hw/acpi_ich9.c - qemu - Git at Google

 /*
  * ACPI implementation
  *
  * Copyright (c) 2006 Fabrice Bellard
  * 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.
  *
  * 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/>
  *
  * Contributions after 2012-01-13 are licensed under the terms of the
  * GNU GPL, version 2 or (at your option) any later version.
  */
 #include "hw.h"
 #include "pc.h"
 #include "pci/pci.h"
 #include "qemu-timer.h"
 #include "sysemu.h"
 #include "acpi.h"
 #include "kvm.h"
 #include "exec/address-spaces.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_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 uint64_t ich9_gpe_readb(void *opaque, hwaddr addr, unsigned width)
 {
     ICH9LPCPMRegs *pm = opaque;
     return acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
 }

 static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
                             unsigned width)
 {
     ICH9LPCPMRegs *pm = opaque;
     acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
 }

 static const MemoryRegionOps ich9_gpe_ops = {
     .read = ich9_gpe_readb,
     .write = ich9_gpe_writeb,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
     .impl.min_access_size = 1,
     .impl.max_access_size = 1,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static uint64_t ich9_smi_readl(void *opaque, hwaddr addr, unsigned width)
 {
     ICH9LPCPMRegs *pm = opaque;
     switch (addr) {
     case 0:
         return pm->smi_en;
     case 4:
         return pm->smi_sts;
     default:
         return 0;
     }
 }

 static void ich9_smi_writel(void *opaque, hwaddr addr, uint64_t val,
                             unsigned width)
 {
     ICH9LPCPMRegs *pm = opaque;
     switch (addr) {
     case 0:
         pm->smi_en = val;
         break;
     }
 }

 static const MemoryRegionOps ich9_smi_ops = {
     .read = ich9_smi_readl,
     .write = ich9_smi_writel,
     .valid.min_access_size = 4,
     .valid.max_access_size = 4,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 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);

     pm->pm_io_base = pm_io_base;
     memory_region_transaction_begin();
     memory_region_set_enabled(&pm->io, pm->pm_io_base != 0);
     memory_region_set_address(&pm->io, pm->pm_io_base);
     memory_region_transaction_commit();
 }

 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)
 {
     memory_region_init(&pm->io, "ich9-pm", ICH9_PMIO_SIZE);
     memory_region_set_enabled(&pm->io, false);
     memory_region_add_subregion(get_system_io(), 0, &pm->io);

     acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
     acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
     acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io);

     acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
     memory_region_init_io(&pm->io_gpe, &ich9_gpe_ops, pm, "apci-gpe0",
                           ICH9_PMIO_GPE0_LEN);
     memory_region_add_subregion(&pm->io, ICH9_PMIO_GPE0_STS, &pm->io_gpe);

     memory_region_init_io(&pm->io_smi, &ich9_smi_ops, pm, "apci-smi",
                           8);
     memory_region_add_subregion(&pm->io, ICH9_PMIO_SMI_EN, &pm->io_smi);

     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
	* 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.
	*
	* 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/>
	*
	* Contributions after 2012-01-13 are licensed under the terms of the
	* GNU GPL, version 2 or (at your option) any later version.
	*/
	#include "hw.h"
	#include "pc.h"
	#include "pci/pci.h"
	#include "qemu-timer.h"
	#include "sysemu.h"
	#include "acpi.h"
	#include "kvm.h"
	#include "exec/address-spaces.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_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 uint64_t ich9_gpe_readb(void *opaque, hwaddr addr, unsigned width)
	{
	ICH9LPCPMRegs *pm = opaque;
	return acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
	}

	static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
	unsigned width)
	{
	ICH9LPCPMRegs *pm = opaque;
	acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
	}

	static const MemoryRegionOps ich9_gpe_ops = {
	.read = ich9_gpe_readb,
	.write = ich9_gpe_writeb,
	.valid.min_access_size = 1,
	.valid.max_access_size = 4,
	.impl.min_access_size = 1,
	.impl.max_access_size = 1,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static uint64_t ich9_smi_readl(void *opaque, hwaddr addr, unsigned width)
	{
	ICH9LPCPMRegs *pm = opaque;
	switch (addr) {
	case 0:
	return pm->smi_en;
	case 4:
	return pm->smi_sts;
	default:
	return 0;
	}
	}

	static void ich9_smi_writel(void *opaque, hwaddr addr, uint64_t val,
	unsigned width)
	{
	ICH9LPCPMRegs *pm = opaque;
	switch (addr) {
	case 0:
	pm->smi_en = val;
	break;
	}
	}

	static const MemoryRegionOps ich9_smi_ops = {
	.read = ich9_smi_readl,
	.write = ich9_smi_writel,
	.valid.min_access_size = 4,
	.valid.max_access_size = 4,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	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);

	pm->pm_io_base = pm_io_base;
	memory_region_transaction_begin();
	memory_region_set_enabled(&pm->io, pm->pm_io_base != 0);
	memory_region_set_address(&pm->io, pm->pm_io_base);
	memory_region_transaction_commit();
	}

	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)
	{
	memory_region_init(&pm->io, "ich9-pm", ICH9_PMIO_SIZE);
	memory_region_set_enabled(&pm->io, false);
	memory_region_add_subregion(get_system_io(), 0, &pm->io);

	acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
	acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
	acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io);

	acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
	memory_region_init_io(&pm->io_gpe, &ich9_gpe_ops, pm, "apci-gpe0",
	ICH9_PMIO_GPE0_LEN);
	memory_region_add_subregion(&pm->io, ICH9_PMIO_GPE0_STS, &pm->io_gpe);

	memory_region_init_io(&pm->io_smi, &ich9_smi_ops, pm, "apci-smi",
	8);
	memory_region_add_subregion(&pm->io, ICH9_PMIO_SMI_EN, &pm->io_smi);

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