ACPICA: OSL: Clean up acpi_os_printf()/acpi_os_vprintf() stubs

This patch is mainly for acpidump where there are redundant
acpi_os_printf()/acpi_os_vprintf() stubs implemented. This patch cleans up such
specific implementation by linking acpidump to osunixxf.c/oswinxf.c.

To make acpi_os_printf() exported by osunixxf.c/oswinxf.c to behave as the
old acpidump specific ones, applications need to:
 1. Initialize acpi_gbl_db_output_flags to ACPI_DB_CONSOLE_OUTPUT.
    This is automatically done by ACPI_INIT_GLOBAL(), applications need to
    link utglobal.o to utilize this mechanism.
 2. Initialize acpi_gbl_output_file to stdout.
    For GCC, assigning stdout to acpi_gbl_output_file using ACPI_INIT_GLOBAL()
    is not possible as stdout is not a constant in GCC environment. As an
    alternative solution, stdout assignment is put into acpi_os_initialize().
    Thus acpi_os_initialize() need to be invoked very early by the
    applications to initialize the default output of acpi_os_printf().

This patch also releases osunixxf.c to the Linux kernel. Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

4 files changed, 1306 insertions, 22 deletions

diff --git a/tools/power/acpi/Makefile b/tools/power/acpi/Makefile
index 61446dbf70a6..f88a251863c5 100644
--- a/tools/power/acpi/Makefile
+++ b/tools/power/acpi/Makefile
@@ -108,6 +108,7 @@ DUMP_OBJS = \
 	apmain.o\
 	osunixdir.o\
 	osunixmap.o\
+	osunixxf.o\
 	tbprint.o\
 	tbxfroot.o\
 	utbuffer.o\
diff --git a/tools/power/acpi/os_specific/service_layers/osunixxf.c b/tools/power/acpi/os_specific/service_layers/osunixxf.c
new file mode 100644
index 000000000000..0e6a8a6be441
--- /dev/null
+++ b/tools/power/acpi/os_specific/service_layers/osunixxf.c
@@ -0,0 +1,1304 @@
+/******************************************************************************
+ *
+ * Module Name: osunixxf - UNIX OSL interfaces
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2014, Intel Corp.
+ * 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,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ */
+
+/*
+ * These interfaces are required in order to compile the ASL compiler and the
+ * various ACPICA tools under Linux or other Unix-like system.
+ */
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "amlcode.h"
+#include "acparser.h"
+#include "acdebug.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <semaphore.h>
+#include <pthread.h>
+#include <errno.h>
+
+#define _COMPONENT          ACPI_OS_SERVICES
+ACPI_MODULE_NAME("osunixxf")
+
+u8 acpi_gbl_debug_timeout = FALSE;
+
+/* Upcalls to acpi_exec */
+
+void
+ae_table_override(struct acpi_table_header *existing_table,
+		  struct acpi_table_header **new_table);
+
+typedef void *(*PTHREAD_CALLBACK) (void *);
+
+/* Buffer used by acpi_os_vprintf */
+
+#define ACPI_VPRINTF_BUFFER_SIZE    512
+#define _ASCII_NEWLINE              '\n'
+
+/* Terminal support for acpi_exec only */
+
+#ifdef ACPI_EXEC_APP
+#include <termios.h>
+
+struct termios original_term_attributes;
+int term_attributes_were_set = 0;
+
+acpi_status acpi_ut_read_line(char *buffer, u32 buffer_length, u32 *bytes_read);
+
+static void os_enter_line_edit_mode(void);
+
+static void os_exit_line_edit_mode(void);
+
+/******************************************************************************
+ *
+ * FUNCTION:    os_enter_line_edit_mode, os_exit_line_edit_mode
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Enter/Exit the raw character input mode for the terminal.
+ *
+ * Interactive line-editing support for the AML debugger. Used with the
+ * common/acgetline module.
+ *
+ * readline() is not used because of non-portability. It is not available
+ * on all systems, and if it is, often the package must be manually installed.
