4 * Copyright (c) 2006 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License version 2 as published by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, see <http://www.gnu.org/licenses/>
30 # define PIIX4_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
32 # define PIIX4_DPRINTF(format, ...) do { } while (0)
35 #define ACPI_DBG_IO_ADDR 0xb044
37 #define GPE_BASE 0xafe0
38 #define PCI_BASE 0xae00
39 #define PCI_EJ_BASE 0xae08
41 #define PIIX4_PCI_HOTPLUG_STATUS 2
44 uint16_t sts; /* status */
45 uint16_t en; /* enabled */
53 typedef struct PIIX4PMState {
63 int64_t tmr_overflow_time;
75 struct pci_status pci0_status;
78 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
80 #define ACPI_ENABLE 0xf1
81 #define ACPI_DISABLE 0xf0
83 static uint32_t get_pmtmr(PIIX4PMState *s)
86 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY, get_ticks_per_sec());
90 static int get_pmsts(PIIX4PMState *s)
94 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
96 if (d >= s->tmr_overflow_time)
97 s->pmsts |= ACPI_BITMASK_TIMER_STATUS;
101 static void pm_update_sci(PIIX4PMState *s)
103 int sci_level, pmsts;
106 pmsts = get_pmsts(s);
107 sci_level = (((pmsts & s->pmen) &
108 (ACPI_BITMASK_RT_CLOCK_ENABLE |
109 ACPI_BITMASK_POWER_BUTTON_ENABLE |
110 ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
111 ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
112 (((s->gpe.sts & s->gpe.en) & PIIX4_PCI_HOTPLUG_STATUS) != 0);
114 qemu_set_irq(s->irq, sci_level);
115 /* schedule a timer interruption if needed */
116 if ((s->pmen & ACPI_BITMASK_TIMER_ENABLE) &&
117 !(pmsts & ACPI_BITMASK_TIMER_STATUS)) {
118 expire_time = muldiv64(s->tmr_overflow_time, get_ticks_per_sec(),
120 qemu_mod_timer(s->tmr_timer, expire_time);
122 qemu_del_timer(s->tmr_timer);
126 static void pm_tmr_timer(void *opaque)
128 PIIX4PMState *s = opaque;
132 static void pm_ioport_write(IORange *ioport, uint64_t addr, unsigned width,
135 PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport);
138 PIIX4_DPRINTF("PM write port=0x%04x width=%d val=0x%08x\n",
139 (unsigned)addr, width, (unsigned)val);
147 pmsts = get_pmsts(s);
148 if (pmsts & val & ACPI_BITMASK_TIMER_STATUS) {
149 /* if TMRSTS is reset, then compute the new overflow time */
150 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
151 get_ticks_per_sec());
152 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
165 s->pmcntrl = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
166 if (val & ACPI_BITMASK_SLEEP_ENABLE) {
167 /* change suspend type */
168 sus_typ = (val >> 10) & 7;
170 case 0: /* soft power off */
171 qemu_system_shutdown_request();
174 /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
175 Pretend that resume was caused by power button */
176 s->pmsts |= (ACPI_BITMASK_WAKE_STATUS |
177 ACPI_BITMASK_POWER_BUTTON_STATUS);
178 qemu_system_reset_request();
180 qemu_irq_raise(s->cmos_s3);
191 PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", addr, val);
194 static void pm_ioport_read(IORange *ioport, uint64_t addr, unsigned width,
197 PIIX4PMState *s = container_of(ioport, PIIX4PMState, ioport);
217 PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", addr, val);
221 static const IORangeOps pm_iorange_ops = {
222 .read = pm_ioport_read,
223 .write = pm_ioport_write,
226 static void apm_ctrl_changed(uint32_t val, void *arg)
228 PIIX4PMState *s = arg;
230 /* ACPI specs 3.0, 4.7.2.5 */
231 if (val == ACPI_ENABLE) {
232 s->pmcntrl |= ACPI_BITMASK_SCI_ENABLE;
233 } else if (val == ACPI_DISABLE) {
234 s->pmcntrl &= ~ACPI_BITMASK_SCI_ENABLE;
237 if (s->dev.config[0x5b] & (1 << 1)) {
239 qemu_irq_raise(s->smi_irq);
244 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
246 PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val);
249 static void pm_io_space_update(PIIX4PMState *s)
253 if (s->dev.config[0x80] & 1) {
254 pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
255 pm_io_base &= 0xffc0;
257 /* XXX: need to improve memory and ioport allocation */
