1 /* 2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator 3 * 4 * RTAS Real Time Clock 5 * 6 * Copyright (c) 2010-2011 David Gibson, IBM Corporation. 7 * Copyright 2014 David Gibson, Red Hat. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a copy 10 * of this software and associated documentation files (the "Software"), to deal 11 * in the Software without restriction, including without limitation the rights 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 13 * copies of the Software, and to permit persons to whom the Software is 14 * furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 25 * THE SOFTWARE. 26 * 27 */ 28 #include "cpu.h" 29 #include "hw/ppc/spapr.h" 30 #include "qapi-event.h" 31 32 static void rtas_get_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr, 33 uint32_t token, uint32_t nargs, 34 target_ulong args, 35 uint32_t nret, target_ulong rets) 36 { 37 struct tm tm; 38 39 if ((nargs != 0) || (nret != 8)) { 40 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 41 return; 42 } 43 44 qemu_get_timedate(&tm, spapr->rtc_offset); 45 46 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 47 rtas_st(rets, 1, tm.tm_year + 1900); 48 rtas_st(rets, 2, tm.tm_mon + 1); 49 rtas_st(rets, 3, tm.tm_mday); 50 rtas_st(rets, 4, tm.tm_hour); 51 rtas_st(rets, 5, tm.tm_min); 52 rtas_st(rets, 6, tm.tm_sec); 53 rtas_st(rets, 7, 0); /* we don't do nanoseconds */ 54 } 55 56 static void rtas_set_time_of_day(PowerPCCPU *cpu, sPAPREnvironment *spapr, 57 uint32_t token, uint32_t nargs, 58 target_ulong args, 59 uint32_t nret, target_ulong rets) 60 { 61 struct tm tm; 62 63 if ((nargs != 7) || (nret != 1)) { 64 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); 65 return; 66 } 67 68 tm.tm_year = rtas_ld(args, 0) - 1900; 69 tm.tm_mon = rtas_ld(args, 1) - 1; 70 tm.tm_mday = rtas_ld(args, 2); 71 tm.tm_hour = rtas_ld(args, 3); 72 tm.tm_min = rtas_ld(args, 4); 73 tm.tm_sec = rtas_ld(args, 5); 74 75 /* Just generate a monitor event for the change */ 76 qapi_event_send_rtc_change(qemu_timedate_diff(&tm), &error_abort); 77 spapr->rtc_offset = qemu_timedate_diff(&tm); 78 79 rtas_st(rets, 0, RTAS_OUT_SUCCESS); 80 } 81 82 void spapr_rtc_init(void) 83 { 84 spapr_rtas_register(RTAS_GET_TIME_OF_DAY, "get-time-of-day", 85 rtas_get_time_of_day); 86 spapr_rtas_register(RTAS_SET_TIME_OF_DAY, "set-time-of-day", 87 rtas_set_time_of_day); 88 } 89