3 * Needs a massive rewrite.
6 #include "../port/lib.h"
11 #include "../port/error.h"
13 #define DBG if(0) pcilog
22 pcilog(char *fmt, ...)
29 n = vseprint(buf, buf+sizeof(buf), fmt, arg) - buf;
32 memmove(PCICONS.output+PCICONS.ptr, buf, n);
38 { /* configuration mechanism #1 */
39 PciADDR = 0xCF8, /* CONFIG_ADDRESS */
40 PciDATA = 0xCFC, /* CONFIG_DATA */
42 /* configuration mechanism #2 */
43 PciCSE = 0xCF8, /* configuration space enable */
44 PciFORWARD = 0xCFA, /* which bus */
51 { /* command register */
60 static Lock pcicfglock;
61 static Lock pcicfginitlock;
62 static int pcicfgmode = -1;
63 static int pcimaxbno = 255;
65 static Pcidev* pciroot;
66 static Pcidev* pcilist;
67 static Pcidev* pcitail;
68 static int nobios, nopcirouting;
69 static BIOS32si* pcibiossi;
71 static int pcicfgrw8raw(int, int, int, int);
72 static int pcicfgrw16raw(int, int, int, int);
73 static int pcicfgrw32raw(int, int, int, int);
75 static int (*pcicfgrw8)(int, int, int, int) = pcicfgrw8raw;
76 static int (*pcicfgrw16)(int, int, int, int) = pcicfgrw16raw;
77 static int (*pcicfgrw32)(int, int, int, int) = pcicfgrw32raw;
79 static char* bustypes[] = {
107 if((p = malloc(READSTR)) == nil)
108 return fmtstrcpy(fmt, "(tbdfconv)");
112 tbdf = va_arg(fmt->args, int);
113 if(tbdf == BUSUNKNOWN)
114 snprint(p, READSTR, "unknown");
116 type = BUSTYPE(tbdf);
117 if(type < nelem(bustypes))
118 l = snprint(p, READSTR, bustypes[type]);
120 l = snprint(p, READSTR, "%d", type);
121 snprint(p+l, READSTR-l, ".%d.%d.%d",
122 BUSBNO(tbdf), BUSDNO(tbdf), BUSFNO(tbdf));
127 snprint(p, READSTR, "(tbdfconv)");
130 r = fmtstrcpy(fmt, p);
137 pcibarsize(Pcidev *p, int rno)
141 v = pcicfgrw32(p->tbdf, rno, 0, 1);
142 pcicfgrw32(p->tbdf, rno, 0xFFFFFFF0, 0);
143 size = pcicfgrw32(p->tbdf, rno, 0, 1);
146 pcicfgrw32(p->tbdf, rno, v, 0);
148 return -(size & ~0x0F);
152 pcisizcmp(void *a, void *b)
158 return aa->siz - bb->siz;
167 for(m = 1<<(m-1); m != 0; m >>= 1) {
181 pcibusmap(Pcidev *root, ulong *pmema, ulong *pioa, int wrreg)
184 int ntb, i, size, rno, hole;
185 ulong v, mema, ioa, sioa, smema, base, limit;
186 Pcisiz *table, *tptr, *mtb, *itb;
194 DBG("pcibusmap wr=%d %T mem=%luX io=%luX\n",
195 wrreg, root->tbdf, mema, ioa);
198 for(p = root; p != nil; p = p->link)
201 ntb *= (PciCIS-PciBAR0)/4;
202 table = malloc(2*ntb*sizeof(Pcisiz));
204 panic("pcibusmap: can't allocate memory");
209 * Build a table of sizes
211 for(p = root; p != nil; p = p->link) {
212 if(p->ccrb == 0x06) {
213 if(p->ccru != 0x04 || p->bridge == nil) {
214 // DBG("pci: ignored bridge %T\n", p->tbdf);
220 pcibusmap(p->bridge, &smema, &sioa, 0);
222 hole = pcimask(smema-mema);
227 hole = pcimask(sioa-ioa);
235 itb->siz = p->ioa.size;
240 mtb->siz = p->mema.size;
245 for(i = 0; i <= 5; i++) {
247 v = pcicfgrw32(p->tbdf, rno, 0, 1);
248 size = pcibarsize(p, rno);
265 p->mem[i].size = size;
270 * Sort both tables IO smallest first, Memory largest
272 qsort(table, itb-table, sizeof(Pcisiz), pcisizcmp);
274 qsort(tptr, mtb-tptr, sizeof(Pcisiz), pcisizcmp);
277 * Allocate IO address space on this bus
279 for(tptr = table; tptr < itb; tptr++) {
