diff options
Diffstat (limited to 'src/interrupts/interrupt_vector.S')
-rw-r--r-- | src/interrupts/interrupt_vector.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/interrupts/interrupt_vector.S b/src/interrupts/interrupt_vector.S new file mode 100644 index 0000000..1ec80f7 --- /dev/null +++ b/src/interrupts/interrupt_vector.S @@ -0,0 +1,56 @@ +_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 + +reset_handler_caller: + ldr sp, =_supervisor_stack_top + ldr r5, =reset_handler + 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 |