+ *
+ * Therefore, we use the POSIX tcgetattr/tcsetattr and do the minimal line
+ * editing that we need in acpi_os_get_line.
+ *
+ * If the POSIX tcgetattr/tcsetattr interfaces are unavailable, these
+ * calls will also work:
+ *     For os_enter_line_edit_mode: system ("stty cbreak -echo")
+ *     For os_exit_line_edit_mode: system ("stty cooked echo")
+ *
+ *****************************************************************************/
+
+static void os_enter_line_edit_mode(void)
+{
+	struct termios local_term_attributes;
+
+	/* Get and keep the original attributes */
+
+	if (tcgetattr(STDIN_FILENO, &original_term_attributes)) {
+		fprintf(stderr, "Could not get terminal attributes!\n");
+		return;
+	}
+
+	/* Set the new attributes to enable raw character input */
+
+	memcpy(&local_term_attributes, &original_term_attributes,
+	       sizeof(struct termios));
+
+	local_term_attributes.c_lflag &= ~(ICANON | ECHO);
+	local_term_attributes.c_cc[VMIN] = 1;
+	local_term_attributes.c_cc[VTIME] = 0;
+
+	if (tcsetattr(STDIN_FILENO, TCSANOW, &local_term_attributes)) {
+		fprintf(stderr, "Could not set terminal attributes!\n");
+		return;
+	}
+
+	term_attributes_were_set = 1;
+}
+
+static void os_exit_line_edit_mode(void)
+{
+
+	if (!term_attributes_were_set) {
+		return;
+	}
+
+	/* Set terminal attributes back to the original values */
+
+	if (tcsetattr(STDIN_FILENO, TCSANOW, &original_term_attributes)) {
+		fprintf(stderr, "Could not restore terminal attributes!\n");
+	}
+}
+
+#else
+
+/* These functions are not needed for other ACPICA utilities */
+
+#define os_enter_line_edit_mode()
+#define os_exit_line_edit_mode()
+#endif
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_initialize, acpi_os_terminate
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize and terminate this module.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_initialize(void)
+{
+
+	acpi_gbl_output_file = stdout;
+
+	os_enter_line_edit_mode();
+	return (AE_OK);
+}
+
+acpi_status acpi_os_terminate(void)
+{
+
+	os_exit_line_edit_mode();
+	return (AE_OK);
+}
+
+#ifndef ACPI_USE_NATIVE_RSDP_POINTER
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_root_pointer
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      RSDP physical address
+ *
+ * DESCRIPTION: Gets the ACPI root pointer (RSDP)
+ *
+ *****************************************************************************/
+
+acpi_physical_address acpi_os_get_root_pointer(void)
+{
+
+	return (0);
+}
+#endif
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_predefined_override
+ *
+ * PARAMETERS:  init_val            - Initial value of the predefined object
+ *              new_val             - The new value for the object
+ *
+ * RETURN:      Status, pointer to value. Null pointer returned if not
+ *              overriding.
+ *
+ * DESCRIPTION: Allow the OS to override predefined names
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_predefined_override(const struct acpi_predefined_names * init_val,
+			    acpi_string * new_val)
+{
+
+	if (!init_val || !new_val) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	*new_val = NULL;
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_table_override
+ *
+ * PARAMETERS:  existing_table      - Header of current table (probably
+ *                                    firmware)
+ *              new_table           - Where an entire new table is returned.
+ *
+ * RETURN:      Status, pointer to new table. Null pointer returned if no
+ *              table is available to override
+ *
+ * DESCRIPTION: Return a different version of a table if one is available
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_table_override(struct acpi_table_header * existing_table,
+		       struct acpi_table_header ** new_table)
+{
+
+	if (!existing_table || !new_table) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	*new_table = NULL;
+
+#ifdef ACPI_EXEC_APP
+
+	ae_table_override(existing_table, new_table);
+	return (AE_OK);
+#else
+
+	return (AE_NO_ACPI_TABLES);
+#endif
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_physical_table_override
+ *
+ * PARAMETERS:  existing_table      - Header of current table (probably firmware)
+ *              new_address         - Where new table address is returned
+ *                                    (Physical address)
+ *              new_table_length    - Where new table length is returned
+ *
+ * RETURN:      Status, address/length of new table. Null pointer returned
+ *              if no table is available to override.
