freebsd-dev/sys/x86/include/acpica_machdep.h
Konstantin Belousov b57a73f8e7 If x86 CPU implementation of the MWAIT instruction reasonably
interacts with interrupts, query ACPI and use MWAIT for entrance into
Cx sleep states.  Support C1 "I/O then halt" mode.  See Intel'
document 302223-007 "Intelб╝ Processor Vendor-Specific ACPI Interface
Specification" for description.

Move the acpi_cpu_c1() function into x86/cpu_machdep.c and use
it instead of inlining "sti; hlt" sequence in several places.

In the acpi(4) man page, besides documenting the dev.cpu.N.cx_methods
sysctl, correct the names for dev.cpu.N.{cx_usage,cx_lowest,cx_supported}
sysctls.

Both jkim and avg have some other patches implementing the mwait
functionality; this work is unrelated.  Linux does not rely on the
ACPI to provide correct tables describing Cx modes.  Instead, the
driver has pre-defined knowledge of the CPU models, it was supplied by
Intel.

Tested by:    pho (previous versions)
Sponsored by:	The FreeBSD Foundation
2015-05-09 12:28:48 +00:00

89 lines
3.1 KiB
C

/*-
* Copyright (c) 2002 Mitsuru IWASAKI
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/******************************************************************************
*
* Name: acpica_machdep.h - arch-specific defines, etc.
* $Revision$
*
*****************************************************************************/
#ifndef __ACPICA_MACHDEP_H__
#define __ACPICA_MACHDEP_H__
#ifdef _KERNEL
/*
* Calling conventions:
*
* ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
* ACPI_EXTERNAL_XFACE - External ACPI interfaces
* ACPI_INTERNAL_XFACE - Internal ACPI interfaces
* ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
*/
#define ACPI_SYSTEM_XFACE
#define ACPI_EXTERNAL_XFACE
#define ACPI_INTERNAL_XFACE
#define ACPI_INTERNAL_VAR_XFACE
/* Asm macros */
#define ACPI_ASM_MACROS
#define BREAKPOINT3
#define ACPI_DISABLE_IRQS() disable_intr()
#define ACPI_ENABLE_IRQS() enable_intr()
#define ACPI_FLUSH_CPU_CACHE() wbinvd()
/* Section 5.2.10.1: global lock acquire/release functions */
int acpi_acquire_global_lock(volatile uint32_t *);
int acpi_release_global_lock(volatile uint32_t *);
#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) do { \
(Acq) = acpi_acquire_global_lock(&((GLptr)->GlobalLock)); \
} while (0)
#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) do { \
(Acq) = acpi_release_global_lock(&((GLptr)->GlobalLock)); \
} while (0)
enum intr_trigger;
enum intr_polarity;
void acpi_SetDefaultIntrModel(int model);
void acpi_cpu_c1(void);
void acpi_cpu_idle_mwait(uint32_t mwait_hint);
void *acpi_map_table(vm_paddr_t pa, const char *sig);
void acpi_unmap_table(void *table);
vm_paddr_t acpi_find_table(const char *sig);
void madt_parse_interrupt_values(void *entry,
enum intr_trigger *trig, enum intr_polarity *pol);
extern int madt_found_sci_override;
#endif /* _KERNEL */
#endif /* __ACPICA_MACHDEP_H__ */