87c3e3452f
I’ve always wanted to have the option to have simulated devices behave
more naturally with respect to I/O operations. By more naturally I
mean that the current simulator model I/O is either polled (for asynchronous
things link Muxes and Network), or it is performed in the middle of some
instruction execution taking possibly many milliseconds (disk and/or tapes).
The existing model creates quite deterministic behavior which helps to debug
and understand issues, but it trades off potential instruction execution
while performing these I/O operations in between instruction execution.
To address this concept (while still retaining the potential advantages of
the original model), I’ve designed an Asynch I/O model extension for simh.
In order to flesh-out and debug this design, I’ve also refactored several
devices to utilize this capability. Please read the attached
0readmeAsynchIO.txt file for concept details about the approach.
In order to make disk devices easy to implement (within or without the
AsynchIO framework), I’ve created a sim_disk.c library which is modeled
on the sim_tape.c library to generalize disk I/O like tape I/O is
generalized in sim_tape.c. This sim_disk.c library now provides that
natural place to implement support for various disk implementation formats
(just like sim_tape support several formats, and one day will be the place
to add direct physical tape access). The current sim_disk library provides
the framework for direct support of 3 different disk formats:
1) standard simh disk format
2) platform specific physical disk access
and 3) platform independent Virtual Disk format.
The Virtual Disk format is an implementation of the format described in
the ”Microsoft Virtual Hard Disk (VHD) Image Format Specification”. The
VHD specification is available for anyone to implement under the "Microsoft
Open Specification Promise" described at
http://www.microsoft.com/interop/osp/default.mspx.
The VHD implementation includes support for:
1) Fixed sized disks
2) Dynamically expanding disks
and 3) Differencing Disks.
Dynamically expanding disks don’t change their “Virtual Size”, but they
don’t consume disk space on the containing storage until the virtual
sectors in the disk are actually written to (i.e. an RA81 or RA92 VHD
with a VMS installed on it may initially only contain 30+ MB of files,
and the resulting VHD will be 30+ MB). The VHD format contains meta data
which describes the virtual device. Amongst this meta data is the simh
device type which the VHD was originally created as. This metadata is
therefore available whenever that VHD is attached to an emulated disk
device in the future so the device type & size can be automatically be
configured.
Sim_disk_attach is used by device emulations to attach a simh/vhd/raw
device to a simulated device. The following simh command switches
are used by the sim_disk_attach API:
-R Attach Read Only.
-E Must Exist (if not specified an attempt to create the
indicated virtual disk will be attempted).
-F Open the indicated disk container in a specific format
(default is to autodetect VHD defaulting to simh if the
indicated container is not a VHD).
-X When creating a VHD, create a fixed sized VHD (vs a
Dynamically expanding one).
-C Create a VHD and copy its contents from another disk
(simh, VHD, or RAW format).
-D Create a Differencing VHD (relative to an already
existing VHD disk)
Examples:
sim> show rq
RQ, address=20001468-2000146B*, no vector, 4 units
RQ0, 159MB, not attached, write enabled, RD54, autosize, SIMH format
RQ1, 159MB, not attached, write enabled, RD54, autosize, SIMH format
RQ2, 159MB, not attached, write enabled, RD54, autosize, SIMH format
RQ3, 409KB, not attached, write enabled, RX50, autosize, SIMH format
sim> atta rq0 RA81.vhd
sim> show rq0
RQ0, 456MB, attached to RA81.vhd, write enabled, RA81, autosize, VHD format
sim> set rq2 ra92
sim> att rq2 -f vhd RA92.vhd
RQ2: creating new file
sim> sho rq2
RQ2, 1505MB, attached to RA92.vhd, write enabled, RA92, autosize, VHD format
sim> ! dir RA92.vhd
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
04/14/2011 12:57 PM 5,120 RA92.vhd
1 File(s) 5,120 bytes
0 Dir(s) 3,074,412,544 bytes free
sim> atta rq3 -c RA92-1.vhd RA92.vhd
sim> atta rq3 -c RA92-1.vhd RA92.vhd
RQ3: creating new virtual disk 'RA92-1.vhd'
RQ3: Copied 1505MB. 99% complete.
