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MiNT 1.12
/*
Copyright 1990,1991,1992 Eric R. Smith.
Copyright 1992,1993,1994 Atari Corporation.
All rights reserved.
*/
#include "mint.h"
#include "version.h"
#include "cookie.h"
#include "xbra.h"
/* the kernel's stack size */
#define STACK 8*1024L
/* if the user is holding down the magic shift key, we ask before booting */
#define MAGIC_SHIFT 0x2 /* left shift */
/* magic number to show that we have captured the reset vector */
#define RES_MAGIC 0x31415926L
static void xbra_install P_((xbra_vec *, long, long ARGS_ON_STACK (*)()));
static void init_intr P_((void));
static long getmch P_((void));
static void do_line P_((char *));
static void do_file P_((int));
static void shutmedown P_((PROC *));
void shutdown P_((void));
static void doset P_((char *,char *));
static long ARGS_ON_STACK mint_criticerr P_((long));
static void ARGS_ON_STACK do_exec_os P_((register long basepage));
static int gem_active; /* 0 if AES has not started, nonzero otherwise */
#define EXEC_OS 0x4feL
static int check_for_gem P_((void));
static void run_auto_prgs P_((void));
#ifdef LATTICE
/*
* AGK: this is witchcraft to completely replace the startup code for
* Lattice; doing so saves around 10K on the final binary and pulls only
* long division & multitplication from the library (and not even those
* if you compile for native '030). The drawback of this code is it
* passes no environment or command line whatsoever. Since I always
* set MiNT options & environment in 'mint.cnf' this is not a personal
* downer, however at some point in the future we ought to have a kernel
* parseargs() like call which sets these things up.
*/
BASEPAGE *_base;
static void
start(BASEPAGE *bp)
{
long shrinklen;
_base = bp;
shrinklen = bp->p_tlen + bp->p_dlen + bp->p_blen + STACK + 0x100;
if (bp->p_lowtpa + shrinklen <= bp->p_hitpa) {
static char null[1] = {""};
static char *argv[2] = {null, NULL};
extern __builtin_putreg P_((int, long)); /* totally bogus */
__builtin_putreg(15, bp->p_lowtpa + shrinklen);
Mshrink((void *)bp->p_lowtpa, shrinklen);
main(1, argv);
}
Pterm(ENSMEM);
}
#endif
#if defined(__GNUC__) || defined(__MINT__)
long _stksize = STACK;
#ifndef PROFILING
#include <minimal.h>
#endif
#endif
int curs_off = 0; /* set if we should turn the cursor off when exiting */
int mint_errno = 0; /* error return from open and creat filesystem calls */
/*
* AGK: for proper co-processors we must consider saving their context.
* This variable when non-zero indicates that the BIOS considers a true
* coprocessor to be present. We use this variable in the context switch
* code to decide whether to attempt an FPU context save.
*/
short fpu = 0;
/*
* "mch" holds what kind of machine we are running on
*/
long mch = 0;
/*
* "screen_boundary+1" tells us how screens must be positioned
* (to a 256 byte boundary on STs, a 16 byte boundary on other
* machines; actually, 16 bytes is conservative, 4 is probably
* OK, but it doesn't hurt to be cautious). The +1 is because
* we're using this as a mask in the ROUND() macro in mem.h.
*/
int screen_boundary = 255;
/*
* variable holds processor type
*/
long mcpu = 0;
/*
* variable holds language preference
*/
int gl_lang = -1;
/*
* variable set if someone has already installed an flk cookie
*/
int flk = 0;
/*
* variable set to 1 if the _VDO cookie indicates Falcon style video
*/
int FalconVideo;
/* program to run at startup */
#ifdef MULTITOS
static int init_is_gem = 1; /* set to 1 if init_prg is GEM */
#else
static int init_is_gem = 0; /* set to 1 if init_prg is GEM */
BASEPAGE *gem_base = 0;
long gem_start = 0;
#endif
static const char *init_prg = 0;
/* note: init_tail is also used as a temporary stack for resets in
* intr.spp
*/
char init_tail[256];
/* initial environment for that program */
static char *init_env = 0;
/* temporary pointer into that environment for setenv */
static char *env_ptr;
/* length of the environment */
static long env_len;
/* GEMDOS pointer to current basepage */
BASEPAGE **tosbp;
/* pointer to the BIOS keyboard shift variable */
extern char *kbshft; /* see bios.c */
extern BCONMAP2_T *bconmap2; /* bconmap struct, see bios.c */
/* version of TOS we're running over */
int tosvers;
/* structures for keyboard/MIDI interrupt vectors */
KBDVEC *syskey, oldkey;
xbra_vec old_ikbd; /* old ikbd vector */
/* values the user sees for the DOS, BIOS, and XBIOS vectors */
long save_dos, save_bios, save_xbios;
/* values for original system vectors */
xbra_vec old_dos, old_bios, old_xbios, old_timer, old_vbl, old_5ms;
xbra_vec old_criticerr;
xbra_vec old_execos;
long old_term;
xbra_vec old_resvec; /* old reset vector */
long old_resval; /* old reset validation */
#ifdef EXCEPTION_SIGS
/* bus error, address error, illegal instruction, etc. vectors */
xbra_vec old_bus, old_addr, old_ill, old_divzero, old_trace, old_priv;
xbra_vec old_linef, old_chk, old_trapv, old_mmuconf, old_format, old_cpv;
xbra_vec old_uninit, old_spurious, old_fpcp[7], old_pmmuill, old_pmmuacc;
#endif
/* BIOS disk vectors */
xbra_vec old_mediach, old_getbpb, old_rwabs;
/* BIOS drive map */
long olddrvs;
extern Func bios_tab[], dos_tab[];
/* kernel info that is passed to loaded file systems and device drivers */
struct kerinfo kernelinfo = {
MAJ_VERSION, MIN_VERSION,
DEFAULT_MODE, 0,
bios_tab, dos_tab,
changedrv,
Trace, Debug, ALERT, FATAL,
kmalloc, kfree, umalloc, ufree,
strnicmp, stricmp, strlwr, strupr, ksprintf,
ms_time, unixtim, dostim,
nap, sleep, wake, wakeselect,
denyshare, denylock, addtimeout, canceltimeout,
addroottimeout, cancelroottimeout,
ikill,iwake
};
/* table of processor frame sizes in _words_ (not used on MC68000) */
unsigned char framesizes[16] = {
/*0*/ 0, /* MC68010/M68020/M68030/M68040 short */
/*1*/ 0, /* M68020/M68030/M68040 throwaway */
/*2*/ 2, /* M68020/M68030/M68040 instruction error */
/*3*/ 2, /* M68040 floating point post instruction */
/*4*/ 3, /* MC68LC040/MC68EC040 unimplemented floating point instruction */
/*5*/ 0, /* NOTUSED */
/*6*/ 0, /* NOTUSED */
/*7*/ 26, /* M68040 access error */
/*8*/ 25, /* MC68010 long */
/*9*/ 6, /* M68020/M68030 mid instruction */
/*A*/ 12, /* M68020/M68030 short bus cycle */
/*B*/ 42, /* M68020/M68030 long bus cycle */
/*C*/ 8, /* CPU32 bus error */
/*D*/ 0, /* NOTUSED */
/*E*/ 0, /* NOTUSED */
/*F*/ 13 /* 68070 and 9xC1xx microcontroller address error */
};
/* TOS and MiNT cookie jars, respectively. See the comments and code
* after main() for further details
*/
COOKIE *oldcookie, *newcookie;
/*
* install a new vector for address "addr", using the XBRA protocol.
