hw/acpi_ich9.c - third_party/qemu - Git at Google

 /*
  * 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, see <http://www.gnu.org/licenses/>
  */
 /*
  *  Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
  *                     VA Linux Systems Japan K.K.
  *  Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
  *
  *  This is based on acpi.c.
  */
 #include "hw.h"
 #include "pc.h"
 #include "pci.h"
 #include "qemu-timer.h"
 #include "sysemu.h"
 #include "acpi.h"
 #include "kvm.h"

 #include "ich9.h"

 //#define DEBUG

 #ifdef DEBUG
 #define ICH9_DEBUG(fmt, ...) \
 do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0)
 #else
 #define ICH9_DEBUG(fmt, ...)    do { } while (0)
 #endif

 static void pm_ioport_write_fallback(void *opaque, uint32_t addr, int len,
                                      uint32_t val);
 static uint32_t pm_ioport_read_fallback(void *opaque, uint32_t addr, int len);

 static void pm_update_sci(ICH9LPCPMRegs *pm)
 {
     int sci_level, pm1a_sts;

     pm1a_sts = acpi_pm1_evt_get_sts(&pm->acpi_regs);

     sci_level = (((pm1a_sts & pm->acpi_regs.pm1.evt.en) &
                   (ACPI_BITMASK_RT_CLOCK_ENABLE |
                    ACPI_BITMASK_POWER_BUTTON_ENABLE |
                    ACPI_BITMASK_GLOBAL_LOCK_ENABLE |
                    ACPI_BITMASK_TIMER_ENABLE)) != 0);
     qemu_set_irq(pm->irq, sci_level);

     /* schedule a timer interruption if needed */
     acpi_pm_tmr_update(&pm->acpi_regs,
                        (pm->acpi_regs.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
                        !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
 }

 static void ich9_pm_update_sci_fn(ACPIREGS *regs)
 {
     ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs);
     pm_update_sci(pm);
 }

 static void pm_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
 {
     ICH9LPCPMRegs *pm = opaque;

     switch (addr & ICH9_PMIO_MASK) {
     case ICH9_PMIO_GPE0_STS ... (ICH9_PMIO_GPE0_STS + ICH9_PMIO_GPE0_LEN - 1):
         acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
         break;
     default:
         break;
     }

     ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
 }

 static uint32_t pm_ioport_readb(void *opaque, uint32_t addr)
 {
     ICH9LPCPMRegs *pm = opaque;
     uint32_t val = 0;

     switch (addr & ICH9_PMIO_MASK) {
     case ICH9_PMIO_GPE0_STS ... (ICH9_PMIO_GPE0_STS + ICH9_PMIO_GPE0_LEN - 1):
         val = acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
         break;
     default:
         val = 0;
         break;
     }
     ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
     return val;
 }

 static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
 {
     ICH9LPCPMRegs *pm = opaque;

     switch (addr & ICH9_PMIO_MASK) {
     case ICH9_PMIO_PM1_STS:
         acpi_pm1_evt_write_sts(&pm->acpi_regs, val);
         pm_update_sci(pm);
         break;
     case ICH9_PMIO_PM1_EN:
         pm->acpi_regs.pm1.evt.en = val;
         pm_update_sci(pm);
         break;
     case ICH9_PMIO_PM1_CNT:
         acpi_pm1_cnt_write(&pm->acpi_regs, val, 0);
         break;
     default:
         pm_ioport_write_fallback(opaque, addr, 2, val);
         break;
     }
     ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
 }

 static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
 {
     ICH9LPCPMRegs *pm = opaque;
     uint32_t val;

     switch (addr & ICH9_PMIO_MASK) {
     case ICH9_PMIO_PM1_STS:
         val = acpi_pm1_evt_get_sts(&pm->acpi_regs);
         break;
     case ICH9_PMIO_PM1_EN:
         val = pm->acpi_regs.pm1.evt.en;
         break;
     case ICH9_PMIO_PM1_CNT:
         val = pm->acpi_regs.pm1.cnt.cnt;
         break;
     default:
         val = pm_ioport_read_fallback(opaque, addr, 2);
         break;
     }
     ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
     return val;
 }

