isa.hh revision 6337:cac56cd6b015 
1/*
2 * Copyright (c) 2009 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#ifndef __ARCH_SPARC_ISA_HH__
32#define __ARCH_SPARC_ISA_HH__
33
34#include "arch/sparc/registers.hh"
35#include "arch/sparc/types.hh"
36#include "config/full_system.hh"
37#include "cpu/cpuevent.hh"
38
39#include <string>
40#include <ostream>
41
42class Checkpoint;
43class EventManager;
44class ThreadContext;
45
46namespace SparcISA
47{
48    class ISA
49    {
50      private:
51
52        /* ASR Registers */
53        //uint64_t y;           // Y (used in obsolete multiplication)
54        //uint8_t ccr;          // Condition Code Register
55        uint8_t asi;            // Address Space Identifier
56        uint64_t tick;          // Hardware clock-tick counter
57        uint8_t fprs;           // Floating-Point Register State
58        uint64_t gsr;           // General Status Register
59        uint64_t softint;
60        uint64_t tick_cmpr;     // Hardware tick compare registers
61        uint64_t stick;         // Hardware clock-tick counter
62        uint64_t stick_cmpr;    // Hardware tick compare registers
63
64
65        /* Privileged Registers */
66        uint64_t tpc[MaxTL];    // Trap Program Counter (value from
67                                // previous trap level)
68        uint64_t tnpc[MaxTL];   // Trap Next Program Counter (value from
69                                // previous trap level)
70        uint64_t tstate[MaxTL]; // Trap State
71        uint16_t tt[MaxTL];     // Trap Type (Type of trap which occured
72                                // on the previous level)
73        uint64_t tba;           // Trap Base Address
74
75        uint16_t pstate;        // Process State Register
76        uint8_t tl;             // Trap Level
77        uint8_t pil;            // Process Interrupt Register
78        uint8_t cwp;            // Current Window Pointer
79        //uint8_t cansave;      // Savable windows
80        //uint8_t canrestore;   // Restorable windows
81        //uint8_t cleanwin;     // Clean windows
82        //uint8_t otherwin;     // Other windows
83        //uint8_t wstate;               // Window State
84        uint8_t gl;             // Global level register
85
86        /** Hyperprivileged Registers */
87        uint64_t hpstate;       // Hyperprivileged State Register
88        uint64_t htstate[MaxTL];// Hyperprivileged Trap State Register
89        uint64_t hintp;
90        uint64_t htba;          // Hyperprivileged Trap Base Address register
91        uint64_t hstick_cmpr;   // Hardware tick compare registers
92
93        uint64_t strandStatusReg;// Per strand status register
94
95        /** Floating point misc registers. */
96        uint64_t fsr;           // Floating-Point State Register
97
98        /** MMU Internal Registers */
99        uint16_t priContext;
100        uint16_t secContext;
101        uint16_t partId;
102        uint64_t lsuCtrlReg;
103
104        uint64_t scratchPad[8];
105
106        uint64_t cpu_mondo_head;
107        uint64_t cpu_mondo_tail;
108        uint64_t dev_mondo_head;
109        uint64_t dev_mondo_tail;
110        uint64_t res_error_head;
111        uint64_t res_error_tail;
112        uint64_t nres_error_head;
113        uint64_t nres_error_tail;
114
115        // These need to check the int_dis field and if 0 then
116        // set appropriate bit in softint and checkinterrutps on the cpu
117#if FULL_SYSTEM
118        void  setFSReg(int miscReg, const MiscReg &val, ThreadContext *tc);
119        MiscReg readFSReg(int miscReg, ThreadContext * tc);
120
121        // Update interrupt state on softint or pil change
122        void checkSoftInt(ThreadContext *tc);
123
124        /** Process a tick compare event and generate an interrupt on the cpu if
125         * appropriate. */
126        void processTickCompare(ThreadContext *tc);
127        void processSTickCompare(ThreadContext *tc);
128        void processHSTickCompare(ThreadContext *tc);
129
130        typedef CpuEventWrapper<ISA,
131                &ISA::processTickCompare> TickCompareEvent;
132        TickCompareEvent *tickCompare;
133
134        typedef CpuEventWrapper<ISA,
135                &ISA::processSTickCompare> STickCompareEvent;
136        STickCompareEvent *sTickCompare;
137
138        typedef CpuEventWrapper<ISA,
139                &ISA::processHSTickCompare> HSTickCompareEvent;
140        HSTickCompareEvent *hSTickCompare;
141#endif
142
143        static const int NumGlobalRegs = 8;
144        static const int NumWindowedRegs = 24;
145        static const int WindowOverlap = 8;
146
147        static const int TotalGlobals = (MaxGL + 1) * NumGlobalRegs;
148        static const int RegsPerWindow = NumWindowedRegs - WindowOverlap;
149        static const int TotalWindowed = NWindows * RegsPerWindow;
150
151        enum InstIntRegOffsets {
152            CurrentGlobalsOffset = 0,
153            CurrentWindowOffset = CurrentGlobalsOffset + NumGlobalRegs,
154            MicroIntOffset = CurrentWindowOffset + NumWindowedRegs,
155            NextGlobalsOffset = MicroIntOffset + NumMicroIntRegs,
156            NextWindowOffset = NextGlobalsOffset + NumGlobalRegs,
157            PreviousGlobalsOffset = NextWindowOffset + NumWindowedRegs,
158            PreviousWindowOffset = PreviousGlobalsOffset + NumGlobalRegs,
159            TotalInstIntRegs = PreviousWindowOffset + NumWindowedRegs
160        };
161
162        RegIndex intRegMap[TotalInstIntRegs];
163        void installWindow(int cwp, int offset);
164        void installGlobals(int gl, int offset);
165        void reloadRegMap();
166
167      public:
168
169        void clear();
170
171        void serialize(EventManager *em, std::ostream & os);
172
173        void unserialize(EventManager *em, Checkpoint *cp,
174                         const std::string & section);
175
176      protected:
177
178        bool isHyperPriv() { return (hpstate & (1 << 2)); }
179        bool isPriv() { return (hpstate & (1 << 2)) || (pstate & (1 << 2)); }
180        bool isNonPriv() { return !isPriv(); }
181
182      public:
183
184        MiscReg readMiscRegNoEffect(int miscReg);
185        MiscReg readMiscReg(int miscReg, ThreadContext *tc);
186
187        void setMiscRegNoEffect(int miscReg, const MiscReg val);
188        void setMiscReg(int miscReg, const MiscReg val,
189                ThreadContext *tc);
190
191        int
192        flattenIntIndex(int reg)
193        {
194            assert(reg < TotalInstIntRegs);
195            RegIndex flatIndex = intRegMap[reg];
196            assert(flatIndex < NumIntRegs);
197            return flatIndex;
198        }
199
200        int
201        flattenFloatIndex(int reg)
202        {
203            return reg;
204        }
205
206        ISA()
207        {
208            clear();
209        }
210    };
211}
212
213#endif
214