1 files changed, 93 insertions, 0 deletions
diff --git a/src/dev/x86/south_bridge/cmos.cc b/src/dev/x86/south_bridge/cmos.cc
new file mode 100644
index 000000000..164b23d84
--- /dev/null
+++ b/src/dev/x86/south_bridge/cmos.cc
@@ -0,0 +1,93 @@
+/*
+ * 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
+ */
+
+#include "dev/x86/south_bridge/cmos.hh"
+#include "mem/packet_access.hh"
+
+Tick
+X86ISA::Cmos::read(PacketPtr pkt)
+{
+    assert(pkt->getSize() == 1);
+    switch(pkt->getAddr() - addrRange.start)
+    {
+      case 0x0:
+        pkt->set(address);
+        break;
+      case 0x1:
+        pkt->set(readRegister(address));
+        break;
+      default:
+        panic("Read from undefined CMOS port.\n");
+    }
+    return latency;
+}
+
+Tick
+X86ISA::Cmos::write(PacketPtr pkt)
+{
+    assert(pkt->getSize() == 1);
+    switch(pkt->getAddr() - addrRange.start)
+    {
+      case 0x0:
+        address = pkt->get<uint8_t>();
+        break;
+      case 0x1:
+        writeRegister(address, pkt->get<uint8_t>());
+        break;
+      default:
+        panic("Write to undefined CMOS port.\n");
+    }
+    return latency;
+}
+
+uint8_t
+X86ISA::Cmos::readRegister(uint8_t reg)
+{
+    assert(reg < numRegs);
+    if (reg <= 0xD) {
+        return rtc.readData(reg);
+    } else {
+        warn("Reading non-volitile CMOS address %x as %x.\n", reg, regs[reg]);
+    }
+    return regs[reg];
+}
+
+void
+X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
+{
+    assert(reg < numRegs);
+    if (reg <= 0xD) {
+        rtc.writeData(reg, val);
+        return;
+    } else {
+        warn("Writing non-volitile CMOS address %x with %x.\n", reg, val);
+    }
+    regs[reg] = val;
+}