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 {
62 int64_t tmr_overflow_time;
74 struct pci_status pci0_status;
77 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
79 #define ACPI_ENABLE 0xf1
80 #define ACPI_DISABLE 0xf0
82 static uint32_t get_pmtmr(PIIX4PMState *s)
85 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY, get_ticks_per_sec());
89 static int get_pmsts(PIIX4PMState *s)
93 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
95 if (d >= s->tmr_overflow_time)
96 s->pmsts |= ACPI_BITMASK_TIMER_STATUS;
100 static void pm_update_sci(PIIX4PMState *s)
102 int sci_level, pmsts;
105 pmsts = get_pmsts(s);
106 sci_level = (((pmsts & s->pmen) &
107 (ACPI_BITMASK_RT_CLOCK_ENABLE |
108 ACPI_BITMASK_POWER_BUTTON_ENABLE |
109 ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
110 ACPI_BITMASK_TIMER_ENABLE)) != 0) ||
111 (((s->gpe.sts & s->gpe.en) & PIIX4_PCI_HOTPLUG_STATUS) != 0);
113 qemu_set_irq(s->irq, sci_level);
114 /* schedule a timer interruption if needed */
115 if ((s->pmen & ACPI_BITMASK_TIMER_ENABLE) &&
116 !(pmsts & ACPI_BITMASK_TIMER_STATUS)) {
117 expire_time = muldiv64(s->tmr_overflow_time, get_ticks_per_sec(),
119 qemu_mod_timer(s->tmr_timer, expire_time);
121 qemu_del_timer(s->tmr_timer);
125 static void pm_tmr_timer(void *opaque)
127 PIIX4PMState *s = opaque;
131 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
133 PIIX4PMState *s = opaque;
140 pmsts = get_pmsts(s);
141 if (pmsts & val & ACPI_BITMASK_TIMER_STATUS) {
142 /* if TMRSTS is reset, then compute the new overflow time */
143 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
144 get_ticks_per_sec());
145 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
158 s->pmcntrl = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
159 if (val & ACPI_BITMASK_SLEEP_ENABLE) {
160 /* change suspend type */
161 sus_typ = (val >> 10) & 7;
163 case 0: /* soft power off */
164 qemu_system_shutdown_request();
167 /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
168 Pretend that resume was caused by power button */
169 s->pmsts |= (ACPI_BITMASK_WAKE_STATUS |
170 ACPI_BITMASK_POWER_BUTTON_STATUS);
171 qemu_system_reset_request();
173 qemu_irq_raise(s->cmos_s3);
184 PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", addr, val);
187 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
189 PIIX4PMState *s = opaque;
207 PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", addr, val);
211 static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
213 // PIIX4PMState *s = opaque;
214 PIIX4_DPRINTF("PM writel port=0x%04x val=0x%08x\n", addr & 0x3f, val);
217 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
219 PIIX4PMState *s = opaque;
231 PIIX4_DPRINTF("PM readl port=0x%04x val=0x%08x\n", addr, val);
235 static void apm_ctrl_changed(uint32_t val, void *arg)
237 PIIX4PMState *s = arg;
239 /* ACPI specs 3.0, 4.7.2.5 */
240 if (val == ACPI_ENABLE) {
241 s->pmcntrl |= ACPI_BITMASK_SCI_ENABLE;
242 } else if (val == ACPI_DISABLE) {
243 s->pmcntrl &= ~ACPI_BITMASK_SCI_ENABLE;
246 if (s->dev.config[0x5b] & (1 << 1)) {
248 qemu_irq_raise(s->smi_irq);
253 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
255 PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val);
258 static void pm_io_space_update(PIIX4PMState *s)
262 if (s->dev.config[0x80] & 1) {
263 pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
264 pm_io_base &= 0xffc0;
266 /* XXX: need to improve memory and ioport allocation */
267 PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base);
268 register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
269 register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
270 register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
271 register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
