ref: 8d51e7fa1a1dbcbde513c2b756d504c879598907
dir: /sys/src/9/pc/archacpi.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
#include "mp.h"
#include <aml.h>
typedef struct Rsd Rsd;
typedef struct Tbl Tbl;
struct Rsd {
uchar sig[8];
uchar csum;
uchar oemid[6];
uchar rev;
uchar raddr[4];
uchar len[4];
uchar xaddr[8];
uchar xcsum;
uchar reserved[3];
};
struct Tbl {
uchar sig[4];
uchar len[4];
uchar rev;
uchar csum;
uchar oemid[6];
uchar oemtid[8];
uchar oemrev[4];
uchar cid[4];
uchar crev[4];
uchar data[];
};
enum {
Tblsz = 4+4+1+1+6+8+4+4+4,
};
static Rsd *rsd;
/* physical addresses visited by maptable() */
static int ntblpa;
static uintptr tblpa[64];
/* successfully mapped tables */
static int ntblmap;
static Tbl *tblmap[64];
static ushort
get16(uchar *p){
return p[1]<<8 | p[0];
}
static uint
get32(uchar *p){
return p[3]<<24 | p[2]<<16 | p[1]<<8 | p[0];
}
static uvlong
get64(uchar *p){
uvlong u;
u = get32(p+4);
return u<<32 | get32(p);
}
static uint
tbldlen(Tbl *t){
return get32(t->len) - Tblsz;
}
static long
memcheck(uintptr pa, long len)
{
int i;
uintptr pe;
Confmem *cm;
if(len <= 0)
return len;
pe = pa + len-1;
if(pe < pa){
len = -pa;
pe = pa + len-1;
}
if(pa < PADDR(CPU0END))
return 0;
if(pe >= PADDR(KTZERO) && pa < PADDR(end))
return PADDR(KTZERO) - pa;
for(i=0; i<nelem(conf.mem); i++){
cm = &conf.mem[i];
if(cm->npage == 0)
continue;
if(pe >= cm->base && pa <= cm->base + cm->npage*BY2PG - 1)
return cm->base - pa;
}
return len;
}
static void
maptable(uvlong xpa)
{
uchar *p, *e;
uintptr pa;
u32int l;
Tbl *t;
int i;
pa = xpa;
if((uvlong)pa != xpa || pa == 0)
return;
if(ntblpa >= nelem(tblpa) || ntblmap >= nelem(tblmap))
return;
for(i=0; i<ntblpa; i++){
if(pa == tblpa[i])
return;
}
tblpa[ntblpa++] = pa;
if((t = vmap(pa, 8)) == nil)
return;
l = get32(t->len);
if(l < Tblsz){
vunmap(t, 8);
return;
}
if(memcheck(pa, l) != l){
print("maptable: ignoring %.4s at [%#p-%#p); overlaps usable memory\n",
(char*)t->sig, pa, pa+l);
vunmap(t, 8);
return;
}
vunmap(t, 8);
if((t = vmap(pa, l)) == nil)
return;
if(checksum(t, l)){
vunmap(t, l);
return;
}
tblmap[ntblmap++] = t;
p = (uchar*)t;
e = p + l;
if(memcmp("RSDT", t->sig, 4) == 0){
for(p = t->data; p+3 < e; p += 4)
maptable(get32(p));
return;
}
if(memcmp("XSDT", t->sig, 4) == 0){
for(p = t->data; p+7 < e; p += 8)
maptable(get64(p));
return;
}
if(memcmp("FACP", t->sig, 4) == 0){
if(l < 44)
return;
maptable(get32(p + 40));
if(l < 148)
return;
maptable(get64(p + 140));
return;
}
}
static void
maptables(void)
{
if(rsd == nil || ntblmap > 0 || ntblpa > 0)
return;
if(!checksum(rsd, 20))
maptable(get32(rsd->raddr));
if(rsd->rev >= 2)
if(!checksum(rsd, 36))
maptable(get64(rsd->xaddr));
}
static Apic*
findapic(int gsi, int *pintin)
{
Apic *a;
int i;
