646 lines
18 KiB
C
646 lines
18 KiB
C
/*
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* ACPI implementation
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "hw.h"
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#include "pc.h"
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#include "apm.h"
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#include "pm_smbus.h"
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#include "pci/pci.h"
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#include "acpi.h"
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#include "sysemu/sysemu.h"
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#include "qemu/range.h"
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#include "exec/ioport.h"
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#include "fw_cfg.h"
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#include "exec/address-spaces.h"
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//#define DEBUG
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#ifdef DEBUG
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# define PIIX4_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
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#else
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# define PIIX4_DPRINTF(format, ...) do { } while (0)
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#endif
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#define GPE_BASE 0xafe0
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#define GPE_LEN 4
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#define PCI_HOTPLUG_ADDR 0xae00
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#define PCI_HOTPLUG_SIZE 0x000f
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#define PCI_UP_BASE 0xae00
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#define PCI_DOWN_BASE 0xae04
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#define PCI_EJ_BASE 0xae08
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#define PCI_RMV_BASE 0xae0c
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#define PIIX4_PCI_HOTPLUG_STATUS 2
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struct pci_status {
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uint32_t up; /* deprecated, maintained for migration compatibility */
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uint32_t down;
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};
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typedef struct PIIX4PMState {
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PCIDevice dev;
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MemoryRegion io;
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MemoryRegion io_gpe;
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MemoryRegion io_pci;
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ACPIREGS ar;
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APMState apm;
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PMSMBus smb;
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uint32_t smb_io_base;
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qemu_irq irq;
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qemu_irq smi_irq;
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int kvm_enabled;
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Notifier machine_ready;
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Notifier powerdown_notifier;
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/* for pci hotplug */
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struct pci_status pci0_status;
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uint32_t pci0_hotplug_enable;
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uint32_t pci0_slot_device_present;
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uint8_t disable_s3;
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uint8_t disable_s4;
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uint8_t s4_val;
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} PIIX4PMState;
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static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
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#define ACPI_ENABLE 0xf1
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#define ACPI_DISABLE 0xf0
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static void pm_update_sci(PIIX4PMState *s)
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{
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int sci_level, pmsts;
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pmsts = acpi_pm1_evt_get_sts(&s->ar);
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sci_level = (((pmsts & s->ar.pm1.evt.en) &
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(ACPI_BITMASK_RT_CLOCK_ENABLE |
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ACPI_BITMASK_POWER_BUTTON_ENABLE |
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ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
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ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
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(((s->ar.gpe.sts[0] & s->ar.gpe.en[0])
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& PIIX4_PCI_HOTPLUG_STATUS) != 0);
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qemu_set_irq(s->irq, sci_level);
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/* schedule a timer interruption if needed */
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acpi_pm_tmr_update(&s->ar, (s->ar.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
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!(pmsts & ACPI_BITMASK_TIMER_STATUS));
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}
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static void pm_tmr_timer(ACPIREGS *ar)
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{
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PIIX4PMState *s = container_of(ar, PIIX4PMState, ar);
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pm_update_sci(s);
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}
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static void apm_ctrl_changed(uint32_t val, void *arg)
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{
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PIIX4PMState *s = arg;
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/* ACPI specs 3.0, 4.7.2.5 */
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acpi_pm1_cnt_update(&s->ar, val == ACPI_ENABLE, val == ACPI_DISABLE);
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if (s->dev.config[0x5b] & (1 << 1)) {
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if (s->smi_irq) {
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qemu_irq_raise(s->smi_irq);
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}
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}
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}
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static void pm_io_space_update(PIIX4PMState *s)
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{
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uint32_t pm_io_base;
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pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
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pm_io_base &= 0xffc0;
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memory_region_transaction_begin();
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memory_region_set_enabled(&s->io, s->dev.config[0x80] & 1);
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memory_region_set_address(&s->io, pm_io_base);
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memory_region_transaction_commit();