283 ioa = (ioa+hole-1) & ~(hole-1);
290 p->mem[tptr->bar].bar = ioa|1;
292 pcicfgrw32(p->tbdf, PciBAR0+(tptr->bar*4), ioa|1, 0);
299 * Allocate Memory address space on this bus
301 for(tptr = table+ntb; tptr < mtb; tptr++) {
305 mema = (mema+hole-1) & ~(hole-1);
312 p->mem[tptr->bar].bar = mema;
314 pcicfgrw32(p->tbdf, PciBAR0+(tptr->bar*4), mema, 0);
327 * Finally set all the bridge addresses & registers
329 for(p = root; p != nil; p = p->link) {
330 if(p->bridge == nil) {
331 pcicfgrw8(p->tbdf, PciLTR, 64, 0);
334 pcicfgrw16(p->tbdf, PciPCR, p->pcr, 0);
339 limit = base+p->ioa.size-1;
340 v = pcicfgrw32(p->tbdf, PciIBR, 0, 1);
341 v = (v&0xFFFF0000)|(limit & 0xF000)|((base & 0xF000)>>8);
342 pcicfgrw32(p->tbdf, PciIBR, v, 0);
343 v = (limit & 0xFFFF0000)|(base>>16);
344 pcicfgrw32(p->tbdf, PciIUBR, v, 0);
347 limit = base+p->mema.size-1;
348 v = (limit & 0xFFF00000)|((base & 0xFFF00000)>>16);
349 pcicfgrw32(p->tbdf, PciMBR, v, 0);
352 * Disable memory prefetch
354 pcicfgrw32(p->tbdf, PciPMBR, 0x0000FFFF, 0);
355 pcicfgrw8(p->tbdf, PciLTR, 64, 0);
360 p->pcr |= IOen|MEMen|MASen;
361 pcicfgrw32(p->tbdf, PciPCR, 0xFFFF0000|p->pcr , 0);
365 pcibusmap(p->bridge, &smema, &sioa, 1);
370 pcilscan(int bno, Pcidev** list)
372 Pcidev *p, *head, *tail;
373 int dno, fno, i, hdt, l, maxfno, maxubn, rno, sbn, tbdf, ubn;
378 for(dno = 0; dno <= pcimaxdno; dno++){
380 for(fno = 0; fno <= maxfno; fno++){
382 * For this possible device, form the
383 * bus+device+function triplet needed to address it
384 * and try to read the vendor and device ID.
385 * If successful, allocate a device struct and
386 * start to fill it in with some useful information
387 * from the device's configuration space.
389 tbdf = MKBUS(BusPCI, bno, dno, fno);
390 l = pcicfgrw32(tbdf, PciVID, 0, 1);
391 if(l == 0xFFFFFFFF || l == 0)
393 p = malloc(sizeof(*p));
395 panic("pcilscan: can't allocate memory");
406 p->pcr = pcicfgr16(p, PciPCR);
407 p->rid = pcicfgr8(p, PciRID);
408 p->ccrp = pcicfgr8(p, PciCCRp);
409 p->ccru = pcicfgr8(p, PciCCRu);
410 p->ccrb = pcicfgr8(p, PciCCRb);
411 p->cls = pcicfgr8(p, PciCLS);
412 p->ltr = pcicfgr8(p, PciLTR);
414 p->intl = pcicfgr8(p, PciINTL);
417 * If the device is a multi-function device adjust the
418 * loop count so all possible functions are checked.
420 hdt = pcicfgr8(p, PciHDT);
425 * If appropriate, read the base address registers
426 * and work out the sizes.
429 case 0x01: /* mass storage controller */
430 case 0x02: /* network controller */
431 case 0x03: /* display controller */
432 case 0x04: /* multimedia device */
433 case 0x07: /* simple comm. controllers */
434 case 0x08: /* base system peripherals */
435 case 0x09: /* input devices */
436 case 0x0A: /* docking stations */
437 case 0x0B: /* processors */
438 case 0x0C: /* serial bus controllers */
439 if((hdt & 0x7F) != 0)
442 for(i = 0; i < nelem(p->mem); i++) {
444 p->mem[i].bar = pcicfgr32(p, rno);
445 p->mem[i].size = pcibarsize(p, rno);
450 case 0x05: /* memory controller */
451 case 0x06: /* bridge device */
465 for(p = head; p != nil; p = p->link){
467 * Find PCI-PCI bridges and recursively descend the tree.
