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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-03-20 17:20:45 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-03-20 17:20:45 +0000 |
| commit | f8b27df985a1c65b329164fe1f57ca348fe862c1 (patch) | |
| tree | 71966dab41fe483c6b830876bacc761902465a62 /c/src/lib/start/sh/start.s | |
| parent | SH port submitted from Ralf Corsepius <corsepiu@faw.uni-ulm.de>. (diff) | |
| download | rtems-f8b27df985a1c65b329164fe1f57ca348fe862c1.tar.bz2 | |
New port from Ralf Corsepius <corsepiu@faw.uni-ulm.de>.
Diffstat (limited to '')
| -rw-r--r-- | c/src/lib/start/sh/start.s | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/c/src/lib/start/sh/start.s b/c/src/lib/start/sh/start.s new file mode 100644 index 0000000000..582ea66a75 --- /dev/null +++ b/c/src/lib/start/sh/start.s @@ -0,0 +1,92 @@ +/* + * 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). + * Copyright assigned to U.S. Government, 1994. + * + * 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 +start_l: + mov.l r2,@r0 + add #4,r0 + cmp/ge r0,r1 + bt start_l + + ! copy the vector table from rom to ram + mov.l vects_k,r7 ! vectab + mov #0,r2 ! address of boot vector table + mov #0,r3 | number of bytes copied + mov.w vects_size,r6 ! size of entries in vectab +0: + mov.l @r2+,r1 + mov.l r1,@r7 + add #4,r7 + add #1,r3 + cmp/hi r6,r3 + bf 0b + + mov.l vects_k,r8 ! update vbr to point to vectab + ldc r8,vbr + + ! call the mainline + mov.l main_k,r0 + jsr @r0 + or r0,r0 + + ! call exit + mov r0,r4 + mov.l exit_k,r0 + jsr @r0 + or r0,r0 + + END_CODE + + .align 2 +stack_k: + .long _stack +edata_k: + .long _edata +end_k: + .long _end +main_k: + .long _main +exit_k: + .long _exit + +vects_k: + .long _vectab +vects_size: + .word 255 + +#ifdef __ELF__ + .section .stack,"aw" +#else + .section .stack +#endif +_stack: .long 0xdeaddead |