 static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
 {
     ICH9LPCPMRegs *pm = opaque;

     switch (addr & ICH9_PMIO_MASK) {
     case ICH9_PMIO_SMI_EN:
         pm->smi_en = val;
         break;
     default:
         pm_ioport_write_fallback(opaque, addr, 4, val);
         break;
     }
     ICH9_DEBUG("port=0x%04x val=0x%08x\n", addr, val);
 }

 static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
 {
     ICH9LPCPMRegs *pm = opaque;
     uint32_t val;

     switch (addr & ICH9_PMIO_MASK) {
     case ICH9_PMIO_PM1_TMR:
         val = acpi_pm_tmr_get(&pm->acpi_regs);
         break;
     case ICH9_PMIO_SMI_EN:
         val = pm->smi_en;
         break;

     default:
         val = pm_ioport_read_fallback(opaque, addr, 4);
         break;
     }
     ICH9_DEBUG("port=0x%04x val=0x%08x\n", addr, val);
     return val;
 }

 static void pm_ioport_write_fallback(void *opaque, uint32_t addr, int len,
                                      uint32_t val)
  {
     int subsize = (len == 4) ? 2 : 1;
     IOPortWriteFunc *ioport_write =
         (subsize == 2) ? pm_ioport_writew : pm_ioport_writeb;

     int i;

     for (i = 0; i < len; i += subsize) {
         ioport_write(opaque, addr, val);
         val >>= 8 * subsize;
     }
 }

 static uint32_t pm_ioport_read_fallback(void *opaque, uint32_t addr, int len)
 {
     int subsize = (len == 4) ? 2 : 1;
     IOPortReadFunc *ioport_read =
         (subsize == 2) ? pm_ioport_readw : pm_ioport_readb;

     uint32_t val;
     int i;

     val = 0;
     for (i = 0; i < len; i += subsize) {
         val <<= 8 * subsize;
         val |= ioport_read(opaque, addr);
     }

     return val;
 }

 void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base)
 {
     ICH9_DEBUG("to 0x%x\n", pm_io_base);

     assert((pm_io_base & ICH9_PMIO_MASK) == 0);

     if (pm->pm_io_base != 0) {
         isa_unassign_ioport(pm->pm_io_base, ICH9_PMIO_SIZE);
     }

     /* don't map at 0 */
     if (pm_io_base == 0) {
         return;
     }

     register_ioport_write(pm_io_base, ICH9_PMIO_SIZE, 1, pm_ioport_writeb, pm);
     register_ioport_read(pm_io_base, ICH9_PMIO_SIZE, 1, pm_ioport_readb, pm);
     register_ioport_write(pm_io_base, ICH9_PMIO_SIZE, 2, pm_ioport_writew, pm);
     register_ioport_read(pm_io_base, ICH9_PMIO_SIZE, 2, pm_ioport_readw, pm);
     register_ioport_write(pm_io_base, ICH9_PMIO_SIZE, 4, pm_ioport_writel, pm);
     register_ioport_read(pm_io_base, ICH9_PMIO_SIZE, 4, pm_ioport_readl, pm);

     pm->pm_io_base = pm_io_base;
     acpi_gpe_blk(&pm->acpi_regs, pm_io_base + ICH9_PMIO_GPE0_STS);
 }

 static int ich9_pm_post_load(void *opaque, int version_id)
 {
     ICH9LPCPMRegs *pm = opaque;
     uint32_t pm_io_base = pm->pm_io_base;
     pm->pm_io_base = 0;
     ich9_pm_iospace_update(pm, pm_io_base);
     return 0;
 }

