lib: utils/timer: Add ACLINT MTIMER library

We add common ACLINT MTIMER library similar to the CLINT library
so that OpenSBI platforms can use it.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Xiang W <wxjstz@126.com>
This commit is contained in:
Anup Patel
2021-05-20 11:01:57 +05:30
committed by Anup Patel
parent 11c345f14a
commit 4519e29c51
3 changed files with 222 additions and 0 deletions

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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __TIMER_ACLINT_MTIMER_H__
#define __TIMER_ACLINT_MTIMER_H__
#include <sbi/sbi_types.h>
#define ACLINT_MTIMER_ALIGN 0x1000
#define ACLINT_MTIMER_SIZE 0x8000
#define ACLINT_MTIMER_MAX_HARTS 4095
#define CLINT_MTIMER_OFFSET 0x4000
struct aclint_mtimer_data {
/* Public details */
unsigned long addr;
unsigned long size;
u32 first_hartid;
u32 hart_count;
bool has_64bit_mmio;
/* Private details (initialized and used by ACLINT MTIMER library) */
struct aclint_mtimer_data *time_delta_reference;
unsigned long time_delta_computed;
u64 time_delta;
u64 (*time_rd)(volatile u64 *addr);
void (*time_wr)(bool timecmp, u64 value, volatile u64 *addr);
};
int aclint_mtimer_warm_init(void);
int aclint_mtimer_cold_init(struct aclint_mtimer_data *mt,
struct aclint_mtimer_data *reference);
#endif