rt-thread-official/libcpu/risc-v/virt64/plic.h

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2021-05-20     bigmagic     first version
 * 2021-10-20     bernard      fix s-mode issue
 */

#ifndef __PLIC_H__
#define __PLIC_H__

#include <rtconfig.h>
#include <rthw.h>

#define PLIC_PRIORITY_BASE  0x0
#define PLIC_PENDING_BASE   0x1000
#define PLIC_ENABLE_BASE    0x2000
#define PLIC_CONTEXT_BASE   0x200000

extern size_t plic_base;

#define VIRT_PLIC_BASE                  (plic_base)

#define PLIC_PRIORITY_OFFSET            (0x0)
#define PLIC_PENDING_OFFSET             (0x1000)

#define PLIC_ENABLE_STRIDE              0x80
#define PLIC_CONTEXT_STRIDE             0x1000

#ifndef RISCV_S_MODE
#define PLIC_MENABLE_OFFSET             (0x2000)
#define PLIC_MTHRESHOLD_OFFSET          (0x200000)
#define PLIC_MCLAIM_OFFSET              (0x200004)
#define PLIC_MCOMPLETE_OFFSET           (0x200004)

#define PLIC_ENABLE(hart)               (VIRT_PLIC_BASE + PLIC_MENABLE_OFFSET +     (hart * 2) * PLIC_ENABLE_STRIDE)
#define PLIC_THRESHOLD(hart)            (VIRT_PLIC_BASE + PLIC_MTHRESHOLD_OFFSET +  (hart * 2) * PLIC_CONTEXT_STRIDE)
#define PLIC_CLAIM(hart)                (VIRT_PLIC_BASE + PLIC_MCLAIM_OFFSET +      (hart * 2) * PLIC_CONTEXT_STRIDE)
#define PLIC_COMPLETE(hart)             (VIRT_PLIC_BASE + PLIC_MCOMPLETE_OFFSET +   (hart * 2) * PLIC_CONTEXT_STRIDE)

#else
#define PLIC_SENABLE_OFFSET             (0x2000   + PLIC_ENABLE_STRIDE)
#define PLIC_STHRESHOLD_OFFSET          (0x200000 + PLIC_CONTEXT_STRIDE)
#define PLIC_SCLAIM_OFFSET              (0x200004 + PLIC_CONTEXT_STRIDE)
#define PLIC_SCOMPLETE_OFFSET           (0x200004 + PLIC_CONTEXT_STRIDE)

#define PLIC_ENABLE(hart)               (VIRT_PLIC_BASE + PLIC_SENABLE_OFFSET +     (hart * 2) * PLIC_ENABLE_STRIDE)
#define PLIC_THRESHOLD(hart)            (VIRT_PLIC_BASE + PLIC_STHRESHOLD_OFFSET +  (hart * 2) * PLIC_CONTEXT_STRIDE)
#define PLIC_CLAIM(hart)                (VIRT_PLIC_BASE + PLIC_SCLAIM_OFFSET +      (hart * 2) * PLIC_CONTEXT_STRIDE)
#define PLIC_COMPLETE(hart)             (VIRT_PLIC_BASE + PLIC_SCOMPLETE_OFFSET +   (hart * 2) * PLIC_CONTEXT_STRIDE)
#endif

#define PLIC_PRIORITY(id)               (VIRT_PLIC_BASE + PLIC_PRIORITY_OFFSET + (id) * 4)
#define PLIC_PENDING(id)                (VIRT_PLIC_BASE + PLIC_PENDING_OFFSET + ((id) / 32))

#define WORD_CNT_BYTE (1024 / 8)

/* IRQ config in system, max 1024 (from 0 to 1023) */
#define CONFIG_IRQ_NR (128)
#define CONFIG_IRQ_WORD (CONFIG_IRQ_NR / 32)

void plic_set_priority(int irq, int priority);
void plic_irq_enable(int irq);
void plic_irq_disable(int irq);
void plic_set_threshold(int mthreshold);
int  plic_claim(void);
void plic_complete(int irq);

void plic_set_thresh(rt_uint32_t val);
void plic_set_ie(rt_uint32_t word_index,rt_uint32_t val);
void plic_init();
void plic_handle_irq(void);

#endif