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qemu-e2k/hw/isa/lpc_ich9.c
Bernhard Beschow 295385127e hw/i386/pc_q35: Wire ICH9 LPC function's interrupts before its realize() 
When the board assigns the ISA IRQs after the device's realize(), internal
devices such as the RTC can't be wired in ich9_lpc_realize() since the qemu_irqs
are still NULL. Fix that by assigning the ISA interrupts before realize().

This change is necessary for PIIX consolidation because PIIX4 wires the RTC
interrupts in its realize() method, so PIIX3 needs to do so as well. Since the
PC and Q35 boards share RTC code, and since PIIX3 needs the change, ICH9 needs
to be adapted as well.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20231007123843.127151-9-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-10-22 05:18:16 -04:00

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/*
* QEMU ICH9 Emulation
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2009, 2010, 2011
* Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
*
* This is based on piix.c, but heavily modified.
*
* 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 "qemu/log.h"
#include "cpu.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/range.h"
#include "hw/dma/i8257.h"
#include "hw/isa/isa.h"
#include "migration/vmstate.h"
#include "hw/irq.h"
#include "hw/isa/apm.h"
#include "hw/pci/pci.h"
#include "hw/southbridge/ich9.h"
#include "hw/i386/pc.h"
#include "hw/acpi/acpi.h"
#include "hw/acpi/ich9.h"
#include "hw/pci/pci_bus.h"
#include "hw/qdev-properties.h"
#include "sysemu/runstate.h"
#include "sysemu/sysemu.h"
#include "hw/core/cpu.h"
#include "hw/nvram/fw_cfg.h"
#include "qemu/cutils.h"
#include "hw/acpi/acpi_aml_interface.h"
#include "trace.h"
/*****************************************************************************/
/* ICH9 LPC PCI to ISA bridge */
/* chipset configuration register
* to access chipset configuration registers, pci_[sg]et_{byte, word, long}
* are used.
* Although it's not pci configuration space, it's little endian as Intel.
*/
static void ich9_cc_update_ir(uint8_t irr[PCI_NUM_PINS], uint16_t ir)
{
int intx;
for (intx = 0; intx < PCI_NUM_PINS; intx++) {
irr[intx] = (ir >> (intx * ICH9_CC_DIR_SHIFT)) & ICH9_CC_DIR_MASK;
}
}
static void ich9_cc_update(ICH9LPCState *lpc)
{
int slot;
int pci_intx;
const int reg_offsets[] = {
ICH9_CC_D25IR,
ICH9_CC_D26IR,
ICH9_CC_D27IR,
ICH9_CC_D28IR,
ICH9_CC_D29IR,
ICH9_CC_D30IR,
ICH9_CC_D31IR,
};
const int *offset;
/* D{25 - 31}IR, but D30IR is read only to 0. */
for (slot = 25, offset = reg_offsets; slot < 32; slot++, offset++) {
if (slot == 30) {
continue;
}
ich9_cc_update_ir(lpc->irr[slot],
pci_get_word(lpc->chip_config + *offset));
}
/*
* D30: DMI2PCI bridge
* It is arbitrarily decided how INTx lines of PCI devices behind
* the bridge are connected to pirq lines. Our choice is PIRQ[E-H].
* INT[A-D] are connected to PIRQ[E-H]
*/
for (pci_intx = 0; pci_intx < PCI_NUM_PINS; pci_intx++) {
lpc->irr[30][pci_intx] = pci_intx + 4;
}
}
static void ich9_cc_init(ICH9LPCState *lpc)
{
int slot;
int intx;
/* the default irq routing is arbitrary as long as it matches with
* acpi irq routing table.
* The one that is incompatible with piix_pci(= bochs) one is
* intentionally chosen to let the users know that the different
* board is used.
