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/>
29 # define PIIX4_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
31 # define PIIX4_DPRINTF(format, ...) do { } while (0)
34 #define ACPI_DBG_IO_ADDR 0xb044
36 #define GPE_BASE 0xafe0
37 #define PCI_BASE 0xae00
38 #define PCI_EJ_BASE 0xae08
41 uint16_t sts; /* status */
42 uint16_t en; /* enabled */
50 typedef struct PIIX4PMState {
59 int64_t tmr_overflow_time;
71 struct pci_status pci0_status;
74 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
76 #define ACPI_ENABLE 0xf1
77 #define ACPI_DISABLE 0xf0
79 static uint32_t get_pmtmr(PIIX4PMState *s)
82 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY, get_ticks_per_sec());
86 static int get_pmsts(PIIX4PMState *s)
90 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
92 if (d >= s->tmr_overflow_time)
93 s->pmsts |= ACPI_BITMASK_TIMER_STATUS;
97 static void pm_update_sci(PIIX4PMState *s)
102 pmsts = get_pmsts(s);
103 sci_level = (((pmsts & s->pmen) &
104 (ACPI_BITMASK_RT_CLOCK_ENABLE |
105 ACPI_BITMASK_POWER_BUTTON_ENABLE |
106 ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
107 ACPI_BITMASK_TIMER_ENABLE)) != 0);
108 qemu_set_irq(s->irq, sci_level);
109 /* schedule a timer interruption if needed */
110 if ((s->pmen & ACPI_BITMASK_TIMER_ENABLE) &&
111 !(pmsts & ACPI_BITMASK_TIMER_STATUS)) {
112 expire_time = muldiv64(s->tmr_overflow_time, get_ticks_per_sec(),
114 qemu_mod_timer(s->tmr_timer, expire_time);
116 qemu_del_timer(s->tmr_timer);
120 static void pm_tmr_timer(void *opaque)
122 PIIX4PMState *s = opaque;
126 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
128 PIIX4PMState *s = opaque;
135 pmsts = get_pmsts(s);
136 if (pmsts & val & ACPI_BITMASK_TIMER_STATUS) {
137 /* if TMRSTS is reset, then compute the new overflow time */
138 d = muldiv64(qemu_get_clock(vm_clock), PM_TIMER_FREQUENCY,
139 get_ticks_per_sec());
140 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
153 s->pmcntrl = val & ~(ACPI_BITMASK_SLEEP_ENABLE);
154 if (val & ACPI_BITMASK_SLEEP_ENABLE) {
155 /* change suspend type */
156 sus_typ = (val >> 10) & 7;
158 case 0: /* soft power off */
159 qemu_system_shutdown_request();
162 /* ACPI_BITMASK_WAKE_STATUS should be set on resume.
163 Pretend that resume was caused by power button */
164 s->pmsts |= (ACPI_BITMASK_WAKE_STATUS |
165 ACPI_BITMASK_POWER_BUTTON_STATUS);
166 qemu_system_reset_request();
168 qemu_irq_raise(s->cmos_s3);
179 PIIX4_DPRINTF("PM writew port=0x%04x val=0x%04x\n", addr, val);
182 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
184 PIIX4PMState *s = opaque;
202 PIIX4_DPRINTF("PM readw port=0x%04x val=0x%04x\n", addr, val);
206 static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
208 // PIIX4PMState *s = opaque;
209 PIIX4_DPRINTF("PM writel port=0x%04x val=0x%08x\n", addr & 0x3f, val);
212 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
214 PIIX4PMState *s = opaque;
226 PIIX4_DPRINTF("PM readl port=0x%04x val=0x%08x\n", addr, val);
230 static void apm_ctrl_changed(uint32_t val, void *arg)
232 PIIX4PMState *s = arg;
234 /* ACPI specs 3.0, 4.7.2.5 */
235 if (val == ACPI_ENABLE) {
236 s->pmcntrl |= ACPI_BITMASK_SCI_ENABLE;
237 } else if (val == ACPI_DISABLE) {
238 s->pmcntrl &= ~ACPI_BITMASK_SCI_ENABLE;
241 if (s->dev.config[0x5b] & (1 << 1)) {
243 qemu_irq_raise(s->smi_irq);
248 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
250 PIIX4_DPRINTF("ACPI: DBG: 0x%08x\n", val);
253 static void pm_io_space_update(PIIX4PMState *s)
257 if (s->dev.config[0x80] & 1) {
258 pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
259 pm_io_base &= 0xffc0;
261 /* XXX: need to improve memory and ioport allocation */
262 PIIX4_DPRINTF("PM: mapping to 0x%x\n", pm_io_base);
263 register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
264 register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
