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Diffstat (limited to 'libgloss/mn10300/crt0-eval.S')
| -rw-r--r-- | libgloss/mn10300/crt0-eval.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libgloss/mn10300/crt0-eval.S b/libgloss/mn10300/crt0-eval.S new file mode 100644 index 000000000..78a52639c --- /dev/null +++ b/libgloss/mn10300/crt0-eval.S @@ -0,0 +1,82 @@ +##============================================================================== +## +## crt0-eval.S +## +## MN10300 Series Evaluation Board C startup code +## +##============================================================================== +######COPYRIGHTBEGIN#### +## +## Copyright (c) 1995, 1996, 1997, 1998 Cygnus Solutions +## +## The authors hereby grant permission to use, copy, modify, distribute, +## and license this software and its documentation for any purpose, provided +## that existing copyright notices are retained in all copies and that this +## notice is included verbatim in any distributions. No written agreement, +## license, or royalty fee is required for any of the authorized uses. +## Modifications to this software may be copyrighted by their authors +## and need not follow the licensing terms described here, provided that +## the new terms are clearly indicated on the first page of each file where +## they apply. +## +######COPYRIGHTEND#### + +##------------------------------------------------------------------------------ + + .file "crt0-eval.S" + +##------------------------------------------------------------------------------ +## Startup code + + .equ DRAM_TOP,0x48100000 + + .text + + .globl __start +__start: + # Set up stack. Leave 4K at top for use by Cygmon. + + mov DRAM_TOP - 0x1000,a0 + sub 8,a0 + mov a0,sp + + # Clear BSS + + mov __bss_start,a0 + mov _end,a1 + + cmp a0,a1 + beq 8f + clr d0 +1: + movbu d0,(a0) + inc a0 + cmp a0,a1 + bne 1b +8: + # Call constructors + + .extern ___main + call ___main,[],0 + + # Call main + clr d0 + clr d1 + mov d0,(4,sp) + +9: + or 0x0800,psw # Enable interrupts + + .extern _main + call _main,[],0 + + .extern __exit + call __exit,[],0 + +# bra 9b # Loop if we return + + + +##------------------------------------------------------------------------------ +## end of crt0-eval.S + |