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");
--
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