265 register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
266 register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
270 static void pm_write_config(PCIDevice *d,
271 uint32_t address, uint32_t val, int len)
273 pci_default_write_config(d, address, val, len);
274 if (range_covers_byte(address, len, 0x80))
275 pm_io_space_update((PIIX4PMState *)d);
278 static int vmstate_acpi_post_load(void *opaque, int version_id)
280 PIIX4PMState *s = opaque;
282 pm_io_space_update(s);
286 static const VMStateDescription vmstate_gpe = {
289 .minimum_version_id = 1,
290 .minimum_version_id_old = 1,
291 .fields = (VMStateField []) {
292 VMSTATE_UINT16(sts, struct gpe_regs),
293 VMSTATE_UINT16(en, struct gpe_regs),
294 VMSTATE_END_OF_LIST()
298 static const VMStateDescription vmstate_pci_status = {
299 .name = "pci_status",
301 .minimum_version_id = 1,
302 .minimum_version_id_old = 1,
303 .fields = (VMStateField []) {
304 VMSTATE_UINT32(up, struct pci_status),
305 VMSTATE_UINT32(down, struct pci_status),
306 VMSTATE_END_OF_LIST()
310 static const VMStateDescription vmstate_acpi = {
313 .minimum_version_id = 1,
314 .minimum_version_id_old = 1,
315 .post_load = vmstate_acpi_post_load,
316 .fields = (VMStateField []) {
317 VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
318 VMSTATE_UINT16(pmsts, PIIX4PMState),
319 VMSTATE_UINT16(pmen, PIIX4PMState),
320 VMSTATE_UINT16(pmcntrl, PIIX4PMState),
321 VMSTATE_STRUCT(apm, PIIX4PMState, 0, vmstate_apm, APMState),
322 VMSTATE_TIMER(tmr_timer, PIIX4PMState),
323 VMSTATE_INT64(tmr_overflow_time, PIIX4PMState),
324 VMSTATE_STRUCT(gpe, PIIX4PMState, 2, vmstate_gpe, struct gpe_regs),
325 VMSTATE_STRUCT(pci0_status, PIIX4PMState, 2, vmstate_pci_status,
327 VMSTATE_END_OF_LIST()
331 static void piix4_reset(void *opaque)
333 PIIX4PMState *s = opaque;
334 uint8_t *pci_conf = s->dev.config;
341 if (s->kvm_enabled) {
342 /* Mark SMM as already inited (until KVM supports SMM). */
343 pci_conf[0x5B] = 0x02;
347 static void piix4_powerdown(void *opaque, int irq, int power_failing)
349 PIIX4PMState *s = opaque;
352 qemu_system_shutdown_request();
353 } else if (s->pmen & ACPI_BITMASK_POWER_BUTTON_ENABLE) {
354 s->pmsts |= ACPI_BITMASK_POWER_BUTTON_STATUS;
359 static int piix4_pm_initfn(PCIDevice *dev)
361 PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev, dev);
364 pci_conf = s->dev.config;
365 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
366 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_3);
367 pci_conf[0x06] = 0x80;
368 pci_conf[0x07] = 0x02;
369 pci_conf[0x08] = 0x03; // revision number
370 pci_conf[0x09] = 0x00;
371 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
372 pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
373 pci_conf[0x3d] = 0x01; // interrupt pin 1
375 pci_conf[0x40] = 0x01; /* PM io base read only bit */
378 apm_init(&s->apm, apm_ctrl_changed, s);
380 register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
382 if (s->kvm_enabled) {
383 /* Mark SMM as already inited to prevent SMM from running. KVM does not
384 * support SMM mode. */
385 pci_conf[0x5B] = 0x02;
388 /* XXX: which specification is used ? The i82731AB has different
390 pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
391 pci_conf[0x63] = 0x60;
392 pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
393 (serial_hds[1] != NULL ? 0x90 : 0);
395 pci_conf[0x90] = s->smb_io_base | 1;
396 pci_conf[0x91] = s->smb_io_base >> 8;
397 pci_conf[0xd2] = 0x09;
398 register_ioport_write(s->smb_io_base, 64, 1, smb_ioport_writeb, &s->smb);
399 register_ioport_read(s->smb_io_base, 64, 1, smb_ioport_readb, &s->smb);
401 s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
403 qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
405 pm_smbus_init(&s->dev.qdev, &s->smb);
406 qemu_register_reset(piix4_reset, s);
