gic_v3_redistributor.hh revision 13531:e6f1bf55d038 
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#ifndef __DEV_ARM_GICV3_REDISTRIBUTOR_H__
32#define __DEV_ARM_GICV3_REDISTRIBUTOR_H__
33
34#include "base/addr_range.hh"
35#include "dev/arm/gic_v3.hh"
36#include "sim/serialize.hh"
37
38class Gicv3Distributor;
39class Gicv3CPUInterface;
40
41class Gicv3Redistributor : public Serializable
42{
43  private:
44
45    friend class Gicv3CPUInterface;
46    friend class Gicv3Distributor;
47
48  protected:
49
50    Gicv3 * gic;
51    Gicv3Distributor * distributor;
52    Gicv3CPUInterface * cpuInterface;
53    uint32_t cpuId;
54
55    /*
56     * GICv3 defines 2 contiguous 64KB frames for each redistributor.
57     * Order of frames must be RD_base, SGI_base.
58     */
59    static const uint32_t RD_base = 0x0;
60    static const uint32_t SGI_base = 0x10000;
61
62    enum {
63        // Control Register
64        GICR_CTLR  = RD_base + 0x0000,
65        // Implementer Identification Register
66        GICR_IIDR = RD_base + 0x0004,
67        // Type Register
68        GICR_TYPER = RD_base + 0x0008,
69        // Wake Register
70        GICR_WAKER = RD_base + 0x0014,
71        // Peripheral ID0 Register
72        GICR_PIDR0 = RD_base + 0xffe0,
73        // Peripheral ID1 Register
74        GICR_PIDR1 = RD_base + 0xffe4,
75        // Peripheral ID2 Register
76        GICR_PIDR2 = RD_base + 0xffe8,
77        // Peripheral ID3 Register
78        GICR_PIDR3 = RD_base + 0xffec,
79        // Peripheral ID4 Register
80        GICR_PIDR4 = RD_base + 0xffd0,
81        // Peripheral ID5 Register
82        GICR_PIDR5 = RD_base + 0xffd4,
83        // Peripheral ID6 Register
84        GICR_PIDR6 = RD_base + 0xffd8,
85        // Peripheral ID7 Register
86        GICR_PIDR7 = RD_base + 0xffdc,
87    };
88
89    static const uint32_t GICR_WAKER_ProcessorSleep = 1 << 1;
90    static const uint32_t GICR_WAKER_ChildrenAsleep = 1 << 2;
91
92    bool peInLowPowerState;
93
94    enum {
95        // Interrupt Group Register 0
96        GICR_IGROUPR0   = SGI_base + 0x0080,
97        // Interrupt Set-Enable Register 0
98        GICR_ISENABLER0 = SGI_base + 0x0100,
99        // Interrupt Clear-Enable Register 0
100        GICR_ICENABLER0 = SGI_base + 0x0180,
101        // Interrupt Set-Pending Register 0
102        GICR_ISPENDR0 = SGI_base + 0x0200,
103        // Interrupt Clear-Pending Register 0
104        GICR_ICPENDR0 = SGI_base + 0x0280,
105        // Interrupt Set-Active Register 0
106        GICR_ISACTIVER0 = SGI_base + 0x0300,
107        // Interrupt Clear-Active Register 0
108        GICR_ICACTIVER0 = SGI_base + 0x0380,
109        // SGI Configuration Register
110        GICR_ICFGR0 = SGI_base + 0x0c00,
111        // PPI Configuration Register
112        GICR_ICFGR1 = SGI_base + 0x0c04,
113        // Interrupt Group Modifier Register 0
114        GICR_IGRPMODR0 = SGI_base + 0x0d00,
115        // Non-secure Access Control Register
116        GICR_NSACR = SGI_base + 0x0e00,
117    };
118
119    // Interrupt Priority Registers
120    static const AddrRange GICR_IPRIORITYR;
121
122    std::vector <uint8_t> irqGroup;
123    std::vector <bool> irqEnabled;
124    std::vector <bool> irqPending;
125    std::vector <bool> irqActive;
126    std::vector <uint8_t> irqPriority;
127    std::vector <Gicv3::IntTriggerType> irqConfig;
128    std::vector <uint8_t> irqGrpmod;
129    std::vector <uint8_t> irqNsacr;
130
131    bool DPG1S;
132    bool DPG1NS;
133    bool DPG0;
134
135    static const uint32_t GICR_CTLR_DPG0 = 1 << 24;
136    static const uint32_t GICR_CTLR_DPG1NS = 1 << 25;
137    static const uint32_t GICR_CTLR_DPG1S = 1 << 26;
138
139  public:
140
141    /*
142     * GICv3 defines only 2 64K consecutive frames for the redistributor
143     * (RD_base and SGI_base) but we are using 2 extra 64K stride frames
144     * to match GICv4 that defines 4 64K consecutive frames for them.
145     * Note this must match with DTB/DTS GIC node definition and boot
146     * loader code.
147     */
148    static const uint32_t ADDR_RANGE_SIZE = 0x40000;
149
150    Gicv3Redistributor(Gicv3 * gic, uint32_t cpu_id);
151    ~Gicv3Redistributor();
152    void init();
153    void initState();
154
155    uint64_t read(Addr addr, size_t size, bool is_secure_access);
156    void write(Addr addr, uint64_t data, size_t size,
157               bool is_secure_access);
158    void sendPPInt(uint32_t int_id);
159    void sendSGI(uint32_t int_id, Gicv3::GroupId group, bool ns);
160    void serialize(CheckpointOut & cp) const override;
161    void unserialize(CheckpointIn & cp) override;
162    uint32_t getAffinity();
163
164    Gicv3CPUInterface *
165    getCPUInterface() const
166    {
167        return cpuInterface;
168    }
169
170    bool canBeSelectedFor1toNInterrupt(Gicv3::GroupId group);
171
172  protected:
173
174    void reset();
175    void update();
176    void updateAndInformCPUInterface();
177    Gicv3::IntStatus intStatus(uint32_t int_id);
178    Gicv3::GroupId getIntGroup(int int_id);
179    void activateIRQ(uint32_t int_id);
180    void deactivateIRQ(uint32_t int_id);
181};
182
183#endif //__DEV_ARM_GICV3_REDISTRIBUTOR_H__
184