/*
 * SiFive PLIC (Platform Level Interrupt Controller) interface
 *
 * Copyright (c) 2017 SiFive, Inc.
 *
 * This provides a RISC-V PLIC device
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2 or later, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef HW_SIFIVE_PLIC_H
#define HW_SIFIVE_PLIC_H

#include "hw/irq.h"

#define TYPE_SIFIVE_PLIC "riscv.sifive.plic"

#define SIFIVE_PLIC(obj) \
    OBJECT_CHECK(SiFivePLICState, (obj), TYPE_SIFIVE_PLIC)

typedef enum PLICMode {
    PLICMode_U,
    PLICMode_S,
    PLICMode_H,
    PLICMode_M
} PLICMode;

typedef struct PLICAddr {
    uint32_t addrid;
    uint32_t hartid;
    PLICMode mode;
} PLICAddr;

typedef struct SiFivePLICState {
    /*< private >*/
    SysBusDevice parent_obj;

    /*< public >*/
    MemoryRegion mmio;
    uint32_t num_addrs;
    uint32_t bitfield_words;
    PLICAddr *addr_config;
    uint32_t *source_priority;
    uint32_t *target_priority;
    uint32_t *pending;
    uint32_t *claimed;
    uint32_t *enable;
    QemuMutex lock;

    /* config */
    char *hart_config;
    uint32_t num_sources;
    uint32_t num_priorities;
    uint32_t priority_base;
    uint32_t pending_base;
    uint32_t enable_base;
    uint32_t enable_stride;
    uint32_t context_base;
    uint32_t context_stride;
    uint32_t aperture_size;
} SiFivePLICState;

void sifive_plic_raise_irq(SiFivePLICState *plic, uint32_t irq);
void sifive_plic_lower_irq(SiFivePLICState *plic, uint32_t irq);

DeviceState *sifive_plic_create(hwaddr addr, char *hart_config,
    uint32_t num_sources, uint32_t num_priorities,
    uint32_t priority_base, uint32_t pending_base,
    uint32_t enable_base, uint32_t enable_stride,
    uint32_t context_base, uint32_t context_stride,
    uint32_t aperture_size);

#endif