Create starting point for GNURX RX62N HEW project.

Demo/RX600_RX62N-MDK_GNURX/RTOSDemo/GNU-Files/start.asm

@@ -0,0 +1,94 @@
+/*------------------------------------------------------------------------
+                                                                       |
+   FILE        : start.asm                                             |
+   DATE        :  Wed, Aug 25, 2010                                    |
+   DESCRIPTION :   Reset Program                                       |
+   CPU TYPE    :    Other                                              |
+                                                                       |
+   This file is generated by KPIT GNU Project Generator (Ver.4.5).     |
+                                                                       |
+------------------------------------------------------------------------*/
+                        
+
+
+	/*Start.asm*/
+
+	.list
+	.section .text
+	.global _start   /*global Start routine */
+	
+#ifdef CPPAPP	
+___dso_handle:
+	.global ___dso_handle
+#endif	
+
+	.extern _hw_initialise  /*external Sub-routine to initialise Hardware*/
+	.extern _data
+	.extern _mdata
+	.extern _ebss
+	.extern _bss
+	.extern _edata
+	.extern _main 
+	.extern _ustack
+	.extern _istack
+	.extern _rvectors
+#if DEBUG
+	.extern _exit
+#endif
+
+	
+_start:
+/* initialise user stack pointer */
+	mvtc	#_ustack,USP
+
+/* initialise interrupt stack pointer */
+	mvtc	#_istack,ISP
+
+/* setup intb */
+	mvtc	#_rvectors_start, intb	/* INTERRUPT VECTOR ADDRESS  definition	*/
+
+/* setup FPSW */
+	mvtc    #100h, fpsw	
+
+/* load data section from ROM to RAM */
+
+	mov     #_mdata,r2      /* src ROM address of data section in R2 */
+	mov     #_data,r1       /* dest start RAM address of data section in R1 */
+	mov     #_edata,r3      /* end RAM address of data section in R3 */
+	sub    r1,r3            /* size of data section in R3 (R3=R3-R1) */
+	smovf                   /* block copy R3 bytes from R2 to R1 */
+
+/* bss initialisation : zero out bss */
+
+	mov	#00h,r2  	/* load R2 reg with zero */
+	mov	#_ebss, r3  /* store the end address of bss in R3 */
+	mov	#_bss, r1 	/* store the start address of bss in R1 */
+	sub   r1,r3	   	/* size of bss section in R3 (R3=R3-R1) */
+	sstr.b
+
+/* call the hardware initialiser */
+	bsr.a	_hw_initialise	
+	nop
+
+/* setup PSW */
+	mvtc	#10000h, psw			/* Set Ubit & Ibit for PSW */
+
+/* change PSW PM to user-mode */
+	MVFC   PSW,R1
+	OR     #00100000h,R1
+	PUSH.L R1
+	MVFC   PC,R1
+	ADD    #10,R1
+	PUSH.L R1
+	RTE
+	NOP
+	NOP
+
+/* start user program */
+	bsr.a	_main		
+	
+/* call to exit*/
+_exit:
+	bsr.a 	_exit
+	
+	.end