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/>
21 #include "qemu-timer.h"
28 /* i82731AB (PIIX4) compatible power management function */
29 #define PM_FREQ 3579545
31 #define ACPI_DBG_IO_ADDR 0xb044
33 typedef struct PIIX4PMState {
41 int64_t tmr_overflow_time;
57 #define RSM_STS (1 << 15)
58 #define PWRBTN_STS (1 << 8)
59 #define RTC_EN (1 << 10)
60 #define PWRBTN_EN (1 << 8)
61 #define GBL_EN (1 << 5)
62 #define TMROF_EN (1 << 0)
64 #define SCI_EN (1 << 0)
66 #define SUS_EN (1 << 13)
68 #define ACPI_ENABLE 0xf1
69 #define ACPI_DISABLE 0xf0
71 #define SMBHSTSTS 0x00
72 #define SMBHSTCNT 0x02
73 #define SMBHSTCMD 0x03
74 #define SMBHSTADD 0x04
75 #define SMBHSTDAT0 0x05
76 #define SMBHSTDAT1 0x06
77 #define SMBBLKDAT 0x07
79 static PIIX4PMState *pm_state;
81 static uint32_t get_pmtmr(PIIX4PMState *s)
84 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, get_ticks_per_sec());
88 static int get_pmsts(PIIX4PMState *s)
93 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, get_ticks_per_sec());
94 if (d >= s->tmr_overflow_time)
99 static void pm_update_sci(PIIX4PMState *s)
101 int sci_level, pmsts;
104 pmsts = get_pmsts(s);
105 sci_level = (((pmsts & s->pmen) &
106 (RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0);
107 qemu_set_irq(s->irq, sci_level);
108 /* schedule a timer interruption if needed */
109 if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) {
110 expire_time = muldiv64(s->tmr_overflow_time, get_ticks_per_sec(), PM_FREQ);
111 qemu_mod_timer(s->tmr_timer, expire_time);
113 qemu_del_timer(s->tmr_timer);
117 static void pm_tmr_timer(void *opaque)
119 PIIX4PMState *s = opaque;
123 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
125 PIIX4PMState *s = opaque;
132 pmsts = get_pmsts(s);
133 if (pmsts & val & TMROF_EN) {
134 /* if TMRSTS is reset, then compute the new overflow time */
135 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ,
136 get_ticks_per_sec());
137 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
150 s->pmcntrl = val & ~(SUS_EN);
152 /* change suspend type */
153 sus_typ = (val >> 10) & 7;
155 case 0: /* soft power off */
156 qemu_system_shutdown_request();
159 /* RSM_STS should be set on resume. Pretend that resume
160 was caused by power button */
161 s->pmsts |= (RSM_STS | PWRBTN_STS);
162 qemu_system_reset_request();
164 qemu_irq_raise(s->cmos_s3);
176 printf("PM writew port=0x%04x val=0x%04x\n", addr, val);
180 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
182 PIIX4PMState *s = opaque;
201 printf("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;
211 printf("PM writel port=0x%04x val=0x%08x\n", addr, val);
215 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
217 PIIX4PMState *s = opaque;
230 printf("PM readl port=0x%04x val=0x%08x\n", addr, val);
235 static void pm_smi_writeb(void *opaque, uint32_t addr, uint32_t val)
237 PIIX4PMState *s = opaque;
240 printf("pm_smi_writeb addr=0x%x val=0x%02x\n", addr, val);
245 /* ACPI specs 3.0, 4.7.2.5 */
246 if (val == ACPI_ENABLE) {
247 s->pmcntrl |= SCI_EN;
248 } else if (val == ACPI_DISABLE) {
249 s->pmcntrl &= ~SCI_EN;
252 if (s->dev.config[0x5b] & (1 << 1)) {
254 qemu_irq_raise(s->smi_irq);
262 static uint32_t pm_smi_readb(void *opaque, uint32_t addr)
264 PIIX4PMState *s = opaque;
274 printf("pm_smi_readb addr=0x%x val=0x%02x\n", addr, val);
279 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
282 printf("ACPI: DBG: 0x%08x\n", val);
286 static void smb_transaction(PIIX4PMState *s)
288 uint8_t prot = (s->smb_ctl >> 2) & 0x07;
289 uint8_t read = s->smb_addr & 0x01;
290 uint8_t cmd = s->smb_cmd;
291 uint8_t addr = s->smb_addr >> 1;
