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Ported over the VARCem NVR commit.

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OBattler
2018-03-13 03:46:10 +01:00
parent 4ca7abf6fe
commit ddcb901421
22 changed files with 4206 additions and 2397 deletions
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218
src/nvr.h
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@@ -1,119 +1,99 @@
/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Definitions for a defacto-standard RTC/NVRAM device.
*
* Version: @(#)nvr.h 1.0.5 2017/11/22
*
* Authors: Miran Grca, <mgrca8@gmail.com>
* Mahod,
* Fred N. van Kempen, <decwiz@yahoo.com>
*
* Copyright 2016-2017 Miran Grca.
* Copyright 2016-2017 Mahod.
* Copyright 2017 Fred N. van Kempen.
*/
#ifndef EMU_NVR_H
# define EMU_NVR_H
/* Conversion from BCD to Binary and vice versa. */
#define RTC_BCD(x) (((x) % 10) | (((x) / 10) << 4))
#define RTC_DCB(x) ((((x) & 0xf0) >> 4) * 10 + ((x) & 0x0f))
/* RTC registers and bit definitions. */
#define RTC_SECONDS 0
#define RTC_ALSECONDS 1
#define RTC_MINUTES 2
#define RTC_ALMINUTES 3
#define RTC_HOURS 4
# define RTC_AMPM 0x80 /* PM flag if 12h format in use */
#define RTC_ALHOURS 5
#define RTC_DOW 6
#define RTC_DOM 7
#define RTC_MONTH 8
#define RTC_YEAR 9
#define RTC_REGA 10
# define REGA_UIP 0x80
# define REGA_DV2 0x40
# define REGA_DV1 0x20
# define REGA_DV0 0x10
# define REGA_DV 0x70
# define REGA_RS3 0x08
# define REGA_RS2 0x04
# define REGA_RS1 0x02
# define REGA_RS0 0x01
# define REGA_RS 0x0f
#define RTC_REGB 11
# define REGB_SET 0x80
# define REGB_PIE 0x40
# define REGB_AIE 0x20
# define REGB_UIE 0x10
# define REGB_SQWE 0x08
# define REGB_DM 0x04
# define REGB_2412 0x02
# define REGB_DSE 0x01
#define RTC_REGC 12
# define REGC_IRQF 0x80
# define REGC_PF 0x40
# define REGC_AF 0x20
# define REGC_UF 0x10
#define RTC_REGD 13
# define REGD_VRT 0x80
#define RTC_CENTURY 0x32 /* century register */
#define RTC_REGS 14 /* number of registers */
/* Define a (defacto-standard) RTC/NVRAM chip. */
typedef struct _nvr_ {
uint8_t regs[RTC_REGS+114]; /* these are the registers */
int64_t mask,
irq,
addr;
wchar_t *fname;
int64_t upd_stat,
upd_ecount,
onesec_time,
onesec_cnt,
rtctime,
oldmachine;
/* Hooks to internal RTC I/O functions. */
void (*set)(struct _nvr_ *, uint16_t, uint8_t);
uint8_t (*get)(struct _nvr_ *, uint16_t);
/* Hooks to alternative load/save functions. */
int8_t (*load)(wchar_t *fname);
int8_t (*save)(wchar_t *fname);
/* Hook to RTC ticker handler. */
void (*hook)(struct _nvr_ *);
} nvr_t;
extern int enable_sync;
extern int nvr_dosave;
extern void nvr_init(nvr_t *);
extern int nvr_load(void);
extern int nvr_save(void);
extern void nvr_recalc(void);
extern wchar_t *nvr_path(wchar_t *str);
extern FILE *nvr_fopen(wchar_t *str, wchar_t *mode);
extern void nvr_at_init(int64_t irq);
extern void nvr_at_close(void);
#endif /*EMU_NVR_H*/
/*
* VARCem Virtual ARchaeological Computer EMulator.
* An emulator of (mostly) x86-based PC systems and devices,
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
* spanning the era between 1981 and 1995.
*
* This file is part of the VARCem Project.
*
* Definitions for the generic NVRAM/CMOS driver.
*
* Version: @(#)nvr.h 1.0.2 2018/03/11
*
* Author: Fred N. van Kempen, <decwiz@yahoo.com>
*
* Copyright 2017,2018 Fred N. van Kempen.
*
* 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 entire
* above 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.
*
* 3. Neither the name of the copyright holder nor the names
* of its contributors may be used to endorse or promote
* products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* HOLDER 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.
*/
#ifndef EMU_NVR_H
# define EMU_NVR_H
#define NVR_MAXSIZE 128 /* max size of NVR data */
/* Conversion from BCD to Binary and vice versa. */
#define RTC_BCD(x) (((x) % 10) | (((x) / 10) << 4))
#define RTC_DCB(x) ((((x) & 0xf0) >> 4) * 10 + ((x) & 0x0f))
#define RTC_BCDINC(x,y) RTC_BCD(RTC_DCB(x) + y)
/* Define a generic RTC/NVRAM device. */
typedef struct _nvr_ {
uint8_t regs[NVR_MAXSIZE]; /* these are the registers */
wchar_t *fn;
/* pathname of image file */
uint16_t size;
/* device configuration */
int8_t irq;
int8_t upd_stat, /* FIXME: move to private struct */
addr;
int64_t upd_ecount, /* FIXME: move to private struct */
onesec_time,
onesec_cnt,
rtctime;
/* Hooks to device functions. */
void (*reset)(struct _nvr_ *);
void (*start)(struct _nvr_ *);
void (*tick)(struct _nvr_ *);
} nvr_t;
extern int nvr_dosave;
extern void nvr_init(nvr_t *);
extern int nvr_load(void);
extern int nvr_save(void);
extern int nvr_is_leap(int year);
extern int nvr_get_days(int month, int year);
extern void nvr_time_get(struct tm *);
extern void nvr_time_set(struct tm *);
extern wchar_t *nvr_path(wchar_t *str);
extern FILE *nvr_fopen(wchar_t *str, wchar_t *mode);
extern void nvr_at_init(int irq);
extern void nvr_at_close(void);