#include "reboot.h"
Mach *m;
-
-/*
- * Where configuration info is left for the loaded programme.
- * This will turn into a structure as more is done by the boot loader
- * (e.g. why parse the .ini file twice?).
- * There are 3584 bytes available at CONFADDR.
- */
-#define BOOTLINE ((char*)CONFADDR)
-#define BOOTLINELEN 64
-#define BOOTARGS ((char*)(CONFADDR+BOOTLINELEN))
-#define BOOTARGSLEN (4096-0x200-BOOTLINELEN)
-#define MAXCONF 64
-
Conf conf;
-char *confname[MAXCONF];
-char *confval[MAXCONF];
-int nconf;
-char *sp; /* user stack of init proc */
+
int delaylink;
int idle_spin;
-static void
-multibootargs(void)
-{
- char *cp, *ep;
- ulong *m, l;
-
- extern ulong *multiboot;
-
- if(multiboot == nil)
- return;
-
- /* command line */
- if((multiboot[0] & (1<<2)) != 0)
- strncpy(BOOTLINE, KADDR(multiboot[4]), BOOTLINELEN-1);
-
- cp = BOOTARGS;
- ep = cp + BOOTARGSLEN-1;
-
- /* memory map */
- if((multiboot[0] & (1<<6)) != 0 && (l = multiboot[11]) >= 24){
- cp = seprint(cp, ep, "*e820=");
- m = KADDR(multiboot[12]);
- while(m[0] >= 20 && m[0] <= l-4){
- uvlong base, size;
- m++;
- base = ((uvlong)m[0] | (uvlong)m[1]<<32);
- size = ((uvlong)m[2] | (uvlong)m[3]<<32);
- cp = seprint(cp, ep, "%.1lux %.16llux %.16llux ",
- m[4] & 0xF, base, base+size);
- l -= m[-1]+4;
- m = (ulong*)((ulong)m + m[-1]);
- }
- cp[-1] = '\n';
- }
-
- /* plan9.ini passed as the first module */
- if((multiboot[0] & (1<<3)) != 0 && multiboot[5] > 0){
- m = KADDR(multiboot[6]);
- l = m[1] - m[0];
- m = KADDR(m[0]);
- if(cp+l > ep)
- l = ep - cp;
- memmove(cp, m, l);
- cp += l;
- }
- *cp = 0;
-}
-
-static void
-options(void)
-{
- long i, n;
- char *cp, *line[MAXCONF], *p, *q;
-
- multibootargs();
-
- /*
- * parse configuration args from dos file plan9.ini
- */
- cp = BOOTARGS; /* where b.com leaves its config */
- 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 == nil)
- continue;
- *cp++ = '\0';
- confname[nconf] = line[i];
- confval[nconf] = cp;
- nconf++;
- }
-}
-
extern void (*i8237alloc)(void);
extern void bootscreeninit(void);
+extern void multibootdebug(void);
void
main(void)
{
mach0init();
- options();
+ bootargsinit();
ioinit();
i8250console();
quotefmtinstall();
screeninit();
print("\nPlan 9\n");
-
+
trapinit0();
i8253init();
cpuidentify();
links();
chandevreset();
pageinit();
- swapinit();
userinit();
- active.thunderbirdsarego = 1;
schedinit();
}
void
init0(void)
{
- int i;
- char buf[2*KNAMELEN];
+ char buf[2*KNAMELEN], **sp;
up->nerrlab = 0;
ksetenv("service", "cpu", 0);
else
ksetenv("service", "terminal", 0);
- for(i = 0; i < nconf; i++){
- if(confname[i][0] != '*')
- ksetenv(confname[i], confval[i], 0);
- ksetenv(confname[i], confval[i], 1);
- }
+ setconfenv();
poperror();
}
kproc("alarm", alarmkproc, 0);
+
+ sp = (char**)(USTKTOP - sizeof(Tos) - 8 - sizeof(sp[0])*4);
+ sp[3] = sp[2] = nil;
+ strcpy(sp[1] = (char*)&sp[4], "boot");
+ sp[0] = nil;
touser(sp);
}
s = newseg(SG_STACK, USTKTOP-USTKSIZE, USTKSIZE/BY2PG);
p->seg[SSEG] = s;
pg = newpage(0, 0, USTKTOP-BY2PG);
+ segpage(s, pg);
v = tmpmap(pg);
memset(v, 0, BY2PG);
- segpage(s, pg);
- bootargs(v);
tmpunmap(v);
/*
ready(p);
}
-void
-bootargs(void *base)
-{
- char *argv[8];
- int i, argc;
-
-#define UA(ka) ((char*)(ka) + ((uintptr)(USTKTOP - BY2PG) - (uintptr)base))
- sp = (char*)base + BY2PG - sizeof(Tos);
-
- /* push boot command line onto the stack */
- sp -= BOOTLINELEN;
- sp[BOOTLINELEN-1] = '\0';
- memmove(sp, BOOTLINE, BOOTLINELEN-1);
-
- /* parse boot command line */
- argc = tokenize(sp, argv, nelem(argv));
- if(argc < 1){
- strcpy(sp, "boot");
- argc = 0;
- argv[argc++] = sp;
- }
-
- /* 4 byte word align stack */
- sp = (char*)((uintptr)sp & ~3);
-
- /* build argv on stack */
- sp -= (argc+1)*BY2WD;
- for(i=0; i<argc; i++)
- ((char**)sp)[i] = UA(argv[i]);
- ((char**)sp)[i] = nil;
-
- sp = UA(sp);
-#undef UA
- sp -= BY2WD;
-}
-
-char*
-getconf(char *name)
-{
- int i;
-
- for(i = 0; i < nconf; i++)
- if(cistrcmp(confname[i], name) == 0)
- return confval[i];
- return 0;
-}
-
-static void
-writeconf(void)
-{
- char *p, *q;
- int n;
-
- p = getconfenv();
-
- if(waserror()) {
- free(p);
- nexterror();
- }
-
- /* convert to name=value\n format */
- for(q=p; *q; q++) {
- q += strlen(q);
- *q = '=';
- q += strlen(q);
- *q = '\n';
- }
- n = q - p + 1;
- if(n >= BOOTARGSLEN)
- error("kernel configuration too large");
- memset(BOOTLINE, 0, BOOTLINELEN);
- memmove(BOOTARGS, p, n);
- poperror();
- free(p);
-}
-
void
confinit(void)
{
}
/*
- * we keep FPsave structure in sse format emulating FXSAVE / FXRSTOR
+ * we keep FPsave structure in SSE format emulating FXSAVE / FXRSTOR
* instructions for legacy x87 fpu.
