if (val & 4) {
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
|
|
return;
|
|
}
|
|
d->rcr = val & 2; /* keep System Reset type only */
|
|
}
|
|
|
|
static uint64_t rcr_read(void *opaque, hwaddr addr, unsigned len)
|
|
{
|
|
PIIX3State *d = opaque;
|
|
|
|
return d->rcr;
|
|
}
|
|
|
|
static const MemoryRegionOps rcr_ops = {
|
|
.read = rcr_read,
|
|
.write = rcr_write,
|
|
.endianness = DEVICE_LITTLE_ENDIAN
|
|
};
|
|
|
|
static void piix3_realize(PCIDevice *dev, Error **errp)
|
|
{
|
|
PIIX3State *d = PIIX3_PCI_DEVICE(dev);
|
|
|
|
if (!isa_bus_new(DEVICE(d), get_system_memory(),
|
|
pci_address_space_io(dev), errp)) {
|
|
return;
|
|
}
|
|
|
|
memory_region_init_io(&d->rcr_mem, OBJECT(dev), &rcr_ops, d,
|
|
"piix3-reset-control", 1);
|
|
memory_region_add_subregion_overlap(pci_address_space_io(dev), RCR_IOPORT,
|
|
&d->rcr_mem, 1);
|
|
|
|
qemu_register_reset(piix3_reset, d);
|
|
}
|
|
|
|
static void pci_piix3_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
dc->desc = "ISA bridge";
|
|
dc->vmsd = &vmstate_piix3;
|
|
dc->hotpluggable = false;
|
|
k->realize = piix3_realize;
|
|
k->vendor_id = PCI_VENDOR_ID_INTEL;
|
|
/* 82371SB PIIX3 PCI-to-ISA bridge (Step A1) */
|
|
k->device_id = PCI_DEVICE_ID_INTEL_82371SB_0;
|
|
k->class_id = PCI_CLASS_BRIDGE_ISA;
|
|
/*
|
|
* Reason: part of PIIX3 southbridge, needs to be wired up by
|
|
* pc_piix.c's pc_init1()
|
|
*/
|
|
dc->user_creatable = false;
|
|
}
|
|
|
|
static const TypeInfo piix3_pci_type_info = {
|
|
.name = TYPE_PIIX3_PCI_DEVICE,
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(PIIX3State),
|
|
.abstract = true,
|
|
.class_init = pci_piix3_class_init,
|
|
};
|
|
|
|
static void piix3_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->config_write = piix3_write_config;
|
|
}
|
|
|
|
static const TypeInfo piix3_info = {
|
|
.name = "PIIX3",
|
|
.parent = TYPE_PIIX3_PCI_DEVICE,
|
|
.class_init = piix3_class_init,
|
|
};
|
|
|
|
static void piix3_xen_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->config_write = piix3_write_config_xen;
|
|
};
|
|
|
|
static const TypeInfo piix3_xen_info = {
|
|
.name = "PIIX3-xen",
|
|
.parent = TYPE_PIIX3_PCI_DEVICE,
|
|
.class_init = piix3_xen_class_init,
|
|
};
|
|
|
|
static void i440fx_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->realize = i440fx_realize;
|
|
k->config_write = i440fx_write_config;
|
|
k->vendor_id = PCI_VENDOR_ID_INTEL;
|
|
k->device_id = PCI_DEVICE_ID_INTEL_82441;
|
|
k->revision = 0x02;
|
|
k->class_id = PCI_CLASS_BRIDGE_HOST;
|
|
dc->desc = "Host bridge";
|
|
dc->vmsd = &vmstate_i440fx;
|
|
/*
|
|
* PCI-facing part of the host bridge, not usable without the
|
|
* host-facing part, which can't be device_add'ed, yet.
