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| author | Bob Moore <robert.moore@intel.com> | 2011-11-16 10:57:28 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-01-17 03:36:28 -0500 |
| commit | 22e5b40ab21fcac21db0ff25fbb844ffecc73a4a (patch) | |
| tree | 6fe339a8c410d2f8f2a0f844c976046d3be47e17 /drivers/acpi/acpica/tbutils.c | |
| parent | 2355e10f07b2c550c671f98b68aedf323c299aeb (diff) | |
| download | blackbird-obmc-linux-22e5b40ab21fcac21db0ff25fbb844ffecc73a4a.tar.gz blackbird-obmc-linux-22e5b40ab21fcac21db0ff25fbb844ffecc73a4a.zip | |
ACPI 5.0: Implement hardware-reduced option
If HW-reduced flag is set in the FADT, do not attempt to access
or initialize any ACPI hardware, including SCI and global lock.
No FACS will be present.
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>
Diffstat (limited to 'drivers/acpi/acpica/tbutils.c')
| -rw-r--r-- | drivers/acpi/acpica/tbutils.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c index 0f2d395feaba..da56a1908966 100644 --- a/drivers/acpi/acpica/tbutils.c +++ b/drivers/acpi/acpica/tbutils.c @@ -135,6 +135,13 @@ acpi_status acpi_tb_initialize_facs(void) { acpi_status status; + /* If Hardware Reduced flag is set, there is no FACS */ + + if (acpi_gbl_reduced_hardware) { + acpi_gbl_FACS = NULL; + return (AE_OK); + } + status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, ACPI_CAST_INDIRECT_PTR(struct acpi_table_header, |
