ref: a70b93a356662355214f5405edda066786f6dd03
dir: /sys/src/9/mtx/main.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "init.h"
#include "pool.h"
Conf conf;
FPsave initfp;
void
main(void)
{
memset(edata, 0, (ulong)end-(ulong)edata);
conf.nmach = 1;
machinit();
ioinit();
i8250console();
quotefmtinstall();
print("\nPlan 9\n");
confinit();
xinit();
raveninit();
trapinit();
printinit();
cpuidprint();
mmuinit();
hwintrinit();
clockinit();
procinit0();
initseg();
timersinit();
links();
chandevreset();
pageinit();
fpsave(&initfp);
initfp.fpscr = 0;
userinit();
schedinit();
}
void
machinit(void)
{
memset(m, 0, sizeof(Mach));
m->cputype = getpvr()>>16;
/*
* For polled uart output at boot, need
* a default delay constant. 100000 should
* be enough for a while. Cpuidentify will
* calculate the real value later.
*/
m->loopconst = 100000;
/* turn on caches */
puthid0(gethid0() | BIT(16) | BIT(17));
active.machs[0] = 1;
active.exiting = 0;
}
void
cpuidprint(void)
{
char *id;
id = "unknown PowerPC";
switch(m->cputype) {
case 9:
id = "PowerPC 604e";
break;
}
print("cpu0: %s\n", id);
}
static struct
{
char *name;
char *val;
}
plan9ini[] =
{
{ "console", "0" },
{ "ether0", "type=2114x" },
};
char*
getconf(char *name)
{
int i;
for(i = 0; i < nelem(plan9ini); i++)
if(cistrcmp(name, plan9ini[i].name) == 0)
return plan9ini[i].val;
return nil;
}
void
init0(void)
{
// char **p, *q, name[KNAMELEN];
// int n;
char buf[2*KNAMELEN];
up->nerrlab = 0;
spllo();
/*
* These are o.k. because rootinit is null.
* Then early kproc's will have a root and dot.
*/
up->slash = namec("#/", Atodir, 0, 0);
pathclose(up->slash->path);
up->slash->path = newpath("/");
up->dot = cclone(up->slash);
chandevinit();
if(!waserror()){
snprint(buf, sizeof(buf), "power %s mtx", conffile);
ksetenv("terminal", buf, 0);
ksetenv("cputype", "power", 0);
if(cpuserver)
ksetenv("service", "cpu", 0);
else
ksetenv("service", "terminal", 0);
/*
for(p = confenv; *p; p++) {
q = strchr(p[0], '=');
if(q == 0)
continue;
n = q-p[0];
if(n >= KNAMELEN)
n = KNAMELEN-1;
memmove(name, p[0], n);
name[n] = 0;
if(name[0] != '*')
ksetenv(name, q+1, 0);
ksetenv(name, q+1, 1);
}
*/
poperror();
}
kproc("alarm", alarmkproc, 0);
kproc("mmusweep", mmusweep, 0);
touser((void*)(USTKTOP-8));
}
void
userinit(void)
{
Proc *p;
Segment *s;
KMap *k;
Page *pg;
p = newproc();
p->pgrp = newpgrp();
p->egrp = smalloc(sizeof(Egrp));
p->egrp->ref = 1;
p->fgrp = dupfgrp(nil);
p->rgrp = newrgrp();
p->procmode = 0640;
kstrdup(&eve, "");
kstrdup(&p->text, "*init*");
kstrdup(&p->user, eve);
p->fpstate = FPinit;
/*
* Kernel Stack
*
* N.B. The -12 for the stack pointer is important.
* 4 bytes for gotolabel's return PC
*/
p->sched.pc = (ulong)init0;
p->sched.sp = (ulong)p->kstack+KSTACK-(sizeof(Sargs)+BY2WD);
/*
* User Stack
*/
s = newseg(SG_STACK, USTKTOP-USTKSIZE, USTKSIZE/BY2PG);
p->seg[SSEG] = s;
pg = newpage(1, 0, USTKTOP-BY2PG);
segpage(s, pg);
/*
* Text
*/
s = newseg(SG_TEXT, UTZERO, 1);
s->flushme++;
p->seg[TSEG] = s;
pg = newpage(1, 0, UTZERO);
pg->txtflush = ~0;
segpage(s, pg);
k = kmap(s->map[0]->pages[0]);
memmove((ulong*)VA(k), initcode, sizeof initcode);
kunmap(k);
ready(p);
}
/* still to do */
void
reboot(void*, void*, ulong)
{
}
void
exit(int)
{
cpushutdown();
watchreset();
}
/*
* set up floating point for a new process
*/
void
procsetup(Proc *p)
{
p->fpstate = FPinit;
}
void
procfork(Proc *)
{
}
/*
* Save the mach dependent part of the process state.
