macros: move macros for human-readable sizes and rounding

include/macros.h

@@ -2,3 +2,13 @@
 
 #define min(x, y) ((x < y) ? (x) : (y))
 #define max(x, y) ((x > y) ? (x) : (y))
+
+/* Human-readable sizes */
+#define KIB 1024
+#define MIB (1024 * KIB)
+#define GIB (1024 * GIB)
+
+/* Rounding */
+#define IS_ROUND(x, k) (!((x) & ((k) - 1)))
+#define ROUND_DOWN(x, k) ((x) & ~((k) - 1))
+#define ROUND_UP(x, k) (((x) + (k) - 1) & ~((k) - 1))

include/spi_flash.h

@@ -1,10 +1,5 @@
 #pragma once
 
-/* Human-readable sizes */
-#define KIB 1024
-#define MIB (1024 * KIB)
-#define GIB (1024 * GIB)
-
 /* Read commands */
 #define CMD_READ_ARRAY_SLOW		0x03
 #define CMD_READ_ID				0x9f
@@ -20,11 +15,6 @@
 #define CMD_ERASE_64K			0xD8
 #define CMD_ERASE_CHIP			0x60
 
-/* Rounding */
-#define IS_ROUND(x, k) (!((x) & ((k) - 1)))
-#define ROUND_DOWN(x, k) ((x) & ~((k) - 1))
-#define ROUND_UP(x, k) (((x) + (k) - 1) & ~((k) - 1))
-
 void init_spi(void);
 void spi_send_cmd(uint32_t dev, const char *cmd, size_t cmd_len,
 	char *data, size_t data_len);

source/spi_flash.c

@@ -13,7 +13,8 @@
 #include <limits.h>
 #include <sys/types.h>
 
-#include "spi_flash.h"
+#include <macros.h>
+#include <spi_flash.h>
 
 void init_spi(void)
 {