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.include "asm/macros.inc"
.include "constants/constants.inc"
.syntax unified
.text
thumb_func_start fill_rq_stack
fill_rq_stack: // fill iqr and user stack with 'MCZ3'
adr r0, pool
ldm r0!, {r1, r2, r3}
loop1:
subs r2, #4
str r1, [r2]
cmp r2, r3
bgt loop1
bx lr
// unused
// returns the maximum values reached by irq stack (r0) and usr stack (r1)
check_stack_threshold:
adr r0, pool
ldm r0!, {r1, r2, r3}
loop2:
ldr r0, [r3]
adds r3, #4
cmp r0, r1 // cmp against magic
beq loop2
subs r2, #0xa0
loop3:
ldr r0, [r2]
adds r2, #4
cmp r0, r1 // cmp against magic
beq loop3
subs r1, r2, #4
subs r0, r3, #4
bx lr
.align 2, 0
pool:
.byte '3, 'Z, 'C, 'M // r1
.4byte irq_stack_begin // r2
.4byte usr_stack_top // r3
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