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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-09-06 勤为本 first version
*/
// 一些常用的、共用的接口
#ifndef __LOONGSON_PUBLIC_H
#define __LOONGSON_PUBLIC_H
#include <stdio.h>
// pmon提供的打印函数，见main()函数
struct callvectors {
int (*open) (char *, int, int);
int (*close) (int);
int (*read) (int, void *, int);
int (*write) (int, void *, int);
long long (*lseek) (int, long long, int);
int (*printf) (const char *, ...);
void (*cacheflush) (void);
char *(*gets) (char *);
};
#define myprintf (*callvec->printf)
#define mygets (*callvec->gets)
extern struct callvectors *callvec;
#define MIN(a, b) ((a) > (b) ? (b) : (a))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
typedef enum
{
FALSE=0,
TRUE=1
}BOOL;
/*
* 将指定寄存器的指定位置1
* @reg 寄存器地址
* @bit 需要置1的那一bit
*/
void reg_set_one_bit(volatile unsigned int *reg, unsigned int bit);
/*
* 将指定寄存器的指定位清零
* @reg 寄存器地址
* @bit 需要清零的那一bit
*/
void reg_clr_one_bit(volatile unsigned int *reg, unsigned int bit);
/*
* 获取指定寄存器的指定位的值
* @reg 寄存器地址
* @bit 需要读取值的那一bit
* @ret 指定位的值
*/
unsigned int reg_get_bit(volatile unsigned int *reg, unsigned int bit);
/*
* 向寄存器中写入8bit(一个字节)数据
* @data 待写入的数据
* @addr 寄存器地址
*/
void reg_write_8(unsigned char data, volatile unsigned char *addr);
/*
* 从寄存器读出8bit(一个字节)数据
* @addr 寄存器地址
* @ret 读出的数据
*/
unsigned char reg_read_8(volatile unsigned char *addr);
/*
* 向寄存器中写一个32bit的数据
* @data 待写入的数据
* @addr 寄存器地址
*/
void reg_write_32(unsigned int data, volatile unsigned int *addr);
/*
* 从寄存器读出一个32bit数据
* @addr 寄存器地址
* @ret 读出的数据
*/
unsigned int reg_read_32(volatile unsigned int *addr);
/**
* ffs - find first bit set
* @x: the word to search
*/
int ls1b_ffs(int x);
/*
* fls - find last (most-significant) bit set
* @x: the word to search
*
* This is defined the same way as ffs.
* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
*/
int ls1b_fls(int x);
#endif
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