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, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
22 #include "qemu-timer.h"
30 /* i82731AB (PIIX4) compatible power management function */
31 #define PM_FREQ 3579545
33 #define ACPI_DBG_IO_ADDR 0xb044
35 typedef struct PIIX4PMState {
43 int64_t tmr_overflow_time;
56 #define RSM_STS (1 << 15)
57 #define PWRBTN_STS (1 << 8)
58 #define RTC_EN (1 << 10)
59 #define PWRBTN_EN (1 << 8)
60 #define GBL_EN (1 << 5)
61 #define TMROF_EN (1 << 0)
63 #define SCI_EN (1 << 0)
65 #define SUS_EN (1 << 13)
67 #define ACPI_ENABLE 0xf1
68 #define ACPI_DISABLE 0xf0
70 #define SMBHSTSTS 0x00
71 #define SMBHSTCNT 0x02
72 #define SMBHSTCMD 0x03
73 #define SMBHSTADD 0x04
74 #define SMBHSTDAT0 0x05
75 #define SMBHSTDAT1 0x06
76 #define SMBBLKDAT 0x07
78 static PIIX4PMState *pm_state;
80 static uint32_t get_pmtmr(PIIX4PMState *s)
83 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
87 static int get_pmsts(PIIX4PMState *s)
92 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
93 if (d >= s->tmr_overflow_time)
98 static void pm_update_sci(PIIX4PMState *s)
100 int sci_level, pmsts;
103 pmsts = get_pmsts(s);
104 sci_level = (((pmsts & s->pmen) &
105 (RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0);
106 qemu_set_irq(s->irq, sci_level);
107 /* schedule a timer interruption if needed */
108 if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) {
109 expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ);
110 qemu_mod_timer(s->tmr_timer, expire_time);
112 qemu_del_timer(s->tmr_timer);
116 static void pm_tmr_timer(void *opaque)
118 PIIX4PMState *s = opaque;
122 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
124 PIIX4PMState *s = opaque;
131 pmsts = get_pmsts(s);
132 if (pmsts & val & TMROF_EN) {
133 /* if TMRSTS is reset, then compute the new overflow time */
134 d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
135 s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
148 s->pmcntrl = val & ~(SUS_EN);
150 /* change suspend type */
151 sus_typ = (val >> 10) & 7;
153 case 0: /* soft power off */
154 qemu_system_shutdown_request();
157 /* RSM_STS should be set on resume. Pretend that resume
158 was caused by power button */
159 s->pmsts |= (RSM_STS | PWRBTN_STS);
160 qemu_system_reset_request();
161 #if defined(TARGET_I386)
162 cmos_set_s3_resume();
174 printf("PM writew port=0x%04x val=0x%04x\n", addr, val);
178 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
180 PIIX4PMState *s = opaque;
199 printf("PM readw port=0x%04x val=0x%04x\n", addr, val);
204 static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
206 // PIIX4PMState *s = opaque;
209 printf("PM writel port=0x%04x val=0x%08x\n", addr, val);
213 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
215 PIIX4PMState *s = opaque;
228 printf("PM readl port=0x%04x val=0x%08x\n", addr, val);
233 static void pm_smi_writeb(void *opaque, uint32_t addr, uint32_t val)
235 PIIX4PMState *s = opaque;
238 printf("pm_smi_writeb addr=0x%x val=0x%02x\n", addr, val);
243 /* ACPI specs 3.0, 4.7.2.5 */
244 if (val == ACPI_ENABLE) {
245 s->pmcntrl |= SCI_EN;
246 } else if (val == ACPI_DISABLE) {
247 s->pmcntrl &= ~SCI_EN;
250 if (s->dev.config[0x5b] & (1 << 1)) {
251 cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
258 static uint32_t pm_smi_readb(void *opaque, uint32_t addr)
260 PIIX4PMState *s = opaque;
270 printf("pm_smi_readb addr=0x%x val=0x%02x\n", addr, val);
275 static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
278 printf("ACPI: DBG: 0x%08x\n", val);
282 static void smb_transaction(PIIX4PMState *s)
284 uint8_t prot = (s->smb_ctl >> 2) & 0x07;
285 uint8_t read = s->smb_addr & 0x01;
286 uint8_t cmd = s->smb_cmd;
287 uint8_t addr = s->smb_addr >> 1;
288 i2c_bus *bus = s->smbus;
291 printf("SMBus trans addr=0x%02x prot=0x%02x\n", addr, prot);
295 smbus_quick_command(bus, addr, read);
299 s->smb_data0 = smbus_receive_byte(bus, addr);
301 smbus_send_byte(bus, addr, cmd);
306 s->smb_data0 = smbus_read_byte(bus, addr, cmd);
308 smbus_write_byte(bus, addr, cmd, s->smb_data0);
314 val = smbus_read_word(bus, addr, cmd);
316 s->smb_data1 = val >> 8;