for(i=0; i<=MaxAPICNO; i++){
if((a = mpioapic[i]) == nil)
continue;
if((a->flags & PcmpEN) == 0)
continue;
if(gsi >= a->gsibase && gsi <= a->gsibase+a->mre){
if(pintin)
*pintin = gsi - a->gsibase;
return a;
}
}
print("findapic: no ioapic found for gsi %d\n", gsi);
return nil;
}
static void
addirq(int gsi, int type, int busno, int irq, int flags)
{
Apic *a;
Bus *bus;
Aintr *ai;
PCMPintr *pi;
int intin;
if((a = findapic(gsi, &intin)) == nil)
return;
for(bus = mpbus; bus; bus = bus->next)
if(bus->type == type && bus->busno == busno)
goto Foundbus;
if((bus = xalloc(sizeof(Bus))) == nil)
panic("addirq: no memory for Bus");
bus->busno = busno;
bus->type = type;
if(type == BusISA){
bus->po = PcmpHIGH;
bus->el = PcmpEDGE;
if(mpisabus == -1)
mpisabus = busno;
} else {
bus->po = PcmpLOW;
bus->el = PcmpLEVEL;
}
if(mpbus)
mpbuslast->next = bus;
else
mpbus = bus;
mpbuslast = bus;
Foundbus:
for(ai = bus->aintr; ai; ai = ai->next)
if(ai->intr->irq == irq)
return;
if((pi = xalloc(sizeof(PCMPintr))) == nil)
panic("addirq: no memory for PCMPintr");
pi->type = PcmpIOINTR;
pi->intr = PcmpINT;
pi->flags = flags & (PcmpPOMASK|PcmpELMASK);
pi->busno = busno;
pi->irq = irq;
pi->apicno = a->apicno;
pi->intin = intin;
if((ai = xalloc(sizeof(Aintr))) == nil)
panic("addirq: no memory for Aintr");
ai->intr = pi;
ai->apic = a;
ai->next = bus->aintr;
bus->aintr = ai;
}
static char*
eisaid(void *v)
{
static char id[8];
ulong b, l;
int i;
if(amltag(v) == 's')
return v;
b = amlint(v);
for(l = 0, i=24; i>=0; i -= 8, b >>= 8)
l |= (b & 0xFF) << i;
id[7] = 0;
for(i=6; i>=3; i--, l >>= 4)
id[i] = "0123456789ABCDEF"[l & 0xF];
for(i=2; i>=0; i--, l >>= 5)
id[i] = '@' + (l & 0x1F);
return id;
}
static int
pcibusno(void *dot)
{
int bno, adr, tbdf;
Pcidev *pdev;
void *p, *x;
char *id;
id = nil;
if((x = amlwalk(dot, "^_HID")) != nil)
if((p = amlval(x)) != nil)
id = eisaid(p);
if((x = amlwalk(dot, "^_BBN")) == nil)
if((x = amlwalk(dot, "^_ADR")) == nil)
return -1;
p = nil;
if(amleval(x, "", &p) < 0)
return -1;
adr = amlint(p);
/* if root bridge, then we are done here */
if(id != nil && (strcmp(id, "PNP0A03")==0 || strcmp(id, "PNP0A08")==0))
return adr;
x = amlwalk(dot, "^");
if(x == nil || x == dot)
return -1;
if((bno = pcibusno(x)) < 0)
return -1;
tbdf = MKBUS(BusPCI, bno, adr>>16, adr&0xFFFF);
pdev = pcimatchtbdf(tbdf);
if(pdev == nil)
return -1;
if(pdev->bridge == nil)
return bno;
return BUSBNO(pdev->bridge->tbdf);
}
static int
pciaddr(void *dot)
{
int adr, bno;
void *x, *p;
for(;;){
if((x = amlwalk(dot, "_ADR")) == nil){
x = amlwalk(dot, "^");
if(x == nil || x == dot)
break;
dot = x;
continue;
}
if((bno = pcibusno(x)) < 0)
break;
p = nil;
if(amleval(x, "", &p) < 0)
break;
adr = amlint(p);
return MKBUS(BusPCI, bno, adr>>16, adr&0xFFFF);
}
return -1;
