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/*-
* 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);
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