## diffname pc/devarch.c 1999/0820
## diff -e /dev/null /n/emeliedump/1999/0820/sys/src/brazil/pc/devarch.c
0a
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "ureg.h"
#include "../port/error.h"
typedef struct IOMap IOMap;
struct IOMap
{
IOMap *next;
char tag[13];
ulong start;
ulong end;
};
static struct
{
Lock;
IOMap *m;
IOMap *free;
IOMap maps[32]; // some initial free maps
QLock ql; // lock for reading map
} iomap;
enum {
Qdir,
Qcputype,
Qioalloc,
Qiob,
Qiow,
Qiol,
Qirqalloc,
};
static Dirtab ioallocdir[] = {
"cputype", { Qcputype, 0 }, 0, 0444,
"ioalloc", { Qioalloc, 0 }, 0, 0444,
"iob", { Qiob, 0 }, 0, 0660,
"iow", { Qiow, 0 }, 0, 0660,
"iol", { Qiol, 0 }, 0, 0660,
"irqalloc", { Qirqalloc, 0}, 0, 0444,
};
void
ioinit(void)
{
int i;
for(i = 0; i < nelem(iomap.maps)-1; i++)
iomap.maps[i].next = &iomap.maps[i+1];
iomap.maps[i].next = nil;
iomap.free = iomap.maps;
// a dummy entry at 2^16
ioalloc(0x1000000, 1, 0, "dummy");
}
static long cputyperead(char*, int, ulong);
//
// alloc some io port space and remember who it was
// alloced to. if port < 0, find a free region.
//
int
ioalloc(int port, int size, int align, char *tag)
{
IOMap *m, **l;
int i;
lock(&iomap);
if(port < 0){
// find a free port above 0x400 and below 0x1000
port = 0x400;
for(l = &iomap.m; *l; l = &(*l)->next){
m = *l;
i = m->start - port;
if(i > size)
break;
if(align > 0)
port = ((port+align-1)/align)*align;
else
port = m->end;
}
if(*l == nil){
unlock(&iomap);
return -1;
}
} else {
// see if the space clashes with previously alllocated ports
for(l = &iomap.m; *l; l = &(*l)->next){
m = *l;
if(m->end <= port)
continue;
if(m->start >= port+size)
break;
unlock(&iomap);
return -1;
}
}
m = iomap.free;
if(m == nil){
print("ioalloc: out of maps");
unlock(&iomap);
return port;
}
iomap.free = m->next;
m->next = *l;
m->start = port;
m->end = port + size;
strncpy(m->tag, tag, sizeof(m->tag));
m->tag[sizeof(m->tag)-1] = 0;
*l = m;
ioallocdir[0].qid.vers++;
unlock(&iomap);
return m->start;
}
void
iofree(int port)
{
IOMap *m, **l;
lock(&iomap);
for(l = &iomap.m; *l; l = &(*l)->next){
if((*l)->start == port){
m = *l;
*l = m->next;
m->next = iomap.free;
iomap.free = m;
break;
}
if((*l)->start > port)
break;
}
ioallocdir[0].qid.vers++;
unlock(&iomap);
}
int
iounused(int start, int end)
{
IOMap *m;
for(m = iomap.m; m; m = m->next){
if(start >= m->start && start < m->end
|| start <= m->start && end > m->start)
return 0;
}
return 1;
}
static void
checkport(int start, int end)
{
/* standard vga regs are OK */
if(start >= 0x2b0 && end <= 0x2df+1)
return;
if(start >= 0x3c0 && end <= 0x3da+1)
return;
if(iounused(start, end))
return;
error(Eperm);
}
static Chan*
archattach(char* spec)
{
return devattach('P', spec);
}
int
archwalk(Chan* c, char* name)
{
return devwalk(c, name, ioallocdir, nelem(ioallocdir), devgen);
}
static void
archstat(Chan* c, char* dp)
{
devstat(c, dp, ioallocdir, nelem(ioallocdir), devgen);
}
static Chan*
archopen(Chan* c, int omode)
{
return devopen(c, omode, ioallocdir, nelem(ioallocdir), devgen);
}
static void
archclose(Chan*)
{
}
enum
{
Linelen= 31,
};
static long
archread(Chan *c, void *a, long n, vlong offset)
{
char *p;
IOMap *m;
char buf[Linelen+1];
int port;
ushort *sp;
ulong *lp;
switch(c->qid.path & ~CHDIR){
case Qdir:
return devdirread(c, a, n, ioallocdir, nelem(ioallocdir), devgen);
case Qiob:
port = offset;
checkport(offset, offset+n);
for(p = a; port < offset+n; port++)
