diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2016-10-15 23:29:18 +0200 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-10-19 17:04:10 +0200 |
| commit | e1897616038f78015633134fc38e351c33a46975 (patch) | |
| tree | b6259a84489d76e54b7d87daf7b5834fc001dc68 /src | |
| parent | 3baa7e707388306d81beac7cc34634e4d831da6d (diff) | |
nb/i945/raminit: Add fix for 1067MHz FSB CPUs
Previously the 945gc raminit only worked for 533MHz FSB CPUs.
This extends the tRD_Mclks in drt0_table for other FSB speeds. The values are
taken from the vendor bios of Gigabyte ga-945gcm-s2l.
The result is that 1067MHz FSB CPUs now boot without problems.
800MHz FSB cpus still don't get past romstage.
Change-Id: I13a6b97d2e580512155edf66c48405a153121957
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/17034
Tested-by: build bot (Jenkins)
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src')
| -rw-r--r-- | src/northbridge/intel/i945/raminit.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/src/northbridge/intel/i945/raminit.c b/src/northbridge/intel/i945/raminit.c index 6ca95ee220..1ec2dc5ef4 100644 --- a/src/northbridge/intel/i945/raminit.c +++ b/src/northbridge/intel/i945/raminit.c @@ -1713,9 +1713,12 @@ static void sdram_set_timing_and_control(struct sys_info *sysinfo) static const u8 drt0_table[] = { /* CL 3, 4, 5 */ - 3, 4, 5, /* FSB533/400, DDR533/400 */ - 4, 5, 6, /* FSB667, DDR533/400 */ - 4, 5, 6, /* FSB667, DDR667 */ + 3, 4, 5, /* FSB533, DDR667/533/400 */ + 4, 5, 6, /* FSB667, DDR667/533/400 */ + 5, 6, 7, /* FSB800, DDR400/533 */ + 6, 7, 8, /* FSB800, DDR667 */ + 5, 6, 7, /* FSB1066, DDR400 */ + 7, 8, 9, /* FSB1066, DDR533/DDR667 */ }; static const u8 cas_table[] = { @@ -1772,12 +1775,29 @@ static void sdram_set_timing_and_control(struct sys_info *sysinfo) /* Program Write Auto Precharge to Activate */ off32 = 0; - if (sysinfo->fsb_frequency == 667) { /* 667MHz FSB */ - off32 += 3; - } - if (sysinfo->memory_frequency == 667) { - off32 += 3; + switch (sysinfo->fsb_frequency) { + case 533: + off32 = 0; + break; + case 667: + off32 = 3; + break; + case 800: + if (sysinfo->memory_frequency <= 533) { + off32 = 6; + break; + } + off32 = 9; + break; + case 1066: + if (sysinfo->memory_frequency == 400) { + off32 = 12; + break; + } + off32 = 15; + break; } + off32 += sysinfo->cas - 3; reg32 = drt0_table[off32]; temp_drt |= (reg32 << 11); |