292 i2c_bus *bus = s->smbus;
295 printf("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot);
299 smbus_quick_command(bus, addr, read);
303 s->smb_data0 = smbus_receive_byte(bus, addr);
305 smbus_send_byte(bus, addr, cmd);
310 s->smb_data0 = smbus_read_byte(bus, addr, cmd);
312 smbus_write_byte(bus, addr, cmd, s->smb_data0);
318 val = smbus_read_word(bus, addr, cmd);
320 s->smb_data1 = val >> 8;
322 smbus_write_word(bus, addr, cmd, (s->smb_data1 << 8) | s->smb_data0);
327 s->smb_data0 = smbus_read_block(bus, addr, cmd, s->smb_data);
329 smbus_write_block(bus, addr, cmd, s->smb_data, s->smb_data0);
341 static void smb_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
343 PIIX4PMState *s = opaque;
346 printf("SMB writeb port=0x%04x val=0x%02x\n", addr, val);
371 s->smb_data[s->smb_index++] = val;
372 if (s->smb_index > 31)
380 static uint32_t smb_ioport_readb(void *opaque, uint32_t addr)
382 PIIX4PMState *s = opaque;
392 val = s->smb_ctl & 0x1f;
407 val = s->smb_data[s->smb_index++];
408 if (s->smb_index > 31)
416 printf("SMB readb port=0x%04x val=0x%02x\n", addr, val);
421 static void pm_io_space_update(PIIX4PMState *s)
425 if (s->dev.config[0x80] & 1) {
426 pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
427 pm_io_base &= 0xffc0;
429 /* XXX: need to improve memory and ioport allocation */
431 printf("PM: mapping to 0x%x\n", pm_io_base);
433 register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
434 register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
435 register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
436 register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
440 static void pm_write_config(PCIDevice *d,
441 uint32_t address, uint32_t val, int len)
443 pci_default_write_config(d, address, val, len);
444 if (range_covers_byte(address, len, 0x80))
445 pm_io_space_update((PIIX4PMState *)d);
448 static int vmstate_acpi_post_load(void *opaque, int version_id)
450 PIIX4PMState *s = opaque;
452 pm_io_space_update(s);
456 static const VMStateDescription vmstate_acpi = {
459 .minimum_version_id = 1,
460 .minimum_version_id_old = 1,
461 .post_load = vmstate_acpi_post_load,
462 .fields = (VMStateField []) {
463 VMSTATE_PCI_DEVICE(dev, PIIX4PMState),
464 VMSTATE_UINT16(pmsts, PIIX4PMState),
465 VMSTATE_UINT16(pmen, PIIX4PMState),
466 VMSTATE_UINT16(pmcntrl, PIIX4PMState),
467 VMSTATE_UINT8(apmc, PIIX4PMState),
468 VMSTATE_UINT8(apms, PIIX4PMState),
469 VMSTATE_TIMER(tmr_timer, PIIX4PMState),
470 VMSTATE_INT64(tmr_overflow_time, PIIX4PMState),
471 VMSTATE_END_OF_LIST()
475 static void piix4_reset(void *opaque)
477 PIIX4PMState *s = opaque;
478 uint8_t *pci_conf = s->dev.config;
485 if (s->kvm_enabled) {
486 /* Mark SMM as already inited (until KVM supports SMM). */
487 pci_conf[0x5B] = 0x02;
491 static void piix4_powerdown(void *opaque, int irq, int power_failing)
493 PIIX4PMState *s = opaque;
496 qemu_system_shutdown_request();
497 } else if (s->pmen & PWRBTN_EN) {
498 s->pmsts |= PWRBTN_EN;
503 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
504 qemu_irq sci_irq, qemu_irq cmos_s3, qemu_irq smi_irq,
510 s = (PIIX4PMState *)pci_register_device(bus,
511 "PM", sizeof(PIIX4PMState),
512 devfn, NULL, pm_write_config);
514 pci_conf = s->dev.config;
515 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
516 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_3);
517 pci_conf[0x06] = 0x80;
518 pci_conf[0x07] = 0x02;
519 pci_conf[0x08] = 0x03; // revision number
520 pci_conf[0x09] = 0x00;
521 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
522 pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
523 pci_conf[0x3d] = 0x01; // interrupt pin 1
