alex/agb
1
0
Fork 0
mirror of https://github.com/italicsjenga/agb.git synced 2025-01-11 17:41:33 +11:00
Code Issues Packages Projects Releases Wiki Activity

disable interrupts during handler

Browse source
This commit is contained in:
Corwin Kuiper 2021-06-25 23:34:58 +01:00
parent 9bab2a75d0
commit e22564a29c
1 changed files with 10 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
agb/interrupt_simple.s
View file

@ -6,6 +6,11 @@
InterruptHandlerSimple:
ldr r2, =0x04000200 @ interrupt enable register location
mov r1, #0
strh r1, [r2, #8]
push {r2}
ldrh r1, [r2] @ load 16 bit interrupt enable to r1
ldrh r3, [r2, #2] @ load 16 bit interrupt request to r3
and r0, r1, r3 @ interrupts both enabled and requested
@ -33,5 +38,10 @@ InterruptHandlerSimple:
bic r2, r2, #0xD
msr cpsr_c, r2
pop {r2}
mov r1, #0
strh r1, [r2, #8]
bx lr @ return to bios
.pool