91 lines
2.7 KiB
ArmAsm
91 lines
2.7 KiB
ArmAsm
/*
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#####ECOSGPLCOPYRIGHTBEGIN####
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## -------------------------------------------
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## This file is part of eCos, the Embedded Configurable Operating System.
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## Copyright (C) 2008 Øyvind Harboe
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##
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## eCos is free software; you can redistribute it and/or modify it under
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## the terms of the GNU General Public License as published by the Free
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## Software Foundation; either version 2 or (at your option) any later version.
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##
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## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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## WARRANTY; without even the implied warranty of MERCHANTABILITY or
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## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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## for more details.
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##
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## You should have received a copy of the GNU General Public License along
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## with eCos; if not, write to the Free Software Foundation, Inc.,
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## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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##
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## As a special exception, if other files instantiate templates or use macros
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## or inline functions from this file, or you compile this file and link it
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## with other works to produce a work based on this file, this file does not
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## by itself cause the resulting work to be covered by the GNU General Public
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## License. However the source code for this file must still be made available
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## in accordance with section (3) of the GNU General Public License.
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##
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## This exception does not invalidate any other reasons why a work based on
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## this file might be covered by the GNU General Public License.
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## -------------------------------------------
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#####ECOSGPLCOPYRIGHTEND####
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*/
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/*
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Jump table for flash driver
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Registers in ARM callling convention is to place args in registers
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starting at r0.
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So for:
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void foo(int a, int b, int c).
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a=r0
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b=r1
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c=r2
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*/
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.global _stack_base
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.global _stack_start
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.global _workarea
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.global _start
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.global _start_bss_clear
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_start:
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// offset=0
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// int erase(void *address, int len)
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ldr sp,=_stack_start
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bl erase
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nop // Stop CPU here using hw breakpoint
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// offset=0xc
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// int program(void *buffer, void *address, int len)
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ldr sp,=_stack_start
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bl program
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nop // Stop CPU here using hw breakpoint
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// offset=0x18
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ldr r0,=_workarea
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nop // Stop CPU here using hw breakpoint
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// offset=0x20
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// int init() - returns error message if the flash chip can't be detected
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ldr sp,=_stack_start
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bl init
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nop // Stop CPU here using hw breakpoint
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.section ".bss"
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.balign 4
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_stack_base:
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.rept 4096
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.byte 0
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.endr
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_stack_start:
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.balign 4
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_workarea:
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.rept 8192
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.byte 0
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.endr
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// NB!!! we clear bss while the stack is in use, so we start BSS clearing here !!! :-)
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_start_bss_clear:
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