From ffb2c4adfb8e65e355b39abd39d994eebc649c98 Mon Sep 17 00:00:00 2001 From: Wojtek Kosior Date: Fri, 3 Jan 2020 04:53:01 +0100 Subject: add (not yet fully working - it can only send through uart now) interrupt-driven uart together with "scheduler" --- interrupt_vector.S | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'interrupt_vector.S') diff --git a/interrupt_vector.S b/interrupt_vector.S index af80eec..9404839 100644 --- a/interrupt_vector.S +++ b/interrupt_vector.S @@ -20,10 +20,11 @@ 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 @@ -38,10 +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 -- cgit v1.2.3