git.zerfleddert.de Git - proxmark3-svn/blob - bootrom/flash-reset.s

   1 @-----------------------------------------------------------------------------
   2 @ This code is licensed to you under the terms of the GNU GPL, version 2 or,
   3 @ at your option, any later version. See the LICENSE.txt file for the text of
   4 @ the license.
   5 @-----------------------------------------------------------------------------
   6 @ Reset vector for running from FLASH
   7 @-----------------------------------------------------------------------------
   8
   9 .extern CopyBootToRAM
  10
  11 .section .startup,"ax"
  12          .code 32
  13          .align 0
  14
  15 .global flashstart
  16 flashstart:
  17     b       Reset
  18     b       UndefinedInstruction
  19     b       SoftwareInterrupt
  20     b       PrefetchAbort
  21     b       DataAbort
  22     b       Reserved
  23     b       Irq
  24     b       Fiq
  25
  26 Reset:
  27     ldr     sp,     .stack_end  @ initialize stack pointer to top of RAM
  28     bl      CopyBootToRAM                       @ copy bootloader to RAM (in case the
  29                                                                 @ user re-flashes the bootloader)
  30     ldr     r3,     .bootphase2_start   @ start address of RAM bootloader
  31     bx      r3                                          @ jump to it
  32
  33         .stack_end:
  34         .word _stack_end
  35         .bootphase2_start:
  36         .word __bootphase2_start__
  37
  38 Fiq:
  39     b       Fiq
  40 UndefinedInstruction:
  41     b       UndefinedInstruction
  42 SoftwareInterrupt:
  43     b       SoftwareInterrupt
  44 PrefetchAbort:
  45     b       PrefetchAbort
  46 DataAbort:
  47     b       DataAbort
  48 Reserved:
  49     b       Reserved
  50 Irq:
  51     b       Irq