*p++ = inb(port);
return n;
case Qiow:
if((n & 0x01) || (offset & 0x01))
error(Ebadarg);
checkport(offset, offset+n+1);
n /= 2;
sp = a;
for(port = offset; port < offset+n; port += 2)
*sp++ = ins(port);
return n*2;
case Qiol:
if((n & 0x03) || (offset & 0x03))
error(Ebadarg);
checkport(offset, offset+n+3);
n /= 4;
lp = a;
for(port = offset; port < offset+n; port += 4)
*lp++ = inl(port);
return n*4;
case Qioalloc:
break;
case Qirqalloc:
return irqallocread(a, n, offset);
case Qcputype:
return cputyperead(a, n, offset);
default:
error(Eperm);
break;
}
offset = offset/Linelen;
n = n/Linelen;
p = a;
lock(&iomap);
for(m = iomap.m; n > 0 && m != nil; m = m->next){
if(offset-- > 0)
continue;
if(strcmp(m->tag, "dummy") == 0)
break;
sprint(buf, "%8lux %8lux %-12.12s\n", m->start, m->end-1, m->tag);
memmove(p, buf, Linelen);
p += Linelen;
n--;
}
unlock(&iomap);
return p - (char*)a;
}
static long
archwrite(Chan *c, void *a, long n, vlong offset)
{
int port;
ushort *sp;
ulong *lp;
char *p;
switch(c->qid.path & ~CHDIR){
case Qiob:
p = a;
checkport(offset, offset+n);
for(port = offset; port < offset+n; port++)
outb(port, *p++);
return n;
case Qiow:
if((n & 01) || (offset & 01))
error(Ebadarg);
checkport(offset, offset+n+1);
n /= 2;
sp = a;
for(port = offset; port < offset+n; port += 2)
outs(port, *sp++);
return n*2;
case Qiol:
if((n & 0x03) || (offset & 0x03))
error(Ebadarg);
checkport(offset, offset+n+3);
n /= 4;
lp = a;
for(port = offset; port < offset+n; port += 4)
outl(port, *lp++);
return n*4;
default:
error(Eperm);
break;
}
return 0;
}
Dev archdevtab = {
'P',
"arch",
devreset,
devinit,
archattach,
devclone,
archwalk,
archstat,
archopen,
devcreate,
archclose,
archread,
devbread,
archwrite,
devbwrite,
devremove,
devwstat,
};
/*
* the following is a generic version of the
* architecture specific stuff
*/
static int
unimplemented(int)
{
return 0;
}
static void
nop(void)
{
}
void (*coherence)(void) = nop;
void cycletimerinit(void);
uvlong cycletimer(uvlong*);
PCArch* arch;
extern PCArch* knownarch[];
PCArch archgeneric = {
"generic", /* id */
0, /* ident */
i8042reset, /* reset */
unimplemented, /* serialpower */
unimplemented, /* modempower */
i8259init, /* intrinit */
i8259enable, /* intrenable */
i8253enable, /* clockenable */
i8253read, /* read the standard timer */
};
typedef struct {
int family;
int model;
int aalcycles;
char* name;
} X86type;
static X86type x86intel[] =
{
{ 4, 0, 22, "486DX", }, /* known chips */
{ 4, 1, 22, "486DX50", },
{ 4, 2, 22, "486SX", },
{ 4, 3, 22, "486DX2", },
{ 4, 4, 22, "486SL", },
{ 4, 5, 22, "486SX2", },
{ 4, 7, 22, "DX2WB", }, /* P24D */
{ 4, 8, 22, "DX4", }, /* P24C */
{ 4, 9, 22, "DX4WB", }, /* P24CT */
{ 5, 0, 23, "P5", },
{ 5, 1, 23, "P5", },
{ 5, 2, 23, "P54C", },
{ 5, 3, 23, "P24T", },
{ 5, 4, 23, "P55C MMX", },
{ 5, 7, 23, "P54C VRT", },
{ 6, 1, 16, "PentiumPro", },/* determined by trial and error */
{ 6, 3, 16, "PentiumII", },
{ 6, 5, 16, "PentiumII/Xeon", },
{ 3, -1, 32, "386", }, /* family defaults */
{ 4, -1, 22, "486", },
{ 5, -1, 23, "P5", },
{ 6, -1, 16, "P6", },
{ -1, -1, 23, "unknown", }, /* total default */
};
/*
* The AMD processors all implement the CPUID instruction.
* The later ones also return the processor name via functions
* 0x80000002, 0x80000003 and 0x80000004 in registers AX, BX, CX
* and DX:
* K5 "AMD-K5(tm) Processor"
* K6 "AMD-K6tm w/ multimedia extensions"
* K6 3D "AMD-K6(tm) 3D processor"
* K6 3D+ ?
