1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/types.h> 35 36 #include <time.h> 37 #include <assert.h> 38 39 #include <machine/vmm.h> 40 #include <vmmapi.h> 41 42 #include "acpi.h" 43 #include "config.h" 44 #include "pci_lpc.h" 45 #include "rtc.h" 46 47 #define IO_RTC 0x70 48 49 #define RTC_LMEM_LSB 0x34 50 #define RTC_LMEM_MSB 0x35 51 #define RTC_HMEM_LSB 0x5b 52 #define RTC_HMEM_SB 0x5c 53 #define RTC_HMEM_MSB 0x5d 54 55 #define m_64KB (64*1024) 56 #define m_16MB (16*1024*1024) 57 #define m_4GB (4ULL*1024*1024*1024) 58 59 /* 60 * Returns the current RTC time as number of seconds since 00:00:00 Jan 1, 1970 61 */ 62 #ifdef __FreeBSD__ 63 static time_t 64 rtc_time(void) 65 { 66 struct tm tm; 67 time_t t; 68 69 time(&t); 70 if (get_config_bool_default("rtc.use_localtime", true)) { 71 localtime_r(&t, &tm); 72 t = timegm(&tm); 73 } 74 return (t); 75 } 76 #else /* __FreeBSD__ */ 77 static void 78 rtc_time(timespec_t *ts) 79 { 80 (void) clock_gettime(CLOCK_REALTIME, ts); 81 82 if (get_config_bool_default("rtc.use_localtime", true)) { 83 struct tm tm; 84 85 localtime_r(&ts->tv_sec, &tm); 86 ts->tv_sec = timegm(&tm); 87 } 88 } 89 #endif /* __FreeBSD__ */ 90 91 void 92 rtc_init(struct vmctx *ctx) 93 { 94 size_t himem; 95 size_t lomem; 96 int err; 97 98 /* XXX init diag/reset code/equipment/checksum ? */ 99 100 /* 101 * Report guest memory size in nvram cells as required by UEFI. 102 * Little-endian encoding. 103 * 0x34/0x35 - 64KB chunks above 16MB, below 4GB 104 * 0x5b/0x5c/0x5d - 64KB chunks above 4GB 105 */ 106 lomem = (vm_get_lowmem_size(ctx) - m_16MB) / m_64KB; 107 err = vm_rtc_write(ctx, RTC_LMEM_LSB, lomem); 108 assert(err == 0); 109 err = vm_rtc_write(ctx, RTC_LMEM_MSB, lomem >> 8); 110 assert(err == 0); 111 112 himem = vm_get_highmem_size(ctx) / m_64KB; 113 err = vm_rtc_write(ctx, RTC_HMEM_LSB, himem); 114 assert(err == 0); 115 err = vm_rtc_write(ctx, RTC_HMEM_SB, himem >> 8); 116 assert(err == 0); 117 err = vm_rtc_write(ctx, RTC_HMEM_MSB, himem >> 16); 118 assert(err == 0); 119 120 #ifdef __FreeBSD__ 121 err = vm_rtc_settime(ctx, rtc_time()); 122 #else 123 timespec_t ts; 124 125 rtc_time(&ts); 126 err = vm_rtc_settime(ctx, &ts); 127 #endif 128 assert(err == 0); 129 } 130 131 static void 132 rtc_dsdt(void) 133 { 134 135 dsdt_line(""); 136 dsdt_line("Device (RTC)"); 137 dsdt_line("{"); 138 dsdt_line(" Name (_HID, EisaId (\"PNP0B00\"))"); 139 dsdt_line(" Name (_CRS, ResourceTemplate ()"); 140 dsdt_line(" {"); 141 dsdt_indent(2); 142 dsdt_fixed_ioport(IO_RTC, 2); 143 dsdt_fixed_irq(8); 144 dsdt_unindent(2); 145 dsdt_line(" })"); 146 dsdt_line("}"); 147 } 148 LPC_DSDT(rtc_dsdt); 149 150 /* 151 * Reserve the extended RTC I/O ports although they are not emulated at this 152 * time. 153 */ 154 SYSRES_IO(0x72, 6); 155