[SMP] SMP synchronization and scheduling

2016-11-18 09:36:01 +01:00
parent 8961ae33eb
commit 474914ab1e
12 changed files with 69 additions and 18 deletions
--- a/kernel/cpu/sync.S
+++ b/kernel/cpu/sync.S
@@ -0,0 +1,16 @@
+.intel_syntax noprefix
+.global spin_lock
+spin_lock:
+  mov rdx, rdi
+  mov rax, 0x0
+  mov rcx, 0x1
+.retry:
+  xor rax, rax
+  lock cmpxchg [rdx], cl
+  jnz .retry
+  ret
+
+.global spin_unlock
+spin_unlock:
+  movq [rdi], 0x0
+  ret