ref: a411870ee4640241e3c494367d922847da84f972
dir: /os/fads/main.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ureg.h"
#include "version.h"
/* where b.com or qboot leaves configuration info */
#define BOOTARGS ((char*)CONFADDR)
#define BOOTARGSLEN 1024
#define MAXCONF 32
extern ulong kerndate;
extern int cflag;
int remotedebug;
extern int main_pool_pcnt;
extern int heap_pool_pcnt;
extern int image_pool_pcnt;
char bootargs[BOOTARGSLEN+1];
char bootdisk[KNAMELEN];
char *confname[MAXCONF];
char *confval[MAXCONF];
int nconf;
extern void addconf(char *, char *);
/*
* arguments passed to initcode and /boot
*/
char argbuf[128];
static void
options(void)
{
long i, n;
char *cp, *line[MAXCONF], *p, *q;
/*
* parse configuration args from bootstrap
*/
memmove(bootargs, BOOTARGS, BOOTARGSLEN); /* where b.com leaves its config */
cp = bootargs;
cp[BOOTARGSLEN-1] = 0;
/*
* Strip out '\r', change '\t' -> ' '.
*/
p = cp;
for(q = cp; *q; q++){
if(*q == '\r')
continue;
if(*q == '\t')
*q = ' ';
*p++ = *q;
}
*p = 0;
n = getfields(cp, line, MAXCONF, 1, "\n");
for(i = 0; i < n; i++){
if(*line[i] == '#')
continue;
cp = strchr(line[i], '=');
if(cp == 0)
continue;
*cp++ = 0;
confname[nconf] = line[i];
confval[nconf] = cp;
nconf++;
}
}
void
doc(char *m)
{
USED(m);
print("%s...\n", m); uartwait();
}
static void
poolsizeinit(void)
{
ulong nb;
nb = conf.npage*BY2PG;
poolsize(mainmem, (nb*main_pool_pcnt)/100, 0);
poolsize(heapmem, (nb*heap_pool_pcnt)/100, 0);
poolsize(imagmem, (nb*image_pool_pcnt)/100, 1);
}
static void
serialconsole(void)
{
char *p;
int port, baud;
p = getconf("console");
if(p == nil)
p = "0";
if(p != nil && !remotedebug){
port = strtol(p, nil, 0);
baud = 9600;
p = getconf("baud");
if(p != nil){
baud = strtol(p, nil, 0);
if(baud < 9600)
baud = 9600;
}
uartspecial(port, baud, &kbdq, &printq, kbdcr2nl);
}
}
void
main(void)
{
machinit();
options();
archinit();
quotefmtinstall();
confinit();
cpminit();
xinit();
poolsizeinit();
trapinit();
mmuinit();
printinit();
uartinstall();
serialconsole();
doc("screeninit");
screeninit();
doc("kbdinit");
kbdinit();
doc("clockinit");
clockinit();
doc("procinit");
procinit();
cpuidprint();
doc("links");
links();
doc("chandevreset");
chandevreset();
eve = strdup("inferno");
print("\nInferno %s\n", VERSION);
print("Vita Nuova\n");
print("conf %s (%lud) jit %d\n\n",conffile, kerndate, cflag);
doc("userinit");
userinit();
doc("schedinit");
schedinit();
}
void
machinit(void)
{
int n;
n = m->machno;
memset(m, 0, sizeof(Mach));
m->machno = n;
m->mmask = 1<<m->machno;
m->iomem = KADDR(getimmr() & ~0xFFFF);
m->cputype = getpvr()>>16;
m->delayloop = 20000; /* initial estimate only; set by clockinit */
m->speed = 50; /* initial estimate only; set by archinit */
}
void
init0(void)
{
Osenv *o;
int i;
char buf[2*KNAMELEN];
up->nerrlab = 0;
spllo();
if(waserror())
panic("init0");
/*
* These are o.k. because rootinit is null.
* Then early kproc's will have a root and dot.
