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>

1 files changed, 135 insertions, 0 deletions

diff --git a/src/arch/arm/freebsd/system.hh b/src/arch/arm/freebsd/system.hh
new file mode 100644
index 000000000..e0a533e13
--- /dev/null
+++ b/src/arch/arm/freebsd/system.hh
@@ -0,0 +1,135 @@
+/*
+ * 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 __ARCH_ARM_FREEBSD_SYSTEM_HH__
+#define __ARCH_ARM_FREEBSD_SYSTEM_HH__
+
+#include <cstdio>
+#include <map>
+#include <string>
+#include <vector>
+
+#include "arch/arm/system.hh"
+#include "base/output.hh"
+#include "kern/freebsd/events.hh"
+#include "params/FreebsdArmSystem.hh"
+#include "sim/core.hh"
+
+class DumpStatsPCEventF;
+
+class FreebsdArmSystem : public GenericArmSystem
+{
+  protected:
+    DumpStatsPCEventF *dumpStatsPCEventF;
+
+  public:
+    /** Boilerplate params code */
+    typedef FreebsdArmSystemParams Params;
+    const Params *
+    params() const
+    {
+        return dynamic_cast<const Params *>(_params);
+    }
+
+    /** When enabled, dump stats/task info on context switches for
+     *  Streamline and per-thread cache occupancy studies, etc. */
+    bool enableContextSwitchStatsDump;
+
+    /** This map stores a mapping of OS process IDs to internal Task IDs. The
+     * mapping is done because the stats system doesn't tend to like vectors
+     * that are much greater than 1000 items and the entire process space is
+     * 65K. */
+    std::map<uint32_t, uint32_t> taskMap;
+
+    /** This is a file that is placed in the run directory that prints out
+     * mappings between taskIds and OS process IDs */
+    std::ostream* taskFile;
+
+    FreebsdArmSystem(Params *p);
+    ~FreebsdArmSystem();
+
+    void initState();
+
+    bool adderBootUncacheable(Addr a);
+
+    void startup();
+
+    /** This function creates a new task Id for the given pid.
+     * @param tc thread context that is currentyl executing  */
+    void mapPid(ThreadContext* tc, uint32_t pid);
+
+  private:
+    /** Event to halt the simulator if the kernel calls panic()  */
+    PCEvent *kernelPanicEvent;
+
+    /** Event to halt the simulator if the kernel calls oopses  */
+    PCEvent *kernelOopsEvent;
+
+    /**
+     * PC based event to skip udelay(<time>) calls and quiesce the
+     * processor for the appropriate amount of time. This is not functionally
+     * required but does speed up simulation.
+     */
+    FreeBSD::UDelayEvent *uDelaySkipEvent;
+
+    /** Another PC based skip event for const_udelay(). Similar to the udelay
+     * skip, but this function precomputes the first multiply that is done
+     * in the generic case since the parameter is known at compile time.
+     * Thus we need to do some division to get back to us.
+     */
+    FreeBSD::UDelayEvent *constUDelaySkipEvent;
+
+    /** These variables store addresses of important data structures
+     * that are normaly kept coherent at boot with cache mainetence operations.
+     * Since these operations aren't supported in gem5, we keep them coherent
+     * by making them uncacheable until all processors in the system boot.
+     */
+    Addr secDataPtrAddr;
+    Addr secDataAddr;
+    Addr penReleaseAddr;
+    Addr pen64ReleaseAddr;
+    Addr bootReleaseAddr;
+};
+
+class DumpStatsPCEventF : public PCEvent
+{
+  public:
+    DumpStatsPCEventF(PCEventQueue *q, const std::string &desc, Addr addr)
+        : PCEvent(q, desc, addr)
+    {}
+
+    virtual void process(ThreadContext* tc);
+};
+
+
+#endif // __ARCH_ARM_FREEBSD_SYSTEM_HH__
+