275 static void pm_write_config(PCIDevice *d,
276 uint32_t address, uint32_t val, int len)
278 pci_default_write_config(d, address, val, len);
279 if (range_covers_byte(address, len, 0x80))
280 pm_io_space_update((PIIX4PMState *)d);
283 static int vmstate_acpi_post_load(void *opaque, int version_id)
285 PIIX4PMState *s = opaque;
287 pm_io_space_update(s);
291 static const VMStateDescription vmstate_gpe = {
294 .minimum_version_id = 1,
295 .minimum_version_id_old = 1,
296 .fields = (VMStateField []) {
297 VMSTATE_UINT16(sts, struct gpe_regs),
298 VMSTATE_UINT16(en, struct gpe_regs),
299 VMSTATE_END_OF_LIST()
303 static const VMStateDescription vmstate_pci_status = {
304 .name = "pci_status",
306 .minimum_version_id = 1,
307 .minimum_version_id_old = 1,
308 .fields = (VMStateField []) {
309 VMSTATE_UINT32(up, struct pci_status),
310 VMSTATE_UINT32(down, struct pci_status),
311 VMSTATE_END_OF_LIST()
315 static const VMStateDescription vmstate_acpi = {
318 .minimum_version_id = 1,
319 .minimum_version_id_old = 1,
320 .post_load = vmstate_acpi_post_load,
321 .fields = (VMStateField []) {
322 VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
323 VMSTATE_UINT16(pmsts, PIIX4PMState),
324 VMSTATE_UINT16(pmen, PIIX4PMState),
325 VMSTATE_UINT16(pmcntrl, PIIX4PMState),
326 VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
327 VMSTATE_TIMER(tmr_timer, PIIX4PMState),
328 VMSTATE_INT64(tmr_overflow_time, PIIX4PMState),
329 VMSTATE_STRUCT(gpe, PIIX4PMState, 2, vmstate_gpe, struct gpe_regs),
330 VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
332 VMSTATE_END_OF_LIST()
336 static void piix4_reset(void *opaque)
338 PIIX4PMState *s = opaque;
339 uint8_t *pci_conf = s->dev.config;
346 if (s->kvm_enabled) {
347 /* Mark SMM as already inited (until KVM supports SMM). */
348 pci_conf[0x5B] = 0x02;
352 static void piix4_powerdown(void *opaque, int irq, int power_failing)
354 PIIX4PMState *s = opaque;
357 qemu_system_shutdown_request();
358 } else if (s->pmen & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
359 s->pmsts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
364 static int piix4_pm_initfn(PCIDevice *dev)
366 PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
369 pci_conf = s->dev.config;
370 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
371 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_3);
372 pci_conf[0x06] = 0x80;
373 pci_conf[0x07] = 0x02;
374 pci_conf[0x08] = 0x03; // revision number
375 pci_conf[0x09] = 0x00;
376 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
377 pci_conf[0x3d] = 0x01; // interrupt pin 1
379 pci_conf[0x40] = 0x01; /* PM io base read only bit */
382 apm_init(&s->apm, apm_ctrl_changed, s);
384 register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
386 if (s->kvm_enabled) {
387 /* Mark SMM as already inited to prevent SMM from running. KVM does not
388 * support SMM mode. */
389 pci_conf[0x5B] = 0x02;
392 /* XXX: which specification is used ? The i82731AB has different
394 pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
395 pci_conf[0x63] = 0x60;
396 pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
397 (serial_hds[1] != NULL ? 0x90 : 0);
399 pci_conf[0x90] = s->smb_io_base | 1;
400 pci_conf[0x91] = s->smb_io_base >> 8;
401 pci_conf[0xd2] = 0x09;
402 register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb);
403 register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb);
405 s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
407 qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
409 pm_smbus_init(&s->dev.qdev, &s->smb);
410 qemu_register_reset(piix4_reset, s);
411 piix4_acpi_system_hot_add_init(dev->bus, s);
416 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
417 qemu_irq sci_irq, qemu_irq cmos_s3, qemu_irq smi_irq,
