Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1040 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c
new file mode 100644
index 000000000000..58310aacea28
--- /dev/null
+++ b/arch/sparc64/kernel/pci_common.c
@@ -0,0 +1,1040 @@
+/* $Id: pci_common.c,v 1.29 2002/02/01 00:56:03 davem Exp $
+ * pci_common.c: PCI controller common support.
+ *
+ * Copyright (C) 1999 David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+
+#include <asm/pbm.h>
+
+/* Fix self device of BUS and hook it into BUS->self.
+ * The pci_scan_bus does not do this for the host bridge.
+ */
+void __init pci_fixup_host_bridge_self(struct pci_bus *pbus)
+{
+	struct pci_dev *pdev;
+
+	list_for_each_entry(pdev, &pbus->devices, bus_list) {
+		if (pdev->class >> 8 == PCI_CLASS_BRIDGE_HOST) {
+			pbus->self = pdev;
+			return;
+		}
+	}
+
+	prom_printf("PCI: Critical error, cannot find host bridge PDEV.\n");
+	prom_halt();
+}
+
+/* Find the OBP PROM device tree node for a PCI device.
+ * Return zero if not found.
+ */
+static int __init find_device_prom_node(struct pci_pbm_info *pbm,
+					struct pci_dev *pdev,
+					int bus_prom_node,
+					struct linux_prom_pci_registers *pregs,
+					int *nregs)
+{
+	int node;
+
+	/*
+	 * Return the PBM's PROM node in case we are it's PCI device,
+	 * as the PBM's reg property is different to standard PCI reg
+	 * properties. We would delete this device entry otherwise,
+	 * which confuses XFree86's device probing...
+	 */
+	if ((pdev->bus->number == pbm->pci_bus->number) && (pdev->devfn == 0) &&
+	    (pdev->vendor == PCI_VENDOR_ID_SUN) &&
+	    (pdev->device == PCI_DEVICE_ID_SUN_PBM ||
+	     pdev->device == PCI_DEVICE_ID_SUN_SCHIZO ||
+	     pdev->device == PCI_DEVICE_ID_SUN_TOMATILLO ||
+	     pdev->device == PCI_DEVICE_ID_SUN_SABRE ||
+	     pdev->device == PCI_DEVICE_ID_SUN_HUMMINGBIRD)) {
+		*nregs = 0;
+		return bus_prom_node;
+	}
+
+	node = prom_getchild(bus_prom_node);
+	while (node != 0) {
+		int err = prom_getproperty(node, "reg",
+					   (char *)pregs,
+					   sizeof(*pregs) * PROMREG_MAX);
+		if (err == 0 || err == -1)
+			goto do_next_sibling;
+		if (((pregs[0].phys_hi >> 8) & 0xff) == pdev->devfn) {
+			*nregs = err / sizeof(*pregs);
+			return node;
+		}
+
+	do_next_sibling:
+		node = prom_getsibling(node);
+	}
+	return 0;
+}
+
+/* Older versions of OBP on PCI systems encode 64-bit MEM
+ * space assignments incorrectly, this fixes them up.  We also
+ * take the opportunity here to hide other kinds of bogus
+ * assignments.
+ */
+static void __init fixup_obp_assignments(struct pci_dev *pdev,
+					 struct pcidev_cookie *pcp)
+{
+	int i;
+
+	if (pdev->vendor == PCI_VENDOR_ID_AL &&
+	    (pdev->device == PCI_DEVICE_ID_AL_M7101 ||
+	     pdev->device == PCI_DEVICE_ID_AL_M1533)) {
+		int i;
+
+		/* Zap all of the normal resources, they are
+		 * meaningless and generate bogus resource collision
+		 * messages.  This is OpenBoot's ill-fated attempt to
+		 * represent the implicit resources that these devices
+		 * have.
+		 */
+		pcp->num_prom_assignments = 0;
+		for (i = 0; i < 6; i++) {
+			pdev->resource[i].start =
+				pdev->resource[i].end =
+				pdev->resource[i].flags = 0;
+		}
+		pdev->resource[PCI_ROM_RESOURCE].start =
+			pdev->resource[PCI_ROM_RESOURCE].end =
+			pdev->resource[PCI_ROM_RESOURCE].flags = 0;
+		return;
+	}
+
+	for (i = 0; i < pcp->num_prom_assignments; i++) {
+		struct linux_prom_pci_registers *ap;
+		int space;
+
+		ap = &pcp->prom_assignments[i];
+		space = ap->phys_hi >> 24;
+		if ((space & 0x3) == 2 &&
+		    (space & 0x4) != 0) {
+			ap->phys_hi &= ~(0x7 << 24);
+			ap->phys_hi |= 0x3 << 24;
+		}
+	}
+}
+
+/* Fill in the PCI device cookie sysdata for the given
+ * PCI device.  This cookie is the means by which one
+ * can get to OBP and PCI controller specific information
+ * for a PCI device.
