1 files changed, 21 insertions, 4 deletions
diff --git a/common.h b/common.h
index 1c214a4..d69eb1a 100644
--- a/common.h
+++ b/common.h
@@ -1,15 +1,32 @@
 #ifndef _COMMON_H
 #define _COMMON_H
 
-#define __round_mask(x, y) ((__typeof__(x))((y)-1))
-#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
+#include <string.h>
+
+#include "ccan/endian/endian.h"
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 
 #define min(x, y) ((x) > (y) ? (y) : (x))
 #define max(x, y) ((x) > (y) ? (x) : (y))
 
-#define __stringify_1(x...) #x
-#define __stringify(x...)  __stringify_1(x)
+static inline uint32_t mmio_read32(void *addr)
+{
+	leint32_t *p = addr;
+
+	return le32_to_cpu(*p);
+}
+
+/* Access 64-bit registers as 2 32-bit; Some devices fail 64-bit MMIO. */
+static inline uint64_t mmio_read64(void *addr)
+{
+	const volatile uint32_t *p = addr;
+	uint32_t low, high;
+
+	low = le32_to_cpu(*p);
+	high = le32_to_cpu(*(p + 1));
+
+	return ((uint64_t) high << 32) | low;
+}
 
 #endif