experimental acpi support for apic irq routing

sys/include/aml.h

@@ -0,0 +1,36 @@
+#pragma	lib	"libaml.a"
+#pragma	src	"/sys/src/libaml"
+
+/*
+ *	b	uchar*	buffer		amllen() returns number of bytes
+ *	s	char*	string		amllen() is strlen()
+ *	i	uvlong*	integer
+ *	p	void**	package		amllen() is # of elements
+ *	r	void*	region
+ *	f	void*	field
+ *	u	void*	bufferfield
+ *	N	void*	name
+ *	R	void*	reference
+ */
+int		amltag(void *);
+void*		amlval(void *);
+uvlong		amlint(void *);
+int		amllen(void *);
+
+void		amlinit(void);
+void		amlexit(void);
+
+int		amlload(uchar *data, int len);
+void*		amlwalk(void *dot, char *name);
+int		amleval(void *dot, char *fmt, ...);
+void		amlenum(void *dot, char *seg, int (*proc)(void *, void *), void *arg);
+
+void*		amlroot;
+int		amldebug;
+
+#pragma	varargck	type	"V"	void*
+#pragma	varargck	type	"N"	void*
+
+/* to be provided by operating system */
+extern void*	amlalloc(int);
+extern void	amlfree(void*);

sys/src/9/pc/acpi.c

@@ -1,219 +0,0 @@
-#include "u.h"
-#include "../port/lib.h"
-#include "mem.h"
-#include "dat.h"
-#include "fns.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[];
-};
-
-static int ntbltab;
-static Tbl *tbltab[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 int
-checksum(void *v, int n)
-{
-	uchar *p, s;
-
-	s = 0;
-	p = v;
-	while(n-- > 0)
-		s += *p++;
-	return s;
-}
-
-static void*
-rsdscan(uchar* addr, int len, char* sig)
-{
-	int sl;
-	uchar *e, *p;
-
-	e = addr+len;
-	sl = strlen(sig);
-	for(p = addr; p+sl < e; p += 16){
-		if(memcmp(p, sig, sl))
-			continue;
-		return p;
-	}
-	return nil;
-}
-
-static void*
-rsdsearch(char* sig)
-{
-	uintptr p;
-	uchar *bda;
-	Rsd *rsd;
-
-	/*
-	 * Search for the data structure signature:
-	 * 1) in the first KB of the EBDA;
-	 * 2) in the BIOS ROM between 0xE0000 and 0xFFFFF.
-	 */
-	if(strncmp((char*)KADDR(0xFFFD9), "EISA", 4) == 0){
-		bda = KADDR(0x400);
-		if((p = (bda[0x0F]<<8)|bda[0x0E]))
-			if(rsd = rsdscan(KADDR(p), 1024, sig))
-				return rsd;
-	}
-	return rsdscan(KADDR(0xE0000), 0x20000, sig);
-}
-
-static void
-maptable(uvlong xpa)
-{
-	uchar *p, *e;
-	Tbl *t, *a;
-	uintptr pa;
-	u32int l;
-	int i;
-
-	pa = xpa;
-	if((uvlong)pa != xpa || pa == 0)
-		return;
-	if(ntbltab >= nelem(tbltab))
-		return;
-	if((t = vmap(pa, 8)) == nil)
-		return;
-	l = get32(t->len);
-	if(l < sizeof(Tbl) || t->sig[0] == 0){
-		vunmap(t, 8);
-		return;
-	}
-	for(i=0; i<ntbltab; i++){
-		if(memcmp(tbltab[i]->sig, t->sig, sizeof(t->sig)) == 0)
-			break;
-	}
-	vunmap(t, 8);
-	if(i < ntbltab)
-		return;
-	if((a = malloc(l)) == nil)
-		return;
-	if((t = vmap(pa, l)) == nil){
-		free(a);
-		return;
-	}
-	if(checksum(t, l)){
-		vunmap(t, l);
-		free(a);
-		return;
-	}
-	memmove(a, t, l);
-	vunmap(t, l);
-
-	tbltab[ntbltab++] = t = a;
-
-	if(0) print("acpi: %llux %.4s %d\n", xpa, (char*)t->sig, l);
-
-	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 long
-readtbls(Chan*, void *v, long n, vlong o)
-{
-	int i, l, m;
-	uchar *p;
-	Tbl *t;
-
-	p = v;
-	for(i=0; n > 0 && i < ntbltab; i++){
-		t = tbltab[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;
-}
-
-void
-acpilink(void)
-{
-	Rsd *r;
-
-	/*
-	 * this is a debug driver to dump the acpi tables.
-	 * do nothing unless *acpi gets explicitly enabled.
-	 */
-	if(getconf("*acpi") == nil)
-		return;
-	if((r = rsdsearch("RSD PTR ")) == nil)
-		return;
-	if(checksum(r, 20) == 0)
-		maptable(get32(r->raddr));
-	if(r->rev >= 2)
-		if(checksum(r, 36) == 0)
-			maptable(get64(r->xaddr));
-	addarchfile("acpitbls", 0444, readtbls, nil);
-}