* must run in supervisor mode!
*/
static void
xbra_install(xv, addr, func)
xbra_vec *xv;
long addr;
long ARGS_ON_STACK (*func)();
{
xv->xbra_magic = XBRA_MAGIC;
xv->xbra_id = MINT_MAGIC;
xv->jump = JMP_OPCODE;
xv->this = func;
xv->next = *((struct xbra **)addr);
*((short **)addr) = &xv->jump;
}
/*
* MiNT critical error handler; all it does is to jump through
* the vector for the current process
*/
static long ARGS_ON_STACK
mint_criticerr(error)
long error; /* high word is error, low is drive */
{
return (*curproc->criticerr)(error);
}
/*
* if we are MultiTOS, and if we are running from the AUTO folder,
* then we grab the exec_os vector and use that to start GEM; that
* way programs that expect exec_os to act a certain way will still
* work.
* NOTE: we must use Pexec instead of p_exec here, because we will
* be running in a user context (that of process 1, not process 0)
*/
static void ARGS_ON_STACK
do_exec_os(basepage)
register long basepage;
{
register long r;
/* if the user didn't specify a startup program, jump to the ROM */
if (!init_prg) {
register void ARGS_ON_STACK (*f) P_((long));
f = (void ARGS_ON_STACK (*) P_((long))) old_execos.next;
(*f)(basepage);
Pterm0();
} else {
/* we have to set a7 to point to lower in our TPA; otherwise we would
* bus error right after the Mshrink call!
*/
setstack(basepage+500L);
#if defined(__TURBOC__) && !defined(__MINT__)
Mshrink(0, (void *)basepage, 512L);
#else
Mshrink((void *)basepage, 512L);
#endif
r = Pexec(200, (char *)init_prg, init_tail, init_env);
Pterm((int)r);
}
}
/* initialize all interrupt vectors and new trap routines
* we also get here any TOS variables that we're going to change
* (e.g. the pointer to the cookie jar) so that rest_intr can
* restore them.
*/
static void
init_intr()
{
extern long ARGS_ON_STACK mint_bios();
extern long ARGS_ON_STACK mint_dos();
extern long ARGS_ON_STACK mint_timer();
extern long ARGS_ON_STACK mint_vbl();
extern long ARGS_ON_STACK mint_5ms();
extern long ARGS_ON_STACK mint_xbios();
extern long ARGS_ON_STACK reset();
extern long ARGS_ON_STACK new_ikbd();
extern long ARGS_ON_STACK new_bus();
extern long ARGS_ON_STACK new_addr();
extern long ARGS_ON_STACK new_ill();
extern long ARGS_ON_STACK new_divzero();
extern long ARGS_ON_STACK new_trace();
extern long ARGS_ON_STACK new_priv();
extern long ARGS_ON_STACK new_linef();
extern long ARGS_ON_STACK new_chk();
extern long ARGS_ON_STACK new_trapv();
extern long ARGS_ON_STACK new_fpcp();
extern long ARGS_ON_STACK new_mmu();
extern long ARGS_ON_STACK new_format();
extern long ARGS_ON_STACK new_cpv();
extern long ARGS_ON_STACK new_uninit();
extern long ARGS_ON_STACK new_spurious();
extern long ARGS_ON_STACK new_pmmuacc();
short savesr;
int i;
syskey = (KBDVEC *)Kbdvbase();
oldkey = *syskey;
xbra_install(&old_ikbd, (long)(&syskey->ikbdsys), new_ikbd);
/* gratuitous (void *) for Lattice */
old_term = (long)Setexc(0x102, (void *)-1UL);
savesr = spl7();
xbra_install(&old_dos, 0x84L, mint_dos);
save_dos = (long)old_dos.next;
xbra_install(&old_bios, 0xb4L, mint_bios);
save_bios = (long)old_bios.next;
xbra_install(&old_xbios, 0xb8L, mint_xbios);
save_xbios = (long)old_xbios.next;
xbra_install(&old_timer, 0x400L, mint_timer);
xbra_install(&old_criticerr, 0x404L, mint_criticerr);
xbra_install(&old_5ms, 0x114L, mint_5ms);
xbra_install(&old_vbl, 4*0x1cL, mint_vbl);
xbra_install(&old_resvec, 0x42aL, reset);
old_resval = *((long *)0x426L);
*((long *)0x426L) = RES_MAGIC;
spl(savesr);
#ifdef EXCEPTION_SIGS
/* set up signal handlers */
xbra_install(&old_bus, 8L, new_bus);
xbra_install(&old_addr, 12L, new_addr);
xbra_install(&old_ill, 16L, new_ill);
xbra_install(&old_divzero, 20L, new_divzero);
xbra_install(&old_trace, 36L, new_trace);
xbra_install(&old_priv, 32L, new_priv);
if (tosvers >= 0x106)
xbra_install(&old_linef, 44L, new_linef);
xbra_install(&old_chk, 24L, new_chk);
xbra_install(&old_trapv, 28L, new_trapv);
for (i = (int)(sizeof(old_fpcp) / sizeof(old_fpcp[0])); i--; ) {
xbra_install(&old_fpcp[i], 192L + i * 4, new_fpcp);
}
xbra_install(&old_mmuconf, 224L, new_mmu);
