1 files changed, 29 insertions, 0 deletions

diff --git a/arch/mips/txx9/rbtx4939/prom.c b/arch/mips/txx9/rbtx4939/prom.c
new file mode 100644
index 000000000..ba25ba1bd
--- /dev/null
+++ b/arch/mips/txx9/rbtx4939/prom.c
@@ -0,0 +1,29 @@
+/*
+ * rbtx4939 specific prom routines
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/memblock.h>
+#include <asm/txx9/generic.h>
+#include <asm/txx9/rbtx4939.h>
+
+void __init rbtx4939_prom_init(void)
+{
+        unsigned long start, size;
+        u64 win;
+        int i;
+
+        for (i = 0; i < 4; i++) {
+                if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
+                        continue;
+                win = ____raw_readq(&tx4939_ddrcptr->win[i]);
+                start = (unsigned long)(win >> 48);
+                size = (((unsigned long)(win >> 32) & 0xffff) + 1) - start;
+                memblock_add(start << 20, size << 20);
+        }
+        txx9_sio_putchar_init(TX4939_SIO_REG(0) & 0xfffffffffULL);
+}