diff options
Diffstat (limited to 'interrupt_vector.S')
| -rw-r--r-- | interrupt_vector.S | 49 |
1 files changed, 45 insertions, 4 deletions
diff --git a/interrupt_vector.S b/interrupt_vector.S index af80eec..1f5bb3a 100644 --- a/interrupt_vector.S +++ b/interrupt_vector.S @@ -1,4 +1,40 @@ +.section ".interrupt_vectors.text" + +.global abort_handler +.local generic_handler +.global _interrupt_vectors _interrupt_vectors: + ldr pc,reset_handler + ldr pc,undefined_handler + ldr pc,swi_handler + ldr pc,prefetch_handler + ldr pc,data_handler + ldr pc,unused_handler + ldr pc,irq_handler_caller + ldr pc,fiq_handler + reset_handler: .word abort + undefined_handler: .word abort + swi_handler: .word abort + prefetch_handler: .word abort + data_handler: .word abort + unused_handler: .word abort + irq_handler_caller: .word irq + fiq_handler: .word abort + //b abort_handler_caller + //b abort_handler_caller + //b abort_handler_caller + //b abort_handler_caller + //b abort_handler_caller + //b abort_handler_caller + //b abort_handler_caller + + +.globl enable_irq +enable_irq: + mrs r0,cpsr + bic r0,r0,#0x80 + msr cpsr_c,r0 + bx lr b reset_handler_caller b undef_handler_caller b svc_handler_caller @@ -7,12 +43,12 @@ _interrupt_vectors: 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 @@ -24,7 +60,7 @@ svc_handler_caller: ldr r5, =supervisor_call_handler blx r5 ldm sp!, {r5, pc} ^ - + abort_handler_caller: ldr sp, =_supervisor_stack_top ldr r5, =abort_handler @@ -47,4 +83,9 @@ 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
\ No newline at end of file |