1 /** 2 * Copyright © 2017 IBM Corporation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include <phosphor-logging/log.hpp> 17 #include "cfam_access.hpp" 18 #include "p9_cfam.hpp" 19 #include "registration.hpp" 20 #include "targeting.hpp" 21 22 namespace openpower 23 { 24 namespace p9 25 { 26 27 using namespace phosphor::logging; 28 using namespace openpower::cfam::access; 29 using namespace openpower::cfam::p9; 30 using namespace openpower::targeting; 31 32 33 /** 34 * @brief Starts the self boot engine on P9 position 0 to kick off a boot. 35 * @return void 36 */ 37 void startHost() 38 { 39 Targeting targets; 40 const auto& master = *(targets.begin()); 41 42 log<level::INFO>("Running P9 procedure startHost", 43 entry("NUM_PROCS=%d", targets.size())); 44 45 //Ensure asynchronous clock mode is set 46 writeReg(master, P9_LL_MODE_REG, 0x00000001); 47 48 //Clock mux select override 49 for (const auto& t : targets) 50 { 51 writeRegWithMask(t, P9_ROOT_CTRL8, 52 0x0000000C, 0x0000000C); 53 } 54 55 //Enable P9 checkstop to be reported to the BMC 56 57 //Setup FSI2PIB to report checkstop 58 writeReg(master, P9_FSI_A_SI1S, 0x20000000); 59 60 //Enable Xstop/ATTN interrupt 61 writeReg(master, P9_FSI2PIB_TRUE_MASK, 0x60000000); 62 63 //Arm it 64 writeReg(master, P9_FSI2PIB_INTERRUPT, 0xFFFFFFFF); 65 66 //Kick off the SBE to start the boot 67 68 //First ensure ISTEP stepping isn't enabled 69 writeReg(master, P9_SCRATCH_REGISTER_8, 0x20000000); 70 71 //Start the SBE 72 writeRegWithMask(master, P9_CBS_CS, 0x80000000, 0x80000000); 73 } 74 75 REGISTER_PROCEDURE("startHost", startHost); 76 77 } 78 } 79 80