sys/src/9/pc/archacpi.c

@@ -0,0 +1,525 @@
+#include "u.h"
+#include "../port/lib.h"
+#include "mem.h"
+#include "dat.h"
+#include "fns.h"
+#include "io.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[];
+};
+
+static Rsd *rsd;
+static int ntbltab;
+static Tbl *tbltab[64];
+
+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);
+}
+
+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) - sizeof(Tbl);
+}
+
+static int
+checksum(void *v, int n)
+{
+	uchar *p, s;
+
+	s = 0;
+	p = v;
+	while(n-- > 0)
+		s += *p++;
+	return s;
+}
+
+static void*
+rsdscan(uchar* addr, int len, char* sig)
+{
+	int sl;
+	uchar *e, *p;
+
+	e = addr+len;
+	sl = strlen(sig);
+	for(p = addr; p+sl < e; p += 16){
+		if(memcmp(p, sig, sl))
+			continue;
+		return p;
+	}
+	return nil;
+}
+
+static void*
+rsdsearch(char* sig)
+{
+	uintptr p;
+	uchar *bda;
+	Rsd *rsd;
+
+	/*
+	 * Search for the data structure signature:
+	 * 1. in the first KB of the EBDA;
+	 * 2. in the BIOS ROM between 0xE0000 and 0xFFFFF.
+	 */
+	if(strncmp((char*)KADDR(0xFFFD9), "EISA", 4) == 0){
+		bda = KADDR(0x400);
+		if((p = (bda[0x0F]<<8)|bda[0x0E]))
+			if(rsd = rsdscan(KADDR(p), 1024, sig))
+				return rsd;
+	}
+	return rsdscan(KADDR(0xE0000), 0x20000, sig);
+}
+
+static Tbl*
+findtable(void *sig){
+	int i;
+	for(i=0; i<ntbltab; i++)
+		if(memcmp(tbltab[i]->sig, sig, 4) == 0)
+			return tbltab[i];
+	return nil;
+}
+
+static void
+maptable(uvlong xpa)
+{
+	uchar *p, *e;
+	uintptr pa;
+	u32int l;
+	Tbl *t;
+
+	pa = xpa;
+	if((uvlong)pa != xpa || pa == 0)
+		return;
+	if(ntbltab >= nelem(tbltab))
+		return;
+	if((t = vmap(pa, 8)) == nil)
+		return;
+	l = get32(t->len);
+	if(l < sizeof(Tbl) || findtable(t->sig)){
+		vunmap(t, 8);
+		return;
+	}
+	vunmap(t, 8);
+	if((t = vmap(pa, l)) == nil)
+		return;
+	if(checksum(t, l)){
+		vunmap(t, l);
+		return;
+	}
+
+	tbltab[ntbltab++] = 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 || ntbltab > 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 int
+pcibusno(void *dot)
+{
+	int bno, adr, tbdf;
+	Pcidev *pdev;
+	void *p, *x;
+
+	p = nil;
+	if(x = amlwalk(dot, "^_BBN")){
+		if(amleval(x, "", &p) < 0)
+			return -1;
+		return amlint(p);
+	}
+	if((x = amlwalk(dot, "^_ADR")) == nil)
+		return -1;
+	if(amleval(x, "", &p) < 0)
+		return -1;
+	adr = amlint(p);
+	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 || pdev->bridge == nil){
+		print("pcibusno: bridge tbdf %luX not found\n", (ulong)tbdf);
+		return -1;
+	}
+	return BUSBNO(pdev->bridge->tbdf);
+}
+
+static int
+enumprt(void *dot, void *)
+{
+	void *p, **a, **b;
+	int bno, dno, pin;
+	int n, i;
+
+	bno = pcibusno(dot);
+	if(bno < 0){
+		print("enumprt: cannot get pci bus number for %V\n", dot);
+		return 1;
+	}
+
+	/* evalulate _PRT method */
+	p = nil;
+	if(amleval(dot, "", &p) < 0)
+		return 1;
+	if(amltag(p) != 'p')
+		return 1;
+
+	n = amllen(p);
+	a = amlval(p);
+	for(i=0; i<n; i++){
+		if(amltag(a[i]) != 'p')
+			continue;
+		if(amllen(a[i]) != 4)
+			continue;
+		b = amlval(a[i]);
+		dno = amlint(b[0])>>16;
+		pin = amlint(b[1]);
+		if(amltag(b[2]) == 'N' || amlint(b[2])){
+			print("enumprt: interrupt link not handled %V\n", b[2]);
+			continue;
+		}
+		addirq(amlint(b[3]), BusPCI, bno, (dno<<2)|pin, 0);
+	}
+	return 1;
+}
+
+static void
+acpiinit(void)
+{
+	Tbl *t;
+	Apic *a;
+	void *va;
+	uchar *p, *e;
+	ulong lapicbase;
+	int machno, i, c;
+
+	maptables();
+
+	amlinit();
+
+	if(t = findtable("DSDT"))
+		amlload(t->data, tbldlen(t));
+	if(t = findtable("SSDT"))
+		amlload(t->data, tbldlen(t));
+
+	/* set APIC mode */
+	amleval(amlwalk(amlroot, "_PIC"), "i", 1, nil);
+
+	if((t = findtable("APIC")) == nil)
+		panic("acpiinit: no APIC table found");
+
+	p = t->data;
+	e = p + tbldlen(t);
+	lapicbase = get32(p); p += 8;
+	va = vmap(lapicbase, 1024);
+	print("LAPIC: %.8lux %.8lux\n", lapicbase, (ulong)va);
+	if(va == nil)
+		panic("acpiinit: cannot map lapic %.8lux", lapicbase);
+
+	machno = 0;
+	for(; 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);
+			if(a->flags & PcmpEN){
+				a->machno = machno++;
+
+				/*
+				 * how do we know if this is the
+				 * bootstrap processors apic?
+				 */
+				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;
+		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;
+		}
+	}
+
+	/* 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 int identify(void);
+
+PCArch archacpi = {
+.id=		"ACPI",	
+.ident=		identify,
+.reset=		mpshutdown,
+.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 < ntbltab; i++){
+		t = tbltab[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)
+{
+	char *cp;
+
+	if((cp = getconf("*acpi")) == nil)
+		return 1;
+	if((rsd = rsdsearch("RSD PTR ")) == nil)
+		return 1;
+	addarchfile("acpitbls", 0444, readtbls, nil);
+	if(strcmp(cp, "0") == 0)
+		return 1;
+	if((cp = getconf("*nomp")) != nil && strcmp(cp, "0") != 0)
+		return 1;
+	if(cpuserver && m->havetsc)
+		archacpi.fastclock = tscticks;
+	return 0;
+}

sys/src/9/pc/archmp.c

@@ -7,7 +7,352 @@
 
 #include "mp.h"
 
