Adding some more things toward having cpu->mem test in place. Still need to work on compilation issues.

mem/physical.cc:
mem/physical.hh:
    Added a stripped down version of the physical memory object

--HG--
extra : convert_revision : 26826fb316f4cac900ec648fa268f1d95bc960f1

1 files changed, 90 insertions, 0 deletions

diff --git a/mem/physical.hh b/mem/physical.hh
new file mode 100644
index 000000000..5410024e5
--- /dev/null
+++ b/mem/physical.hh
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2001-2005 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.
+ */
+
+/* @file
+ */
+
+#ifndef __PHYSICAL_MEMORY_HH__
+#define __PHYSICAL_MEMORY_HH__
+
+#include "base/range.hh"
+#include "mem/memory.hh"
+
+//
+// Functional model for a contiguous block of physical memory. (i.e. RAM)
+//
+class PhysicalMemory : public Memory
+{
+  private:
+    // prevent copying of a MainMemory object
+    PhysicalMemory(const PhysicalMemory &specmem);
+    const PhysicalMemory &operator=(const PhysicalMemory &specmem);
+
+  protected:
+    Addr base_addr;
+    Addr pmem_size;
+    uint8_t *pmem_addr;
+    int page_ptr;
+
+  public:
+    Addr new_page();
+    uint64_t size() { return pmem_size; }
+
+  public:
+    PhysicalMemory(const std::string &n);
+    virtual ~PhysicalMemory();
+
+  protected:
+    // error handling for prot_* functions
+    void prot_access_error(Addr addr, int size, const std::string &func);
+
+  public:
+
+    // Read/Write arbitrary amounts of data to simulated memory space
+    virtual void prot_read(Addr addr, uint8_t *p, int size);
+    virtual void prot_write(Addr addr, const uint8_t *p, int size);
+    virtual void prot_memset(Addr addr, uint8_t val, int size);
+
+    // fast back-door memory access for vtophys(), remote gdb, etc.
+    uint64_t phys_read_qword(Addr addr) const;
+
+  public:
+    virtual void serialize(std::ostream &os);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
+};
+
+PhysicalMemory::phys_read_qword(Addr addr) const
+{
+    if (addr + sizeof(uint64_t) > pmem_size)
+        return 0;
+
+    return *(uint64_t *)(pmem_addr + addr);
+}
+
+
+#endif //__PHYSICAL_MEMORY_HH__