Implement RTC CMOS nvram. Init some fields that are used
by FreeBSD and UEFI. Tested with nvram(4). Reviewed by: neel
This commit is contained in:
Peter Grehan
parent
3f80cc03fd
commit
9d6be09f8a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=253181
@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$");
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#include "xmsr.h"
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#include "ioapic.h"
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#include "spinup_ap.h"
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#include "rtc.h"
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#define DEFAULT_GUEST_HZ 100
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#define DEFAULT_GUEST_TSLICE 200
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@ -735,6 +736,8 @@ main(int argc, char *argv[])
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init_mem();
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init_inout();
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rtc_init(ctx);
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/*
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* Exit if a device emulation finds an error in it's initilization
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*/
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@ -33,10 +33,15 @@ __FBSDID("$FreeBSD$");
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#include <sys/time.h>
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#include <stdio.h>
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#include <string.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 "inout.h"
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#include "rtc.h"
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#define IO_RTC 0x70
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@ -64,16 +69,30 @@ __FBSDID("$FreeBSD$");
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#define RTC_STATUSD 0x0d /* status register D (R) Lost Power */
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#define RTCSD_PWR 0x80 /* clock power OK */
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#define RTC_NVRAM_START 0x0e
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#define RTC_NVRAM_END 0x7f
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#define RTC_NVRAM_SZ (128 - RTC_NVRAM_START)
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#define nvoff(x) ((x) - RTC_NVRAM_START)
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#define RTC_DIAG 0x0e
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#define RTC_RSTCODE 0x0f
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#define RTC_EQUIPMENT 0x14
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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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static int addr;
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static uint8_t rtc_nvram[RTC_NVRAM_SZ];
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/* XXX initialize these to default values as they would be from BIOS */
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static uint8_t status_a, status_b, rstcode;
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static uint8_t status_a, status_b;
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static u_char const bin2bcd_data[] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
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@ -135,14 +154,11 @@ rtc_addr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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case RTC_DAY:
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case RTC_MONTH:
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case RTC_YEAR:
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case RTC_CENTURY:
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case RTC_STATUSA:
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case RTC_STATUSB:
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case RTC_INTR:
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case RTC_STATUSD:
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case RTC_DIAG:
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case RTC_RSTCODE:
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case RTC_EQUIPMENT:
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case RTC_NVRAM_START ... RTC_NVRAM_END:
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break;
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default:
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return (-1);
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@ -217,9 +233,6 @@ rtc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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case RTC_YEAR:
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*eax = rtcout(tm.tm_year % 100);
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return (0);
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case RTC_CENTURY:
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*eax = rtcout(tm.tm_year / 100);
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break;
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case RTC_STATUSA:
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*eax = status_a;
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return (0);
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@ -232,14 +245,8 @@ rtc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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case RTC_STATUSD:
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*eax = RTCSD_PWR;
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return (0);
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case RTC_DIAG:
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*eax = 0;
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return (0);
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case RTC_RSTCODE:
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*eax = rstcode;
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return (0);
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case RTC_EQUIPMENT:
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*eax = 0;
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case RTC_NVRAM_START ... RTC_NVRAM_END:
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*eax = rtc_nvram[addr - RTC_NVRAM_START];
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return (0);
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default:
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return (-1);
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@ -259,9 +266,6 @@ rtc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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case RTC_STATUSD:
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/* ignore write */
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break;
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case RTC_RSTCODE:
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rstcode = *eax;
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break;
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case RTC_SEC:
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case RTC_MIN:
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case RTC_HRS:
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@ -269,16 +273,58 @@ rtc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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case RTC_DAY:
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case RTC_MONTH:
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case RTC_YEAR:
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case RTC_CENTURY:
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/*
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* Ignore writes to the time of day registers
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*/
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break;
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case RTC_NVRAM_START ... RTC_NVRAM_END:
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rtc_nvram[addr - RTC_NVRAM_START] = *eax;
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break;
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default:
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return (-1);
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}
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return (0);
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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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struct timeval cur;
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struct tm tm;
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size_t himem;
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size_t lomem;
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int err;
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err = gettimeofday(&cur, NULL);
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assert(err == 0);
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(void) localtime_r(&cur.tv_sec, &tm);
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memset(rtc_nvram, 0, sizeof(rtc_nvram));
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rtc_nvram[nvoff(RTC_CENTURY)] = rtcout(tm.tm_year / 100);
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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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err = vm_get_memory_seg(ctx, 0, &lomem);
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assert(err == 0);
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lomem = (lomem - m_16MB) / m_64KB;
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rtc_nvram[nvoff(RTC_LMEM_LSB)] = lomem;
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rtc_nvram[nvoff(RTC_LMEM_MSB)] = lomem >> 8;
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if (vm_get_memory_seg(ctx, m_4GB, &himem) == 0) {
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himem /= m_64KB;
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rtc_nvram[nvoff(RTC_HMEM_LSB)] = himem;
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rtc_nvram[nvoff(RTC_HMEM_SB)] = himem >> 8;
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rtc_nvram[nvoff(RTC_NVRAM_START)] = himem >> 16;
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}
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}
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INOUT_PORT(rtc, IO_RTC, IOPORT_F_INOUT, rtc_addr_handler);
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INOUT_PORT(rtc, IO_RTC + 1, IOPORT_F_INOUT, rtc_data_handler);
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34
usr.sbin/bhyve/rtc.h
Normal file
34
usr.sbin/bhyve/rtc.h
Normal file
@ -0,0 +1,34 @@
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/*
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* Copyright (c) 2013 Peter Grehan <grehan@freebsd.org>
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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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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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#ifndef _RTC_H_
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#define _RTC_H_
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void rtc_init(struct vmctx *ctx);
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#endif /* _RTC_H_ */
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