-_MP_ *_mp_;
+static PCMP *pcmp;
+
+static char* buses[] = {
+	"CBUSI ",
+	"CBUSII",
+	"EISA  ",
+	"FUTURE",
+	"INTERN",
+	"ISA   ",
+	"MBI   ",
+	"MBII  ",
+	"MCA   ",
+	"MPI   ",
+	"MPSA  ",
+	"NUBUS ",
+	"PCI   ",
+	"PCMCIA",
+	"TC    ",
+	"VL    ",
+	"VME   ",
+	"XPRESS",
+	0,
+};
+
+static Bus*
+mpgetbus(int busno)
+{
+	Bus *bus;
+
+	for(bus = mpbus; bus; bus = bus->next)
+		if(bus->busno == busno)
+			return bus;
+
+	print("mpgetbus: can't find bus %d\n", busno);
+
+	return 0;
+}
+
+static Apic*
+mkprocessor(PCMPprocessor* p)
+{
+	static int machno = 1;
+	int apicno;
+	Apic *apic;
+
+	apicno = p->apicno;
+	if(!(p->flags & PcmpEN) || apicno > MaxAPICNO || mpapic[apicno] != nil)
+		return 0;
+
+	if((apic = xalloc(sizeof(Apic))) == nil)
+		panic("mkprocessor: no memory for Apic");
+	apic->type = PcmpPROCESSOR;
+	apic->apicno = apicno;
+	apic->flags = p->flags;
+	apic->lintr[0] = ApicIMASK;
+	apic->lintr[1] = ApicIMASK;
+	if(p->flags & PcmpBP)
+		apic->machno = 0;
+	else
+		apic->machno = machno++;
+	mpapic[apicno] = apic;
+
+	return apic;
+}
+
+static Bus*
+mkbus(PCMPbus* p)
+{
+	Bus *bus;
+	int i;
+
+	for(i = 0; buses[i]; i++)
+		if(strncmp(buses[i], p->string, sizeof(p->string)) == 0)
+			break;
+	if(buses[i] == 0)
+		return 0;
+
+	if((bus = xalloc(sizeof(Bus))) == nil)
+		panic("mkbus: no memory for Bus");
+	if(mpbus)
+		mpbuslast->next = bus;
+	else
+		mpbus = bus;
+	mpbuslast = bus;
+
+	bus->type = i;
+	bus->busno = p->busno;
+	if(bus->type == BusEISA){
+		bus->po = PcmpLOW;
+		bus->el = PcmpLEVEL;
+		if(mpeisabus != -1)
+			print("mkbus: more than one EISA bus\n");
+		mpeisabus = bus->busno;
+	}
+	else if(bus->type == BusPCI){
+		bus->po = PcmpLOW;
+		bus->el = PcmpLEVEL;
+	}
+	else if(bus->type == BusISA){
+		bus->po = PcmpHIGH;
+		bus->el = PcmpEDGE;
+		if(mpisabus != -1)
+			print("mkbus: more than one ISA bus\n");
+		mpisabus = bus->busno;
+	}
+	else{
+		bus->po = PcmpHIGH;
+		bus->el = PcmpEDGE;
+	}
+
+	return bus;
+}
+
+static Apic*
+mkioapic(PCMPioapic* p)
+{
+	void *va;
+	int apicno;
+	Apic *apic;
+
+	apicno = p->apicno;
+	if(!(p->flags & PcmpEN) || apicno > MaxAPICNO || mpioapic[apicno] != nil)
+		return 0;
+	/*
+	 * Map the I/O APIC.
+	 */
+	if((va = vmap(p->addr, 1024)) == nil)
+		return 0;
+	if((apic = xalloc(sizeof(Apic))) == nil)
+		panic("mkioapic: no memory for Apic");
+	apic->type = PcmpIOAPIC;
+	apic->apicno = apicno;
+	apic->addr = va;
+	apic->paddr = p->addr;
+	apic->flags = p->flags;
+	mpioapic[apicno] = apic;
+
+	return apic;
+}
+
+static Aintr*
+mkiointr(PCMPintr* p)
+{
+	Bus *bus;
+	Aintr *aintr;
+	PCMPintr* pcmpintr;
+
+	/*
+	 * According to the MultiProcessor Specification, a destination
+	 * I/O APIC of 0xFF means the signal is routed to all I/O APICs.
+	 * It's unclear how that can possibly be correct so treat it as
+	 * an error for now.
+	 */
+	if(p->apicno > MaxAPICNO || mpioapic[p->apicno] == nil)
+		return 0;
+	
+	if((bus = mpgetbus(p->busno)) == 0)
+		return 0;
+
+	if((aintr = xalloc(sizeof(Aintr))) == nil)
+		panic("mkiointr: no memory for Aintr");
+	aintr->intr = p;
+
+	if(0)
+		print("mkiointr: type %d intr type %d flags %#o "
+			"bus %d irq %d apicno %d intin %d\n",
+			p->type, p->intr, p->flags,
+			p->busno, p->irq, p->apicno, p->intin);
+	/*
+	 * Hack for Intel SR1520ML motherboard, which BIOS describes
+	 * the i82575 dual ethernet controllers incorrectly.
+	 */
+	if(memcmp(pcmp->product, "INTEL   X38MLST     ", 20) == 0){
+		if(p->busno == 1 && p->intin == 16 && p->irq == 1){
+			if((pcmpintr = xalloc(sizeof(PCMPintr))) == nil)
+				panic("iointr: no memory for PCMPintr");
+			memmove(pcmpintr, p, sizeof(PCMPintr));
+			print("mkiointr: %20.20s bus %d intin %d irq %d\n",
+				(char*)pcmp->product,
+				pcmpintr->busno, pcmpintr->intin,
+				pcmpintr->irq);
+			pcmpintr->intin = 17;
+			aintr->intr = pcmpintr;
+		}
+	}
+	aintr->apic = mpioapic[p->apicno];
+	aintr->next = bus->aintr;
+	bus->aintr = aintr;
+
+	return aintr;
+}
+
+static int
+mklintr(PCMPintr* p)
+{
+	Apic *apic;
+	Bus *bus;
+	int i, intin, v;
+
+	/*
+	 * The offsets of vectors for LINT[01] are known to be
+	 * 0 and 1 from the local APIC vector space at VectorLAPIC.
+	 */
+	if((bus = mpgetbus(p->busno)) == 0)
+		return 0;
+	intin = p->intin;
+
+	/*
+	 * Pentium Pros have problems if LINT[01] are set to ExtINT
+	 * so just bag it, SMP mode shouldn't need ExtINT anyway.
+	 */
+	if(p->intr == PcmpExtINT || p->intr == PcmpNMI)
+		v = ApicIMASK;
+	else
+		v = mpintrinit(bus, p, VectorLAPIC+intin, p->irq);
+
+	if(p->apicno == 0xFF){
+		for(i=0; i<=MaxAPICNO; i++){
+			if((apic = mpapic[i]) == nil)
+				continue;
+			if(apic->flags & PcmpEN)
+				apic->lintr[intin] = v;
+		}
+	}
+	else{
+		if(apic = mpapic[p->apicno])
+			if(apic->flags & PcmpEN)
+				apic->lintr[intin] = v;
+	}
+
+	return v;
+}
+
+static void
+dumpmp(uchar *p, uchar *e)
+{
+	int i;
+
+	for(i = 0; p < e; p++) {
+		if((i % 16) == 0) print("*mp%d=", i/16);
+		print("%.2x ", *p);
+		if((++i % 16) == 0) print("\n");
+	}
+	if((i % 16) != 0) print("\n");
+}
+
+
+static void
+mpoverride(uchar** newp, uchar** e)
+{
+	int size, i, j;
+	char buf[20];
+	uchar* p;
+	char* s;
+	
+	size = atoi(getconf("*mp"));
+	if(size == 0) panic("mpoverride: invalid size in *mp");
+	*newp = p = xalloc(size);
+	if(p == nil) panic("mpoverride: can't allocate memory");
+	*e = p + size;
+	for(i = 0; ; i++){
+		snprint(buf, sizeof buf, "*mp%d", i);
+		s = getconf(buf);
+		if(s == nil) break;
+		while(*s){
+			j = strtol(s, &s, 16);
+			if(*s && *s != ' ' || j < 0 || j > 0xff) panic("mpoverride: invalid entry in %s", buf);
+			if(p >= *e) panic("mpoverride: overflow in %s", buf);
+			*p++ = j;
+		}
+	}
+	if(p != *e) panic("mpoverride: size doesn't match");
+}
+
+static void
+pcmpinit(void)
+{
+	uchar *p, *e;
+	Apic *apic;
+	void *va;
+
+	/*
+	 * Map the local APIC.
+	 */
+	va = vmap(pcmp->lapicbase, 1024);
+	print("LAPIC: %.8lux %.8lux\n", pcmp->lapicbase, (ulong)va);
+	if(va == nil)
+		panic("pcmpinit: cannot map lapic %.8lux", pcmp->lapicbase);
+
+	p = ((uchar*)pcmp)+sizeof(PCMP);
+	e = ((uchar*)pcmp)+pcmp->length;
+	if(getconf("*dumpmp") != nil)
+		dumpmp(p, e);
+	if(getconf("*mp") != nil)
+		mpoverride(&p, &e);
+
+	/*
+	 * Run through the table saving information needed for starting
+	 * application processors and initialising any I/O APICs. The table
+	 * is guaranteed to be in order such that only one pass is necessary.
+	 */
+	while(p < e) switch(*p){
+	default:
+		print("pcmpinit: unknown PCMP type 0x%uX (e-p 0x%luX)\n",
+			*p, e-p);
+		while(p < e){
+			print("%uX ", *p);
+			p++;
+		}
+		break;
+
+	case PcmpPROCESSOR:
+		if(apic = mkprocessor((PCMPprocessor*)p)){
+			apic->addr = va;
+			apic->paddr = pcmp->lapicbase;
+		}
+		p += sizeof(PCMPprocessor);
+		continue;
+
+	case PcmpBUS:
+		mkbus((PCMPbus*)p);
+		p += sizeof(PCMPbus);
+		continue;
+
+	case PcmpIOAPIC:
+		if(apic = mkioapic((PCMPioapic*)p))
+			ioapicinit(apic, apic->apicno);
+		p += sizeof(PCMPioapic);
+		continue;
+
+	case PcmpIOINTR:
+		mkiointr((PCMPintr*)p);
+		p += sizeof(PCMPintr);
+		continue;
+
+	case PcmpLINTR:
+		mklintr((PCMPintr*)p);
+		p += sizeof(PCMPintr);
+		continue;
+	}
+
+	/*
+	 * Ininitalize local APIC and start application processors.
+	 */
+	mpinit();
+}
 
