+#if MACH == MP1000
+
+static int
+mp1000_check_checksum(void)
+{
+ int i;
+ unsigned short sum = 0;
+ unsigned short expect;
+
+ for (i = MP1000_CKS_RANGE_START; i <= MP1000_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+
+ expect = __nvram_read_byte(MP1000_CKS_LOC+1)<<8 |
+ __nvram_read_byte(MP1000_CKS_LOC);
+ return ((sum & 0xffff) == expect);
+}
+
+static void
+mp1000_set_checksum(void)
+{
+ int i;
+ unsigned short sum = 0;
+
+ for (i = MP1000_CKS_RANGE_START; i <= MP1000_CKS_RANGE_END; ++i)
+ sum += __nvram_read_byte(i);
+ __nvram_write_byte(sum >> 8, MP1000_CKS_LOC + 1);
+ __nvram_write_byte(sum & 0xff, MP1000_CKS_LOC);
+}
+
+#ifdef CONFIG_PROC_FS
+
+#define SERVER_N_LEN 32
+#define PATH_N_LEN 32
+#define FILE_N_LEN 32
+#define NVRAM_MAGIC_SIG 0xdead
+
+typedef struct NvRamImage
+{
+ unsigned short int magic;
+ unsigned short int mode;
+ char fname[FILE_N_LEN];
+ char path[PATH_N_LEN];
+ char server[SERVER_N_LEN];
+ char pad[12];
+} NvRam;
+
+static int
+mp1000_proc_infos(unsigned char *nvram, char *buffer, int *len,
+ off_t *begin, off_t offset, int size)
+{
+ int checksum;
+ NvRam* nv = (NvRam*)nvram;
+
+ spin_lock_irq(&rtc_lock);
+ checksum = __nvram_check_checksum();
+ spin_unlock_irq(&rtc_lock);
+
+ PRINT_PROC("Checksum status: %svalid\n", checksum ? "" : "not ");
+
+ switch( nv->mode )
+ {
+ case 0 :
+ PRINT_PROC( "\tMode 0, tftp prompt\n" );
+ break;
+ case 1 :
+ PRINT_PROC( "\tMode 1, booting from disk\n" );
+ break;
+ case 2 :
+ PRINT_PROC( "\tMode 2, Alternate boot from disk /boot/%s\n", nv->fname );
+ break;
+ case 3 :
+ PRINT_PROC( "\tMode 3, Booting from net:\n" );
+ PRINT_PROC( "\t\t%s:%s%s\n",nv->server, nv->path, nv->fname );
+ break;
+ default:
+ PRINT_PROC( "\tInconsistant nvram?\n" );
+ break;
+ }
+
+ return 1;
+}
+#endif
+
+#endif /* MACH == MP1000 */
+