diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/olpc/rev_a/auto.c | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/src/mainboard/olpc/rev_a/auto.c b/src/mainboard/olpc/rev_a/auto.c index 4775b8c9fe..ea86d34497 100644 --- a/src/mainboard/olpc/rev_a/auto.c +++ b/src/mainboard/olpc/rev_a/auto.c @@ -48,11 +48,11 @@ static inline unsigned int fls(unsigned int x) d0_MB=1 (module banks) d0_cb=4 (component banks) do_psz=4KB (page size) - Trc=10 (clocks) - Tras=7 - Trcd=3 - Trp=3 - Trrd=2 + Trc=10 (clocks) (ref2act) + Tras=7 (act2pre) + Trcd=3 (act2cmd) + Trp=3 (pre2act) + Trrd=2 (act2act) Tref=17.8ms */ static void sdram_set_spd_registers(const struct mem_controller *ctrl) @@ -78,17 +78,15 @@ static void sdram_set_spd_registers(const struct mem_controller *ctrl) val >>= 2; msr.hi &= ~(0x1 << CF07_UPPER_D0_CB_SHIFT); msr.hi |= (val << CF07_UPPER_D0_CB_SHIFT); -HERE + /* get the module bank density, SPD byte 31 */ - val = spd_read_byte(0xA0, 31); - val = fls(val); - val <<= module_banks; + /* this is multiples of 8 MB */ + val = 128 / 8; msr.hi &= ~(0xf << CF07_UPPER_D0_SZ_SHIFT); msr.hi |= (val << CF07_UPPER_D0_SZ_SHIFT); /* page size = 2^col address */ - val = spd_read_byte(0xA0, 4); - val -= 7; + val = 2; /* 4096 bytes */ msr.hi &= ~(0x7 << CF07_UPPER_D0_PSZ_SHIFT); msr.hi |= (val << CF07_UPPER_D0_PSZ_SHIFT); @@ -99,9 +97,23 @@ HERE msr.lo = 0x00003000; wrmsr(MC_CF07_DATA, msr); + /* timing and mode ... */ + msr = rdmsr(0x20000019); - msr.hi = 0x18000108; - msr.lo = 0x696332a3; + + /* per standard bios settings */ + + msr.lo = + (6<<28) | // cas_lat + (10<<24)| // ref2act + (7<<20)| // act2pre + (3<<16)| // pre2act + (3<<12)| // act2cmd + (2<<8)| // act2act + (2<<6)| // dplwr + (2<<4)| // dplrd + (3); // dal + wrmsr(0x20000019, msr); } |