x86, intel_txt: clean up the impact on generic code, unbreak non-x86
[linux-2.6.git] / drivers / acpi / acpica / hwsleep.c
index 54dd3ee..cc22f9a 100644 (file)
@@ -43,8 +43,9 @@
  */
 
 #include <acpi/acpi.h>
-#include <acpi/accommon.h>
-#include <acpi/actables.h>
+#include "accommon.h"
+#include "actables.h"
+#include <linux/tboot.h>
 
 #define _COMPONENT          ACPI_HARDWARE
 ACPI_MODULE_NAME("hwsleep")
@@ -90,6 +91,7 @@ acpi_set_firmware_waking_vector(u32 physical_address)
 
 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
 
+#if ACPI_MACHINE_WIDTH == 64
 /*******************************************************************************
  *
  * FUNCTION:    acpi_set_firmware_waking_vector64
@@ -100,7 +102,8 @@ ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
  * RETURN:      Status
  *
  * DESCRIPTION: Sets the 64-bit X_firmware_waking_vector field of the FACS, if
- *              it exists in the table.
+ *              it exists in the table. This function is intended for use with
+ *              64-bit host operating systems.
  *
  ******************************************************************************/
 acpi_status
@@ -124,6 +127,7 @@ acpi_set_firmware_waking_vector64(u64 physical_address)
 }
 
 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector64)
+#endif
 
 /*******************************************************************************
  *
@@ -147,9 +151,8 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 
        ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
 
-       /*
-        * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
-        */
+       /* _PSW methods could be run here to enable wake-on keyboard, LAN, etc. */
+
        status = acpi_get_sleep_type_data(sleep_state,
                                          &acpi_gbl_sleep_type_a,
                                          &acpi_gbl_sleep_type_b);
@@ -209,6 +212,12 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 
 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
 
+static unsigned int gts, bfs;
+module_param(gts, uint, 0644);
+module_param(bfs, uint, 0644);
+MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
+MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_enter_sleep_state
@@ -223,8 +232,8 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
  ******************************************************************************/
 acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 {
-       u32 PM1Acontrol;
-       u32 PM1Bcontrol;
+       u32 pm1a_control;
+       u32 pm1b_control;
        struct acpi_bit_register_info *sleep_type_reg_info;
        struct acpi_bit_register_info *sleep_enable_reg_info;
        u32 in_value;
@@ -242,13 +251,14 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
        }
 
        sleep_type_reg_info =
-           acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
+           acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
        sleep_enable_reg_info =
            acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
 
        /* Clear wake status */
 
-       status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+       status =
+           acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
@@ -275,38 +285,41 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
                return_ACPI_STATUS(status);
        }
 
-       /* Execute the _GTS method */
+       if (gts) {
+               /* Execute the _GTS method */
 
-       arg_list.count = 1;
-       arg_list.pointer = &arg;
-       arg.type = ACPI_TYPE_INTEGER;
-       arg.integer.value = sleep_state;
+               arg_list.count = 1;
+               arg_list.pointer = &arg;
+               arg.type = ACPI_TYPE_INTEGER;
+               arg.integer.value = sleep_state;
 
-       status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
-       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               return_ACPI_STATUS(status);
+               status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
+               if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+                       return_ACPI_STATUS(status);
+               }
        }
 
        /* Get current value of PM1A control */
 
-       status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
+       status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
+                                      &pm1a_control);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
        ACPI_DEBUG_PRINT((ACPI_DB_INIT,
                          "Entering sleep state [S%d]\n", sleep_state));
 
-       /* Clear SLP_EN and SLP_TYP fields */
+       /* Clear the SLP_EN and SLP_TYP fields */
 
-       PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
-                        sleep_enable_reg_info->access_bit_mask);
-       PM1Bcontrol = PM1Acontrol;
+       pm1a_control &= ~(sleep_type_reg_info->access_bit_mask |
+                         sleep_enable_reg_info->access_bit_mask);
+       pm1b_control = pm1a_control;
 
-       /* Insert SLP_TYP bits */
+       /* Insert the SLP_TYP bits */
 
-       PM1Acontrol |=
+       pm1a_control |=
            (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
-       PM1Bcontrol |=
+       pm1b_control |=
            (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
 
        /*
@@ -314,37 +327,27 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
         * poorly implemented hardware.
         */
 
-       /* Write #1: fill in SLP_TYP data */
-
-       status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
-                                       PM1Acontrol);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(status);
-       }
+       /* Write #1: write the SLP_TYP data to the PM1 Control registers */
 
-       status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
-                                       PM1Bcontrol);
+       status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
 
-       /* Insert SLP_ENABLE bit */
+       /* Insert the sleep enable (SLP_EN) bit */
 
-       PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
-       PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
+       pm1a_control |= sleep_enable_reg_info->access_bit_mask;
+       pm1b_control |= sleep_enable_reg_info->access_bit_mask;
 
-       /* Write #2: SLP_TYP + SLP_EN */
+       /* Flush caches, as per ACPI specification */
 
        ACPI_FLUSH_CPU_CACHE();
 
-       status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
-                                       PM1Acontrol);
-       if (ACPI_FAILURE(status)) {
-               return_ACPI_STATUS(status);
-       }
+       tboot_sleep(sleep_state, pm1a_control, pm1b_control);
+
+       /* Write #2: Write both SLP_TYP + SLP_EN */
 
