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Kernel: Implement basic SpinLock

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Bananymous
2023-02-01 01:51:25 +02:00
parent 1945b716ad
commit 337569b0ca
8 changed files with 109 additions and 1 deletions
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17
kernel/arch/x86_64/SpinLock.S Normal file
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@@ -0,0 +1,17 @@
.global spinlock_lock_asm
spinlock_lock_asm:
lock; btsq $0, (%rdi)
jnc .done
.retry:
pause
testq $1, (%rdi)
jne .retry
lock; btsq $0, (%rdi)
jc .retry
.done:
ret
.global spinlock_unlock_asm
spinlock_unlock_asm:
movq $0, (%rdi)
ret

3
kernel/arch/x86_64/make.config
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@@ -6,6 +6,7 @@ KERNEL_ARCH_LIBS=
KERNEL_ARCH_OBJS= \
$(ARCHDIR)/boot.o \
$(ARCHDIR)/IDT.o \
$(ARCHDIR)/MMU.o \
$(ARCHDIR)/interrupts.o \
$(ARCHDIR)/MMU.o \
$(ARCHDIR)/SpinLock.o \