ref: 418f36d7ebc2a94ebabf05109eb17d632470600d
dir: /sys/src/9/mt7688/devarch.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include "io.h"
enum {
Qdir = 0,
Qbase,
Qmax = 16,
};
typedef long Rdwrfn(Chan*, void*, long, vlong);
static Rdwrfn *readfn[Qmax];
static Rdwrfn *writefn[Qmax];
static Dirtab archdir[Qmax] = {
".", { Qdir, 0, QTDIR }, 0, 0555,
};
Lock archwlock; /* the lock is only for changing archdir */
QLock plock;
int narchdir = Qbase;
/*
* 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;
}
static Chan*
archattach(char* spec)
{
return devattach('P', spec);
}
Walkqid*
archwalk(Chan* c, Chan *nc, char** name, int nname)
{
return devwalk(c, nc, name, nname, archdir, narchdir, devgen);
}
static int
archstat(Chan* c, uchar* dp, int n)
{
return devstat(c, dp, n, archdir, narchdir, devgen);
}
static Chan*
archopen(Chan* c, int omode)
{
return devopen(c, omode, archdir, narchdir, devgen);
}
static void
archclose(Chan*)
{
}
static long
archread(Chan *c, void *a, long n, vlong offset)
{
Rdwrfn *fn;
switch((ulong)c->qid.path){
case Qdir:
return devdirread(c, a, n, archdir, narchdir, devgen);
default:
if(c->qid.path < narchdir && (fn = readfn[c->qid.path]))
return fn(c, a, n, offset);
error(Eperm);
break;
}
return 0;
}
static long
archwrite(Chan *c, void *a, long n, vlong offset)
{
Rdwrfn *fn;
if(c->qid.path < narchdir && (fn = writefn[c->qid.path]))
return fn(c, a, n, offset);
error(Eperm);
return 0;
}
void archinit(void);
Dev archdevtab = {
'P',
"arch",
devreset,
archinit,
devshutdown,
archattach,
archwalk,
archstat,
archopen,
devcreate,
archclose,
archread,
devbread,
archwrite,
devbwrite,
devremove,
devwstat,
};
static long
cputyperead(Chan*, void *a, long n, vlong offset)
{
u32int pridval, conf0val, conf1val;
u8int compop, compid, procid, revision;
u8int major, minor, patch;
u8int fpu, cop2, tlbs, coher;
int icache, dcache;
char *procidstr, *endian, *writetype;
char *p;
int l;
pridval = prid();
conf0val = getconfig();
conf1val = getconfig1();
compop = (pridval >> 24) & 0xFF;
compid = (pridval >> 16) & 0xFF;
procid = (pridval >> 8) & 0xFF;
revision = pridval & 0xFF;
patch = revision & 0x3;
minor = (revision >> 2) & 0x7;
major = (revision >> 5) & 0x7;
switch(procid){
case 0x93:
procidstr = "24K";
break;
case 0x96:
procidstr = "24KE";
break;
case 0x97:
procidstr = "74K";
break;
case 0x99:
procidstr = "1004K";
break;
default:
procidstr = "missingno";
break;
}
coher = conf0val & 0x7;
switch(coher){
case 0:
writetype = "write-through";
break;
case 2:
writetype = "uncached";
break;
case 3:
writetype = "write-back";
break;
case 7:
writetype = "uncached accelerated";
break;
default:
writetype = "unknown";
break;
