usr.sbin/bhyve/rtc.c

/* $MidnightBSD$ */
/*-
 * 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: stable/10/usr.sbin/bhyve/rtc.c 284894 2015-06-27 22:48:22Z neel $
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: stable/10/usr.sbin/bhyve/rtc.c 284894 2015-06-27 22:48:22Z neel $");

#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);
Revision:	10719
Committed:	Sat Jun 9 21:54:00 2018 UTC (5 years, 10 months ago) by laffer1
Content type:	text/plain
File size:	3580 byte(s)
Log Message:	add bhyve
#	Content
1	/* $MidnightBSD$ */
2	/*-
3	* Copyright (c) 2011 NetApp, Inc.
4	* All rights reserved.
5	*
6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions
8	* are met:
9	* 1. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	* 2. Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.
14	*
15	* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18	* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25	* SUCH DAMAGE.
26	*
27	* $FreeBSD: stable/10/usr.sbin/bhyve/rtc.c 284894 2015-06-27 22:48:22Z neel $
28	*/
29
30	#include <sys/cdefs.h>
31	__FBSDID("$FreeBSD: stable/10/usr.sbin/bhyve/rtc.c 284894 2015-06-27 22:48:22Z neel $");
32
33	#include <sys/types.h>
34
35	#include <time.h>
36	#include <assert.h>
37
38	#include <machine/vmm.h>
39	#include <vmmapi.h>
40
41	#include "acpi.h"
42	#include "pci_lpc.h"
43	#include "rtc.h"
44
45	#define IO_RTC 0x70
46
47	#define RTC_LMEM_LSB 0x34
48	#define RTC_LMEM_MSB 0x35
49	#define RTC_HMEM_LSB 0x5b
50	#define RTC_HMEM_SB 0x5c
51	#define RTC_HMEM_MSB 0x5d
52
53	#define m_64KB (64*1024)
54	#define m_16MB (1610241024)
55	#define m_4GB (4ULL10241024*1024)
56
57	/*
58	* Returns the current RTC time as number of seconds since 00:00:00 Jan 1, 1970
59	*/
60	static time_t
61	rtc_time(struct vmctx *ctx, int use_localtime)
62	{
63	struct tm tm;
64	time_t t;
65
66	time(&t);
67	if (use_localtime) {
68	localtime_r(&t, &tm);
69	t = timegm(&tm);
70	}
71	return (t);
72	}
73
74	void
75	rtc_init(struct vmctx *ctx, int use_localtime)
76	{
77	size_t himem;
78	size_t lomem;
79	int err;
80
81	/* XXX init diag/reset code/equipment/checksum ? */
82
83	/*
84	* Report guest memory size in nvram cells as required by UEFI.
85	* Little-endian encoding.
86	* 0x34/0x35 - 64KB chunks above 16MB, below 4GB
87	* 0x5b/0x5c/0x5d - 64KB chunks above 4GB
88	*/
89	lomem = (vm_get_lowmem_size(ctx) - m_16MB) / m_64KB;
90	err = vm_rtc_write(ctx, RTC_LMEM_LSB, lomem);
91	assert(err == 0);
92	err = vm_rtc_write(ctx, RTC_LMEM_MSB, lomem >> 8);
93	assert(err == 0);
94
95	himem = vm_get_highmem_size(ctx) / m_64KB;
96	err = vm_rtc_write(ctx, RTC_HMEM_LSB, himem);
97	assert(err == 0);
98	err = vm_rtc_write(ctx, RTC_HMEM_SB, himem >> 8);
99	assert(err == 0);
100	err = vm_rtc_write(ctx, RTC_HMEM_MSB, himem >> 16);
101	assert(err == 0);
102
103	err = vm_rtc_settime(ctx, rtc_time(ctx, use_localtime));
104	assert(err == 0);
105	}
106
107	static void
108	rtc_dsdt(void)
109	{
110
111	dsdt_line("");
112	dsdt_line("Device (RTC)");
113	dsdt_line("{");
114	dsdt_line(" Name (_HID, EisaId (\"PNP0B00\"))");
115	dsdt_line(" Name (_CRS, ResourceTemplate ()");
116	dsdt_line(" {");
117	dsdt_indent(2);
118	dsdt_fixed_ioport(IO_RTC, 2);
119	dsdt_fixed_irq(8);
120	dsdt_unindent(2);
121	dsdt_line(" })");
122	dsdt_line("}");
123	}
124	LPC_DSDT(rtc_dsdt);
125
126	/*
127	* Reserve the extended RTC I/O ports although they are not emulated at this
128	* time.
129	*/
130	SYSRES_IO(0x72, 6);
Name	Value
svn:eol-style	native
svn:keywords	MidnightBSD=%H
svn:mime-type	text/plain