diff options
author | Len Brown <len.brown@intel.com> | 2007-11-23 20:08:02 -0500 |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2007-12-14 02:36:24 -0500 |
commit | 239665a3bb0a2234980f918913add31bc536cfd1 (patch) | |
tree | 260262706ce5223bf3d1cec0e8083ea42260f2fb /include/linux/acpi.h | |
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 'include/linux/acpi.h')
-rw-r--r-- | include/linux/acpi.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 8ccedf7a0a5a..8deb61171558 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h | |||
@@ -79,7 +79,6 @@ typedef int (*acpi_table_handler) (struct acpi_table_header *table); | |||
79 | typedef int (*acpi_table_entry_handler) (struct acpi_subtable_header *header, const unsigned long end); | 79 | typedef int (*acpi_table_entry_handler) (struct acpi_subtable_header *header, const unsigned long end); |
80 | 80 | ||
81 | char * __acpi_map_table (unsigned long phys_addr, unsigned long size); | 81 | char * __acpi_map_table (unsigned long phys_addr, unsigned long size); |
82 | unsigned long acpi_find_rsdp (void); | ||
83 | int acpi_boot_init (void); | 82 | int acpi_boot_init (void); |
84 | int acpi_boot_table_init (void); | 83 | int acpi_boot_table_init (void); |
85 | int acpi_numa_init (void); | 84 | int acpi_numa_init (void); |