// kernel.h
// Author: Josh Holtrop
// Date: 08/16/04
// Modified: 08/18/05

#ifndef __HOS_KERNEL_H__
#define __HOS_KERNEL_H__ __HOS_KERNEL_H__

#include "hos_defines.h"
#include "multiboot.h"

typedef struct
{
	void	*vid_addr;	// address of LFB, 0 if console mode
	u32_t	width;		// width in pixels or columns if vid_mem == 0
	u32_t	height;		// height in pixels or columns if vid_mem == 0
	u32_t	bpp;		// bits per pixel - 15/16/24/32
} __attribute__ ((packed)) real_mode_param_t;

typedef struct
{
	u32_t	gs;
	u32_t	fs;
	u32_t	es;
	u32_t	ds;
	u32_t	ebp;
	u32_t	esi;
	u32_t	edi;
	u32_t	edx;
	u32_t	ecx;
	u32_t	ebx;
	u32_t	eax;
	u32_t	eip;
	u32_t	cs;
	u32_t	eflags;
	u32_t	ss;		/* present if ring3->ring0 transition ?? */
	u32_t	esp;
} int_stack_t;

/* returns true to callee if we should jump to a real mode module */
mb_module_t *k_mbsave(mb_info_t *mbinfo, unsigned int mb_magic);
void	_init();
void	isr(u32_t num, int_stack_t *stack_frame);
void	k_enter_critical();	// functions for implementing "atomic actions"
void	k_leave_critical();
void	k_check(int val, char *msg);

#endif