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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
#include "plic.h"
#include <stddef.h>
irq_callback callbacks[MAX_CALLBACK_NUM];
void plic_irq_enable(int irqno)
{
int hart = riscv_get_core();
*(uint32_t*)PLIC_MENABLE(hart) = (*(uint32_t*)PLIC_MENABLE(hart) | (1 << irqno));
}
void plic_irq_disable(int irqno)
{
int hart = riscv_get_core();
*(uint32_t*)PLIC_MENABLE(hart) = (*(uint32_t*)PLIC_MENABLE(hart) & (~(1 << irqno)));
}
void plic_prio_set(int irqno, int prio)
{
PLIC_SET_PRIO(irqno, prio);
}
int plic_prio_get(int irqno)
{
return PLIC_GET_PRIO(irqno);
}
int plic_register_callback(int irqno, irq_callback callback)
{
if (!(irqno >= 0 && irqno < MAX_CALLBACK_NUM))
return -1;
callbacks[irqno] = callback;
return 0;
}
int plic_unregister_callback(int irqno)
{
return plic_register_callback(irqno, NULL);
}
int plic_init(void)
{
for (int i = 0; i < MAX_CALLBACK_NUM; i++)
callbacks[i] = NULL;
return 0;
}
int plic_claim(void)
{
int hart = riscv_get_core();
return (*(uint32_t*)PLIC_MCLAIM(hart));
}
void plic_complete(int irqno)
{
int hart = riscv_get_core();
*(uint32_t*)(PLIC_MCOMPLETE(hart)) = (uint32_t)irqno;
}
int plic_irq_intr(void)
{
int ret = -1;
int irqno = plic_claim();
if (callbacks[irqno] != NULL)
ret = (callbacks[irqno])(irqno);
plic_complete(irqno);
return ret;
}
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