2 * Copyright (c) 2006 The Regents of The University of Michigan
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
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14 * this software without specific prior written permission.
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
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Steve Reinhardt
32 #ifndef __ARCH_ALPHA_INTERRUPT_HH__
33 #define __ARCH_ALPHA_INTERRUPT_HH__
35 #include "arch/alpha/faults.hh"
36 #include "arch/alpha/isa_traits.hh"
37 #include "base/compiler.hh"
38 #include "base/trace.hh"
39 #include "cpu/thread_context.hh"
40 #include "params/AlphaInterrupts.hh"
41 #include "sim/sim_object.hh"
45 class Interrupts : public SimObject
54 uint64_t interrupts[NumInterruptLevels];
58 typedef AlphaInterruptsParams Params;
63 return dynamic_cast<const Params *>(_params);
66 Interrupts(Params * p) : SimObject(p), cpu(NULL)
68 memset(interrupts, 0, sizeof(interrupts));
74 setCPU(BaseCPU * _cpu)
80 post(int int_num, int index)
82 DPRINTF(Interrupt, "Interrupt %d:%d posted\n", int_num, index);
84 if (int_num < 0 || int_num >= NumInterruptLevels)
85 panic("int_num out of bounds\n");
87 if (index < 0 || index >= (int)sizeof(uint64_t) * 8)
88 panic("int_num out of bounds\n");
90 interrupts[int_num] |= 1 << index;
91 intstatus |= (ULL(1) << int_num);
95 clear(int int_num, int index)
97 DPRINTF(Interrupt, "Interrupt %d:%d cleared\n", int_num, index);
99 if (int_num < 0 || int_num >= NumInterruptLevels)
100 panic("int_num out of bounds\n");
102 if (index < 0 || index >= (int)sizeof(uint64_t) * 8)
103 panic("int_num out of bounds\n");
105 interrupts[int_num] &= ~(1 << index);
106 if (interrupts[int_num] == 0)
107 intstatus &= ~(ULL(1) << int_num);
113 DPRINTF(Interrupt, "Interrupts all cleared\n");
115 memset(interrupts, 0, sizeof(interrupts));
120 serialize(std::ostream &os)
122 SERIALIZE_ARRAY(interrupts, NumInterruptLevels);
123 SERIALIZE_SCALAR(intstatus);
127 unserialize(Checkpoint *cp, const std::string §ion)
129 UNSERIALIZE_ARRAY(interrupts, NumInterruptLevels);
130 UNSERIALIZE_SCALAR(intstatus);
134 checkInterrupts(ThreadContext *tc) const
136 return (intstatus != 0) && !(tc->readPC() & 0x3);
140 getInterrupt(ThreadContext *tc)
143 uint64_t summary = 0;
145 if (tc->readMiscRegNoEffect(IPR_ASTRR))
146 panic("asynchronous traps not implemented\n");
148 if (tc->readMiscRegNoEffect(IPR_SIRR)) {
149 for (uint64_t i = INTLEVEL_SOFTWARE_MIN;
150 i < INTLEVEL_SOFTWARE_MAX; i++) {
151 if (tc->readMiscRegNoEffect(IPR_SIRR) & (ULL(1) << i)) {
152 // See table 4-19 of 21164 hardware reference
153 ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1;
154 summary |= (ULL(1) << i);
159 uint64_t interrupts = intstatus;
161 for (uint64_t i = INTLEVEL_EXTERNAL_MIN;
162 i < INTLEVEL_EXTERNAL_MAX; i++) {
163 if (interrupts & (ULL(1) << i)) {
164 // See table 4-19 of 21164 hardware reference
166 summary |= (ULL(1) << i);
171 if (ipl && ipl > tc->readMiscRegNoEffect(IPR_IPLR)) {
173 newSummary = summary;
175 DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n",
176 tc->readMiscRegNoEffect(IPR_IPLR), ipl, summary);
178 return new InterruptFault;
185 updateIntrInfo(ThreadContext *tc)
188 tc->setMiscRegNoEffect(IPR_ISR, newSummary);
189 tc->setMiscRegNoEffect(IPR_INTID, newIpl);
194 } // namespace AlphaISA
196 #endif // __ARCH_ALPHA_INTERRUPT_HH__