URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [RX600_RX62N-RDK_GNURX/] [RTOSDemo/] [GNU-Files/] [start.asm] - Blame information for rev 585

Details | Compare with Previous | View Log


/*------------------------------------------------------------------------
                                                                       |
   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

Line No.	Rev	Author	Line
1	585	jeremybenn	`/*------------------------------------------------------------------------`
2			`\|`
3			`FILE : start.asm \|`
4			`DATE : Wed, Aug 25, 2010 \|`
5			`DESCRIPTION : Reset Program \|`
6			`CPU TYPE : Other \|`
7			`\|`
8			`This file is generated by KPIT GNU Project Generator (Ver.4.5). \|`
9			`\|`
10			`------------------------------------------------------------------------*/`
11
12
13
14			`/Start.asm/`
15
16			`.list`
17			`.section .text`
18			`.global _start /global Start routine /`
19
20			`#ifdef CPPAPP`
21			`___dso_handle:`
22			`.global ___dso_handle`
23			`#endif`
24
25			`.extern _hw_initialise /external Sub-routine to initialise Hardware/`
26			`.extern _data`
27			`.extern _mdata`
28			`.extern _ebss`
29			`.extern _bss`
30			`.extern _edata`
31			`.extern _main`
32			`.extern _ustack`
33			`.extern _istack`
34			`.extern _rvectors`
35			`#if DEBUG`
36			`.extern _exit`
37			`#endif`
38
39
40			`_start:`
41			`/* initialise user stack pointer */`
42			`mvtc #_ustack,USP`
43
44			`/* initialise interrupt stack pointer */`
45			`mvtc #_istack,ISP`
46
47			`/* setup intb */`
48			`mvtc #_rvectors_start, intb /* INTERRUPT VECTOR ADDRESS definition */`
49
50			`/* setup FPSW */`
51			`mvtc #100h, fpsw`
52
53			`/* load data section from ROM to RAM */`
54
55			`mov #_mdata,r2 /* src ROM address of data section in R2 */`
56			`mov #_data,r1 /* dest start RAM address of data section in R1 */`
57			`mov #_edata,r3 /* end RAM address of data section in R3 */`
58			`sub r1,r3 /* size of data section in R3 (R3=R3-R1) */`
59			`smovf /* block copy R3 bytes from R2 to R1 */`
60
61			`/* bss initialisation : zero out bss */`
62
63			`mov #00h,r2 /* load R2 reg with zero */`
64			`mov #_ebss, r3 /* store the end address of bss in R3 */`
65			`mov #_bss, r1 /* store the start address of bss in R1 */`
66			`sub r1,r3 /* size of bss section in R3 (R3=R3-R1) */`
67			`sstr.b`
68
69			`/* call the hardware initialiser */`
70			`bsr.a _hw_initialise`
71			`nop`
72
73			`/* setup PSW */`
74			`// mvtc #10000h, psw /* Set Ubit & Ibit for PSW */`
75
76			`/* change PSW PM to user-mode */`
77			`// MVFC PSW,R1`
78			`// OR #00100000h,R1`
79			`// PUSH.L R1`
80			`// MVFC PC,R1`
81			`// ADD #10,R1`
82			`// PUSH.L R1`
83			`// RTE`
84			`// NOP`
85			`// NOP`
86
87			`/* start user program */`
88			`bsr.a _main`
89
90			`/* call to exit*/`
91			`_exit:`
92			`bsr.a _exit`
93
94			`.end`

Browse

Tools

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [RX600_RX62N-RDK_GNURX/] [RTOSDemo/] [GNU-Files/] [start.asm] - Blame information for rev 585