1 files changed, 36 insertions, 0 deletions

diff --git a/include/asm-cris/arch-v32/atomic.h b/include/asm-cris/arch-v32/atomic.h
new file mode 100644
index 000000000000..bbfb7a5ae315
--- /dev/null
+++ b/include/asm-cris/arch-v32/atomic.h
@@ -0,0 +1,36 @@
+#ifndef __ASM_CRIS_ARCH_ATOMIC__
+#define __ASM_CRIS_ARCH_ATOMIC__
+
+#include <asm/system.h>
+
+extern void cris_spin_unlock(void *l, int val);
+extern void cris_spin_lock(void *l);
+extern int cris_spin_trylock(void* l);
+
+#ifndef CONFIG_SMP
+#define cris_atomic_save(addr, flags) local_irq_save(flags);
+#define cris_atomic_restore(addr, flags) local_irq_restore(flags);
+#else
+
+extern spinlock_t cris_atomic_locks[];
+#define LOCK_COUNT 128
+#define HASH_ADDR(a) (((int)a) & 127)
+
+#define cris_atomic_save(addr, flags) \
+  local_irq_save(flags); \
+  cris_spin_lock((void*)&cris_atomic_locks[HASH_ADDR(addr)].lock);
+
+#define cris_atomic_restore(addr, flags) \
+  { \
+    spinlock_t *lock = (void*)&cris_atomic_locks[HASH_ADDR(addr)]; \
+    __asm__ volatile ("move.d %1,%0" \
+                          : "=m" (lock->lock) \
+                          : "r" (1) \
+                          : "memory"); \
+    local_irq_restore(flags); \
+  }
+
+#endif
+
+#endif
+