*
* int[A-D] -> pirq[E-F]
* avoid pirq A-D because they are used for pci express port
*/
for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
for (intx = 0; intx < PCI_NUM_PINS; intx++) {
lpc->irr[slot][intx] = (slot + intx) % 4 + 4;
}
}
ich9_cc_update(lpc);
}
static void ich9_cc_reset(ICH9LPCState *lpc)
{
uint8_t *c = lpc->chip_config;
memset(lpc->chip_config, 0, sizeof(lpc->chip_config));
pci_set_long(c + ICH9_CC_D31IR, ICH9_CC_DIR_DEFAULT);
pci_set_long(c + ICH9_CC_D30IR, ICH9_CC_D30IR_DEFAULT);
pci_set_long(c + ICH9_CC_D29IR, ICH9_CC_DIR_DEFAULT);
pci_set_long(c + ICH9_CC_D28IR, ICH9_CC_DIR_DEFAULT);
pci_set_long(c + ICH9_CC_D27IR, ICH9_CC_DIR_DEFAULT);
pci_set_long(c + ICH9_CC_D26IR, ICH9_CC_DIR_DEFAULT);
pci_set_long(c + ICH9_CC_D25IR, ICH9_CC_DIR_DEFAULT);
pci_set_long(c + ICH9_CC_GCS, ICH9_CC_GCS_DEFAULT);
ich9_cc_update(lpc);
}
static void ich9_cc_addr_len(uint64_t *addr, unsigned *len)
{
*addr &= ICH9_CC_ADDR_MASK;
if (*addr + *len >= ICH9_CC_SIZE) {
*len = ICH9_CC_SIZE - *addr;
}
}
/* val: little endian */
static void ich9_cc_write(void *opaque, hwaddr addr,
uint64_t val, unsigned len)
{
ICH9LPCState *lpc = (ICH9LPCState *)opaque;
trace_ich9_cc_write(addr, val, len);
ich9_cc_addr_len(&addr, &len);
memcpy(lpc->chip_config + addr, &val, len);
pci_bus_fire_intx_routing_notifier(pci_get_bus(&lpc->d));
ich9_cc_update(lpc);
}
/* return value: little endian */
static uint64_t ich9_cc_read(void *opaque, hwaddr addr,
unsigned len)
{
ICH9LPCState *lpc = (ICH9LPCState *)opaque;
uint32_t val = 0;
ich9_cc_addr_len(&addr, &len);
memcpy(&val, lpc->chip_config + addr, len);
trace_ich9_cc_read(addr, val, len);
return val;
}
/* IRQ routing */
/* */
static void ich9_lpc_rout(uint8_t pirq_rout, int *pic_irq, int *pic_dis)
{
*pic_irq = pirq_rout & ICH9_LPC_PIRQ_ROUT_MASK;
*pic_dis = pirq_rout & ICH9_LPC_PIRQ_ROUT_IRQEN;
}
static void ich9_lpc_pic_irq(ICH9LPCState *lpc, int pirq_num,
int *pic_irq, int *pic_dis)
{
switch (pirq_num) {
case 0 ... 3: /* A-D */
ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQA_ROUT + pirq_num],
pic_irq, pic_dis);
return;
case 4 ... 7: /* E-H */
ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQE_ROUT + (pirq_num - 4)],
pic_irq, pic_dis);
return;
default:
break;
}
abort();
}
/* gsi: i8259+ioapic irq 0-15, otherwise assert */
static void ich9_lpc_update_pic(ICH9LPCState *lpc, int gsi)
{
int i, pic_level;
assert(gsi < ICH9_LPC_PIC_NUM_PINS);
/* The pic level is the logical OR of all the PCI irqs mapped to it */
pic_level = 0;
for (i = 0; i < ICH9_LPC_NB_PIRQS; i++) {
int tmp_irq;
int tmp_dis;
ich9_lpc_pic_irq(lpc, i, &tmp_irq, &tmp_dis);
if (!tmp_dis && tmp_irq == gsi) {
