sys.h

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/*
 *	ApOS (Another Project software for s3c2410)
 *	
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License version 2 as
 *	published by the Free Software Foundation.
 *			
 *						Copyright caiyuqing
 *
 */
#ifndef _SYS_H
#define _SYS_H

#include "../s3c2410/cpu.h"

typedef int(* fn_ptr)(struct cpu_registers *regs);

#define NR_enter_super  0
#define NR_fork 	1
#define NR_singal 	2
#define NR_sigaction  	3
#define NR_free_process 4

extern int sys_enter_super(struct cpu_registers *regs);
extern int sys_fork(struct cpu_registers *regs);
extern int sys_singal(struct cpu_registers *regs);
extern int sys_sigaction(struct cpu_registers *regs);
extern int sys_free_process(struct cpu_registers *regs);


#define system_call0(type,name) \
type name()\
{\
	unsigned int res;\
	unsigned int fun_id=NR_##name;\
	asm volatile(\
		"ldr r0,%1 \n\t"\
		"swi \n\t"\
		"str r0,%0 \n\t"\
		:"=m"(res)\
		:"m"(fun_id)\
		:"r0","memory"\
	);\
	return (type)res;\
}


#define system_call1(type,name,atype,a) \
type name(atype a)\
{\
	unsigned int res;\
	unsigned int fun_id=NR_##name;\
	asm volatile(\
		"ldr r0,%1 \n\t"\
		"ldr r1,%2 \n\t"\
		"swi \n\t"\
		"str r0,%0 \n\t"\
		:"=m"(res)\
		:"m"(fun_id),"m"(a)\
		:"r0","r1","memory"\
	);\
	return (type)res;\
}


#define system_call2(type,name,atype,a,btype,b) \
type name(atype a,btype b)\
{\
	unsigned int res;\
	unsigned int fun_id=NR_##name;\
	asm volatile(\
		"ldr r0,%1 \n\t"\
		"ldr r1,%2 \n\t"\
		"ldr r2,%3 \n\t"\
		"swi \n\t"\
		"str r0,%0 \n\t"\
		:"=m"(res)\
		:"m"(fun_id),"m"(a),"m"(b)\
		:"r0","r1","r2","memory"\
	);\
	return (type)res;\
}


#define system_call3(type,name,atype,a,btype,b,ctype,c) \
type name(atype a,btype b,ctype c)\
{\
	unsigned int res;\
	unsigned int fun_id=NR_##name;\
	asm volatile(\
		"ldr r0,%1 \n\t"\
		"ldr r1,%2 \n\t"\
		"ldr r2,%3 \n\t"\
		"ldr r3,%4 \n\t"\
		"swi \n\t"\
		"str r0,%0 \n\t"\
		:"=m"(res)\
		:"m"(fun_id),"m"(a),"m"(b),"m"(c)\
		:"r0","r1","r2","r3","memory"\
	);\
	return (type)res;\
}

#endif