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path: root/src/arm/PL1/kernel/interrupt_vector.S
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_interrupt_vectors:
	b reset_handler_caller
	b undef_handler_caller
	b svc_handler_caller
	b abort_handler_caller
	b abort_handler_caller
	b generic_handler_caller
	b irq_handler_caller
	b fiq_handler_caller
	
// from what I've heard, reset is never used on the Pi;
// in our case it should run once - when stage1 of the kernel
// jumps to stage2
reset_handler_caller:
	ldr sp, =_supervisor_stack_top
	ldr r5, =setup
	bx r5
	
undef_handler_caller:
	ldr sp, =_supervisor_stack_top
	ldr r5, =undefined_instruction_vector
	bx r5

svc_handler_caller:
	ldr sp, =_supervisor_stack_top
	push {r0-r12, lr}
	mov r0, sp
	ldr r5, =supervisor_call_handler
	blx r5
	ldm sp!, {r0-r12, pc} ^
	
abort_handler_caller:
	ldr sp, =_supervisor_stack_top
	ldr r5, =abort_handler
	bx r5

generic_handler_caller:
	ldr sp, =_supervisor_stack_top
	ldr r5, =generic_handler
	bx r5

irq_handler_caller:
	ldr sp, =_irq_stack_top
	sub lr, #4
	push {r0-r12, lr}
	mov r0, sp
	ldr r3, =irq_handler
	blx r3
	ldm sp!, {r0-r12, pc} ^

fiq_handler_caller:
	ldr sp, =_fiq_stack_top
	ldr r5, =fiq_handler
	bx r5

irq:
	mov sp, #0x8000
	ldr r5, =abort_handler
    subs pc,lr,#4