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.section ".text.exceptions"
.globl irq
irq:
cpsid ai
stmfd sp!, {r0-r12,lr}
// Run IRQ handler
bl c_irq_handler
cmp r0, #1
bne 1f
// Schedule if interrupted a thread
mrs r1, spsr
and r1, r1, #0x1f
cmp r1, #0x10
bne 1f
ldmfd sp!, {r0-r12,lr}
// Don't skip missed instruction upon return
sub lr, #4
push {r3}
// Store the instruction in a special area for
// future processing
ldr r3, =irqlr
str lr, [r3, #0]
pop {r3}
cps #0x13
b schedule
1:
ldmfd sp!, {r0-r12,lr}
subs pc, lr, #4
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