Warning, /bsps/sh/gensh2/start/start.rom is written in an unsupported language. File is not indexed.
0001 /*
0002 * Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
0003 * Bernd Becker (becker@faw.uni-ulm.de)
0004 *
0005 * COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
0006 *
0007 * This program is distributed in the hope that it will be useful,
0008 * but WITHOUT ANY WARRANTY; without even the implied warranty of
0009 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
0010 *
0011 *
0012 * COPYRIGHT (c) 1998.
0013 * On-Line Applications Research Corporation (OAR).
0014 *
0015 * The license and distribution terms for this file may be
0016 * found in the file LICENSE in this distribution or at
0017 * http://www.rtems.org/license/LICENSE.
0018 */
0019
0020 #include "asm.h"
0021
0022 BEGIN_CODE
0023 PUBLIC(start)
0024 SYM (start):
0025 ! install the stack pointer
0026 mov.l stack_k,r15
0027
0028 ! zero out bss
0029 mov.l edata_k,r0
0030 mov.l end_k,r1
0031 mov #0,r2
0032 0:
0033 mov.l r2,@r0
0034 add #4,r0
0035 cmp/ge r0,r1
0036 bt 0b
0037
0038 ! copy the vector table from rom to ram
0039 mov.l vects_k,r0 ! vectab
0040 mov #0,r1 ! address of boot vector table
0041 mov #0,r2 | number of bytes copied
0042 mov.w vects_size,r3 ! size of entries in vectab
0043 1:
0044 mov.l @r1+,r4
0045 mov.l r4,@r0
0046 add #4,r0
0047 add #1,r2
0048 cmp/hi r3,r2
0049 bf 1b
0050
0051 mov.l vects_k,r0 ! update vbr to point to vectab
0052 ldc r0,vbr
0053
0054 ! call the mainline
0055 mov #0,r4 ! argc
0056 mov.l main_k,r0
0057 jsr @r0
0058 mov #0,r5 ! argv
0059
0060 ! call exit
0061 mov r0,r4
0062 mov.l exit_k,r0
0063 jsr @r0
0064 or r0,r0
0065
0066 END_CODE
0067
0068 .align 2
0069 stack_k:
0070 .long SYM(_ISR_Stack_area_end)
0071 edata_k:
0072 .long SYM(edata)
0073 end_k:
0074 .long SYM(end)
0075 main_k:
0076 .long SYM(boot_card)
0077 exit_k:
0078 .long SYM(exit)
0079
0080 vects_k:
0081 .long SYM(vectab)
0082 vects_size:
0083 .word 255
