X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/15c4dc5ace24e6081d1597b011148f156cdd599e..759c16b31f8dcec37458dd6a5973ce0cfce58015:/bootrom/flash-reset.s diff --git a/bootrom/flash-reset.s b/bootrom/flash-reset.s index a94d048a..95c8f590 100644 --- a/bootrom/flash-reset.s +++ b/bootrom/flash-reset.s @@ -1,43 +1,51 @@ -.extern CopyBootToRAM - +@----------------------------------------------------------------------------- +@ This code is licensed to you under the terms of the GNU GPL, version 2 or, +@ at your option, any later version. See the LICENSE.txt file for the text of +@ the license. +@----------------------------------------------------------------------------- +@ Reset vector for running from FLASH +@----------------------------------------------------------------------------- + .section .startup,"ax" - .code 32 - .align 0 + +.arm .global flashstart flashstart: - b Reset - b UndefinedInstruction - b SoftwareInterrupt - b PrefetchAbort - b DataAbort - b Reserved - b Irq - b Fiq - -Reset: - ldr sp, .stack_end @ initialize stack pointer to top of RAM - bl CopyBootToRAM @ copy bootloader to RAM (in case the - @ user re-flashes the bootloader) - ldr r3, .bootphase2_start @ start address of RAM bootloader - bx r3 @ jump to it - - .stack_end: - .word _stack_end - .bootphase2_start: - .word __bootphase2_start__ - -Fiq: - b Fiq -UndefinedInstruction: - b UndefinedInstruction -SoftwareInterrupt: - b SoftwareInterrupt -PrefetchAbort: - b PrefetchAbort -DataAbort: - b DataAbort -Reserved: - b Reserved -Irq: - b Irq + b reset + b undefined_instruction + b software_interrupt + b prefetch_abort + b data_abort + b . @reserved + ldr pc, [pc,#-0xF20] @ IRQ - read the AIC + b fiq + +reset: + ldr sp, =_stack_end @ initialize stack pointer to top of RAM + + @ copy bootloader to RAM (in case the user re-flashes the bootloader) + ldr r0, =__bootphase2_src_start__ + ldr r1, =__bootphase2_start__ + ldr r2, =__bootphase2_end__ +1: + ldr r3, [r0], #4 + str r3, [r1], #4 + cmp r1, r2 + blo 1b + + ldr r3, =ram_start @ start address of RAM bootloader + bx r3 @ jump to it + + .ltorg + +undefined_instruction: + b . +software_interrupt: + b . +prefetch_abort: + b . +data_abort: + b . +fiq: + b .