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#include "u.h"
#include "tos.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include "io.h"
#include "sysreg.h"
#include "rebootcode.i"
#include <pool.h>
#include <libsec.h>
Conf conf;
/*
* starting place for first process
*/
void
init0(void)
{
char buf[2*KNAMELEN], **sp;
chandevinit();
if(!waserror()){
snprint(buf, sizeof(buf), "%s %s", "ARM64", conffile);
ksetenv("terminal", buf, 0);
ksetenv("cputype", "arm64", 0);
if(cpuserver)
ksetenv("service", "cpu", 0);
else
ksetenv("service", "terminal", 0);
snprint(buf, sizeof(buf), "-a %s", getethermac());
ksetenv("etherargs", buf, 0);
/* convert plan9.ini variables to #e and #ec */
setconfenv();
poperror();
}
kproc("alarm", alarmkproc, 0);
sp = (char**)(USTKTOP-sizeof(Tos) - 8 - sizeof(sp[0])*4);
sp[3] = sp[2] = sp[1] = nil;
strcpy(sp[1] = (char*)&sp[4], "boot");
sp[0] = (void*)&sp[1];
touser((uintptr)sp);
}
void
confinit(void)
{
int userpcnt;
ulong kpages;
char *p;
int i;
if(p = getconf("service")){
if(strcmp(p, "cpu") == 0)
cpuserver = 1;
else if(strcmp(p,"terminal") == 0)
cpuserver = 0;
}
if(p = getconf("*kernelpercent"))
userpcnt = 100 - strtol(p, 0, 0);
else
userpcnt = 0;
if(userpcnt < 10)
userpcnt = 60 + cpuserver*10;
conf.npage = 0;
for(i = 0; i < nelem(conf.mem); i++)
conf.npage += conf.mem[i].npage;
kpages = conf.npage - (conf.npage*userpcnt)/100;
/*
* can't go past the end of virtual memory
* (uintptr)-KZERO is 2^32 - KZERO
*/
if(kpages > ((uintptr)-KZERO)/BY2PG)
kpages = ((uintptr)-KZERO)/BY2PG;
conf.upages = conf.npage - kpages;
conf.ialloc = (kpages/2)*BY2PG;
conf.nmach = getncpus();
/* set up other configuration parameters */
conf.nproc = 100 + ((conf.npage*BY2PG)/MB)*5;
if(cpuserver)
conf.nproc *= 3;
if(conf.nproc > 4000)
conf.nproc = 4000;
conf.nswap = conf.npage*3;
conf.nswppo = 4096;
conf.nimage = 200;
conf.copymode = conf.nmach > 1;
/*
* Guess how much is taken by the large permanent
* datastructures. Mntcache and Mntrpc are not accounted for.
*/
kpages = conf.npage - conf.upages;
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;
}
void
machinit(void)
{
m->ticks = 1;
m->perf.period = 1;
active.machs[m->machno] = 1;
}
void
mpinit(void)
{
extern void _start(void);
int i;
for(i = 1; i < conf.nmach; i++){
MACHP(i)->machno = i;
cachedwbinvse(MACHP(i), MACHSIZE);
}
for(i = 0; i < MAXMACH; i++)
((uintptr*)SPINTABLE)[i] = i < conf.nmach ? PADDR(_start) : 0;
cachedwbinvse((void*)SPINTABLE, MAXMACH*8);
sev();
delay(100);
sev();
synccycles();
for(i = 0; i < MAXMACH; i++)
((uintptr*)SPINTABLE)[i] = 0;
}
void
main(uintptr arg0)
{
machinit();
if(m->machno){
trapinit();
fpuinit();
clockinit();
cpuidprint();
synccycles();
timersinit();
flushtlb();
mmu1init();
m->ticks = MACHP(0)->ticks;
schedinit();
return;
}
quotefmtinstall();
bootargsinit(arg0);
meminit();
confinit();
xinit();
printinit();
uartconsinit();
screeninit();
print("\nPlan 9\n");
/* set clock rate to arm_freq from config.txt */
setclkrate(ClkArm, 0);
trapinit();
fpuinit();
vgpinit();
clockinit();
cpuidprint();
timersinit();
pageinit();
procinit0();
initseg();
links();
chandevreset();
userinit();
mpinit();
mmu0clear((uintptr*)L1);
flushtlb();
mmu1init();
schedinit();
}
static void
rebootjump(void *entry, void *code, ulong size)
{
void (*f)(void*, void*, ulong);
intrcpushutdown();
/* redo identity map */
mmuidmap((uintptr*)L1);
/* setup reboot trampoline function */
f = (void*)REBOOTADDR;
memmove(f, rebootcode, sizeof(rebootcode));
cachedwbinvse(f, sizeof(rebootcode));
cacheiinvse(f, sizeof(rebootcode));
(*f)(entry, code, size);
for(;;);
}
void
exit(int)
{
cpushutdown();
splfhi();
if(m->machno == 0)
archreboot();
rebootjump(0, 0, 0);
}
void
reboot(void *entry, void *code, ulong size)
{
writeconf();
while(m->machno != 0){
procwired(up, 0);
sched();
}
cpushutdown();
delay(2000);
splfhi();
/* turn off buffered serial console */
serialoq = nil;
/* shutdown devices */
chandevshutdown();
/* stop the clock (and watchdog if any) */
clockshutdown();
wdogoff();
intrsoff();
/* off we go - never to return */
rebootjump(entry, code, size);
}
/*
* stub for ../omap/devether.c
*/
int
isaconfig(char *, int, ISAConf *)
{
return 0;
}
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