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-rw-r--r--src/northbridge/via/vt8601/raminit.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/src/northbridge/via/vt8601/raminit.c b/src/northbridge/via/vt8601/raminit.c
index 1aa58224f7..b16d0be3c7 100644
--- a/src/northbridge/via/vt8601/raminit.c
+++ b/src/northbridge/via/vt8601/raminit.c
@@ -377,18 +377,22 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl)
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");