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x86: create space in bios memory map

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As of now, we mark the top 1MB of memory space as unusable. Part of
it is actually usable and is required to be marked so by some of the
newer versions of linux kernel. This patch marks the top 639KB as usable.
This value was chosen by looking at QEMU's output for bios memory map.
This commit is contained in:
Nilay Vaish 2013-03-28 09:34:15 -05:00
parent 1af9369779
commit 433cab9d95
1 changed files with 2 additions and 1 deletions
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3
configs/common/FSConfig.py
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@ -536,7 +536,8 @@ def makeLinuxX86System(mem_mode, numCPUs = 1, mdesc = None, Ruby = False):
self.e820_table.entries = \
[
# Mark the first megabyte of memory as reserved
X86E820Entry(addr = 0, size = '1MB', range_type = 2),
X86E820Entry(addr = 0, size = '639kB', range_type = 1),
X86E820Entry(addr = 0x9fc00, size = '385kB', range_type = 2),
# Mark the rest as available
X86E820Entry(addr = 0x100000,
size = '%dB' % (phys_mem_size - 0x100000),