469 if(p->ccrb != 0x06 || p->ccru != 0x04)
473 * If the secondary or subordinate bus number is not
474 * initialised try to do what the PCI BIOS should have
475 * done and fill in the numbers as the tree is descended.
476 * On the way down the subordinate bus number is set to
477 * the maximum as it's not known how many buses are behind
478 * this one; the final value is set on the way back up.
480 sbn = pcicfgr8(p, PciSBN);
481 ubn = pcicfgr8(p, PciUBN);
483 if(sbn == 0 || ubn == 0 || nobios) {
486 * Make sure memory, I/O and master enables are
487 * off, set the primary, secondary and subordinate
488 * bus numbers and clear the secondary status before
489 * attempting to scan the secondary bus.
491 * Initialisation of the bridge should be done here.
493 pcicfgw32(p, PciPCR, 0xFFFF0000);
494 l = (MaxUBN<<16)|(sbn<<8)|bno;
495 pcicfgw32(p, PciPBN, l);
496 pcicfgw16(p, PciSPSR, 0xFFFF);
497 maxubn = pcilscan(sbn, &p->bridge);
498 l = (maxubn<<16)|(sbn<<8)|bno;
500 pcicfgw32(p, PciPBN, l);
505 pcilscan(sbn, &p->bridge);
513 pciscan(int bno, Pcidev **list)
517 lock(&pcicfginitlock);
518 ubn = pcilscan(bno, list);
519 unlock(&pcicfginitlock);
524 pIIxget(Pcidev *router, uchar link)
528 /* link should be 0x60, 0x61, 0x62, 0x63 */
529 pirq = pcicfgr8(router, link);
530 return (pirq < 16)? pirq: 0;
534 pIIxset(Pcidev *router, uchar link, uchar irq)
536 pcicfgw8(router, link, irq);
540 viaget(Pcidev *router, uchar link)
544 /* link should be 1, 2, 3, 5 */
545 pirq = (link < 6)? pcicfgr8(router, 0x55 + (link>>1)): 0;
547 return (link & 1)? (pirq >> 4): (pirq & 15);
551 viaset(Pcidev *router, uchar link, uchar irq)
555 pirq = pcicfgr8(router, 0x55 + (link >> 1));
556 pirq &= (link & 1)? 0x0f: 0xf0;
557 pirq |= (link & 1)? (irq << 4): (irq & 15);
558 pcicfgw8(router, 0x55 + (link>>1), pirq);
562 optiget(Pcidev *router, uchar link)
566 /* link should be 0x02, 0x12, 0x22, 0x32 */
567 if ((link & 0xcf) == 0x02)
568 pirq = pcicfgr8(router, 0xb8 + (link >> 5));
569 return (link & 0x10)? (pirq >> 4): (pirq & 15);
573 optiset(Pcidev *router, uchar link, uchar irq)
577 pirq = pcicfgr8(router, 0xb8 + (link >> 5));
578 pirq &= (link & 0x10)? 0x0f : 0xf0;
579 pirq |= (link & 0x10)? (irq << 4): (irq & 15);
580 pcicfgw8(router, 0xb8 + (link >> 5), pirq);
584 aliget(Pcidev *router, uchar link)
586 /* No, you're not dreaming */
587 static const uchar map[] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 };
590 /* link should be 0x01..0x08 */
591 pirq = pcicfgr8(router, 0x48 + ((link-1)>>1));
592 return (link & 1)? map[pirq&15]: map[pirq>>4];
596 aliset(Pcidev *router, uchar link, uchar irq)
598 /* Inverse of map in aliget */
599 static const uchar map[] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 };
602 pirq = pcicfgr8(router, 0x48 + ((link-1)>>1));
603 pirq &= (link & 1)? 0x0f: 0xf0;
604 pirq |= (link & 1)? (map[irq] << 4): (map[irq] & 15);
605 pcicfgw8(router, 0x48 + ((link-1)>>1), pirq);
609 cyrixget(Pcidev *router, uchar link)
613 /* link should be 1, 2, 3, 4 */
614 pirq = pcicfgr8(router, 0x5c + ((link-1)>>1));