525 pci_conf[0x40] = 0x01; /* PM io base read only bit */
527 register_ioport_write(0xb2, 2, 1, pm_smi_writeb, s);
528 register_ioport_read(0xb2, 2, 1, pm_smi_readb, s);
530 register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
532 s->kvm_enabled = kvm_enabled;
533 if (s->kvm_enabled) {
534 /* Mark SMM as already inited to prevent SMM from running. KVM does not
535 * support SMM mode. */
536 pci_conf[0x5B] = 0x02;
539 /* XXX: which specification is used ? The i82731AB has different
541 pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
542 pci_conf[0x63] = 0x60;
543 pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
544 (serial_hds[1] != NULL ? 0x90 : 0);
546 pci_conf[0x90] = smb_io_base | 1;
547 pci_conf[0x91] = smb_io_base >> 8;
548 pci_conf[0xd2] = 0x09;
549 register_ioport_write(smb_io_base, 64, 1, smb_ioport_writeb, s);
550 register_ioport_read(smb_io_base, 64, 1, smb_ioport_readb, s);
552 s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
554 qemu_system_powerdown = *qemu_allocate_irqs(piix4_powerdown, s, 1);
556 vmstate_register(0, &vmstate_acpi, s);
558 s->smbus = i2c_init_bus(NULL, "i2c");
560 s->cmos_s3 = cmos_s3;
561 s->smi_irq = smi_irq;
562 qemu_register_reset(piix4_reset, s);
567 #define GPE_BASE 0xafe0
568 #define PCI_BASE 0xae00
569 #define PCI_EJ_BASE 0xae08
572 uint16_t sts; /* status */
573 uint16_t en; /* enabled */
581 static struct gpe_regs gpe;
582 static struct pci_status pci0_status;
584 static uint32_t gpe_read_val(uint16_t val, uint32_t addr)
587 return (val >> 8) & 0xff;
591 static uint32_t gpe_readb(void *opaque, uint32_t addr)
594 struct gpe_regs *g = opaque;
598 val = gpe_read_val(g->sts, addr);
602 val = gpe_read_val(g->en, addr);
609 printf("gpe read %x == %x\n", addr, val);
614 static void gpe_write_val(uint16_t *cur, int addr, uint32_t val)
617 *cur = (*cur & 0xff) | (val << 8);
619 *cur = (*cur & 0xff00) | (val & 0xff);
622 static void gpe_reset_val(uint16_t *cur, int addr, uint32_t val)
624 uint16_t x1, x0 = val & 0xff;
625 int shift = (addr & 1) ? 8 : 0;
627 x1 = (*cur >> shift) & 0xff;
631 *cur = (*cur & (0xff << (8 - shift))) | (x1 << shift);
634 static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
636 struct gpe_regs *g = opaque;
640 gpe_reset_val(&g->sts, addr, val);
644 gpe_write_val(&g->en, addr, val);
651 printf("gpe write %x <== %d\n", addr, val);
655 static uint32_t pcihotplug_read(void *opaque, uint32_t addr)
658 struct pci_status *g = opaque;
671 printf("pcihotplug read %x == %x\n", addr, val);
676 static void pcihotplug_write(void *opaque, uint32_t addr, uint32_t val)
678 struct pci_status *g = opaque;
689 printf("pcihotplug write %x <== %d\n", addr, val);
693 static uint32_t pciej_read(void *opaque, uint32_t addr)
696 printf("pciej read %x\n", addr);
701 static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
703 BusState *bus = opaque;
704 DeviceState *qdev, *next;
706 int slot = ffs(val) - 1;
708 QLIST_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
709 dev = DO_UPCAST(PCIDevice, qdev, qdev);
710 if (PCI_SLOT(dev->devfn) == slot) {
717 printf("pciej write %x <== %d\n", addr, val);
721 static int piix4_device_hotplug(PCIDevice *dev, int state);
723 void piix4_acpi_system_hot_add_init(PCIBus *bus)
725 register_ioport_write(GPE_BASE, 4, 1, gpe_writeb, &gpe);
726 register_ioport_read(GPE_BASE, 4, 1, gpe_readb, &gpe);
728 register_ioport_write(PCI_BASE, 8, 4, pcihotplug_write, &pci0_status);
729 register_ioport_read(PCI_BASE, 8, 4, pcihotplug_read, &pci0_status);
731 register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
732 register_ioport_read(PCI_EJ_BASE, 4, 4, pciej_read, bus);
