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ACPICA: Emit warning if two FACS or DSDT tables found in the FADT

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Checks if there are two valid but different addresses for the
FACS and DSDT within the FADT (mismatch between the 32-bit and
64-bit fields.)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2008-11-12 15:23:20 +08:00 committed by Len Brown
parent 34830726c9
commit c87609f31a
1 changed files with 15 additions and 2 deletions
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17
drivers/acpi/tables/tbfadt.c
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@ -286,14 +286,27 @@ static void acpi_tb_convert_fadt(void)
acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt);
/* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary */
/*
* Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary.
* Later code will always use the X 64-bit field. Also, check for an
* address mismatch between the 32-bit and 64-bit address fields
* (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate
* the presence of two FACS or two DSDT tables.
*/
if (!acpi_gbl_FADT.Xfacs) {
acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs;
} else if (acpi_gbl_FADT.facs &&
(acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) {
ACPI_WARNING((AE_INFO,
"32/64 FACS address mismatch in FADT - two FACS tables!"));
}
if (!acpi_gbl_FADT.Xdsdt) {
acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt;
} else if (acpi_gbl_FADT.dsdt &&
(acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) {
ACPI_WARNING((AE_INFO,
"32/64 DSDT address mismatch in FADT - two DSDT tables!"));
}
/*