615 return ((link & 1)? pirq >> 4: pirq & 15);
619 cyrixset(Pcidev *router, uchar link, uchar irq)
623 pirq = pcicfgr8(router, 0x5c + (link>>1));
624 pirq &= (link & 1)? 0x0f: 0xf0;
625 pirq |= (link & 1)? (irq << 4): (irq & 15);
626 pcicfgw8(router, 0x5c + (link>>1), pirq);
629 typedef struct Bridge Bridge;
634 uchar (*get)(Pcidev *, uchar);
635 void (*set)(Pcidev *, uchar, uchar);
638 static Bridge southbridges[] = {
639 { 0x8086, 0x122e, pIIxget, pIIxset }, /* Intel 82371FB */
640 { 0x8086, 0x1234, pIIxget, pIIxset }, /* Intel 82371MX */
641 { 0x8086, 0x7000, pIIxget, pIIxset }, /* Intel 82371SB */
642 { 0x8086, 0x7110, pIIxget, pIIxset }, /* Intel 82371AB */
643 { 0x8086, 0x7198, pIIxget, pIIxset }, /* Intel 82443MX (fn 1) */
644 { 0x8086, 0x2410, pIIxget, pIIxset }, /* Intel 82801AA */
645 { 0x8086, 0x2420, pIIxget, pIIxset }, /* Intel 82801AB */
646 { 0x8086, 0x2440, pIIxget, pIIxset }, /* Intel 82801BA */
647 { 0x8086, 0x2448, pIIxget, pIIxset }, /* Intel 82801BAM/CAM/DBM */
648 { 0x8086, 0x244c, pIIxget, pIIxset }, /* Intel 82801BAM */
649 { 0x8086, 0x244e, pIIxget, pIIxset }, /* Intel 82801 */
650 { 0x8086, 0x2480, pIIxget, pIIxset }, /* Intel 82801CA */
651 { 0x8086, 0x248c, pIIxget, pIIxset }, /* Intel 82801CAM */
652 { 0x8086, 0x24c0, pIIxget, pIIxset }, /* Intel 82801DBL */
653 { 0x8086, 0x24cc, pIIxget, pIIxset }, /* Intel 82801DBM */
654 { 0x8086, 0x24d0, pIIxget, pIIxset }, /* Intel 82801EB */
655 { 0x8086, 0x25a1, pIIxget, pIIxset }, /* Intel 6300ESB */
656 { 0x8086, 0x2640, pIIxget, pIIxset }, /* Intel 82801FB */
657 { 0x8086, 0x2641, pIIxget, pIIxset }, /* Intel 82801FBM */
658 { 0x8086, 0x2670, pIIxget, pIIxset }, /* Intel 632xesb */
659 { 0x8086, 0x27b8, pIIxget, pIIxset }, /* Intel 82801GB */
660 { 0x8086, 0x27b9, pIIxget, pIIxset }, /* Intel 82801GBM */
661 { 0x8086, 0x2810, pIIxget, pIIxset }, /* Intel 82801HB/HR (ich8/r) */
662 { 0x8086, 0x2812, pIIxget, pIIxset }, /* Intel 82801HH (ich8dh) */
663 { 0x8086, 0x2912, pIIxget, pIIxset }, /* Intel 82801ih ich9dh */
664 { 0x8086, 0x2914, pIIxget, pIIxset }, /* Intel 82801io ich9do */
665 { 0x8086, 0x2916, pIIxget, pIIxset }, /* Intel 82801ibr ich9r */
666 { 0x8086, 0x2917, pIIxget, pIIxset }, /* Intel 82801iem ich9m-e */
667 { 0x8086, 0x2918, pIIxget, pIIxset }, /* Intel 82801ib ich9 */
668 { 0x8086, 0x2919, pIIxget, pIIxset }, /* Intel 82801? ich9m */
669 { 0x8086, 0x3a16, pIIxget, pIIxset }, /* Intel 82801jir ich10r */
670 { 0x8086, 0x3a40, pIIxget, pIIxset }, /* Intel 82801ji */
671 { 0x8086, 0x3a42, pIIxget, pIIxset }, /* Intel 82801ji */
672 { 0x8086, 0x3a48, pIIxget, pIIxset }, /* Intel 82801ji */
673 { 0x8086, 0x3b06, pIIxget, pIIxset }, /* Intel 82801? ibex peak */
674 { 0x8086, 0x3b14, pIIxget, pIIxset }, /* Intel 82801? 3420 */
675 { 0x8086, 0x1c54, pIIxget, pIIxset }, /* Intel 82q67 cougar point pch */
676 { 0x1106, 0x0586, viaget, viaset }, /* Viatech 82C586 */
677 { 0x1106, 0x0596, viaget, viaset }, /* Viatech 82C596 */
678 { 0x1106, 0x0686, viaget, viaset }, /* Viatech 82C686 */
