Merge branch 'master' of https://github.com/martmists/pokediamond

1 files changed, 71 insertions, 0 deletions

diff --git a/arm9/lib/src/OS_system.c b/arm9/lib/src/OS_system.c
new file mode 100644
index 00000000..c2b08681
--- /dev/null
+++ b/arm9/lib/src/OS_system.c
@@ -0,0 +1,71 @@
+//
+// Created by mart on 4/23/20.
+//
+
+#include "function_target.h"
+#include "OS_system.h"
+
+ARM_FUNC asm OSIntrMode OS_EnableInterrupts() {
+    mrs r0, cpsr
+    bic r1, r0, #HW_PSR_DISABLE_IRQ
+    msr cpsr_c, r1
+    and r0, r0, #HW_PSR_DISABLE_IRQ
+    bx lr
+}
+
+ARM_FUNC asm OSIntrMode OS_DisableInterrupts() {
+    mrs     r0, cpsr
+    orr     r1, r0, #HW_PSR_DISABLE_IRQ
+    msr     cpsr_c, r1
+    and     r0, r0, #HW_PSR_DISABLE_IRQ
+    bx      lr
+}
+
+ARM_FUNC asm OSIntrMode OS_RestoreInterrupts(OSIntrMode state) {
+    mrs     r1, cpsr
+    bic     r2, r1, #HW_PSR_DISABLE_IRQ
+    orr     r2, r2, r0
+    msr     cpsr_c, r2
+    and     r0, r1, #HW_PSR_DISABLE_IRQ
+    bx      lr
+}
+
+ARM_FUNC asm OSIntrMode OS_DisableInterrupts_IrqAndFiq() {
+    mrs r0, cpsr
+    orr r1, r0, #HW_PSR_DISABLE_IRQ_FIQ
+    msr cpsr_c, r1
+    and r0, r0, #HW_PSR_DISABLE_IRQ_FIQ
+    bx lr
+}
+
+ARM_FUNC asm OSIntrMode OS_RestoreInterrupts_IrqAndFiq(OSIntrMode state) {
+    mrs r1, cpsr
+    bic r2, r1, #HW_PSR_DISABLE_IRQ_FIQ
+    orr r2, r2, r0
+    msr cpsr_c, r2
+    and r0, r1, #HW_PSR_DISABLE_IRQ_FIQ
+    bx lr
+}
+
+ARM_FUNC asm OSIntrMode OS_GetCpsrIrq() {
+    mrs r0, cpsr
+    and r0, r0, #HW_PSR_DISABLE_IRQ
+    bx lr
+}
+
+ARM_FUNC asm OSProcMode OS_GetProcMode() {
+    mrs r0, cpsr
+    and r0, r0, #HW_PSR_CPU_MODE_MASK
+    bx lr
+}
+
+ARM_FUNC asm void OS_SpinWait() {
+    subs r0, r0, #0x4
+    bhs OS_SpinWait
+    bx lr
+}
+
+ARM_FUNC void OS_WaitVBlankIntr() {
+    SVC_WaitByLoop(0x1);
+    OS_WaitIrq(TRUE, OS_IE_V_BLANK);
+}