3 files changed, 254 insertions, 0 deletions

diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index f6f5f8af2112..03b3e6d405ff 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -399,4 +399,35 @@ char *acpi_os_get_next_filename(void *dir_handle);
 void acpi_os_close_directory(void *dir_handle);
 #endif
 
+/*
+ * File I/O and related support
+ */
+#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_open_file
+ACPI_FILE acpi_os_open_file(const char *path, u8 modes);
+#endif
+
+#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_close_file
+void acpi_os_close_file(ACPI_FILE file);
+#endif
+
+#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_read_file
+int
+acpi_os_read_file(ACPI_FILE file,
+                  void *buffer, acpi_size size, acpi_size count);
+#endif
+
+#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_write_file
+int
+acpi_os_write_file(ACPI_FILE file,
+                   void *buffer, acpi_size size, acpi_size count);
+#endif
+
+#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_get_file_offset
+long acpi_os_get_file_offset(ACPI_FILE file);
+#endif
+
+#ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_set_file_offset
+acpi_status acpi_os_set_file_offset(ACPI_FILE file, long offset, u8 from);
+#endif
+
 #endif                          /* __ACPIOSXF_H__ */
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 19b26bb69a70..5480209b4254 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -1244,4 +1244,13 @@ struct acpi_memory_list {
 #define ACPI_OSI_WIN_7                  0x0B
 #define ACPI_OSI_WIN_8                  0x0C
 
+/* Definitions of file IO */
+
+#define ACPI_FILE_READING               0x01
+#define ACPI_FILE_WRITING               0x02
+#define ACPI_FILE_BINARY                0x04
+
+#define ACPI_FILE_BEGIN                 0x01
+#define ACPI_FILE_END                   0x02
+
 #endif                          /* __ACTYPES_H__ */
diff --git a/tools/power/acpi/os_specific/service_layers/oslibcfs.c b/tools/power/acpi/os_specific/service_layers/oslibcfs.c
new file mode 100644
index 000000000000..2da0ce885c8c
--- /dev/null
+++ b/tools/power/acpi/os_specific/service_layers/oslibcfs.c
@@ -0,0 +1,214 @@
+/******************************************************************************
+ *
+ * Module Name: oslibcfs - C library OSL for file IO
+ *
+ *****************************************************************************/
+
+/*
+ * 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.
+ */
+
+#include <acpi/acpi.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#define _COMPONENT          ACPI_OS_SERVICES
+ACPI_MODULE_NAME("oslibcfs")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_open_file
+ *
+ * PARAMETERS:  path                - File path
+ *              modes               - File operation type
+ *
+ * RETURN:      File descriptor.
+ *
+ * DESCRIPTION: Open a file for reading (ACPI_FILE_READING) or/and writing
+ *              (ACPI_FILE_WRITING).
+ *
+ ******************************************************************************/
+ACPI_FILE acpi_os_open_file(const char *path, u8 modes)
+{
+        ACPI_FILE file;
+        char modes_str[4];
+        u32 i = 0;
+
+        if (modes & ACPI_FILE_READING) {
+                modes_str[i++] = 'r';
+        }
+        if (modes & ACPI_FILE_WRITING) {
+                modes_str[i++] = 'w';
+        }
+        if (modes & ACPI_FILE_BINARY) {
+                modes_str[i++] = 'b';
+        }
+        modes_str[i++] = '\0';
+
+        file = fopen(path, modes_str);
+        if (!file) {
+                perror("Could not open file");
+        }
+
+        return (file);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_close_file
+ *
+ * PARAMETERS:  file                - File descriptor
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Close a file.
+ *
+ ******************************************************************************/
+
+void acpi_os_close_file(ACPI_FILE file)
+{
+        fclose(file);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_read_file
+ *
+ * PARAMETERS:  file                - File descriptor
+ *              buffer              - Data buffer
+ *              size                - Data block size
+ *              count               - Number of data blocks
+ *
+ * RETURN:      Size of successfully read buffer.
+ *
+ * DESCRIPTION: Read a file.
+ *
+ ******************************************************************************/
+
+int
+acpi_os_read_file(ACPI_FILE file, void *buffer, acpi_size size, acpi_size count)
+{
+        int length;
+
+        length = fread(buffer, size, count, file);
+        if (length < 0) {
+                perror("Error reading file");
+        }
+
+        return (length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_write_file
+ *
+ * PARAMETERS:  file                - File descriptor
+ *              buffer              - Data buffer
+ *              size                - Data block size
+ *              count               - Number of data blocks
+ *
+ * RETURN:      Size of successfully written buffer.
+ *
+ * DESCRIPTION: Write a file.
+ *
+ ******************************************************************************/
+
+int
+acpi_os_write_file(ACPI_FILE file,
+                   void *buffer, acpi_size size, acpi_size count)
+{
+        int length;
+
+        length = fwrite(buffer, size, count, file);
+        if (length < 0) {
+                perror("Error writing file");
+        }
+
+        return (length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_get_file_offset
+ *
+ * PARAMETERS:  file                - File descriptor
+ *
+ * RETURN:      Size of current position.
+ *
+ * DESCRIPTION: Get current file offset.
+ *
+ ******************************************************************************/
+
+long acpi_os_get_file_offset(ACPI_FILE file)
+{
+        long offset;
+
+        offset = ftell(file);
+
+        return (offset);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_os_set_file_offset
+ *
+ * PARAMETERS:  file                - File descriptor
+ *              offset              - File offset
+ *              from                - From begin/end of file
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Set current file offset.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_set_file_offset(ACPI_FILE file, long offset, u8 from)
+{
+        int ret = 0;
+
+        if (from == ACPI_FILE_BEGIN) {
+                ret = fseek(file, offset, SEEK_SET);
+        }
+        if (from == ACPI_FILE_END) {
+                ret = fseek(file, offset, SEEK_END);
+        }
+
+        if (ret < 0) {
+                return (AE_ERROR);
+        } else {
+                return (AE_OK);
+        }
+}