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_GTS and _BFS were added to the suspend/resume flow in the ACPI 2.0 specification. Linux dutifully implemented _GTS and _BFS. We discovered that it was rarely seen in systems in the field. Further, some of those systems had AML so bogus that it could never work -- proof that no other operating system supports _GTS and _BFS. So we made _GTS and _BFS optional via modparam, and disabled them by default. But we've had to complicate some code to keep this support in the kernel, as these methods are defined to be evaluated very close to sleep entry and exit. Indeed, no other AML is ever evaluated with interrupts off. We have submitted a proposal for _GTS and _BFS to be officially removed from the ACPI specification on the next revision. Here we remove it from Linux. Signed-off-by: Len Brown <len.brown@intel.com> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
152 lines
5.0 KiB
C
152 lines
5.0 KiB
C
/******************************************************************************
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*
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* Name: achware.h -- hardware specific interfaces
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#ifndef __ACHWARE_H__
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#define __ACHWARE_H__
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/* Values for the _SST predefined method */
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#define ACPI_SST_INDICATOR_OFF 0
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#define ACPI_SST_WORKING 1
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#define ACPI_SST_WAKING 2
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#define ACPI_SST_SLEEPING 3
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#define ACPI_SST_SLEEP_CONTEXT 4
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/*
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* hwacpi - high level functions
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*/
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acpi_status acpi_hw_set_mode(u32 mode);
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u32 acpi_hw_get_mode(void);
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/*
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* hwregs - ACPI Register I/O
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*/
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acpi_status
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acpi_hw_validate_register(struct acpi_generic_address *reg,
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u8 max_bit_width, u64 *address);
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acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg);
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acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg);
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struct acpi_bit_register_info *acpi_hw_get_bit_register_info(u32 register_id);
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acpi_status acpi_hw_write_pm1_control(u32 pm1a_control, u32 pm1b_control);
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acpi_status acpi_hw_register_read(u32 register_id, u32 *return_value);
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acpi_status acpi_hw_register_write(u32 register_id, u32 value);
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acpi_status acpi_hw_clear_acpi_status(void);
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/*
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* hwsleep - sleep/wake support (Legacy sleep registers)
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*/
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acpi_status acpi_hw_legacy_sleep(u8 sleep_state);
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acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state);
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acpi_status acpi_hw_legacy_wake(u8 sleep_state);
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/*
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* hwesleep - sleep/wake support (Extended FADT-V5 sleep registers)
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*/
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void acpi_hw_execute_sleep_method(char *method_name, u32 integer_argument);
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acpi_status acpi_hw_extended_sleep(u8 sleep_state);
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acpi_status acpi_hw_extended_wake_prep(u8 sleep_state);
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acpi_status acpi_hw_extended_wake(u8 sleep_state);
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/*
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* hwvalid - Port I/O with validation
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*/
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acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width);
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acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width);
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/*
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* hwgpe - GPE support
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*/
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u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info,
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struct acpi_gpe_register_info *gpe_register_info);
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acpi_status
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acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action);
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acpi_status
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acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block, void *context);
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acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info);
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acpi_status
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acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block, void *context);
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acpi_status
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acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
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acpi_event_status * event_status);
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acpi_status acpi_hw_disable_all_gpes(void);
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acpi_status acpi_hw_enable_all_runtime_gpes(void);
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acpi_status acpi_hw_enable_all_wakeup_gpes(void);
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acpi_status
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acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block,
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void *context);
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/*
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* hwpci - PCI configuration support
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*/
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acpi_status
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acpi_hw_derive_pci_id(struct acpi_pci_id *pci_id,
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acpi_handle root_pci_device, acpi_handle pci_region);
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#endif /* __ACHWARE_H__ */
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