diff options
Diffstat (limited to 'StdLib/Include/Ipf/machine/acpi_func.h')
| -rw-r--r-- | StdLib/Include/Ipf/machine/acpi_func.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/StdLib/Include/Ipf/machine/acpi_func.h b/StdLib/Include/Ipf/machine/acpi_func.h new file mode 100644 index 0000000000..000fbbd9ac --- /dev/null +++ b/StdLib/Include/Ipf/machine/acpi_func.h @@ -0,0 +1,107 @@ +/* $NetBSD: acpi_func.h,v 1.2 2006/05/14 21:55:38 elad Exp $ */
+
+/*-
+ * 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: src/sys/ia64/include/acpica_machdep.h,v 1.4 2004/10/11 05:39:15 njl Exp $
+ */
+
+/******************************************************************************
+ *
+ * Name: acpica_machdep.h - arch-specific defines, etc.
+ * $Revision: 1.2 $
+ *
+ *****************************************************************************/
+
+#ifndef _IA64_ACPI_FUNC_H_
+#define _IA64_ACPI_FUNC_H_
+
+#include <machine/cpufunc.h>
+#include <machine/atomic.h>
+
+/* 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() /* XXX ia64_fc()? */
+
+
+/* Section 5.2.9.1: global lock acquire/release functions */
+extern int acpi_acquire_global_lock(uint32_t *lock);
+extern int acpi_release_global_lock(uint32_t *lock);
+#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
+ ((Acq) = acpi_acquire_global_lock(GLptr))
+#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
+ ((Acq) = acpi_release_global_lock(GLptr))
+
+
+/* Section 5.2.9.1: global lock acquire/release functions */
+#define GL_ACQUIRED (-1)
+#define GL_BUSY 0
+#define GL_BIT_PENDING 0x1
+#define GL_BIT_OWNED 0x2
+#define GL_BIT_MASK (GL_BIT_PENDING | GL_BIT_OWNED)
+
+/*
+ * Acquire the global lock. If busy, set the pending bit. The caller
+ * will wait for notification from the BIOS that the lock is available
+ * and then attempt to acquire it again.
+ */
+int
+acpi_acquire_global_lock(uint32_t *lock)
+{
+ uint32_t new, old;
+
+ do {
+ old = *lock;
+ new = ((old & ~GL_BIT_MASK) | GL_BIT_OWNED) |
+ ((old >> 1) & GL_BIT_PENDING);
+ } while (atomic_cmpset_acq_int(lock, old, new) == 0);
+
+ return ((new < GL_BIT_MASK) ? GL_ACQUIRED : GL_BUSY);
+}
+
+/*
+ * Release the global lock, returning whether there is a waiter pending.
+ * If the BIOS set the pending bit, OSPM must notify the BIOS when it
+ * releases the lock.
+ */
+int
+acpi_release_global_lock(uint32_t *lock)
+{
+ uint32_t new, old;
+
+ do {
+ old = *lock;
+ new = old & ~GL_BIT_MASK;
+ } while (atomic_cmpset_rel_int(lock, old, new) == 0);
+
+ return (old & GL_BIT_PENDING);
+}
+
+#endif /* _IA64_ACPI_FUNC_H_ */
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