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c974767896
The default remains localtime for compatibility with the original device model in bhyve(8). This is required for OpenBSD guests which assume that the RTC keeps UTC time. Reviewed by: grehan Pointed out by: Jason Tubnor (jason@tubnor.net) MFC after: 2 weeks
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <time.h>
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#include <assert.h>
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#include <machine/vmm.h>
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#include <vmmapi.h>
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#include "acpi.h"
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#include "pci_lpc.h"
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#include "rtc.h"
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#define IO_RTC 0x70
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#define RTC_LMEM_LSB 0x34
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#define RTC_LMEM_MSB 0x35
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#define RTC_HMEM_LSB 0x5b
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#define RTC_HMEM_SB 0x5c
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#define RTC_HMEM_MSB 0x5d
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#define m_64KB (64*1024)
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#define m_16MB (16*1024*1024)
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#define m_4GB (4ULL*1024*1024*1024)
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/*
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* Returns the current RTC time as number of seconds since 00:00:00 Jan 1, 1970
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*/
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static time_t
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rtc_time(struct vmctx *ctx, int use_localtime)
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{
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struct tm tm;
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time_t t;
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time(&t);
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if (use_localtime) {
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localtime_r(&t, &tm);
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t = timegm(&tm);
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}
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return (t);
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}
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void
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rtc_init(struct vmctx *ctx, int use_localtime)
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{
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size_t himem;
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size_t lomem;
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int err;
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/* XXX init diag/reset code/equipment/checksum ? */
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/*
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* Report guest memory size in nvram cells as required by UEFI.
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* Little-endian encoding.
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* 0x34/0x35 - 64KB chunks above 16MB, below 4GB
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* 0x5b/0x5c/0x5d - 64KB chunks above 4GB
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*/
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lomem = (vm_get_lowmem_size(ctx) - m_16MB) / m_64KB;
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err = vm_rtc_write(ctx, RTC_LMEM_LSB, lomem);
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assert(err == 0);
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err = vm_rtc_write(ctx, RTC_LMEM_MSB, lomem >> 8);
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assert(err == 0);
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himem = vm_get_highmem_size(ctx) / m_64KB;
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err = vm_rtc_write(ctx, RTC_HMEM_LSB, himem);
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assert(err == 0);
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err = vm_rtc_write(ctx, RTC_HMEM_SB, himem >> 8);
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assert(err == 0);
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err = vm_rtc_write(ctx, RTC_HMEM_MSB, himem >> 16);
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assert(err == 0);
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err = vm_rtc_settime(ctx, rtc_time(ctx, use_localtime));
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assert(err == 0);
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}
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static void
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rtc_dsdt(void)
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{
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dsdt_line("");
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dsdt_line("Device (RTC)");
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dsdt_line("{");
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dsdt_line(" Name (_HID, EisaId (\"PNP0B00\"))");
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dsdt_line(" Name (_CRS, ResourceTemplate ()");
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dsdt_line(" {");
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dsdt_indent(2);
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dsdt_fixed_ioport(IO_RTC, 2);
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dsdt_fixed_irq(8);
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dsdt_unindent(2);
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dsdt_line(" })");
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dsdt_line("}");
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}
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LPC_DSDT(rtc_dsdt);
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/*
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* Reserve the extended RTC I/O ports although they are not emulated at this
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* time.
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*/
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SYSRES_IO(0x72, 6);
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