Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/asm-h8300/atomic.h b/include/asm-h8300/atomic.h
new file mode 100644
index 0000000..7230f65
--- /dev/null
+++ b/include/asm-h8300/atomic.h
@@ -0,0 +1,113 @@
+#ifndef __ARCH_H8300_ATOMIC__
+#define __ARCH_H8300_ATOMIC__
+
+/*
+ * Atomic operations that C can't guarantee us. Useful for
+ * resource counting etc..
+ */
+
+typedef struct { int counter; } atomic_t;
+#define ATOMIC_INIT(i) { (i) }
+
+#define atomic_read(v) ((v)->counter)
+#define atomic_set(v, i) (((v)->counter) = i)
+
+#include <asm/system.h>
+#include <linux/kernel.h>
+
+static __inline__ int atomic_add_return(int i, atomic_t *v)
+{
+ int ret,flags;
+ local_irq_save(flags);
+ ret = v->counter += i;
+ local_irq_restore(flags);
+ return ret;
+}
+
+#define atomic_add(i, v) atomic_add_return(i, v)
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
+
+static __inline__ int atomic_sub_return(int i, atomic_t *v)
+{
+ int ret,flags;
+ local_irq_save(flags);
+ ret = v->counter -= i;
+ local_irq_restore(flags);
+ return ret;
+}
+
+#define atomic_sub(i, v) atomic_sub_return(i, v)
+
+static __inline__ int atomic_inc_return(atomic_t *v)
+{
+ int ret,flags;
+ local_irq_save(flags);
+ v->counter++;
+ ret = v->counter;
+ local_irq_restore(flags);
+ return ret;
+}
+
+#define atomic_inc(v) atomic_inc_return(v)
+
+/*
+ * atomic_inc_and_test - increment and test
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1
+ * and returns true if the result is zero, or false for all
+ * other cases.
+ */
+#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
+
+static __inline__ int atomic_dec_return(atomic_t *v)
+{
+ int ret,flags;
+ local_irq_save(flags);
+ --v->counter;
+ ret = v->counter;
+ local_irq_restore(flags);
+ return ret;
+}
+
+#define atomic_dec(v) atomic_dec_return(v)
+
+static __inline__ int atomic_dec_and_test(atomic_t *v)
+{
+ int ret,flags;
+ local_irq_save(flags);
+ --v->counter;
+ ret = v->counter;
+ local_irq_restore(flags);
+ return ret == 0;
+}
+
+static __inline__ void atomic_clear_mask(unsigned long mask, unsigned long *v)
+{
+ __asm__ __volatile__("stc ccr,r1l\n\t"
+ "orc #0x80,ccr\n\t"
+ "mov.l %0,er0\n\t"
+ "and.l %1,er0\n\t"
+ "mov.l er0,%0\n\t"
+ "ldc r1l,ccr"
+ : "=m" (*v) : "g" (~(mask)) :"er0","er1");
+}
+
+static __inline__ void atomic_set_mask(unsigned long mask, unsigned long *v)
+{
+ __asm__ __volatile__("stc ccr,r1l\n\t"
+ "orc #0x80,ccr\n\t"
+ "mov.l %0,er0\n\t"
+ "or.l %1,er0\n\t"
+ "mov.l er0,%0\n\t"
+ "ldc r1l,ccr"
+ : "=m" (*v) : "g" (mask) :"er0","er1");
+}
+
+/* Atomic operations are already serializing */
+#define smp_mb__before_atomic_dec() barrier()
+#define smp_mb__after_atomic_dec() barrier()
+#define smp_mb__before_atomic_inc() barrier()
+#define smp_mb__after_atomic_inc() barrier()
+
+#endif /* __ARCH_H8300_ATOMIC __ */