1/*
2 * Copyright (c) 2006 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;

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

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: Ali Saidi
29 */
30
31#include "arch/sparc/regfile.hh"
31#include "arch/sparc/miscregfile.hh"
32#include "base/bitfield.hh"
33#include "base/trace.hh"
34#include "cpu/base.hh"
35#include "cpu/thread_context.hh"
36
33Fault
34SparcISA::MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
37using namespace SparcISA;
38
39void
40MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
41 ThreadContext *tc)
42{
43 int64_t time;
38 SparcSystem *sys;
44 int oldLevel, newLevel;
45 switch (miscReg) {
46 /* Full system only ASRs */
47 case MISCREG_SOFTINT:
42 if (isNonPriv())
43 return new PrivilegedOpcode;
48 // Check if we are going to interrupt because of something
45 int oldLevel = InterruptLevel(softint);
46 int newLevel = InterruptLevel(val);
49 oldLevel = InterruptLevel(softint);
50 newLevel = InterruptLevel(val);
51 setReg(miscReg, val);
52 if (newLevel > oldLevel)
53 ; // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
54 //tc->getCpuPtr()->checkInterrupts = true;
51 return NoFault;
55 panic("SOFTINT not implemented\n");
56 break;
57
58 case MISCREG_SOFTINT_CLR:
59 return setRegWithEffect(miscReg, ~val & softint, tc);
60 case MISCREG_SOFTINT_SET:
61 return setRegWithEffect(miscReg, val | softint, tc);
62
63 case MISCREG_TICK_CMPR:
59 if (isNonPriv())
60 return new PrivilegedOpcode;
64 if (tickCompare == NULL)
65 tickCompare = new TickCompareEvent(this, tc);
66 setReg(miscReg, val);
64 if (tick_cmprFields.int_dis && tickCompare.scheduled())
65 tickCompare.deschedule();
66 time = tick_cmprFields.tick_cmpr - tickFields.counter;
67 if (!tick_cmprFields.int_dis && time > 0)
68 tickCompare.schedule(time * tc->getCpuPtr()->cycles(1));
69 return NoFault;
67 if ((tick_cmpr & mask(63)) && tickCompare->scheduled())
68 tickCompare->deschedule();
69 time = (tick_cmpr & mask(63)) - (tick & mask(63));
70 if (!(tick_cmpr & ~mask(63)) && time > 0)
71 tickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
72 break;
73
71 case MISCREG_STICK:
72 if (isNonPriv())
73 return new PrivilegedOpcode;
74 if (isPriv())
75 return new PrivilegedAction;
76 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
77 assert(sys != NULL);
78 sys->sysTick = curTick/Clock::Int::ns - val & ~Bit64;
79 stickFields.npt = val & Bit64 ? 1 : 0;
80 return NoFault;
81
74 case MISCREG_STICK_CMPR:
83 if (isNonPriv())
84 return new PrivilegedOpcode;
75 if (sTickCompare == NULL)
76 sTickCompare = new STickCompareEvent(this, tc);
87 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
88 assert(sys != NULL);
77 setReg(miscReg, val);
90 if (stick_cmprFields.int_dis && sTickCompare.scheduled())
91 sTickCompare.deschedule();
92 time = stick_cmprFields.tick_cmpr - sys->sysTick;
93 if (!stick_cmprFields.int_dis && time > 0)
94 sTickCompare.schedule(time * Clock::Int::ns);
95 return NoFault;
78 if ((stick_cmpr & mask(63)) && sTickCompare->scheduled())
79 sTickCompare->deschedule();
80 time = (stick_cmpr & mask(63)) - (stick & mask(63));
81 if (!(stick_cmpr & ~mask(63)) && time > 0)
82 sTickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
83 break;
84
97 /* Fullsystem only Priv registers. */
85 case MISCREG_PIL:
99 if (FULL_SYSTEM) {
100 setReg(miscReg, val);
101 //tc->getCpuPtr()->checkInterrupts;
102 // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
103 return NoFault;
104 } else
105 panic("PIL not implemented for syscall emulation\n");
106
107 /* Hyper privileged registers */
108 case MISCREG_HPSTATE:
109 case MISCREG_HINTP:
86 setReg(miscReg, val);
111 return NoFault;
112 case MISCREG_HTSTATE:
113 if (tl == 0)
114 return new IllegalInstruction;
115 setReg(miscReg, val);
116 return NoFault;
87 //tc->getCpuPtr()->checkInterrupts;
88 // MUST DO SOMETHING HERE TO TELL CPU TO LOOK FOR INTERRUPTS XXX
89 panic("PIL not implemented\n");
90 break;
91
92 case MISCREG_HVER:
93 panic("Shouldn't be writing HVER\n");
94
95 case MISCREG_HTBA:
96 // clear lower 7 bits on writes.