 static _MP_*
 mpscan(uchar *addr, int len)
@@ -60,7 +405,7 @@ PCArch archmp = {
 .id=		"_MP_",	
 .ident=		identify,
 .reset=		mpshutdown,
-.intrinit=	mpinit,
+.intrinit=	pcmpinit,
 .intrenable=	mpintrenable,
 .intron=	lapicintron,
 .introff=	lapicintroff,
@@ -72,7 +417,7 @@ static int
 identify(void)
 {
 	char *cp;
-	PCMP *pcmp;
+	_MP_ *_mp_;
 	uchar *p, sum;
 	ulong length;
 
@@ -90,50 +435,23 @@ identify(void)
 		return 1;
 
 	pcmp = KADDR(_mp_->physaddr);
-	if(memcmp(pcmp, "PCMP", 4))
+	if(memcmp(pcmp, "PCMP", 4)){
+		pcmp = nil;
 		return 1;
+	}
 
 	length = pcmp->length;
 	sum = 0;
 	for(p = (uchar*)pcmp; length; length--)
 		sum += *p++;
 
-	if(sum || (pcmp->version != 1 && pcmp->version != 4))
+	if(sum || (pcmp->version != 1 && pcmp->version != 4)){
+		pcmp = nil;
 		return 1;
+	}
 
 	if(cpuserver && m->havetsc)
 		archmp.fastclock = tscticks;
+
 	return 0;
 }
-
-Lock mpsynclock;
-
-void
-syncclock(void)
-{
-	uvlong x;
-
-	if(arch->fastclock != tscticks)
-		return;
-
-	if(m->machno == 0){
-		wrmsr(0x10, 0);
-		m->tscticks = 0;
-	} else {
-		x = MACHP(0)->tscticks;
-		while(x == MACHP(0)->tscticks)
-			;
-		wrmsr(0x10, MACHP(0)->tscticks);
-		cycles(&m->tscticks);
-	}
-}
-
-uvlong
-tscticks(uvlong *hz)
-{
-	if(hz != nil)
-		*hz = m->cpuhz;
-
-	cycles(&m->tscticks);	/* Uses the rdtsc instruction */
-	return m->tscticks;
-}

sys/src/9/pc/io.h

@@ -271,6 +271,7 @@ struct Pcidev
 	Pcidev*	list;
 	Pcidev*	link;			/* next device on this bno */
 
