Exemple #1
0
/* System is really put into sleep state by this stub */
acpi_status acpi_enter_sleep_state(u8 sleep_state)
{
    acpi_status status;

    if ( tboot_in_measured_env() )
    {
        tboot_sleep(sleep_state);
        printk(XENLOG_ERR "TBOOT failed entering s3 state\n");
        return_ACPI_STATUS(AE_ERROR);
    }

    ACPI_FLUSH_CPU_CACHE();

    status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL, 
                                    acpi_sinfo.pm1a_cnt_val);
    if ( ACPI_FAILURE(status) )
        return_ACPI_STATUS(AE_ERROR);

    if ( acpi_sinfo.pm1b_cnt_blk.address )
    {
        status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL, 
                                        acpi_sinfo.pm1b_cnt_val);
        if ( ACPI_FAILURE(status) )
            return_ACPI_STATUS(AE_ERROR);
    }

    /* Wait until we enter sleep state, and spin until we wake */
    while ( !acpi_get_wake_status() )
        continue;

    return_ACPI_STATUS(AE_OK);
}
Exemple #2
0
/* System is really put into sleep state by this stub */
acpi_status acpi_enter_sleep_state(u8 sleep_state)
{
    acpi_status status;

    if ( tboot_in_measured_env() )
    {
        tboot_sleep(sleep_state);
        printk(XENLOG_ERR "TBOOT failed entering s3 state\n");
        return_ACPI_STATUS(AE_ERROR);
    }

    ACPI_FLUSH_CPU_CACHE();

    if ( acpi_sinfo.sleep_extended )
    {
        /*
         * Set the SLP_TYP and SLP_EN bits.
         *
         * Note: We only use the first value returned by the \_Sx method
         * (acpi_sinfo.sleep_type_a) - As per ACPI specification.
         */
        u8 sleep_type_value =
            ((acpi_sinfo.sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
             ACPI_X_SLEEP_TYPE_MASK) | ACPI_X_SLEEP_ENABLE;

        status = acpi_hw_register_write(ACPI_REGISTER_SLEEP_CONTROL,
                                        sleep_type_value);
    }
    else
    {
        status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
                                        acpi_sinfo.pm1a_cnt_val);
        if ( !ACPI_FAILURE(status) && acpi_sinfo.pm1b_cnt_blk.address )
            status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
                                            acpi_sinfo.pm1b_cnt_val);
    }

    if ( ACPI_FAILURE(status) )
        return_ACPI_STATUS(AE_ERROR);

    /* Wait until we enter sleep state, and spin until we wake */
    while ( !acpi_get_wake_status() )
        continue;

    return_ACPI_STATUS(AE_OK);
}
Exemple #3
0
/*******************************************************************************
 *
 * FUNCTION:    acpi_enter_sleep_state
 *
 * PARAMETERS:  sleep_state         - Which sleep state to enter
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
 *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 *
 ******************************************************************************/
acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
{
	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;
	struct acpi_object_list arg_list;
	union acpi_object arg;
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);

	if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
	    (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
		ACPI_ERROR((AE_INFO, "Sleep values out of range: A=0x%X B=0x%X",
			    acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
	}

	sleep_type_reg_info =
	    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_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Clear all fixed and general purpose status bits */

	status = acpi_hw_clear_acpi_status();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
	 * 1) Disable/Clear all GPEs
	 * 2) Enable all wakeup GPEs
	 */
	status = acpi_hw_disable_all_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}
	acpi_gbl_system_awake_and_running = FALSE;

	status = acpi_hw_enable_all_wakeup_gpes();
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	if (gts) {
		/* Execute the _GTS method */

		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);
		}
	}

	/* Get current value of PM1A control */

	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%u]\n", sleep_state));

	/* Clear the SLP_EN and SLP_TYP fields */

	pm1a_control &= ~(sleep_type_reg_info->access_bit_mask |
			  sleep_enable_reg_info->access_bit_mask);
	pm1b_control = pm1a_control;

	/* Insert the SLP_TYP bits */

	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);


	/* Write #1: write the SLP_TYP data to the PM1 Control registers */

	status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Insert the sleep enable (SLP_EN) bit */

	pm1a_control |= sleep_enable_reg_info->access_bit_mask;
	pm1b_control |= sleep_enable_reg_info->access_bit_mask;

	/* Flush caches, as per ACPI specification */

	ACPI_FLUSH_CPU_CACHE();

	tboot_sleep(sleep_state, pm1a_control, pm1b_control);

	/* Write #2: Write both SLP_TYP + SLP_EN */

	status = acpi_hw_write_pm1_control(pm1a_control, pm1b_control);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	if (sleep_state > ACPI_STATE_S3) {
		/*
		 * We wanted to sleep > S3, but it didn't happen (by virtue of the
		 * fact that we are still executing!)
		 *
		 * 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
		 * away entirely.
		 */
		acpi_os_stall(10000000);

		status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
						sleep_enable_reg_info->
						access_bit_mask);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}
	}

	/* Wait until we enter sleep state */

	do {
		status = acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS,
						    &in_value);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}

		/* Spin until we wake */

	} while (!in_value);

	return_ACPI_STATUS(AE_OK);
}