RQ3: Copied 1505MB. Done.
sim> sh rq3
RQ3, 1505MB, attached to RA92-1.vhd, write enabled, RA92, autosize, VHD format
sim> ! dir RA92*
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
04/14/2011 01:12 PM 5,120 RA92-1.vhd
04/14/2011 12:58 PM 5,120 RA92.vhd
2 File(s) 10,240 bytes
0 Dir(s) 3,074,404,352 bytes free
sim> sho rq2
RQ2, 1505MB, not attached, write enabled, RA92, autosize, VHD format
sim> set rq2 ra81
sim> set rq2 noauto
sim> sho rq2
RQ2, 456MB, not attached, write enabled, RA81, noautosize, VHD format
sim> set rq2 format=simh
sim> sho rq2
RQ2, 456MB, not attached, write enabled, RA81, noautosize, SIMH format
sim> atta rq2 -c RA81-Copy.vhd VMS055.dsk
RQ2: creating new virtual disk 'RA81-Copy.vhd'
RQ2: Copied 456MB. 99% complete.
RQ2: Copied 456MB. Done.
sim> sho rq2
RQ2, 456MB, attached to RA81-Copy.vhd, write enabled, RA81, noautosize, VHD format
sim> det rq2
sim> ! dir RA81-Copy.vhd
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
04/14/2011 01:22 PM 178,304,512 RA81-Copy.vhd
1 File(s) 178,304,512 bytes
0 Dir(s) 2,896,097,280 bytes free
sim> ! dir VMS055.dsk
Volume in drive H is New Volume
Volume Serial Number is F8DE-510C
Directory of H:\Data
03/08/2011 01:42 PM 403,663,872 VMS055.dsk
1 File(s) 403,663,872 bytes
0 Dir(s) 2,896,097,280 bytes free
sim>
130 lines
5.7 KiB
C
130 lines
5.7 KiB
C
/* scp.h: simulator control program headers
|
|
|
|
Copyright (c) 1993-2008, Robert M Supnik
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
|
copy of this software and associated documentation files (the "Software"),
|
|
to deal in the Software without restriction, including without limitation
|
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
and/or sell copies of the Software, and to permit persons to whom the
|
|
Software is furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
Except as contained in this notice, the name of Robert M Supnik shall not
|
|
be used in advertising or otherwise to promote the sale, use or other dealings
|
|
in this Software without prior written authorization from Robert M Supnik.
|
|
|
|
05-Dec-10 MP Added macro invocation of sim_debug
|
|
09-Aug-06 JDB Added assign_device and deassign_device
|
|
14-Jul-06 RMS Added sim_activate_abs
|
|
06-Jan-06 RMS Added fprint_stopped_gen
|
|
Changed arg type in sim_brk_test
|
|
07-Feb-05 RMS Added ASSERT command
|
|
09-Sep-04 RMS Added reset_all_p
|
|
14-Feb-04 RMS Added debug prototypes (from Dave Hittner)
|
|
02-Jan-04 RMS Split out from SCP
|
|
*/
|
|
|
|
#ifndef _SIM_SCP_H_
|
|
#define _SIM_SCP_H_ 0
|
|
|
|
/* run_cmd parameters */
|
|
|
|
#define RU_RUN 0 /* run */
|
|
#define RU_GO 1 /* go */
|
|
#define RU_STEP 2 /* step */
|
|
#define RU_CONT 3 /* continue */
|
|
#define RU_BOOT 4 /* boot */
|
|
|
|
/* get_sim_opt parameters */
|
|
|
|
#define CMD_OPT_SW 001 /* switches */
|
|
#define CMD_OPT_OF 002 /* output file */
|
|
#define CMD_OPT_SCH 004 /* search */
|
|
#define CMD_OPT_DFT 010 /* defaults */
|
|
|
|
/* Command processors */
|
|
|
|
t_stat reset_cmd (int32 flag, char *ptr);
|
|
t_stat exdep_cmd (int32 flag, char *ptr);
|
|
t_stat eval_cmd (int32 flag, char *ptr);
|
|
t_stat load_cmd (int32 flag, char *ptr);
|
|
