modify file names and create directories

arch/x86/kernel/include/arch-lock.h

@@ -0,0 +1,84 @@
+/*
+ * Excerpted from Linux 3.0: arch/x86/include/asm/spinlock.h
+ */
+#ifndef __HEADER_X86_COMMON_ARCH_LOCK
+#define __HEADER_X86_COMMON_ARCH_LOCK
+
+#include <aal/cpu.h>
+
+//#define DEBUG_SPINLOCK
+
+#ifdef DEBUG_SPINLOCK
+int __kprintf(const char *format, ...);
+#endif
+
+typedef int aal_spinlock_t;
+
+#define AAL_STATIC_SPINLOCK_FUNCS
+
+static void aal_mc_spinlock_init(aal_spinlock_t *lock)
+{
+	*lock = 0;
+}
+#define SPIN_LOCK_UNLOCKED 0
+
+static unsigned long aal_mc_spinlock_lock(aal_spinlock_t *lock)
+{
+	int inc = 0x00010000;
+	int tmp;
+	unsigned long flags;
+	
+	flags = cpu_disable_interrupt_save();
+
+#if 0
+	asm volatile("lock ; xaddl %0, %1\n"
+	             "movzwl %w0, %2\n\t"
+	             "shrl $16, %0\n\t"
+	             "1:\t"
+	             "cmpl %0, %2\n\t"
+	             "je 2f\n\t"
+	             "rep ; nop\n\t"
+	             "movzwl %1, %2\n\t"
+	             "jmp 1b\n"
+	             "2:"
+	             : "+Q" (inc), "+m" (*lock), "=r" (tmp) : : "memory", "cc");
+#endif
+
+#ifdef DEBUG_SPINLOCK
+	__kprintf("[%d] trying to grab lock: 0x%lX\n", 
+	          aal_mc_get_processor_id(), lock);
+#endif
+	asm volatile("lock; xaddl %0, %1\n"
+			"movzwl %w0, %2\n\t"
+			"shrl $16, %0\n\t"
+			"1:\t"
+			"cmpl %0, %2\n\t"
+			"je 2f\n\t"
+			"rep ; nop\n\t"
+			"movzwl %1, %2\n\t"
+			/* don't need lfence here, because loads are in-order */
+			"jmp 1b\n"
+			"2:"
+			: "+r" (inc), "+m" (*lock), "=&r" (tmp)
+			:
+			: "memory", "cc");
+
+#ifdef DEBUG_SPINLOCK
+	__kprintf("[%d] holding lock: 0x%lX\n", aal_mc_get_processor_id(), lock);
+#endif
+
+	return flags;
+}
+
+static void aal_mc_spinlock_unlock(aal_spinlock_t *lock, unsigned long flags)
+{
+	asm volatile ("lock incw %0" : "+m"(*lock) : : "memory", "cc");
+
+	cpu_restore_interrupt(flags);
+#ifdef DEBUG_SPINLOCK
+	__kprintf("[%d] released lock: 0x%lX\n", aal_mc_get_processor_id(), lock);
+#endif
+}
+
+#endif
+