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qemu/hw/acpi.c

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/*
* ACPI implementation
*
* Copyright (c) 2006 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "vl.h"
//#define DEBUG
/* i82731AB (PIIX4) compatible power management function */
#define PM_FREQ 3579545
#define ACPI_DBG_IO_ADDR 0xb044
typedef struct PIIX4PMState {
PCIDevice dev;
uint16_t pmsts;
uint16_t pmen;
uint16_t pmcntrl;
uint8_t apmc;
uint8_t apms;
QEMUTimer *tmr_timer;
int64_t tmr_overflow_time;
} PIIX4PMState;
#define RTC_EN (1 << 10)
#define PWRBTN_EN (1 << 8)
#define GBL_EN (1 << 5)
#define TMROF_EN (1 << 0)
#define SCI_EN (1 << 0)
#define SUS_EN (1 << 13)
static uint32_t get_pmtmr(PIIX4PMState *s)
{
uint32_t d;
d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
return d & 0xffffff;
}
static int get_pmsts(PIIX4PMState *s)
{
int64_t d;
int pmsts;
pmsts = s->pmsts;
d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
if (d >= s->tmr_overflow_time)
s->pmsts |= TMROF_EN;
return pmsts;
}
static void pm_update_sci(PIIX4PMState *s)
{
int sci_level, pmsts;
int64_t expire_time;
pmsts = get_pmsts(s);
sci_level = (((pmsts & s->pmen) &
(RTC_EN | PWRBTN_EN | GBL_EN | TMROF_EN)) != 0);
pci_set_irq(&s->dev, 0, sci_level);
/* schedule a timer interruption if needed */
if ((s->pmen & TMROF_EN) && !(pmsts & TMROF_EN)) {
expire_time = muldiv64(s->tmr_overflow_time, ticks_per_sec, PM_FREQ);
qemu_mod_timer(s->tmr_timer, expire_time);
} else {
qemu_del_timer(s->tmr_timer);
}
}
static void pm_tmr_timer(void *opaque)
{
PIIX4PMState *s = opaque;
pm_update_sci(s);
}
static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
{
PIIX4PMState *s = opaque;
addr &= 0x3f;
switch(addr) {
case 0x00:
{
int64_t d;
int pmsts;
pmsts = get_pmsts(s);
if (pmsts & val & TMROF_EN) {
/* if TMRSTS is reset, then compute the new overflow time */
d = muldiv64(qemu_get_clock(vm_clock), PM_FREQ, ticks_per_sec);
s->tmr_overflow_time = (d + 0x800000LL) & ~0x7fffffLL;
}
s->pmsts &= ~val;
pm_update_sci(s);
}
break;
case 0x02:
s->pmen = val;
pm_update_sci(s);
break;
case 0x04:
{
int sus_typ;
s->pmcntrl = val & ~(SUS_EN);
if (val & SUS_EN) {
/* change suspend type */
sus_typ = (val >> 10) & 3;
switch(sus_typ) {
case 0: /* soft power off */
qemu_system_shutdown_request();
break;
default:
break;
}
}
}
break;
default:
break;
}
#ifdef DEBUG
printf("PM writew port=0x%04x val=0x%04x\n", addr, val);
#endif
}
static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
{
PIIX4PMState *s = opaque;
uint32_t val;
addr &= 0x3f;
switch(addr) {
case 0x00:
val = get_pmsts(s);
break;
case 0x02:
val = s->pmen;
break;
case 0x04:
val = s->pmcntrl;
break;
default:
val = 0;
break;
}
#ifdef DEBUG
printf("PM readw port=0x%04x val=0x%04x\n", addr, val);
#endif
return val;
}
static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
{
// PIIX4PMState *s = opaque;
addr &= 0x3f;
#ifdef DEBUG
printf("PM writel port=0x%04x val=0x%08x\n", addr, val);
#endif
}
static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
{
PIIX4PMState *s = opaque;
uint32_t val;
addr &= 0x3f;
switch(addr) {
case 0x08:
val = get_pmtmr(s);
break;
default:
val = 0;
break;
}
#ifdef DEBUG
printf("PM readl port=0x%04x val=0x%08x\n", addr, val);
#endif
return val;
}
static void pm_smi_writeb(void *opaque, uint32_t addr, uint32_t val)
{
PIIX4PMState *s = opaque;