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}
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static void smbus_io_space_update(PIIX4PMState *s)
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{
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s->smb_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x90));
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s->smb_io_base &= 0xffc0;
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memory_region_transaction_begin();
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memory_region_set_enabled(&s->smb.io, s->dev.config[0xd2] & 1);
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memory_region_set_address(&s->smb.io, s->smb_io_base);
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memory_region_transaction_commit();
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}
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static void pm_write_config(PCIDevice *d,
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uint32_t address, uint32_t val, int len)
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{
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pci_default_write_config(d, address, val, len);
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if (range_covers_byte(address, len, 0x80) ||
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ranges_overlap(address, len, 0x40, 4)) {
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pm_io_space_update((PIIX4PMState *)d);
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}
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if (range_covers_byte(address, len, 0xd2) ||
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ranges_overlap(address, len, 0x90, 4)) {
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smbus_io_space_update((PIIX4PMState *)d);
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}
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}
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static void vmstate_pci_status_pre_save(void *opaque)
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{
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struct pci_status *pci0_status = opaque;
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PIIX4PMState *s = container_of(pci0_status, PIIX4PMState, pci0_status);
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/* We no longer track up, so build a safe value for migrating
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* to a version that still does... of course these might get lost
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* by an old buggy implementation, but we try. */
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pci0_status->up = s->pci0_slot_device_present & s->pci0_hotplug_enable;
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}
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static int vmstate_acpi_post_load(void *opaque, int version_id)
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{
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PIIX4PMState *s = opaque;
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pm_io_space_update(s);
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return 0;
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}
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#define VMSTATE_GPE_ARRAY(_field, _state) \
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{ \
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.name = (stringify(_field)), \
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.version_id = 0, \
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.info = &vmstate_info_uint16, \
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.size = sizeof(uint16_t), \
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.flags = VMS_SINGLE | VMS_POINTER, \
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.offset = vmstate_offset_pointer(_state, _field, uint8_t), \
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}
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static const VMStateDescription vmstate_gpe = {
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.name = "gpe",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField []) {
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VMSTATE_GPE_ARRAY(sts, ACPIGPE),
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VMSTATE_GPE_ARRAY(en, ACPIGPE),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_pci_status = {
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.name = "pci_status",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.pre_save = vmstate_pci_status_pre_save,
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.fields = (VMStateField []) {
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VMSTATE_UINT32(up, struct pci_status),
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VMSTATE_UINT32(down, struct pci_status),
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VMSTATE_END_OF_LIST()
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}
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};
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static int acpi_load_old(QEMUFile *f, void *opaque, int version_id)
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{
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PIIX4PMState *s = opaque;
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int ret, i;
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uint16_t temp;
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ret = pci_device_load(&s->dev, f);
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if (ret < 0) {
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return ret;
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}
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qemu_get_be16s(f, &s->ar.pm1.evt.sts);
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qemu_get_be16s(f, &s->ar.pm1.evt.en);
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qemu_get_be16s(f, &s->ar.pm1.cnt.cnt);
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ret = vmstate_load_state(f, &vmstate_apm, opaque, 1);
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if (ret) {
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return ret;
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}
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qemu_get_timer(f, s->ar.tmr.timer);
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qemu_get_sbe64s(f, &s->ar.tmr.overflow_time);
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qemu_get_be16s(f, (uint16_t *)s->ar.gpe.sts);
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for (i = 0; i < 3; i++) {
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qemu_get_be16s(f, &temp);
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}
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qemu_get_be16s(f, (uint16_t *)s->ar.gpe.en);
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for (i = 0; i < 3; i++) {
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qemu_get_be16s(f, &temp);
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}
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ret = vmstate_load_state(f, &vmstate_pci_status, opaque, 1);
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return ret;
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}
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/* qemu-kvm 1.2 uses version 3 but advertised as 2
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* To support incoming qemu-kvm 1.2 migration, change version_id
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* and minimum_version_id to 2 below (which breaks migration from
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* qemu 1.2).