679 { 0x1106, 0x3227, viaget, viaset }, /* Viatech VT8237 */
680 { 0x1106, 0x8410, viaget, viaset }, /* Viatech PV530 bridge */
681 { 0x1045, 0xc700, optiget, optiset }, /* Opti 82C700 */
682 { 0x10b9, 0x1533, aliget, aliset }, /* Al M1533 */
683 { 0x1039, 0x0008, pIIxget, pIIxset }, /* SI 503 */
684 { 0x1039, 0x0496, pIIxget, pIIxset }, /* SI 496 */
685 { 0x1078, 0x0100, cyrixget, cyrixset }, /* Cyrix 5530 Legacy */
687 { 0x1022, 0x746B, nil, nil }, /* AMD 8111 */
688 { 0x10DE, 0x00D1, nil, nil }, /* NVIDIA nForce 3 */
689 { 0x10DE, 0x00E0, nil, nil }, /* NVIDIA nForce 3 250 Series */
690 { 0x10DE, 0x00E1, nil, nil }, /* NVIDIA nForce 3 250 Series */
691 { 0x1166, 0x0200, nil, nil }, /* ServerWorks ServerSet III LE */
692 { 0x1002, 0x4377, nil, nil }, /* ATI Radeon Xpress 200M */
693 { 0x1002, 0x4372, nil, nil }, /* ATI SB400 */
694 { 0x1002, 0x9601, nil, nil }, /* AMD SB710 */
695 { 0x1002, 0x438D, nil, nil }, /* AMD SB600 */
698 typedef struct Slot Slot;
700 uchar bus; /* Pci bus number */
701 uchar dev; /* Pci device number */
702 uchar maps[12]; /* Avoid structs! Link and mask. */
703 uchar slot; /* Add-in/built-in slot */
707 typedef struct Router Router;
709 uchar signature[4]; /* Routing table signature */
710 uchar version[2]; /* Version number */
711 uchar size[2]; /* Total table size */
712 uchar bus; /* Interrupt router bus number */
713 uchar devfn; /* Router's devfunc */
714 uchar pciirqs[2]; /* Exclusive PCI irqs */
715 uchar compat[4]; /* Compatible PCI interrupt router */
716 uchar miniport[4]; /* Miniport data */
721 static ushort pciirqs; /* Exclusive PCI irqs */
722 static Bridge *southbridge; /* Which southbridge to use. */
729 int size, i, fn, tbdf;
731 uchar *p, pin, irq, link, *map;
733 /* Search for PCI interrupt routing table in BIOS */
734 for(p = (uchar *)KADDR(0xf0000); p < (uchar *)KADDR(0xfffff); p += 16)
735 if(p[0] == '$' && p[1] == 'P' && p[2] == 'I' && p[3] == 'R')
738 if(p >= (uchar *)KADDR(0xfffff))
743 // print("PCI interrupt routing table version %d.%d at %.6uX\n",
744 // r->version[0], r->version[1], (ulong)r & 0xfffff);
746 tbdf = (BusPCI << 24)|(r->bus << 16)|(r->devfn << 8);
747 sbpci = pcimatchtbdf(tbdf);
749 print("pcirouting: Cannot find south bridge %T\n", tbdf);
753 for(i = 0; i != nelem(southbridges); i++)
754 if(sbpci->vid == southbridges[i].vid && sbpci->did == southbridges[i].did)
757 if(i == nelem(southbridges)) {
758 print("pcirouting: ignoring south bridge %T %.4uX/%.4uX\n", tbdf, sbpci->vid, sbpci->did);
761 southbridge = &southbridges[i];
762 if(southbridge->get == nil || southbridge->set == nil)
765 pciirqs = (r->pciirqs[1] << 8)|r->pciirqs[0];
767 size = (r->size[1] << 8)|r->size[0];
768 for(e = (Slot *)&r[1]; (uchar *)e < p + size; e++) {
770 print("%.2uX/%.2uX %.2uX: ", e->bus, e->dev, e->slot);
771 for (i = 0; i != 4; i++) {
772 uchar *m = &e->maps[i * 3];
773 print("[%d] %.2uX %.4uX ",
774 i, m[0], (m[2] << 8)|m[1]);
778 for(fn = 0; fn != 8; fn++) {
779 tbdf = (BusPCI << 24)|(e->bus << 16)|((e->dev | fn) << 8);
780 pci = pcimatchtbdf(tbdf);
