+static unsigned char *dfu_buf;
+static unsigned long dfu_buf_size = CONFIG_SYS_DFU_DATA_BUF_SIZE;
+
+static unsigned char *dfu_free_buf(void)
+{
+ free(dfu_buf);
+ dfu_buf = NULL;
+ return dfu_buf;
+}
+
+static unsigned char *dfu_get_buf(void)
+{
+ char *s;
+
+ if (dfu_buf != NULL)
+ return dfu_buf;
+
+ s = getenv("dfu_bufsiz");
+ dfu_buf_size = s ? (unsigned long)simple_strtol(s, NULL, 16) :
+ CONFIG_SYS_DFU_DATA_BUF_SIZE;
+
+ dfu_buf = memalign(CONFIG_SYS_CACHELINE_SIZE, dfu_buf_size);
+ if (dfu_buf == NULL)
+ printf("%s: Could not memalign 0x%lx bytes\n",
+ __func__, dfu_buf_size);
+
+ return dfu_buf;
+}