}
static int
getirqs(void *d, uchar pmask[32], int *pflags)
{
int i, n, m;
uchar *p;
*pflags = 0;
memset(pmask, 0, 32);
if(amltag(d) != 'b')
return -1;
p = amlval(d);
if(amllen(d) >= 2 && (p[0] == 0x22 || p[0] == 0x23)){
pmask[0] = p[1];
pmask[1] = p[2];
if(amllen(d) >= 3 && p[0] == 0x23)
*pflags = ((p[3] & (1<<0)) ? PcmpEDGE : PcmpLEVEL)
| ((p[3] & (1<<3)) ? PcmpLOW : PcmpHIGH);
return 0;
}
if(amllen(d) >= 5 && p[0] == 0x89){
n = p[4];
if(amllen(d) < 5+n*4)
return -1;
for(i=0; i<n; i++){
m = get32(p+5 + i*4);
if(m >= 0 && m < 256)
pmask[m/8] |= 1<<(m%8);
}
*pflags = ((p[3] & (1<<1)) ? PcmpEDGE : PcmpLEVEL)
| ((p[3] & (1<<2)) ? PcmpLOW : PcmpHIGH);
return 0;
}
return -1;
}
static uchar*
setirq(void *d, uint irq)
{
uchar *p;
if(amltag(d) != 'b')
return nil;
p = amlnew('b', amllen(d));
memmove(p, d, amllen(p));
if(p[0] == 0x22 || p[0] == 0x23){
irq = 1<<irq;
p[1] = irq;
p[2] = irq>>8;
}
if(p[0] == 0x89){
p[4] = 1;
p[5] = irq;
p[6] = irq>>8;
p[7] = irq>>16;
p[8] = irq>>24;
}
return p;
}
static int
setuplink(void *link, int *pflags)
{
uchar im, pm[32], cm[32], *c;
static int lastirq = 1;
int gsi, i;
void *r;
if(amltag(link) != 'N')
return -1;
r = nil;
if(amleval(amlwalk(link, "_PRS"), "", &r) < 0)
return -1;
if(getirqs(r, pm, pflags) < 0)
return -1;
r = nil;
if(amleval(amlwalk(link, "_CRS"), "", &r) < 0)
return -1;
if(getirqs(r, cm, pflags) < 0)
return -1;
gsi = -1;
for(i=0; i<256; i++){
im = 1<<(i%8);
if(pm[i/8] & im){
if(cm[i/8] & im)
gsi = i;
}
}
if(gsi > 0 || getconf("*nopcirouting") != nil)
return gsi;
for(i=0; i<256; i++){
gsi = lastirq++ & 0xFF; /* round robin */
im = 1<<(gsi%8);
if(pm[gsi/8] & im){
if((c = setirq(r, gsi)) == nil)
break;
if(amleval(amlwalk(link, "_SRS"), "b", c, nil) < 0)
break;
return gsi;
}
}
return -1;
}
static int
enumprt(void *dot, void *)
{
void *p, **a, **b;
int bno, dno, pin, gsi, flags;
int n, i;
bno = pcibusno(dot);
if(bno < 0)
return 1;
/* evalulate _PRT method */
p = nil;
if(amleval(dot, "", &p) < 0)
return 1;
if(amltag(p) != 'p')
return 1;
amltake(p);
n = amllen(p);
a = amlval(p);
for(i=0; i<n; i++){
if(amltag(a[i]) != 'p')
continue;
if(amllen(a[i]) != 4)
continue;
flags = 0;
b = amlval(a[i]);
dno = amlint(b[0])>>16;
pin = amlint(b[1]);
gsi = amlint(b[3]);
if(gsi==0){
gsi = setuplink(b[2], &flags);
if(gsi <= 0)
continue;
}
addirq(gsi, BusPCI, bno, (dno<<2)|pin, flags);
}
amldrop(p);
return 1;
}
static int
enumec(void *dot, void *)
{
int cmdport, dataport;
uchar *b;
void *x;
char *id;
b = nil;
id = eisaid(amlval(amlwalk(dot, "^_HID")));
if(id == nil || strcmp(id, "PNP0C09") != 0)
return 1;
if((x = amlwalk(dot, "^_CRS")) == nil)
return 1;
if(amleval(x, "", &b) < 0 || amltag(b) != 'b' || amllen(b) < 16)
return 1;
if(b[0] != 0x47 || b[8] != 0x47) /* two i/o port descriptors */
