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haswell: don't add a 0-sized memory range resource 

It's possible that TOUUD can be 4GiB in a small physical memory
configuration. Therefore, don't add a 0-size memory range resouce
in that case.

Change-Id: I016616a9d9d615417038e9c847c354db7d872819
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2691
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Aaron Durbin 2013-01-08 10:10:33 -06:00 committed by Ronald G. Minnich
parent c2c97231e3
commit 5c66f08a3a
1 changed files with 2 additions and 1 deletions
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src/northbridge/intel/haswell/northbridge.c
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@ -397,6 +397,7 @@ static void mc_add_dram_resources(device_t dev)
/* 4GiB -> TOUUD */
base_k = 4096 * 1024; /* 4GiB */
size_k = (unsigned long)(mc_values[TOUUD_REG] >> 10) - base_k;
if (size_k > 0)
ram_resource(dev, index++, base_k, size_k);
mmio_resource(dev, index++, legacy_hole_base_k, legacy_hole_size_k);