xbra_install(&old_pmmuill, 228L, new_mmu);
xbra_install(&old_pmmuacc, 232L, new_pmmuacc);
xbra_install(&old_format, 56L, new_format);
xbra_install(&old_cpv, 52L, new_cpv);
xbra_install(&old_uninit, 60L, new_uninit);
xbra_install(&old_spurious, 96L, new_spurious);
#endif
/* set up disk vectors */
xbra_install(&old_mediach, 0x47eL, new_mediach);
xbra_install(&old_rwabs, 0x476L, new_rwabs);
xbra_install(&old_getbpb, 0x472L, new_getbpb);
olddrvs = *((long *)0x4c2L);
/* set up cookie jar */
oldcookie = *CJAR; /* CJAR defined in cookie.h */
install_cookies();
}
/* restore all interrupt vectors and trap routines */
/*
* NOTE: This is *not* the approved way of unlinking XBRA trap handlers.
* Normally, one should trace through the XBRA chain. However, this is
* a very unusual situation: when MiNT exits, any TSRs or programs running
* under MiNT will no longer exist, and so any vectors that they have
* caught will be pointing to never-never land! So we do something that
* would normally be considered rude, and restore the vectors to
* what they were before we ran.
* BUG: we should restore *all* vectors, not just the ones that MiNT caught.
*/
void
restr_intr()
{
short savesr;
int i;
savesr = spl7();
*syskey = oldkey; /* restore keyboard vectors */
*tosbp = _base; /* restore GEMDOS basepage pointer */
*CJAR = oldcookie; /* restore old cookie jar */
#ifdef EXCEPTION_SIGS
*((long *)0x08L) = (long) old_bus.next;
*((long *)0x0cL) = (long) old_addr.next;
*((long *)0x10L) = (long) old_ill.next;
*((long *)0x14L) = (long) old_divzero.next;
*((long *)0x20L) = (long) old_priv.next;
*((long *)0x24L) = (long) old_trace.next;
if (old_linef.next)
*((long *)0x2cL) = (long) old_linef.next;
*((long *)0x18L) = (long) old_chk.next;
*((long *)0x1cL) = (long) old_trapv.next;
for (i = (int)(sizeof(old_fpcp) / sizeof(old_fpcp[0])); i--; ) {
((long *)0xc0L)[i] = (long) old_fpcp[i].next;
}
*((long *)0xe0L) = (long) old_mmuconf.next;
*((long *)0xe4L) = (long) old_pmmuill.next;
*((long *)0xe8L) = (long) old_pmmuacc.next;
*((long *)0x38L) = (long) old_format.next;
*((long *)0x34L) = (long) old_cpv.next;
*((long *)0x3cL) = (long) old_uninit.next;
*((long *)0x60L) = (long) old_spurious.next;
#endif
*((long *)0x84L) = (long) old_dos.next;
*((long *)0xb4L) = (long) old_bios.next;
*((long *)0xb8L) = (long) old_xbios.next;
*((long *)0x408L) = old_term;
*((long *)0x404L) = (long) old_criticerr.next;
*((long *)0x114L) = (long) old_5ms.next;
*((long *)0x400L) = (long) old_timer.next;
*((long *)0x70L) = (long) old_vbl.next;
*((long *)0x426L) = old_resval;
*((long *)0x42aL) = (long) old_resvec.next;
*((long *)0x476L) = (long) old_rwabs.next;
*((long *)0x47eL) = (long) old_mediach.next;
*((long *)0x472L) = (long) old_getbpb.next;
*((long *)0x4c2L) = olddrvs;
spl(savesr);
}
/* we save the TOS supervisor stack pointer so that we can reset it when
calling Pterm() (not that anyone will ever want to leave MiNT :-)).
*/
long tosssp; /* TOS supervisor stack pointer */
/*
* enter_kernel: called every time we enter the MiNT kernel via a trap
* call. Sets up the GEMDOS and BIOS vectors to point to TOS, and
* sets up other vectors and system variables appropriately. Note that
* calling enter_kernel multiple times is probably NOT a good idea,
* but the code will allow it.
* The parameter is a flag telling us whether or not this is a GEMDOS
* call; the BIOS uses this for checking security of Rwabs.
*/
short in_kernel = 0;
void ARGS_ON_STACK
enter_kernel(isGEMDOS)
int isGEMDOS;
{
short save_sr;
if (in_kernel) return;
save_sr = spl7();
curproc->in_dos = isGEMDOS;
save_dos = *((long *) 0x84L);
save_bios = *((long *) 0xb4L);
save_xbios = *((long *) 0xb8L);
*((long *) 0x84L) = (long)old_dos.next;
*((long *) 0xb4L) = (long)old_bios.next;
*((long *) 0xb8L) = (long)old_xbios.next;
*tosbp = _base;
in_kernel = 1;
spl(save_sr);
}
/*
* leave_kernel: called before leaving the kernel, either back to
* user mode or when calling a signal handler or the GEMDOS
* terminate vector. Note that interrupts should be disabled before
* this routine is called.
