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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 <hawke@hawkesnest.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2653 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Alex Mauer 2007-05-10 19:02:19 +00:00 committed by Stefan Reinauer
parent 1346a27dee
commit f05e85b390
1 changed files with 16 additions and 12 deletions
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28
src/northbridge/via/vt8601/raminit.c
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@ -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");