783 pin = pcicfgr8(pci, PciINTP);
784 if(pin == 0 || pin == 0xff)
787 map = &e->maps[(pin - 1) * 3];
789 irq = southbridge->get(sbpci, link);
790 if(irq == 0 || irq == pci->intl)
792 if(pci->intl != 0 && pci->intl != 0xFF) {
793 print("pcirouting: BIOS workaround: %T at pin %d link %d irq %d -> %d\n",
794 tbdf, pin, link, irq, pci->intl);
795 southbridge->set(sbpci, link, pci->intl);
798 print("pcirouting: %T at pin %d link %d irq %d\n", tbdf, pin, link, irq);
799 pcicfgw8(pci, PciINTL, irq);
805 static void pcireservemem(void);
808 pcicfgrw8bios(int tbdf, int rno, int data, int read)
815 memset(&ci, 0, sizeof(BIOS32ci));
816 ci.ebx = (BUSBNO(tbdf)<<8)|(BUSDNO(tbdf)<<3)|BUSFNO(tbdf);
820 if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
821 return ci.ecx & 0xFF;
825 ci.ecx = data & 0xFF;
826 if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
834 pcicfgrw16bios(int tbdf, int rno, int data, int read)
841 memset(&ci, 0, sizeof(BIOS32ci));
842 ci.ebx = (BUSBNO(tbdf)<<8)|(BUSDNO(tbdf)<<3)|BUSFNO(tbdf);
846 if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
847 return ci.ecx & 0xFFFF;
851 ci.ecx = data & 0xFFFF;
852 if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
860 pcicfgrw32bios(int tbdf, int rno, int data, int read)
867 memset(&ci, 0, sizeof(BIOS32ci));
868 ci.ebx = (BUSBNO(tbdf)<<8)|(BUSDNO(tbdf)<<3)|BUSFNO(tbdf);
872 if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
878 if(!bios32ci(pcibiossi, &ci)/* && !(ci.eax & 0xFF)*/)
891 if((si = bios32open("$PCI")) == nil)
894 memset(&ci, 0, sizeof(BIOS32ci));
896 if(bios32ci(si, &ci) || ci.edx != ((' '<<24)|('I'<<16)|('C'<<8)|'P')){
904 pcimaxbno = ci.ecx & 0xff;
910 pcibussize(Pcidev *root, ulong *msize, ulong *iosize)
914 pcibusmap(root, msize, iosize, 0);
925 lock(&pcicfginitlock);
930 if(getconf("*nobios"))
932 else if(getconf("*pcibios"))
934 if(getconf("*nopcirouting"))
938 * Try to determine which PCI configuration mode is implemented.
939 * Mode2 uses a byte at 0xCF8 and another at 0xCFA; Mode1 uses
940 * a DWORD at 0xCF8 and another at 0xCFC and will pass through
941 * any non-DWORD accesses as normal I/O cycles. There shouldn't be
942 * a device behind these addresses so if Mode1 accesses fail try
943 * for Mode2 (Mode2 is deprecated).
947 * Bits [30:24] of PciADDR must be 0,
948 * according to the spec.
951 if(!(n & 0x7F000000)){
952 outl(PciADDR, 0x80000000);
954 if(inl(PciADDR) & 0x80000000){
963 * The 'key' part of PciCSE should be 0.
968 if(inb(PciCSE) == 0x0E){
977 if(pcicfgmode < 0 || pcibios) {
978 if((pcibiossi = pcibiosinit()) == nil)
980 pcicfgrw8 = pcicfgrw8bios;
981 pcicfgrw16 = pcicfgrw16bios;
982 pcicfgrw32 = pcicfgrw32bios;
986 fmtinstall('T', tbdffmt);
988 if(p = getconf("*pcimaxbno"))
989 pcimaxbno = strtoul(p, 0, 0) & 0xff;
990 if(p = getconf("*pcimaxdno")){
991 n = strtoul(p, 0, 0);
997 for(bno = 0; bno <= pcimaxbno; bno++) {
999 bno = pcilscan(bno, list);
1002 list = &(*list)->link;
1008 * If we have found a PCI-to-Cardbus bridge, make sure
1009 * it has no valid mappings anymore.
