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Diffstat (limited to 'usr/src/cmd/bhyve/rtc.c')
| -rw-r--r-- | usr/src/cmd/bhyve/rtc.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/usr/src/cmd/bhyve/rtc.c b/usr/src/cmd/bhyve/rtc.c new file mode 100644 index 0000000000..09ca3f61ae --- /dev/null +++ b/usr/src/cmd/bhyve/rtc.c @@ -0,0 +1,131 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> + +#include <time.h> +#include <assert.h> + +#include <machine/vmm.h> +#include <vmmapi.h> + +#include "acpi.h" +#include "pci_lpc.h" +#include "rtc.h" + +#define IO_RTC 0x70 + +#define RTC_LMEM_LSB 0x34 +#define RTC_LMEM_MSB 0x35 +#define RTC_HMEM_LSB 0x5b +#define RTC_HMEM_SB 0x5c +#define RTC_HMEM_MSB 0x5d + +#define m_64KB (64*1024) +#define m_16MB (16*1024*1024) +#define m_4GB (4ULL*1024*1024*1024) + +/* + * Returns the current RTC time as number of seconds since 00:00:00 Jan 1, 1970 + */ +static time_t +rtc_time(struct vmctx *ctx, int use_localtime) +{ + struct tm tm; + time_t t; + + time(&t); + if (use_localtime) { + localtime_r(&t, &tm); + t = timegm(&tm); + } + return (t); +} + +void +rtc_init(struct vmctx *ctx, int use_localtime) +{ + size_t himem; + size_t lomem; + int err; + + /* XXX init diag/reset code/equipment/checksum ? */ + + /* + * Report guest memory size in nvram cells as required by UEFI. + * Little-endian encoding. + * 0x34/0x35 - 64KB chunks above 16MB, below 4GB + * 0x5b/0x5c/0x5d - 64KB chunks above 4GB + */ + lomem = (vm_get_lowmem_size(ctx) - m_16MB) / m_64KB; + err = vm_rtc_write(ctx, RTC_LMEM_LSB, lomem); + assert(err == 0); + err = vm_rtc_write(ctx, RTC_LMEM_MSB, lomem >> 8); + assert(err == 0); + + himem = vm_get_highmem_size(ctx) / m_64KB; + err = vm_rtc_write(ctx, RTC_HMEM_LSB, himem); + assert(err == 0); + err = vm_rtc_write(ctx, RTC_HMEM_SB, himem >> 8); + assert(err == 0); + err = vm_rtc_write(ctx, RTC_HMEM_MSB, himem >> 16); + assert(err == 0); + + err = vm_rtc_settime(ctx, rtc_time(ctx, use_localtime)); + assert(err == 0); +} + +static void +rtc_dsdt(void) +{ + + dsdt_line(""); + dsdt_line("Device (RTC)"); + dsdt_line("{"); + dsdt_line(" Name (_HID, EisaId (\"PNP0B00\"))"); + dsdt_line(" Name (_CRS, ResourceTemplate ()"); + dsdt_line(" {"); + dsdt_indent(2); + dsdt_fixed_ioport(IO_RTC, 2); + dsdt_fixed_irq(8); + dsdt_unindent(2); + dsdt_line(" })"); + dsdt_line("}"); +} +LPC_DSDT(rtc_dsdt); + +/* + * Reserve the extended RTC I/O ports although they are not emulated at this + * time. + */ +SYSRES_IO(0x72, 6); |