[LinuxBIOS] Patch: epia MA map type

[Alex Mauer]

The attached patch sets the MA map type correctly for all DIMMs I was 
able to find to test with the Epia.

-Alex Mauer "hawke"

Index: src/northbridge/via/vt8601/raminit.c
===================================================================
--- src/northbridge/via/vt8601/raminit.c        (revision 2639)
+++ src/northbridge/via/vt8601/raminit.c        (working copy)
@@ -377,18 +377,18 @@
                if (!size)
                        continue;

-               /* Calculate the value of MA mapping type register,
-                * based on size of SDRAM chips. */
-               size = (size & 0xffff) << (3 + 3);
-               /* convert module size to be in Mbits */
-               size /= spd_num_chips(slot);
-               print_debug_hex16(size);
-               print_debug(" is the chip size\r\n");
-               if (size < 64)
-                       ma = 0;
-               else if (size < 256)
-                       ma = 8;
-               else
+/* Read the row densities */
+               size = smbus_read_byte(0x50+slot, 0x1f);
+/* Set the MA map type.
+ * 0xa should be another option, but when it would be used is unknown.
+ */
+               if (size < 16 ) /* less than 64 MB per side */
+                       ma = 0x0;
+               else if (size < 32) /* less than 128MB per side */
+                       ma = 0x8;
+               else if ( size < 64) /* less than 256MB per side */
+                       ma = 0xc;
+               else /* 256MB or more per side */
                        ma = 0xe;
                print_debug_hex16(ma);
                print_debug(" is the MA type\r\n");