Author: stepan
Date: 2007-05-10 21:02:19 +0200 (Thu, 10 May 2007)
New Revision: 2653
Modified:
trunk/LinuxBIOSv2/src/northbridge/via/vt8601/raminit.c
Log:
The attached patch sets the MA map type correctly for all DIMMs I was
able to find to test with the Epia.
Signed-off-by: Alex Mauer <[EMAIL PROTECTED]>
Acked-by: Stefan Reinauer <[EMAIL PROTECTED]>
Modified: trunk/LinuxBIOSv2/src/northbridge/via/vt8601/raminit.c
===================================================================
--- trunk/LinuxBIOSv2/src/northbridge/via/vt8601/raminit.c 2007-05-10
18:49:58 UTC (rev 2652)
+++ trunk/LinuxBIOSv2/src/northbridge/via/vt8601/raminit.c 2007-05-10
19:02:19 UTC (rev 2653)
@@ -377,18 +377,22 @@
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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