/*
* Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
* Bernd Becker (becker@faw.uni-ulm.de)
*
* COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*
* COPYRIGHT (c) 1998.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include "asm.h"
BEGIN_CODE
PUBLIC(start)
SYM (start):
! install the stack pointer
mov.l stack_k,r15
! zero out bss
mov.l edata_k,r0
mov.l end_k,r1
mov #0,r2
0:
mov.l r2,@r0
add #4,r0
cmp/ge r0,r1
bt 0b
! copy the vector table from rom to ram
mov.l vects_k,r0 ! vectab
mov #0,r1 ! address of boot vector table
mov #0,r2 ! number of bytes copied
mov.w vects_size,r3 ! size of entries in vectab
1:
mov.l @r1+,r4
mov.l r4,@r0
add #4,r0
add #1,r2
cmp/hi r3,r2
bf 1b
mov.l vects_k,r0 ! update vbr to point to vectab
ldc r0,vbr
! call the mainline
mov #0,r4 ! argc
mov.l main_k,r0
jsr @r0
mov #0,r5 ! argv
! call exit
mov r0,r4
mov.l exit_k,r0
jsr @r0
or r0,r0
END_CODE
.align 2
stack_k:
.long SYM(stack)
edata_k:
.long SYM(edata)
end_k:
.long SYM(end)
main_k:
.long SYM(boot_card)
exit_k:
.long SYM(exit)
vects_k:
.long SYM(vectab)
vects_size:
.word 255
#ifdef __ELF__
.section .stack,"aw"
#else
.section .stack
#endif
SYM(stack):
.long 0xdeaddead
