cmos.hh revision 9808 
18612Stushar@csail.mit.edu/*
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88612Stushar@csail.mit.edu * notice, this list of conditions and the following disclaimer;
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148612Stushar@csail.mit.edu * this software without specific prior written permission.
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278612Stushar@csail.mit.edu *
288612Stushar@csail.mit.edu * Authors: Gabe Black
298612Stushar@csail.mit.edu */
308612Stushar@csail.mit.edu
3111320Ssteve.reinhardt@amd.com#ifndef __DEV_X86_CMOS_HH__
328612Stushar@csail.mit.edu#define __DEV_X86_CMOS_HH__
338612Stushar@csail.mit.edu
348612Stushar@csail.mit.edu#include "dev/io_device.hh"
358612Stushar@csail.mit.edu#include "dev/mc146818.hh"
368612Stushar@csail.mit.edu#include "params/Cmos.hh"
378612Stushar@csail.mit.edu
388612Stushar@csail.mit.edunamespace X86ISA
398612Stushar@csail.mit.edu{
408612Stushar@csail.mit.edu
418612Stushar@csail.mit.educlass IntSourcePin;
428612Stushar@csail.mit.edu
438612Stushar@csail.mit.educlass Cmos : public BasicPioDevice
44{
45  protected:
46    Tick latency;
47
48    uint8_t address;
49
50    static const int numRegs = 128;
51
52    uint8_t regs[numRegs];
53
54    uint8_t readRegister(uint8_t reg);
55    void writeRegister(uint8_t reg, uint8_t val);
56
57    class X86RTC : public MC146818
58    {
59      protected:
60        IntSourcePin * intPin;
61      public:
62        X86RTC(EventManager *em, const std::string &n, const struct tm time,
63                bool bcd, Tick frequency, IntSourcePin * _intPin) :
64            MC146818(em, n, time, bcd, frequency), intPin(_intPin)
65        {
66        }
67      protected:
68        void handleEvent();
69    } rtc;
70
71  public:
72    typedef CmosParams Params;
73
74    Cmos(const Params *p) : BasicPioDevice(p, 2), latency(p->pio_latency),
75        rtc(this, "rtc", p->time, true, ULL(5000000000), p->int_pin)
76    {
77        memset(regs, 0, numRegs * sizeof(uint8_t));
78        address = 0;
79    }
80
81    Tick read(PacketPtr pkt);
82
83    Tick write(PacketPtr pkt);
84
85    virtual void serialize(std::ostream &os);
86    virtual void unserialize(Checkpoint *cp, const std::string &section);
87
88};
89
90} // namespace X86ISA
91
92#endif //__DEV_X86_CMOS_HH__
93