+ */
+static void __init pdev_cookie_fillin(struct pci_pbm_info *pbm,
+				      struct pci_dev *pdev,
+				      int bus_prom_node)
+{
+	struct linux_prom_pci_registers pregs[PROMREG_MAX];
+	struct pcidev_cookie *pcp;
+	int device_prom_node, nregs, err;
+
+	device_prom_node = find_device_prom_node(pbm, pdev, bus_prom_node,
+						 pregs, &nregs);
+	if (device_prom_node == 0) {
+		/* If it is not in the OBP device tree then
+		 * there must be a damn good reason for it.
+		 *
+		 * So what we do is delete the device from the
+		 * PCI device tree completely.  This scenario
+		 * is seen, for example, on CP1500 for the
+		 * second EBUS/HappyMeal pair if the external
+		 * connector for it is not present.
+		 */
+		pci_remove_bus_device(pdev);
+		return;
+	}
+
+	pcp = kmalloc(sizeof(*pcp), GFP_ATOMIC);
+	if (pcp == NULL) {
+		prom_printf("PCI_COOKIE: Fatal malloc error, aborting...\n");
+		prom_halt();
+	}
+	pcp->pbm = pbm;
+	pcp->prom_node = device_prom_node;
+	memcpy(pcp->prom_regs, pregs, sizeof(pcp->prom_regs));
+	pcp->num_prom_regs = nregs;
+	err = prom_getproperty(device_prom_node, "name",
+			       pcp->prom_name, sizeof(pcp->prom_name));
+	if (err > 0)
+		pcp->prom_name[err] = 0;
+	else
+		pcp->prom_name[0] = 0;
+
+	err = prom_getproperty(device_prom_node,
+			       "assigned-addresses",
+			       (char *)pcp->prom_assignments,
+			       sizeof(pcp->prom_assignments));
+	if (err == 0 || err == -1)
+		pcp->num_prom_assignments = 0;
+	else
+		pcp->num_prom_assignments =
+			(err / sizeof(pcp->prom_assignments[0]));
+
+	if (strcmp(pcp->prom_name, "ebus") == 0) {
+		struct linux_prom_ebus_ranges erng[PROM_PCIRNG_MAX];
+		int iter;
+
+		/* EBUS is special... */
+		err = prom_getproperty(device_prom_node, "ranges",
+				       (char *)&erng[0], sizeof(erng));
+		if (err == 0 || err == -1) {
+			prom_printf("EBUS: Fatal error, no range property\n");
+			prom_halt();
+		}
+		err = (err / sizeof(erng[0]));
+		for(iter = 0; iter < err; iter++) {
+			struct linux_prom_ebus_ranges *ep = &erng[iter];
+			struct linux_prom_pci_registers *ap;
+
+			ap = &pcp->prom_assignments[iter];
+
+			ap->phys_hi = ep->parent_phys_hi;
+			ap->phys_mid = ep->parent_phys_mid;
+			ap->phys_lo = ep->parent_phys_lo;
+			ap->size_hi = 0;
+			ap->size_lo = ep->size;
+		}
+		pcp->num_prom_assignments = err;
+	}
+
+	fixup_obp_assignments(pdev, pcp);
+
+	pdev->sysdata = pcp;
+}
+
+void __init pci_fill_in_pbm_cookies(struct pci_bus *pbus,
+				    struct pci_pbm_info *pbm,
+				    int prom_node)
+{
+	struct pci_dev *pdev, *pdev_next;
+	struct pci_bus *this_pbus, *pbus_next;
+
+	/* This must be _safe because the cookie fillin
+	   routine can delete devices from the tree.  */
+	list_for_each_entry_safe(pdev, pdev_next, &pbus->devices, bus_list)
+		pdev_cookie_fillin(pbm, pdev, prom_node);
+
+	list_for_each_entry_safe(this_pbus, pbus_next, &pbus->children, node) {
+		struct pcidev_cookie *pcp = this_pbus->self->sysdata;
+
+		pci_fill_in_pbm_cookies(this_pbus, pbm, pcp->prom_node);
+	}
+}
+
