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| author | Keith Hui <buurin@gmail.com> | 2010-03-13 20:16:48 +0000 |
|---|---|---|
| committer | Uwe Hermann <uwe@hermann-uwe.de> | 2010-03-13 20:16:48 +0000 |
| commit | 9c1e1f0d3a562d6f1fb1a1bad5a8f58f62bf4613 (patch) | |
| tree | 6de7fe916008931e6b9ed253a30849fd5ca11ebd /src/northbridge | |
| parent | f7f9e92b4235169974c8f314ff6a921a0b7c4f9e (diff) | |
| download | coreboot-9c1e1f0d3a562d6f1fb1a1bad5a8f58f62bf4613.tar.xz | |
Add SDRAMPWR_4DIMM Kconfig option (not user-visible in menuconfig).
Each Intel 440BX board should select this option if it has 4 DIMM
slots on the PCB, and _not_ select it (it defaults to 'n') if it
has 3 DIMMs on the PCB.
Signed-off-by: Keith Hui <buurin@gmail.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5204 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/i440bx/Kconfig | 13 | ||||
| -rw-r--r-- | src/northbridge/intel/i440bx/raminit.c | 6 |
2 files changed, 18 insertions, 1 deletions
diff --git a/src/northbridge/intel/i440bx/Kconfig b/src/northbridge/intel/i440bx/Kconfig index 696e884705..4de84d3472 100644 --- a/src/northbridge/intel/i440bx/Kconfig +++ b/src/northbridge/intel/i440bx/Kconfig @@ -22,3 +22,16 @@ config NORTHBRIDGE_INTEL_I440BX bool select HAVE_HIGH_TABLES +config SDRAMPWR_4DIMM + bool + depends on NORTHBRIDGE_INTEL_I440BX + default n + help + This option affects how the SDRAMC register is programmed. + Memory clock signals will not be routed properly if this option + is set wrong. + + If your board has 4 DIMM slots, you must use select this option, in + your Kconfig file of the board. On boards with 3 DIMM slots, + do _not_ select this option. + diff --git a/src/northbridge/intel/i440bx/raminit.c b/src/northbridge/intel/i440bx/raminit.c index 3de2dd7021..43e2a45e99 100644 --- a/src/northbridge/intel/i440bx/raminit.c +++ b/src/northbridge/intel/i440bx/raminit.c @@ -292,7 +292,11 @@ static const long register_values[] = { * 0 = 3 clocks of RAS# precharge * 1 = 2 clocks of RAS# precharge */ - SDRAMC + 0, 0x00, 0x00, +#if CONFIG_SDRAMPWR_4DIMM + SDRAMC + 0, 0x00, 0x10, /* The board has 4 DIMM slots. */ +#else + SDRAMC + 0, 0x00, 0x00, /* The board has 3 DIMM slots.*/ +#endif SDRAMC + 1, 0x00, 0x00, /* PGPOL - Paging Policy Register |