1 files changed, 171 insertions, 0 deletions
diff --git a/source/os_specific/service_layers/osunixmap.c b/source/os_specific/service_layers/osunixmap.c
new file mode 100644
index 000000000000..6b6304e0ef0e
--- /dev/null
+++ b/source/os_specific/service_layers/osunixmap.c
@@ -0,0 +1,171 @@
+/******************************************************************************
+ *
+ * Module Name: osunixmap - Unix OSL for file mappings
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2013, 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 "acpidump.h"
+#include <unistd.h>
+#include <sys/mman.h>
+#ifdef _FreeBSD
+#include <sys/param.h>
+#endif
+
+#define _COMPONENT          ACPI_OS_SERVICES
+        ACPI_MODULE_NAME    ("osunixmap")
+
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#ifdef _FreeBSD
+#define MMAP_FLAGS          MAP_SHARED
+#else
+#define MMAP_FLAGS          MAP_PRIVATE
+#endif
+
+#define SYSTEM_MEMORY       "/dev/mem"
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiOsGetPageSize
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Page size of the platform.
+ *
+ * DESCRIPTION: Obtain page size of the platform.
+ *
+ ******************************************************************************/
+
+static ACPI_SIZE
+AcpiOsGetPageSize (
+    void)
+{
+
+#ifdef PAGE_SIZE
+    return PAGE_SIZE;
+#else
+    return sysconf (_SC_PAGESIZE);
+#endif
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiOsMapMemory
+ *
+ * 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 local address space.
+ *
+ *****************************************************************************/
+
+void *
+AcpiOsMapMemory (
+    ACPI_PHYSICAL_ADDRESS   Where,
+    ACPI_SIZE               Length)
+{
+    UINT8                   *MappedMemory;
+    ACPI_PHYSICAL_ADDRESS   Offset;
+    ACPI_SIZE               PageSize;
+    int                     fd;
+
+
+    fd = open (SYSTEM_MEMORY, O_RDONLY | O_BINARY);
+    if (fd < 0)
+    {
+        fprintf (stderr, "Cannot open %s\n", SYSTEM_MEMORY);
+        return (NULL);
+    }
+
+    /* Align the offset to use mmap */
+
+    PageSize = AcpiOsGetPageSize ();
+    Offset = Where % PageSize;
+
+    /* Map the table header to get the length of the full table */
+
+    MappedMemory = mmap (NULL, (Length + Offset), PROT_READ, MMAP_FLAGS,
+        fd, (Where - Offset));
+    if (MappedMemory == MAP_FAILED)
+    {
+        fprintf (stderr, "Cannot map %s\n", SYSTEM_MEMORY);
+        close (fd);
+        return (NULL);
+    }
+
+    close (fd);
+    return (ACPI_CAST8 (MappedMemory + Offset));
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    AcpiOsUnmapMemory
+ *
+ * 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
+AcpiOsUnmapMemory (
+    void                    *Where,
+    ACPI_SIZE               Length)
+{
+    ACPI_PHYSICAL_ADDRESS   Offset;
+    ACPI_SIZE               PageSize;
+
+
+    PageSize = AcpiOsGetPageSize ();
+    Offset = (ACPI_PHYSICAL_ADDRESS) Where % PageSize;
+    munmap ((UINT8 *) Where - Offset, (Length + Offset));
+}