Kernel: Implement basic SpinLock

2023-02-01 01:52:52 +02:00
parent 1945b716ad
commit 337569b0ca
8 changed files with 109 additions and 1 deletions
@@ -0,0 +1,17 @@
+.global spinlock_lock_asm
+spinlock_lock_asm:
+	lock; btsl $0, (%edi)
+	jnc .done
+.retry:
+	pause
+	testl $1, (%edi)
+	jne .retry
+	lock; btsl $0, (%edi)
+	jc .retry
+.done:
+	ret
+
+.global spinlock_unlock_asm
+spinlock_unlock_asm:
+	movl $0, (%edi)
+	ret
@@ -7,4 +7,5 @@ KERNEL_ARCH_OBJS=		\
 $(ARCHDIR)/boot.o		\
 $(ARCHDIR)/IDT.o		\
 $(ARCHDIR)/MMU.o		\
+$(ARCHDIR)/SpinLock.o	\