pic_level |= pci_bus_get_irq_level(pci_get_bus(&lpc->d), i);
}
}
if (gsi == lpc->sci_gsi) {
pic_level |= lpc->sci_level;
}
qemu_set_irq(lpc->gsi[gsi], pic_level);
}
/* APIC mode: GSIx: PIRQ[A-H] -> GSI 16, ... no pirq shares same APIC pins. */
static int ich9_pirq_to_gsi(int pirq)
{
return pirq + ICH9_LPC_PIC_NUM_PINS;
}
static int ich9_gsi_to_pirq(int gsi)
{
return gsi - ICH9_LPC_PIC_NUM_PINS;
}
/* gsi: ioapic irq 16-23, otherwise assert */
static void ich9_lpc_update_apic(ICH9LPCState *lpc, int gsi)
{
int level = 0;
assert(gsi >= ICH9_LPC_PIC_NUM_PINS);
level |= pci_bus_get_irq_level(pci_get_bus(&lpc->d), ich9_gsi_to_pirq(gsi));
if (gsi == lpc->sci_gsi) {
level |= lpc->sci_level;
}
qemu_set_irq(lpc->gsi[gsi], level);
}
static void ich9_lpc_set_irq(void *opaque, int pirq, int level)
{
ICH9LPCState *lpc = opaque;
int pic_irq, pic_dis;
assert(0 <= pirq);
assert(pirq < ICH9_LPC_NB_PIRQS);
ich9_lpc_update_apic(lpc, ich9_pirq_to_gsi(pirq));
ich9_lpc_pic_irq(lpc, pirq, &pic_irq, &pic_dis);
ich9_lpc_update_pic(lpc, pic_irq);
}
/* return the pirq number (PIRQ[A-H]:0-7) corresponding to
* a given device irq pin.
*/
static int ich9_lpc_map_irq(PCIDevice *pci_dev, int intx)
{
BusState *bus = qdev_get_parent_bus(&pci_dev->qdev);
PCIBus *pci_bus = PCI_BUS(bus);
PCIDevice *lpc_pdev =
pci_bus->devices[PCI_DEVFN(ICH9_LPC_DEV, ICH9_LPC_FUNC)];
ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pdev);
return lpc->irr[PCI_SLOT(pci_dev->devfn)][intx];
}
static PCIINTxRoute ich9_route_intx_pin_to_irq(void *opaque, int pirq_pin)
{
ICH9LPCState *lpc = opaque;
PCIINTxRoute route;
int pic_irq;
int pic_dis;
assert(0 <= pirq_pin);
assert(pirq_pin < ICH9_LPC_NB_PIRQS);
route.mode = PCI_INTX_ENABLED;
ich9_lpc_pic_irq(lpc, pirq_pin, &pic_irq, &pic_dis);
if (!pic_dis) {
if (pic_irq < ICH9_LPC_PIC_NUM_PINS) {
route.irq = pic_irq;
} else {
route.mode = PCI_INTX_DISABLED;
route.irq = -1;
}
} else {
/*
* Strictly speaking, this is wrong. The PIRQ should be routed
* to *both* the I/O APIC and the PIC, on different pins. The
* I/O APIC has a fixed mapping to IRQ16-23, while the PIC is
* routed according to the PIRQx_ROUT configuration. But QEMU
* doesn't (yet) cope with the concept of pin numbers differing
* between PIC and I/O APIC, and neither does the in-kernel KVM
* irqchip support. So we route to the I/O APIC *only* if the
* routing to the PIC is disabled in the PIRQx_ROUT settings.
*
* This seems to work even if we boot a Linux guest with 'noapic'
* to make it use the legacy PIC, and then kexec directly into a
* new kernel which uses the I/O APIC. The new kernel explicitly
* disables the PIRQ routing even though it doesn't need to care.
