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Diffstat (limited to 'tools/power/acpi/os_specific/service_layers/oslinuxtbl.c')
-rw-r--r--tools/power/acpi/os_specific/service_layers/oslinuxtbl.c32
1 files changed, 27 insertions, 5 deletions
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
index a8cd344d621b..e0699e6e1f26 100644
--- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
+++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
@@ -505,6 +505,28 @@ static acpi_status osl_load_rsdp(void)
/******************************************************************************
*
+ * FUNCTION: osl_can_use_xsdt
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: TRUE if XSDT is allowed to be used.
+ *
+ * DESCRIPTION: This function collects logic that can be used to determine if
+ * XSDT should be used instead of RSDT.
+ *
+ *****************************************************************************/
+
+static u8 osl_can_use_xsdt(void)
+{
+ if (gbl_revision && !acpi_gbl_do_not_use_xsdt) {
+ return (TRUE);
+ } else {
+ return (FALSE);
+ }
+}
+
+/******************************************************************************
+ *
* FUNCTION: osl_table_initialize
*
* PARAMETERS: None
@@ -535,7 +557,7 @@ static acpi_status osl_table_initialize(void)
/* Get XSDT from memory */
- if (gbl_rsdp.revision) {
+ if (gbl_rsdp.revision && !gbl_do_not_dump_xsdt) {
if (gbl_xsdt) {
free(gbl_xsdt);
gbl_xsdt = NULL;
@@ -668,7 +690,7 @@ static acpi_status osl_list_bios_tables(void)
acpi_status status = AE_OK;
u32 i;
- if (gbl_revision) {
+ if (osl_can_use_xsdt()) {
item_size = sizeof(u64);
table_data =
ACPI_CAST8(gbl_xsdt) + sizeof(struct acpi_table_header);
@@ -690,7 +712,7 @@ static acpi_status osl_list_bios_tables(void)
/* Search RSDT/XSDT for the requested table */
for (i = 0; i < number_of_tables; ++i, table_data += item_size) {
- if (gbl_revision) {
+ if (osl_can_use_xsdt()) {
table_address =
(acpi_physical_address) (*ACPI_CAST64(table_data));
} else {
@@ -809,7 +831,7 @@ osl_get_bios_table(char *signature,
table_length = ap_get_table_length(mapped_table);
} else { /* Case for a normal ACPI table */
- if (gbl_revision) {
+ if (osl_can_use_xsdt()) {
item_size = sizeof(u64);
table_data =
ACPI_CAST8(gbl_xsdt) +
@@ -833,7 +855,7 @@ osl_get_bios_table(char *signature,
/* Search RSDT/XSDT for the requested table */
for (i = 0; i < number_of_tables; ++i, table_data += item_size) {
- if (gbl_revision) {
+ if (osl_can_use_xsdt()) {
table_address =
(acpi_physical_address) (*ACPI_CAST64
(table_data));