423 dev = pci_create(bus, devfn, "PIIX4_PM");
424 qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
426 s = DO_UPCAST(PIIX4PMState, dev, dev);
428 s->cmos_s3 = cmos_s3;
429 s->smi_irq = smi_irq;
430 s->kvm_enabled = kvm_enabled;
432 qdev_init_nofail(&dev->qdev);
437 static PCIDeviceInfo piix4_pm_info = {
438 .qdev.name = "PIIX4_PM",
440 .qdev.size = sizeof(PIIX4PMState),
441 .qdev.vmsd = &vmstate_acpi,
442 .init = piix4_pm_initfn,
443 .config_write = pm_write_config,
444 .qdev.props = (Property[]) {
445 DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
446 DEFINE_PROP_END_OF_LIST(),
450 static void piix4_pm_register(void)
452 pci_qdev_register(&piix4_pm_info);
455 device_init(piix4_pm_register);
457 static uint32_t gpe_read_val(uint16_t val, uint32_t addr)
460 return (val >> 8) & 0xff;
464 static uint32_t gpe_readb(void *opaque, uint32_t addr)
467 PIIX4PMState *s = opaque;
468 struct gpe_regs *g = &s->gpe;
473 val = gpe_read_val(g->sts, addr);
477 val = gpe_read_val(g->en, addr);
483 PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
487 static void gpe_write_val(uint16_t *cur, int addr, uint32_t val)
490 *cur = (*cur & 0xff) | (val << 8);
492 *cur = (*cur & 0xff00) | (val & 0xff);
495 static void gpe_reset_val(uint16_t *cur, int addr, uint32_t val)
497 uint16_t x1, x0 = val & 0xff;
498 int shift = (addr & 1) ? 8 : 0;
500 x1 = (*cur >> shift) & 0xff;
504 *cur = (*cur & (0xff << (8 - shift))) | (x1 << shift);
507 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
509 PIIX4PMState *s = opaque;
510 struct gpe_regs *g = &s->gpe;
515 gpe_reset_val(&g->sts, addr, val);
519 gpe_write_val(&g->en, addr, val);
527 PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
530 static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
533 struct pci_status *g = opaque;
545 PIIX4_DPRINTF("pcihotplug read %x == %x\n", addr, val);
549 static void pcihotplug_write(void *opaque, uint32_t addr, uint32_t val)
551 struct pci_status *g = opaque;
561 PIIX4_DPRINTF("pcihotplug write %x <== %d\n", addr, val);
564 static uint32_t pciej_read(void *opaque, uint32_t addr)
566 PIIX4_DPRINTF("pciej read %x\n", addr);
570 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
572 BusState *bus = opaque;
573 DeviceState *qdev, *next;
575 int slot = ffs(val) - 1;
577 QLIST_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
578 dev = DO_UPCAST(PCIDevice, qdev, qdev);
579 if (PCI_SLOT(dev->devfn) == slot) {
585 PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
588 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state);
590 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
592 struct pci_status *pci0_status = &s->pci0_status;
594 register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, s);
595 register_ioport_read(GPE_BASE, 4, 1, gpe_readb, s);
597 register_ioport_write(PCI_BASE, 8, 4, pcihotplug_write, pci0_status);
598 register_ioport_read(PCI_BASE, 8, 4, pcihotplug_read, pci0_status);
600 register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
601 register_ioport_read(PCI_EJ_BASE, 4, 4, pciej_read, bus);
603 pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
606 static void enable_device(PIIX4PMState *s, int slot)
608 s->gpe.sts |= PIIX4_PCI_HOTPLUG_STATUS;
609 s->pci0_status.up |= (1 << slot);
612 static void disable_device(PIIX4PMState *s, int slot)
614 s->gpe.sts |= PIIX4_PCI_HOTPLUG_STATUS;
615 s->pci0_status.down |= (1 << slot);
618 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state)
620 int slot = PCI_SLOT(dev->devfn);
621 PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
622 DO_UPCAST(PCIDevice, qdev, qdev));
624 if (!dev->qdev.hotplugged)
627 s->pci0_status.up = 0;
628 s->pci0_status.down = 0;
630 enable_device(s, slot);
632 disable_device(s, slot);