+static void __init bad_assignment(struct pci_dev *pdev,
+				  struct linux_prom_pci_registers *ap,
+				  struct resource *res,
+				  int do_prom_halt)
+{
+	prom_printf("PCI: Bogus PROM assignment. BUS[%02x] DEVFN[%x]\n",
+		    pdev->bus->number, pdev->devfn);
+	if (ap)
+		prom_printf("PCI: phys[%08x:%08x:%08x] size[%08x:%08x]\n",
+			    ap->phys_hi, ap->phys_mid, ap->phys_lo,
+			    ap->size_hi, ap->size_lo);
+	if (res)
+		prom_printf("PCI: RES[%016lx-->%016lx:(%lx)]\n",
+			    res->start, res->end, res->flags);
+	prom_printf("Please email this information to davem@redhat.com\n");
+	if (do_prom_halt)
+		prom_halt();
+}
+
+static struct resource *
+__init get_root_resource(struct linux_prom_pci_registers *ap,
+			 struct pci_pbm_info *pbm)
+{
+	int space = (ap->phys_hi >> 24) & 3;
+
+	switch (space) {
+	case 0:
+		/* Configuration space, silently ignore it. */
+		return NULL;
+
+	case 1:
+		/* 16-bit IO space */
+		return &pbm->io_space;
+
+	case 2:
+		/* 32-bit MEM space */
+		return &pbm->mem_space;
+
+	case 3:
+		/* 64-bit MEM space, these are allocated out of
+		 * the 32-bit mem_space range for the PBM, ie.
+		 * we just zero out the upper 32-bits.
+		 */
+		return &pbm->mem_space;
+
+	default:
+		printk("PCI: What is resource space %x? "
+		       "Tell davem@redhat.com about it!\n", space);
+		return NULL;
+	};
+}
+
+static struct resource *
+__init get_device_resource(struct linux_prom_pci_registers *ap,
+			   struct pci_dev *pdev)
+{
+	struct resource *res;
+	int breg = (ap->phys_hi & 0xff);
+
+	switch (breg) {
+	case  PCI_ROM_ADDRESS:
+		/* Unfortunately I have seen several cases where
+		 * buggy FCODE uses a space value of '1' (I/O space)
+		 * in the register property for the ROM address
+		 * so disable this sanity check for now.
+		 */
+#if 0
+	{
+		int space = (ap->phys_hi >> 24) & 3;
+
+		/* It had better be MEM space. */
+		if (space != 2)
+			bad_assignment(pdev, ap, NULL, 0);
+	}
+#endif
+		res = &pdev->resource[PCI_ROM_RESOURCE];
+		break;
+
+	case PCI_BASE_ADDRESS_0:
+	case PCI_BASE_ADDRESS_1:
+	case PCI_BASE_ADDRESS_2:
+	case PCI_BASE_ADDRESS_3:
+	case PCI_BASE_ADDRESS_4:
+	case PCI_BASE_ADDRESS_5:
+		res = &pdev->resource[(breg - PCI_BASE_ADDRESS_0) / 4];
+		break;
+
+	default:
+		bad_assignment(pdev, ap, NULL, 0);
+		res = NULL;
+		break;
+	};
+
+	return res;
+}
+
+static int __init pdev_resource_collisions_expected(struct pci_dev *pdev)
+{
+	if (pdev->vendor != PCI_VENDOR_ID_SUN)
+		return 0;
+
+	if (pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS ||
+	    pdev->device == PCI_DEVICE_ID_SUN_RIO_1394 ||
+	    pdev->device == PCI_DEVICE_ID_SUN_RIO_USB)
+		return 1;
+
+	return 0;
+}
+
+static void __init pdev_record_assignments(struct pci_pbm_info *pbm,
+					   struct pci_dev *pdev)
+{
+	struct pcidev_cookie *pcp = pdev->sysdata;
+	int i;
+
+	for (i = 0; i < pcp->num_prom_assignments; i++) {
+		struct linux_prom_pci_registers *ap;
+		struct resource *root, *res;
+
+		/* The format of this property is specified in
+		 * the PCI Bus Binding to IEEE1275-1994.