+	Pcidev*	parent;			/* up a bus */
 	Pcidev*	bridge;			/* down a bus */
 	struct {
 		ulong	bar;

sys/src/9/pc/mkfile

@@ -68,6 +68,7 @@ LIB=\
 	/$objtype/lib/libsec.a\
 	/$objtype/lib/libmp.a\
 	/$objtype/lib/libfis.a\
+	/$objtype/lib/libaml.a\
 
 ETHER=`{echo devether.c ether*.c | sed 's/\.c/.'$O'/g'}
 VGA=`{echo devvga.c screen.c vga*.c | sed 's/\.c/.'$O'/g'}

sys/src/9/pc/mp.c

@@ -9,209 +9,15 @@
 #include "mp.h"
 #include "apbootstrap.h"
 
-static PCMP* mppcmp;
+/* filled in by pcmpinit or acpiinit */
-static Bus* mpbus;
+Bus* mpbus;
-static Bus* mpbuslast;
+Bus* mpbuslast;
-static int mpisabus = -1;
+int mpisabus = -1;
-static int mpeisabus = -1;
+int mpeisabus = -1;
-extern int i8259elcr;			/* mask of level-triggered interrupts */
+Apic *mpioapic[MaxAPICNO+1];
-static Apic *mpioapic[MaxAPICNO+1];
+Apic *mpapic[MaxAPICNO+1];
-static Apic *mpapic[MaxAPICNO+1];
-static int mpmachno = 1;
-static Lock mpphysidlock;
-static int mpphysid;
 
-static char* buses[] = {
+int
-	"CBUSI ",
-	"CBUSII",
-	"EISA  ",
-	"FUTURE",
-	"INTERN",
-	"ISA   ",
-	"MBI   ",
-	"MBII  ",
-	"MCA   ",
-	"MPI   ",
-	"MPSA  ",
-	"NUBUS ",
-	"PCI   ",
-	"PCMCIA",
-	"TC    ",
-	"VL    ",
-	"VME   ",
-	"XPRESS",
-	0,
-};
-
-static Apic*
-mkprocessor(PCMPprocessor* p)
-{
-	int apicno;
-	Apic *apic;
-
-	apicno = p->apicno;
-	if(!(p->flags & PcmpEN) || apicno >= nelem(mpapic) || mpapic[apicno] != nil)
-		return 0;
-
-	if((apic = xalloc(sizeof(Apic))) == nil)
-		panic("mkprocessor: no memory for Apic");
-	apic->type = PcmpPROCESSOR;
-	apic->apicno = apicno;
-	apic->flags = p->flags;
-	apic->lintr[0] = ApicIMASK;
-	apic->lintr[1] = ApicIMASK;
-	if(p->flags & PcmpBP)
-		apic->machno = 0;
-	else
-		apic->machno = mpmachno++;
-	mpapic[apicno] = apic;
-
-	return apic;
-}
-
-static Bus*
-mkbus(PCMPbus* p)
-{
-	Bus *bus;
-	int i;
-
-	for(i = 0; buses[i]; i++){
-		if(strncmp(buses[i], p->string, sizeof(p->string)) == 0)
-			break;
-	}
-	if(buses[i] == 0)
-		return 0;
-
-	if((bus = xalloc(sizeof(Bus))) == nil)
-		panic("mkbus: no memory for Bus");
-	if(mpbus)
-		mpbuslast->next = bus;
-	else
-		mpbus = bus;
-	mpbuslast = bus;
-
-	bus->type = i;
-	bus->busno = p->busno;
-	if(bus->type == BusEISA){
-		bus->po = PcmpLOW;
-		bus->el = PcmpLEVEL;
-		if(mpeisabus != -1)
-			print("mkbus: more than one EISA bus\n");
-		mpeisabus = bus->busno;
-	}
-	else if(bus->type == BusPCI){
-		bus->po = PcmpLOW;
-		bus->el = PcmpLEVEL;
-	}
-	else if(bus->type == BusISA){
-		bus->po = PcmpHIGH;
-		bus->el = PcmpEDGE;
-		if(mpisabus != -1)
-			print("mkbus: more than one ISA bus\n");
-		mpisabus = bus->busno;
-	}
-	else{
-		bus->po = PcmpHIGH;
-		bus->el = PcmpEDGE;
-	}
-
-	return bus;
-}
-
-static Bus*
-mpgetbus(int busno)
-{
-	Bus *bus;
-
-	for(bus = mpbus; bus; bus = bus->next){
-		if(bus->busno == busno)
-			return bus;
-	}
-	print("mpgetbus: can't find bus %d\n", busno);
-
-	return 0;
-}
-
-static Apic*
-mkioapic(PCMPioapic* p)
-{
-	void *va;
-	int apicno;
-	Apic *apic;
-
-	apicno = p->apicno;
-	if(!(p->flags & PcmpEN) || apicno >= nelem(mpioapic) || mpioapic[apicno] != nil)
-		return 0;
-	/*
-	 * Map the I/O APIC.
-	 */
-	if((va = vmap(p->addr, 1024)) == nil)
-		return 0;
-	if((apic = xalloc(sizeof(Apic))) == nil)
-		panic("mkioapic: no memory for Apic");
-	apic->type = PcmpIOAPIC;
-	apic->apicno = apicno;
-	apic->addr = va;
-	apic->paddr = p->addr;
-	apic->flags = p->flags;
-	mpioapic[apicno] = apic;
-
-	return apic;
-}
-
-static Aintr*
-mkiointr(PCMPintr* p)
-{
-	Bus *bus;
-	Aintr *aintr;
-	PCMPintr* pcmpintr;
-
-	/*
-	 * According to the MultiProcessor Specification, a destination
-	 * I/O APIC of 0xFF means the signal is routed to all I/O APICs.
-	 * It's unclear how that can possibly be correct so treat it as
-	 * an error for now.
-	 */
-	if(p->apicno >= nelem(mpioapic) || mpioapic[p->apicno] == nil)
-		return 0;
-	
-	if((bus = mpgetbus(p->busno)) == 0)
-		return 0;
-
-	if((aintr = xalloc(sizeof(Aintr))) == nil)
-		panic("iointr: no memory for Aintr");
-	aintr->intr = p;
-
-	if(0)
-		print("iointr: type %d intr type %d flags %#o "
-			"bus %d irq %d apicno %d intin %d\n",
-			p->type, p->intr, p->flags,
-			p->busno, p->irq, p->apicno, p->intin);
-	/*
-	 * Hack for Intel SR1520ML motherboard, which BIOS describes
-	 * the i82575 dual ethernet controllers incorrectly.
-	 */
-	if(memcmp(mppcmp->product, "INTEL   X38MLST     ", 20) == 0){
-		if(p->busno == 1 && p->intin == 16 && p->irq == 1){
-			if((pcmpintr = xalloc(sizeof(PCMPintr))) == nil)
-				panic("iointr: no memory for PCMPintr");
-			memmove(pcmpintr, p, sizeof(PCMPintr));
-			print("mkiointr: %20.20s bus %d intin %d irq %d\n",
-				(char*)mppcmp->product,
-				pcmpintr->busno, pcmpintr->intin,
-				pcmpintr->irq);
-			pcmpintr->intin = 17;
-			aintr->intr = pcmpintr;
-		}
-	}
-	aintr->apic = mpioapic[p->apicno];
-	aintr->next = bus->aintr;
-	bus->aintr = aintr;
-
-	return aintr;
-}
-
-static int
 mpintrinit(Bus* bus, PCMPintr* intr, int vno, int /*irq*/)
 {
 	int el, po, v;
@@ -284,47 +90,6 @@ mpintrinit(Bus* bus, PCMPintr* intr, int vno, int /*irq*/)
 	return v;
 }
 