*/
static X86type x86amd[] =
{
{ 5, 0, 23, "AMD-K5", }, /* guesswork */
{ 5, 1, 23, "AMD-K5", }, /* guesswork */
{ 5, 2, 23, "AMD-K5", }, /* guesswork */
{ 5, 3, 23, "AMD-K5", }, /* guesswork */
{ 5, 6, 11, "AMD-K6", }, /* determined by trial and error */
{ 5, 7, 11, "AMD-K6", }, /* determined by trial and error */
{ 5, 8, 11, "AMD-K6 3D", }, /* guesswork */
{ 5, 9, 11, "AMD-K6 3D+", },/* guesswork */
{ 4, -1, 22, "Am486", }, /* guesswork */
{ 5, -1, 23, "AMD-K5/K6", }, /* guesswork */
{ -1, -1, 23, "unknown", }, /* total default */
};
static uvlong fasthz;
static X86type *cputype;
void
cpuidprint(void)
{
int i;
char buf[128];
i = sprint(buf, "cpu%d: %dMHz ", m->machno, m->cpumhz);
if(m->cpuidid[0])
i += sprint(buf+i, "%s ", m->cpuidid);
sprint(buf+i, "%s (cpuid: AX 0x%4.4uX DX 0x%4.4uX)\n",
m->cpuidtype, m->cpuidax, m->cpuiddx);
print(buf);
}
int
cpuidentify(void)
{
int family, model;
X86type *t;
ulong cr4;
vlong mct;
cpuid(m->cpuidid, &m->cpuidax, &m->cpuiddx);
if(strncmp(m->cpuidid, "AuthenticAMD", 12) == 0)
t = x86amd;
else
t = x86intel;
family = X86FAMILY(m->cpuidax);
model = X86MODEL(m->cpuidax);
while(t->name){
if((t->family == family && t->model == model)
|| (t->family == family && t->model == -1)
|| (t->family == -1))
break;
t++;
}
m->cpuidtype = t->name;
i8253init(t->aalcycles, t->family >= 5);
/*
* If machine check exception or page size extensions are supported
* enable them in CR4 and clear any other set extensions.
* If machine check was enabled clear out any lingering status.
*/
if(m->cpuiddx & 0x88){
cr4 = 0;
if(m->cpuiddx & 0x08)
cr4 |= 0x10; /* page size extensions */
if(m->cpuiddx & 0x80)
cr4 |= 0x40; /* machine check enable */
putcr4(cr4);
if(m->cpuiddx & 0x80)
rdmsr(0x01, &mct);
}
cputype = t;
return t->family;
}
static long
cputyperead(char *a, int n, ulong offset)
{
char str[32];
ulong mhz;
mhz = (m->cpuhz+999999)/1000000;
snprint(str, sizeof(str), "%s %lud\n", cputype->name, mhz);
return readstr(offset, a, n, str);
}
void
archinit(void)
{
PCArch **p;
arch = 0;
for(p = knownarch; *p; p++){
if((*p)->ident && (*p)->ident() == 0){
arch = *p;
break;
}
}
if(arch == 0)
arch = &archgeneric;
else{
if(arch->id == 0)
arch->id = archgeneric.id;
if(arch->reset == 0)
arch->reset = archgeneric.reset;
if(arch->serialpower == 0)
arch->serialpower = archgeneric.serialpower;
if(arch->modempower == 0)
arch->modempower = archgeneric.modempower;
if(arch->intrinit == 0)
arch->intrinit = archgeneric.intrinit;
if(arch->intrenable == 0)
arch->intrenable = archgeneric.intrenable;
}
/* pick the better timer */
if(X86FAMILY(m->cpuidax) >= 5){
cycletimerinit();
arch->fastclock = cycletimer;
}
/*
* Decide whether to use copy-on-reference (386 and mp).
*/
if(X86FAMILY(m->cpuidax) == 3 || conf.nmach > 1)
conf.copymode = 1;
if(X86FAMILY(m->cpuidax) >= 5)
coherence = wbflush;
}
void
cycletimerinit(void)
{
wrmsr(0x10, 0);
fasthz = m->cpuhz;
}
/*
* return the most precise clock we have
*/
uvlong
cycletimer(uvlong *hz)
{
uvlong tsc;
rdmsr(0x10, (vlong*)&tsc);
m->fastclock = tsc;
if(hz != nil)
*hz = fasthz;
return tsc;
}
vlong
fastticks(uvlong *hz)
{
return (*arch->fastclock)(hz);
}
.
## diffname pc/devarch.c 1999/0908
## diff -e /n/emeliedump/1999/0820/sys/src/brazil/pc/devarch.c /n/emeliedump/1999/0908/sys/src/brazil/pc/devarch.c
94c
// see if the space clashes with previously allocated ports
.
## diffname pc/devarch.c 1999/1001
## diff -e /n/emeliedump/1999/0908/sys/src/brazil/pc/devarch.c /n/emeliedump/1999/1001/sys/src/brazil/pc/devarch.c
411a
{ 6, 7, 16, "PentiumIII/Xeon", },
.
## diffname pc/devarch.c 1999/1019
## diff -e /n/emeliedump/1999/1001/sys/src/brazil/pc/devarch.c /n/emeliedump/1999/1019/sys/src/brazil/pc/devarch.c
60c
ioalloc(0x10000, 1, 0, "dummy");
.
## diffname pc/devarch.c 2000/0208
## diff -e /n/emeliedump/1999/1019/sys/src/brazil/pc/devarch.c /n/emeliedump/2000/0208/sys/src/9/pc/devarch.c
411a
{ 6, 6, 16, "Celeron", },
.
## diffname pc/devarch.c 2000/0211
## diff -e /n/emeliedump/2000/0208/sys/src/9/pc/devarch.c /n/emeliedump/2000/0211/sys/src/9/pc/devarch.c
443a
{ 6, 1, 11, "AMD-Athlon", },
.
## diffname pc/devarch.c 2000/0222
## diff -e /n/emeliedump/2000/0211/sys/src/9/pc/devarch.c /n/emeliedump/2000/0222/sys/src/9/pc/devarch.c
444c
{ 6, 1, 11, "AMD-Athlon", },/* trial and error */
{ 6, 2, 11, "AMD-Athlon", },/* trial and error */
.