*/
void ARGS_ON_STACK
leave_kernel()
{
*((long *) 0x84L) = save_dos;
*((long *) 0xb4L) = save_bios;
*((long *) 0xb8L) = save_xbios;
*tosbp = curproc->base;
in_kernel = 0;
curproc->in_dos = 0;
}
/*
* shut down processes; this involves waking them all up, and sending
* them SIGTERM to give them a chance to clean up after themselves
*/
static void
shutmedown(p)
PROC *p;
{
UNUSED(p);
curproc->wait_cond = 0;
}
void
shutdown()
{
PROC *p;
int proc_left = 0;
curproc->sighandle[SIGCHLD] = SIG_IGN;
for (p = proclist; p; p = p->gl_next) {
if (p->pid == 0) continue;
if (p->wait_q != ZOMBIE_Q && p->wait_q != TSR_Q) {
if (p->wait_q != READY_Q) {
short sr = spl7();
rm_q(p->wait_q, p);
add_q(READY_Q, p);
spl(sr);
}
post_sig(p, SIGTERM);
proc_left++;
}
}
if (proc_left) {
/* sleep a little while, to give the other processes a chance to
shut down
*/
addtimeout(1000, shutmedown);
do {
sleep(WAIT_Q, (long)shutdown);
} while (curproc->wait_cond == (long)shutdown);
}
}
#if defined(__GNUC__) || defined(__MINT__)
int
main(argc, argv, envp)
int argc;
char **argv, **envp;
#else
int
main(argc, argv)
int argc;
char **argv;
#endif
{
long *sysbase;
long r;
extern int debug_level, debug_logging; /* in debug.c */
extern int no_mem_prot; /* memprot.c */
extern const char *greet1, *greet2;
/* welcome.c */
static char buf[SPRINTF_MAX];
static char curpath[128];
long yn;
FILEPTR *f;
#if defined(__GNUC__) || defined(__MINT__)
UNUSED(envp);
#endif
/* figure out what kind of machine we're running on */
/* biosfs wants to know this; also sets no_mem_prot */
/* 920625 kbad put it here so memprot_warning can be intelligent */
(void)Supexec(getmch);
#ifdef ONLY030
if (mcpu != 30) {
Cconws("\r\nThis version of MiNT requires a 68030.\r\n");
Cconws("Hit any key to continue.\r\n");
(void)Cconin();
Pterm0();
}
#endif
/* Ask the user if s/he wants to boot MiNT */
if ((Kbshift(-1) & MAGIC_SHIFT) == MAGIC_SHIFT) {
yn = boot_kernel_p();
Cconws("\r\n");
if (!yn)
Pterm0();
}
if (argv[0][0] == 0) { /* maybe started from the desktop */
curs_off = 1;
}
yn = 0; /* by default, don't print basepage */
--argc, ++argv;
while (argc && **argv == '-') {
if (argv[0][1] >= '0' && argv[0][1] <= '9') {
/* a number sets out_device to that device */
extern int out_device;
out_device = (int)atol(&argv[0][1]);
}
else if (argv[0][1] == 'b') {
/* print MiNT basepage */
yn++;
}
else if (argv[0][1] == 'd') {
/* -d increases debugging level */
debug_level++;
}
else if (argv[0][1] == 'm' || argv[0][1] == 'p') {
int givenotice = (argv[0][2] != 'w');
/* -m and -p turn off memory protection */
extern const char *memprot_notice, *memprot_warning;
if (no_mem_prot) {
if (givenotice)
Cconws(memprot_notice);
}
else {
no_mem_prot = 1;
if (givenotice)
Cconws(memprot_warning);
}
}
else if (argv[0][1] == 'l') {
/* -l turns on debug logging */
debug_logging = 1;
}
else {
Cconws("Unknown argument (ignored): ");
Cconws(*argv);
Cconws("\r\n");
}
++argv, --argc;
}
if (argc) {
Cconws("Unknown argument ignored: ");
Cconws(*argv);
Cconws(" (and all the rest)\r\n");
}
/* greetings */
Cconws(greet1);
ksprintf(buf, VERS_STRING, MAJ_VERSION, MIN_VERSION);
Cconws(buf);
Cconws(greet2);
#ifdef __TURBOC__
Cconws("PRELIMINARY PureC compiled version!\r\n");
#endif
if (yn)
{
ksprintf(buf,"MiNT@%lx\r\nhit a key...",_base);
Cconws(buf);
(void)Crawcin();
Cconws("\r\033K");
}
#ifdef notdef
/* if less than 1 megabyte free, turn off memory protection */
if (Mxalloc(-1L, 3) < ONE_MEG && !no_mem_prot) {
extern const char *insuff_mem_warning;
Cconws(insuff_mem_warning);
no_mem_prot = 1;
}
#endif
/* look for ourselves as \AUTO\MINTNP.PRG; if so, we turn memory
* protection off
*/
if (!no_mem_prot && Fsfirst("\\AUTO\\MINTNP.PRG",0) == 0)
no_mem_prot = 1;
/* check for GEM -- this must be done from user mode */
gem_active = check_for_gem();
/*
* get the current directory, so that we can switch back to it after
* the file systems are properly initialized
*/
/* set the current directory for the current process */
(void)Dgetpath(curpath, 0);
if (!*curpath) {
curpath[0] = '\\';
curpath[1] = 0;
}
tosssp = (long)Super(0L); /* enter supervisor mode */
if (!no_mem_prot)
save_mmu(); /* save current MMU setup */
/* get GEMDOS pointer to current basepage */
/* 0x4f2 points to the base of the OS; here we can find the OS compilation
date, and (in newer versions of TOS) where the current basepage pointer
is kept; in older versions of TOS, it's at 0x602c
*/
sysbase = *((long **)(0x4f2L)); /* gets the RAM OS header */
sysbase = (long *)sysbase[2]; /* gets the ROM one */
tosvers = (int)(sysbase[0] & 0x0000ffff);
if (tosvers == 0x100) {
if ((sysbase[7] & 0xfffe0000L) == 0x00080000L)
tosbp = (BASEPAGE **)0x873cL; /* SPANISH ROM */
else
tosbp = (BASEPAGE **) 0x602cL;
kbshft = (char *) 0x0e1bL;
} else {
tosbp = (BASEPAGE **) sysbase[10];
kbshft = (char *) sysbase[9];
}
if (tosvers >= 0x0400 && tosvers <= 0x404) {
bconmap2 = (BCONMAP2_T *)Bconmap(-2);
if (bconmap2->maptabsize == 1) {
/* Falcon BIOS Bconmap is busted */
bconmap2->maptabsize = 3;
}
has_bconmap = 1;
} else {
/* The TT TOS release notes are wrong... this is the real way to test
* for Bconmap ability
*/
has_bconmap = (Bconmap(0) == 0);
if (has_bconmap)
bconmap2 = (BCONMAP2_T *)Bconmap(-2);
}
/* initialize memory */
init_mem();
/* initialize the basic file systems */
timestamp = Tgettime();
datestamp = Tgetdate();
init_filesys();
/* initialize processes */
init_proc();
/* initialize system calls */
init_dos();
init_bios();
init_xbios();
/* NOTE: there's a call to kmalloc embedded in install_cookies, which
* is called by init_intr; so make sure this is the last of the
* init_* things called!
