/*
* 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.rtems.com/license/LICENSE.
*
* Modified to reflect Hitachi EDK SH7045F:
* John M. Mills (jmills@tga.com)
* TGA Technologies, Inc.
* 100 Pinnacle Way, Suite 140
* Norcross, GA 30071 U.S.A.
*
*
* This modified file may be copied and distributed in accordance
* the above-referenced license. It is provided for critique and
* developmental purposes without any warranty nor representation
* by the authors or by TGA Technologies.
*
* $Id$
*/
#include "asm.h"
BEGIN_CODE
PUBLIC(start)
SYM (start):
! install the stack pointer
mov.l stack_k,r15
#ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */
! Initialize minimal hardware
mov.l hw_init_k, r0
jsr @r0
nop !debug dead-slot target
#endif /* START_HW_INIT */
! 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
nop !debug dead-slot target
! 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
nop !debug dead-slot target
! overlay monitor vectors onto RTEMS table template
! code adapted from Hitachi EDK7045F User Manual: "Copyvect.s"
mova vects_k,r0
mov.l @r0, r1 ! Shadow vect tbl addr
stc vbr, r2 ! Original vect tbl addr
and #0, r0
mov r0, r4 ! 0 in r4 and r0
!trapa #32
or #0x80, r0
mov.l @(r0,r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!cpu addr err
or #0x24, r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!ill slot
or #0x18, r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!ill inst
or #0x10, r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!nmi
or #0x2c, r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!User brk
or #0x30, r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!sci0 err
or #0x80, r0
rotl r0
rotl r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
mov r4, r0
!sci rx
or #0x81, r0
rotl r0
rotl r0
mov.l @(r0, r2), r3
mov.l r3, @(r0, r1)
stc vbr,r3 ! capture copy of monitor vbr
mov.l vbrtemp_k,r0
mov.l r3, @r0
mov.l vects_k,r0 ! point vbr to vectab
ldc r0,vbr
! call the mainline
mov #0,r4 ! argc
mov #0,r5 ! argv - can place in dead slot
mov.l main_k,r0
jsr @r0
nop !debug dead-slot target
! call exit
mov r0,r4
mov.l exit_k,r0
or r0,r0
jsr @r0
nop !debug dead-slot target
mov.l vbrtemp_k,r0 ! restore original vbr
mov.l @r0,r3
ldc r3, vbr
trapa #13 ! UBR capture by monitor
nop !debug dead-slot target
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)
#ifdef START_HW_INIT /* from $RTEMS_BSP.cfg */
hw_init_k:
.long SYM(hw_initialize)
#endif /* START_HW_INIT */
vbrtemp_k:
.long SYM(vbrtemp)
vects_k:
.long SYM(vectab)
vects_size:
.word 255
#ifdef __ELF__
.section .stack,"aw"
#else
.section .stack
#endif
SYM(stack):
.long 0xdeaddead
#ifdef __ELF__
.section .bss,"aw"
#else
.section .bss
#endif
SYM(vbrtemp):
.long 0x0