return 1;
dataport = b[0+2] | b[0+3]<<8;
cmdport = b[8+2] | b[8+3]<<8;
ecinit(cmdport, dataport);
return 1;
}
static long
readmem(Chan*, void *v, long n, vlong o)
{
uintptr pa = (uintptr)o;
void *t;
if((n = memcheck(pa, n)) <= 0)
return 0;
if((t = vmap(pa, n)) == nil)
error(Enovmem);
if(waserror()){
vunmap(t, n);
nexterror();
}
memmove(v, t, n);
vunmap(t, n);
poperror();
return n;
}
static long
writemem(Chan*, void *v, long n, vlong o)
{
uintptr pa = (uintptr)o;
void *t;
if(memcheck(pa, n) != n)
error(Eio);
if((t = vmap(pa, n)) == nil)
error(Enovmem);
if(waserror()){
vunmap(t, n);
nexterror();
}
memmove(t, v, n);
vunmap(t, n);
poperror();
return n;
}
static void
acpiinit(void)
{
Tbl *t;
Apic *a;
void *va;
uchar *s, *p, *e;
ulong lapicbase;
int machno, i, c;
maptables();
amlinit();
/* load DSDT */
for(i=0; i<ntblmap; i++){
t = tblmap[i];
if(memcmp(t->sig, "DSDT", 4) == 0){
amlintmask = (~0ULL) >> (t->rev <= 1)*32;
amlload(t->data, tbldlen(t));
break;
}
}
/* load SSDT, there can be multiple tables */
for(i=0; i<ntblmap; i++){
t = tblmap[i];
if(memcmp(t->sig, "SSDT", 4) == 0)
amlload(t->data, tbldlen(t));
}
/* set APIC mode */
amleval(amlwalk(amlroot, "_PIC"), "i", 1, nil);
for(i=0; i<ntblmap; i++){
t = tblmap[i];
if(memcmp(t->sig, "APIC", 4) == 0)
goto Foundapic;
}
panic("acpiinit: no MADT (APIC) table");
return;
Foundapic:
s = t->data;
e = s + tbldlen(t);
lapicbase = get32(s); s += 8;
va = vmap(lapicbase, 1024);
print("LAPIC: %.8lux %#p\n", lapicbase, va);
if(va == nil)
panic("acpiinit: cannot map lapic %.8lux", lapicbase);
machno = 0;
for(p = s; p < e; p += c){
c = p[1];
if(c < 2 || (p+c) > e)
break;
switch(*p){
case 0x00: /* Processor Local APIC */
if(p[3] > MaxAPICNO)
break;
if((a = xalloc(sizeof(Apic))) == nil)
panic("acpiinit: no memory for Apic");
a->type = PcmpPROCESSOR;
a->apicno = p[3];
a->paddr = lapicbase;
a->addr = va;
a->lintr[0] = ApicIMASK;
a->lintr[1] = ApicIMASK;
a->flags = p[4] & PcmpEN;
/* skip disabled processors */
if((a->flags & PcmpEN) == 0 || mpapic[a->apicno] != nil){
xfree(a);
break;
}
a->machno = machno++;
/*
* platform firmware should list the boot processor
* as the first processor entry in the MADT
*/
if(a->machno == 0)
a->flags |= PcmpBP;
mpapic[a->apicno] = a;
break;
case 0x01: /* I/O APIC */
if(p[2] > MaxAPICNO)
break;
if((a = xalloc(sizeof(Apic))) == nil)
panic("acpiinit: no memory for io Apic");
a->type = PcmpIOAPIC;
a->apicno = p[2];
a->paddr = get32(p+4);
if((a->addr = vmap(a->paddr, 1024)) == nil)
panic("acpiinit: cannot map ioapic %.8lux", a->paddr);
a->gsibase = get32(p+8);
a->flags = PcmpEN;
mpioapic[a->apicno] = a;
ioapicinit(a, a->apicno);
break;
}
}
/*
* need 2nd pass as vbox puts interrupt overrides
* *before* the ioapic entries (!)