+		 */
+		ap = &pcp->prom_assignments[i];
+		root = get_root_resource(ap, pbm);
+		res = get_device_resource(ap, pdev);
+		if (root == NULL || res == NULL ||
+		    res->flags == 0)
+			continue;
+
+		/* Ok we know which resource this PROM assignment is
+		 * for, sanity check it.
+		 */
+		if ((res->start & 0xffffffffUL) != ap->phys_lo)
+			bad_assignment(pdev, ap, res, 1);
+
+		/* If it is a 64-bit MEM space assignment, verify that
+		 * the resource is too and that the upper 32-bits match.
+		 */
+		if (((ap->phys_hi >> 24) & 3) == 3) {
+			if (((res->flags & IORESOURCE_MEM) == 0) ||
+			    ((res->flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
+			     != PCI_BASE_ADDRESS_MEM_TYPE_64))
+				bad_assignment(pdev, ap, res, 1);
+			if ((res->start >> 32) != ap->phys_mid)
+				bad_assignment(pdev, ap, res, 1);
+
+			/* PBM cannot generate cpu initiated PIOs
+			 * to the full 64-bit space.  Therefore the
+			 * upper 32-bits better be zero.  If it is
+			 * not, just skip it and we will assign it
+			 * properly ourselves.
+			 */
+			if ((res->start >> 32) != 0UL) {
+				printk(KERN_ERR "PCI: OBP assigns out of range MEM address "
+				       "%016lx for region %ld on device %s\n",
+				       res->start, (res - &pdev->resource[0]), pci_name(pdev));
+				continue;
+			}
+		}
+
+		/* Adjust the resource into the physical address space
+		 * of this PBM.
+		 */
+		pbm->parent->resource_adjust(pdev, res, root);
+
+		if (request_resource(root, res) < 0) {
+			/* OK, there is some conflict.  But this is fine
+			 * since we'll reassign it in the fixup pass.
+			 *
+			 * We notify the user that OBP made an error if it
+			 * is a case we don't expect.
+			 */
+			if (!pdev_resource_collisions_expected(pdev)) {
+				printk(KERN_ERR "PCI: Address space collision on region %ld "
+				       "[%016lx:%016lx] of device %s\n",
+				       (res - &pdev->resource[0]),
+				       res->start, res->end,
+				       pci_name(pdev));
+			}
+		}
+	}
+}
+
+void __init pci_record_assignments(struct pci_pbm_info *pbm,
+				   struct pci_bus *pbus)
+{
+	struct pci_dev *dev;
+	struct pci_bus *bus;
+
+	list_for_each_entry(dev, &pbus->devices, bus_list)
+		pdev_record_assignments(pbm, dev);
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_record_assignments(pbm, bus);
+}
+
+/* Return non-zero if PDEV has implicit I/O resources even
+ * though it may not have an I/O base address register
+ * active.
+ */
+static int __init has_implicit_io(struct pci_dev *pdev)
+{
+	int class = pdev->class >> 8;
+
+	if (class == PCI_CLASS_NOT_DEFINED ||
+	    class == PCI_CLASS_NOT_DEFINED_VGA ||
+	    class == PCI_CLASS_STORAGE_IDE ||
+	    (pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY)
+		return 1;
+
+	return 0;
+}
+
+static void __init pdev_assign_unassigned(struct pci_pbm_info *pbm,
+					  struct pci_dev *pdev)
+{
+	u32 reg;
+	u16 cmd;
+	int i, io_seen, mem_seen;
+
+	io_seen = mem_seen = 0;
+	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+		struct resource *root, *res;
+		unsigned long size, min, max, align;
+
+		res = &pdev->resource[i];
+
+		if (res->flags & IORESOURCE_IO)
+			io_seen++;
+		else if (res->flags & IORESOURCE_MEM)
+			mem_seen++;
+
+		/* If it is already assigned or the resource does
+		 * not exist, there is nothing to do.
+		 */
+		if (res->parent != NULL || res->flags == 0UL)
+			continue;
+
+		/* Determine the root we allocate from. */
+		if (res->flags & IORESOURCE_IO) {
+			root = &pbm->io_space;
+			min = root->start + 0x400UL;
+			max = root->end;
+		} else {
+			root = &pbm->mem_space;
+			min = root->start;
+			max = min + 0x80000000UL;
+		}
+
+		size = res->end - res->start;
+		align = size + 1;
+		if (allocate_resource(root, res, size + 1, min, max, align, NULL, NULL) < 0) {
+			/* uh oh */
+			prom_printf("PCI: Failed to allocate resource %d for %s\n",
+				    i, pci_name(pdev));
+			prom_halt();
+		}
+
+		/* Update PCI config space. */
+		pbm->parent->base_address_update(pdev, i);
+	}
+
+	/* Special case, disable the ROM.  Several devices
+	 * act funny (ie. do not respond to memory space writes)
+	 * when it is left enabled.  A good example are Qlogic,ISP
+	 * adapters.
