1/*
2 * Copyright (c) 2016 RISC-V Foundation
3 * Copyright (c) 2016 The University of Virginia
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright

--- 18 unchanged lines hidden (view full) ---

27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Alec Roelke
30 */
31#include "arch/riscv/isa.hh"
32
33#include <ctime>
34#include <set>
35
36#include "arch/riscv/registers.hh"
37#include "base/bitfield.hh"
38#include "cpu/base.hh"
39#include "debug/RiscvMisc.hh"
40#include "params/RiscvISA.hh"
41#include "sim/core.hh"
42#include "sim/pseudo_inst.hh"
43
44namespace RiscvISA
45{
46
47std::map<int, std::string> ISA::miscRegNames = {
48 {MISCREG_FFLAGS, "fflags"},
49 {MISCREG_FRM, "frm"},
50 {MISCREG_FCSR, "fcsr"},
51 {MISCREG_CYCLE, "cycle"},
52 {MISCREG_TIME, "time"},
53 {MISCREG_INSTRET, "instret"},
54 {MISCREG_CYCLEH, "cycleh"},
55 {MISCREG_TIMEH, "timeh"},
56 {MISCREG_INSTRETH, "instreth"},
57
58 {MISCREG_SSTATUS, "sstatus"},
59 {MISCREG_STVEC, "stvec"},
60 {MISCREG_SIE, "sie"},
61 {MISCREG_STIMECMP, "stimecmp"},
62 {MISCREG_STIME, "stime"},
63 {MISCREG_STIMEH, "stimeh"},
64 {MISCREG_SSCRATCH, "sscratch"},
65 {MISCREG_SEPC, "sepc"},
66 {MISCREG_SCAUSE, "scause"},
67 {MISCREG_SBADADDR, "sbadaddr"},
68 {MISCREG_SIP, "sip"},
69 {MISCREG_SPTBR, "sptbr"},
70 {MISCREG_SASID, "sasid"},
71 {MISCREG_CYCLEW, "cyclew"},
72 {MISCREG_TIMEW, "timew"},
73 {MISCREG_INSTRETW, "instretw"},
74 {MISCREG_CYCLEHW, "cyclehw"},
75 {MISCREG_TIMEHW, "timehw"},
76 {MISCREG_INSTRETHW, "instrethw"},
77
78 {MISCREG_HSTATUS, "hstatus"},
79 {MISCREG_HTVEC, "htvec"},
80 {MISCREG_HTDELEG, "htdeleg"},
81 {MISCREG_HTIMECMP, "htimecmp"},
82 {MISCREG_HTIME, "htime"},
83 {MISCREG_HTIMEH, "htimeh"},
84 {MISCREG_HSCRATCH, "hscratch"},
85 {MISCREG_HEPC, "hepc"},
86 {MISCREG_HCAUSE, "hcause"},
87 {MISCREG_HBADADDR, "hbadaddr"},
88 {MISCREG_STIMEW, "stimew"},
89 {MISCREG_STIMEHW, "stimehw"},
90
91 {MISCREG_MCPUID, "mcpuid"},
92 {MISCREG_MIMPID, "mimpid"},
93 {MISCREG_MHARTID, "mhartid"},
94 {MISCREG_MSTATUS, "mstatus"},
95 {MISCREG_MTVEC, "mtvec"},
96 {MISCREG_MTDELEG, "mtdeleg"},
97 {MISCREG_MIE, "mie"},
98 {MISCREG_MTIMECMP, "mtimecmp"},
99 {MISCREG_MTIME, "mtime"},
100 {MISCREG_MTIMEH, "mtimeh"},
101 {MISCREG_MSCRATCH, "mscratch"},
102 {MISCREG_MEPC, "mepc"},
103 {MISCREG_MCAUSE, "mcause"},
104 {MISCREG_MBADADDR, "mbadaddr"},
105 {MISCREG_MIP, "mip"},
106 {MISCREG_MBASE, "mbase"},
107 {MISCREG_MBOUND, "mbound"},
108 {MISCREG_MIBASE, "mibase"},
109 {MISCREG_MIBOUND, "mibound"},
110 {MISCREG_MDBASE, "mdbase"},
111 {MISCREG_MDBOUND, "mdbound"},
112 {MISCREG_HTIMEW, "htimew"},
113 {MISCREG_HTIMEHW, "htimehw"},
114 {MISCREG_MTOHOST, "mtohost"},
115 {MISCREG_MFROMHOST, "mfromhost"}
116};
117
118ISA::ISA(Params *p) : SimObject(p)
119{
120 miscRegFile.resize(NumMiscRegs);
121 clear();
122}
123
124const RiscvISAParams *
125ISA::params() const
126{
127 return dynamic_cast<const Params *>(_params);
128}
129
130void ISA::clear()
131{
132 std::fill(miscRegFile.begin(), miscRegFile.end(), 0);
133}
134
135
136MiscReg
137ISA::readMiscRegNoEffect(int misc_reg) const
138{
139 DPRINTF(RiscvMisc, "Reading CSR %s (0x%016llx).\n", miscRegNames[misc_reg],
140 miscRegFile[misc_reg]);
141 switch (misc_reg) {
142 case MISCREG_FFLAGS:
143 return bits(miscRegFile[MISCREG_FCSR], 4, 0);
144 case MISCREG_FRM:
145 return bits(miscRegFile[MISCREG_FCSR], 7, 5);
146 case MISCREG_FCSR:
147 return bits(miscRegFile[MISCREG_FCSR], 31, 0);
148 case MISCREG_CYCLE:

--- 7 unchanged lines hidden (view full) ---

156 case MISCREG_CYCLEH:
157 warn("Use readMiscReg to read the cycleh CSR.");
158 return 0;
159 case MISCREG_TIMEH:
160 return std::time(nullptr) >> 32;
161 case MISCREG_INSTRETH:
162 warn("Use readMiscReg to read the instreth CSR.");
163 return 0;
164 default:
165 return miscRegFile[misc_reg];
166 }
167}
168
169MiscReg
170ISA::readMiscReg(int misc_reg, ThreadContext *tc)
171{

--- 9 unchanged lines hidden (view full) ---

181 case MISCREG_INSTRETH:
182 DPRINTF(RiscvMisc, "Reading CSR %s (0x%016llx).\n",
183 miscRegNames[misc_reg], miscRegFile[misc_reg]);
184 return tc->getCpuPtr()->totalInsts() >> 32;
185 case MISCREG_CYCLEH:
186 DPRINTF(RiscvMisc, "Reading CSR %s (0x%016llx).\n",
187 miscRegNames[misc_reg], miscRegFile[misc_reg]);
188 return tc->getCpuPtr()->curCycle() >> 32;
189 default:
190 return readMiscRegNoEffect(misc_reg);
191 }
192}
193
194void
195ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
196{
197 DPRINTF(RiscvMisc, "Setting CSR %s to 0x%016llx.\n",
198 miscRegNames[misc_reg], miscRegNames[misc_reg], val);
199 switch (misc_reg) {
200 case MISCREG_FFLAGS:
201 miscRegFile[MISCREG_FCSR] &= ~0x1F;
202 miscRegFile[MISCREG_FCSR] |= bits(val, 4, 0);
203 break;
204 case MISCREG_FRM:
205 miscRegFile[MISCREG_FCSR] &= ~0x70;
206 miscRegFile[MISCREG_FCSR] |= bits(val, 2, 0) << 5;

--- 27 unchanged lines hidden ---