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*
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*/
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static const VMStateDescription vmstate_acpi = {
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.name = "piix4_pm",
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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 = acpi_load_old,
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.post_load = vmstate_acpi_post_load,
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.fields = (VMStateField []) {
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VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
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VMSTATE_UINT16(ar.pm1.evt.sts, PIIX4PMState),
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VMSTATE_UINT16(ar.pm1.evt.en, PIIX4PMState),
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VMSTATE_UINT16(ar.pm1.cnt.cnt, PIIX4PMState),
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VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
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VMSTATE_TIMER(ar.tmr.timer, PIIX4PMState),
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VMSTATE_INT64(ar.tmr.overflow_time, PIIX4PMState),
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VMSTATE_STRUCT(ar.gpe, PIIX4PMState, 2, vmstate_gpe, ACPIGPE),
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VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
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struct pci_status),
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VMSTATE_END_OF_LIST()
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}
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};
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static void acpi_piix_eject_slot(PIIX4PMState *s, unsigned slots)
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{
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BusChild *kid, *next;
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BusState *bus = qdev_get_parent_bus(&s->dev.qdev);
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int slot = ffs(slots) - 1;
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bool slot_free = true;
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/* Mark request as complete */
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s->pci0_status.down &= ~(1U << slot);
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QTAILQ_FOREACH_SAFE(kid, &bus->children, sibling, next) {
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DeviceState *qdev = kid->child;
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PCIDevice *dev = PCI_DEVICE(qdev);
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PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
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if (PCI_SLOT(dev->devfn) == slot) {
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if (pc->no_hotplug) {
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slot_free = false;
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} else {
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qdev_free(qdev);
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}
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}
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}
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if (slot_free) {
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s->pci0_slot_device_present &= ~(1U << slot);
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}
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}
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static void piix4_update_hotplug(PIIX4PMState *s)
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{
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PCIDevice *dev = &s->dev;
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BusState *bus = qdev_get_parent_bus(&dev->qdev);
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BusChild *kid, *next;
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/* Execute any pending removes during reset */
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while (s->pci0_status.down) {
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acpi_piix_eject_slot(s, s->pci0_status.down);
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}
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s->pci0_hotplug_enable = ~0;
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s->pci0_slot_device_present = 0;
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QTAILQ_FOREACH_SAFE(kid, &bus->children, sibling, next) {
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DeviceState *qdev = kid->child;
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PCIDevice *pdev = PCI_DEVICE(qdev);
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PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pdev);
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int slot = PCI_SLOT(pdev->devfn);
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if (pc->no_hotplug) {
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s->pci0_hotplug_enable &= ~(1U << slot);
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}
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s->pci0_slot_device_present |= (1U << slot);
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}
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}
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static void piix4_reset(void *opaque)
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{
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PIIX4PMState *s = opaque;
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uint8_t *pci_conf = s->dev.config;
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pci_conf[0x58] = 0;
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pci_conf[0x59] = 0;
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pci_conf[0x5a] = 0;
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pci_conf[0x5b] = 0;
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pci_conf[0x40] = 0x01; /* PM io base read only bit */