 #define VMSTATE_GPE_ARRAY(_field, _state)                            \
  {                                                                   \
      .name       = (stringify(_field)),                              \
      .version_id = 0,                                                \
      .num        = ICH9_PMIO_GPE0_LEN,                               \
      .info       = &vmstate_info_uint8,                              \
      .size       = sizeof(uint8_t),                                  \
      .flags      = VMS_ARRAY | VMS_POINTER,                          \
      .offset     = vmstate_offset_pointer(_state, _field, uint8_t),  \
  }

 const VMStateDescription vmstate_ich9_pm = {
     .name = "ich9_pm",
     .version_id = 1,
     .minimum_version_id = 1,
     .minimum_version_id_old = 1,
     .post_load = ich9_pm_post_load,
     .fields = (VMStateField[]) {
         VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs),
         VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs),
         VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs),
         VMSTATE_TIMER(acpi_regs.tmr.timer, ICH9LPCPMRegs),
         VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs),
         VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs),
         VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
         VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
         VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
         VMSTATE_END_OF_LIST()
     }
 };

 static void pm_reset(void *opaque)
 {
     ICH9LPCPMRegs *pm = opaque;
     ich9_pm_iospace_update(pm, 0);

     acpi_pm1_evt_reset(&pm->acpi_regs);
     acpi_pm1_cnt_reset(&pm->acpi_regs);
     acpi_pm_tmr_reset(&pm->acpi_regs);
     acpi_gpe_reset(&pm->acpi_regs);

     if (kvm_enabled()) {
         /* Mark SMM as already inited to prevent SMM from running. KVM does not
          * support SMM mode. */
         pm->smi_en |= ICH9_PMIO_SMI_EN_APMC_EN;
     }

     pm_update_sci(pm);
 }

 static void pm_powerdown_req(Notifier *n, void *opaque)
 {
     ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier);

     acpi_pm1_evt_power_down(&pm->acpi_regs);
 }

 void ich9_pm_init(ICH9LPCPMRegs *pm, qemu_irq sci_irq, qemu_irq cmos_s3)
 {
     acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn);
     acpi_pm1_cnt_init(&pm->acpi_regs);
     acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);

     pm->irq = sci_irq;
     qemu_register_reset(pm_reset, pm);
     pm->powerdown_notifier.notify = pm_powerdown_req;
     qemu_register_powerdown_notifier(&pm->powerdown_notifier);
 }
	/*
	* 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, see <http://www.gnu.org/licenses/>
	*/
	/*
	* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
	* VA Linux Systems Japan K.K.
	* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
	*
	* This is based on acpi.c.
	*/
	#include "hw.h"
	#include "pc.h"
	#include "pci.h"
	#include "qemu-timer.h"
	#include "sysemu.h"
	#include "acpi.h"
	#include "kvm.h"

	#include "ich9.h"

	//#define DEBUG

	#ifdef DEBUG
	#define ICH9_DEBUG(fmt, ...) \
	do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0)
	#else
	#define ICH9_DEBUG(fmt, ...) do { } while (0)
	#endif

	static void pm_ioport_write_fallback(void *opaque, uint32_t addr, int len,
	uint32_t val);
	static uint32_t pm_ioport_read_fallback(void *opaque, uint32_t addr, int len);

	static void pm_update_sci(ICH9LPCPMRegs *pm)
	{
	int sci_level, pm1a_sts;

	pm1a_sts = acpi_pm1_evt_get_sts(&pm->acpi_regs);

	sci_level = (((pm1a_sts & pm->acpi_regs.pm1.evt.en) &
	(ACPI_BITMASK_RT_CLOCK_ENABLE \|
	ACPI_BITMASK_POWER_BUTTON_ENABLE \|
	ACPI_BITMASK_GLOBAL_LOCK_ENABLE \|
	ACPI_BITMASK_TIMER_ENABLE)) != 0);
	qemu_set_irq(pm->irq, sci_level);

	/* schedule a timer interruption if needed */
	acpi_pm_tmr_update(&pm->acpi_regs,
	(pm->acpi_regs.pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
	!(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
	}

	static void ich9_pm_update_sci_fn(ACPIREGS *regs)
	{
	ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs);
	pm_update_sci(pm);
	}

	static void pm_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
	{
	ICH9LPCPMRegs *pm = opaque;

	switch (addr & ICH9_PMIO_MASK) {
	case ICH9_PMIO_GPE0_STS ... (ICH9_PMIO_GPE0_STS + ICH9_PMIO_GPE0_LEN - 1):
	acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
	break;
	default:
	break;
	}

	ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
	}

	static uint32_t pm_ioport_readb(void *opaque, uint32_t addr)
	{
	ICH9LPCPMRegs *pm = opaque;
	uint32_t val = 0;

	switch (addr & ICH9_PMIO_MASK) {
	case ICH9_PMIO_GPE0_STS ... (ICH9_PMIO_GPE0_STS + ICH9_PMIO_GPE0_LEN - 1):
	val = acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
	break;
	default:
	val = 0;
	break;
	}
	ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
	return val;
	}

	static void pm_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
	{
	ICH9LPCPMRegs *pm = opaque;

	switch (addr & ICH9_PMIO_MASK) {
	case ICH9_PMIO_PM1_STS:
	acpi_pm1_evt_write_sts(&pm->acpi_regs, val);
	pm_update_sci(pm);
	break;
	case ICH9_PMIO_PM1_EN:
	pm->acpi_regs.pm1.evt.en = val;
	pm_update_sci(pm);
	break;
	case ICH9_PMIO_PM1_CNT:
	acpi_pm1_cnt_write(&pm->acpi_regs, val, 0);
	break;
	default:
	pm_ioport_write_fallback(opaque, addr, 2, val);
	break;
	}
	ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
	}

	static uint32_t pm_ioport_readw(void *opaque, uint32_t addr)
	{
	ICH9LPCPMRegs *pm = opaque;
	uint32_t val;

	switch (addr & ICH9_PMIO_MASK) {
	case ICH9_PMIO_PM1_STS:
	val = acpi_pm1_evt_get_sts(&pm->acpi_regs);
	break;
	case ICH9_PMIO_PM1_EN:
	val = pm->acpi_regs.pm1.evt.en;
	break;
	case ICH9_PMIO_PM1_CNT:
	val = pm->acpi_regs.pm1.cnt.cnt;
	break;
	default:
	val = pm_ioport_read_fallback(opaque, addr, 2);
	break;
	}
	ICH9_DEBUG("port=0x%04x val=0x%04x\n", addr, val);
	return val;
	}

	static void pm_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
	{
	ICH9LPCPMRegs *pm = opaque;

	switch (addr & ICH9_PMIO_MASK) {
	case ICH9_PMIO_SMI_EN:
	pm->smi_en = val;
	break;
	default:
	pm_ioport_write_fallback(opaque, addr, 4, val);
	break;
	}
	ICH9_DEBUG("port=0x%04x val=0x%08x\n", addr, val);
	}

	static uint32_t pm_ioport_readl(void *opaque, uint32_t addr)
	{
	ICH9LPCPMRegs *pm = opaque;
	uint32_t val;

	switch (addr & ICH9_PMIO_MASK) {
	case ICH9_PMIO_PM1_TMR:
	val = acpi_pm_tmr_get(&pm->acpi_regs);
	break;
	case ICH9_PMIO_SMI_EN:
	val = pm->smi_en;
	break;

	default:
	val = pm_ioport_read_fallback(opaque, addr, 4);
	break;
	}
	ICH9_DEBUG("port=0x%04x val=0x%08x\n", addr, val);
	return val;
	}

	static void pm_ioport_write_fallback(void *opaque, uint32_t addr, int len,
	uint32_t val)
	{
	int subsize = (len == 4) ? 2 : 1;
	IOPortWriteFunc *ioport_write =
	(subsize == 2) ? pm_ioport_writew : pm_ioport_writeb;

	int i;

	for (i = 0; i < len; i += subsize) {
	ioport_write(opaque, addr, val);
	val >>= 8 * subsize;
	}
	}

	static uint32_t pm_ioport_read_fallback(void *opaque, uint32_t addr, int len)
	{
	int subsize = (len == 4) ? 2 : 1;
	IOPortReadFunc *ioport_read =
	(subsize == 2) ? pm_ioport_readw : pm_ioport_readb;

	uint32_t val;
	int i;

	val = 0;
	for (i = 0; i < len; i += subsize) {
	val <<= 8 * subsize;
	val \|= ioport_read(opaque, addr);
	}

	return val;
	}

	void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base)
	{
	ICH9_DEBUG("to 0x%x\n", pm_io_base);

	assert((pm_io_base & ICH9_PMIO_MASK) == 0);

	if (pm->pm_io_base != 0) {
	isa_unassign_ioport(pm->pm_io_base, ICH9_PMIO_SIZE);
	}

