diff options
| author | Anders Jenbo <anders@jenbo.dk> | 2010-04-27 08:45:30 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2010-04-27 08:45:30 +0000 |
| commit | 771b0e42280ac688ddfae654b3df9582c3caaf6f (patch) | |
| tree | 9ac3b2fb8fc73a13da89467f8428871e2f7fbf4c | |
| parent | 14e22779625de673569c7b950ecc2753fb915b31 (diff) | |
Enable 440BX NB to use large memory modules
Signed-off-by: Anders Jenbo <anders@jenbo.dk>
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5508 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
| -rw-r--r-- | src/northbridge/intel/i440bx/raminit.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/src/northbridge/intel/i440bx/raminit.c b/src/northbridge/intel/i440bx/raminit.c index d5ade1a121..eceaaee4eb 100644 --- a/src/northbridge/intel/i440bx/raminit.c +++ b/src/northbridge/intel/i440bx/raminit.c @@ -694,6 +694,23 @@ static struct dimm_size spd_get_dimm_size(unsigned int device) sz.side1 *= 4; sz.side2 *= 4; + /* It is possible to partially use larger then supported + * modules by setting them to a supported size. + */ + if(sz.side1 > 128) { + PRINT_DEBUG("Side1 was 0x"); + PRINT_DEBUG_HEX16(sz.side1); + PRINT_DEBUG(" but only 128MB will be used.\n"); + sz.side1 = 128; + + if(sz.side2 > 128) { + PRINT_DEBUG("Side2 was 0x"); + PRINT_DEBUG_HEX16(sz.side2); + PRINT_DEBUG(" but only 128MB will be used.\n"); + sz.side2 = 128; + } + } + return sz; } /* @@ -792,6 +809,12 @@ static void set_dram_row_attributes(void) dra = 0x1; /* 4KB */ } else if (dra == 8) { dra = 0x2; /* 8KB */ + } else if (dra >= 16) { + /* Page sizes larger than supported are + * set to 8KB to use module partially. + */ + PRINT_DEBUG("Page size forced to 8KB.\n"); + dra = 0x2; /* 8KB */ } else { dra = -1; } @@ -808,6 +831,10 @@ static void set_dram_row_attributes(void) dra = 0x05; /* 4KB */ } else if (dra == 8) { dra = 0x0a; /* 8KB */ + } else if (dra >= 16) { + /* Ditto */ + PRINT_DEBUG("Page size forced to 8KB.\n"); + dra = 0x0a; /* 8KB */ } else { dra = -1; } @@ -826,7 +853,7 @@ static void set_dram_row_attributes(void) /* * 440BX supports asymmetrical dual-sided DIMMs, * but can't handle DIMMs smaller than 8MB per - * side or larger than 128MB per side. + * side. */ struct dimm_size sz = spd_get_dimm_size(device); if ((sz.side1 < 8)) { @@ -834,11 +861,6 @@ static void set_dram_row_attributes(void) "are not supported on this NB.\n"); die("HALT\n"); } - if ((sz.side1 > 128)) { - print_err("DIMMs > 128MB per side\n" - "are not supported on this NB\n"); - die("HALT\n"); - } /* Divide size by 8 to set up the DRB registers. */ drb += (sz.side1 / 8); |