commonlib: move DIV_ROUND macros from nvidia/tegra

DIV_ROUND_CLOSEST and DIV_ROUND_UP are useful macros for other
architectures. This patch moves them from soc/nvidia/tegra/types.h
to commonlib/include/commonlib/helpers.h .

Change-Id: I54521d9b197934cef8e352f9a5c4823015d85f01
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/16415
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/commonlib/include/commonlib/helpers.h

@@ -34,6 +34,22 @@
 #define ABS(a) (((a) < 0) ? (-(a)) : (a))
 #define CEIL_DIV(a, b)  (((a) + (b) - 1) / (b))
 #define IS_POWER_OF_2(x)  (((x) & ((x) - 1)) == 0)
+#define DIV_ROUND_UP(x, y)  (((x) + (y) - 1) / (y))
+/*
+ * Divide positive or negative dividend by positive divisor and round
+ * to closest integer. Result is undefined for negative divisors and
+ * for negative dividends if the divisor variable type is unsigned.
+ */
+#define DIV_ROUND_CLOSEST(x, divisor)(			\
+{							\
+	typeof(x) __x = x;				\
+	typeof(divisor) __d = divisor;			\
+	(((typeof(x))-1) > 0 ||			\
+	 ((typeof(divisor))-1) > 0 || (__x) > 0) ?	\
+		(((__x) + ((__d) / 2)) / (__d)) :	\
+		(((__x) - ((__d) / 2)) / (__d));	\
+}							\
+)
 
 /* Standard units. */
 #define KiB (1<<10)

src/soc/nvidia/tegra/types.h

@@ -51,22 +51,4 @@
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 #endif
 
-#define DIV_ROUND_UP(x, y)  (((x) + (y) - 1) / (y))
-
-/*
- * Divide positive or negative dividend by positive divisor and round
- * to closest integer. Result is undefined for negative divisors and
- * for negative dividends if the divisor variable type is unsigned.
- */
-#define DIV_ROUND_CLOSEST(x, divisor)(			\
-{							\
-	typeof(x) __x = x;				\
-	typeof(divisor) __d = divisor;			\
-	(((typeof(x))-1) > 0 ||				\
-	 ((typeof(divisor))-1) > 0 || (__x) > 0) ?	\
-		(((__x) + ((__d) / 2)) / (__d)) :	\
-		(((__x) - ((__d) / 2)) / (__d));	\
-}							\
-)
-
 #endif /* __TEGRA_MISC_TYPES_H__ */

src/soc/nvidia/tegra210/addressmap.c

@@ -15,6 +15,7 @@
 
 #include <assert.h>
 #include <arch/io.h>
+#include <commonlib/helpers.h>
 #include <console/console.h>
 #include <soc/addressmap.h>
 #include <soc/id.h>

src/soc/nvidia/tegra210/dsi.c

@@ -32,6 +32,7 @@
 #include <soc/tegra_dsi.h>
 #include <soc/mipi-phy.h>
 #include "jdi_25x18_display/panel-jdi-lpm102a188a.h"
+#include <commonlib/helpers.h>
 
 struct tegra_mipi_device mipi_device_data[NUM_DSI];