diff options
Diffstat (limited to 'drivers/acpi/utilities/utxface.c')
| -rw-r--r-- | drivers/acpi/utilities/utxface.c | 52 |
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, |