7aa6460c48
The new RTC emulation supports all interrupt modes: periodic, update ended and alarm. It is also capable of maintaining the date/time and NVRAM contents across virtual machine reset. Also, the date/time fields can now be modified by the guest. Since bhyve now emulates both the PIT and the RTC there is no need for "Legacy Replacement Routing" in the HPET so get rid of it. The RTC device state can be inspected via bhyvectl as follows: bhyvectl --vm=vm --get-rtc-time bhyvectl --vm=vm --set-rtc-time=<unix_time_secs> bhyvectl --vm=vm --rtc-nvram-offset=<offset> --get-rtc-nvram bhyvectl --vm=vm --rtc-nvram-offset=<offset> --set-rtc-nvram=<value> Reviewed by: tychon Discussed with: grehan Differential Revision: https://reviews.freebsd.org/D1385 MFC after: 2 weeks
130 lines
3.4 KiB
C
130 lines
3.4 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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* XXX this always returns localtime to maintain compatibility with the
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* original device model.
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*/
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static time_t
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rtc_time(struct vmctx *ctx)
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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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localtime_r(&t, &tm);
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return (timegm(&tm));
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}
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void
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rtc_init(struct vmctx *ctx)
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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));
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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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