78 lines
2.6 KiB
ArmAsm
78 lines
2.6 KiB
ArmAsm
/***************************************************************************
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* Copyright (C) 2008 Øyvind Harboe *
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* oyvind.harboe@zylin.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* 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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/*
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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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