439,442c
{ 5, 6, 11, "AMD-K6", }, /* trial and error */
{ 5, 7, 11, "AMD-K6", }, /* trial and error */
{ 5, 8, 11, "AMD-K6-2", }, /* trial and error */
{ 5, 9, 11, "AMD-K6-III", },/* trial and error */
.
408a
{ 5, 8, 11, "AMD-K6 3D", }, /* Kenji Arisawa [email protected] */
{ 5, 9, 11, "AMD-K6 3D+", },/* Kenji Arisawa [email protected] */
.
## diffname pc/devarch.c 2000/0421
## diff -e /n/emeliedump/2000/0222/sys/src/9/pc/devarch.c /n/emeliedump/2000/0421/sys/src/9/pc/devarch.c
450a
{ 6, -1, 11, "AMD-Athlon", },/* guesswork */
.
415a
{ 6, 8, 16, "PentiumIII/Xeon", },
.
409,411c
{ 6, 1, 16, "PentiumPro", },/* trial and error */
.
## diffname pc/devarch.c 2000/0622
## diff -e /n/emeliedump/2000/0421/sys/src/9/pc/devarch.c /n/emeliedump/2000/0622/sys/src/9/pc/devarch.c
593a
rdmsr(0x10, (vlong*)&tsc);
m->fastclock = tsc;
.
590,591d
## diffname pc/devarch.c 2000/0907
## diff -e /n/emeliedump/2000/0622/sys/src/9/pc/devarch.c /n/emeliedump/2000/0907/sys/src/9/pc/devarch.c
482a
else if(strncmp(m->cpuidid, "CentaurHauls", 12) == 0)
t = x86winchip;
.
454a
/*
* WinChip 240MHz
*/
static X86type x86winchip[] =
{
{5, 4, 23, "Winchip",}, /* guesswork */
{ -1, -1, 23, "unknown", }, /* total default */
};
.
## diffname pc/devarch.c 2000/0922
## diff -e /n/emeliedump/2000/0907/sys/src/9/pc/devarch.c /n/emeliedump/2000/0922/sys/src/9/pc/devarch.c
519a
if(family == 5){
rdmsr(0x00, &mca);
rdmsr(0x01, &mct);
}
}
.
518c
if(p = getconf("*nomce"))
nomce = strtoul(p, 0, 0);
else
nomce = 0;
if((m->cpuiddx & 0x80) && !nomce){
.
488c
vlong mca, mct;
.
485c
char *p;
int family, model, nomce;
.
## diffname pc/devarch.c 2000/1018
## diff -e /n/emeliedump/2000/0922/sys/src/9/pc/devarch.c /n/emeliedump/2000/1018/sys/src/9/pc/devarch.c
594a
addarchfile("cputype", 0444, cputyperead, nil);
.
540c
cputyperead(Chan*, void *a, long n, vlong offset)
.
319a
if(c->qid.path < narchdir && (fn = writefn[c->qid.path]))
return fn(c, a, n, offset);
.
288c
Rdwrfn *fn;
.
284a
char *p;
.
258a
if(c->qid.path < narchdir && (fn = readfn[c->qid.path]))
return fn(c, a, n, offset);
.
252,257d
220c
return devdirread(c, a, n, archdir, narchdir, devgen);
.
217c
switch(c->qid.path){
.
215a
IOMap *m;
Rdwrfn *fn;
.
210,212c
char buf[Linelen+1], *p;
.
194c
return devopen(c, omode, archdir, narchdir, devgen);
.
188c
devstat(c, dp, archdir, narchdir, devgen);
.
182c
return devwalk(c, name, archdir, narchdir, devgen);
.
142c
archdir[0].qid.vers++;
.
119c
archdir[0].qid.vers++;
.
63,64d
48a
/*
* Add a file to the #P listing. Once added, you can't delete it.
* You can't add a file with the same name as one already there,
* and you get a pointer to the Dirtab entry so you can do things
* like change the Qid version. Changing the Qid path is disallowed.
*/
Dirtab*
addarchfile(char *name, int perm, Rdwrfn *rdfn, Rdwrfn *wrfn)
{
int i;
Dirtab d;
Dirtab *dp;
memset(&d, 0, sizeof d);
strcpy(d.name, name);
d.perm = perm;
lock(&archwlock);
if(narchdir >= Qmax){
unlock(&archwlock);
return nil;
}
for(i=0; i<narchdir; i++)
if(strcmp(archdir[i].name, name) == 0){
unlock(&archwlock);
return nil;
}
d.qid.path = narchdir;
archdir[narchdir] = d;
readfn[narchdir] = rdfn;
writefn[narchdir] = wrfn;
dp = &archdir[narchdir++];
unlock(&archwlock);
return dp;
}
.
47a
Lock archwlock; /* the lock is only for changing archdir */
int narchdir = Qbase;
.
46d
40,41c
typedef long Rdwrfn(Chan*, void*, long, vlong);
static Rdwrfn *readfn[Qmax];
static Rdwrfn *writefn[Qmax];
static Dirtab archdir[Qmax] = {
.
