diff options
author | Len Brown <len.brown@intel.com> | 2007-11-23 20:08:02 -0500 |
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committer | Len Brown <len.brown@intel.com> | 2007-12-14 02:36:24 -0500 |
commit | 239665a3bb0a2234980f918913add31bc536cfd1 (patch) | |
tree | 260262706ce5223bf3d1cec0e8083ea42260f2fb /arch/x86/kernel/cpu/cpufreq | |
parent | 2ffbb8377c7a0713baf6644e285adc27a5654582 (diff) |
ACPI: tables: complete searching upon RSDP w/ bad checksum.
ACPI tables follow a tree structure in memory.
The root of the tree is the RSDP (Root System Description Pointer).
To find the RSDP, the OS searches for the signature "RSD PTR "
in well known physical memory locations. Then the OS computes
a table checksum to verify that the signature is really part
of a valid table header.
Some systems have a proper signature but an invalid checksum;
followed elsewhere by a proper signature with valid checksum.
http://bugzilla.kernel.org/show_bug.cgi?id=9444
The Linux RSDP scanning code bailed out on those systems
and as a result they booted with ACPI disabled.
Fix this by deleting the Linux RSDP scanning code and
plugging in the ACPICA RSDP scanning code.
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq')
0 files changed, 0 insertions, 0 deletions