|
|
*/
|
|
dc->user_creatable = false;
|
|
dc->hotpluggable = false;
|
|
}
|
|
|
|
static const TypeInfo i440fx_info = {
|
|
.name = TYPE_I440FX_PCI_DEVICE,
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(PCII440FXState),
|
|
.class_init = i440fx_class_init,
|
|
};
|
|
|
|
/* IGD Passthrough Host Bridge. */
|
|
typedef struct {
|
|
uint8_t offset;
|
|
uint8_t len;
|
|
} IGDHostInfo;
|
|
|
|
/* Here we just expose minimal host bridge offset subset. */
|
|
static const IGDHostInfo igd_host_bridge_infos[] = {
|
|
{0x08, 2}, /* revision id */
|
|
{0x2c, 2}, /* sybsystem vendor id */
|
|
{0x2e, 2}, /* sybsystem id */
|
|
{0x50, 2}, /* SNB: processor graphics control register */
|
|
{0x52, 2}, /* processor graphics control register */
|
|
{0xa4, 4}, /* SNB: graphics base of stolen memory */
|
|
{0xa8, 4}, /* SNB: base of GTT stolen memory */
|
|
};
|
|
|
|
static int host_pci_config_read(int pos, int len, uint32_t *val)
|
|
{
|
|
char path[PATH_MAX];
|
|
int config_fd;
|
|
ssize_t size = sizeof(path);
|
|
/* Access real host bridge. */
|
|
int rc = snprintf(path, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
|
|
0, 0, 0, 0, "config");
|
|
int ret = 0;
|
|
|
|
if (rc >= size || rc < 0) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
config_fd = open(path, O_RDWR);
|
|
if (config_fd < 0) {
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (lseek(config_fd, pos, SEEK_SET) != pos) {
|
|
ret = -errno;
|
|
goto out;
|
|
}
|
|
|
|
do {
|
|
rc = read(config_fd, (uint8_t *)val, len);
|
|
} while (rc < 0 && (errno == EINTR || errno == EAGAIN));
|
|
if (rc != len) {
|
|
ret = -errno;
|
|
}
|
|
|
|
out:
|
|
close(config_fd);
|
|
return ret;
|
|
}
|
|
|
|
static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev)
|
|
{
|
|
uint32_t val = 0;
|
|
int rc, i, num;
|
|
int pos, len;
|
|
|
|
num = ARRAY_SIZE(igd_host_bridge_infos);
|
|
for (i = 0; i < num; i++) {
|
|
pos = igd_host_bridge_infos[i].offset;
|
|
len = igd_host_bridge_infos[i].len;
|
|
rc = host_pci_config_read(pos, len, &val);
|
|
if (rc) {
|
|
return -ENODEV;
|
|
}
|
|
pci_default_write_config(pci_dev, pos, val, len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->init = igd_pt_i440fx_initfn;
|
|
dc->desc = "IGD Passthrough Host bridge";
|
|
}
|
|
|
|
static const TypeInfo igd_passthrough_i440fx_info = {
|
|
.name = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE,
|
|
.parent = TYPE_I440FX_PCI_DEVICE,
|
|
.instance_size = sizeof(PCII440FXState),
|
|
.class_init = igd_passthrough_i440fx_class_init,
|
|
};
|
|
|
|
static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge,
|
|
PCIBus *rootbus)
|
|
{
|
|
I440FXState *s = I440FX_PCI_HOST_BRIDGE(host_bridge);
|
|
|
|
/* For backwards compat with old device paths */
|
|
if (s->short_root_bus) {
|
|
return "0000";
|
|
}
|
|
return "0000:00";
|
|
}
|
|
|
|
static Property i440fx_props[] = {
|
|
DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, I440FXState,
|
|
pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE),
|
|
DEFINE_PROP_UINT32("short_root_bus", I440FXState, short_root_bus, 0),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void i440fx_pcihost_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
|
|
|
|
hc->root_bus_path = i440fx_pcihost_root_bus_path;
|
|
dc->realize = i440fx_pcihost_realize;
|
|
dc->fw_name = "pci";
|
|
dc->props = i440fx_props;
|
|
/* Reason: needs to be wired up by pc_init1 */
|
|
dc->user_creatable = false;
|
|
}
|
|
|
|
static const TypeInfo i440fx_pcihost_info = {
|
|
.name = TYPE_I440FX_PCI_HOST_BRIDGE,
|
|
.parent = TYPE_PCI_HOST_BRIDGE,
|
|
.instance_size = sizeof(I440FXState),
|
|
.instance_init = i440fx_pcihost_initfn,
|
|
.class_init = i440fx_pcihost_class_init,
|
|
};
|
|
|
|
static void i440fx_register_types(void)
|
|
{
|
|
type_register_static(&i440fx_info);
|
|
type_register_static(&igd_passthrough_i440fx_info);
|
|
type_register_static(&piix3_pci_type_info);
|
|
type_register_static(&piix3_info);
|
|
type_register_static(&piix3_xen_info);
|
|
type_register_static(&i440fx_pcihost_info);
|
|
}
|
|
|
|
type_init(i440fx_register_types)
|