arch, base, dev, kern, sym: FreeBSD support

This adds support for FreeBSD/aarch64 FS and SE mode (basic set of syscalls only)

Committed by: Nilay Vaish <nilay@cs.wisc.edu>

3 files changed, 259 insertions, 0 deletions

diff --git a/src/kern/freebsd/events.cc b/src/kern/freebsd/events.cc
new file mode 100644
index 000000000..2f4ceb056
--- /dev/null
+++ b/src/kern/freebsd/events.cc
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by the University of Cambridge Computer
+ * Laboratory as part of the CTSRD Project, with support from the UK Higher
+ * Education Innovation Fund (HEIF).
+ *
+ * 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.
+ */
+
+#include "kern/freebsd/events.hh"
+
+#include <sstream>
+
+#include "arch/utility.hh"
+#include "base/trace.hh"
+#include "cpu/thread_context.hh"
+#include "debug/DebugPrintf.hh"
+#include "kern/system_events.hh"
+#include "sim/arguments.hh"
+#include "sim/pseudo_inst.hh"
+#include "sim/system.hh"
+
+namespace FreeBSD {
+
+void
+UDelayEvent::process(ThreadContext *tc)
+{
+    int arg_num;
+
+    arg_num = 0;
+
+    // Get the time in native size
+    uint64_t time = TheISA::getArgument(tc, arg_num,  (uint16_t)-1, false);
+
+    //DPRINTFN("DELAY(%d)\n", time);
+
+    // convert parameter to ns
+    if (argDivToNs)
+        time /= argDivToNs;
+
+    time *= argMultToNs;
+
+    SkipFuncEvent::process(tc);
+
+    PseudoInst::quiesceNs(tc, time);
+}
+
+} // namespace FreeBSD
diff --git a/src/kern/freebsd/events.hh b/src/kern/freebsd/events.hh
new file mode 100644
index 000000000..1d3faa935
--- /dev/null
+++ b/src/kern/freebsd/events.hh
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by the University of Cambridge Computer
+ * Laboratory as part of the CTSRD Project, with support from the UK Higher
+ * Education Innovation Fund (HEIF).
+ *
+ * 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.
+ */
+
+#ifndef __KERN_FREEBSD_EVENTS_HH__
+#define __KERN_FREEBSD_EVENTS_HH__
+
+#include "kern/system_events.hh"
+
+namespace FreeBSD {
+
+/** A class to skip udelay() and related calls in the kernel.
+ * This class has two additional parameters that take the argument to udelay and
+ * manipulated it to come up with ns and eventually ticks to quiesce for.
+ * See descriptions of argDivToNs and argMultToNs below.
+ */
+class UDelayEvent : public SkipFuncEvent
+{
+  private:
+    /** value to divide arg by to create ns. This is present beacues the linux
+     * kernel code sometime precomputes the first multiply that is done in
+     * udelay() if the parameter is a constant. We need to undo it so here is
+     * how. */
+    uint64_t argDivToNs;
+
+    /** value to multiple arg by to create ns. Nominally, this is 1000 to
+     * convert us to ns, but since linux can do some preprocessing of constant
+     * values something else might be required. */
+    uint64_t argMultToNs;
+
+  public:
+    UDelayEvent(PCEventQueue *q, const std::string &desc, Addr addr,
+            uint64_t mult, uint64_t div)
+        : SkipFuncEvent(q, desc, addr), argDivToNs(div), argMultToNs(mult) {}
+    virtual void process(ThreadContext *xc);
+};
+
+}
+
+#endif
diff --git a/src/kern/freebsd/freebsd.hh b/src/kern/freebsd/freebsd.hh
new file mode 100644
index 000000000..e3d5cf5be
--- /dev/null
+++ b/src/kern/freebsd/freebsd.hh
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * This software was developed by the University of Cambridge Computer
+ * Laboratory as part of the CTSRD Project, with support from the UK Higher
+ * Education Innovation Fund (HEIF).
+ *
+ * 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.
+ */
+
+#ifndef __FREEBSD_HH__
+#define __FREEBSD_HH__
+
+#include <string>
+
+#include "base/types.hh"
+#include "kern/operatingsystem.hh"
+
+class ThreadContext;
+class LiveProcess;
+
+///
+/// This class encapsulates the types, structures, constants,
+/// functions, and syscall-number mappings specific to the Alpha FreeBSD
+/// syscall interface.
+///
+class FreeBSD : public OperatingSystem
+{
+
+  public:
+
+    //@{
+    /// Basic FreeBSD types.
+    typedef uint64_t size_t;
+    typedef uint64_t off_t;
+    typedef int64_t time_t;
+    typedef int64_t clock_t;
+    typedef uint32_t uid_t;
+    typedef uint32_t gid_t;
+    //@}
+
+    /// Clock ticks per second, for times().
+    static const int M5_SC_CLK_TCK = 100;
+
+    //@{
+    /// ioctl() command codes.
+    static const unsigned TGT_TIOCGETA   = 0x402c7413;
+    static const unsigned TGT_TIOCSETA   = 0x802c7414;
+    static const unsigned TGT_TIOCSETAW  = 0x802c7415;
+    static const unsigned TGT_FIONREAD   = 0x4004667f;
+    //@}
+
+    /// Return true for the ioctl codes for which we return ENOTTY
+    /// *without* printing a warning, since we know that ENOTTY is the
+    /// correct thing to return (and not just a sign that we don't
+    /// recognize the ioctl code.
+    static bool
+    isTtyReq(unsigned req)
+    {
+        switch (req) {
+          case TGT_TIOCGETA:
+          case TGT_TIOCSETA:
+          case TGT_TIOCSETAW:
+          case TGT_FIONREAD:
+            return true;
+          default:
+            return false;
+        }
+    }
+
+    /// Resource constants for getrlimit().
+    static const unsigned TGT_RLIMIT_CPU = 0;
+    static const unsigned TGT_RLIMIT_FSIZE = 1;
+    static const unsigned TGT_RLIMIT_DATA = 2;
+    static const unsigned TGT_RLIMIT_STACK = 3;
+    static const unsigned TGT_RLIMIT_CORE = 4;
+    static const unsigned TGT_RLIMIT_RSS = 5;
+    static const unsigned TGT_RLIMIT_MEMLOCK = 6;
+    static const unsigned TGT_RLIMIT_NPROC = 7;
+    static const unsigned TGT_RLIMIT_NOFILE = 8;
+    static const unsigned TGT_RLIMIT_SBSIZE = 9;
+    static const unsigned TGT_RLIMIT_VMEM = 10;
+    static const unsigned TGT_RLIMIT_AS = TGT_RLIMIT_VMEM;
+    static const unsigned TGT_RLIMIT_NPTS = 11;
+    static const unsigned TGT_RLIMIT_SWAP = 12;
+    static const unsigned TGT_RLIMIT_KQUEUES = 13;
+
+    /// For getrusage().
+    static const int TGT_RUSAGE_SELF     = 0;
+    static const int TGT_RUSAGE_CHILDREN = -1;
+    static const int TGT_RUSAGE_THREAD   = 1;
+
+    // for *at syscalls
+    static const int TGT_AT_FDCWD   = -100;
+
+};  // class FreeBSD
+
+#endif // __FREEBSD_HH__