*/
o = up->env;
o->pgrp->slash = namec("#/", Atodir, 0, 0);
cnameclose(o->pgrp->slash->name);
o->pgrp->slash->name = newcname("/");
o->pgrp->dot = cclone(o->pgrp->slash);
chandevinit();
if(!waserror()){
ksetenv("cputype", "power", 0);
snprint(buf, sizeof(buf), "power %s", conffile);
ksetenv("terminal", buf, 0);
poperror();
}
for(i = 0; i < nconf; i++)
if(confname[i][0] != '*'){
if(!waserror()){
ksetenv(confname[i], confval[i], 0);
poperror();
}
}
poperror();
disinit("/osinit.dis");
}
void
userinit(void)
{
Proc *p;
Osenv *o;
p = newproc();
o = p->env;
o->fgrp = newfgrp(nil);
o->pgrp = newpgrp();
o->egrp = newegrp();
kstrdup(&o->user, eve);
strcpy(p->text, "interp");
/*
* Kernel Stack
*/
p->sched.pc = (ulong)init0;
p->sched.sp = (ulong)p->kstack+KSTACK;
ready(p);
}
Conf conf;
void
addconf(char *name, char *val)
{
if(nconf >= MAXCONF)
return;
confname[nconf] = name;
confval[nconf] = val;
nconf++;
}
char*
getconf(char *name)
{
int i;
for(i = 0; i < nconf; i++)
if(cistrcmp(confname[i], name) == 0)
return confval[i];
return 0;
}
void
confinit(void)
{
char *p;
int pcnt;
if(p = getconf("*kernelpercent"))
pcnt = 100 - strtol(p, 0, 0);
else
pcnt = 0;
conf.nscc = 4;
conf.smcuarts = 1<<0; /* SMC1 (usual console) */
conf.sccuarts = 1<<1; /* SCC2 available by default */
archconfinit();
conf.npage = conf.npage0 + conf.npage1;
if(pcnt < 10)
pcnt = 70;
conf.ialloc = (((conf.npage*(100-pcnt))/100)/2)*BY2PG;
conf.nproc = 100 + ((conf.npage*BY2PG)/MB)*5;
conf.nmach = MAXMACH;
}
void
exit(int ispanic)
{
up = 0;
spllo();
print("cpu %d exiting\n", m->machno);
/* Shutdown running devices */
chandevshutdown();
delay(1000);
splhi();
if(ispanic)
for(;;);
archreboot();
}
void
reboot(void)
{
exit(0);
}
void
halt(void)
{
print("cpu halted\n");
microdelay(1000);
for(;;)
;
}
int
isaconfig(char *class, int ctlrno, ISAConf *isa)
{
char cc[KNAMELEN], *p;
int i;
snprint(cc, sizeof cc, "%s%d", class, ctlrno);
p = getconf(cc);
if(p == nil)
return 0;
isa->nopt = tokenize(p, isa->opt, NISAOPT);
for(i = 0; i < isa->nopt; i++){
p = isa->opt[i];
if(cistrncmp(p, "type=", 5) == 0)
isa->type = p + 5;
else if(cistrncmp(p, "port=", 5) == 0)
isa->port = strtoul(p+5, &p, 0);
else if(cistrncmp(p, "irq=", 4) == 0)
isa->irq = strtoul(p+4, &p, 0);
else if(cistrncmp(p, "mem=", 4) == 0)
isa->mem = strtoul(p+4, &p, 0);
else if(cistrncmp(p, "size=", 5) == 0)
isa->size = strtoul(p+5, &p, 0);
else if(cistrncmp(p, "freq=", 5) == 0)
isa->freq = strtoul(p+5, &p, 0);
else if(cistrncmp(p, "dma=", 4) == 0)
isa->dma = strtoul(p+4, &p, 0);
}
return 1;
}
/*
* Save the mach dependent part of the process state.
*/
void
procsave(Proc*)
{
}
void
uartputs(char *s, int n)
{
// screenputs(buf, n);
putstrn(s, n);
uartwait();
}
/* stubs */
void
setfsr(ulong)
{
}
ulong
getfsr()
{
return 0;
}
void
setfcr(ulong)
{
}
ulong
getfcr()
{
return 0;
}