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soc/intel/apollolake: Avoid marking 0xe0000-0xfffff region usable 

coreboot writes RDSP at 0xf0000. Since depthcharge wipes usable
memory regions before starting, kernel can't find RDSP.

Change-Id: I584bd5d24248cf38f46342615cf3b0252a821b2a
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14466
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Andrey Petrov 2016-04-21 14:59:12 -07:00 committed by Aaron Durbin
parent d047ab590e
commit 1ba068550d
1 changed files with 6 additions and 4 deletions
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10
src/soc/intel/apollolake/northbridge.c
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@ -109,8 +109,12 @@ static int mc_add_dram_resources(device_t dev, int index)
/* 0 - > 0xa0000: 640kb of DOS memory. Not enough for anybody nowadays */
ram_resource(dev, index++, 0, 640);
/* 0xc0000 -> top_of_ram, skipping the legacy VGA region */
base_k = 768;
/* 0xa0000 - 0xbffff: legacy VGA */
mmio_resource(dev, index++, 640, 128);
/* 0xc0000 -> 0xfffff: leave without e820 entry, as it has special uses */
/* 0x100000 -> top_of_ram */
base_k = 1024;
size_k = (tseg / KiB) - base_k;
ram_resource(dev, index++, base_k, size_k);
@ -128,8 +132,6 @@ static int mc_add_dram_resources(device_t dev, int index)
size_k = (touud / KiB) - base_k;
ram_resource(dev, index++, base_k, size_k);
/* 0xa0000 - 0xbffff: legacy VGA */
mmio_resource(dev, index++, 640, 128);
return index;
}