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pci_conf[0x80] = 0;
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if (s->kvm_enabled) {
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/* Mark SMM as already inited (until KVM supports SMM). */
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pci_conf[0x5B] = 0x02;
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}
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piix4_update_hotplug(s);
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}
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static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
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{
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PIIX4PMState *s = container_of(n, PIIX4PMState, powerdown_notifier);
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assert(s != NULL);
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acpi_pm1_evt_power_down(&s->ar);
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}
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static void piix4_pm_machine_ready(Notifier *n, void *opaque)
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{
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PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
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uint8_t *pci_conf;
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pci_conf = s->dev.config;
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pci_conf[0x5f] = (isa_is_ioport_assigned(0x378) ? 0x80 : 0) | 0x10;
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pci_conf[0x63] = 0x60;
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pci_conf[0x67] = (isa_is_ioport_assigned(0x3f8) ? 0x08 : 0) |
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(isa_is_ioport_assigned(0x2f8) ? 0x90 : 0);
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}
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static int piix4_pm_initfn(PCIDevice *dev)
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{
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PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
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uint8_t *pci_conf;
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pci_conf = s->dev.config;
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pci_conf[0x06] = 0x80;
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pci_conf[0x07] = 0x02;
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pci_conf[0x09] = 0x00;
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pci_conf[0x3d] = 0x01; // interrupt pin 1
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/* APM */
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apm_init(dev, &s->apm, apm_ctrl_changed, s);
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if (s->kvm_enabled) {
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/* Mark SMM as already inited to prevent SMM from running. KVM does not
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* support SMM mode. */
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pci_conf[0x5B] = 0x02;
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}
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/* XXX: which specification is used ? The i82731AB has different
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mappings */
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pci_conf[0x90] = s->smb_io_base | 1;
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pci_conf[0x91] = s->smb_io_base >> 8;
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pci_conf[0xd2] = 0x09;
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pm_smbus_init(&s->dev.qdev, &s->smb);
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memory_region_set_enabled(&s->smb.io, pci_conf[0xd2] & 1);
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memory_region_add_subregion(get_system_io(), s->smb_io_base, &s->smb.io);
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memory_region_init(&s->io, "piix4-pm", 64);
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memory_region_set_enabled(&s->io, false);
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memory_region_add_subregion(get_system_io(), 0, &s->io);
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acpi_pm_tmr_init(&s->ar, pm_tmr_timer, &s->io);
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acpi_pm1_evt_init(&s->ar, pm_tmr_timer, &s->io);
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acpi_pm1_cnt_init(&s->ar, &s->io);
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acpi_gpe_init(&s->ar, GPE_LEN);
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s->powerdown_notifier.notify = piix4_pm_powerdown_req;
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qemu_register_powerdown_notifier(&s->powerdown_notifier);
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s->machine_ready.notify = piix4_pm_machine_ready;
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qemu_add_machine_init_done_notifier(&s->machine_ready);
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qemu_register_reset(piix4_reset, s);
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piix4_acpi_system_hot_add_init(dev->bus, s);
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return 0;
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}
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i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
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qemu_irq sci_irq, qemu_irq smi_irq,
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int kvm_enabled, void *fw_cfg)
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{
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PCIDevice *dev;
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PIIX4PMState *s;
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dev = pci_create(bus, devfn, "PIIX4_PM");
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qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
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s = DO_UPCAST(PIIX4PMState, dev, dev);
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s->irq = sci_irq;