318 smbus_write_word(bus, addr, cmd, (s->smb_data1 << 8) | s->smb_data0);
323 s->smb_data0 = smbus_read_block(bus, addr, cmd, s->smb_data);
325 smbus_write_block(bus, addr, cmd, s->smb_data, s->smb_data0);
337 static void smb_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
339 PIIX4PMState *s = opaque;
342 printf("SMB writeb port=0x%04x val=0x%02x\n", addr, val);
367 s->smb_data[s->smb_index++] = val;
368 if (s->smb_index > 31)
376 static uint32_t smb_ioport_readb(void *opaque, uint32_t addr)
378 PIIX4PMState *s = opaque;
388 val = s->smb_ctl & 0x1f;
403 val = s->smb_data[s->smb_index++];
404 if (s->smb_index > 31)
412 printf("SMB readb port=0x%04x val=0x%02x\n", addr, val);
417 static void pm_io_space_update(PIIX4PMState *s)
421 if (s->dev.config[0x80] & 1) {
422 pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
423 pm_io_base &= 0xffc0;
425 /* XXX: need to improve memory and ioport allocation */
427 printf("PM: mapping to 0x%x\n", pm_io_base);
429 register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
430 register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
431 register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
432 register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
436 static void pm_write_config(PCIDevice *d,
437 uint32_t address, uint32_t val, int len)
439 pci_default_write_config(d, address, val, len);
441 pm_io_space_update((PIIX4PMState *)d);
444 static void pm_save(QEMUFile* f,void *opaque)
446 PIIX4PMState *s = opaque;
448 pci_device_save(&s->dev, f);
450 qemu_put_be16s(f, &s->pmsts);
451 qemu_put_be16s(f, &s->pmen);
452 qemu_put_be16s(f, &s->pmcntrl);
453 qemu_put_8s(f, &s->apmc);
454 qemu_put_8s(f, &s->apms);
455 qemu_put_timer(f, s->tmr_timer);
456 qemu_put_be64(f, s->tmr_overflow_time);
459 static int pm_load(QEMUFile* f,void* opaque,int version_id)
461 PIIX4PMState *s = opaque;
467 ret = pci_device_load(&s->dev, f);
471 qemu_get_be16s(f, &s->pmsts);
472 qemu_get_be16s(f, &s->pmen);
473 qemu_get_be16s(f, &s->pmcntrl);
474 qemu_get_8s(f, &s->apmc);
475 qemu_get_8s(f, &s->apms);
476 qemu_get_timer(f, s->tmr_timer);
477 s->tmr_overflow_time=qemu_get_be64(f);
479 pm_io_space_update(s);
484 static void piix4_reset(void *opaque)
486 PIIX4PMState *s = opaque;
487 uint8_t *pci_conf = s->dev.config;
495 i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
501 s = (PIIX4PMState *)pci_register_device(bus,
502 "PM", sizeof(PIIX4PMState),
503 devfn, NULL, pm_write_config);
505 pci_conf = s->dev.config;
506 pci_conf[0x00] = 0x86;
507 pci_conf[0x01] = 0x80;
508 pci_conf[0x02] = 0x13;
509 pci_conf[0x03] = 0x71;
510 pci_conf[0x06] = 0x80;
511 pci_conf[0x07] = 0x02;
512 pci_conf[0x08] = 0x03; // revision number
513 pci_conf[0x09] = 0x00;
514 pci_conf[0x0a] = 0x80; // other bridge device
515 pci_conf[0x0b] = 0x06; // bridge device
516 pci_conf[0x0e] = 0x00; // header_type
517 pci_conf[0x3d] = 0x01; // interrupt pin 1
519 pci_conf[0x40] = 0x01; /* PM io base read only bit */
521 register_ioport_write(0xb2, 2, 1, pm_smi_writeb, s);
522 register_ioport_read(0xb2, 2, 1, pm_smi_readb, s);
524 register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
527 /* Mark SMM as already inited to prevent SMM from running. KVM does not
528 * support SMM mode. */
529 pci_conf[0x5B] = 0x02;
532 /* XXX: which specification is used ? The i82731AB has different
534 pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
535 pci_conf[0x63] = 0x60;
536 pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
537 (serial_hds[1] != NULL ? 0x90 : 0);
539 pci_conf[0x90] = smb_io_base | 1;
540 pci_conf[0x91] = smb_io_base >> 8;
541 pci_conf[0xd2] = 0x09;
542 register_ioport_write(smb_io_base, 64, 1, smb_ioport_writeb, s);
543 register_ioport_read(smb_io_base, 64, 1, smb_ioport_readb, s);
545 s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
547 register_savevm("piix4_pm", 0, 1, pm_save, pm_load, s);
549 s->smbus = i2c_init_bus();
551 qemu_register_reset(piix4_reset, s);
556 #if defined(TARGET_I386)
557 void qemu_system_powerdown(void)
560 qemu_system_shutdown_request();
561 } else if (pm_state->pmen & PWRBTN_EN) {
562 pm_state->pmsts |= PWRBTN_EN;
563 pm_update_sci(pm_state);