+ *
+ * DESCRIPTION: Returns AE_SUPPORT, function not used in user space.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_physical_table_override(struct acpi_table_header * existing_table,
+				acpi_physical_address * new_address,
+				u32 *new_table_length)
+{
+
+	return (AE_SUPPORT);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_redirect_output
+ *
+ * PARAMETERS:  destination         - An open file handle/pointer
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Causes redirect of acpi_os_printf and acpi_os_vprintf
+ *
+ *****************************************************************************/
+
+void acpi_os_redirect_output(void *destination)
+{
+
+	acpi_gbl_output_file = destination;
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_printf
+ *
+ * PARAMETERS:  fmt, ...            - Standard printf format
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Formatted output. Note: very similar to acpi_os_vprintf
+ *              (performance), changes should be tracked in both functions.
+ *
+ *****************************************************************************/
+
+void ACPI_INTERNAL_VAR_XFACE acpi_os_printf(const char *fmt, ...)
+{
+	va_list args;
+	u8 flags;
+
+	flags = acpi_gbl_db_output_flags;
+	if (flags & ACPI_DB_REDIRECTABLE_OUTPUT) {
+
+		/* Output is directable to either a file (if open) or the console */
+
+		if (acpi_gbl_debug_file) {
+
+			/* Output file is open, send the output there */
+
+			va_start(args, fmt);
+			vfprintf(acpi_gbl_debug_file, fmt, args);
+			va_end(args);
+		} else {
+			/* No redirection, send output to console (once only!) */
+
+			flags |= ACPI_DB_CONSOLE_OUTPUT;
+		}
+	}
+
+	if (flags & ACPI_DB_CONSOLE_OUTPUT) {
+		va_start(args, fmt);
+		vfprintf(acpi_gbl_output_file, fmt, args);
+		va_end(args);
+	}
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_vprintf
+ *
+ * PARAMETERS:  fmt                 - Standard printf format
+ *              args                - Argument list
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Formatted output with argument list pointer. Note: very
+ *              similar to acpi_os_printf, changes should be tracked in both
+ *              functions.
+ *
+ *****************************************************************************/
+
+void acpi_os_vprintf(const char *fmt, va_list args)
+{
+	u8 flags;
+	char buffer[ACPI_VPRINTF_BUFFER_SIZE];
+
+	/*
+	 * We build the output string in a local buffer because we may be
+	 * outputting the buffer twice. Using vfprintf is problematic because
+	 * some implementations modify the args pointer/structure during
+	 * execution. Thus, we use the local buffer for portability.
+	 *
+	 * Note: Since this module is intended for use by the various ACPICA
+	 * utilities/applications, we can safely declare the buffer on the stack.
+	 * Also, This function is used for relatively small error messages only.