*/
route.irq = ich9_pirq_to_gsi(pirq_pin);
}
return route;
}
void ich9_generate_smi(void)
{
cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
}
/* Returns -1 on error, IRQ number on success */
static int ich9_lpc_sci_irq(ICH9LPCState *lpc)
{
uint8_t sel = lpc->d.config[ICH9_LPC_ACPI_CTRL] &
ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK;
switch (sel) {
case ICH9_LPC_ACPI_CTRL_9:
return 9;
case ICH9_LPC_ACPI_CTRL_10:
return 10;
case ICH9_LPC_ACPI_CTRL_11:
return 11;
case ICH9_LPC_ACPI_CTRL_20:
return 20;
case ICH9_LPC_ACPI_CTRL_21:
return 21;
default:
/* reserved */
qemu_log_mask(LOG_GUEST_ERROR,
"ICH9 LPC: SCI IRQ SEL #%u is reserved\n", sel);
break;
}
return -1;
}
static void ich9_set_sci(void *opaque, int irq_num, int level)
{
ICH9LPCState *lpc = opaque;
int irq;
assert(irq_num == 0);
level = !!level;
if (level == lpc->sci_level) {
return;
}
lpc->sci_level = level;
irq = lpc->sci_gsi;
if (irq < 0) {
return;
}
if (irq >= ICH9_LPC_PIC_NUM_PINS) {
ich9_lpc_update_apic(lpc, irq);
} else {
ich9_lpc_update_pic(lpc, irq);
}
}
static void smi_features_ok_callback(void *opaque)
{
ICH9LPCState *lpc = opaque;
uint64_t guest_features;
uint64_t guest_cpu_hotplug_features;
if (lpc->smi_features_ok) {
/* negotiation already complete, features locked */
return;
}
memcpy(&guest_features, lpc->smi_guest_features_le, sizeof guest_features);
le64_to_cpus(&guest_features);
if (guest_features & ~lpc->smi_host_features) {
/* guest requests invalid features, leave @features_ok at zero */
return;
}
guest_cpu_hotplug_features = guest_features &
(BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT) |
BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT));
if (!(guest_features & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT)) &&
guest_cpu_hotplug_features) {
/*
* cpu hot-[un]plug with SMI requires SMI broadcast,
* leave @features_ok at zero
*/
return;
}
if (guest_cpu_hotplug_features ==
BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT)) {
/* cpu hot-unplug is unsupported without cpu-hotplug */
return;
}
/* valid feature subset requested, lock it down, report success */
lpc->smi_negotiated_features = guest_features;
lpc->smi_features_ok = 1;
}
static void ich9_lpc_pm_init(ICH9LPCState *lpc)
{
qemu_irq sci_irq;
FWCfgState *fw_cfg = fw_cfg_find();
sci_irq = qemu_allocate_irq(ich9_set_sci, lpc, 0);
ich9_pm_init(PCI_DEVICE(lpc), &lpc->pm, sci_irq);
if (lpc->smi_host_features && fw_cfg) {
uint64_t host_features_le;
host_features_le = cpu_to_le64(lpc->smi_host_features);
memcpy(lpc->smi_host_features_le, &host_features_le,
sizeof host_features_le);
fw_cfg_add_file(fw_cfg, "etc/smi/supported-features",
lpc->smi_host_features_le,
sizeof lpc->smi_host_features_le);
/* The other two guest-visible fields are cleared on device reset, we
* just link them into fw_cfg here.
*/
fw_cfg_add_file_callback(fw_cfg, "etc/smi/requested-features",
NULL, NULL, NULL,
lpc->smi_guest_features_le,
sizeof lpc->smi_guest_features_le,
false);
fw_cfg_add_file_callback(fw_cfg, "etc/smi/features-ok",
smi_features_ok_callback, NULL, lpc,
&lpc->smi_features_ok,
sizeof lpc->smi_features_ok,
true);
}
}
/* APM */
static void ich9_apm_ctrl_changed(uint32_t val, void *arg)
