2001/1003/pc/pci.c (diff list | history)

2001/0928/sys/src/9/pc/pci.c:507,513 – 2001/1003/sys/src/9/pc/pci.c:507,786 (short | long | prev | next)
2001/0622		return ubn; }
2001/1003		static uchar pIIx_link(Pcidev *router, uchar link) { uchar pirq; /* link should be 0x60, 0x61, 0x62, 0x63 */ pirq = pcicfgr8(router, link); return (pirq < 16)? pirq: 0; } static void pIIx_init(Pcidev *router, uchar link, uchar irq) { pcicfgw8(router, link, irq); } static uchar via_link(Pcidev *router, uchar link) { uchar pirq; /* link should be 1, 2, 3, 5 */ pirq = (link < 6)? pcicfgr8(router, 0x55 + (link>>1)): 0; return (link & 1)? (pirq >> 4): (pirq & 15); } static void via_init(Pcidev *router, uchar link, uchar irq) { uchar pirq; pirq = pcicfgr8(router, 0x55 + (link >> 1)); pirq &= (link & 1)? 0x0f: 0xf0; pirq |= (link & 1)? (irq << 4): (irq & 15); pcicfgw8(router, 0x55 + (link>>1), pirq); } static uchar opti_link(Pcidev *router, uchar link) { uchar pirq = 0; /* link should be 0x02, 0x12, 0x22, 0x32 */ if ((link & 0xcf) == 0x02) pirq = pcicfgr8(router, 0xb8 + (link >> 5)); return (link & 0x10)? (pirq >> 4): (pirq & 15); } static void opti_init(Pcidev *router, uchar link, uchar irq) { uchar pirq; pirq = pcicfgr8(router, 0xb8 + (link >> 5)); pirq &= (link & 0x10)? 0x0f : 0xf0; pirq |= (link & 0x10)? (irq << 4): (irq & 15); pcicfgw8(router, 0xb8 + (link >> 5), pirq); } static uchar ali_link(Pcidev *router, uchar link) { /* No, you're not dreaming */ static const uchar map[] = { 0, 9, 3, 10, 4, 5, 7, 6, 1, 11, 0, 12, 0, 14, 0, 15 }; uchar pirq; /* link should be 0x01..0x08 */ pirq = pcicfgr8(router, 0x48 + ((link-1)>>1)); return (link & 1)? map[pirq&15]: map[pirq>>4]; } static void ali_init(Pcidev *router, uchar link, uchar irq) { /* Inverse of map in ali_link */ static const uchar map[] = { 0, 8, 0, 2, 4, 5, 7, 6, 0, 1, 3, 9, 11, 0, 13, 15 }; uchar pirq; pirq = pcicfgr8(router, 0x48 + ((link-1)>>1)); pirq &= (link & 1)? 0x0f: 0xf0; pirq |= (link & 1)? (map[irq] << 4): (map[irq] & 15); pcicfgw8(router, 0x48 + ((link-1)>>1), pirq); } static uchar cyrix_link(Pcidev *router, uchar link) { uchar pirq; /* link should be 1, 2, 3, 4 */ pirq = pcicfgr8(router, 0x5c + ((link-1)>>1)); return ((link & 1)? pirq >> 4: pirq & 15); } static void cyrix_init(Pcidev *router, uchar link, uchar irq) { uchar pirq; pirq = pcicfgr8(router, 0x5c + (link>>1)); pirq &= (link & 1)? 0x0f: 0xf0; pirq |= (link & 1)? (irq << 4): (irq & 15); pcicfgw8(router, 0x5c + (link>>1), pirq); } enum { Intel = 0x8086, Intel_82371FB_0 = 0x122e, Intel_82371SB_0 = 0x7000, Intel_82371AB_0 = 0x7110, Intel_82443MX_1 = 0x7198, Intel_82801AA_0 = 0x2410, Intel_82801AB_0 = 0x2420, Intel_82801BA_0 = 0x2440, Intel_82801BAM_0 = 0x244c, Viatech = 0x1106, Via_82C586_0 = 0x0586, Via_82C596 = 0x0596, Via_82C686 = 0x0686, Opti = 0x1045, Opti_82C700 = 0xc700, Al = 0x10b9, Al_M1533 = 0x1533, SI = 0x1039, SI_503 = 0x0008, SI_496 = 0x0496, Cyrix = 0x1078, Cyrix_5530_Legacy = 0x0100, }; typedef struct { ushort sb_vid, sb_did; uchar (*sb_translate)(Pcidev *, uchar); void (*sb_initialize)(Pcidev *, uchar, uchar); } bridge_t; static bridge_t southbridges[] = { { Intel, Intel_82371FB_0, pIIx_link, pIIx_init }, { Intel, Intel_82371SB_0, pIIx_link, pIIx_init }, { Intel, Intel_82371AB_0, pIIx_link, pIIx_init }, { Intel, Intel_82443MX_1, pIIx_link, pIIx_init }, { Intel, Intel_82801AA_0, pIIx_link, pIIx_init }, { Intel, Intel_82801AB_0, pIIx_link, pIIx_init }, { Intel, Intel_82801BA_0, pIIx_link, pIIx_init }, { Intel, Intel_82801BAM_0, pIIx_link, pIIx_init }, { Viatech, Via_82C586_0, via_link, via_init }, { Viatech, Via_82C596, via_link, via_init }, { Viatech, Via_82C686, via_link, via_init }, { Opti, Opti_82C700, opti_link, opti_init }, { Al, Al_M1533, ali_link, ali_init }, { SI, SI_503, pIIx_link, pIIx_init }, { SI, SI_496, pIIx_link, pIIx_init }, { Cyrix, Cyrix_5530_Legacy, cyrix_link, cyrix_init } }; typedef struct { uchar e_bus; // Pci bus number uchar e_dev; // Pci device number uchar e_maps[12]; // Avoid structs! Link and mask. uchar e_slot; // Add-in/built-in slot uchar e_reserved; } slot_t; typedef struct { uchar rt_signature[4]; // Routing table signature uchar rt_version[2]; // Version number uchar rt_size[2]; // Total table size uchar rt_bus; // Interrupt router bus number uchar rt_devfn; // Router's devfunc uchar rt_pciirqs[2]; // Exclusive PCI irqs uchar rt_compat[4]; // Compatible PCI interrupt router uchar rt_miniport[4]; // Miniport data uchar rt_reserved[11]; uchar rt_checksum; } router_t; static ushort pciirqs; // Exclusive PCI irqs static bridge_t *southbridge; // Which southbridge to use.
1997/0327		static void
2001/1003		pcirouting(void) { uchar *p, pin, irq; ulong tbdf, vdid; ushort vid, did; router_t *r; slot_t *e; int size, i, fn; Pcidev *sbpci, *pci; // Peek in the BIOS for (p = (uchar *)KADDR(0xf0000); p < (uchar *)KADDR(0xfffff); p += 16) if (p[0] == '$' && p[1] == 'P' && p[2] == 'I' && p[3] == 'R') break; if (p >= (uchar *)KADDR(0xfffff)) return; r = (router_t *)p; // print("PCI interrupt routing table version %d.%d at %.6uX\n", // r->rt_version[0], r->rt_version[1], (ulong)r & 0xfffff); tbdf = (BusPCI << 24)|(r->rt_bus << 16)|(r->rt_devfn << 8); vdid = pcicfgrw32(tbdf, PciVID, 0, 1); vid = vdid; did = vdid >> 16; for (i = 0; i != nelem(southbridges); i++) if (vid == southbridges[i].sb_vid && did == southbridges[i].sb_did) break; if (i == nelem(southbridges)) { print("pcirouting: South bridge %.4uX, %.4uX not found\n", vid, did); return; } southbridge = &southbridges[i]; if ((sbpci = pcimatch(nil, vid, did)) == nil) { print("pcirouting: Cannot match south bridge %.4uX, %.4uX\n", vid, did); return; } pciirqs = (r->rt_pciirqs[1] << 8)|r->rt_pciirqs[0]; size = (r->rt_size[1] << 8)|r->rt_size[0]; for (e = (slot_t *)&r[1]; (uchar *)e < p + size; e++) { // print("%.2uX/%.2uX %.2uX: ", e->e_bus, e->e_dev, e->e_slot); // for (i = 0; i != 4; i++) { // uchar *m = &e->e_maps[i * 3]; // print("[%d] %.2uX %.4uX ", // i, m[0], (m[2] << 8)|m[1]); // } // print("\n"); for (fn = 0; fn != 8; fn++) { uchar *m; // Retrieve the did and vid through the devfn before // obtaining the Pcidev structure. tbdf = (BusPCI << 24)|(e->e_bus << 16)|((e->e_dev | fn) << 8); vdid = pcicfgrw32(tbdf, PciVID, 0, 1); if (vdid == 0xFFFFFFFF || vdid == 0) continue; vid = vdid; did = vdid >> 16; pci = nil; while ((pci = pcimatch(pci, vid, did)) != nil) { if (pci->intl != 0 && pci->intl != 0xFF) continue; pin = pcicfgr8(pci, PciINTP); if (pin == 0 || pin == 0xff) continue; m = &e->e_maps[(pin - 1) * 3]; irq = southbridge->sb_translate(sbpci, m[0]); if (irq) { print("pcirouting: %.4uX/%.4uX at pin %d irq %d\n", vid, did, pin, irq); pcicfgw8(pci, PciINTL, irq); pci->intl = irq; } } } } } static void
1997/0327		pcicfginit(void)
1995/0517		{
1998/0312		char *p;
2001/0928/sys/src/9/pc/pci.c:610,615 – 2001/1003/sys/src/9/pc/pci.c:883,891
2001/0622		qunlock(&pcicfginitlock);
1999/0301		return;
1997/0327		}
2001/1003		pcirouting();
1999/0301		out:
2001/0622		qunlock(&pcicfginitlock);
1997/0327		}