+	 */
+	vsnprintf(buffer, ACPI_VPRINTF_BUFFER_SIZE, fmt, args);
+
+	flags = acpi_gbl_db_output_flags;
+	if (flags & ACPI_DB_REDIRECTABLE_OUTPUT) {
+
+		/* Output is directable to either a file (if open) or the console */
+
+		if (acpi_gbl_debug_file) {
+
+			/* Output file is open, send the output there */
+
+			fputs(buffer, acpi_gbl_debug_file);
+		} else {
+			/* No redirection, send output to console (once only!) */
+
+			flags |= ACPI_DB_CONSOLE_OUTPUT;
+		}
+	}
+
+	if (flags & ACPI_DB_CONSOLE_OUTPUT) {
+		fputs(buffer, acpi_gbl_output_file);
+	}
+}
+
+#ifndef ACPI_EXEC_APP
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_line
+ *
+ * PARAMETERS:  buffer              - Where to return the command line
+ *              buffer_length       - Maximum length of Buffer
+ *              bytes_read          - Where the actual byte count is returned
+ *
+ * RETURN:      Status and actual bytes read
+ *
+ * DESCRIPTION: Get the next input line from the terminal. NOTE: For the
+ *              acpi_exec utility, we use the acgetline module instead to
+ *              provide line-editing and history support.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
+{
+	int input_char;
+	u32 end_of_line;
+
+	/* Standard acpi_os_get_line for all utilities except acpi_exec */
+
+	for (end_of_line = 0;; end_of_line++) {
+		if (end_of_line >= buffer_length) {
+			return (AE_BUFFER_OVERFLOW);
+		}
+
+		if ((input_char = getchar()) == EOF) {
+			return (AE_ERROR);
+		}
+
+		if (!input_char || input_char == _ASCII_NEWLINE) {
+			break;
+		}
+
+		buffer[end_of_line] = (char)input_char;
+	}
+
+	/* Null terminate the buffer */
+
+	buffer[end_of_line] = 0;
+
+	/* Return the number of bytes in the string */
+
+	if (bytes_read) {
+		*bytes_read = end_of_line;
+	}
+
+	return (AE_OK);
+}
+#endif
+
+#ifndef ACPI_USE_NATIVE_MEMORY_MAPPING
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_map_memory
+ *
+ * PARAMETERS:  where               - Physical address of memory to be mapped
+ *              length              - How much memory to map
+ *
+ * RETURN:      Pointer to mapped memory. Null on error.
+ *
+ * DESCRIPTION: Map physical memory into caller's address space
+ *
+ *****************************************************************************/
+
+void *acpi_os_map_memory(acpi_physical_address where, acpi_size length)
+{
+
+	return (ACPI_TO_POINTER((acpi_size) where));
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_unmap_memory
+ *
+ * PARAMETERS:  where               - Logical address of memory to be unmapped
+ *              length              - How much memory to unmap
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Delete a previously created mapping. Where and Length must
+ *              correspond to a previous mapping exactly.
+ *
+ *****************************************************************************/
+
+void acpi_os_unmap_memory(void *where, acpi_size length)
+{
+
+	return;
+}
+#endif
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_allocate
+ *
+ * PARAMETERS:  size                - Amount to allocate, in bytes
+ *
+ * RETURN:      Pointer to the new allocation. Null on error.
+ *
+ * DESCRIPTION: Allocate memory. Algorithm is dependent on the OS.
+ *
+ *****************************************************************************/
+
+void *acpi_os_allocate(acpi_size size)
+{
+	void *mem;
+
+	mem = (void *)malloc((size_t) size);
+	return (mem);
+}
+
+#ifdef USE_NATIVE_ALLOCATE_ZEROED
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_allocate_zeroed
+ *
+ * PARAMETERS:  size                - Amount to allocate, in bytes
+ *
+ * RETURN:      Pointer to the new allocation. Null on error.
+ *
+ * DESCRIPTION: Allocate and zero memory. Algorithm is dependent on the OS.
