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ACPICA: Update DSDT copy/detection.

Sfoglia il codice sorgente 
Move initialization of DSDT pointer. Emit address of DSDT
in the dump of both table headers (good/bad DSDT).
Now handles the case where the root table can be reallocated,
which would invalidate the original pointer.

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
2010-04-07 11:05:11 +08:00
committato da Len Brown
parent 69ec87efa8
commit 43323cb4c4
5 ha cambiato i file con 38 aggiunte e 19 eliminazioni
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29
drivers/acpi/acpica/tbxface.c
Vedi File

@@ -513,24 +513,38 @@ static acpi_status acpi_tb_load_namespace(void)
{
acpi_status status;
u32 i;
struct acpi_table_header *new_dsdt;
ACPI_FUNCTION_TRACE(tb_load_namespace);
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
acpi_gbl_DSDT = &acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT];
/*
* Load the namespace. The DSDT is required, but any SSDT and
* PSDT tables are optional. Verify the DSDT.
*/
if (!acpi_gbl_root_table_list.count ||
!ACPI_COMPARE_NAME(&acpi_gbl_DSDT->signature, ACPI_SIG_DSDT) ||
ACPI_FAILURE(acpi_tb_verify_table(acpi_gbl_DSDT))) {
!ACPI_COMPARE_NAME(&
(acpi_gbl_root_table_list.
tables[ACPI_TABLE_INDEX_DSDT].signature),
ACPI_SIG_DSDT)
||
ACPI_FAILURE(acpi_tb_verify_table
(&acpi_gbl_root_table_list.
tables[ACPI_TABLE_INDEX_DSDT]))) {
status = AE_NO_ACPI_TABLES;
goto unlock_and_exit;
}
/*
* Save the DSDT pointer for simple access. This is the mapped memory
* address. We must take care here because the address of the .Tables
* array can change dynamically as tables are loaded at run-time. Note:
* .Pointer field is not validated until after call to acpi_tb_verify_table.
*/
acpi_gbl_DSDT =
acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer;
/*
* Optionally copy the entire DSDT to local memory (instead of simply
* mapping it.) There are some BIOSs that corrupt or replace the original
@@ -538,14 +552,17 @@ static acpi_status acpi_tb_load_namespace(void)
* the DSDT.
*/
if (acpi_gbl_copy_dsdt_locally) {
acpi_tb_copy_dsdt(acpi_gbl_DSDT);
new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT);
if (new_dsdt) {
acpi_gbl_DSDT = new_dsdt;
}
}
/*
* Save the original DSDT header for detection of table corruption
* and/or replacement of the DSDT from outside the OS.
*/
ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT->pointer,
ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT,
sizeof(struct acpi_table_header));
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);