1/*
2 * Copyright (c) 2002-2005 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: Kevin Lim
29 */
30
31#error "Cannot include this file"
32
33/**
34 * The ExecContext is not a usable class. It is simply here for
35 * documentation purposes. It shows the interface that is used by the
36 * ISA to access and change CPU state.
37 */
38class ExecContext {
39 // The register accessor methods provide the index of the
40 // instruction's operand (e.g., 0 or 1), not the architectural
41 // register index, to simplify the implementation of register
42 // renaming. We find the architectural register index by indexing
43 // into the instruction's own operand index table. Note that a
44 // raw pointer to the StaticInst is provided instead of a
45 // ref-counted StaticInstPtr to reduce overhead. This is fine as
46 // long as these methods don't copy the pointer into any long-term
47 // storage (which is pretty hard to imagine they would have reason
48 // to do).
49
50 /** Reads an integer register. */
51 uint64_t readIntReg(const StaticInst *si, int idx);
52
53 /** Reads a floating point register of a specific width. */
54 FloatReg readFloatReg(const StaticInst *si, int idx, int width);
55
56 /** Reads a floating point register of single register width. */
57 FloatReg readFloatReg(const StaticInst *si, int idx);
58
59 /** Reads a floating point register of a specific width in its
60 * binary format, instead of by value. */
61 FloatRegBits readFloatRegBits(const StaticInst *si, int idx, int width);
62
63 /** Reads a floating point register in its binary format, instead
64 * of by value. */
65 FloatRegBits readFloatRegBits(const StaticInst *si, int idx);
66
67 /** Sets an integer register to a value. */
68 void setIntReg(const StaticInst *si, int idx, uint64_t val);
69
70 /** Sets a floating point register of a specific width to a value. */
71 void setFloatReg(const StaticInst *si, int idx, FloatReg val, int width);
72
73 /** Sets a floating point register of single width to a value. */
74 void setFloatReg(const StaticInst *si, int idx, FloatReg val);
75
76 /** Sets the bits of a floating point register of a specific width
77 * to a binary value. */
78 void setFloatRegBits(const StaticInst *si, int idx,
79 FloatRegBits val, int width);
80
81 /** Sets the bits of a floating point register of single width
82 * to a binary value. */
83 void setFloatRegBits(const StaticInst *si, int idx, FloatRegBits val);
84
85 /** Reads the PC. */
86 uint64_t readPC();
87 /** Reads the NextPC. */
88 uint64_t readNextPC();
89 /** Reads the Next-NextPC. Only for architectures like SPARC or MIPS. */
90 uint64_t readNextNPC();
91
92 /** Sets the PC. */
93 void setPC(uint64_t val);
94 /** Sets the NextPC. */
95 void setNextPC(uint64_t val);
96 /** Sets the Next-NextPC. Only for architectures like SPARC or MIPS. */
97 void setNextNPC(uint64_t val);
98
99 /** Reads a miscellaneous register. */
100 MiscReg readMiscReg(int misc_reg);
101
102 /** Reads a miscellaneous register, handling any architectural
103 * side effects due to reading that register. */
| 1/*
2 * Copyright (c) 2002-2005 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: Kevin Lim
29 */
30
31#error "Cannot include this file"
32
33/**
34 * The ExecContext is not a usable class. It is simply here for
35 * documentation purposes. It shows the interface that is used by the
36 * ISA to access and change CPU state.
37 */
38class ExecContext {
39 // The register accessor methods provide the index of the
40 // instruction's operand (e.g., 0 or 1), not the architectural
41 // register index, to simplify the implementation of register
42 // renaming. We find the architectural register index by indexing
43 // into the instruction's own operand index table. Note that a
44 // raw pointer to the StaticInst is provided instead of a
45 // ref-counted StaticInstPtr to reduce overhead. This is fine as
46 // long as these methods don't copy the pointer into any long-term
47 // storage (which is pretty hard to imagine they would have reason
48 // to do).
