* Add rudimentary DDB support (no kgdb, no backtrace, no single step).

* Track recent changes to SWI code.
* Allocate RIDs for pmaps (untested).
* Implement assembler version of cpu_switch - its cleaner that way.

1 files changed, 23 insertions, 0 deletions

diff --git a/sys/ia64/include/atomic.h b/sys/ia64/include/atomic.h
index a7b3e21..d4d2bbc 100644
--- a/sys/ia64/include/atomic.h
+++ b/sys/ia64/include/atomic.h
@@ -187,4 +187,27 @@ atomic_cmpset_ptr(volatile void *dst, void *exp, void *src)
 				  (u_long)exp, (u_long)src);
 }
 
+static __inline u_int32_t
+atomic_readandclear_32(volatile u_int32_t* p)
+{
+	u_int32_t val;
+	do {
+		val = *p;
+	} while (!atomic_cmpset_32(p, val, 0));
+	return val;
+}
+
+static __inline u_int64_t
+atomic_readandclear_64(volatile u_int64_t* p)
+{
+	u_int64_t val;
+	do {
+		val = *p;
+	} while (!atomic_cmpset_64(p, val, 0));
+	return val;
+}
+
+#define atomic_readandclear_int	atomic_readandclear_32
+#define atomic_readandclear_long atomic_readandclear_64
+
 #endif /* ! _MACHINE_ATOMIC_H_ */