-static int
-mklintr(PCMPintr* p)
-{
-	Apic *apic;
-	Bus *bus;
-	int i, intin, v;
-
-	/*
-	 * The offsets of vectors for LINT[01] are known to be
-	 * 0 and 1 from the local APIC vector space at VectorLAPIC.
-	 */
-	if((bus = mpgetbus(p->busno)) == 0)
-		return 0;
-	intin = p->intin;
-
-	/*
-	 * Pentium Pros have problems if LINT[01] are set to ExtINT
-	 * so just bag it, SMP mode shouldn't need ExtINT anyway.
-	 */
-	if(p->intr == PcmpExtINT || p->intr == PcmpNMI)
-		v = ApicIMASK;
-	else
-		v = mpintrinit(bus, p, VectorLAPIC+intin, p->irq);
-
-	if(p->apicno == 0xFF){
-		for(i=0; i<nelem(mpapic); i++){
-			if((apic = mpapic[i]) == nil)
-				continue;
-			if(apic->flags & PcmpEN)
-				apic->lintr[intin] = v;
-		}
-	}
-	else{
-		if(apic = mpapic[p->apicno])
-			if(apic->flags & PcmpEN)
-				apic->lintr[intin] = v;
-	}
-
-	return v;
-}
-
 static void
 checkmtrr(void)
 {
@@ -377,6 +142,36 @@ checkmtrr(void)
 	}
 }
 
+uvlong
+tscticks(uvlong *hz)
+{
+	if(hz != nil)
+		*hz = m->cpuhz;
+
+	cycles(&m->tscticks);	/* Uses the rdtsc instruction */
+	return m->tscticks;
+}
+
+void
+syncclock(void)
+{
+	uvlong x;
+
+	if(arch->fastclock != tscticks)
+		return;
+
+	if(m->machno == 0){
+		wrmsr(0x10, 0);
+		m->tscticks = 0;
+	} else {
+		x = MACHP(0)->tscticks;
+		while(x == MACHP(0)->tscticks)
+			;
+		wrmsr(0x10, MACHP(0)->tscticks);
+		cycles(&m->tscticks);
+	}
+}
+
 static void
 squidboy(Apic* apic)
 {
@@ -483,141 +278,56 @@ mpstartap(Apic* apic)
 	nvramwrite(0x0F, 0x00);
 }
 
-static void
-dumpmp(uchar *p, uchar *e)
-{
-	int i;
-
-	for(i = 0; p < e; p++) {
-		if((i % 16) == 0) print("*mp%d=", i/16);
-		print("%.2x ", *p);
-		if((++i % 16) == 0) print("\n");
-	}
-	if((i % 16) != 0) print("\n");
-}
-
-static void
-mpoverride(uchar** newp, uchar** e)
-{
-	int size, i, j;
-	char buf[20];
-	uchar* p;
-	char* s;
-	
-	size = atoi(getconf("*mp"));
-	if(size == 0) panic("mpoverride: invalid size in *mp");
-	*newp = p = xalloc(size);
-	if(p == nil) panic("mpoverride: can't allocate memory");
-	*e = p + size;
-	for(i = 0; ; i++){
-		snprint(buf, sizeof buf, "*mp%d", i);
-		s = getconf(buf);
-		if(s == nil) break;
-		while(*s){
-			j = strtol(s, &s, 16);
-			if(*s && *s != ' ' || j < 0 || j > 0xff) panic("mpoverride: invalid entry in %s", buf);
-			if(p >= *e) panic("mpoverride: overflow in %s", buf);
-			*p++ = j;
-		}
-	}
-	if(p != *e) panic("mpoverride: size doesn't match");
-}
-
 void
 mpinit(void)
 {
 	int ncpu, i;
+	Apic *apic;
 	char *cp;
-	PCMP *pcmp;
-	uchar *e, *p;
-	Apic *apic, *bpapic;
-	void *va;
 
 	i8259init();
 	syncclock();
 
-	if(_mp_ == 0)
+	if(getconf("*apicdebug")){
-		return;
+		Bus *b;
-	pcmp = KADDR(_mp_->physaddr);
+		Aintr *ai;
+		PCMPintr *pi;
 