- *
- * Note that fpx87restore() and fpxsserestore() do modify the FPsave
- * data structure for conversion / realignment shuffeling. this means
- * that p->fpsave is only valid when p->fpstate == FPinactive.
*/
void
fpx87save(FPsave *fps)
fpx87restore0(fps);
}
-/*
- * sse fp save and restore buffers have to be 16-byte (FPalign) aligned,
- * so we shuffle the data up and down as needed or make copies.
- */
-void
-fpssesave(FPsave *fps)
-{
- FPsave *afps;
-
- afps = (FPsave *)ROUND(((uintptr)fps), FPalign);
- fpssesave0(afps);
- if(fps != afps) /* not aligned? shuffle down from aligned buffer */
- memmove(fps, afps, sizeof(FPssestate) - FPalign);
-}
-
-void
-fpsserestore(FPsave *fps)
-{
- FPsave *afps;
-
- afps = (FPsave *)ROUND(((uintptr)fps), FPalign);
- if(fps != afps) /* shuffle up to make aligned */
- memmove(afps, fps, sizeof(FPssestate) - FPalign);
- fpsserestore0(afps);
-}
-
static char* mathmsg[] =
{
nil, /* handled below */
/*
* get floating point state to check out error
*/
- fpsave(&up->fpsave);
+ fpsave(up->fpsave);
up->fpstate = FPinactive;
- mathnote(up->fpsave.fsw, up->fpsave.fpuip);
+ mathnote(up->fpsave->fsw, up->fpsave->fpuip);
}
/*
static void
simderror(Ureg *ureg, void*)
{
- fpsave(&up->fpsave);
+ fpsave(up->fpsave);
up->fpstate = FPinactive;
- mathnote(up->fpsave.mxcsr & 0x3f, ureg->pc);
+ mathnote(up->fpsave->mxcsr & 0x3f, ureg->pc);
}
/*
case FPinit:
fpinit();
if(fpsave == fpssesave)
- ldmxcsr(0); /* no simd exceptions on 386 */
+ ldmxcsr(0x1f80); /* no simd exceptions on 386 */
+ while(up->fpsave == nil)
+ up->fpsave = mallocalign(sizeof(FPsave), FPalign, 0, 0);
up->fpstate = FPactive;
break;
case FPinactive:
* More attention should probably be paid here to the
* exception masks and error summary.
*/
- status = up->fpsave.fsw;
- control = up->fpsave.fcw;
+ status = up->fpsave->fsw;
+ control = up->fpsave->fcw;
if((status & ~control) & 0x07F){
- mathnote(status, up->fpsave.fpuip);
+ mathnote(status, up->fpsave->fpuip);
break;
}
- fprestore(&up->fpsave);
+ fprestore(up->fpsave);
up->fpstate = FPactive;
break;
case FPactive:
memset(p->gdt, 0, sizeof(p->gdt));
p->ldt = nil;
p->nldt = 0;
+
+ memset(p->dr, 0, sizeof(p->dr));
}
void
s = splhi();
switch(up->fpstate & ~FPillegal){
case FPactive:
- fpsave(&up->fpsave);
+ fpsave(up->fpsave);
up->fpstate = FPinactive;
case FPinactive:
- p->fpsave = up->fpsave;
+ while(p->fpsave == nil)
+ p->fpsave = mallocalign(sizeof(FPsave), FPalign, 0, 0);
+ memmove(p->fpsave, up->fpsave, sizeof(FPsave));
p->fpstate = FPinactive;
}
+
+ /* clear debug registers */
+ memset(p->dr, 0, sizeof(p->dr));
splx(s);
}
procrestore(Proc *p)
{
uvlong t;
+
+ if(p->dr[7] != 0){
+ m->dr7 = p->dr[7];
+ putdr(p->dr);
+ }
+
+ if(p->vmx != nil)
+ vmxprocrestore(p);
if(p->kp)
return;
procsave(Proc *p)
{
uvlong t;
+
+ /* we could just always putdr7(0) but accessing DR7 might be slow in a VM */
+ if(m->dr7 != 0){
+ m->dr7 = 0;
+ putdr7(0);
+ }
cycles(&t);
p->kentry -= t;
* until the process runs again and generates an
* emulation fault to activate the FPU.
*/
- fpsave(&p->fpsave);
+ fpsave(p->fpsave);
}
p->fpstate = FPinactive;
}
ulong *pdb;
writeconf();
+ vmxshutdown();
/*
* the boot processor is cpu0. execute this function on it