addr &= 1;
#ifdef DEBUG
printf("pm_smi_writeb addr=0x%x val=0x%02x\n", addr, val);
#endif
if (addr == 0) {
s->apmc = val;
if (s->dev.config[0x5b] & (1 << 1)) {
cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
}
} else {
s->apms = val;
}
}
static uint32_t pm_smi_readb(void *opaque, uint32_t addr)
{
PIIX4PMState *s = opaque;
uint32_t val;
addr &= 1;
if (addr == 0) {
val = s->apmc;
} else {
val = s->apms;
}
#ifdef DEBUG
printf("pm_smi_readb addr=0x%x val=0x%02x\n", addr, val);
#endif
return val;
}
static void acpi_dbg_writel(void *opaque, uint32_t addr, uint32_t val)
{
#if defined(DEBUG)
printf("ACPI: DBG: 0x%08x\n", val);
#endif
}
static void pm_io_space_update(PIIX4PMState *s)
{
uint32_t pm_io_base;
if (s->dev.config[0x80] & 1) {
pm_io_base = le32_to_cpu(*(uint32_t *)(s->dev.config + 0x40));
pm_io_base &= 0xfffe;
/* XXX: need to improve memory and ioport allocation */
#if defined(DEBUG)
printf("PM: mapping to 0x%x\n", pm_io_base);
#endif
register_ioport_write(pm_io_base, 64, 2, pm_ioport_writew, s);
register_ioport_read(pm_io_base, 64, 2, pm_ioport_readw, s);
register_ioport_write(pm_io_base, 64, 4, pm_ioport_writel, s);
register_ioport_read(pm_io_base, 64, 4, pm_ioport_readl, s);
}
}
static void pm_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
pci_default_write_config(d, address, val, len);
if (address == 0x80)
pm_io_space_update((PIIX4PMState *)d);
}
static void pm_save(QEMUFile* f,void *opaque)
{
PIIX4PMState *s = opaque;
pci_device_save(&s->dev, f);
qemu_put_be16s(f, &s->pmsts);
qemu_put_be16s(f, &s->pmen);
qemu_put_be16s(f, &s->pmcntrl);
qemu_put_8s(f, &s->apmc);
qemu_put_8s(f, &s->apms);
qemu_put_timer(f, s->tmr_timer);
qemu_put_be64s(f, &s->tmr_overflow_time);
}
static int pm_load(QEMUFile* f,void* opaque,int version_id)
{
PIIX4PMState *s = opaque;
int ret;
if (version_id > 1)
return -EINVAL;
ret = pci_device_load(&s->dev, f);
if (ret < 0)
return ret;
qemu_get_be16s(f, &s->pmsts);
qemu_get_be16s(f, &s->pmen);
qemu_get_be16s(f, &s->pmcntrl);
qemu_get_8s(f, &s->apmc);
qemu_get_8s(f, &s->apms);
qemu_get_timer(f, s->tmr_timer);
qemu_get_be64s(f, &s->tmr_overflow_time);
pm_io_space_update(s);
return 0;
}
void piix4_pm_init(PCIBus *bus, int devfn)
{
PIIX4PMState *s;
uint8_t *pci_conf;
s = (PIIX4PMState *)pci_register_device(bus,
"PM", sizeof(PIIX4PMState),
devfn, NULL, pm_write_config);
pci_conf = s->dev.config;
pci_conf[0x00] = 0x86;
pci_conf[0x01] = 0x80;
pci_conf[0x02] = 0x13;
pci_conf[0x03] = 0x71;
pci_conf[0x08] = 0x00; // revision number
pci_conf[0x09] = 0x00;
pci_conf[0x0a] = 0x80; // other bridge device
pci_conf[0x0b] = 0x06; // bridge device
pci_conf[0x0e] = 0x00; // header_type
pci_conf[0x3d] = 0x01; // interrupt pin 1
pci_conf[0x40] = 0x01; /* PM io base read only bit */
register_ioport_write(0xb2, 2, 1, pm_smi_writeb, s);
register_ioport_read(0xb2, 2, 1, pm_smi_readb, s);
register_ioport_write(ACPI_DBG_IO_ADDR, 4, 4, acpi_dbg_writel, s);
/* XXX: which specification is used ? The i82731AB has different
mappings */
pci_conf[0x5f] = (parallel_hds[0] != NULL ? 0x80 : 0) | 0x10;
pci_conf[0x63] = 0x60;
pci_conf[0x67] = (serial_hds[0] != NULL ? 0x08 : 0) |
(serial_hds[1] != NULL ? 0x90 : 0);
s->tmr_timer = qemu_new_timer(vm_clock, pm_tmr_timer, s);
register_savevm("piix4_pm", 0, 1, pm_save, pm_load, s);
}
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