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70 lines
1.7 KiB
70 lines
1.7 KiB
#ifndef __KERNEL_h
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#define __KERNEL_h
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#include "common.h"
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#define kernel_section_name "kernel_xjm"
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#define KERNEL_TYPE static
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#define K_SUCCESS 0
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#define K_FAIL -1 //执行错误
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#define K_NOFOUND -2 //未找到
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#define k_OPEN_FAIL -3 //设备存在，但打开失败
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#define K_PARAM_ERR -4 //输入参数错误
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#define K_UNOPEN -5 //设备未打开
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#define K_OPS_NULL -6 //设备接口未实现
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#define K_TIMEOUT -7 //执行超时
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#define KERNEL_DEVICE_INIT(device_name) \
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KERNEL_TYPE const char kernel_device_name[] = device_name; \
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KERNEL_TYPE int kernel_device_status = FALSE;
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#define KERNEL_CHECK_OPEN \
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if (kernel_device_status == FALSE) return K_UNOPEN; \
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//内核框架
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typedef struct
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{
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int (*f_open)(int flags);
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int (*f_write)(unsigned char *buff, unsigned int len, void *param);
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int (*f_read)(unsigned char *buff, unsigned int len, void *param);
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int (*f_ioctl)(unsigned int cmd, unsigned long arg);
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int (*f_close)(void);
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int (*f_isopen)(void);
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} file_operations;
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typedef struct
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{
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char *filename;
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file_operations *ops;
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} KENERAL_NODE;
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#define register_driver(ops) \
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static const KENERAL_NODE kernel_node = {(char *)kernel_device_name, (file_operations *)&ops}; \
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static const int kernel_mem_node __attribute__((used, section(kernel_section_name))) = (int)&kernel_node;
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int open(char *filename, int flags);
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int write(int handle, unsigned char *buff, unsigned int len, void *param);
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int read(int handle, unsigned char *buff, unsigned int len, void *param);
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int ioctl(int handle, unsigned int cmd, unsigned long arg);
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int close(int handle);
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int isopen(int handle);
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#endif
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