#define SSNOP sll zero, zero, 1
+#ifdef CONFIG_SGI_IP28
+/* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */
+#include <asm/cacheops.h>
+#define R10KCBARRIER(addr) cache Cache_Barrier, addr;
+#else
+#define R10KCBARRIER(addr)
+#endif
+
#endif /* __ASM_ASM_H */