258 PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base);
259 iorange_init(&s->ioport, &pm_iorange_ops, pm_io_base, 64);
260 ioport_register(&s->ioport);
264 static void pm_write_config(PCIDevice *d,
265 uint32_t address, uint32_t val, int len)
267 pci_default_write_config(d, address, val, len);
268 if (range_covers_byte(address, len, 0x80))
269 pm_io_space_update((PIIX4PMState *)d);
272 static int vmstate_acpi_post_load(void *opaque, int version_id)
274 PIIX4PMState *s = opaque;
276 pm_io_space_update(s);
280 static const VMStateDescription vmstate_gpe = {
283 .minimum_version_id = 1,
284 .minimum_version_id_old = 1,
285 .fields = (VMStateField []) {
286 VMSTATE_UINT16(sts, struct gpe_regs),
287 VMSTATE_UINT16(en, struct gpe_regs),
288 VMSTATE_END_OF_LIST()
292 static const VMStateDescription vmstate_pci_status = {
293 .name = "pci_status",
295 .minimum_version_id = 1,
296 .minimum_version_id_old = 1,
297 .fields = (VMStateField []) {
298 VMSTATE_UINT32(up, struct pci_status),
299 VMSTATE_UINT32(down, struct pci_status),
300 VMSTATE_END_OF_LIST()
304 static const VMStateDescription vmstate_acpi = {
307 .minimum_version_id = 1,
308 .minimum_version_id_old = 1,
309 .post_load = vmstate_acpi_post_load,
310 .fields = (VMStateField []) {
311 VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
312 VMSTATE_UINT16(pmsts, PIIX4PMState),
313 VMSTATE_UINT16(pmen, PIIX4PMState),
314 VMSTATE_UINT16(pmcntrl, PIIX4PMState),
315 VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
316 VMSTATE_TIMER(tmr_timer, PIIX4PMState),
317 VMSTATE_INT64(tmr_overflow_time, PIIX4PMState),
318 VMSTATE_STRUCT(gpe, PIIX4PMState, 2, vmstate_gpe, struct gpe_regs),
319 VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
321 VMSTATE_END_OF_LIST()
325 static void piix4_reset(void *opaque)
327 PIIX4PMState *s = opaque;
328 uint8_t *pci_conf = s->dev.config;
335 if (s->kvm_enabled) {
336 /* Mark SMM as already inited (until KVM supports SMM). */
337 pci_conf[0x5B] = 0x02;
341 static void piix4_powerdown(void *opaque, int irq, int power_failing)
343 PIIX4PMState *s = opaque;
346 qemu_system_shutdown_request();
347 } else if (s->pmen & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
348 s->pmsts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
353 static int piix4_pm_initfn(PCIDevice *dev)
355 PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
358 pci_conf = s->dev.config;
359 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
360 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_3);
361 pci_conf[0x06] = 0x80;
362 pci_conf[0x07] = 0x02;
363 pci_conf[0x08] = 0x03; // revision number
364 pci_conf[0x09] = 0x00;
365 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
366 pci_conf[0x3d] = 0x01; // interrupt pin 1
368 pci_conf[0x40] = 0x01; /* PM io base read only bit */
371 apm_init(&s->apm, apm_ctrl_changed, s);
373 register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
375 if (s->kvm_enabled) {
376 /* Mark SMM as already inited to prevent SMM from running. KVM does not
377 * support SMM mode. */
378 pci_conf[0x5B] = 0x02;
381 /* XXX: which specification is used ? The i82731AB has different
383 pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
384 pci_conf[0x63] = 0x60;
385 pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
386 (serial_hds[1] != NULL ? 0x90 : 0);
388 pci_conf[0x90] = s->smb_io_base | 1;
389 pci_conf[0x91] = s->smb_io_base >> 8;
390 pci_conf[0xd2] = 0x09;
391 register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb);
392 register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb);
394 s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
396 qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
398 pm_smbus_init(&s->dev.qdev, &s->smb);
399 qemu_register_reset(piix4_reset, s);
400 piix4_acpi_system_hot_add_init(dev->bus, s);
405 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
406 qemu_irq sci_irq, qemu_irq cmos_s3, qemu_irq smi_irq,
412 dev = pci_create(bus, devfn, "PIIX4_PM");