-       status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
-                                       PM1Bcontrol);
+       status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
@@ -357,8 +360,8 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
                 * Wait ten seconds, then try again. This is to get S4/S5 to work on
                 * all machines.
                 *
-                * We wait so long to allow chipsets that poll this reg very slowly to
-                * still read the right value. Ideally, this block would go
+                * We wait so long to allow chipsets that poll this reg very slowly
+                * to still read the right value. Ideally, this block would go
                 * away entirely.
                 */
                acpi_os_stall(10000000);
@@ -374,7 +377,7 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
        /* Wait until we enter sleep state */
 
        do {
-               status = acpi_get_register_unlocked(ACPI_BITREG_WAKE_STATUS,
+               status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS,
                                                    &in_value);
                if (ACPI_FAILURE(status)) {
                        return_ACPI_STATUS(status);
@@ -408,7 +411,10 @@ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
 
        ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
 
-       status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+       /* Clear the wake status bit (PM1) */
+
+       status =
+           acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
        if (ACPI_FAILURE(status)) {
                return_ACPI_STATUS(status);
        }
@@ -435,12 +441,13 @@ acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
 
        ACPI_FLUSH_CPU_CACHE();
 
-       status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
+       status = acpi_hw_write_port(acpi_gbl_FADT.smi_command,
                                    (u32) acpi_gbl_FADT.S4bios_request, 8);
 
        do {
                acpi_os_stall(1000);
-               status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value);
+               status =
+                   acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
                if (ACPI_FAILURE(status)) {
                        return_ACPI_STATUS(status);
                }
@@ -471,8 +478,8 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
        acpi_status status;
        struct acpi_bit_register_info *sleep_type_reg_info;
        struct acpi_bit_register_info *sleep_enable_reg_info;
-       u32 PM1Acontrol;
-       u32 PM1Bcontrol;
+       u32 pm1a_control;
+       u32 pm1b_control;
 
        ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
 
@@ -486,53 +493,50 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
                                          &acpi_gbl_sleep_type_b);
        if (ACPI_SUCCESS(status)) {
                sleep_type_reg_info =
-                   acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
+                   acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
                sleep_enable_reg_info =
                    acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
 
                /* Get current value of PM1A control */
 
                status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
-                                              &PM1Acontrol);
+                                              &pm1a_control);
                if (ACPI_SUCCESS(status)) {
 
-                       /* Clear SLP_EN and SLP_TYP fields */
+                       /* Clear the SLP_EN and SLP_TYP fields */
 
-                       PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
-                                        sleep_enable_reg_info->
-                                        access_bit_mask);
-                       PM1Bcontrol = PM1Acontrol;
+                       pm1a_control &= ~(sleep_type_reg_info->access_bit_mask |
+                                         sleep_enable_reg_info->
+                                         access_bit_mask);
+                       pm1b_control = pm1a_control;
 
-                       /* Insert SLP_TYP bits */
+                       /* Insert the SLP_TYP bits */
 
-                       PM1Acontrol |=
-                           (acpi_gbl_sleep_type_a << sleep_type_reg_info->
-                            bit_position);
-                       PM1Bcontrol |=
-                           (acpi_gbl_sleep_type_b << sleep_type_reg_info->
-                            bit_position);
+                       pm1a_control |= (acpi_gbl_sleep_type_a <<
+                                        sleep_type_reg_info->bit_position);
+                       pm1b_control |= (acpi_gbl_sleep_type_b <<
+                                        sleep_type_reg_info->bit_position);
 
-                       /* Just ignore any errors */
+                       /* Write the control registers and ignore any errors */
 
-                       (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
-                                                    PM1Acontrol);
-                       (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
-                                                    PM1Bcontrol);
+                       (void)acpi_hw_write_pm1_control(pm1a_control,
+                                                       pm1b_control);
                }
        }
 
-       /* Execute the _BFS method */
+       if (bfs) {
+               /* Execute the _BFS method */
 
-       arg_list.count = 1;
-       arg_list.pointer = &arg;
-       arg.type = ACPI_TYPE_INTEGER;
-       arg.integer.value = sleep_state;
+               arg_list.count = 1;
+               arg_list.pointer = &arg;
+               arg.type = ACPI_TYPE_INTEGER;
+               arg.integer.value = sleep_state;
 
-       status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
-       if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-               ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
+               status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
+               if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+                       ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
+               }
        }
-
        return_ACPI_STATUS(status);
 }
 
@@ -603,19 +607,21 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
         * it to determine whether the system is rebooting or resuming. Clear
         * it for compatibility.
         */
-       acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
+       acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, 1);
 
        acpi_gbl_system_awake_and_running = TRUE;
 
        /* Enable power button */
 
        (void)
-           acpi_set_register(acpi_gbl_fixed_event_info
-                             [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1);
+           acpi_write_bit_register(acpi_gbl_fixed_event_info
+                             [ACPI_EVENT_POWER_BUTTON].
+                             enable_register_id, ACPI_ENABLE_EVENT);
 
        (void)
-           acpi_set_register(acpi_gbl_fixed_event_info
-                             [ACPI_EVENT_POWER_BUTTON].status_register_id, 1);
+           acpi_write_bit_register(acpi_gbl_fixed_event_info
+                             [ACPI_EVENT_POWER_BUTTON].
+                             status_register_id, ACPI_CLEAR_STATUS);
 
        arg.integer.value = ACPI_SST_WORKING;
        status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);