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author | Gabe Black <gblack@eecs.umich.edu> | 2008-10-11 01:13:11 -0700 |
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committer | Gabe Black <gblack@eecs.umich.edu> | 2008-10-11 01:13:11 -0700 |
commit | f22c7d48f3b99994c697075f5cc3b59c72f84092 (patch) | |
tree | 08e815794cbf29b528b8dded19755a6abc13581c /src/dev/x86/cmos.hh | |
parent | 8c5dfa453296c5a87a46c409f68e0ef50ebfceb6 (diff) | |
download | gem5-f22c7d48f3b99994c697075f5cc3b59c72f84092.tar.xz |
X86: Change the CMOS from a sub-device to a real SimObject
--HG--
rename : src/dev/x86/south_bridge/cmos.cc => src/dev/x86/cmos.cc
rename : src/dev/x86/south_bridge/cmos.hh => src/dev/x86/cmos.hh
Diffstat (limited to 'src/dev/x86/cmos.hh')
-rw-r--r-- | src/dev/x86/cmos.hh | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/dev/x86/cmos.hh b/src/dev/x86/cmos.hh new file mode 100644 index 000000000..04df9dd04 --- /dev/null +++ b/src/dev/x86/cmos.hh @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2008 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 + */ + +#ifndef __DEV_X86_CMOS_HH__ +#define __DEV_X86_CMOS_HH__ + +#include "dev/io_device.hh" +#include "dev/mc146818.hh" +#include "params/Cmos.hh" + +namespace X86ISA +{ + +class Cmos : public BasicPioDevice +{ + protected: + Tick latency; + + uint8_t address; + + static const int numRegs = 128; + + uint8_t regs[numRegs]; + + uint8_t readRegister(uint8_t reg); + void writeRegister(uint8_t reg, uint8_t val); + + class X86RTC : public MC146818 + { + public: + X86RTC(EventManager *em, const std::string &n, const struct tm time, + bool bcd, Tick frequency) : + MC146818(em, n, time, bcd, frequency) + { + } + protected: + void handleEvent() + { + return; + } + } rtc; + + public: + typedef CmosParams Params; + + Cmos(const Params *p) : BasicPioDevice(p), latency(p->pio_latency), + rtc(this, "rtc", p->time, true, ULL(5000000000)) + { + pioSize = 2; + memset(regs, 0, numRegs * sizeof(uint8_t)); + address = 0; + } + + Tick read(PacketPtr pkt); + + Tick write(PacketPtr pkt); +}; + +}; // namespace X86ISA + +#endif //__DEV_X86_CMOS_HH__ |