diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2009-05-23 09:14:40 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2009-05-23 09:14:40 +0000 |
| commit | 85406bbb5f336a427ae14637b2be1e23b8a8f711 (patch) | |
| tree | 34ac1897f5231d10075f0e8a924ef0de28efee8c /sys | |
| parent | acb2ba7cbb3fedd280c0941a062dd5956ae13bd9 (diff) | |
Seems I confused Mb and MB and was in too much of a rush when I
added the DDR3 bits. Take into account more of the spd
data and compute DDR3 module size in a way similiar to
NetBSD so it comes out correctly.
Tested by Olivier Cherrier and Christian Stuermer.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/i2c/spdmem.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/sys/dev/i2c/spdmem.c b/sys/dev/i2c/spdmem.c index 41eca85e4fb..b69d7510d32 100644 --- a/sys/dev/i2c/spdmem.c +++ b/sys/dev/i2c/spdmem.c @@ -1,4 +1,4 @@ -/* $OpenBSD: spdmem.c,v 1.31 2009/02/22 13:45:11 jsg Exp $ */ +/* $OpenBSD: spdmem.c,v 1.32 2009/05/23 09:14:39 jsg Exp $ */ /* $NetBSD: spdmem.c,v 1.3 2007/09/20 23:09:59 xtraeme Exp $ */ /* @@ -204,6 +204,7 @@ /* Dual Data Rate 3 SDRAM */ #define SPDMEM_DDR3_MODTYPE 0x00 #define SPDMEM_DDR3_DENSITY 0x01 +#define SPDMEM_DDR3_MOD_ORG 0x04 #define SPDMEM_DDR3_DATAWIDTH 0x05 #define SPDMEM_DDR3_MTB_DIVIDEND 0x07 #define SPDMEM_DDR3_MTB_DIVISOR 0x08 @@ -211,6 +212,9 @@ #define SPDMEM_DDR3_THERMAL 0x1d #define SPDMEM_DDR3_DENSITY_CAPMASK 0x0f +#define SPDMEM_DDR3_MOD_ORG_CHIPWIDTH_MASK 0x07 +#define SPDMEM_DDR3_MOD_ORG_BANKS_SHIFT 3 +#define SPDMEM_DDR3_MOD_ORG_BANKS_MASK 0x07 #define SPDMEM_DDR3_DATAWIDTH_ECCMASK (1 << 3) #define SPDMEM_DDR3_DATAWIDTH_PRIMASK 0x07 #define SPDMEM_DDR3_THERMAL_PRESENT (1 << 7) @@ -687,14 +691,23 @@ spdmem_ddr3_decode(struct spdmem_softc *sc, struct spdmem *s) { const char *type; int dimm_size, cycle_time, d_clk, p_clk, bits; - uint8_t mtype, capacity, dividend, divisor; + uint8_t mtype, chipsize, dividend, divisor; + uint8_t datawidth, chipwidth, physbanks; type = spdmem_basic_types[s->sm_type]; - capacity = s->sm_data[SPDMEM_DDR3_DENSITY] & + chipsize = s->sm_data[SPDMEM_DDR3_DENSITY] & SPDMEM_DDR3_DENSITY_CAPMASK; - /* capacity in MB is 2^(x+8) which we can get by shifting */ - dimm_size = 2 << (capacity + 7); + datawidth = s->sm_data[SPDMEM_DDR3_DATAWIDTH] & + SPDMEM_DDR3_DATAWIDTH_PRIMASK; + chipwidth = s->sm_data[SPDMEM_DDR3_MOD_ORG] & + SPDMEM_DDR3_MOD_ORG_CHIPWIDTH_MASK; + physbanks = (s->sm_data[SPDMEM_DDR3_MOD_ORG] >> + SPDMEM_DDR3_MOD_ORG_BANKS_SHIFT) & SPDMEM_DDR3_MOD_ORG_BANKS_MASK; + + dimm_size = (chipsize + 28 - 20) - 3 + (datawidth + 3) - + (chipwidth + 2); + dimm_size = (1 << dimm_size) * (physbanks + 1); if (dimm_size < 1024) printf(" %dMB", dimm_size); |