diff options
Diffstat (limited to 'interrupt_vector.S')
| -rw-r--r-- | interrupt_vector.S | 53 |
1 files changed, 9 insertions, 44 deletions
diff --git a/interrupt_vector.S b/interrupt_vector.S index 04561e6..1ec80f7 100644 --- a/interrupt_vector.S +++ b/interrupt_vector.S @@ -1,41 +1,4 @@ -.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 - 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 @@ -44,12 +7,12 @@ enable_irq: 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 @@ -57,11 +20,12 @@ undef_handler_caller: svc_handler_caller: ldr sp, =_supervisor_stack_top - push {r5, lr} + push {r0-r12, lr} + mov r0, sp ldr r5, =supervisor_call_handler blx r5 - ldm sp!, {r5, pc} ^ - + ldm sp!, {r0-r12, pc} ^ + abort_handler_caller: ldr sp, =_supervisor_stack_top ldr r5, =abort_handler @@ -75,10 +39,11 @@ generic_handler_caller: irq_handler_caller: ldr sp, =_irq_stack_top sub lr, #4 - push {r0-r3, lr} + push {r0-r12, lr} + mov r0, sp ldr r3, =irq_handler blx r3 - ldm sp!, {r0-r3, pc} ^ + ldm sp!, {r0-r12, pc} ^ fiq_handler_caller: ldr sp, =_fiq_stack_top |