.align 4
.global _start_

.section .text.start, "x"

.arm

_start_:
  ldr r0, =0x04000200
  mov r1, #0
  str r1, [r0, #8]  //disable ime
  str r1, [r0, #0x10] //disable all interrupts
  str r1, [r0, #0x18]
  mov r1, #0xFFFFFFFF
  str r1, [r0, #0x14] //clear pending irqs
  str r1, [r0, #0x1C]
  bl bss_loop
  ldr sp, =0x03808000 //setup stack; stack grows downwards, so start it here.
  bl main //start executing C code
  b .

bss_loop:
  ldr r0, =__bss_start
  ldr r1, =__bss_end
  mov r2, #0
clear_bss:
  cmp r0, r1 //check if we're at the end
  bxeq lr //if we're at the end, return
  str r2, [r0], #4 //clear the word
  b clear_bss

.pool