+ *
+ *****************************************************************************/
+
+void *acpi_os_allocate_zeroed(acpi_size size)
+{
+	void *mem;
+
+	mem = (void *)calloc(1, (size_t) size);
+	return (mem);
+}
+#endif
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_free
+ *
+ * PARAMETERS:  mem                 - Pointer to previously allocated memory
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Free memory allocated via acpi_os_allocate
+ *
+ *****************************************************************************/
+
+void acpi_os_free(void *mem)
+{
+
+	free(mem);
+}
+
+#ifdef ACPI_SINGLE_THREADED
+/******************************************************************************
+ *
+ * FUNCTION:    Semaphore stub functions
+ *
+ * DESCRIPTION: Stub functions used for single-thread applications that do
+ *              not require semaphore synchronization. Full implementations
+ *              of these functions appear after the stubs.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_create_semaphore(u32 max_units,
+			 u32 initial_units, acpi_handle * out_handle)
+{
+	*out_handle = (acpi_handle) 1;
+	return (AE_OK);
+}
+
+acpi_status acpi_os_delete_semaphore(acpi_handle handle)
+{
+	return (AE_OK);
+}
+
+acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
+{
+	return (AE_OK);
+}
+
+acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
+{
+	return (AE_OK);
+}
+
+#else
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_create_semaphore
+ *
+ * PARAMETERS:  initial_units       - Units to be assigned to the new semaphore
+ *              out_handle          - Where a handle will be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create an OS semaphore
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_create_semaphore(u32 max_units,
+			 u32 initial_units, acpi_handle * out_handle)
+{
+	sem_t *sem;
+
+	if (!out_handle) {
+		return (AE_BAD_PARAMETER);
+	}
+#ifdef __APPLE__
+	{
+		char *semaphore_name = tmpnam(NULL);
+
+		sem =
+		    sem_open(semaphore_name, O_EXCL | O_CREAT, 0755,
+			     initial_units);
+		if (!sem) {
+			return (AE_NO_MEMORY);
+		}
+		sem_unlink(semaphore_name);	/* This just deletes the name */
+	}
+
+#else
+	sem = acpi_os_allocate(sizeof(sem_t));
+	if (!sem) {
+		return (AE_NO_MEMORY);
+	}
+
+	if (sem_init(sem, 0, initial_units) == -1) {
+		acpi_os_free(sem);
+		return (AE_BAD_PARAMETER);
+	}
+#endif
+
+	*out_handle = (acpi_handle) sem;
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_delete_semaphore
+ *
+ * PARAMETERS:  handle              - Handle returned by acpi_os_create_semaphore
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Delete an OS semaphore
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_delete_semaphore(acpi_handle handle)
+{
+	sem_t *sem = (sem_t *) handle;
+
+	if (!sem) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	if (sem_destroy(sem) == -1) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_wait_semaphore
+ *
+ * PARAMETERS:  handle              - Handle returned by acpi_os_create_semaphore
+ *              units               - How many units to wait for
+ *              msec_timeout        - How long to wait (milliseconds)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Wait for units
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 msec_timeout)
+{
+	acpi_status status = AE_OK;
+	sem_t *sem = (sem_t *) handle;
+#ifndef ACPI_USE_ALTERNATE_TIMEOUT
+	struct timespec time;
+	int ret_val;
+#endif
+
+	if (!sem) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	switch (msec_timeout) {
+		/*
+		 * No Wait:
+		 * --------
+		 * A zero timeout value indicates that we shouldn't wait - just
+		 * acquire the semaphore if available otherwise return AE_TIME
+		 * (a.k.a. 'would block').
+		 */
+	case 0:
+
+		if (sem_trywait(sem) == -1) {
+			status = (AE_TIME);
+		}
+		break;
+
+		/* Wait Indefinitely */
+
+	case ACPI_WAIT_FOREVER:
+
+		if (sem_wait(sem)) {
+			status = (AE_TIME);
+		}
+		break;
+
+		/* Wait with msec_timeout */
+
+	default:
+
+#ifdef ACPI_USE_ALTERNATE_TIMEOUT
+		/*
+		 * Alternate timeout mechanism for environments where
+		 * sem_timedwait is not available or does not work properly.
+		 */
+		while (msec_timeout) {
+			if (sem_trywait(sem) == 0) {
+
+				/* Got the semaphore */
+				return (AE_OK);
+			}
+
+			if (msec_timeout >= 10) {
+				msec_timeout -= 10;
+				usleep(10 * ACPI_USEC_PER_MSEC);	/* ten milliseconds */
+			} else {
+				msec_timeout--;
+				usleep(ACPI_USEC_PER_MSEC);	/* one millisecond */
+			}
+		}
+		status = (AE_TIME);
+#else
+		/*
+		 * The interface to sem_timedwait is an absolute time, so we need to
+		 * get the current time, then add in the millisecond Timeout value.
