2010-02-21 08:12:52 +08:00
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@-----------------------------------------------------------------------------
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@ This code is licensed to you under the terms of the GNU GPL, version 2 or,
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@ at your option, any later version. See the LICENSE.txt file for the text of
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@ the license.
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@-----------------------------------------------------------------------------
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@ Reset vector for running from FLASH
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@-----------------------------------------------------------------------------
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2010-02-21 05:24:25 +08:00
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.section .startup,"ax"
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2010-02-26 23:14:47 +08:00
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.arm
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2010-02-21 05:24:25 +08:00
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.global flashstart
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flashstart:
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2010-02-26 23:14:47 +08:00
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b reset
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b undefined_instruction
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b software_interrupt
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b prefetch_abort
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b data_abort
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b . @reserved
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2010-09-11 06:34:24 +08:00
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ldr pc, [pc,#-0xF20] @ IRQ - read the AIC
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2010-02-26 23:14:47 +08:00
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b fiq
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reset:
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ldr sp, =_stack_end @ initialize stack pointer to top of RAM
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@ copy bootloader to RAM (in case the user re-flashes the bootloader)
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ldr r0, =__bootphase2_src_start__
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ldr r1, =__bootphase2_start__
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ldr r2, =__bootphase2_end__
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1:
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ldr r3, [r0], #4
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str r3, [r1], #4
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cmp r1, r2
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blo 1b
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ldr r3, =ram_start @ start address of RAM bootloader
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bx r3 @ jump to it
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.ltorg
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undefined_instruction:
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b .
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software_interrupt:
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b .
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prefetch_abort:
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b .
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data_abort:
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b .
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fiq:
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b .
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