101 lines
1.8 KiB
C
101 lines
1.8 KiB
C
// 一些常用的、共用的接口
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#ifndef __OPENLOONGSON_PUBLIC_H
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#define __OPENLOONGSON_PUBLIC_H
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#include <stdio.h>
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// pmon提供的打印函数，见main()函数
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struct callvectors {
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int (*open) (char *, int, int);
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int (*close) (int);
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int (*read) (int, void *, int);
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int (*write) (int, void *, int);
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long long (*lseek) (int, long long, int);
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int (*printf) (const char *, ...);
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void (*cacheflush) (void);
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char *(*gets) (char *);
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};
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#define myprintf (*callvec->printf)
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#define mygets (*callvec->gets)
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extern struct callvectors *callvec;
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#define MIN(a, b) ((a) > (b) ? (b) : (a))
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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typedef enum
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{
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FALSE=0,
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TRUE=1
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}BOOL;
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/*
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* 将指定寄存器的指定位置1
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* @reg 寄存器地址
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* @bit 需要置1的那一bit
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*/
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void reg_set_one_bit(volatile unsigned int *reg, unsigned int bit);
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/*
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* 将指定寄存器的指定位清零
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* @reg 寄存器地址
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* @bit 需要清零的那一bit
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*/
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void reg_clr_one_bit(volatile unsigned int *reg, unsigned int bit);
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/*
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* 获取指定寄存器的指定位的值
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* @reg 寄存器地址
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* @bit 需要读取值的那一bit
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* @ret 指定位的值
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*/
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unsigned int reg_get_bit(volatile unsigned int *reg, unsigned int bit);
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/*
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* 向寄存器中写入8bit(一个字节)数据
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* @data 待写入的数据
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* @addr 寄存器地址
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*/
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void reg_write_8(unsigned char data, volatile unsigned char *addr);
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/*
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* 从寄存器读出8bit(一个字节)数据
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* @addr 寄存器地址
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* @ret 读出的数据
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*/
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unsigned char reg_read_8(volatile unsigned char *addr);
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/*
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* 向寄存器中写一个32bit的数据
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* @data 待写入的数据
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* @addr 寄存器地址
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*/
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void reg_write_32(unsigned int data, volatile unsigned int *addr);
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/*
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* 从寄存器读出一个32bit数据
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* @addr 寄存器地址
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* @ret 读出的数据
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*/
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unsigned int reg_read_32(volatile unsigned int *addr);
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/**
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* ffs - find first bit set
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* @x: the word to search
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*/
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int ls1c_ffs(int x);
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#endif
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