+		 */
+		if (clock_gettime(CLOCK_REALTIME, &time) == -1) {
+			perror("clock_gettime");
+			return (AE_TIME);
+		}
+
+		time.tv_sec += (msec_timeout / ACPI_MSEC_PER_SEC);
+		time.tv_nsec +=
+		    ((msec_timeout % ACPI_MSEC_PER_SEC) * ACPI_NSEC_PER_MSEC);
+
+		/* Handle nanosecond overflow (field must be less than one second) */
+
+		if (time.tv_nsec >= ACPI_NSEC_PER_SEC) {
+			time.tv_sec += (time.tv_nsec / ACPI_NSEC_PER_SEC);
+			time.tv_nsec = (time.tv_nsec % ACPI_NSEC_PER_SEC);
+		}
+
+		while (((ret_val = sem_timedwait(sem, &time)) == -1)
+		       && (errno == EINTR)) {
+			continue;
+		}
+
+		if (ret_val != 0) {
+			if (errno != ETIMEDOUT) {
+				perror("sem_timedwait");
+			}
+			status = (AE_TIME);
+		}
+#endif
+		break;
+	}
+
+	return (status);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_signal_semaphore
+ *
+ * PARAMETERS:  handle              - Handle returned by acpi_os_create_semaphore
+ *              units               - Number of units to send
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Send units
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
+{
+	sem_t *sem = (sem_t *) handle;
+
+	if (!sem) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	if (sem_post(sem) == -1) {
+		return (AE_LIMIT);
+	}
+
+	return (AE_OK);
+}
+
+#endif				/* ACPI_SINGLE_THREADED */
+
+/******************************************************************************
+ *
+ * FUNCTION:    Spinlock interfaces
+ *
+ * DESCRIPTION: Map these interfaces to semaphore interfaces
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_create_lock(acpi_spinlock * out_handle)
+{
+
+	return (acpi_os_create_semaphore(1, 1, out_handle));
+}
+
+void acpi_os_delete_lock(acpi_spinlock handle)
+{
+	acpi_os_delete_semaphore(handle);
+}
+
+acpi_cpu_flags acpi_os_acquire_lock(acpi_handle handle)
+{
+	acpi_os_wait_semaphore(handle, 1, 0xFFFF);
+	return (0);
+}
+
+void acpi_os_release_lock(acpi_spinlock handle, acpi_cpu_flags flags)
+{
+	acpi_os_signal_semaphore(handle, 1);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_install_interrupt_handler
+ *
+ * PARAMETERS:  interrupt_number    - Level handler should respond to.
+ *              isr                 - Address of the ACPI interrupt handler
+ *              except_ptr          - Where status is returned
+ *
+ * RETURN:      Handle to the newly installed handler.
+ *
+ * DESCRIPTION: Install an interrupt handler. Used to install the ACPI
+ *              OS-independent handler.
+ *
+ *****************************************************************************/
+
+u32
+acpi_os_install_interrupt_handler(u32 interrupt_number,
+				  acpi_osd_handler service_routine,
+				  void *context)
+{
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_remove_interrupt_handler
+ *
+ * PARAMETERS:  handle              - Returned when handler was installed
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Uninstalls an interrupt handler.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_remove_interrupt_handler(u32 interrupt_number,
+				 acpi_osd_handler service_routine)
+{
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_stall
+ *
+ * PARAMETERS:  microseconds        - Time to sleep
+ *
+ * RETURN:      Blocks until sleep is completed.
+ *
+ * DESCRIPTION: Sleep at microsecond granularity
+ *
+ *****************************************************************************/
+
+void acpi_os_stall(u32 microseconds)
+{
+
+	if (microseconds) {
+		usleep(microseconds);
+	}
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_sleep
+ *
+ * PARAMETERS:  milliseconds        - Time to sleep
+ *
+ * RETURN:      Blocks until sleep is completed.
+ *
+ * DESCRIPTION: Sleep at millisecond granularity
+ *
+ *****************************************************************************/
+
+void acpi_os_sleep(u64 milliseconds)
+{
+
+	/* Sleep for whole seconds */
+
+	sleep(milliseconds / ACPI_MSEC_PER_SEC);
+
+	/*
+	 * Sleep for remaining microseconds.
+	 * Arg to usleep() is in usecs and must be less than 1,000,000 (1 second).