{
ICH9LPCState *lpc = arg;
/* ACPI specs 3.0, 4.7.2.5 */
acpi_pm1_cnt_update(&lpc->pm.acpi_regs,
val == ICH9_APM_ACPI_ENABLE,
val == ICH9_APM_ACPI_DISABLE);
if (val == ICH9_APM_ACPI_ENABLE || val == ICH9_APM_ACPI_DISABLE) {
return;
}
/* SMI_EN = PMBASE + 30. SMI control and enable register */
if (lpc->pm.smi_en & ICH9_PMIO_SMI_EN_APMC_EN) {
if (lpc->smi_negotiated_features &
(UINT64_C(1) << ICH9_LPC_SMI_F_BROADCAST_BIT)) {
CPUState *cs;
CPU_FOREACH(cs) {
cpu_interrupt(cs, CPU_INTERRUPT_SMI);
}
} else {
cpu_interrupt(current_cpu, CPU_INTERRUPT_SMI);
}
}
}
/* config:PMBASE */
static void
ich9_lpc_pmbase_sci_update(ICH9LPCState *lpc)
{
uint32_t pm_io_base = pci_get_long(lpc->d.config + ICH9_LPC_PMBASE);
uint8_t acpi_cntl = pci_get_long(lpc->d.config + ICH9_LPC_ACPI_CTRL);
int new_gsi;
if (acpi_cntl & ICH9_LPC_ACPI_CTRL_ACPI_EN) {
pm_io_base &= ICH9_LPC_PMBASE_BASE_ADDRESS_MASK;
} else {
pm_io_base = 0;
}
ich9_pm_iospace_update(&lpc->pm, pm_io_base);
new_gsi = ich9_lpc_sci_irq(lpc);
if (new_gsi == -1) {
return;
}
if (lpc->sci_level && new_gsi != lpc->sci_gsi) {
qemu_set_irq(lpc->pm.irq, 0);
lpc->sci_gsi = new_gsi;
qemu_set_irq(lpc->pm.irq, 1);
}
lpc->sci_gsi = new_gsi;
}
/* config:RCBA */
static void ich9_lpc_rcba_update(ICH9LPCState *lpc, uint32_t rcba_old)
{
uint32_t rcba = pci_get_long(lpc->d.config + ICH9_LPC_RCBA);
if (rcba_old & ICH9_LPC_RCBA_EN) {
memory_region_del_subregion(get_system_memory(), &lpc->rcrb_mem);
}
if (rcba & ICH9_LPC_RCBA_EN) {
memory_region_add_subregion_overlap(get_system_memory(),
rcba & ICH9_LPC_RCBA_BA_MASK,
&lpc->rcrb_mem, 1);
}
}
/* config:GEN_PMCON* */
static void
ich9_lpc_pmcon_update(ICH9LPCState *lpc)
{
uint16_t gen_pmcon_1 = pci_get_word(lpc->d.config + ICH9_LPC_GEN_PMCON_1);
uint16_t wmask;
if (gen_pmcon_1 & ICH9_LPC_GEN_PMCON_1_SMI_LOCK) {
wmask = pci_get_word(lpc->d.wmask + ICH9_LPC_GEN_PMCON_1);
wmask &= ~ICH9_LPC_GEN_PMCON_1_SMI_LOCK;
pci_set_word(lpc->d.wmask + ICH9_LPC_GEN_PMCON_1, wmask);
lpc->pm.smi_en_wmask &= ~1;
}
}
static int ich9_lpc_post_load(void *opaque, int version_id)
{
ICH9LPCState *lpc = opaque;
ich9_lpc_pmbase_sci_update(lpc);
ich9_lpc_rcba_update(lpc, 0 /* disabled ICH9_LPC_RCBA_EN */);
ich9_lpc_pmcon_update(lpc);
return 0;
}
static void ich9_lpc_config_write(PCIDevice *d,
uint32_t addr, uint32_t val, int len)
{
ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
uint32_t rcba_old = pci_get_long(d->config + ICH9_LPC_RCBA);
pci_default_write_config(d, addr, val, len);
if (ranges_overlap(addr, len, ICH9_LPC_PMBASE, 4) ||
ranges_overlap(addr, len, ICH9_LPC_ACPI_CTRL, 1)) {
ich9_lpc_pmbase_sci_update(lpc);
}
if (ranges_overlap(addr, len, ICH9_LPC_RCBA, 4)) {
ich9_lpc_rcba_update(lpc, rcba_old);
}
if (ranges_overlap(addr, len, ICH9_LPC_PIRQA_ROUT, 4)) {
pci_bus_fire_intx_routing_notifier(pci_get_bus(&lpc->d));
}
if (ranges_overlap(addr, len, ICH9_LPC_PIRQE_ROUT, 4)) {
pci_bus_fire_intx_routing_notifier(pci_get_bus(&lpc->d));
}
if (ranges_overlap(addr, len, ICH9_LPC_GEN_PMCON_1, 8)) {
ich9_lpc_pmcon_update(lpc);
}
}
static void ich9_lpc_reset(DeviceState *qdev)
{
PCIDevice *d = PCI_DEVICE(qdev);
ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
uint32_t rcba_old = pci_get_long(d->config + ICH9_LPC_RCBA);