37c
Qbase,
Qmax = 16,
.
31,33c
Qdir = CHDIR,
Qioalloc = 0,
.
10d
## diffname pc/devarch.c 2000/1102
## diff -e /n/emeliedump/2000/1018/sys/src/9/pc/devarch.c /n/emeliedump/2000/1102/sys/src/9/pc/devarch.c
351c
checkport(offset, offset+n);
.
341c
checkport(offset, offset+n);
.
284c
checkport(offset, offset+n);
.
274c
checkport(offset, offset+n);
.
## diffname pc/devarch.c 2001/0510
## diff -e /n/emeliedump/2000/1102/sys/src/9/pc/devarch.c /n/emeliedump/2001/0510/sys/src/9/pc/devarch.c
135a
// Only 64KB I/O space on the x86.
if((port+size) >= 0x10000){
unlock(&iomap);
return -1;
}
.
## diffname pc/devarch.c 2001/0527
## diff -e /n/emeliedump/2001/0510/sys/src/9/pc/devarch.c /n/emeliedump/2001/0527/sys/src/9/pc/devarch.c
379d
334c
switch((ulong)c->qid.path){
.
264c
switch((ulong)c->qid.path){
.
235c
return devstat(c, dp, n, archdir, narchdir, devgen);
.
232,233c
static int
archstat(Chan* c, uchar* dp, int n)
.
229c
return devwalk(c, nc, name, nname, archdir, narchdir, devgen);
.
226,227c
Walkqid*
archwalk(Chan* c, Chan *nc, char** name, int nname)
.
45a
".", { Qdir, 0, QTDIR }, 0, 0555,
.
30,31c
Qdir = 0,
Qioalloc = 1,
.
## diffname pc/devarch.c 2001/0622
## diff -e /n/emeliedump/2001/0527/sys/src/9/pc/devarch.c /n/emeliedump/2001/0622/sys/src/9/pc/devarch.c
146a
if(m->reserved && m->start == port && m->end == port + size) {
m->reserved = 0;
unlock(&iomap);
return m->start;
}
.
123a
if (m->start < 0x400) continue;
.
107a
// Reserve a range to be ioalloced later. This is in particular useful for exchangable cards, such
// as pcmcia and cardbus cards.
int
ioreserve(int port, int size, int align, char *tag)
{
IOMap *m, **l;
int i;
lock(&iomap);
// find a free port above 0x400 and below 0x1000
port = 0x400;
for(l = &iomap.m; *l; l = &(*l)->next){
m = *l;
if (m->start < 0x400) continue;
i = m->start - port;
if(i > size)
break;
if(align > 0)
port = ((port+align-1)/align)*align;
else
port = m->end;
}
if(*l == nil){
unlock(&iomap);
return -1;
}
m = iomap.free;
if(m == nil){
print("ioalloc: out of maps");
unlock(&iomap);
return port;
}
iomap.free = m->next;
m->next = *l;
m->start = port;
m->end = port + size;
m->reserved = 1;
strncpy(m->tag, tag, sizeof(m->tag));
m->tag[sizeof(m->tag)-1] = 0;
*l = m;
archdir[0].qid.vers++;
unlock(&iomap);
return m->start;
}
.
105a
ioalloc(0x1000, 1, 0, "dummy");
.
13a
int reserved;
.
## diffname pc/devarch.c 2001/0809
## diff -e /n/emeliedump/2001/0622/sys/src/9/pc/devarch.c /n/emeliedump/2001/0809/sys/src/9/pc/devarch.c
107d
## diffname pc/devarch.c 2001/0905
## diff -e /n/emeliedump/2001/0809/sys/src/9/pc/devarch.c /n/emeliedump/2001/0905/sys/src/9/pc/devarch.c
724a
}
int
pcmspecial(char *idstr, ISAConf *isa)
{
return (_pcmspecial != nil)? _pcmspecial(idstr, isa): -1;
}
void
pcmspecialclose(int a)
{
if (_pcmspecialclose != nil)
_pcmspecialclose(a);
.
478a
i8259vecno, /* vector number */
i8259disable, /* intrdisable */
.
55a
.
54a
int (*_pcmspecial)(char *, ISAConf *);
void (*_pcmspecialclose)(int);
.
## diffname pc/devarch.c 2001/0925
## diff -e /n/emeliedump/2001/0905/sys/src/9/pc/devarch.c /n/emeliedump/2001/0925/sys/src/9/pc/devarch.c
109a
ioalloc(0x1000, 1, 0, "dummy");
.
## diffname pc/devarch.c 2001/0926
## diff -e /n/emeliedump/2001/0925/sys/src/9/pc/devarch.c /n/emeliedump/2001/0926/sys/src/9/pc/devarch.c
110c
ioalloc(0x0fff, 1, 0, "dummy"); // i82557 is at 0x1000, the dummy
// entry is needed for swappable devs.
.