+	 */
+	usleep((milliseconds % ACPI_MSEC_PER_SEC) * ACPI_USEC_PER_MSEC);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_timer
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Current time in 100 nanosecond units
+ *
+ * DESCRIPTION: Get the current system time
+ *
+ *****************************************************************************/
+
+u64 acpi_os_get_timer(void)
+{
+	struct timeval time;
+
+	/* This timer has sufficient resolution for user-space application code */
+
+	gettimeofday(&time, NULL);
+
+	/* (Seconds * 10^7 = 100ns(10^-7)) + (Microseconds(10^-6) * 10^1 = 100ns) */
+
+	return (((u64)time.tv_sec * ACPI_100NSEC_PER_SEC) +
+		((u64)time.tv_usec * ACPI_100NSEC_PER_USEC));
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_read_pci_configuration
+ *
+ * PARAMETERS:  pci_id              - Seg/Bus/Dev
+ *              pci_register        - Device Register
+ *              value               - Buffer where value is placed
+ *              width               - Number of bits
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Read data from PCI configuration space
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_read_pci_configuration(struct acpi_pci_id *pci_id,
+			       u32 pci_register, u64 *value, u32 width)
+{
+
+	*value = 0;
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_write_pci_configuration
+ *
+ * PARAMETERS:  pci_id              - Seg/Bus/Dev
+ *              pci_register        - Device Register
+ *              value               - Value to be written
+ *              width               - Number of bits
+ *
+ * RETURN:      Status.
+ *
+ * DESCRIPTION: Write data to PCI configuration space
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id,
+				u32 pci_register, u64 value, u32 width)
+{
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_read_port
+ *
+ * PARAMETERS:  address             - Address of I/O port/register to read
+ *              value               - Where value is placed
+ *              width               - Number of bits
+ *
+ * RETURN:      Value read from port
+ *
+ * DESCRIPTION: Read data from an I/O port or register
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_read_port(acpi_io_address address, u32 *value, u32 width)
+{
+
+	switch (width) {
+	case 8:
+
+		*value = 0xFF;
+		break;
+
+	case 16:
+
+		*value = 0xFFFF;
+		break;
+
+	case 32:
+
+		*value = 0xFFFFFFFF;
+		break;
+
+	default:
+
+		return (AE_BAD_PARAMETER);
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_write_port
+ *
+ * PARAMETERS:  address             - Address of I/O port/register to write
+ *              value               - Value to write
+ *              width               - Number of bits
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Write data to an I/O port or register
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_write_port(acpi_io_address address, u32 value, u32 width)
+{
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_read_memory
+ *
+ * PARAMETERS:  address             - Physical Memory Address to read
+ *              value               - Where value is placed
+ *              width               - Number of bits (8,16,32, or 64)
+ *
+ * RETURN:      Value read from physical memory address. Always returned
+ *              as a 64-bit integer, regardless of the read width.
+ *
+ * DESCRIPTION: Read data from a physical memory address
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_read_memory(acpi_physical_address address, u64 *value, u32 width)
+{
+
+	switch (width) {
+	case 8:
+	case 16:
+	case 32:
+	case 64:
+
+		*value = 0;
+		break;
+
+	default:
+
+		return (AE_BAD_PARAMETER);
+	}
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_write_memory
+ *
+ * PARAMETERS:  address             - Physical Memory Address to write
+ *              value               - Value to write
+ *              width               - Number of bits (8,16,32, or 64)
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Write data to a physical memory address
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_write_memory(acpi_physical_address address, u64 value, u32 width)
+{
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_readable
+ *
+ * PARAMETERS:  pointer             - Area to be verified
+ *              length              - Size of area
+ *
+ * RETURN:      TRUE if readable for entire length