-	/*
+		for(i=0; i<=MaxAPICNO; i++){
-	 * Map the local APIC.
+			if(apic = mpapic[i])
-	 */
+				print("LAPIC%d: pa=%lux va=%lux flags=%x\n",
-	if((va = vmap(pcmp->lapicbase, 1024)) == nil)
+					i, apic->paddr, (ulong)apic->addr, apic->flags);
-		return;
+			if(apic = mpioapic[i])
-	mppcmp = pcmp;
+				print("IOAPIC%d: pa=%lux va=%lux flags=%x gsibase=%d mre=%d\n",
-	print("LAPIC: %.8lux %.8lux\n", pcmp->lapicbase, (ulong)va);
+					i, apic->paddr, (ulong)apic->addr, apic->flags, apic->gsibase, apic->mre);
-
-	bpapic = nil;
-
-	/*
-	 * Run through the table saving information needed for starting
-	 * application processors and initialising any I/O APICs. The table
-	 * is guaranteed to be in order such that only one pass is necessary.
-	 */
-	p = ((uchar*)pcmp)+sizeof(PCMP);
-	e = ((uchar*)pcmp)+pcmp->length;
-	if(getconf("*dumpmp") != nil)
-		dumpmp(p, e);
-	if(getconf("*mp") != nil)
-		mpoverride(&p, &e);
-	while(p < e) switch(*p){
-	default:
-		print("mpinit: unknown PCMP type 0x%uX (e-p 0x%luX)\n",
-			*p, e-p);
-		while(p < e){
-			print("%uX ", *p);
-			p++;
 		}
+		for(b = mpbus; b; b = b->next){
+			print("BUS%d type=%d flags=%x\n", b->busno, b->type, b->po|b->el);
+			for(ai = b->aintr; ai; ai = ai->next){
+				if(pi = ai->intr)
+					print("\ttype=%d irq=%d (%d [%c]) apic=%d intin=%d flags=%x\n",
+						pi->type, pi->irq, pi->irq>>2, "ABCD"[pi->irq&3],
+						pi->apicno, pi->intin, pi->flags);
+			}
+		}
+	}
+
+	apic = nil;
+	for(i=0; i<=MaxAPICNO; i++){
+		if(mpapic[i] == nil)
+			continue;
+		if(mpapic[i]->flags & PcmpBP){
+			apic = mpapic[i];
 			break;
-
-	case PcmpPROCESSOR:
-		if(apic = mkprocessor((PCMPprocessor*)p)){
-			/*
-			 * Must take a note of bootstrap processor APIC
-			 * now as it will be needed in order to start the
-			 * application processors later and there's no
-			 * guarantee that the bootstrap processor appears
-			 * first in the table before the others.
-			 */
-			apic->addr = va;
-			apic->paddr = pcmp->lapicbase;
-			if(apic->flags & PcmpBP)
-				bpapic = apic;
 		}
-		p += sizeof(PCMPprocessor);
-		continue;
-
-	case PcmpBUS:
-		mkbus((PCMPbus*)p);
-		p += sizeof(PCMPbus);
-		continue;
-
-	case PcmpIOAPIC:
-		if(apic = mkioapic((PCMPioapic*)p))
-			ioapicinit(apic, ((PCMPioapic*)p)->apicno);
-		p += sizeof(PCMPioapic);
-		continue;
-
-	case PcmpIOINTR:
-		mkiointr((PCMPintr*)p);
-		p += sizeof(PCMPintr);
-		continue;
-
-	case PcmpLINTR:
-		mklintr((PCMPintr*)p);
-		p += sizeof(PCMPintr);
-		continue;
 	}
 
-	/*
+	if(apic == nil){
-	 * No bootstrap processor, no need to go further.
+		panic("mpinit: no bootstrap processor");
-	 */
-	if(bpapic == 0)
 		return;
-	bpapic->online = 1;
+	}
-
+	apic->online = 1;
-	lapicinit(bpapic);
+	lapicinit(apic);
 
 	/*
 	 * These interrupts are local to the processor
@@ -670,6 +380,8 @@ mpinit(void)
 static int
 mpintrcpu(void)
 {
+	static Lock physidlock;
+	static int physid;
 	int i;
 
 	/*
@@ -689,17 +401,17 @@ mpintrcpu(void)
 	 * to more than one thread in a core, or to use a "noise" core.
 	 * But, as usual, Intel make that an onerous task. 
 	 */
-	lock(&mpphysidlock);
+	lock(&physidlock);
 	for(;;){
-		i = mpphysid++;
+		i = physid++;
-		if(mpphysid >= nelem(mpapic))
+		if(physid >= nelem(mpapic))
-			mpphysid = 0;
+			physid = 0;
 		if(mpapic[i] == nil)
 			continue;
 		if(mpapic[i]->online)
 			break;
 	}
-	unlock(&mpphysidlock);
+	unlock(&physidlock);
 
 	return mpapic[i]->apicno;
 }
@@ -741,23 +453,41 @@ mpintrenablex(Vctl* v, int tbdf)
 	Aintr *aintr;
 	Apic *apic;
 	Pcidev *pcidev;
-	int bno, dno, hi, irq, lo, n, type, vno;
+	int bno, dno, pin, hi, irq, lo, n, type, vno;
 