## diffname pc/devarch.c 2001/1003
## diff -e /n/emeliedump/2001/0926/sys/src/9/pc/devarch.c /n/emeliedump/2001/1003/sys/src/9/pc/devarch.c
111a
if ((excluded = getconf("ioexclude")) != nil) {
char *s;
s = excluded;
while (s && *s != '\0' && *s != '\n') {
char *ends;
int io_s, io_e;
io_s = (int)strtol(s, &ends, 0);
if (ends == nil || ends == s || *ends != '-') {
print("ioinit: cannot parse option string\n");
break;
}
s = ++ends;
io_e = (int)strtol(s, &ends, 0);
if (ends && *ends == ',')
*ends++ = '\0';
s = ends;
ioalloc(io_s, io_e - io_s + 1, 0, "pre-allocated");
}
}
.
100a
char *excluded;
.
## diffname pc/devarch.c 2001/1014
## diff -e /n/emeliedump/2001/1003/sys/src/9/pc/devarch.c /n/emeliedump/2001/1014/sys/src/9/pc/devarch.c
373c
if(n & 3)
.
363c
if(n & 1)
.
## diffname pc/devarch.c 2001/1130
## diff -e /n/emeliedump/2001/1014/sys/src/9/pc/devarch.c /n/emeliedump/2001/1130/sys/src/9/pc/devarch.c
749c
rdtsc((vlong*)&tsc);
.
## diffname pc/devarch.c 2002/0109
## diff -e /n/emeliedump/2001/1130/sys/src/9/pc/devarch.c /n/emeliedump/2002/0109/sys/src/9/pc/devarch.c
463a
devshutdown,
.
## diffname pc/devarch.c 2002/0221
## diff -e /n/emeliedump/2002/0109/sys/src/9/pc/devarch.c /n/emeliedump/2002/0221/sys/src/9/pc/devarch.c
553a
{ 0xF, -1, 16, "P4", }, /* P4 */
.
548a
{ 0xF, 1, 16, "P4", }, /* P4 */
.
## diffname pc/devarch.c 2002/0404
## diff -e /n/emeliedump/2002/0221/sys/src/9/pc/devarch.c /n/emeliedump/2002/0404/sys/src/9/pc/devarch.c
447c
return n;
.
443d
440c
if(n & 3)
.
437c
return n;
.
433d
430c
if(n & 1)
.
380c
return n;
.
376d
370c
return n;
.
366d
## diffname pc/devarch.c 2002/0405
## diff -e /n/emeliedump/2002/0404/sys/src/9/pc/devarch.c /n/emeliedump/2002/0405/sys/src/9/pc/devarch.c
764a
/*
* call either the pcmcia or pccard device teardown
*/
.
741,758d
739c
* call either the pcmcia or pccard device setup
.
731,737d
713,718d
710a
if(arch->intrenable == 0)
arch->intrenable = archgeneric.intrenable;
.
706d
642a
* if there is one, set tsc to a known value
*/
m->havetsc = t->family >= 5;
if(m->havetsc)
wrmsr(0x10, 0);
/*
* use i8253 to guess our cpu speed
*/
guesscpuhz(t->aalcycles);
/*
.
640d
613a
/*
* figure out:
* - cpu type
* - whether or not we have a TSC (cycle counter)
* - whether or not is supports page size extensions
* (if so turn it on)
* - whether or not is supports machine check exceptions
* (if so turn it on)
*/
.
597d
492,493d
## diffname pc/devarch.c 2002/0409
## diff -e /n/emeliedump/2002/0405/sys/src/9/pc/devarch.c /n/emeliedump/2002/0409/sys/src/9/pc/devarch.c
737c
if(X86FAMILY(m->cpuidax) >= 5 && conf.nmach > 1)
.
## diffname pc/devarch.c 2002/0410
## diff -e /n/emeliedump/2002/0409/sys/src/9/pc/devarch.c /n/emeliedump/2002/0410/sys/src/9/pc/devarch.c
759a
}
/*
* return value and speed of timer set in arch->clockenable
*/
uvlong
fastticks(uvlong *hz)
{
return (*arch->fastclock)(hz);
}
/*
* set next timer interrupt
*/
void
timerset(uvlong x)
{
(*arch->timerset)(x);
.
727,728d
683a
if(t->family >= 6){
cr4 = getcr4();
cr4 |= 0x80; /* page global enable bit */
putcr4(cr4);
}
.
510a
i8253timerset,
.
## diffname pc/devarch.c 2002/0411
## diff -e /n/emeliedump/2002/0410/sys/src/9/pc/devarch.c /n/emeliedump/2002/0411/sys/src/9/pc/devarch.c
741,743d
739c
if(X86FAMILY(m->cpuidax) == 3)
.
737c
* Decide whether to use copy-on-reference (386 and mp).
* We get another chance to set it in mpinit() for a
* multiprocessor.
.
## diffname pc/devarch.c 2002/0412
## diff -e /n/emeliedump/2002/0411/sys/src/9/pc/devarch.c /n/emeliedump/2002/0412/sys/src/9/pc/devarch.c
744a
addarchfile("pge", 0664, pgeread, pgewrite);
.
