#ifndef __M68K_ENTRY_H
#define __M68K_ENTRY_H

#include <asm/setup.h>
#include <asm/page.h>
#ifdef __ASSEMBLY__
#include <asm/thread_info.h>
#endif

/*
 * Stack layout in 'ret_from_exception':
 *
 *	This allows access to the syscall arguments in registers d1-d5
 *
 *	 0(sp) - d1
 *	 4(sp) - d2
 *	 8(sp) - d3
 *	 C(sp) - d4
 *	10(sp) - d5
 *	14(sp) - a0
 *	18(sp) - a1
 *	1C(sp) - a2
 *	20(sp) - d0
 *	24(sp) - orig_d0
 *	28(sp) - stack adjustment
 *	2C(sp) - [ sr              ] [ format & vector ]
 *	2E(sp) - [ pc-hiword       ] [ sr              ]
 *	30(sp) - [ pc-loword       ] [ pc-hiword       ]
 *	32(sp) - [ format & vector ] [ pc-loword       ]
 *		  ^^^^^^^^^^^^^^^^^   ^^^^^^^^^^^^^^^^^
 *			M68K		  COLDFIRE
 */

/* the following macro is used when enabling interrupts */
#if defined(MACH_ATARI_ONLY)
	/* block out HSYNC on the atari */
#define ALLOWINT	(~0x400)
#else
	/* portable version */
#define ALLOWINT	(~0x700)
#endif /* machine compilation types */

#ifdef __ASSEMBLY__
/*
 * This defines the normal kernel pt-regs layout.
 *
 * regs a3-a6 and d6-d7 are preserved by C code
 * the kernel doesn't mess with usp unless it needs to
 */
#define SWITCH_STACK_SIZE	(6*4+4)	/* includes return address */

#ifdef CONFIG_COLDFIRE
#ifdef CONFIG_COLDFIRE_SW_A7
/*
 * This is made a little more tricky on older ColdFires. There is no
 * separate supervisor and user stack pointers. Need to artificially
 * construct a usp in software... When doing this we need to disable
 * interrupts, otherwise bad things will happen.
 */
.globl sw_usp
.globl sw_ksp

.macro SAVE_ALL_SYS
	move	#0x2700,%sr		/* disable intrs */
	btst	#5,%sp@(2)		/* from user? */
	bnes	6f			/* no, skip */
	movel	%sp,sw_usp		/* save user sp */
	addql	#8,sw_usp		/* remove exception */
	movel	sw_ksp,%sp		/* kernel sp */
	subql	#8,%sp			/* room for exception */
	clrl	%sp@-			/* stkadj */
	movel	%d0,%sp@-		/* orig d0 */