breakhdr.s

T－Kernel Shell Sample

/*""FILE COMMENT""*************************************************************
*   System Name : RENESAS 7145 micro T-Engine
*   File Name   : breakhdr.S
*   Version     : 1.01.00
*   Contents    : User Break Handler entry
*   Model       : RENESAS T-Engine/uT-Engine
*   CPU         : RENESAS T-Engine Series CPU
*   Compiler    : GNU
*   OS          : T-Kernel
*
*   note        : The Software is being delivered to you "AS IS" 
*               : and Renesas,whether explicitly or implicitly makes  
*               : no warranty as to its Use or performance. 
*               : RENESAS AND ITS SUPPLIER DO NOT AND CANNOT WARRANT 
*               : THE PERFORMANCE OR RESULTS YOU MAY OBTAIN  BY USING 
*               : THE SOFTWARE. AS TO ANY MATTER INCLUDING WITHOUT 
*               : LIMITATION NONINFRINGEMENT OF THIRD PARTY RIGHTS,
*               : MERCHANTABILITY, INTEGRATION, SATISFACTORY QUALITY, 
*               : OR FITNESS FOR ANY PARTICULAR PURPOSE.
*
*   Copyright (c) 2004-2006 RENESAS TECHNOLOGY CORP. All Rights Reserved.
*   AND RENESAS SOLUTIONS CORP. All Rights Reserved.
*
*   history     : 2004.10.01 ver1.00.00
*               : 2006.02.01 ver1.01.00
*""FILE COMMENT END""*********************************************************/

#include <machine.h>

/*""FUNC COMMENT""*******************************************************
 * ID          : X.Y.Z
 * Outline     : UserBreak/NMI/Exception Handler Entry(Assembler)
 *-----------------------------------------------------------------------
 * Include     : 
 *-----------------------------------------------------------------------
 * Definition  : UserBreakHandler
 *-----------------------------------------------------------------------
 * Function    : UserBreak/NMI/Exception Handler Entry(Assembler) 
 *-----------------------------------------------------------------------
 * Argument    : None
 *----------------------------------------------------------------------- 
 * Return      : None
 *-----------------------------------------------------------------------
 * Input       : None 
 * Output      : None 
 *-----------------------------------------------------------------------
 * Used Func   : break_shell()
 *-----------------------------------------------------------------------
 * Notice      : In coming here,some register saved already as follows:
 *               High Address +--------+
 *                            | SR     |
 *                            | PC     |
 *                            | R3     |(=dintno)
 *                            | R2     |
 *               Low  Address +--------+
 *""FUNC COMMENT END""***************************************************/
	.text
	.balign	2
	.globl	Csym(UserBreakHandler)
Csym(UserBreakHandler):
	mov.l   DisableIntSR,r2
	ldc     r2,  sr
	mov     r15, r2
	mov.l   BreakStackTop,r15
	
	mov.l	r0,  @-r2		// Save register 
	mov.l	r1,  @-r2		// Save register 
	mov.l	r4,  @-r2		// Save register 
	mov.l	r5,  @-r2		// Save register 
	mov.l	r6,  @-r2		// Save register 
	mov.l	r7,  @-r2		// Save register 
	mov.l	r8,  @-r2		// Save register 
	mov.l	r9,  @-r2
	mov.l	r10, @-r2
	mov.l	r11, @-r2
	mov.l	r12, @-r2
	mov.l	r13, @-r2
	mov.l	r14, @-r2
	stc.l	gbr, @-r2
	sts.l	pr,  @-r2
	sts.l	macl,@-r2
	sts.l	mach,@-r2

	mov     r3,  r5        // R5=dintno
	mov.l   r2,  @-SP
	mov.l   C_BreakEntry,r0
	jsr	@r0			// call break(regaddr)
	mov     r2,  r4 // R4=RegTable(delayed slot)
	
	mov.l   @r15, r15     
	lds.l	@SP+, mach		// Restore register 
	lds.l	@SP+, macl 
	lds.l	@SP+, pr
	ldc.l	@SP+, gbr
	mov.l	@SP+, r14
	mov.l	@SP+, r13
	mov.l	@SP+, r12
	mov.l	@SP+, r11
	mov.l	@SP+, r10
	mov.l	@SP+, r9
	mov.l	@SP+, r8
	mov.l	@SP+, r7
	mov.l	@SP+, r6
	mov.l	@SP+, r5
	mov.l	@SP+, r4
	mov.l	@SP+, r1
	mov.l	@SP+, r0
	mov.l	@SP+, r2
	mov.l	@SP+, r3
	rte
	nop

	.balign 4
C_BreakEntry:	.long	_break_shell
DisableIntSR:	.long   0x000000F0
BreakStackTop:	.long   0xFFFFE400