- if (gd->env_valid == 0){
- AT91F_DataflashInit(); /* prepare for DATAFLASH read/write */
-
- /* read old CRC */
- read_dataflash(CFG_ENV_ADDR + offsetof(env_t, crc),
- sizeof(ulong), (char *)&crc);
- new = 0;
- len = ENV_SIZE;
- off = offsetof(env_t,data);
- while (len > 0) {
- int n = (len > sizeof(buf)) ? sizeof(buf) : len;
- read_dataflash(CFG_ENV_ADDR + off, n, (char *)buf);
- new = crc32 (new, buf, n);
- len -= n;
- off += n;
- }
- if (crc == new) {
- gd->env_addr = offsetof(env_t,data);
- gd->env_valid = 1;
- } else {
- gd->env_addr = (ulong)&default_environment[0];
- gd->env_valid = 0;
- }
+
+ if (gd->env_valid)
+ return 0;
+
+ AT91F_DataflashInit(); /* prepare for DATAFLASH read/write */
+
+ /* read old CRC */
+ read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc),
+ sizeof(ulong), (char *)&crc);
+
+ off = offsetof(env_t, data);
+ while (len > 0) {
+ int n = (len > sizeof(buf)) ? sizeof(buf) : len;
+
+ read_dataflash(CONFIG_ENV_ADDR + off, n, (char *)buf);
+
+ new = crc32(new, buf, n);
+ len -= n;
+ off += n;
+ }
+
+ if (crc == new) {
+ gd->env_addr = offsetof(env_t, data);
+ gd->env_valid = 1;
+ } else {
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 0;