t_stat run_cmd (int32 flag, char *ptr);
|
|
t_stat attach_cmd (int32 flag, char *ptr);
|
|
t_stat detach_cmd (int32 flag, char *ptr);
|
|
t_stat assign_cmd (int32 flag, char *ptr);
|
|
t_stat deassign_cmd (int32 flag, char *ptr);
|
|
t_stat save_cmd (int32 flag, char *ptr);
|
|
t_stat restore_cmd (int32 flag, char *ptr);
|
|
t_stat exit_cmd (int32 flag, char *ptr);
|
|
t_stat set_cmd (int32 flag, char *ptr);
|
|
t_stat show_cmd (int32 flag, char *ptr);
|
|
t_stat brk_cmd (int32 flag, char *ptr);
|
|
t_stat do_cmd (int32 flag, char *ptr);
|
|
t_stat assert_cmd (int32 flag, char *ptr);
|
|
t_stat help_cmd (int32 flag, char *ptr);
|
|
t_stat spawn_cmd (int32 flag, char *ptr);
|
|
t_stat echo_cmd (int32 flag, char *ptr);
|
|
|
|
/* Utility routines */
|
|
|
|
t_stat sim_process_event (void);
|
|
t_stat sim_activate (UNIT *uptr, int32 interval);
|
|
t_stat sim_activate_abs (UNIT *uptr, int32 interval);
|
|
t_stat sim_cancel (UNIT *uptr);
|
|
int32 sim_is_active (UNIT *uptr);
|
|
double sim_gtime (void);
|
|
uint32 sim_grtime (void);
|
|
int32 sim_qcount (void);
|
|
t_stat attach_unit (UNIT *uptr, char *cptr);
|
|
t_stat detach_unit (UNIT *uptr);
|
|
t_stat assign_device (DEVICE *dptr, char *cptr);
|
|
t_stat deassign_device (DEVICE *dptr);
|
|
t_stat reset_all (uint32 start_device);
|
|
t_stat reset_all_p (uint32 start_device);
|
|
char *sim_dname (DEVICE *dptr);
|
|
t_stat get_yn (char *ques, t_stat deflt);
|
|
char *get_sim_opt (int32 opt, char *cptr, t_stat *st);
|
|
char *get_glyph (char *iptr, char *optr, char mchar);
|
|
char *get_glyph_nc (char *iptr, char *optr, char mchar);
|
|
t_value get_uint (char *cptr, uint32 radix, t_value max, t_stat *status);
|
|
char *get_range (DEVICE *dptr, char *cptr, t_addr *lo, t_addr *hi,
|
|
uint32 rdx, t_addr max, char term);
|
|
t_stat get_ipaddr (char *cptr, uint32 *ipa, uint32 *ipp);
|
|
t_value strtotv (char *cptr, char **endptr, uint32 radix);
|
|
t_stat fprint_val (FILE *stream, t_value val, uint32 rdx, uint32 wid, uint32 fmt);
|
|
CTAB *find_cmd (char *gbuf);
|
|
DEVICE *find_dev (char *ptr);
|
|
DEVICE *find_unit (char *ptr, UNIT **uptr);
|
|
DEVICE *find_dev_from_unit (UNIT *uptr);
|
|
REG *find_reg (char *ptr, char **optr, DEVICE *dptr);
|
|
CTAB *find_ctab (CTAB *tab, char *gbuf);
|
|
C1TAB *find_c1tab (C1TAB *tab, char *gbuf);
|
|
SHTAB *find_shtab (SHTAB *tab, char *gbuf);
|
|
BRKTAB *sim_brk_fnd (t_addr loc);
|
|
uint32 sim_brk_test (t_addr bloc, uint32 btyp);
|
|
void sim_brk_clrspc (uint32 spc);
|
|
char *match_ext (char *fnam, char *ext);
|
|
t_stat sim_cancel_step (void);
|
|
void sim_debug_u16 (uint32 dbits, DEVICE* dptr, const char* const* bitdefs,
|
|
uint16 before, uint16 after, int terminate);
|
|
#ifdef CANT_USE_MACRO_VA_ARGS
|
|
#define _sim_debug sim_debug
|
|
void sim_debug (uint32 dbits, DEVICE* dptr, const char* fmt, ...);
|
|
#else
|
|
void _sim_debug (uint32 dbits, DEVICE* dptr, const char* fmt, ...);
|
|
extern FILE *sim_deb; /* debug file */
|
|
#define sim_debug(dbits, dptr, ...) if (sim_deb && ((dptr)->dctrl & dbits)) _sim_debug (dbits, dptr, __VA_ARGS__)
|
|
#endif
|
|
void fprint_stopped_gen (FILE *st, t_stat v, REG *pc, DEVICE *dptr);
|
|
|
|
#endif
|