706a
static long
pgewrite(Chan*, void *a, long n, vlong)
{
if(!m->havepge)
error("processor does not support pge");
if(n==3 && memcmp(a, "off", 3)==0){
putcr4(getcr4() & ~0x80);
return n;
}
if(n==2 && memcmp(a, "on", 2)==0){
putcr4(getcr4() | 0x80);
return n;
}
error("invalid control message");
return -1;
}
static long
pgeread(Chan*, void *a, long n, vlong offset)
{
if(n < 16)
error("need more room");
if(offset)
return 0;
n = snprint(a, n, "%s pge; %s", m->havepge ? "have" : "no", getcr4()&0x80 ? "on" : "off");
return n;
}
.
688a
m->havepge = 1;
.
685c
/*
* Detect whether the chip supports the global bit
* in page directory and page table entries. When set
* in a particular entry, it means ``don't bother removing
* this from the TLB when CR3 changes.''
*
* We flag all kernel pages with this bit. Doing so lessens the
* overhead of switching processes on bare hardware,
* even more so on VMware. See mmu.c:/^memglobal.
*
* This feature exists on Intel Pentium Pro and later
* processors. Presumably the AMD processors have
* a similar notion, but I can't find it in the meager
* documentation I've tried.
*
* For future reference, should we ever need to do a
* full TLB flush, it can be accomplished by clearing
* the PGE bit in CR4, writing to CR3, and then
* restoring the PGE bit.
*/
if(tab==x86intel && t->family >= 6){
.
644,645c
.
639c
for(t=tab; t->name; t++)
.
636c
tab = x86intel;
.
634c
tab = x86winchip;
.
632c
tab = x86amd;
.
626c
X86type *t, *tab;
.
## diffname pc/devarch.c 2002/0413
## diff -e /n/emeliedump/2002/0412/sys/src/9/pc/devarch.c /n/emeliedump/2002/0413/sys/src/9/pc/devarch.c
793a
// if(X86FAMILY(m->cpuidax) >= 5 && conf.nmach > 1)
coherence = wbflush;
.
## diffname pc/devarch.c 2002/0531
## diff -e /n/emeliedump/2002/0413/sys/src/9/pc/devarch.c /n/emeliedump/2002/0531/sys/src/9/pc/devarch.c
543a
{ 6, 0xB, 16, "PentiumIII/Xeon", },
.
## diffname pc/devarch.c 2002/0703
## diff -e /n/emeliedump/2002/0531/sys/src/9/pc/devarch.c /n/emeliedump/2002/0703/sys/src/9/pc/devarch.c
808c
return (_pcmspecial != nil)? _pcmspecial(idstr, isa): -1;
.
140c
// Reserve a range to be ioalloced later.
// This is in particular useful for exchangable cards, such
.
112c
// entry is needed for swappable devs.
.
55c
int (*_pcmspecial)(char*, ISAConf*);
.
47c
".", { Qdir, 0, QTDIR }, 0, 0555,
.
14c
int reserved;
.
## diffname pc/devarch.c 2002/1105
## diff -e /n/emeliedump/2002/0703/sys/src/9/pc/devarch.c /n/emeliedump/2002/1105/sys/src/9/pc/devarch.c
509,512c
.clockenable= i8253enable,
.fastclock= i8253read,
.timerset= i8253timerset,
.
504,507c
.intrinit= i8259init,
.intrenable= i8259enable,
.intrvecno= i8259vecno,
.intrdisable= i8259disable,
.
498,502c
.id= "generic",
.ident= 0,
.reset= i8042reset,
.serialpower= unimplemented,
.modempower= unimplemented,
.
## diffname pc/devarch.c 2003/0204
## diff -e /n/emeliedump/2002/1105/sys/src/9/pc/devarch.c /n/emeliedump/2003/0204/sys/src/9/pc/devarch.c
407c
n = p - buf;
memmove(a, buf, n);
free(buf);
return n;
.
400,401c
sprint(p, "%8lux %8lux %-12.12s\n", m->start, m->end-1, m->tag);
.
393c
offset = offset/Linelen;
.
391c
if((buf = malloc(n)) == nil)
error(Enomem);
p = buf;
.
344c
char *buf, *p;
.
112a
*/
.
110a
/*
* Someone needs to explain why this was here...
.
## diffname pc/devarch.c 2003/0207
## diff -e /n/emeliedump/2003/0204/sys/src/9/pc/devarch.c /n/emeliedump/2003/0207/sys/src/9/pc/devarch.c
115d
112a
*/
.
## diffname pc/devarch.c 2003/0208
## diff -e /n/emeliedump/2003/0207/sys/src/9/pc/devarch.c /n/emeliedump/2003/0208/sys/src/9/pc/devarch.c
406c
snprint(p, Linelen+1, "%8lux %8lux %-12.12s\n", m->start, m->end-1, m->tag);
.
394c
/* allocate a buffer to avoid page faults in the loop */
if((buf = malloc(n+1)) == nil) /* +1 for the NUL */
.
## diffname pc/devarch.c 2003/0214
## diff -e /n/emeliedump/2003/0208/sys/src/9/pc/devarch.c /n/emeliedump/2003/0214/sys/src/9/pc/devarch.c
694,720d
690a
/*
* Detect whether the chip supports the global bit
* in page directory and page table entries. When set
* in a particular entry, it means ``don't bother removing
* this from the TLB when CR3 changes.''
