osl_ml.s revision ae115bc77f6fcde83175c75b4206dc2e50747966
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc.
* Use is subject to license terms.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/asm_linkage.h>
#include <sys/asm_misc.h>
#if defined(lint) || defined(__lint)
#include <sys/types.h>
#include "acpi.h"
#endif /* lint */
/*
* Implementation as specific by ACPI 3.0 specification
* section 5.2.10.1
*
* Global Lock Structure within the FACS
*
* |-----------------------------------------------------------------------|
* | Field | Bit Length | Bit Offset | Description |
* |---------|------------|------------|-----------------------------------|
* | Pending | 1 | 0 | Non-zero indicates that a request |
* | | | | for ownership of the global lock |
* | | | | is pending. |
* |---------|------------|------------|-----------------------------------|
* | Owned | 1 | 1 | Non-zero indicates that the Global|
* | | | | lock is owned. |
* |---------|------------|------------|-----------------------------------|
* | Reserved| 30 | 2 | Reserved for future use |
* |---------|------------|------------|-----------------------------------|
*/
#if defined(lint) || defined(__lint)
/* ARGSUSED */
UINT32
__acpi_acquire_global_lock(UINT32 *glp)
{ return (0); }
#else /* lint */
#if defined(__amd64)
ENTRY(__acpi_acquire_global_lock)
movq %rdi, %rcx / %ecx - glp
__acpi_acquire_global_lock_000:
movl (%rdi), %eax / get current value of Global Lock
movl %eax, %edx
andl $0xFFFFFFFE, %edx / Clear pending bit
btsl $1, %edx / Check and set owner bit
adcl $0, %edx / If owned, set pending bit
lock
cmpxchgl %edx, (%rdi) / Attempt to set new value
jnz __acpi_acquire_global_lock_000 / If not set, try again
cmpb $3, %dl / Was it acquired or marked pending?
sbbq %rax, %rax / acquired = -1, pending = 0
ret
SET_SIZE(__acpi_acquire_global_lock)
#elif defined(__i386)
ENTRY(__acpi_acquire_global_lock)
movl 4(%esp), %ecx / %ecx - glp
__acpi_acquire_global_lock_000:
movl (%ecx), %eax
movl %eax, %edx
andl $0xFFFFFFFE, %edx
btsl $1, %edx
adcl $0, %edx
lock
cmpxchgl %edx, (%ecx)
jnz __acpi_acquire_global_lock_000
cmpb $3, %dl
sbbl %eax, %eax
ret
SET_SIZE(__acpi_acquire_global_lock)
#endif /* i386 */
#endif /* lint */
#if defined(lint) || defined(__lint)
/* ARGSUSED */
UINT32
__acpi_release_global_lock(UINT32 *glp)
{ return (0); }
#else /* lint */
#if defined(__amd64)
ENTRY(__acpi_release_global_lock)
movq %rdi, %rcx
__acpi_release_global_lock_000:
movl (%rdi), %eax
movl %eax, %edx
andl $0xFFFFFFFC, %edx
lock
cmpxchgl %edx, (%rdi)
jnz __acpi_release_global_lock_000
andq $1, %Rax
ret
SET_SIZE(__acpi_release_global_lock)
#elif defined(__i386)
ENTRY(__acpi_release_global_lock)
movl 4(%esp), %ecx
__acpi_release_global_lock_000:
movl (%ecx), %eax
movl %eax, %edx
andl $0xFFFFFFFC, %edx
lock
cmpxchgl %edx, (%ecx)
jnz __acpi_release_global_lock_000
andl $1, %eax
ret
SET_SIZE(__acpi_release_global_lock)
#endif /* i386 */
#endif /* lint */
/*
* execute WBINVD instruction
*/
#if defined(lint) || defined(__lint)
/* ARGSUSED */
void
__acpi_wbinvd(void)
{ }
#else /* lint */
ENTRY(__acpi_wbinvd)
wbinvd
ret
SET_SIZE(__acpi_wbinvd)
#endif /* lint */