413 qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
415 s = DO_UPCAST(PIIX4PMState, dev, dev);
417 s->cmos_s3 = cmos_s3;
418 s->smi_irq = smi_irq;
419 s->kvm_enabled = kvm_enabled;
421 qdev_init_nofail(&dev->qdev);
426 static PCIDeviceInfo piix4_pm_info = {
427 .qdev.name = "PIIX4_PM",
429 .qdev.size = sizeof(PIIX4PMState),
430 .qdev.vmsd = &vmstate_acpi,
431 .init = piix4_pm_initfn,
432 .config_write = pm_write_config,
433 .qdev.props = (Property[]) {
434 DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
435 DEFINE_PROP_END_OF_LIST(),
439 static void piix4_pm_register(void)
441 pci_qdev_register(&piix4_pm_info);
444 device_init(piix4_pm_register);
446 static uint32_t gpe_read_val(uint16_t val, uint32_t addr)
449 return (val >> 8) & 0xff;
453 static uint32_t gpe_readb(void *opaque, uint32_t addr)
456 PIIX4PMState *s = opaque;
457 struct gpe_regs *g = &s->gpe;
462 val = gpe_read_val(g->sts, addr);
466 val = gpe_read_val(g->en, addr);
472 PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
476 static void gpe_write_val(uint16_t *cur, int addr, uint32_t val)
479 *cur = (*cur & 0xff) | (val << 8);
481 *cur = (*cur & 0xff00) | (val & 0xff);
484 static void gpe_reset_val(uint16_t *cur, int addr, uint32_t val)
486 uint16_t x1, x0 = val & 0xff;
487 int shift = (addr & 1) ? 8 : 0;
489 x1 = (*cur >> shift) & 0xff;
493 *cur = (*cur & (0xff << (8 - shift))) | (x1 << shift);
496 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
498 PIIX4PMState *s = opaque;
499 struct gpe_regs *g = &s->gpe;
504 gpe_reset_val(&g->sts, addr, val);
508 gpe_write_val(&g->en, addr, val);
516 PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
519 static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
522 struct pci_status *g = opaque;
534 PIIX4_DPRINTF("pcihotplug read %x == %x\n", addr, val);
538 static void pcihotplug_write(void *opaque, uint32_t addr, uint32_t val)
540 struct pci_status *g = opaque;
550 PIIX4_DPRINTF("pcihotplug write %x <== %d\n", addr, val);
553 static uint32_t pciej_read(void *opaque, uint32_t addr)
555 PIIX4_DPRINTF("pciej read %x\n", addr);
559 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
561 BusState *bus = opaque;
562 DeviceState *qdev, *next;
564 int slot = ffs(val) - 1;
566 QLIST_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
567 dev = DO_UPCAST(PCIDevice, qdev, qdev);
568 if (PCI_SLOT(dev->devfn) == slot) {
574 PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
577 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
578 PCIHotplugState state);
580 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
582 struct pci_status *pci0_status = &s->pci0_status;
584 register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, s);
585 register_ioport_read(GPE_BASE, 4, 1, gpe_readb, s);
587 register_ioport_write(PCI_BASE, 8, 4, pcihotplug_write, pci0_status);
588 register_ioport_read(PCI_BASE, 8, 4, pcihotplug_read, pci0_status);
590 register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
591 register_ioport_read(PCI_EJ_BASE, 4, 4, pciej_read, bus);
593 pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
596 static void enable_device(PIIX4PMState *s, int slot)
598 s->gpe.sts |= PIIX4_PCI_HOTPLUG_STATUS;
599 s->pci0_status.up |= (1 << slot);
602 static void disable_device(PIIX4PMState *s, int slot)
604 s->gpe.sts |= PIIX4_PCI_HOTPLUG_STATUS;
605 s->pci0_status.down |= (1 << slot);
608 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
609 PCIHotplugState state)
611 int slot = PCI_SLOT(dev->devfn);
612 PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
613 DO_UPCAST(PCIDevice, qdev, qdev));
615 /* Don't send event when device is enabled during qemu machine creation:
616 * it is present on boot, no hotplug event is necessary. We do send an
617 * event when the device is disabled later. */
618 if (state == PCI_COLDPLUG_ENABLED) {
622 s->pci0_status.up = 0;
623 s->pci0_status.down = 0;
624 if (state == PCI_HOTPLUG_ENABLED) {
625 enable_device(s, slot);
627 disable_device(s, slot);