*/
init_intr();
enter_kernel(1); /* we'll be making GEMDOS calls */
#if 0
if (!gem_active) {
/* make MiNT invisible in the basepage chain, so that
* programs that rely on a certain basepage chain
* structure to determine whether or not they were run
* from the desktop will have a better chance of working.
* NOTE THAT THIS IS ONLY DONE TO HELP OUT BRAIN-DAMAGED
* SOFTWARE: do *not* try counting basepages to figure
* out whether or not you were run from the desktop!!!
*/
rootproc->base = _base->p_parent;
} else
#endif
rootproc->base = _base;
/* set up standard file handles for the current process
* do this here, *after* init_intr has set the Rwabs vector,
* so that AHDI doesn't get upset by references to drive U:
*/
f = do_open("U:\\DEV\\CONSOLE", O_RDWR, 0, (XATTR *)0);
if (!f) {
FATAL("unable to open CONSOLE device");
}
curproc->control = f;
curproc->handle[0] = f;
curproc->handle[1] = f;
f->links = 3;
f = do_open("U:\\DEV\\MODEM1", O_RDWR, 0, (XATTR *)0);
curproc->aux = f;
((struct tty *)f->devinfo)->aux_cnt = 1;
f->pos = 1; /* flag for close to --aux_cnt */
if (has_bconmap) {
/* If someone has already done a Bconmap call, then
* MODEM1 may no longer be the default
*/
bconmap(curbconmap);
f = curproc->aux; /* bconmap can change curproc->aux */
}
if (f) {
curproc->handle[2] = f;
f->links++;
}
f = do_open("U:\\DEV\\CENTR", O_RDWR, 0, (XATTR *)0);
if (f) {
curproc->handle[3] = curproc->prn = f;
f->links = 2;
}
f = do_open("U:\\DEV\\MIDI", O_RDWR, 0, (XATTR *)0);
if (f) {
curproc->midiin = curproc->midiout = f;
((struct tty *)f->devinfo)->aux_cnt = 1;
f->pos = 1; /* flag for close to --aux_cnt */
f->links = 2;
}
/* load external file systems */
/* set path first to make sure that MiNT's directory matches
* GEMDOS's
*/
d_setpath(curpath);
load_devdriver();
#ifndef PROFILING
/* load_filesys causes media changes :-( */
load_filesys();
#endif
/* note that load_filesys changed the
* directory on us!!
*/
(void)d_setpath(curpath);
/* load the configuration file */
load_config();
*((long *)0x4c2L) |= PSEUDODRVS;
if (init_env == 0)
init_env = (char *)_base->p_env;
/* empty environment? Set the PATH variable to the root of the current drive */
if (init_env[0] == 0) {
static char path_env[] = "PATH=\0C:\0";
path_env[6] = curproc->curdrv + 'A';
init_env = path_env;
}
/* if we are MultiTOS, we're running in the AUTO folder, and our INIT is
* in fact GEM, take the exec_os() vector. (We know that INIT is GEM
* if the user told us so by using GEM= instead of INIT=.)
*/
if (!gem_active && init_is_gem) {
xbra_install(&old_execos, EXEC_OS, (long ARGS_ON_STACK (*)())do_exec_os);
}
/* run any programs appearing after us in the AUTO folder */
run_auto_prgs();
/* run the initial program */
/* if that program is in fact GEM, we start it via exec_os, otherwise
* we do it with Pexec.
* the logic is: if the user specified init_prg, and it is not
* GEM, then we try to execute it; if it *is* GEM (e.g. gem.sys),
* then we try to execute it if gem is already active, otherwise
* we jump through the exec_os vector (which we grabbed above) in
* order to start it. We *never* go through exec_os if we're not in
* the AUTO folder.