int i;
for (i = 0; i < 4; i++) {
pci_set_byte(d->config + ICH9_LPC_PIRQA_ROUT + i,
ICH9_LPC_PIRQ_ROUT_DEFAULT);
}
for (i = 0; i < 4; i++) {
pci_set_byte(d->config + ICH9_LPC_PIRQE_ROUT + i,
ICH9_LPC_PIRQ_ROUT_DEFAULT);
}
pci_set_byte(d->config + ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_DEFAULT);
pci_set_long(d->config + ICH9_LPC_PMBASE, ICH9_LPC_PMBASE_DEFAULT);
pci_set_long(d->config + ICH9_LPC_RCBA, ICH9_LPC_RCBA_DEFAULT);
ich9_cc_reset(lpc);
ich9_lpc_pmbase_sci_update(lpc);
ich9_lpc_rcba_update(lpc, rcba_old);
lpc->sci_level = 0;
lpc->rst_cnt = 0;
memset(lpc->smi_guest_features_le, 0, sizeof lpc->smi_guest_features_le);
lpc->smi_features_ok = 0;
lpc->smi_negotiated_features = 0;
}
/* root complex register block is mapped into memory space */
static const MemoryRegionOps rcrb_mmio_ops = {
.read = ich9_cc_read,
.write = ich9_cc_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
{
ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready);
MemoryRegion *io_as = pci_address_space_io(&s->d);
uint8_t *pci_conf;
pci_conf = s->d.config;
if (memory_region_present(io_as, 0x3f8)) {
/* com1 */
pci_conf[0x82] |= 0x01;
}
if (memory_region_present(io_as, 0x2f8)) {
/* com2 */
pci_conf[0x82] |= 0x02;
}
if (memory_region_present(io_as, 0x378)) {
/* lpt */
pci_conf[0x82] |= 0x04;
}
if (memory_region_present(io_as, 0x3f2)) {
/* floppy */
pci_conf[0x82] |= 0x08;
}
}
/* reset control */
static void ich9_rst_cnt_write(void *opaque, hwaddr addr, uint64_t val,
unsigned len)
{
ICH9LPCState *lpc = opaque;
if (val & 4) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
return;
}
lpc->rst_cnt = val & 0xA; /* keep FULL_RST (bit 3) and SYS_RST (bit 1) */
}
static uint64_t ich9_rst_cnt_read(void *opaque, hwaddr addr, unsigned len)
{
ICH9LPCState *lpc = opaque;
return lpc->rst_cnt;
}
static const MemoryRegionOps ich9_rst_cnt_ops = {
.read = ich9_rst_cnt_read,
.write = ich9_rst_cnt_write,
.endianness = DEVICE_LITTLE_ENDIAN
};
static void ich9_lpc_initfn(Object *obj)
{
ICH9LPCState *lpc = ICH9_LPC_DEVICE(obj);
static const uint8_t acpi_enable_cmd = ICH9_APM_ACPI_ENABLE;
static const uint8_t acpi_disable_cmd = ICH9_APM_ACPI_DISABLE;
object_initialize_child(obj, "rtc", &lpc->rtc, TYPE_MC146818_RTC);
qdev_init_gpio_out_named(DEVICE(lpc), lpc->gsi, ICH9_GPIO_GSI,
IOAPIC_NUM_PINS);
object_property_add_uint8_ptr(obj, ACPI_PM_PROP_SCI_INT,
&lpc->sci_gsi, OBJ_PROP_FLAG_READ);
object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_ENABLE_CMD,
&acpi_enable_cmd, OBJ_PROP_FLAG_READ);
object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
&acpi_disable_cmd, OBJ_PROP_FLAG_READ);
object_property_add_uint64_ptr(obj, ICH9_LPC_SMI_NEGOTIATED_FEAT_PROP,
&lpc->smi_negotiated_features,
OBJ_PROP_FLAG_READ);
ich9_pm_add_properties(obj, &lpc->pm);
}
static void ich9_lpc_realize(PCIDevice *d, Error **errp)
{
ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
PCIBus *pci_bus = pci_get_bus(d);
ISABus *isa_bus;
if ((lpc->smi_host_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT)) &&
!(lpc->smi_host_features & BIT_ULL(ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT))) {
/*
* smi_features_ok_callback() throws an error on this.
