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// MIT License, Copyright (c) 2020 Marvin Borner
// Syscall implementation
#ifndef SYS_H
#define SYS_H
#define KEYBOARD_MAGIC 0x555555
#define MOUSE_MAGIC 0xaaaaaa
enum sys {
SYS_LOOP, // To infinity and beyond (debug)!
SYS_MALLOC, // Allocate memory
SYS_FREE, // Free memory
SYS_READ, // Read file
SYS_WRITE, // Write to file
SYS_EXEC, // Execute path
SYS_EXIT, // Exit current process
SYS_YIELD, // Switch to next process
SYS_TIME, // Get kernel time
SYS_REGISTER, // Register for event
SYS_UNREGISTER, // Unregister event
SYS_SEND, // Send message to process
SYS_RECEIVE, // Receive message (non-blocking/sync)
SYS_GETPID, // Get the process ID
SYS_NET_OPEN, // Open network socket
SYS_NET_CLOSE, // Close network socket
SYS_NET_CONNECT, // Connect to destination
SYS_NET_SEND, // Send to socket
SYS_NET_RECEIVE, // Receive data from socket
};
enum event_type { EVENT_KEYBOARD, EVENT_MOUSE, EVENT_MAX };
struct message {
int src;
int type;
void *data;
};
struct event_keyboard {
int magic;
int press;
int scancode;
};
struct event_mouse {
int magic;
int diff_x;
int diff_y;
int but1;
int but2;
int but3;
};
#if defined(userspace)
int sys0(enum sys num);
int sys1(enum sys num, int d1);
int sys2(enum sys num, int d1, int d2);
int sys3(enum sys num, int d1, int d2, int d3);
int sys4(enum sys num, int d1, int d2, int d3, int d4);
int sys5(enum sys num, int d1, int d2, int d3, int d4, int d5);
int sysv(enum sys num, ...);
/**
* Wrappers
*/
#define loop() sys0(SYS_LOOP)
#define read(path) (void *)sys1(SYS_READ, (int)(path))
#define write(path, buf) sys2(SYS_WRITE, (int)(path), (buf))
#define exec(path, ...) (int)sysv(SYS_EXEC, (int)(path), ##__VA_ARGS__)
#define exit(status) \
{ \
sys1(SYS_EXIT, (int)status); \
while (1) { \
yield(); \
} \
}
#define yield() (int)sys0(SYS_YIELD)
#define time() (int)sys0(SYS_TIME)
#define event_register(id) sys1(SYS_REGISTER, (int)(id))
#define event_unregister(id) sys1(SYS_UNREGISTER, (int)(id))
#define msg_send(pid, type, msg) sys3(SYS_SEND, (int)(pid), (int)(type), (int)(msg))
#define msg_receive() (struct message *)sys0(SYS_RECEIVE)
#define getpid() (int)sys0(SYS_GETPID)
static inline struct message *msg_receive_loop()
{
struct message *msg;
while (!(msg = msg_receive()))
yield();
return msg;
}
#endif
#endif
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