*/
void
procsave(Proc *p)
{
if(p->fpstate == FPactive){
if(p->state != Moribund)
fpsave(up->fpsave);
p->fpstate = FPinactive;
}
}
void
confinit(void)
{
char *p;
int userpcnt;
ulong pa, kpages;
extern ulong memsize; /* passed in from ROM monitor */
if(p = getconf("*kernelpercent"))
userpcnt = 100 - strtol(p, 0, 0);
else
userpcnt = 0;
pa = PGROUND(PADDR(end));
conf.mem[0].npage = memsize/BY2PG;
conf.mem[0].base = pa;
conf.npage = conf.mem[0].npage;
conf.nmach = 1;
conf.nproc = 100 + ((conf.npage*BY2PG)/MB)*5;
if(cpuserver)
conf.nproc *= 3;
if(conf.nproc > 2000)
conf.nproc = 2000;
conf.nimage = 200;
conf.nswap = conf.nproc*80;
conf.nswppo = 4096;
conf.copymode = 0; /* copy on write */
if(cpuserver) {
if(userpcnt < 10)
userpcnt = 70;
kpages = conf.npage - (conf.npage*userpcnt)/100;
/*
* Hack for the big boys. Only good while physmem < 4GB.
* Give the kernel a max. of 16MB + enough to allocate the
* page pool.
* This is an overestimate as conf.upages < conf.npages.
* The patch of nimage is a band-aid, scanning the whole
* page list in imagereclaim just takes too long.
*/
if(kpages > (16*MB + conf.npage*sizeof(Page))/BY2PG){
kpages = (16*MB + conf.npage*sizeof(Page))/BY2PG;
conf.nimage = 2000;
kpages += (conf.nproc*KSTACK)/BY2PG;
}
} else {
if(userpcnt < 10) {
if(conf.npage*BY2PG < 16*MB)
userpcnt = 40;
else
userpcnt = 60;
}
kpages = conf.npage - (conf.npage*userpcnt)/100;
/*
* Make sure terminals with low memory get at least
* 4MB on the first Image chunk allocation.
*/
if(conf.npage*BY2PG < 16*MB)
imagmem->minarena = 4*1024*1024;
}
conf.upages = conf.npage - kpages;
conf.ialloc = (kpages/2)*BY2PG;
/*
* Guess how much is taken by the large permanent
* datastructures. Mntcache and Mntrpc are not accounted for.
*/
kpages *= BY2PG;
kpages -= conf.upages*sizeof(Page)
+ conf.nproc*sizeof(Proc)
+ conf.nimage*sizeof(Image)
+ conf.nswap
+ conf.nswppo*sizeof(Page*);
mainmem->maxsize = kpages;
if(!cpuserver){
/*
* give terminals lots of image memory, too; the dynamic
* allocation will balance the load properly, hopefully.
* be careful with 32-bit overflow.
*/
imagmem->maxsize = kpages;
}
// conf.monitor = 1; /* BUG */
}
static int
getcfields(char* lp, char** fields, int n, char* sep)
{
int i;
for(i = 0; lp && *lp && i < n; i++){
while(*lp && strchr(sep, *lp) != 0)
*lp++ = 0;
if(*lp == 0)
break;
fields[i] = lp;
while(*lp && strchr(sep, *lp) == 0){
if(*lp == '\\' && *(lp+1) == '\n')
*lp++ = ' ';
lp++;
}
}
return i;
}
int
isaconfig(char *class, int ctlrno, ISAConf *isa)
{
char cc[32], *p, *x;
int i;
snprint(cc, sizeof cc, "%s%d", class, ctlrno);
p = getconf(cc);
if(p == nil)
return 0;
x = nil;
kstrdup(&x, p);
p = x;
isa->type = "";
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, "dma=", 4) == 0)
isa->dma = 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);
}
return 1;
}
void
setupwatchpts(Proc *, Watchpt *, int n)
{
if(n > 0)
error("no watchpoints");
}