*
* We flag all kernel pages with this bit. Doing so lessens the
* overhead of switching processes on bare hardware,
* even more so on VMware. See mmu.c:/^memglobal.
*
* For future reference, should we ever need to do a
* full TLB flush, it can be accomplished by clearing
* the PGE bit in CR4, writing to CR3, and then
* restoring the PGE bit.
*/
if(m->cpuiddx & 0x2000){
cr4 |= 0x80; /* page global enable bit */
m->havepge = 1;
}
.
676c
if(m->cpuiddx & 0x2088){
.
672,673c
* If machine check exception, page size extensions or page global bit
* are supported enable them in CR4 and clear any other set extensions.
.
630a
* - whether or not it supports the page global flag
* (if so turn it on)
.
629c
* - whether or not it supports machine check exceptions
.
627c
* - whether or not it supports page size extensions
.
407c
sprint(p, "%8lux %8lux %-12.12s\n", m->start, m->end-1, m->tag);
.
394,395c
if((buf = malloc(n)) == nil)
.
115a
*/
.
113d
## diffname pc/devarch.c 2003/0308
## diff -e /n/emeliedump/2003/0214/sys/src/9/pc/devarch.c /n/emeliedump/2003/0308/sys/src/9/pc/devarch.c
115d
112a
*/
.
## diffname pc/devarch.c 2003/0326
## diff -e /n/emeliedump/2003/0308/sys/src/9/pc/devarch.c /n/emeliedump/2003/0326/sys/src/9/pc/devarch.c
804c
addarchfile("archctl", 0664, archctlread, archctlwrite);
.
800,802d
755,759c
Cmdbuf *cb;
Cmdtab *ct;
cb = parsecmd(a, n);
if(waserror()){
free(cb);
nexterror();
}
ct = lookupcmd(cb, archctlmsg, nelem(archctlmsg));
switch(ct->index){
case CMpge:
if(!m->havepge)
error("processor does not support pge");
if(strcmp(cb->f[1], "on") == 0)
putcr4(getcr4() | 0x80);
else if(strcmp(cb->f[1], "off") == 0)
putcr4(getcr4() & ~0x80);
else
cmderror(cb, "invalid pge ctl");
break;
case CMcoherence:
if(strcmp(cb->f[1], "wbflush") == 0)
coherence = wbflush;
else if(strcmp(cb->f[1], "nop") == 0){
/* only safe on vmware */
if(conf.nmach > 1)
error("cannot disable coherence on a multiprocessor");
coherence = nop;
}else
cmderror(cb, "invalid coherence ctl");
break;
case CMi8253set:
if(strcmp(cb->f[1], "on") == 0)
i8253dotimerset = 1;
else if(strcmp(cb->f[1], "off") == 0)
i8253dotimerset = 0;
else
cmderror(cb, "invalid i2853set ctl");
break;
}
free(cb);
poperror();
.
753c
archctlwrite(Chan*, void *a, long n, vlong)
.
751a
enum
{
CMpge,
CMcoherence,
CMi8253set,
};
static Cmdtab archctlmsg[] =
{
CMpge, "pge", 2,
CMcoherence, "coherence", 2,
CMi8253set, "i8253set", 2,
};
.
737,749c
char buf[256];
int n;
n = snprint(buf, sizeof buf, "cpu %s %lud%s\n",
cputype->name, (ulong)(m->cpuhz+999999)/1000000,
m->havepge ? " pge" : "");
n += snprint(buf+n, sizeof buf-n, "pge %s\n", getcr4()&0x80 ? "on" : "off");
n += snprint(buf+n, sizeof buf-n, "coherence %s\n",
coherence==wbflush ? "wbflush" : "nop");
buf[n] = 0;
return readstr(offset, a, nn, buf);
.
735c
archctlread(Chan*, void *a, long nn, vlong offset)
.
501c
/*
* On a uniprocessor, you'd think that coherence could be nop,
* but it can't. We still need wbflush when using coherence() in
* device drivers.
*
* On VMware, it's safe (and a huge win) to set this to nop.
* Aux/vmware does this via the #P/archctl file.
*/
void (*coherence)(void) = wbflush;
.
115a
*/
.
113d
57a
extern int i8253dotimerset;
.
## diffname pc/devarch.c 2003/0328
## diff -e /n/emeliedump/2003/0326/sys/src/9/pc/devarch.c /n/emeliedump/2003/0328/sys/src/9/pc/devarch.c
610a
{6, 7, 23, "Via C3 Samuel 2 or Ezra",},
{6, 8, 23, "Via C3 Ezra-T",},
.
## diffname pc/devarch.c 2003/0401
## diff -e /n/emeliedump/2003/0328/sys/src/9/pc/devarch.c /n/emeliedump/2003/0401/sys/src/9/pc/devarch.c
815a
break;
case CMrealmode:
if(strcmp(cb->f[1], "realmode") == 0)
realmode();
.
772a
CMrealmode, "realmode", 1,
.
765a
CMrealmode
.
## diffname pc/devarch.c 2003/0402
## diff -e /n/emeliedump/2003/0401/sys/src/9/pc/devarch.c /n/emeliedump/2003/0402/sys/src/9/pc/devarch.c
818,821d
774d
766d
|