-	/*
-	 * Find the bus.
-	 */
 	type = BUSTYPE(tbdf);
 	bno = BUSBNO(tbdf);
 	dno = BUSDNO(tbdf);
-	if(type == BusISA)
+
+	pin = 0;
+	pcidev = nil;
+	if(type == BusPCI){
+		if(pcidev = pcimatchtbdf(tbdf))
+			pin = pcicfgr8(pcidev, PciINTP);
+	} else if(type == BusISA)
 		bno = mpisabus;
+
+Findbus:
 	for(bus = mpbus; bus != nil; bus = bus->next){
 		if(bus->type != type)
 			continue;
 		if(bus->busno == bno)
 			break;
 	}
+
 	if(bus == nil){
+		/*
+		 * if the PCI device is behind a PCI-PCI bridge thats not described
+		 * by the MP or ACPI tables then walk up the bus translating interrupt
+		 * pin to parent bus.
+		 */
+		if(pcidev && pcidev->parent && pin > 0){
+			pin = ((dno+(pin-1))%4)+1;
+			pcidev = pcidev->parent;
+			bno = BUSBNO(pcidev->tbdf);
+			dno = BUSDNO(pcidev->tbdf);
+			goto Findbus;
+		}
 		print("mpintrenable: can't find bus type %d, number %d\n", type, bno);
 		return -1;
 	}
@@ -765,13 +495,11 @@ mpintrenablex(Vctl* v, int tbdf)
 	/*
 	 * For PCI devices the interrupt pin (INT[ABCD]) and device
 	 * number are encoded into the entry irq field, so create something
-	 * to match on. The interrupt pin used by the device has to be
+	 * to match on.
-	 * obtained from the PCI config space.
 	 */
 	if(bus->type == BusPCI){
-		pcidev = pcimatchtbdf(tbdf);
+		if(pin > 0)
-		if(pcidev != nil && (n = pcicfgr8(pcidev, PciINTP)) != 0)
+			irq = (dno<<2)|(pin-1);
-			irq = (dno<<2)|(n-1);
 		else
 			irq = -1;
 	}
@@ -932,15 +660,16 @@ mpintrenable(Vctl* v)
 	return -1;
 }
 
-static Lock mpshutdownlock;
 
 void
 mpshutdown(void)
 {
+	static Lock shutdownlock;
+
 	/*
 	 * To be done...
 	 */
-	if(!canlock(&mpshutdownlock)){
+	if(!canlock(&shutdownlock)){
 		/*
 		 * If this processor received the CTRL-ALT-DEL from
 		 * the keyboard, acknowledge it. Send an INIT to self.

sys/src/9/pc/mp.h

@@ -162,6 +162,7 @@ typedef struct Apic {
 
 	Lock;				/* I/O APIC: register access */
 	int	mre;			/* I/O APIC: maximum redirection entry */
+	int	gsibase;		/* I/O APIC: global system interrupt base (acpi) */
 
 	int	lintr[2];		/* Local APIC */
 	int	machno;
@@ -228,8 +229,14 @@ extern void lapicspurious(Ureg*, void*);
 extern void lapicstartap(Apic*, int);
 extern void lapictimerset(uvlong);
 
+extern int mpintrinit(Bus*, PCMPintr*, int, int);
 extern void mpinit(void);
 extern int mpintrenable(Vctl*);
 extern void mpshutdown(void);
 
-extern _MP_ *_mp_;
+extern Bus* mpbus;
+extern Bus* mpbuslast;
+extern int mpisabus;
+extern int mpeisabus;
+extern Apic *mpioapic[];
+extern Apic *mpapic[];

sys/src/9/pc/pccpuf

@@ -41,7 +41,6 @@ link
 	devpccard
 	devi82365
 	cputemp
-	acpi
 	apm		apmjump
 	ether2000	ether8390
 	ether2114x	pci
@@ -79,6 +78,7 @@ link
 	audiohda
 
 misc
+	archacpi	mp apic
 	archmp		mp apic
 	mtrr
 

sys/src/9/pc/pcf

@@ -42,7 +42,6 @@ link
 	devpccard
 	devi82365
 	cputemp
-	acpi
 	apm		apmjump
 	ether2000	ether8390
 	ether2114x	pci
@@ -81,6 +80,7 @@ link
 	audiohda
 
 misc
+	archacpi	mp apic
 	archmp		mp apic
 	mtrr
 

sys/src/9/pc/pci.c

@@ -367,7 +367,7 @@ pcibusmap(Pcidev *root, ulong *pmema, ulong *pioa, int wrreg)
 }
 
 static int
-pcilscan(int bno, Pcidev** list)
+pcilscan(int bno, Pcidev** list, Pcidev *parent)
 {
 	Pcidev *p, *head, *tail;
 	int dno, fno, i, hdt, l, maxfno, maxubn, rno, sbn, tbdf, ubn;
@@ -453,6 +453,7 @@ pcilscan(int bno, Pcidev** list)
 				break;
 			}
 
+			p->parent = parent;
 			if(head != nil)
 				tail->link = p;
 			else
@@ -494,7 +495,7 @@ pcilscan(int bno, Pcidev** list)
 			l = (MaxUBN<<16)|(sbn<<8)|bno;
 			pcicfgw32(p, PciPBN, l);
 			pcicfgw16(p, PciSPSR, 0xFFFF);
-			maxubn = pcilscan(sbn, &p->bridge);
+			maxubn = pcilscan(sbn, &p->bridge, p);
 			l = (maxubn<<16)|(sbn<<8)|bno;
 
 			pcicfgw32(p, PciPBN, l);
@@ -502,7 +503,7 @@ pcilscan(int bno, Pcidev** list)
 		else {
 			if(ubn > maxubn)
 				maxubn = ubn;
-			pcilscan(sbn, &p->bridge);
+			pcilscan(sbn, &p->bridge, p);
 		}
 	}
 
@@ -515,7 +516,7 @@ pciscan(int bno, Pcidev **list)
 	int ubn;
 
 	lock(&pcicfginitlock);
-	ubn = pcilscan(bno, list);
+	ubn = pcilscan(bno, list, nil);
 	unlock(&pcicfginitlock);
 	return ubn;
 }
@@ -1004,7 +1005,7 @@ pcicfginit(void)
 	list = &pciroot;
 	for(bno = 0; bno <= pcimaxbno; bno++) {
 		int sbno = bno;
-		bno = pcilscan(bno, list);
+		bno = pcilscan(bno, list, nil);
 
 		while(*list)
 			list = &(*list)->link;

sys/src/libaml/mkfile

@@ -0,0 +1,15 @@
+</$objtype/mkfile
+
+LIB=/$objtype/lib/libaml.a
+OFILES=\
+	aml.$O\
+
+HFILES=/sys/include/aml.h
+
+UPDATE=\
+	mkfile\
+	$HFILES\
+	${OFILES:%.$O=%.c}\
+	${LIB:/$objtype/%=/386/%}\
+
+</sys/src/cmd/mksyslib