qemu/include/hw/acpi/ich9.h
Paulo Alcantara 920557971b ich9: add TCO interface emulation
This interface provides some registers within a 32-byte range and can be
acessed through PCI-to-LPC bridge interface (PMBASE + 0x60).

It's commonly used as a watchdog timer to detect system lockups through
SMIs that are generated -- if TCO_EN bit is set -- on every timeout. If
NO_REBOOT bit is not set in GCS (General Control and Status register),
the system will be resetted upon second timeout if TCO_RLD register
wasn't previously written to prevent timeout.

This patch adds support to TCO watchdog logic and few other features
like mapping NMIs to SMIs (NMI2SMI_EN bit), system intruder detection,
etc. are not implemented yet.

Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-07-07 13:12:22 +03:00

81 lines
2.5 KiB
C

/*
* QEMU GMCH/ICH9 LPC PM Emulation
*
* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* 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/>
*/
#ifndef HW_ACPI_ICH9_H
#define HW_ACPI_ICH9_H
#include "hw/acpi/acpi.h"
#include "hw/acpi/cpu_hotplug.h"
#include "hw/acpi/memory_hotplug.h"
#include "hw/acpi/acpi_dev_interface.h"
#include "hw/acpi/tco.h"
typedef struct ICH9LPCPMRegs {
/*
* In ich9 spec says that pm1_cnt register is 32bit width and
* that the upper 16bits are reserved and unused.
* PM1a_CNT_BLK = 2 in FADT so it is defined as uint16_t.
*/
ACPIREGS acpi_regs;
MemoryRegion io;
MemoryRegion io_gpe;
MemoryRegion io_smi;
uint32_t smi_en;
uint32_t smi_en_wmask;
uint32_t smi_sts;
qemu_irq irq; /* SCI */
uint32_t pm_io_base;
Notifier powerdown_notifier;
AcpiCpuHotplug gpe_cpu;
MemHotplugState acpi_memory_hotplug;
uint8_t disable_s3;
uint8_t disable_s4;
uint8_t s4_val;
uint8_t smm_enabled;
bool enable_tco;
TCOIORegs tco_regs;
} ICH9LPCPMRegs;
void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
bool smm_enabled,
bool enable_tco,
qemu_irq sci_irq);
void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base);
extern const VMStateDescription vmstate_ich9_pm;
void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp);
void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp);
void ich9_pm_device_unplug_request_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
Error **errp);
void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
Error **errp);
void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
#endif /* HW_ACPI_ICH9_H */