1011 for(pci = pciroot; pci != nil; pci = pci->link){
1012 if (pci->ccrb == 6 && pci->ccru == 7) {
1015 /* reset the cardbus */
1016 bcr = pcicfgr16(pci, PciBCR);
1017 pcicfgw16(pci, PciBCR, 0x40 | bcr);
1029 * Work out how big the top bus is
1031 pcibussize(pciroot, &mema, &ioa);
1034 * Align the windows and map it
1039 pcilog("Mask sizes: mem=%lux io=%lux\n", mema, ioa);
1041 pcibusmap(pciroot, &mema, &ioa, 1);
1042 DBG("Sizes2: mem=%lux io=%lux\n", mema, ioa);
1044 unlock(&pcicfginitlock);
1053 unlock(&pcicfginitlock);
1055 if(getconf("*pcihinv"))
1066 * mark all the physical address space claimed by pci devices
1067 * as in use, so that upaalloc doesn't give it out.
1069 for(p=pciroot; p; p=p->list)
1070 for(i=0; i<nelem(p->mem); i++)
1071 if(p->mem[i].bar && (p->mem[i].bar&1) == 0)
1072 upareserve(p->mem[i].bar&~0x0F, p->mem[i].size);
1076 pcicfgrw8raw(int tbdf, int rno, int data, int read)
1080 if(pcicfgmode == -1)
1088 if(BUSDNO(tbdf) > pcimaxdno)
1097 outl(PciADDR, 0x80000000|BUSBDF(tbdf)|rno|type);
1101 outb(PciDATA+o, data);
1106 outb(PciCSE, 0x80|(BUSFNO(tbdf)<<1));
1107 outb(PciFORWARD, BUSBNO(tbdf));
1109 x = inb((0xC000|(BUSDNO(tbdf)<<8)) + rno);
1111 outb((0xC000|(BUSDNO(tbdf)<<8)) + rno, data);
1115 unlock(&pcicfglock);
1121 pcicfgr8(Pcidev* pcidev, int rno)
1123 return pcicfgrw8(pcidev->tbdf, rno, 0, 1);
1127 pcicfgw8(Pcidev* pcidev, int rno, int data)
1129 pcicfgrw8(pcidev->tbdf, rno, data, 0);
1133 pcicfgrw16raw(int tbdf, int rno, int data, int read)
1137 if(pcicfgmode == -1)
1145 if(BUSDNO(tbdf) > pcimaxdno)
1154 outl(PciADDR, 0x80000000|BUSBDF(tbdf)|rno|type);
1158 outs(PciDATA+o, data);
1163 outb(PciCSE, 0x80|(BUSFNO(tbdf)<<1));
1164 outb(PciFORWARD, BUSBNO(tbdf));
1166 x = ins((0xC000|(BUSDNO(tbdf)<<8)) + rno);
1168 outs((0xC000|(BUSDNO(tbdf)<<8)) + rno, data);
1172 unlock(&pcicfglock);
1178 pcicfgr16(Pcidev* pcidev, int rno)
1180 return pcicfgrw16(pcidev->tbdf, rno, 0, 1);
1184 pcicfgw16(Pcidev* pcidev, int rno, int data)
1186 pcicfgrw16(pcidev->tbdf, rno, data, 0);
1190 pcicfgrw32raw(int tbdf, int rno, int data, int read)
1194 if(pcicfgmode == -1)
1202 if(BUSDNO(tbdf) > pcimaxdno)
1210 outl(PciADDR, 0x80000000|BUSBDF(tbdf)|rno|type);
1214 outl(PciDATA, data);
1219 outb(PciCSE, 0x80|(BUSFNO(tbdf)<<1));
1220 outb(PciFORWARD, BUSBNO(tbdf));
1222 x = inl((0xC000|(BUSDNO(tbdf)<<8)) + rno);
1224 outl((0xC000|(BUSDNO(tbdf)<<8)) + rno, data);
1228 unlock(&pcicfglock);
1234 pcicfgr32(Pcidev* pcidev, int rno)
1236 return pcicfgrw32(pcidev->tbdf, rno, 0, 1);
1240 pcicfgw32(Pcidev* pcidev, int rno, int data)
1242 pcicfgrw32(pcidev->tbdf, rno, data, 0);
1246 pcimatch(Pcidev* prev, int vid, int did)
1248 if(pcicfgmode == -1)
1257 if((vid == 0 || prev->vid == vid)
1258 && (did == 0 || prev->did == did))
1266 pcimatchtbdf(int tbdf)
1270 if(pcicfgmode == -1)
1273 for(pcidev = pcilist; pcidev != nil; pcidev = pcidev->list) {
