gic_v3.cc revision 13756:12aa26df8c2f
1/*
2 * Copyright (c) 2018 Metempsy Technology Consulting
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: Jairo Balart
29 */
30
31#include "dev/arm/gic_v3.hh"
32
33#include "cpu/intr_control.hh"
34#include "debug/GIC.hh"
35#include "debug/Interrupt.hh"
36#include "dev/arm/gic_v3_cpu_interface.hh"
37#include "dev/arm/gic_v3_distributor.hh"
38#include "dev/arm/gic_v3_redistributor.hh"
39#include "dev/platform.hh"
40#include "mem/packet.hh"
41#include "mem/packet_access.hh"
42
43Gicv3::Gicv3(const Params * p)
44    : BaseGic(p)
45{
46}
47
48void
49Gicv3::init()
50{
51    distRange = RangeSize(params()->dist_addr,
52                          Gicv3Distributor::ADDR_RANGE_SIZE - 1);
53    redistRange = RangeSize(params()->redist_addr,
54        Gicv3Redistributor::ADDR_RANGE_SIZE * sys->numContexts() - 1);
55    addrRanges = {distRange, redistRange};
56    BaseGic::init();
57    distributor = new Gicv3Distributor(this, params()->it_lines);
58    redistributors.resize(sys->numContexts(), nullptr);
59    cpuInterfaces.resize(sys->numContexts(), nullptr);
60
61    for (int i = 0; i < sys->numContexts(); i++) {
62        redistributors[i] = new Gicv3Redistributor(this, i);
63        cpuInterfaces[i] = new Gicv3CPUInterface(this, i);
64    }
65
66    distributor->init();
67
68    for (int i = 0; i < sys->numContexts(); i++) {
69        redistributors[i]->init();
70        cpuInterfaces[i]->init();
71    }
72}
73
74void
75Gicv3::initState()
76{
77    distributor->initState();
78
79    for (int i = 0; i < sys->numContexts(); i++) {
80        redistributors[i]->initState();
81        cpuInterfaces[i]->initState();
82    }
83}
84
85Tick
86Gicv3::read(PacketPtr pkt)
87{
88    const Addr addr = pkt->getAddr();
89    const size_t size = pkt->getSize();
90    bool is_secure_access = pkt->isSecure();
91    uint64_t resp = 0;
92    Tick delay = 0;
93
94    if (distRange.contains(addr)) {
95        const Addr daddr = addr - distRange.start();
96        panic_if(!distributor, "Distributor is null!");
97        resp = distributor->read(daddr, size, is_secure_access);
98        delay = params()->dist_pio_delay;
99        DPRINTF(GIC, "Gicv3::read(): (distributor) context_id %d register %#x "
100                "size %d is_secure_access %d (value %#x)\n",
101                pkt->req->contextId(), daddr, size, is_secure_access, resp);
102    } else if (redistRange.contains(addr)) {
103        Addr daddr = addr - redistRange.start();
104        uint32_t redistributor_id =
105            daddr / Gicv3Redistributor::ADDR_RANGE_SIZE;
106        daddr = daddr % Gicv3Redistributor::ADDR_RANGE_SIZE;
107        panic_if(redistributor_id >= redistributors.size(),
108                 "Invalid redistributor_id!");
109        panic_if(!redistributors[redistributor_id], "Redistributor is null!");
110        resp = redistributors[redistributor_id]->read(daddr, size,
111                                                      is_secure_access);
112        delay = params()->redist_pio_delay;
113        DPRINTF(GIC, "Gicv3::read(): (redistributor %d) context_id %d "
114                "register %#x size %d is_secure_access %d (value %#x)\n",
115                redistributor_id, pkt->req->contextId(), daddr, size,
116                is_secure_access, resp);
117    } else {
118        panic("Gicv3::read(): unknown address %#x\n", addr);
119    }
120
121    pkt->setUintX(resp, LittleEndianByteOrder);
122    pkt->makeAtomicResponse();
123    return delay;
124}
125
126Tick
127Gicv3::write(PacketPtr pkt)
128{
129    const size_t size = pkt->getSize();
130    uint64_t data = pkt->getUintX(LittleEndianByteOrder);
131    const Addr addr = pkt->getAddr();
132    bool is_secure_access = pkt->isSecure();
133    Tick delay = 0;
134
135    if (distRange.contains(addr)) {
136        const Addr daddr = addr - distRange.start();
137        panic_if(!distributor, "Distributor is null!");
138        DPRINTF(GIC, "Gicv3::write(): (distributor) context_id %d "
139                "register %#x size %d is_secure_access %d value %#x\n",
