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/* Startup code for M68HC11.
Copyright (C) 1999, 2000, 2002, 2008, 2009 Free Software Foundation, Inc.
This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This file 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. See the GNU
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
;-----------------------------------------
; startup code
;-----------------------------------------
#ifdef __HAVE_SHORT_INT__
.mode mshort
#else
.mode mlong
#endif
#if defined(__USE_RTC__) && defined(mc68hc12)
.macro jsr name
call \name
.endm
#endif
;;
;;
;; The linker concatenate the .install* sections in the following order:
;;
;; .install0 Setup the stack pointer
;; .install1 Place holder for applications
;; .install2 Optional installation of data section in memory
;; .install3 Place holder for applications
;; .install4 Invokes the main
;;
.sect .install0,"ax",@progbits
.globl _start
_start:
;;
;; At this step, the stack is not initialized and interrupts are masked.
;; Applications only have 64 cycles to initialize some registers.
;;
;; To have a generic/configurable startup, initialize the stack to
;; the end of some memory region. The _stack symbol is defined by
;; the linker.
;;
lds #_stack
.sect .install2,"ax",@progbits
;;
;; Call a specific initialization operation. The default is empty.
;; It can be overridden by applications. It is intended to initialize
;; the 68hc11 registers. Function prototype is:
;;
;; int __premain(void);
;;
jsr __premain
;;
;;
;;
.sect .install4,"ax",@progbits
jsr main
fatal:
jsr exit
bra fatal
;-----------------------------------------
; end startup code
;-----------------------------------------
;; Force loading of data section mapping and bss clear
.2byte __map_data_section
.2byte __init_bss_section
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