1 files changed, 75 insertions, 0 deletions

diff --git a/arch/mips/txx9/generic/mem_tx4927.c b/arch/mips/txx9/generic/mem_tx4927.c
new file mode 100644
index 000000000..deea2ceae
--- /dev/null
+++ b/arch/mips/txx9/generic/mem_tx4927.c
@@ -0,0 +1,75 @@
+/*
+ * common tx4927 memory interface
+ *
+ * Author: MontaVista Software, Inc.
+ *         source@mvista.com
+ *
+ * Copyright 2001-2002 MontaVista Software Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/io.h>
+#include <asm/txx9/tx4927.h>
+
+static unsigned int __init tx4927_process_sdccr(u64 __iomem *addr)
+{
+        u64 val;
+        unsigned int sdccr_ce;
+        unsigned int sdccr_bs;
+        unsigned int sdccr_rs;
+        unsigned int sdccr_cs;
+        unsigned int sdccr_mw;
+        unsigned int bs = 0;
+        unsigned int rs = 0;
+        unsigned int cs = 0;
+        unsigned int mw = 0;
+
+        val = __raw_readq(addr);
+
+        /* MVMCP -- need #defs for these bits masks */
+        sdccr_ce = ((val & (1 << 10)) >> 10);
+        sdccr_bs = ((val & (1 << 8)) >> 8);
+        sdccr_rs = ((val & (3 << 5)) >> 5);
+        sdccr_cs = ((val & (7 << 2)) >> 2);
+        sdccr_mw = ((val & (1 << 0)) >> 0);
+
+        if (sdccr_ce) {
+                bs = 2 << sdccr_bs;
+                rs = 2048 << sdccr_rs;
+                cs = 256 << sdccr_cs;
+                mw = 8 >> sdccr_mw;
+        }
+
+        return rs * cs * mw * bs;
+}
+
+unsigned int __init tx4927_get_mem_size(void)
+{
+        unsigned int total = 0;
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(tx4927_sdramcptr->cr); i++)
+                total += tx4927_process_sdccr(&tx4927_sdramcptr->cr[i]);
+        return total;
+}