1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2021 Andrew Turner 5 * 6 * This work was supported by Innovate UK project 105694, "Digital Security 7 * by Design (DSbD) Technology Platform Prototype". 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <efi.h> 35 #include <efilib.h> 36 37 #include <time.h> 38 #include <sys/time.h> 39 40 #include <machine/armreg.h> 41 42 static uint64_t timer_freq; 43 44 void 45 efi_time_init(void) 46 { 47 /* Find the timer frequency */ 48 timer_freq = READ_SPECIALREG(cntfrq_el0); 49 } 50 51 void 52 efi_time_fini(void) 53 { 54 } 55 56 time_t 57 time(time_t *tloc) 58 { 59 time_t t; 60 61 t = READ_SPECIALREG(cntvct_el0) / timer_freq; 62 if (tloc != NULL) 63 *tloc = t; 64 65 return (t); 66 } 67 68 time_t 69 getsecs(void) 70 { 71 return time(NULL); 72 } 73