diff options
| -rw-r--r-- | src/northbridge/via/vt8601/raminit.c | 28 |
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"); |