49
50 /** Reads an integer register. */
51 uint64_t readIntReg(const StaticInst *si, int idx);
52
53 /** Reads a floating point register of a specific width. */
54 FloatReg readFloatReg(const StaticInst *si, int idx, int width);
55
56 /** Reads a floating point register of single register width. */
57 FloatReg readFloatReg(const StaticInst *si, int idx);
58
59 /** Reads a floating point register of a specific width in its
60 * binary format, instead of by value. */
61 FloatRegBits readFloatRegBits(const StaticInst *si, int idx, int width);
62
63 /** Reads a floating point register in its binary format, instead
64 * of by value. */
65 FloatRegBits readFloatRegBits(const StaticInst *si, int idx);
66
67 /** Sets an integer register to a value. */
68 void setIntReg(const StaticInst *si, int idx, uint64_t val);
69
70 /** Sets a floating point register of a specific width to a value. */
71 void setFloatReg(const StaticInst *si, int idx, FloatReg val, int width);
72
73 /** Sets a floating point register of single width to a value. */
74 void setFloatReg(const StaticInst *si, int idx, FloatReg val);
75
76 /** Sets the bits of a floating point register of a specific width
77 * to a binary value. */
78 void setFloatRegBits(const StaticInst *si, int idx,
79 FloatRegBits val, int width);
80
81 /** Sets the bits of a floating point register of single width
82 * to a binary value. */
83 void setFloatRegBits(const StaticInst *si, int idx, FloatRegBits val);
84
85 /** Reads the PC. */
86 uint64_t readPC();
87 /** Reads the NextPC. */
88 uint64_t readNextPC();
89 /** Reads the Next-NextPC. Only for architectures like SPARC or MIPS. */
90 uint64_t readNextNPC();
91
92 /** Sets the PC. */
93 void setPC(uint64_t val);
94 /** Sets the NextPC. */
95 void setNextPC(uint64_t val);
96 /** Sets the Next-NextPC. Only for architectures like SPARC or MIPS. */
97 void setNextNPC(uint64_t val);
98
99 /** Reads a miscellaneous register. */
100 MiscReg readMiscReg(int misc_reg);
101
102 /** Reads a miscellaneous register, handling any architectural
103 * side effects due to reading that register. */
|
112
113 /** Records the effective address of the instruction. Only valid
114 * for memory ops. */
115 void setEA(Addr EA);
116 /** Returns the effective address of the instruction. Only valid
117 * for memory ops. */
118 Addr getEA();
119
120 /** Returns a pointer to the ThreadContext. */
121 ThreadContext *tcBase();
122
123 /** Reads an address, creating a memory request with the given
124 * flags. Stores result of read in data. */
125 template <class T>
126 Fault read(Addr addr, T &data, unsigned flags);
127
128 /** Writes to an address, creating a memory request with the given
129 * flags. Writes data to memory. For store conditionals, returns
130 * the result of the store in res. */
131 template <class T>
132 Fault write(T data, Addr addr, unsigned flags, uint64_t *res);
133
134 /** Prefetches an address, creating a memory request with the
135 * given flags. */
136 void prefetch(Addr addr, unsigned flags);
137
138 /** Hints to the memory system that an address will be written to
139 * soon, with the given size. Creates a memory request with the
140 * given flags. */
141 void writeHint(Addr addr, int size, unsigned flags);
142
143#if FULL_SYSTEM
144 /** Somewhat Alpha-specific function that handles returning from
145 * an error or interrupt. */
146 Fault hwrei();
147
148 /**
149 * Check for special simulator handling of specific PAL calls. If
150 * return value is false, actual PAL call will be suppressed.
151 */
152 bool simPalCheck(int palFunc);
153#else
154 /** Executes a syscall specified by the callnum. */
155 void syscall(int64_t callnum);
156#endif
157};
| 112
113 /** Records the effective address of the instruction. Only valid
114 * for memory ops. */
115 void setEA(Addr EA);
116 /** Returns the effective address of the instruction. Only valid
117 * for memory ops. */
118 Addr getEA();
119
120 /** Returns a pointer to the ThreadContext. */
121 ThreadContext *tcBase();
122
123 /** Reads an address, creating a memory request with the given
124 * flags. Stores result of read in data. */
125 template <class T>
126 Fault read(Addr addr, T &data, unsigned flags);
127
128 /** Writes to an address, creating a memory request with the given
129 * flags. Writes data to memory. For store conditionals, returns
130 * the result of the store in res. */
131 template <class T>
132 Fault write(T data, Addr addr, unsigned flags, uint64_t *res);
133
134 /** Prefetches an address, creating a memory request with the
135 * given flags. */
136 void prefetch(Addr addr, unsigned flags);
137
138 /** Hints to the memory system that an address will be written to
139 * soon, with the given size. Creates a memory request with the
140 * given flags. */
141 void writeHint(Addr addr, int size, unsigned flags);
142
143#if FULL_SYSTEM
144 /** Somewhat Alpha-specific function that handles returning from
145 * an error or interrupt. */
146 Fault hwrei();
147
148 /**
149 * Check for special simulator handling of specific PAL calls. If
150 * return value is false, actual PAL call will be suppressed.
151 */
152 bool simPalCheck(int palFunc);
153#else
154 /** Executes a syscall specified by the callnum. */
155 void syscall(int64_t callnum);
156#endif
157};
|