97 setReg(miscReg, val & ULL(~0x7FFF));
121 return NoFault;
98 break;
99
123 case MISCREG_STRAND_STS_REG:
124 setReg(miscReg, strandStatusReg);
125 return NoFault;
100 case MISCREG_HSTICK_CMPR:
127 if (isNonPriv())
128 return new PrivilegedOpcode;
101 if (hSTickCompare == NULL)
102 hSTickCompare = new HSTickCompareEvent(this, tc);
131 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
132 assert(sys != NULL);
103 setReg(miscReg, val);
134 if (hstick_cmprFields.int_dis && hSTickCompare.scheduled())
135 hSTickCompare.deschedule();
136 int64_t time = hstick_cmprFields.tick_cmpr - sys->sysTick;
137 if (!hstick_cmprFields.int_dis && time > 0)
138 hSTickCompare.schedule(time * Clock::Int::ns);
139 return NoFault;
104 if ((hstick_cmpr & mask(63)) && hSTickCompare->scheduled())
105 hSTickCompare->deschedule();
106 time = (hstick_cmpr & mask(63)) - (stick & mask(63));
107 if (!(hstick_cmpr & ~mask(63)) && time > 0)
108 hSTickCompare->schedule(time * tc->getCpuPtr()->cycles(1));
109 break;
110
111 case MISCREG_HPSTATE:
112 case MISCREG_HTSTATE:
113 case MISCREG_STRAND_STS_REG:
114 setReg(miscReg, val);
115 break;
116
117 default:
141 return new IllegalInstruction;
118 panic("Invalid write to FS misc register\n");
119 }
120}
121
122MiscReg
146MiscRegFile::readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext * tc)
123MiscRegFile::readFSRegWithEffect(int miscReg, ThreadContext * tc)
124{
125 switch (miscReg) {
126
127 /* Privileged registers. */
128 case MISCREG_SOFTINT:
152 if (isNonPriv()) {
153 fault = new PrivilegedOpcode;
154 return 0;
155 }
156 return readReg(miscReg);
129 case MISCREG_TICK_CMPR:
158 if (isNonPriv()) {
159 fault = new PrivilegedOpcode;
160 return 0;
161 }
162 return readReg(miscReg);
163 case MISCREG_STICK:
164 SparcSystem *sys;
165 if (stickFields.npt && !isNonPriv()) {
166 fault = new PrivilegedAction;
167 return 0;
168 }
169 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
170 assert(sys != NULL);
171 return curTick/Clock::Int::ns - sys->sysTick | stickFields.npt << 63;
130 case MISCREG_STICK_CMPR:
173 if (isNonPriv()) {
174 fault = new PrivilegedOpcode;
175 return 0;
176 }
177 return readReg(miscReg);
178
179
180 /* Hyper privileged registers */
131 case MISCREG_PIL:
132 case MISCREG_HPSTATE:
133 case MISCREG_HINTP:
183 return readReg(miscReg);
134 case MISCREG_HTSTATE:
185 if (tl == 0) {
186 fault = new IllegalInstruction;
187 return 0;
188 }
189 return readReg(miscReg);
135 case MISCREG_STRAND_STS_REG:
136 case MISCREG_HSTICK_CMPR:
137 return readReg(miscReg) ;
138
139 case MISCREG_HTBA:
140 return readReg(miscReg) & ULL(~0x7FFF);
141 case MISCREG_HVER:
142 return NWindows | MaxTL << 8 | MaxGL << 16;
195 case MISCREG_STRAND_STS_REG:
196 return strandStatusReg;
197 case MISCREG_HSTICK_CMPR:
198 return hstick_cmpr;
143
144 default:
201 fault = new IllegalInstruction;
202 return 0;
145 panic("Invalid read to FS misc register\n");
146 }
147}
148/*
149 In Niagra STICK==TICK so this isn't needed
150 case MISCREG_STICK:
151 SparcSystem *sys;
152 sys = dynamic_cast<SparcSystem*>(tc->getSystemPtr());
153 assert(sys != NULL);
154 return curTick/Clock::Int::ns - sys->sysTick | (stick & ~(mask(63)));
155*/
156
157
158
159void
160MiscRegFile::processTickCompare(ThreadContext *tc)
161{
162 panic("tick compare not implemented\n");
163}
164
165void
166MiscRegFile::processSTickCompare(ThreadContext *tc)
167{
168 panic("tick compare not implemented\n");
169}
170
171void
172MiscRegFile::processHSTickCompare(ThreadContext *tc)
173{
174 panic("tick compare not implemented\n");
175}
176
224}; // namespace SparcISA