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ACPICA: Add support for LPIT table.

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Adds header, disassembler, table compiler, and template support
for the Low Power Idle Table (LPIT).

Note that the disassembler and table compiler are not shipped in
the kernel.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2014-04-30 10:04:06 +08:00 committed by Rafael J. Wysocki
parent 51e35823eb
commit d36d4e30bd
1 changed files with 65 additions and 0 deletions
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65
include/acpi/actbl2.h
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@ -70,6 +70,7 @@
#define ACPI_SIG_HPET "HPET" /* High Precision Event Timer table */
#define ACPI_SIG_IBFT "IBFT" /* iSCSI Boot Firmware Table */
#define ACPI_SIG_IVRS "IVRS" /* I/O Virtualization Reporting Structure */
#define ACPI_SIG_LPIT "LPIT" /* Low Power Idle Table */
#define ACPI_SIG_MCFG "MCFG" /* PCI Memory Mapped Configuration table */
#define ACPI_SIG_MCHI "MCHI" /* Management Controller Host Interface table */
#define ACPI_SIG_MTMR "MTMR" /* MID Timer table */
@ -818,6 +819,70 @@ struct acpi_ivrs_memory {
u64 memory_length;
};
/*******************************************************************************
*
* LPIT - Low Power Idle Table
*
* Conforms to "ACPI Low Power Idle Table (LPIT) and _LPD Proposal (DRAFT)"
*
******************************************************************************/
struct acpi_table_lpit {
struct acpi_table_header header; /* Common ACPI table header */
};
/* LPIT subtable header */
struct acpi_lpit_header {
u32 type; /* Subtable type */
u32 length; /* Subtable length */
u16 unique_id;
u16 reserved;
u32 flags;
};
/* Values for subtable Type above */
enum acpi_lpit_type {
ACPI_LPIT_TYPE_NATIVE_CSTATE = 0x00,
ACPI_LPIT_TYPE_SIMPLE_IO = 0x01
};
/* Masks for Flags field above */
#define ACPI_LPIT_STATE_DISABLED (1)
#define ACPI_LPIT_NO_COUNTER (1<<1)
/*
* LPIT subtables, correspond to Type in struct acpi_lpit_header
*/
/* 0x00: Native C-state instruction based LPI structure */
struct acpi_lpit_native {
struct acpi_lpit_header header;
struct acpi_generic_address entry_trigger;
u32 residency;
u32 latency;
struct acpi_generic_address residency_counter;
u64 counter_frequency;
};
/* 0x01: Simple I/O based LPI structure */
struct acpi_lpit_io {
struct acpi_lpit_header header;
struct acpi_generic_address entry_trigger;
u32 trigger_action;
u64 trigger_value;
u64 trigger_mask;
struct acpi_generic_address minimum_idle_state;
u32 residency;
u32 latency;
struct acpi_generic_address residency_counter;
u64 counter_frequency;
};
/*******************************************************************************
*
* MCFG - PCI Memory Mapped Configuration table and sub-table