1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #include <sys/cdefs.h> 30 31 #include <sys/types.h> 32 33 #include <time.h> 34 #include <assert.h> 35 36 #include <machine/vmm.h> 37 #include <vmmapi.h> 38 39 #include "acpi.h" 40 #include "config.h" 41 #include "pci_lpc.h" 42 #include "rtc.h" 43 44 #define IO_RTC 0x70 45 46 #define RTC_LMEM_LSB 0x34 47 #define RTC_LMEM_MSB 0x35 48 #define RTC_HMEM_LSB 0x5b 49 #define RTC_HMEM_SB 0x5c 50 #define RTC_HMEM_MSB 0x5d 51 52 #define m_64KB (64*1024) 53 #define m_16MB (16*1024*1024) 54 #define m_4GB (4ULL*1024*1024*1024) 55 56 /* 57 * Returns the current RTC time as number of seconds since 00:00:00 Jan 1, 1970 58 */ 59 #ifdef __FreeBSD__ 60 static time_t 61 rtc_time(void) 62 { 63 struct tm tm; 64 time_t t; 65 66 time(&t); 67 if (get_config_bool_default("rtc.use_localtime", true)) { 68 localtime_r(&t, &tm); 69 t = timegm(&tm); 70 } 71 return (t); 72 } 73 #else /* __FreeBSD__ */ 74 static void 75 rtc_time(timespec_t *ts) 76 { 77 (void) clock_gettime(CLOCK_REALTIME, ts); 78 79 if (get_config_bool_default("rtc.use_localtime", true)) { 80 struct tm tm; 81 82 localtime_r(&ts->tv_sec, &tm); 83 ts->tv_sec = timegm(&tm); 84 } 85 } 86 #endif /* __FreeBSD__ */ 87 88 void 89 rtc_init(struct vmctx *ctx) 90 { 91 size_t himem; 92 size_t lomem; 93 int err; 94 95 /* XXX init diag/reset code/equipment/checksum ? */ 96 97 /* 98 * Report guest memory size in nvram cells as required by UEFI. 99 * Little-endian encoding. 100 * 0x34/0x35 - 64KB chunks above 16MB, below 4GB 101 * 0x5b/0x5c/0x5d - 64KB chunks above 4GB 102 */ 103 lomem = (vm_get_lowmem_size(ctx) - m_16MB) / m_64KB; 104 err = vm_rtc_write(ctx, RTC_LMEM_LSB, lomem); 105 assert(err == 0); 106 err = vm_rtc_write(ctx, RTC_LMEM_MSB, lomem >> 8); 107 assert(err == 0); 108 109 himem = vm_get_highmem_size(ctx) / m_64KB; 110 err = vm_rtc_write(ctx, RTC_HMEM_LSB, himem); 111 assert(err == 0); 112 err = vm_rtc_write(ctx, RTC_HMEM_SB, himem >> 8); 113 assert(err == 0); 114 err = vm_rtc_write(ctx, RTC_HMEM_MSB, himem >> 16); 115 assert(err == 0); 116 117 #ifdef __FreeBSD__ 118 err = vm_rtc_settime(ctx, rtc_time()); 119 #else 120 timespec_t ts; 121 122 rtc_time(&ts); 123 err = vm_rtc_settime(ctx, &ts); 124 #endif 125 assert(err == 0); 126 } 127 128 static void 129 rtc_dsdt(void) 130 { 131 132 dsdt_line(""); 133 dsdt_line("Device (RTC)"); 134 dsdt_line("{"); 135 dsdt_line(" Name (_HID, EisaId (\"PNP0B00\"))"); 136 dsdt_line(" Name (_CRS, ResourceTemplate ()"); 137 dsdt_line(" {"); 138 dsdt_indent(2); 139 dsdt_fixed_ioport(IO_RTC, 2); 140 dsdt_fixed_irq(8); 141 dsdt_unindent(2); 142 dsdt_line(" })"); 143 dsdt_line("}"); 144 } 145 LPC_DSDT(rtc_dsdt); 146 147 /* 148 * Reserve the extended RTC I/O ports although they are not emulated at this 149 * time. 150 */ 151 SYSRES_IO(0x72, 6); 152