Adding gem5 source to svn.

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1819 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

simulators/gem5/src/kern/operatingsystem.hh

@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2004-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * 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;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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 MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER 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.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __KERN_OPERATINGSYSTEM_HH__
+#define __KERN_OPERATINGSYSTEM_HH__
+
+#include "base/types.hh"
+
+#include <string>
+
+class LiveProcess;
+class ThreadContext;
+
+/// This struct is used to build an target-OS-dependent table that
+/// maps the target's open() flags to the host open() flags.
+struct OpenFlagTransTable {
+    int tgtFlag;        //!< Target system flag value.
+    int hostFlag;       //!< Corresponding host system flag value.
+};
+
+
+///
+/// This class encapsulates the types, structures, constants,
+/// functions, and syscall-number mappings specific to an operating system
+/// syscall interface.
+///
+class OperatingSystem {
+
+  public:
+
+    /// Stat buffer.  Note that we can't call it 'stat' since that
+    /// gets #defined to something else on some systems. This type
+    /// can be specialized by architecture specific "Linux" classes
+    typedef void tgt_stat;
+
+    // same for stat64
+    typedef void tgt_stat64;
+
+    /// Length of strings in struct utsname (plus 1 for null char).
+    static const int _SYS_NMLN = 65;
+
+    /// Interface struct for uname().
+    typedef struct {
+        char sysname[_SYS_NMLN];        //!< System name.
+        char nodename[_SYS_NMLN];       //!< Node name.
+        char release[_SYS_NMLN];        //!< OS release.
+        char version[_SYS_NMLN];        //!< OS version.
+        char machine[_SYS_NMLN];        //!< Machine type.
+    } utsname;
+
+    /// Limit struct for getrlimit/setrlimit.
+    typedef struct {
+        uint64_t  rlim_cur;     //!< soft limit
+        uint64_t  rlim_max;     //!< hard limit
+    } rlimit;
+
+    /// For gettimeofday().
+    typedef struct {
+        int64_t tv_sec;         //!< seconds
+        int64_t tv_usec;        //!< microseconds
+    } timeval;
+
+    // For writev/readv
+    typedef struct {
+        uint64_t iov_base; // void *
+        uint64_t iov_len;
+    } tgt_iovec;
+
+
+    /// For getrusage().
+    typedef struct {
+        timeval ru_utime;       //!< user time used
+        timeval ru_stime;       //!< system time used
+        int64_t ru_maxrss;              //!< max rss
+        int64_t ru_ixrss;               //!< integral shared memory size
+        int64_t ru_idrss;               //!< integral unshared data "
+        int64_t ru_isrss;               //!< integral unshared stack "
+        int64_t ru_minflt;              //!< page reclaims - total vmfaults
+        int64_t ru_majflt;              //!< page faults
+        int64_t ru_nswap;               //!< swaps
+        int64_t ru_inblock;             //!< block input operations
+        int64_t ru_oublock;             //!< block output operations
+        int64_t ru_msgsnd;              //!< messages sent
+        int64_t ru_msgrcv;              //!< messages received
+        int64_t ru_nsignals;            //!< signals received
+        int64_t ru_nvcsw;               //!< voluntary context switches
+        int64_t ru_nivcsw;              //!< involuntary "
+    } rusage;
+
+    static int openSpecialFile(std::string path, LiveProcess *process, ThreadContext *tc);
+
+    static const bool mmapGrowsUp = true;
+
+    static bool mmapGrowsDown() { return false; }
+
+};  // class OperatingSystem
+
+#endif // __OPERATINGSYSTEM_HH__