1/* 2 * Copyright (c) 2013, 2018-2019 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Stan Czerniawski 38 */ 39 40#include "dev/arm/smmu_v3_cmdexec.hh" 41 42#include "base/bitfield.hh" 43#include "dev/arm/smmu_v3.hh" 44 45void 46SMMUCommandExecProcess::main(Yield &yield) 47{ 48 SMMUAction a; 49 a.type = ACTION_INITIAL_NOP; 50 a.pkt = NULL; 51 a.ifc = nullptr; 52 a.delay = 0; 53 yield(a); 54 55 while (true) { 56 busy = true; 57 58 while (true) {
| 1/* 2 * Copyright (c) 2013, 2018-2019 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Stan Czerniawski 38 */ 39 40#include "dev/arm/smmu_v3_cmdexec.hh" 41 42#include "base/bitfield.hh" 43#include "dev/arm/smmu_v3.hh" 44 45void 46SMMUCommandExecProcess::main(Yield &yield) 47{ 48 SMMUAction a; 49 a.type = ACTION_INITIAL_NOP; 50 a.pkt = NULL; 51 a.ifc = nullptr; 52 a.delay = 0; 53 yield(a); 54 55 while (true) { 56 busy = true; 57 58 while (true) {
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59 int sizeMask = mask(smmu.regs.cmdq_base & Q_BASE_SIZE_MASK);
| 59 // Masking depending on CMDQ_BASE.LOG2SIZE (log(number of 60 // queue entries)). Example: a value of 0b101 (32 entries) 61 // generates a 0b11111 mask. 62 int size_mask = mask( 63 smmu.regs.cmdq_base & Q_BASE_SIZE_MASK);
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60
| 64
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61 if ((smmu.regs.cmdq_cons & sizeMask) == 62 (smmu.regs.cmdq_prod & sizeMask))
| 65 // In this case the wrap bit is considered (+1) 66 int size_mask_wrap = mask( 67 (smmu.regs.cmdq_base & Q_BASE_SIZE_MASK) + 1); 68 69 if ((smmu.regs.cmdq_cons & size_mask_wrap) == 70 (smmu.regs.cmdq_prod & size_mask_wrap))
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63 break; // command queue empty 64
| 71 break; // command queue empty 72
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65 Addr cmdAddr =
| 73 Addr cmd_addr =
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66 (smmu.regs.cmdq_base & Q_BASE_ADDR_MASK) +
| 74 (smmu.regs.cmdq_base & Q_BASE_ADDR_MASK) +
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67 (smmu.regs.cmdq_cons & sizeMask) * sizeof(SMMUCommand);
| 75 (smmu.regs.cmdq_cons & size_mask) * sizeof(SMMUCommand);
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68 69 // This deliberately resets the error field in cmdq_cons!
| 76 77 // This deliberately resets the error field in cmdq_cons!
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70 smmu.regs.cmdq_cons = (smmu.regs.cmdq_cons + 1) & sizeMask;
| 78 smmu.regs.cmdq_cons = (smmu.regs.cmdq_cons + 1) & size_mask_wrap;
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71
| 79
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72 doRead(yield, cmdAddr, &cmd, sizeof(SMMUCommand));
| 80 doRead(yield, cmd_addr, &cmd, sizeof(SMMUCommand));
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73 smmu.processCommand(cmd); 74 } 75 76 busy = false; 77 // No more commands to process, signal the SMMU as drained 78 smmu.signalDrainDone(); 79 80 doSleep(yield); 81 } 82}
| 81 smmu.processCommand(cmd); 82 } 83 84 busy = false; 85 // No more commands to process, signal the SMMU as drained 86 smmu.signalDrainDone(); 87 88 doSleep(yield); 89 } 90}
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