*
* So bail out here instead of advertizing the invalid
* configuration and get obscure firmware failures from that.
*/
error_setg(errp, "cpu hot-unplug requires cpu hot-plug");
return;
}
isa_bus = isa_bus_new(DEVICE(d), get_system_memory(), get_system_io(),
errp);
if (!isa_bus) {
return;
}
pci_set_long(d->wmask + ICH9_LPC_PMBASE,
ICH9_LPC_PMBASE_BASE_ADDRESS_MASK);
pci_set_byte(d->wmask + ICH9_LPC_PMBASE,
ICH9_LPC_ACPI_CTRL_ACPI_EN |
ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK);
memory_region_init_io(&lpc->rcrb_mem, OBJECT(d), &rcrb_mmio_ops, lpc,
"lpc-rcrb-mmio", ICH9_CC_SIZE);
ich9_cc_init(lpc);
apm_init(d, &lpc->apm, ich9_apm_ctrl_changed, lpc);
lpc->machine_ready.notify = ich9_lpc_machine_ready;
qemu_add_machine_init_done_notifier(&lpc->machine_ready);
memory_region_init_io(&lpc->rst_cnt_mem, OBJECT(d), &ich9_rst_cnt_ops, lpc,
"lpc-reset-control", 1);
memory_region_add_subregion_overlap(pci_address_space_io(d),
ICH9_RST_CNT_IOPORT, &lpc->rst_cnt_mem,
1);
isa_bus_register_input_irqs(isa_bus, lpc->gsi);
i8257_dma_init(isa_bus, 0);
/* RTC */
qdev_prop_set_int32(DEVICE(&lpc->rtc), "base_year", 2000);
if (!qdev_realize(DEVICE(&lpc->rtc), BUS(isa_bus), errp)) {
return;
}
pci_bus_irqs(pci_bus, ich9_lpc_set_irq, d, ICH9_LPC_NB_PIRQS);
pci_bus_map_irqs(pci_bus, ich9_lpc_map_irq);
pci_bus_set_route_irq_fn(pci_bus, ich9_route_intx_pin_to_irq);
ich9_lpc_pm_init(lpc);
}
static bool ich9_rst_cnt_needed(void *opaque)
{
ICH9LPCState *lpc = opaque;
return (lpc->rst_cnt != 0);
}
static const VMStateDescription vmstate_ich9_rst_cnt = {
.name = "ICH9LPC/rst_cnt",
.version_id = 1,
.minimum_version_id = 1,
.needed = ich9_rst_cnt_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT8(rst_cnt, ICH9LPCState),
VMSTATE_END_OF_LIST()
}
};
static bool ich9_smi_feat_needed(void *opaque)
{
ICH9LPCState *lpc = opaque;
return !buffer_is_zero(lpc->smi_guest_features_le,
sizeof lpc->smi_guest_features_le) ||
lpc->smi_features_ok;
}
static const VMStateDescription vmstate_ich9_smi_feat = {
.name = "ICH9LPC/smi_feat",
.version_id = 1,
.minimum_version_id = 1,
.needed = ich9_smi_feat_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(smi_guest_features_le, ICH9LPCState,
sizeof(uint64_t)),
VMSTATE_UINT8(smi_features_ok, ICH9LPCState),
VMSTATE_UINT64(smi_negotiated_features, ICH9LPCState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_ich9_lpc = {
.name = "ICH9LPC",
.version_id = 1,
.minimum_version_id = 1,
.post_load = ich9_lpc_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(d, ICH9LPCState),
VMSTATE_STRUCT(apm, ICH9LPCState, 0, vmstate_apm, APMState),
VMSTATE_STRUCT(pm, ICH9LPCState, 0, vmstate_ich9_pm, ICH9LPCPMRegs),
VMSTATE_UINT8_ARRAY(chip_config, ICH9LPCState, ICH9_CC_SIZE),
VMSTATE_UINT32(sci_level, ICH9LPCState),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription*[]) {
&vmstate_ich9_rst_cnt,
&vmstate_ich9_smi_feat,
NULL
}
};
static Property ich9_lpc_properties[] = {
DEFINE_PROP_BOOL("noreboot", ICH9LPCState, pin_strap.spkr_hi, false),
DEFINE_PROP_BOOL("smm-compat", ICH9LPCState, pm.smm_compat, false),
