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path: root/drivers/acpi/utilities/utxface.c
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Diffstat (limited to 'drivers/acpi/utilities/utxface.c')
-rw-r--r--drivers/acpi/utilities/utxface.c52
1 files changed, 38 insertions, 14 deletions
diff --git a/drivers/acpi/utilities/utxface.c b/drivers/acpi/utilities/utxface.c
index f06bd5e5e9d1..57adc5bc02f3 100644
--- a/drivers/acpi/utilities/utxface.c
+++ b/drivers/acpi/utilities/utxface.c
@@ -178,10 +178,14 @@ acpi_status acpi_enable_subsystem(u32 flags)
/*
* Initialize ACPI Event handling (Fixed and General Purpose)
*
- * NOTE: We must have the hardware AND events initialized before we can
- * execute ANY control methods SAFELY. Any control method can require
- * ACPI hardware support, so the hardware MUST be initialized before
- * execution!
+ * Note1: We must have the hardware and events initialized before we can
+ * execute any control methods safely. Any control method can require
+ * ACPI hardware support, so the hardware must be fully initialized before
+ * any method execution!
+ *
+ * Note2: Fixed events are initialized and enabled here. GPEs are
+ * initialized, but cannot be enabled until after the hardware is
+ * completely initialized (SCI and global_lock activated)
*/
if (!(flags & ACPI_NO_EVENT_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
@@ -193,8 +197,10 @@ acpi_status acpi_enable_subsystem(u32 flags)
}
}
- /* Install the SCI handler and Global Lock handler */
-
+ /*
+ * Install the SCI handler and Global Lock handler. This completes the
+ * hardware initialization.
+ */
if (!(flags & ACPI_NO_HANDLER_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Installing SCI/GL handlers\n"));
@@ -205,6 +211,24 @@ acpi_status acpi_enable_subsystem(u32 flags)
}
}
+ /*
+ * Complete the GPE initialization for the GPE blocks defined in the FADT
+ * (GPE block 0 and 1).
+ *
+ * Note1: This is where the _PRW methods are executed for the GPEs. These
+ * methods can only be executed after the SCI and Global Lock handlers are
+ * installed and initialized.
+ *
+ * Note2: Currently, there seems to be no need to run the _REG methods
+ * before execution of the _PRW methods and enabling of the GPEs.
+ */
+ if (!(flags & ACPI_NO_EVENT_INIT)) {
+ status = acpi_ev_install_fadt_gpes();
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+ }
+
return_ACPI_STATUS(status);
}
@@ -230,9 +254,9 @@ acpi_status acpi_initialize_objects(u32 flags)
/*
* Run all _REG methods
*
- * NOTE: Any objects accessed
- * by the _REG methods will be automatically initialized, even if they
- * contain executable AML (see call to acpi_ns_initialize_objects below).
+ * Note: Any objects accessed by the _REG methods will be automatically
+ * initialized, even if they contain executable AML (see the call to
+ * acpi_ns_initialize_objects below).
*/
if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
@@ -245,9 +269,9 @@ acpi_status acpi_initialize_objects(u32 flags)
}
/*
- * Initialize the objects that remain uninitialized. This
- * runs the executable AML that may be part of the declaration of these
- * objects: operation_regions, buffer_fields, Buffers, and Packages.
+ * Initialize the objects that remain uninitialized. This runs the
+ * executable AML that may be part of the declaration of these objects:
+ * operation_regions, buffer_fields, Buffers, and Packages.
*/
if (!(flags & ACPI_NO_OBJECT_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
@@ -260,8 +284,8 @@ acpi_status acpi_initialize_objects(u32 flags)
}
/*
- * Initialize all device objects in the namespace
- * This runs the _STA and _INI methods.
+ * Initialize all device objects in the namespace. This runs the device
+ * _STA and _INI methods.
*/
if (!(flags & ACPI_NO_DEVICE_INIT)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,