*/
for(p = s; p < e; p += c){
c = p[1];
if(c < 2 || (p+c) > e)
break;
switch(*p){
case 0x02: /* Interrupt Source Override */
addirq(get32(p+4), BusISA, 0, p[3], get16(p+8));
break;
case 0x03: /* NMI Source */
case 0x04: /* Local APIC NMI */
case 0x05: /* Local APIC Address Override */
case 0x06: /* I/O SAPIC */
case 0x07: /* Local SAPIC */
case 0x08: /* Platform Interrupt Sources */
case 0x09: /* Processor Local x2APIC */
case 0x0A: /* x2APIC NMI */
case 0x0B: /* GIC */
case 0x0C: /* GICD */
break;
}
}
/* find embedded controller */
amlenum(amlroot, "_HID", enumec, nil);
/* look for PCI interrupt mappings */
amlenum(amlroot, "_PRT", enumprt, nil);
/* add identity mapped legacy isa interrupts */
for(i=0; i<16; i++)
addirq(i, BusISA, 0, i, 0);
/* free the AML interpreter */
amlexit();
/*
* Ininitalize local APIC and start application processors.
*/
mpinit();
}
static void
acpireset(void)
{
uchar *p;
Tbl *t;
int i;
/* stop application processors */
mpshutdown();
/* locate and write platform reset register */
for(i=0; i < ntblmap; i++){
t = tblmap[i];
if(memcmp(t->sig, "FACP", 4) != 0)
continue;
if(get32(t->len) <= 128)
break;
p = (uchar*)t;
if((get32(p + 112) & (1<<10)) == 0)
break;
if(p[116+0] != IoSpace)
break;
outb(get32(p+116+4), p[128]);
break;
}
/* acpi shutdown failed, try generic reset */
archreset();
}
static int identify(void);
PCArch archacpi = {
.id= "ACPI",
.ident= identify,
.reset= acpireset,
.intrinit= acpiinit,
.intrenable= mpintrenable,
.intron= lapicintron,
.introff= lapicintroff,
.fastclock= i8253read,
.timerset= lapictimerset,
};
static long
readtbls(Chan*, void *v, long n, vlong o)
{
int i, l, m;
uchar *p;
Tbl *t;
maptables();
p = v;
for(i=0; n > 0 && i < ntblmap; i++){
t = tblmap[i];
l = get32(t->len);
if(o >= l){
o -= l;
continue;
}
m = l - o;
if(m > n)
m = n;
memmove(p, (uchar*)t + o, m);
p += m;
n -= m;
o = 0;
}
return p - (uchar*)v;
}
static int
identify(void)
{
uintptr pa;
char *cp;
if((cp = getconf("*acpi")) == nil)
return 1;
pa = (uintptr)strtoull(cp, nil, 16);
if(pa <= 1)
rsd = rsdsearch();
else if(pa < MemMin)
rsd = KADDR(pa);
else
rsd = vmap(pa, sizeof(Rsd));
if(rsd == nil)
return 1;
if(checksum(rsd, 20) && checksum(rsd, 36))
return 1;
addarchfile("acpitbls", 0444, readtbls, nil);
addarchfile("acpimem", 0600, readmem, writemem);
if(strcmp(cp, "0") == 0)
return 1;
if((cp = getconf("*nomp")) != nil && strcmp(cp, "0") != 0)
return 1;
if(m->havetsc && getconf("*notsc") == nil)
archacpi.fastclock = tscticks;
return 0;
}
static int
readpcicfg(Amlio *io, void *data, int n, int offset)
{
ulong r, x;
Pcidev *p;
uchar *a;
int i;
a = data;
p = io->aux;
if(p == nil)
return -1;
offset += io->off;
if(offset > 256)
return 0;
if(n+offset > 256)
n = 256-offset;
r = offset;
if(!(r & 3) && n == 4){
x = pcicfgr32(p, r);
PBIT32(a, x);
return 4;
}
if(!(r & 1) && n == 2){
x = pcicfgr16(p, r);
PBIT16(a, x);
return 2;
}
for(i = 0; i < n; i++){
