diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/hardware/hwsleep.c | 54 |
1 files changed, 32 insertions, 22 deletions
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c index 25dccdf179b9..6a30c8095ff1 100644 --- a/drivers/acpi/hardware/hwsleep.c +++ b/drivers/acpi/hardware/hwsleep.c @@ -52,16 +52,16 @@ ACPI_MODULE_NAME("hwsleep") * * FUNCTION: acpi_set_firmware_waking_vector * - * PARAMETERS: physical_address - Physical address of ACPI real mode + * PARAMETERS: physical_address - 32-bit physical address of ACPI real mode * entry point. * * RETURN: Status * - * DESCRIPTION: Access function for the firmware_waking_vector field in FACS + * DESCRIPTION: Sets the 32-bit firmware_waking_vector field of the FACS * ******************************************************************************/ acpi_status -acpi_set_firmware_waking_vector(acpi_physical_address physical_address) +acpi_set_firmware_waking_vector(u32 physical_address) { struct acpi_table_facs *facs; acpi_status status; @@ -85,10 +85,16 @@ acpi_set_firmware_waking_vector(acpi_physical_address physical_address) * Protected Mode. Some systems (for example HP dv5-1004nr) are known * to fail to resume if the 64-bit vector is used. */ - if (facs->version >= 1) - facs->xfirmware_waking_vector = 0; - facs->firmware_waking_vector = (u32)physical_address; + /* Set the 32-bit vector */ + + facs->firmware_waking_vector = physical_address; + + /* Clear the 64-bit vector if it exists */ + + if ((facs->length > 32) && (facs->version >= 1)) { + facs->xfirmware_waking_vector = 0; + } return_ACPI_STATUS(AE_OK); } @@ -97,29 +103,25 @@ ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector) /******************************************************************************* * - * FUNCTION: acpi_get_firmware_waking_vector + * FUNCTION: acpi_set_firmware_waking_vector64 * - * PARAMETERS: *physical_address - Where the contents of - * the firmware_waking_vector field of - * the FACS will be returned. + * PARAMETERS: physical_address - 64-bit physical address of ACPI protected + * mode entry point. * - * RETURN: Status, vector + * RETURN: Status * - * DESCRIPTION: Access function for the firmware_waking_vector field in FACS + * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if + * it exists in the table. * ******************************************************************************/ -#ifdef ACPI_FUTURE_USAGE acpi_status -acpi_get_firmware_waking_vector(acpi_physical_address * physical_address) +acpi_set_firmware_waking_vector64(u64 physical_address) { struct acpi_table_facs *facs; acpi_status status; - ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector); + ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector64); - if (!physical_address) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } /* Get the FACS */ @@ -131,14 +133,22 @@ acpi_get_firmware_waking_vector(acpi_physical_address * physical_address) return_ACPI_STATUS(status); } - /* Get the vector */ - *physical_address = (acpi_physical_address)facs->firmware_waking_vector; + /* Determine if the 64-bit vector actually exists */ + + if ((facs->length <= 32) || (facs->version < 1)) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + /* Clear 32-bit vector, set the 64-bit X_ vector */ + + facs->firmware_waking_vector = 0; + facs->xfirmware_waking_vector = physical_address; return_ACPI_STATUS(AE_OK); } -ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector) -#endif +ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64) + /******************************************************************************* * * FUNCTION: acpi_enter_sleep_state_prep |