+ *
+ * DESCRIPTION: Verify that a pointer is valid for reading
+ *
+ *****************************************************************************/
+
+u8 acpi_os_readable(void *pointer, acpi_size length)
+{
+
+	return (TRUE);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_writable
+ *
+ * PARAMETERS:  pointer             - Area to be verified
+ *              length              - Size of area
+ *
+ * RETURN:      TRUE if writable for entire length
+ *
+ * DESCRIPTION: Verify that a pointer is valid for writing
+ *
+ *****************************************************************************/
+
+u8 acpi_os_writable(void *pointer, acpi_size length)
+{
+
+	return (TRUE);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_signal
+ *
+ * PARAMETERS:  function            - ACPI A signal function code
+ *              info                - Pointer to function-dependent structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Miscellaneous functions. Example implementation only.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_os_signal(u32 function, void *info)
+{
+
+	switch (function) {
+	case ACPI_SIGNAL_FATAL:
+
+		break;
+
+	case ACPI_SIGNAL_BREAKPOINT:
+
+		break;
+
+	default:
+
+		break;
+	}
+
+	return (AE_OK);
+}
+
+/* Optional multi-thread support */
+
+#ifndef ACPI_SINGLE_THREADED
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_thread_id
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Id of the running thread
+ *
+ * DESCRIPTION: Get the ID of the current (running) thread
+ *
+ *****************************************************************************/
+
+acpi_thread_id acpi_os_get_thread_id(void)
+{
+	pthread_t thread;
+
+	thread = pthread_self();
+	return (ACPI_CAST_PTHREAD_T(thread));
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_execute
+ *
+ * PARAMETERS:  type                - Type of execution
+ *              function            - Address of the function to execute
+ *              context             - Passed as a parameter to the function
+ *
+ * RETURN:      Status.
+ *
+ * DESCRIPTION: Execute a new thread
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_execute(acpi_execute_type type,
+		acpi_osd_exec_callback function, void *context)
+{
+	pthread_t thread;
+	int ret;
+
+	ret =
+	    pthread_create(&thread, NULL, (PTHREAD_CALLBACK) function, context);
+	if (ret) {
+		acpi_os_printf("Create thread failed");
+	}
+	return (0);
+}
+
+#else				/* ACPI_SINGLE_THREADED */
+acpi_thread_id acpi_os_get_thread_id(void)
+{
+	return (1);
+}
+
+acpi_status
+acpi_os_execute(acpi_execute_type type,
+		acpi_osd_exec_callback function, void *context)
+{
+
+	function(context);
+
+	return (AE_OK);
+}
+
+#endif				/* ACPI_SINGLE_THREADED */
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_wait_events_complete
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Wait for all asynchronous events to complete. This
+ *              implementation does nothing.
+ *
+ *****************************************************************************/
+
+void acpi_os_wait_events_complete(void)
+{
+	return;
+}
diff --git a/tools/power/acpi/tools/acpidump/apdump.c b/tools/power/acpi/tools/acpidump/apdump.c
index 3cac12378366..e8729aa3a60e 100644
--- a/tools/power/acpi/tools/acpidump/apdump.c
+++ b/tools/power/acpi/tools/acpidump/apdump.c
@@ -427,25 +427,3 @@ exit:
 	free(table);
 	return (table_status);
 }
-
-/******************************************************************************
- *
- * FUNCTION:    acpi_os* print functions
- *
- * DESCRIPTION: Used for linkage with ACPICA modules
- *
- ******************************************************************************/
-
-void ACPI_INTERNAL_VAR_XFACE acpi_os_printf(const char *fmt, ...)
-{
-	va_list args;
-
-	va_start(args, fmt);
-	vfprintf(stdout, fmt, args);
-	va_end(args);
-}
-
-void acpi_os_vprintf(const char *fmt, va_list args)
-{
-	vfprintf(stdout, fmt, args);
-}
diff --git a/tools/power/acpi/tools/acpidump/apmain.c b/tools/power/acpi/tools/acpidump/apmain.c
index 51e8d638db18..c03e4731f099 100644
--- a/tools/power/acpi/tools/acpidump/apmain.c
+++ b/tools/power/acpi/tools/acpidump/apmain.c
@@ -288,6 +288,7 @@ int ACPI_SYSTEM_XFACE main(int argc, char *argv[])
 	u32 i;
 
 	ACPI_DEBUG_INITIALIZE();	/* For debug version only */
+	acpi_os_initialize();
 
 	/* Process command line options */