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s->smi_irq = smi_irq;
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s->kvm_enabled = kvm_enabled;
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qdev_init_nofail(&dev->qdev);
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if (fw_cfg) {
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uint8_t suspend[6] = {128, 0, 0, 129, 128, 128};
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suspend[3] = 1 | ((!s->disable_s3) << 7);
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suspend[4] = s->s4_val | ((!s->disable_s4) << 7);
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fw_cfg_add_file(fw_cfg, "etc/system-states", g_memdup(suspend, 6), 6);
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}
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return s->smb.smbus;
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}
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static Property piix4_pm_properties[] = {
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DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
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DEFINE_PROP_UINT8("disable_s3", PIIX4PMState, disable_s3, 0),
|
|
DEFINE_PROP_UINT8("disable_s4", PIIX4PMState, disable_s4, 0),
|
|
DEFINE_PROP_UINT8("s4_val", PIIX4PMState, s4_val, 2),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void piix4_pm_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->no_hotplug = 1;
|
|
k->init = piix4_pm_initfn;
|
|
k->config_write = pm_write_config;
|
|
k->vendor_id = PCI_VENDOR_ID_INTEL;
|
|
k->device_id = PCI_DEVICE_ID_INTEL_82371AB_3;
|
|
k->revision = 0x03;
|
|
k->class_id = PCI_CLASS_BRIDGE_OTHER;
|
|
dc->desc = "PM";
|
|
dc->no_user = 1;
|
|
dc->vmsd = &vmstate_acpi;
|
|
dc->props = piix4_pm_properties;
|
|
}
|
|
|
|
static TypeInfo piix4_pm_info = {
|
|
.name = "PIIX4_PM",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(PIIX4PMState),
|
|
.class_init = piix4_pm_class_init,
|
|
};
|
|
|
|
static void piix4_pm_register_types(void)
|
|
{
|
|
type_register_static(&piix4_pm_info);
|
|
}
|
|
|
|
type_init(piix4_pm_register_types)
|
|
|
|
static uint64_t gpe_readb(void *opaque, hwaddr addr, unsigned width)
|
|
{
|
|
PIIX4PMState *s = opaque;
|
|
uint32_t val = acpi_gpe_ioport_readb(&s->ar, addr);
|
|
|
|
PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
|
|
return val;
|
|
}
|
|
|
|
static void gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned width)
|
|
{
|
|
PIIX4PMState *s = opaque;
|
|
|
|
acpi_gpe_ioport_writeb(&s->ar, addr, val);
|
|
pm_update_sci(s);
|
|
|
|
PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
|
|
}
|
|
|
|
static const MemoryRegionOps piix4_gpe_ops = {
|
|
.read = gpe_readb,
|
|
.write = gpe_writeb,
|
|
.valid.min_access_size = 1,
|
|
.valid.max_access_size = 4,
|
|
.impl.min_access_size = 1,
|
|
.impl.max_access_size = 1,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static uint32_t pci_up_read(void *opaque, uint32_t addr)
|
|
{
|
|
PIIX4PMState *s = opaque;
|
|
uint32_t val;
|
|
|
|
/* Manufacture an "up" value to cause a device check on any hotplug
|
|
* slot with a device. Extra device checks are harmless. */
|
|
val = s->pci0_slot_device_present & s->pci0_hotplug_enable;
|
|
|
|
PIIX4_DPRINTF("pci_up_read %x\n", val);
|
|
return val;
|
|
}
|
|
|
|
static uint32_t pci_down_read(void *opaque, uint32_t addr)
|
|
{
|
|
PIIX4PMState *s = opaque;
|
|
uint32_t val = s->pci0_status.down;
|
|
|
|
PIIX4_DPRINTF("pci_down_read %x\n", val);
|
|
return val;
|
|
}
|
|
|
|
static uint32_t pci_features_read(void *opaque, uint32_t addr)
|
|
{
|
|
/* No feature defined yet */
|
|
PIIX4_DPRINTF("pci_features_read %x\n", 0);
|
|
return 0;
|
|
}
|
|
|
|
static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
|
|
{
|
|
acpi_piix_eject_slot(opaque, val);
|
|
|
|
PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
|
|
}
|
|
|
|
static uint32_t pcirmv_read(void *opaque, uint32_t addr)
|
|
{
|
|
PIIX4PMState *s = opaque;
|
|
|
|
return s->pci0_hotplug_enable;
|
|
}
|
|
|
|
static const MemoryRegionOps piix4_pci_ops = {
|
|
.old_portio = (MemoryRegionPortio[]) {
|
|
{
|
|
.offset = PCI_UP_BASE - PCI_HOTPLUG_ADDR, .len = 4, .size = 4,
|
|
.read = pci_up_read,
|
|
},{
|
|
.offset = PCI_DOWN_BASE - PCI_HOTPLUG_ADDR, .len = 4, .size = 4,
|
|
.read = pci_down_read,
|
|
},{
|
|
.offset = PCI_EJ_BASE - PCI_HOTPLUG_ADDR, .len = 4, .size = 4,
|
|
.read = pci_features_read,
|
|
.write = pciej_write,
|
|
},{
|
|
.offset = PCI_RMV_BASE - PCI_HOTPLUG_ADDR, .len = 4, .size = 4,
|
|
.read = pcirmv_read,
|
|
},
|
|
PORTIO_END_OF_LIST()
|
|
},
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
|
|
PCIHotplugState state);
|
|
|
|
static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
|
|
{
|
|
memory_region_init_io(&s->io_gpe, &piix4_gpe_ops, s, "apci-gpe0",
|
|
GPE_LEN);
|
|
memory_region_add_subregion(get_system_io(), GPE_BASE, &s->io_gpe);
|
|
|
|
memory_region_init_io(&s->io_pci, &piix4_pci_ops, s, "apci-pci-hotplug",
|
|
PCI_HOTPLUG_SIZE);
|
|
memory_region_add_subregion(get_system_io(), PCI_HOTPLUG_ADDR,
|
|
&s->io_pci);
|
|
pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
|
|
}
|
|
|
|
static void enable_device(PIIX4PMState *s, int slot)
|
|
{
|
|
s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
|
|
s->pci0_slot_device_present |= (1U << slot);
|
|
}
|
|
|
|
static void disable_device(PIIX4PMState *s, int slot)
|
|
{
|
|
s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
|
|
s->pci0_status.down |= (1U << slot);
|
|
}
|
|
|
|
static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
|
|
PCIHotplugState state)
|
|
{
|
|
int slot = PCI_SLOT(dev->devfn);
|
|
PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
|
|
PCI_DEVICE(qdev));
|
|
|
|
/* Don't send event when device is enabled during qemu machine creation:
|
|
* it is present on boot, no hotplug event is necessary. We do send an
|
|
* event when the device is disabled later. */
|
|
if (state == PCI_COLDPLUG_ENABLED) {
|
|
s->pci0_slot_device_present |= (1U << slot);
|
|
return 0;
|
|
}
|
|
|
|
if (state == PCI_HOTPLUG_ENABLED) {
|
|
enable_device(s, slot);
|
|
} else {
|
|
disable_device(s, slot);
|
|
}
|
|
|
|
pm_update_sci(s);
|
|
|
|
return 0;
|
|
}
|