1274 if(pcidev->tbdf == tbdf)
1281 pciipin(Pcidev *pci, uchar pin)
1289 if (pcicfgr8(pci, PciINTP) == pin && pci->intl != 0 && pci->intl != 0xff)
1292 if (pci->bridge && (intl = pciipin(pci->bridge, pin)) != 0)
1307 putstrn(PCICONS.output, PCICONS.ptr);
1309 print("bus dev type vid did intl memory\n");
1311 for(t = p; t != nil; t = t->link) {
1312 print("%d %2d/%d %.2ux %.2ux %.2ux %.4ux %.4ux %3d ",
1313 BUSBNO(t->tbdf), BUSDNO(t->tbdf), BUSFNO(t->tbdf),
1314 t->ccrb, t->ccru, t->ccrp, t->vid, t->did, t->intl);
1316 for(i = 0; i < nelem(p->mem); i++) {
1317 if(t->mem[i].size == 0)
1319 print("%d:%.8lux %d ", i,
1320 t->mem[i].bar, t->mem[i].size);
1322 if(t->ioa.bar || t->ioa.size)
1323 print("ioa:%.8lux %d ", t->ioa.bar, t->ioa.size);
1324 if(t->mema.bar || t->mema.size)
1325 print("mema:%.8lux %d ", t->mema.bar, t->mema.size);
1327 print("->%d", BUSBNO(t->bridge->tbdf));
1331 if(p->bridge != nil)
1332 pcilhinv(p->bridge);
1340 if(pcicfgmode == -1)
1342 lock(&pcicfginitlock);
1344 unlock(&pcicfginitlock);
1352 if(pcicfgmode == -1)
1355 for(p = pcilist; p != nil; p = p->list) {
1356 /* don't mess with the bridges */
1364 pcisetioe(Pcidev* p)
1367 pcicfgw16(p, PciPCR, p->pcr);
1371 pciclrioe(Pcidev* p)
1374 pcicfgw16(p, PciPCR, p->pcr);
1378 pcisetbme(Pcidev* p)
1381 pcicfgw16(p, PciPCR, p->pcr);
1385 pciclrbme(Pcidev* p)
1388 pcicfgw16(p, PciPCR, p->pcr);
1392 pcisetmwi(Pcidev* p)
1395 pcicfgw16(p, PciPCR, p->pcr);
1399 pciclrmwi(Pcidev* p)
1401 p->pcr &= ~MemWrInv;
1402 pcicfgw16(p, PciPCR, p->pcr);
1406 pcigetpmrb(Pcidev* p)
1415 * If there are no extended capabilities implemented,
1416 * (bit 4 in the status register) assume there's no standard
1417 * power management method.
1418 * Find the capabilities pointer based on PCI header type.
1420 if(!(pcicfgr16(p, PciPSR) & 0x0010))
1422 switch(pcicfgr8(p, PciHDT)){
1425 case 0: /* all other */
1426 case 1: /* PCI to PCI bridge */
1429 case 2: /* CardBus bridge */
1433 ptr = pcicfgr32(p, ptr);
1437 * Check for validity.
1438 * Can't be in standard header and must be double
1441 if(ptr < 0x40 || (ptr & ~0xFC))
1443 if(pcicfgr8(p, ptr) == 0x01){
1448 ptr = pcicfgr8(p, ptr+1);
1455 pcigetpms(Pcidev* p)
1459 if((ptr = pcigetpmrb(p)) == -1)
1463 * Power Management Register Block:
1464 * offset 0: Capability ID
1465 * 1: next item pointer
1468 * 6: bridge support extensions
1471 pmcsr = pcicfgr16(p, ptr+4);
1473 return pmcsr & 0x0003;
1477 pcisetpms(Pcidev* p, int state)
1479 int ostate, pmc, pmcsr, ptr;
1481 if((ptr = pcigetpmrb(p)) == -1)
1484 pmc = pcicfgr16(p, ptr+2);
1485 pmcsr = pcicfgr16(p, ptr+4);
1486 ostate = pmcsr & 0x0003;
1506 pcicfgw16(p, ptr+4, pmcsr);
1512 pcinextcap(Pcidev *pci, int offset)
1515 if((pcicfgr16(pci, PciPSR) & (1<<4)) == 0)
1516 return 0; /* no capabilities */
1519 return pcicfgr8(pci, offset+1) & ~3;