407 piix4_acpi_system_hot_add_init(dev->bus, s);
412 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
413 qemu_irq sci_irq, qemu_irq cmos_s3, qemu_irq smi_irq,
419 dev = pci_create(bus, devfn, "PIIX4_PM");
420 qdev_prop_set_uint32(&dev->qdev, "smb_io_base", smb_io_base);
422 s = DO_UPCAST(PIIX4PMState, dev, dev);
424 s->cmos_s3 = cmos_s3;
425 s->smi_irq = smi_irq;
426 s->kvm_enabled = kvm_enabled;
428 qdev_init_nofail(&dev->qdev);
433 static PCIDeviceInfo piix4_pm_info = {
434 .qdev.name = "PIIX4_PM",
436 .qdev.size = sizeof(PIIX4PMState),
437 .qdev.vmsd = &vmstate_acpi,
438 .init = piix4_pm_initfn,
439 .config_write = pm_write_config,
440 .qdev.props = (Property[]) {
441 DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
442 DEFINE_PROP_END_OF_LIST(),
446 static void piix4_pm_register(void)
448 pci_qdev_register(&piix4_pm_info);
451 device_init(piix4_pm_register);
453 static uint32_t gpe_read_val(uint16_t val, uint32_t addr)
456 return (val >> 8) & 0xff;
460 static uint32_t gpe_readb(void *opaque, uint32_t addr)
463 struct gpe_regs *g = opaque;
467 val = gpe_read_val(g->sts, addr);
471 val = gpe_read_val(g->en, addr);
477 PIIX4_DPRINTF("gpe read %x == %x\n", addr, val);
481 static void gpe_write_val(uint16_t *cur, int addr, uint32_t val)
484 *cur = (*cur & 0xff) | (val << 8);
486 *cur = (*cur & 0xff00) | (val & 0xff);
489 static void gpe_reset_val(uint16_t *cur, int addr, uint32_t val)
491 uint16_t x1, x0 = val & 0xff;
492 int shift = (addr & 1) ? 8 : 0;
494 x1 = (*cur >> shift) & 0xff;
498 *cur = (*cur & (0xff << (8 - shift))) | (x1 << shift);
501 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
503 struct gpe_regs *g = opaque;
507 gpe_reset_val(&g->sts, addr, val);
511 gpe_write_val(&g->en, addr, val);
517 PIIX4_DPRINTF("gpe write %x <== %d\n", addr, val);
520 static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
523 struct pci_status *g = opaque;
535 PIIX4_DPRINTF("pcihotplug read %x == %x\n", addr, val);
539 static void pcihotplug_write(void *opaque, uint32_t addr, uint32_t val)
541 struct pci_status *g = opaque;
551 PIIX4_DPRINTF("pcihotplug write %x <== %d\n", addr, val);
554 static uint32_t pciej_read(void *opaque, uint32_t addr)
556 PIIX4_DPRINTF("pciej read %x\n", addr);
560 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
562 BusState *bus = opaque;
563 DeviceState *qdev, *next;
565 int slot = ffs(val) - 1;
567 QLIST_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
568 dev = DO_UPCAST(PCIDevice, qdev, qdev);
569 if (PCI_SLOT(dev->devfn) == slot) {
575 PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
578 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state);
580 static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
582 struct gpe_regs *gpe = &s->gpe;
583 struct pci_status *pci0_status = &s->pci0_status;
585 register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, gpe);
586 register_ioport_read(GPE_BASE, 4, 1, gpe_readb, gpe);
588 register_ioport_write(PCI_BASE, 8, 4, pcihotplug_write, pci0_status);
589 register_ioport_read(PCI_BASE, 8, 4, pcihotplug_read, pci0_status);
591 register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
592 register_ioport_read(PCI_EJ_BASE, 4, 4, pciej_read, bus);
594 pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
597 static void enable_device(PIIX4PMState *s, int slot)
600 s->pci0_status.up |= (1 << slot);
603 static void disable_device(PIIX4PMState *s, int slot)
606 s->pci0_status.down |= (1 << slot);
609 static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev, int state)
611 int slot = PCI_SLOT(dev->devfn);
612 PIIX4PMState *s = DO_UPCAST(PIIX4PMState, dev,
613 DO_UPCAST(PCIDevice, qdev, qdev));
615 s->pci0_status.up = 0;
616 s->pci0_status.down = 0;
618 enable_device(s, slot);
620 disable_device(s, slot);
623 qemu_set_irq(s->irq, 1);
624 qemu_set_irq(s->irq, 0);