734 pci_bus_hotplug(bus, piix4_device_hotplug);
737 static void enable_device(struct pci_status *p, struct gpe_regs *g, int slot)
740 p->up |= (1 << slot);
743 static void disable_device(struct pci_status *p, struct gpe_regs *g, int slot)
746 p->down |= (1 << slot);
749 static int piix4_device_hotplug(PCIDevice *dev, int state)
751 int slot = PCI_SLOT(dev->devfn);
754 pci0_status.down = 0;
756 enable_device(&pci0_status, &gpe, slot);
758 disable_device(&pci0_status, &gpe, slot);
760 qemu_set_irq(pm_state->irq, 1);
761 qemu_set_irq(pm_state->irq, 0);
766 struct acpi_table_header
768 char signature [4]; /* ACPI signature (4 ASCII characters) */
769 uint32_t length; /* Length of table, in bytes, including header */
770 uint8_t revision; /* ACPI Specification minor version # */
771 uint8_t checksum; /* To make sum of entire table == 0 */
772 char oem_id [6]; /* OEM identification */
773 char oem_table_id [8]; /* OEM table identification */
774 uint32_t oem_revision; /* OEM revision number */
775 char asl_compiler_id [4]; /* ASL compiler vendor ID */
776 uint32_t asl_compiler_revision; /* ASL compiler revision number */
777 } __attribute__((packed));
780 size_t acpi_tables_len;
782 static int acpi_checksum(const uint8_t *data, int len)
786 for(i = 0; i < len; i++)
788 return (-sum) & 0xff;
791 int acpi_table_add(const char *t)
793 static const char *dfl_id = "QEMUQEMU";
794 char buf[1024], *p, *f;
795 struct acpi_table_header acpi_hdr;
799 memset(&acpi_hdr, 0, sizeof(acpi_hdr));
801 if (get_param_value(buf, sizeof(buf), "sig", t)) {
802 strncpy(acpi_hdr.signature, buf, 4);
804 strncpy(acpi_hdr.signature, dfl_id, 4);
806 if (get_param_value(buf, sizeof(buf), "rev", t)) {
807 val = strtoul(buf, &p, 10);
808 if (val > 255 || *p != '\0')
813 acpi_hdr.revision = (int8_t)val;
815 if (get_param_value(buf, sizeof(buf), "oem_id", t)) {
816 strncpy(acpi_hdr.oem_id, buf, 6);
818 strncpy(acpi_hdr.oem_id, dfl_id, 6);
821 if (get_param_value(buf, sizeof(buf), "oem_table_id", t)) {
822 strncpy(acpi_hdr.oem_table_id, buf, 8);
824 strncpy(acpi_hdr.oem_table_id, dfl_id, 8);
827 if (get_param_value(buf, sizeof(buf), "oem_rev", t)) {
828 val = strtol(buf, &p, 10);
834 acpi_hdr.oem_revision = cpu_to_le32(val);
836 if (get_param_value(buf, sizeof(buf), "asl_compiler_id", t)) {
837 strncpy(acpi_hdr.asl_compiler_id, buf, 4);
839 strncpy(acpi_hdr.asl_compiler_id, dfl_id, 4);
842 if (get_param_value(buf, sizeof(buf), "asl_compiler_rev", t)) {
843 val = strtol(buf, &p, 10);
849 acpi_hdr.asl_compiler_revision = cpu_to_le32(val);
851 if (!get_param_value(buf, sizeof(buf), "data", t)) {
855 acpi_hdr.length = sizeof(acpi_hdr);
860 char *n = strchr(f, ':');
863 if(stat(f, &s) < 0) {
864 fprintf(stderr, "Can't stat file '%s': %s\n", f, strerror(errno));
867 acpi_hdr.length += s.st_size;
875 acpi_tables_len = sizeof(uint16_t);
876 acpi_tables = qemu_mallocz(acpi_tables_len);
878 p = acpi_tables + acpi_tables_len;
879 acpi_tables_len += sizeof(uint16_t) + acpi_hdr.length;
880 acpi_tables = qemu_realloc(acpi_tables, acpi_tables_len);
882 acpi_hdr.length = cpu_to_le32(acpi_hdr.length);
883 *(uint16_t*)p = acpi_hdr.length;
884 p += sizeof(uint16_t);
885 memcpy(p, &acpi_hdr, sizeof(acpi_hdr));
886 off = sizeof(acpi_hdr);
892 char *n = strchr(f, ':');
895 fd = open(f, O_RDONLY);
899 if(fstat(fd, &s) < 0) {
906 r = read(fd, p + off, s.st_size);
910 } else if ((r < 0 && errno != EINTR) || r == 0) {
922 ((struct acpi_table_header*)p)->checksum = acpi_checksum((uint8_t*)p, off);
923 /* increase number of tables */
924 (*(uint16_t*)acpi_tables) =
925 cpu_to_le32(le32_to_cpu(*(uint16_t*)acpi_tables) + 1);
929 qemu_free(acpi_tables);