	/* don't map at 0 */
	if (pm_io_base == 0) {
	return;
	}

	register_ioport_write(pm_io_base, ICH9_PMIO_SIZE, 1, pm_ioport_writeb, pm);
	register_ioport_read(pm_io_base, ICH9_PMIO_SIZE, 1, pm_ioport_readb, pm);
	register_ioport_write(pm_io_base, ICH9_PMIO_SIZE, 2, pm_ioport_writew, pm);
	register_ioport_read(pm_io_base, ICH9_PMIO_SIZE, 2, pm_ioport_readw, pm);
	register_ioport_write(pm_io_base, ICH9_PMIO_SIZE, 4, pm_ioport_writel, pm);
	register_ioport_read(pm_io_base, ICH9_PMIO_SIZE, 4, pm_ioport_readl, pm);

	pm->pm_io_base = pm_io_base;
	acpi_gpe_blk(&pm->acpi_regs, pm_io_base + ICH9_PMIO_GPE0_STS);
	}

	static int ich9_pm_post_load(void *opaque, int version_id)
	{
	ICH9LPCPMRegs *pm = opaque;
	uint32_t pm_io_base = pm->pm_io_base;
	pm->pm_io_base = 0;
	ich9_pm_iospace_update(pm, pm_io_base);
	return 0;
	}

	#define VMSTATE_GPE_ARRAY(_field, _state) \
	{ \
	.name = (stringify(_field)), \
	.version_id = 0, \
	.num = ICH9_PMIO_GPE0_LEN, \
	.info = &vmstate_info_uint8, \
	.size = sizeof(uint8_t), \
	.flags = VMS_ARRAY \| VMS_POINTER, \
	.offset = vmstate_offset_pointer(_state, _field, uint8_t), \
	}

	const VMStateDescription vmstate_ich9_pm = {
	.name = "ich9_pm",
	.version_id = 1,
	.minimum_version_id = 1,
	.minimum_version_id_old = 1,
	.post_load = ich9_pm_post_load,
	.fields = (VMStateField[]) {
	VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs),
	VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs),
	VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs),
	VMSTATE_TIMER(acpi_regs.tmr.timer, ICH9LPCPMRegs),
	VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs),
	VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs),
	VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
	VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
	VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
	VMSTATE_END_OF_LIST()
	}
	};

	static void pm_reset(void *opaque)
	{
	ICH9LPCPMRegs *pm = opaque;
	ich9_pm_iospace_update(pm, 0);

	acpi_pm1_evt_reset(&pm->acpi_regs);
	acpi_pm1_cnt_reset(&pm->acpi_regs);
	acpi_pm_tmr_reset(&pm->acpi_regs);
	acpi_gpe_reset(&pm->acpi_regs);

	if (kvm_enabled()) {
	/* Mark SMM as already inited to prevent SMM from running. KVM does not
	* support SMM mode. */
	pm->smi_en \|= ICH9_PMIO_SMI_EN_APMC_EN;
	}

	pm_update_sci(pm);
	}

	static void pm_powerdown_req(Notifier n, void opaque)
	{
	ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier);

	acpi_pm1_evt_power_down(&pm->acpi_regs);
	}

	void ich9_pm_init(ICH9LPCPMRegs *pm, qemu_irq sci_irq, qemu_irq cmos_s3)
	{
	acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn);
	acpi_pm1_cnt_init(&pm->acpi_regs);
	acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);

	pm->irq = sci_irq;
	qemu_register_reset(pm_reset, pm);
	pm->powerdown_notifier.notify = pm_powerdown_req;
	qemu_register_powerdown_notifier(&pm->powerdown_notifier);
	}