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| author | Bob Moore <robert.moore@intel.com> | 2014-01-08 13:43:46 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-01-08 15:31:36 +0100 |
| commit | 0249ed2444d65d65fc3f3f64f398f1ad0b7e54cd (patch) | |
| tree | 98217f25d2eda9cdd96d4f386021e7228d04f30a /drivers/acpi/acpica/acglobal.h | |
| parent | fab4610583855d544394320d47fccb43305a6398 (diff) | |
| download | linux-0249ed2444d65d65fc3f3f64f398f1ad0b7e54cd.tar.bz2 | |
ACPICA: Add option to favor 32-bit FADT addresses.
This change adds an option to favor 32-bit FADT addresses when there
is a conflict between the 32-bit and 64-bit versions of the same
address. The default behavior is to use the 64-bit version in accordance
with the ACPI specification. This can now be overridden via the
AcpiGbl_Use32BitFadtAddresses flag. Lv Zheng.
Also, the "Convert FADT" and "Verify FADT" functions have been merged to
simplify the code, make it easier to understand, and make it easier to
maintain. Bob Moore.
References: https://bugs.acpica.org/show_bug.cgi?id=885
References: https://bugs.acpica.org/show_bug.cgi?id=993
Original-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/acglobal.h')
| -rw-r--r-- | drivers/acpi/acpica/acglobal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index cffb45742aa5..268699879904 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -127,6 +127,16 @@ u8 ACPI_INIT_GLOBAL(acpi_gbl_copy_dsdt_locally, FALSE); u8 ACPI_INIT_GLOBAL(acpi_gbl_do_not_use_xsdt, FALSE); /* + * Optionally use 32-bit FADT addresses if and when there is a conflict + * (address mismatch) between the 32-bit and 64-bit versions of the + * address. Although ACPICA adheres to the ACPI specification which + * requires the use of the corresponding 64-bit address if it is non-zero, + * some machines have been found to have a corrupted non-zero 64-bit + * address. Default is FALSE, do not favor the 32-bit addresses. + */ +u8 ACPI_INIT_GLOBAL(acpi_gbl_use32_bit_fadt_addresses, FALSE); + +/* * Optionally truncate I/O addresses to 16 bits. Provides compatibility * with other ACPI implementations. NOTE: During ACPICA initialization, * this value is set to TRUE if any Windows OSI strings have been |