*/
if (init_prg && (!init_is_gem || gem_active)) {
r = p_exec(0, (char *)init_prg, init_tail, init_env);
} else if (!gem_active) {
BASEPAGE *bp; int pid;
bp = (BASEPAGE *)p_exec(7,
(char *)((long)F_FASTLOAD | F_ALTLOAD | F_ALTALLOC | F_PROT_S),
(char *)"\0", init_env);
bp->p_tbase = *((long *) EXEC_OS );
#ifndef MULTITOS
if (((long *) sysbase[5])[0] == 0x87654321)
gem_start = ((long *) sysbase[5])[2];
gem_base = bp;
#endif
r = p_exec(106, (char *)"GEM", bp, 0L);
pid = (int)r;
if (pid > 0) {
do {
r = p_wait3(0, (long *)0);
} while(pid != ((r & 0xffff0000L) >> 16));
r &= 0x0000ffff;
}
} else {
Cconws("If MiNT is run after GEM starts, you must specify a program\r\n");
Cconws("to run initially in MINT.CNF, with an INIT= line\r\n");
r = 0;
}
if (r < 0 && init_prg) {
ksprintf(buf, "FATAL: couldn't run %s\r\n", init_prg);
Cconws(buf);
}
if (r) {
ksprintf(buf, "exit code: %ld\r\n", r);
Cconws(buf);
}
rootproc->base = _base;
/* shut down all processes gracefully */
shutdown();
/* put everything back and exit */
if (!gem_active && init_is_gem) {
/* we stole exec_os above */
*((long *)EXEC_OS) = (long)old_execos.next;
}
restr_intr();
close_filesys();
if (!no_mem_prot)
restr_mmu();
restr_screen();
(void)Super((void *)tosssp); /* gratuitous (void *) for Lattice */
Cconws("leaving MiNT\r\n");
if (curs_off)
Cconws("\033f"); /* disable cursor */
return 0;
}
/*
* cookie jar handling routines. The "cookie jar" is an area of memory
* reserved by TOS for TSR's and utility programs; the idea is that
* you put a cookie in the jar to notify people of available services.
* The BIOS uses the cookie jar in TOS 1.6 and higher; for earlier versions
* of TOS, the jar is always empty (unless someone added a cookie before
* us; POOLFIX does, for example).
* MiNT establishes an entirely new cookie jar (with the old cookies copied
* over) and frees it on exit. That's because TSR's run under MiNT
* will no longer be accessible after MiNT exits.
* MiNT also puts a cookie in the jar, with tag field 'MiNT' (of course)
* and with the major version of MiNT in the high byte of the low word,
* and the minor version in the low byte.
*/
void
install_cookies()
{
COOKIE *cookie;
int i, ncookies;
long ncsize;
extern long rsvf;
/* note that init_intr sets oldcookie to the old cookie jar */
ncookies = 0;
cookie = oldcookie;
if (cookie) {
while (cookie->tag.aslong != 0) {
/* check for true FPU co-processor */
if (!strncmp(cookie->tag.aschar, "_FPU",4) &&
(cookie->value >> 16) >= 2)
fpu = 1;
/* check for _FLK cookie */
else if (!strncmp(cookie->tag.aschar, "_FLK",4))
flk = 1;
/* ..and for RSVF */
else if (!strncmp(cookie->tag.aschar, "RSVF",4))
rsvf = cookie->value;
cookie++; ncookies++;
}
}
/*
* We allocate the cookie jar in global memory so anybody can read
* it or write it. This code allocates at least 8 more cookies, and
* then rounds up to a QUANTUM boundary (that's what ROUND does).
* Probably, nobody will have to allocate another cookie jar :-)
*/
/* NOTE: obviously, we can do this only if init_intr is called
* _after_ memory, processes, etc. have been initialized
*/
ncsize = (ncookies+8)*sizeof(COOKIE);
ncsize = ROUND(ncsize);
newcookie = (COOKIE *)alloc_region(core, ncsize, PROT_G);
/* copy the old cookies to the new jar */
for (i = 0, cookie = oldcookie; i < ncookies;) {
/*
* but don't copy RSVF, MiNTs /dev is for real...
* (if you want to know whats in there use ls :)
*/
if (!strncmp(cookie->tag.aschar, "RSVF",4)) {
++cookie, --ncookies;
continue;
}
newcookie[i++] = *cookie++;
}
/* install MiNT cookie */
strncpy(newcookie[i].tag.aschar, "MiNT", 4);
newcookie[i].value = (MAJ_VERSION << 8) | MIN_VERSION;
i++;
/* install _FLK cookie to indicate that file locking works */
if (!flk) {
strncpy(newcookie[i].tag.aschar, "_FLK", 4);
newcookie[i].value = 0;
i++;
}
/* jr: install PMMU cookie if memory protection is used */
if (!no_mem_prot) {
strncpy(newcookie[i].tag.aschar, "PMMU", 4);
newcookie[i].value = 0;
i++;
}
/* the last cookie should have a 0 tag, and a value indicating the number
* of slots, total
*/
newcookie[i].tag.aslong = 0;
newcookie[i].value = ncsize/sizeof(COOKIE);
*CJAR = newcookie;
}
/*
* Get the value of the _MCH cookie, if one exists; also set no_mem_prot if
* there's a _CPU cookie and you're not on an '030, or if there is none.
* This must be done in a separate routine because the machine type and CPU
* type are needed when initializing the system, whereas install_cookies is
* not called until everything is practically up.
* In fact, getmch() should be called before *anything* else is
* initialized, so that if we find a MiNT cookie already in the
* jar we can bail out early and painlessly.