140                pkt->req->contextId(), daddr, size, is_secure_access, data);
141        distributor->write(daddr, data, size, is_secure_access);
142        delay = params()->dist_pio_delay;
143    } else if (redistRange.contains(addr)) {
144        Addr daddr = addr - redistRange.start();
145        uint32_t redistributor_id =
146            daddr / Gicv3Redistributor::ADDR_RANGE_SIZE;
147        daddr = daddr % Gicv3Redistributor::ADDR_RANGE_SIZE;
148        panic_if(redistributor_id >= redistributors.size(),
149                 "Invalid redistributor_id!");
150        panic_if(!redistributors[redistributor_id], "Redistributor is null!");
151        DPRINTF(GIC, "Gicv3::write(): (redistributor %d) context_id %d "
152                "register %#x size %d is_secure_access %d value %#x\n",
153                redistributor_id, pkt->req->contextId(), daddr, size,
154                is_secure_access, data);
155        redistributors[redistributor_id]->write(daddr, data, size,
156                                                is_secure_access);
157        delay = params()->redist_pio_delay;
158    } else {
159        panic("Gicv3::write(): unknown address %#x\n", addr);
160    }
161
162    pkt->makeAtomicResponse();
163    return delay;
164}
165
166void
167Gicv3::sendInt(uint32_t int_id)
168{
169    panic_if(int_id < Gicv3::SGI_MAX + Gicv3::PPI_MAX, "Invalid SPI!");
170    panic_if(int_id >= Gicv3::INTID_SECURE, "Invalid SPI!");
171    DPRINTF(Interrupt, "Gicv3::sendInt(): received SPI %d\n", int_id);
172    distributor->sendInt(int_id);
173}
174
175void
176Gicv3::clearInt(uint32_t number)
177{
178    distributor->deassertSPI(number);
179}
180
181void
182Gicv3::sendPPInt(uint32_t int_id, uint32_t cpu)
183{
184    panic_if(cpu >= redistributors.size(), "Invalid cpuID sending PPI!");
185    panic_if(int_id < Gicv3::SGI_MAX, "Invalid PPI!");
186    panic_if(int_id >= Gicv3::SGI_MAX + Gicv3::PPI_MAX, "Invalid PPI!");
187    DPRINTF(Interrupt, "Gicv3::sendPPInt(): received PPI %d cpuTarget %#x\n",
188            int_id, cpu);
189    redistributors[cpu]->sendPPInt(int_id);
190}
191
192void
193Gicv3::clearPPInt(uint32_t num, uint32_t cpu)
194{
195}
196
197void
198Gicv3::postInt(uint32_t cpu, ArmISA::InterruptTypes int_type)
199{
200    platform->intrctrl->post(cpu, int_type, 0);
201}
202
203void
204Gicv3::deassertInt(uint32_t cpu, ArmISA::InterruptTypes int_type)
205{
206    platform->intrctrl->clear(cpu, int_type, 0);
207}
208
209Gicv3Redistributor *
210Gicv3::getRedistributorByAffinity(uint32_t affinity) const
211{
212    for (auto & redistributor : redistributors) {
213        if (redistributor->getAffinity() == affinity) {
214            return redistributor;
215        }
216    }
217
218    return nullptr;
219}
220
221void
222Gicv3::serialize(CheckpointOut & cp) const
223{
224    distributor->serializeSection(cp, "distributor");
225
226    for (uint32_t redistributor_id = 0;
227         redistributor_id < redistributors.size(); redistributor_id++)
228        redistributors[redistributor_id]->serializeSection(cp,
229            csprintf("redistributors.%i", redistributor_id));
230
231    for (uint32_t cpu_interface_id = 0;
232         cpu_interface_id < cpuInterfaces.size(); cpu_interface_id++)
233        cpuInterfaces[cpu_interface_id]->serializeSection(cp,
234            csprintf("cpuInterface.%i", cpu_interface_id));
235}
236
237void
238Gicv3::unserialize(CheckpointIn & cp)
239{
240    getSystem()->setGIC(this);
241
242    distributor->unserializeSection(cp, "distributor");
243
244    for (uint32_t redistributor_id = 0;
245         redistributor_id < redistributors.size(); redistributor_id++)
246        redistributors[redistributor_id]->unserializeSection(cp,
247            csprintf("redistributors.%i", redistributor_id));
248
249    for (uint32_t cpu_interface_id = 0;
250         cpu_interface_id < cpuInterfaces.size(); cpu_interface_id++)
251        cpuInterfaces[cpu_interface_id]->unserializeSection(cp,
252            csprintf("cpuInterface.%i", cpu_interface_id));
253}
254
255Gicv3 *
256Gicv3Params::create()
257{
258    return new Gicv3(this);
259}
260