/*
 *  IOAPIC emulation logic - internal interfaces
 *
 *  Copyright (c) 2004-2005 Fabrice Bellard
 *  Copyright (c) 2009      Xiantao Zhang, Intel
 *  Copyright (c) 2011 Jan Kiszka, Siemens AG
 *
 * 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 QEMU_IOAPIC_INTERNAL_H
#define QEMU_IOAPIC_INTERNAL_H

#include "hw/hw.h"
#include "exec/memory.h"
#include "hw/sysbus.h"
#include "qemu/notify.h"

#define MAX_IOAPICS                     1

#define IOAPIC_LVT_DEST_SHIFT           56
#define IOAPIC_LVT_DEST_IDX_SHIFT       48
#define IOAPIC_LVT_MASKED_SHIFT         16
#define IOAPIC_LVT_TRIGGER_MODE_SHIFT   15
#define IOAPIC_LVT_REMOTE_IRR_SHIFT     14
#define IOAPIC_LVT_POLARITY_SHIFT       13
#define IOAPIC_LVT_DELIV_STATUS_SHIFT   12
#define IOAPIC_LVT_DEST_MODE_SHIFT      11
#define IOAPIC_LVT_DELIV_MODE_SHIFT     8

#define IOAPIC_LVT_MASKED               (1 << IOAPIC_LVT_MASKED_SHIFT)
#define IOAPIC_LVT_TRIGGER_MODE         (1 << IOAPIC_LVT_TRIGGER_MODE_SHIFT)
#define IOAPIC_LVT_REMOTE_IRR           (1 << IOAPIC_LVT_REMOTE_IRR_SHIFT)
#define IOAPIC_LVT_POLARITY             (1 << IOAPIC_LVT_POLARITY_SHIFT)
#define IOAPIC_LVT_DELIV_STATUS         (1 << IOAPIC_LVT_DELIV_STATUS_SHIFT)
#define IOAPIC_LVT_DEST_MODE            (1 << IOAPIC_LVT_DEST_MODE_SHIFT)
#define IOAPIC_LVT_DELIV_MODE           (7 << IOAPIC_LVT_DELIV_MODE_SHIFT)

/* Bits that are read-only for IOAPIC entry */
#define IOAPIC_RO_BITS                  (IOAPIC_LVT_REMOTE_IRR | \
                                         IOAPIC_LVT_DELIV_STATUS)
#define IOAPIC_RW_BITS                  (~(uint64_t)IOAPIC_RO_BITS)

#define IOAPIC_TRIGGER_EDGE             0
#define IOAPIC_TRIGGER_LEVEL            1

/*io{apic,sapic} delivery mode*/
#define IOAPIC_DM_FIXED                 0x0
#define IOAPIC_DM_LOWEST_PRIORITY       0x1
#define IOAPIC_DM_PMI                   0x2
#define IOAPIC_DM_NMI                   0x4
#define IOAPIC_DM_INIT                  0x5
#define IOAPIC_DM_SIPI                  0x6
#define IOAPIC_DM_EXTINT                0x7
#define IOAPIC_DM_MASK                  0x7

#define IOAPIC_VECTOR_MASK              0xff

#define IOAPIC_IOREGSEL                 0x00
#define IOAPIC_IOWIN                    0x10
#define IOAPIC_EOI                      0x40

#define IOAPIC_REG_ID                   0x00
#define IOAPIC_REG_VER                  0x01
#define IOAPIC_REG_ARB                  0x02
#define IOAPIC_REG_REDTBL_BASE          0x10
#define IOAPIC_ID                       0x00

#define IOAPIC_ID_SHIFT                 24
#define IOAPIC_ID_MASK                  0xf

#define IOAPIC_VER_ENTRIES_SHIFT        16

typedef struct IOAPICCommonState IOAPICCommonState;

#define TYPE_IOAPIC_COMMON "ioapic-common"
#define IOAPIC_COMMON(obj) \
     OBJECT_CHECK(IOAPICCommonState, (obj), TYPE_IOAPIC_COMMON)
#define IOAPIC_COMMON_CLASS(klass) \
     OBJECT_CLASS_CHECK(IOAPICCommonClass, (klass), TYPE_IOAPIC_COMMON)
#define IOAPIC_COMMON_GET_CLASS(obj) \
     OBJECT_GET_CLASS(IOAPICCommonClass, (obj), TYPE_IOAPIC_COMMON)

typedef struct IOAPICCommonClass {
    SysBusDeviceClass parent_class;

    DeviceRealize realize;
    DeviceUnrealize unrealize;
    void (*pre_save)(IOAPICCommonState *s);
    void (*post_load)(IOAPICCommonState *s);
} IOAPICCommonClass;

struct IOAPICCommonState {
    SysBusDevice busdev;
    MemoryRegion io_memory;
    uint8_t id;
    uint8_t ioregsel;
    uint32_t irr;
    uint64_t ioredtbl[IOAPIC_NUM_PINS];
    Notifier machine_done;
    uint8_t version;
    uint64_t irq_count[IOAPIC_NUM_PINS];
    int irq_level[IOAPIC_NUM_PINS];
    int irq_eoi[IOAPIC_NUM_PINS];
    QEMUTimer *delayed_ioapic_service_timer;
};

void ioapic_reset_common(DeviceState *dev);

void ioapic_print_redtbl(Monitor *mon, IOAPICCommonState *s);
void ioapic_stat_update_irq(IOAPICCommonState *s, int irq, int level);

#endif /* QEMU_IOAPIC_INTERNAL_H */