*/
static long
getmch()
{
COOKIE *jar;
int foundcpu = 0;
int i;
long *sysbase;
extern int no_mem_prot;
mcpu = 0;
jar = *CJAR; /* CJAR defined in cookie.h */
if (jar) {
while (jar->tag.aslong != 0) {
/* check for machine type */
if (!strncmp(jar->tag.aschar, "_MCH",4)) {
mch = jar->value;
} else if (!strncmp(jar->tag.aschar, "_CPU",4)) {
/* if not '030 then no memory protection */
mcpu = jar->value;
if (jar->value != 30) no_mem_prot = 1;
foundcpu = 1;
} else if (!strncmp(jar->tag.aschar, "_VDO",4)) {
FalconVideo = (jar->value == 0x00030000L);
if (jar->value & 0xffff0000L)
screen_boundary = 15;
} else if (!strncmp(jar->tag.aschar, "MiNT",4)) {
Cconws("MiNT is already installed!!\r\n");
Pterm(2);
} else if (!strncmp(jar->tag.aschar, "_AKP",4)) {
gl_lang = (int) ((jar->value >> 8) & 0x00ff);
} else if (!strncmp(jar->tag.aschar, "PMMU",4)) {
/* jr: if PMMU cookie exists, someone else is
already using the PMMU */
Cconws ("MiNT: PMMU already in use, memory protection turned off.\r\n");
no_mem_prot = 1;
}
jar++;
}
}
if (!foundcpu) no_mem_prot = 1;
/*
* if no preference found, look at the country code to decide
*/
if (gl_lang < 0) {
sysbase = *((long **)(0x4f2L)); /* gets the RAM OS header */
sysbase = (long *)sysbase[2]; /* gets the ROM one */
i = (int) ((sysbase[7] & 0x7ffe0000L) >> 17L);
switch(i) {
case 1: /* Germany */
case 8: /* Swiss German */
gl_lang = 1;
break;
case 2: /* France */
case 7: /* Swiss French */
gl_lang = 2;
break;
case 4: /* Spain */
gl_lang = 4;
break;
case 5: /* Italy */
gl_lang = 5;
break;
default:
gl_lang = 0;
break;
}
}
if (gl_lang >= MAXLANG || gl_lang < 0)
gl_lang = 0;
return 0L;
}
/*
* routines for reading the configuration file
* we allow the following commands in the file:
* # anything -- comment
* INIT=file -- specify boot program
* CON=file -- specify initial file/device for handles -1, 0, 1
* PRN=file -- specify initial file for handle 3
* BIOSBUF=[yn] -- if 'n' or 'N' then turn off BIOSBUF feature
* DEBUG_LEVEL=n -- set debug level to (decimal number) n
* DEBUG_DEVNO=n -- set debug device number to (decimal number) n
* HARDSCROLL=n -- set hard-scroll size to n, range 0-99.
* SLICES=nnn -- set multitasking granularity
* echo message -- print a message on the screen
* alias drive path -- make a fake drive pointing at a path
* cd dir -- change directory/drive
* exec cmd args -- execute a program
* setenv name val -- set up environment
* sln file1 file2 -- create a symbolic link
* ren file1 file2 -- rename a file
*
* BUG: if you use setenv in mint.cnf, *none* of the original environment
* gets passed to children. This is rarely a problem if mint.prg is
* in the auto folder.
*/
extern short bconbdev, bconbsiz; /* from bios.c */
static void
doset(name, val)
char *name, *val;
{
char *t;
if (!strcmp(name, "GEM")) {
init_is_gem = 1;
goto setup_init;
}
if (!strcmp(name, "INIT")) {
init_is_gem = 0;
setup_init:
if (!*val) return;
t = kmalloc(strlen(val)+1);
if (!t) return;
strcpy(t, val);
init_prg = t;
while (*t && !isspace(*t)) t++;
/* get the command tail, too */
if (*t) {
*t++ = 0;
strncpy(init_tail+1, t, 125);
init_tail[126] = 0;
init_tail[0] = strlen(init_tail+1);
}
return;
}
if (!strcmp(name, "CON")) {
FILEPTR *f;
int i;
f = do_open(val, O_RDWR, 0, (XATTR *)0);
if (f) {
for (i = -1; i < 2; i++) {
do_close(curproc->handle[i]);
curproc->handle[i] = f;
f->links++;
}
f->links--; /* correct for overdoing it */
}
return;
}
if (!strcmp(name, "PRN")) {
FILEPTR *f;
f = do_open(val, O_RDWR|O_CREAT|O_TRUNC, 0, (XATTR *)0);
if (f) {
do_close(curproc->handle[3]);
do_close(curproc->prn);
curproc->prn = curproc->handle[3] = f;
f->links = 2;
}
return;
}
if (!strcmp(name, "BIOSBUF")) {
if (*val == 'n' || *val == 'N') {
if (bconbsiz) bflush();
bconbdev = -1;
}
return;
}
if (!strcmp(name, "DEBUG_LEVEL")) {
extern int debug_level;
if (*val >= '0' && *val <= '9')
debug_level = (int)atol(val);
else ALERT("Bad arg to \"DEBUG_LEVEL\" in cnf file");
return;
}
if (!strcmp(name, "DEBUG_DEVNO")) {
extern int out_device;
if (*val >= '0' && *val <= '9')
out_device= (int)atol(val);
else ALERT("Bad arg to \"DEBUG_DEVNO\" in cnf file");
return;
}
#ifdef FASTTEXT
if (!strcmp(name, "HARDSCROLL")) {
int i;
extern int hardscroll;
if (!strcmp(val, "AUTO")) {
hardscroll = -1;
return;
}
i = *val++;
if (i < '0' || i > '9') return;
hardscroll = i-'0';
i = *val;
if (i < '0' || i > '9') return;
hardscroll = 10*hardscroll + i - '0';
return;
}
#endif
if (!strcmp(name, "MAXMEM")) {
long r;
r = atol(val) * 1024L;
if (r > 0)
p_setlimit(2, r);
return;
}
if (!strcmp(name, "SLICES")) {
extern short time_slice;
time_slice = atol(val);
return;
}
if (!strcmp(name, "PSEUDODRIVES")) {
FORCE("PSEUDODRIVES= no longer supported");
return;
}
FORCE("Unknown variable `%s'", name);
}
/* Execute a line from the config file */
static void
do_line(line)
char *line;
{
char *cmd, *arg1, *arg2;
char *newenv;
char *t;
int i;
char delim;
while (*line == ' ') line++; /* skip whitespace at start of line */
if (*line == '#') return; /* ignore comments */
if (!*line) return; /* and also blank lines */
cmd = line;
/* check for variable assignments (e.g. INIT=, etc.) */
/*
* AGK: note we check for spaces whilst scanning so that an environment
* variable may include an =, this has the unfortunate side effect that
* the '=' _has_ to be concatenated to the variable name (INIT etc.)