DEFINE_PROP_BOOL("smm-enabled", ICH9LPCState, pm.smm_enabled, false),
DEFINE_PROP_BIT64("x-smi-broadcast", ICH9LPCState, smi_host_features,
ICH9_LPC_SMI_F_BROADCAST_BIT, true),
DEFINE_PROP_BIT64("x-smi-cpu-hotplug", ICH9LPCState, smi_host_features,
ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, true),
DEFINE_PROP_BIT64("x-smi-cpu-hotunplug", ICH9LPCState, smi_host_features,
ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
static void ich9_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
{
ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
acpi_send_gpe_event(&s->pm.acpi_regs, s->pm.irq, ev);
}
static void build_ich9_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
{
Aml *field;
BusState *bus = qdev_get_child_bus(DEVICE(adev), "isa.0");
Aml *sb_scope = aml_scope("\\_SB");
/* ICH9 PCI to ISA irq remapping */
aml_append(scope, aml_operation_region("PIRQ", AML_PCI_CONFIG,
aml_int(0x60), 0x0C));
/* Fields declarion has to happen *after* operation region */
field = aml_field("PCI0.SF8.PIRQ", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
aml_append(field, aml_named_field("PRQA", 8));
aml_append(field, aml_named_field("PRQB", 8));
aml_append(field, aml_named_field("PRQC", 8));
aml_append(field, aml_named_field("PRQD", 8));
aml_append(field, aml_reserved_field(0x20));
aml_append(field, aml_named_field("PRQE", 8));
aml_append(field, aml_named_field("PRQF", 8));
aml_append(field, aml_named_field("PRQG", 8));
aml_append(field, aml_named_field("PRQH", 8));
aml_append(sb_scope, field);
aml_append(scope, sb_scope);
qbus_build_aml(bus, scope);
}
static void ich9_lpc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(klass);
AcpiDevAmlIfClass *amldevc = ACPI_DEV_AML_IF_CLASS(klass);
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->reset = ich9_lpc_reset;
k->realize = ich9_lpc_realize;
dc->vmsd = &vmstate_ich9_lpc;
device_class_set_props(dc, ich9_lpc_properties);
k->config_write = ich9_lpc_config_write;
dc->desc = "ICH9 LPC bridge";
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_ICH9_8;
k->revision = ICH9_A2_LPC_REVISION;
k->class_id = PCI_CLASS_BRIDGE_ISA;
/*
* Reason: part of ICH9 southbridge, needs to be wired up by
* pc_q35_init()
*/
dc->user_creatable = false;
hc->pre_plug = ich9_pm_device_pre_plug_cb;
hc->plug = ich9_pm_device_plug_cb;
hc->unplug_request = ich9_pm_device_unplug_request_cb;
hc->unplug = ich9_pm_device_unplug_cb;
hc->is_hotpluggable_bus = ich9_pm_is_hotpluggable_bus;
adevc->ospm_status = ich9_pm_ospm_status;
adevc->send_event = ich9_send_gpe;
amldevc->build_dev_aml = build_ich9_isa_aml;
}
static const TypeInfo ich9_lpc_info = {
.name = TYPE_ICH9_LPC_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(ICH9LPCState),
.instance_init = ich9_lpc_initfn,
.class_init = ich9_lpc_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_HOTPLUG_HANDLER },
{ TYPE_ACPI_DEVICE_IF },
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
{ TYPE_ACPI_DEV_AML_IF },
{ }
}
};
static void ich9_lpc_register(void)
{
type_register_static(&ich9_lpc_info);
}
type_init(ich9_lpc_register);
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