X86: Make the e820 table manually or automatically configurable from python.

1 files changed, 103 insertions, 0 deletions

diff --git a/src/arch/x86/bios/e820.cc b/src/arch/x86/bios/e820.cc
new file mode 100644
index 000000000..47adb703a
--- /dev/null
+++ b/src/arch/x86/bios/e820.cc
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2008 The Hewlett-Packard Development Company
+ * All rights reserved.
+ *
+ * Redistribution and use of this software in source and binary forms,
+ * with or without modification, are permitted provided that the
+ * following conditions are met:
+ *
+ * The software must be used only for Non-Commercial Use which means any
+ * use which is NOT directed to receiving any direct monetary
+ * compensation for, or commercial advantage from such use.  Illustrative
+ * examples of non-commercial use are academic research, personal study,
+ * teaching, education and corporate research & development.
+ * Illustrative examples of commercial use are distributing products for
+ * commercial advantage and providing services using the software for
+ * commercial advantage.
+ *
+ * If you wish to use this software or functionality therein that may be
+ * covered by patents for commercial use, please contact:
+ *     Director of Intellectual Property Licensing
+ *     Office of Strategy and Technology
+ *     Hewlett-Packard Company
+ *     1501 Page Mill Road
+ *     Palo Alto, California  94304
+ *
+ * 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.  No right of
+ * sublicense is granted herewith.  Derivatives of the software and
+ * output created using the software may be prepared, but only for
+ * Non-Commercial Uses.  Derivatives of the software may be shared with
+ * others provided: (i) the others agree to abide by the list of
+ * conditions herein which includes the Non-Commercial Use restrictions;
+ * and (ii) such Derivatives of the software include the above copyright
+ * notice to acknowledge the contribution from this software where
+ * applicable, this list of conditions and the disclaimer below.
+ *
+ * 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
+ */
+
+#include "arch/x86/bios/e820.hh"
+#include "arch/x86/isa_traits.hh"
+#include "mem/port.hh"
+#include "sim/byteswap.hh"
+
+using namespace std;
+using namespace X86ISA;
+
+template<class T>
+void writeVal(T val, Port * port, Addr &addr)
+{
+    T guestVal = htog(val);
+    port->writeBlob(addr, (uint8_t *)&guestVal, sizeof(T));
+    addr += sizeof(T);
+}
+
+void X86ISA::E820Table::writeTo(Port * port, Addr countAddr, Addr addr)
+{
+    uint8_t e820Nr = entries.size();
+
+    // Make sure the number of entries isn't bigger than what the kernel
+    // would be capable of handling.
+    assert(e820Nr <= 128);
+
+    uint8_t guestE820Nr = htog(e820Nr);
+
+    port->writeBlob(countAddr, (uint8_t *)&guestE820Nr, sizeof(guestE820Nr));
+
+    for (int i = 0; i < e820Nr; i++) {
+        writeVal(entries[i]->addr, port, addr);
+        writeVal(entries[i]->size, port, addr);
+        writeVal(entries[i]->type, port, addr);
+    }
+}
+
+E820Table *
+X86E820TableParams::create()
+{
+    return new E820Table(this);
+}
+
+E820Entry *
+X86E820EntryParams::create()
+{
+    return new E820Entry(this);
+}