*/
for (t = cmd; *t && *t != ' '; t++) {
if (*t == '=') {
*t++ = 0;
doset(cmd, t);
return;
}
}
/* OK, assume a regular command; break it up into 'cmd', 'arg1', arg2' */
while (*line && *line != ' ') line++;
delim = ' ';
if (*line) {
*line++ = 0;
while (*line == ' ') line++;
if (*line == '"') {
delim = '"';
line++;
}
}
if (!strcmp(cmd, "echo")) {
c_conws(line); c_conws("\r\n");
return;
}
arg1 = line;
while (*line && *line != delim) line++;
delim = ' ';
if (*line) {
*line++ = 0;
while (*line == ' ') line++;
if (*line == '"') {
delim = '"';
line++;
}
}
if (!strcmp(cmd, "cd")) {
int drv;
(void)d_setpath(arg1);
drv = toupper(*arg1) - 'A';
if (arg1[1] == ':') (void)d_setdrv(drv);
return;
}
if (!strcmp(cmd, "exec")) {
char cmdline[128];
int i;
i = strlen(line);
if (i > 126) i = 126;
cmdline[0] = i;
strncpy(cmdline+1, line, i);
cmdline[i+1] = 0;
i = (int)p_exec(0, arg1, cmdline, init_env);
if (i == -33) {
FORCE("%s: file not found", arg1);
} else if (i < 0) {
FORCE("%s: error while attempting to execute", arg1);
}
return;
}
if (!strcmp(cmd, "setenv")) {
if (strlen(arg1) + strlen(line) + 4 + (env_ptr - init_env) >
env_len) {
long j;
env_len += 1024;
newenv = (char *)m_xalloc(env_len, 0x13);
if (init_env) {
t = init_env;
j = env_ptr - init_env;
env_ptr = newenv;
for (i = 0; i < j; i++)
*env_ptr++ = *t++;
if (init_env)
m_free((virtaddr)init_env);
} else {
env_ptr = newenv;
}
init_env = newenv;
}
while (*arg1) {
*env_ptr++ = *arg1++;
}
*env_ptr++ = '=';
while (*line) {
*env_ptr++ = *line++;
}
*env_ptr++ = 0;
*env_ptr = 0;
return;
}
if (!strcmp (cmd, "include")) {
long fd = f_open (arg1, 0);
if (fd < 0) {
ALERT ("include: cannot open file %s", arg1);
return;
}
do_file ((int)fd);
f_close ((int)fd);
return;
}
arg2 = line;
while (*line && *line != delim) line++;
if (*line) {
*line = 0;
}
if (!strcmp(cmd, "alias")) {
int drv;
long r;
fcookie root_dir;
extern int aliasdrv[];
drv = toupper(*arg1) - 'A';
if (drv < 0 || drv >= NUM_DRIVES) {
ALERT("Bad drive (%c:) in alias", drv+'A');
return;
}
r = path2cookie(arg2, NULL, &root_dir);
if (r) {
ALERT("alias: TOS error %ld while looking for %s",
r, arg2);
return;
}
aliasdrv[drv] = root_dir.dev + 1;
*((long *)0x4c2L) |= (1L << drv);
release_cookie(&curproc->curdir[drv]);
dup_cookie(&curproc->curdir[drv], &root_dir);
release_cookie(&curproc->root[drv]);
curproc->root[drv] = root_dir;
return;
}
if (!strcmp(cmd, "sln")) {
(void)f_symlink(arg1, arg2);
return;
}
if (!strcmp(cmd, "ren")) {
(void)f_rename(0, arg1, arg2);
return;
}
FORCE("syntax error in mint.cnf near: %s", cmd);
}
#undef BUF
#undef LINE
#define BUF 512
#define LINE 256
static void
do_file(fd)
int fd;
{
long r;
char buf[BUF+1], c;
char line[LINE+1];
char *from;
int count = 0;
buf[BUF] = 0;
from = &buf[BUF];
line[LINE] = 0;
for(;;) {
c = *from++;
if (!c) {
r = f_read(fd, (long)BUF, buf);
if (r <= 0) break;
buf[r] = 0;
from = buf;
} else if (c == '\r') {
continue;
} else if (c == '\n') {
line[count] = 0;
do_line(line);
count = 0;
} else {
if (count < LINE) {
line[count++] = c;
}
}
}
if (count) {
line[count] = 0;
do_line(line);
}
}
void
load_config()
{
int fd;
fd = (int) f_open("mint.cnf", 0);
if (fd < 0)
fd = (int) f_open("\\mint\\mint.cnf", 0);
if (fd < 0)
fd = (int) f_open("\\multitos\\mint.cnf", 0);
if (fd < 0) return;
do_file(fd);
f_close(fd);
}
/*
* run programs in the AUTO folder that appear after MINT.PRG
* some things to watch out for:
* (1) make sure GEM isn't active
* (2) make sure there really is a MINT.PRG in the auto folder
*/
/*
* some global variables used to see if GEM is active
*/
static short aes_intout[64];
static short aes_dummy[64];
static short aes_globl[15];
static short aes_cntrl[6] = { 10, 0, 1, 0, 0 };
short *aes_pb[6] = { aes_cntrl, aes_globl, aes_dummy, aes_intout,
aes_dummy, aes_dummy };
/* check for whether GEM is active; remember, this *must* be done in
* user mode
*/
static int
check_for_gem()
{
call_aes(aes_pb); /* does an appl_init */
return aes_globl[0];
}
static void
run_auto_prgs()
{
DTABUF *dta;
long r;
static char pathspec[32] = "\\AUTO\\";
short runthem = 0; /* set to 1 after we find MINT.PRG */
/* if the AES is running, don't check AUTO */
if (gem_active) {
return;
}
/* OK, now let's run through \\AUTO looking for
* programs...
*/
dta = (DTABUF *)f_getdta();
r = f_sfirst("\\AUTO\\*.PRG", 0);
while (r >= 0) {
if (!strcmp(dta->dta_name, "MINT.PRG") ||
!strcmp(dta->dta_name, "MINTNP.PRG"))
runthem = 1;
else if (runthem) {
strcpy(pathspec+6, dta->dta_name);
(void)p_exec(0, pathspec, (char *)"", init_env);
}
r = f_snext();
}
}
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