x = pcicfgr8(p, r);
PBIT8(a, x);
a++;
r++;
}
return i;
}
static int
readec(Amlio *io, void *data, int n, int off)
{
int port, v;
uchar *p;
USED(io);
if(off < 0 || off >= 256)
return 0;
if(off+n > 256)
n = 256 - off;
p = data;
for(port = off; port < off+n; port++){
if((v = ecread(port)) < 0)
break;
*p++ = v;
}
return n;
}
static int
writeec(Amlio *io, void *data, int n, int off)
{
int port;
uchar *p;
USED(io);
if(off < 0 || off+n > 256)
return -1;
p = data;
for(port = off; port < off+n; port++)
if(ecwrite(port, *p++) < 0)
break;
return n;
}
static int
writepcicfg(Amlio *io, void *data, int n, int offset)
{
ulong r, x;
Pcidev *p;
uchar *a;
int i;
a = data;
p = io->aux;
if(p == nil)
return -1;
offset += io->off;
if(offset > 256)
return 0;
if(n+offset > 256)
n = 256-offset;
r = offset;
if(!(r & 3) && n == 4){
x = GBIT32(a);
pcicfgw32(p, r, x);
return 4;
}
if(!(r & 1) && n == 2){
x = GBIT16(a);
pcicfgw16(p, r, x);
return 2;
}
for(i = 0; i < n; i++){
x = GBIT8(a);
pcicfgw8(p, r, x);
a++;
r++;
}
return i;
}
static int
readioport(Amlio *io, void *data, int len, int port)
{
uchar *a;
a = data;
port += io->off;
switch(len){
case 4:
PBIT32(a, inl(port));
return 4;
case 2:
PBIT16(a, ins(port));
return 2;
case 1:
PBIT8(a, inb(port));
return 1;
}
return -1;
}
static int
writeioport(Amlio *io, void *data, int len, int port)
{
uchar *a;
a = data;
port += io->off;
switch(len){
case 4:
outl(port, GBIT32(a));
return 4;
case 2:
outs(port, GBIT16(a));
return 2;
case 1:
outb(port, GBIT8(a));
return 1;
}
return -1;
}
int
amlmapio(Amlio *io)
{
int tbdf;
Pcidev *pdev;
char buf[64];
switch(io->space){
default:
print("amlmapio: address space %x not implemented\n", io->space);
break;
case MemSpace:
if(memcheck(io->off, io->len) != io->len){
print("amlmapio: [%#p-%#p) overlaps usable memory\n",
(uintptr)io->off, (uintptr)(io->off+io->len));
break;
}
if((io->va = vmap(io->off, io->len)) == nil){
print("amlmapio: vmap failed\n");
break;
}
return 0;
case IoSpace:
snprint(buf, sizeof(buf), "%N", io->name);
if(ioalloc(io->off, io->len, 0, buf) < 0){
print("amlmapio: ioalloc failed\n");
break;
}
io->read = readioport;
io->write = writeioport;
return 0;
case PcicfgSpace:
if((tbdf = pciaddr(io->name)) < 0){
print("amlmapio: no address\n");
break;
}
if((pdev = pcimatchtbdf(tbdf)) == nil){
print("amlmapio: no device %T\n", tbdf);
break;
}
io->aux = pdev;
io->read = readpcicfg;
io->write = writepcicfg;
return 0;
case EbctlSpace:
io->read = readec;
io->write = writeec;
return 0;
}
print("amlmapio: mapping %N failed\n", io->name);
return -1;
}
void
amlunmapio(Amlio *io)
{
switch(io->space){
case MemSpace:
vunmap(io->va, io->len);
break;
case IoSpace:
iofree(io->off);
break;
}
}
void*
amlalloc(int n){
void *p;
if((p = malloc(n)) == nil)
panic("amlalloc: no memory");
memset(p, 0, n);
return p;
}
void
amlfree(void *p){
free(p);
}
void
amldelay(int us)
{
microdelay(us);
}