}
endian = conf0val & (1<<15)? "mips" : "spim";
fpu = conf1val & 0x1? 1 : 0;
cop2 = conf1val & 0x40? 1 : 0;
tlbs = ((conf1val >> 25) & 0x3F) + 1;
icache = (64 << ((conf1val >> 22) & 0x7)) / 8;
dcache = (64 << ((conf1val >> 13) & 0x7)) / 8;
p = smalloc(READSTR);
l = 0;
l += snprint(p+l, READSTR-l, "%s %s\n", endian, procidstr);
l += snprint(p+l, READSTR-l, "%uX %uX %d.%d.%d\n",
compid, compop, major, minor, patch);
l += snprint(p+l, READSTR-l, "%dkB icache, %dkB dcache, %s\n",
icache, dcache, writetype);
l += snprint(p+l, READSTR-l, "%d TLB entries\n", tlbs);
l += snprint(p+l, READSTR-l, "fpu: %s\n", fpu ? "yes" : "no");
l += snprint(p+l, READSTR-l, "cop2: %s\n", cop2 ? "yes" : "no");
n = readstr(offset, a, n, p);
free(p);
USED(l);
return n;
}
typedef struct Gate Gate;
struct Gate {
char *name;
u32int cmask;
u32int rmask;
};
static Gate gate[] = {
{"PWM ", 1<<31, 1<<31},
{"SDXC ", 1<<30, 1<<30},
{"Crypto ", 1<<29, 1<<29},
{"Mips Cnt ", 1<<28, 1<<28},
{"PCIE2 ", 1<<26, 1<<26},
{"Uphy ", 1<<25, 0},
{"Ephy ", 0, 1<<24},
{"Ether ", 1<<23, 1<<23},
{"USB ", 0, 1<<22},
{"uart2 ", 1<<20, 1<<20},
{"uart1 ", 1<<19, 1<<19},
{"SPI ", 1<<18, 1<<18},
{"I2S ", 1<<17, 1<<17},
{"I²C ", 1<<16, 1<<16},
{"GDMA ", 1<<14, 1<<14},
{"PIO ", 1<<13, 1<<13},
{"uart ", 1<<12, 1<<12},
{"PCM ", 1<<11, 1<<11},
{"MC ", 1<<10, 1<<10},
{"Int ", 1<<9, 1<<9},
{"timer ", 1<<8, 1<<8},
{"HIF ", 0, 1<<5},
{"WiFI ", 0, 1<<4},
{"SPIs ", 0, 1<<3},
{"System ", 0, 1<<0},
};
static long
sysctlread(Chan*, void *a, long n, vlong offset)
{
u32int chipid1 = *IO(u32int, (SYSCTLBASE + 0x00));
u32int chipid2 = *IO(u32int, (SYSCTLBASE + 0x04));
u32int clocks = *IO(u32int, (SYSCTLBASE + 0x30));
u32int resets = *IO(u32int, (SYSCTLBASE + 0x34));
char chipid[8], *cstate, *rstate;
char *p;
int l, i;
chipid[0] = chipid1 & 0xFF;
chipid[1] = (chipid1 >> 8) & 0xFF;
chipid[2] = (chipid1 >> 16) & 0xFF;
chipid[3] = (chipid1 >> 24) & 0xFF;
chipid[4] = chipid2 & 0xFF;
chipid[5] = (chipid2 >> 8) & 0xFF;
chipid[6] = (chipid2 >> 16) & 0xFF;
chipid[7] = (chipid2 >> 24) & 0xFF;
p = smalloc(READSTR);
l = 0;
l += snprint(p+l, READSTR-l, "chipID: %s\n", chipid);
l += snprint(p+l, READSTR-l, "device\t\tclock\treset\n");
for(i = 0; i < nelem(gate); i++){
if(gate[i].cmask == 0){
cstate = "n/a";
} else {
cstate = clocks & gate[i].cmask ? "on" : "off";
}
if(gate[i].rmask == 0){
rstate = "n/a";
} else {
rstate = resets & gate[i].rmask ? "on" : "off";
}
l += snprint(p+l, READSTR-l, "%s%s\t%s\n", gate[i].name, cstate, rstate);
}
n = readstr(offset, a, n, p);
free(p);
return n;
}
void
archinit(void)
{
addarchfile("cputype", 0444, cputyperead, nil);
addarchfile("sysctl", 0444, sysctlread, nil);
}