void
archreset(void)
{
static int beenhere;
if (beenhere)
return;
beenhere = 1;
/* conservative temporary values until archconfinit runs */
m->cpuhz = 1000 * Mhz; /* trimslice speed */
m->delayloop = m->cpuhz/2000; /* initial estimate */
prcachecfg();
clockson();
/* all partitions were powered up by u-boot, so needn't do anything */
archconfinit();
// resetusb();
fpon();
if (irqtooearly)
panic("archreset: too early for irqenable");
irqenable(Cpu0irq, sgintr, nil, "cpu0");
irqenable(Cpu1irq, sgintr, nil, "cpu1");
/* ... */
}
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;
}
/*
* entered from l.s with mmu enabled.
*
* we may have to realign the data segment; apparently 5l -H0 -R4096
* does not pad the text segment. on the other hand, we may have been
* loaded by another kernel.
*
* be careful not to touch the data segment until we know it's aligned.
*/
void
main(Mach* mach)
{
extern char bdata[], edata[], end[], etext[];
static ulong vfy = 0xcafebabe;
m = mach;
if (vfy != 0xcafebabe)
memmove(bdata, etext, edata - bdata);
if (vfy != 0xcafebabe) {
wave('?');
panic("misaligned data segment");
}
memset(edata, 0, end - edata); /* zero bss */
vfy = 0;
wave('9');
machinit();
archreset();
mmuinit();
optionsinit("/boot/boot boot");
quotefmtinstall();
archconsole();
wave(' ');
/* want plan9.ini to be able to affect memory sizing in confinit */
plan9iniinit(); /* before we step on plan9.ini in low memory */
/* set memsize before xinit */
confinit();
/* xinit would print if it could */
xinit();
/*
* Printinit will cause the first malloc call.
* (printinit->qopen->malloc) unless any of the
* above (like clockintr) do an irqenable, which
* will call malloc.
* If the system dies here it's probably due
* to malloc(->xalloc) not being initialised
* correctly, or the data segment is misaligned
* (it's amazing how far you can get with
* things like that completely broken).
*
* (Should be) boilerplate from here on.
*/
trapinit();
clockinit();
printinit();
uartkirkwoodconsole();
/* only now can we print */
print("from Bell Labs\n\n");
#ifdef CRYPTOSANDBOX
print("sandbox: 64K at physical %#lux, mapped to 0xf10b0000\n",
PADDR((uintptr)sandbox & ~(BY2PG-1)));
#endif
archconfinit();
cpuidprint();
timersinit();
procinit0();
initseg();
links();
chandevreset(); /* most devices are discovered here */
spiprobe();
pageinit();
swapinit();
userinit();
schedinit();
panic("schedinit returned");
}