+	 */
+	pci_read_config_dword(pdev, PCI_ROM_ADDRESS, &reg);
+	reg &= ~PCI_ROM_ADDRESS_ENABLE;
+	pci_write_config_dword(pdev, PCI_ROM_ADDRESS, reg);
+
+	/* If we saw I/O or MEM resources, enable appropriate
+	 * bits in PCI command register.
+	 */
+	if (io_seen || mem_seen) {
+		pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+		if (io_seen || has_implicit_io(pdev))
+			cmd |= PCI_COMMAND_IO;
+		if (mem_seen)
+			cmd |= PCI_COMMAND_MEMORY;
+		pci_write_config_word(pdev, PCI_COMMAND, cmd);
+	}
+
+	/* If this is a PCI bridge or an IDE controller,
+	 * enable bus mastering.  In the former case also
+	 * set the cache line size correctly.
+	 */
+	if (((pdev->class >> 8) == PCI_CLASS_BRIDGE_PCI) ||
+	    (((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) &&
+	     ((pdev->class & 0x80) != 0))) {
+		pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+		cmd |= PCI_COMMAND_MASTER;
+		pci_write_config_word(pdev, PCI_COMMAND, cmd);
+
+		if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_PCI)
+			pci_write_config_byte(pdev,
+					      PCI_CACHE_LINE_SIZE,
+					      (64 / sizeof(u32)));
+	}
+}
+
+void __init pci_assign_unassigned(struct pci_pbm_info *pbm,
+				  struct pci_bus *pbus)
+{
+	struct pci_dev *dev;
+	struct pci_bus *bus;
+
+	list_for_each_entry(dev, &pbus->devices, bus_list)
+		pdev_assign_unassigned(pbm, dev);
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_assign_unassigned(pbm, bus);
+}
+
+static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt)
+{
+	struct linux_prom_pci_intmap bridge_local_intmap[PROM_PCIIMAP_MAX], *intmap;
+	struct linux_prom_pci_intmask bridge_local_intmask, *intmask;
+	struct pcidev_cookie *dev_pcp = pdev->sysdata;
+	struct pci_pbm_info *pbm = dev_pcp->pbm;
+	struct linux_prom_pci_registers *pregs = dev_pcp->prom_regs;
+	unsigned int hi, mid, lo, irq;
+	int i, num_intmap, map_slot;
+
+	intmap = &pbm->pbm_intmap[0];
+	intmask = &pbm->pbm_intmask;
+	num_intmap = pbm->num_pbm_intmap;
+	map_slot = 0;
+
+	/* If we are underneath a PCI bridge, use PROM register
+	 * property of the parent bridge which is closest to
+	 * the PBM.
+	 *
+	 * However if that parent bridge has interrupt map/mask
+	 * properties of its own we use the PROM register property
+	 * of the next child device on the path to PDEV.
+	 *
+	 * In detail the two cases are (note that the 'X' below is the
+	 * 'next child on the path to PDEV' mentioned above):
+	 *
+	 * 1) PBM --> PCI bus lacking int{map,mask} --> X ... PDEV
+	 *
+	 *    Here we use regs of 'PCI bus' device.
+	 *
+	 * 2) PBM --> PCI bus with int{map,mask} --> X ... PDEV
+	 *
+	 *    Here we use regs of 'X'.  Note that X can be PDEV.
+	 */
+	if (pdev->bus->number != pbm->pci_first_busno) {
+		struct pcidev_cookie *bus_pcp, *regs_pcp;
+		struct pci_dev *bus_dev, *regs_dev;
+		int plen;
+
+		bus_dev = pdev->bus->self;
+		regs_dev = pdev;
+
+		while (bus_dev->bus &&
+		       bus_dev->bus->number != pbm->pci_first_busno) {
+			regs_dev = bus_dev;
+			bus_dev = bus_dev->bus->self;
+		}
+
+		regs_pcp = regs_dev->sysdata;
+		pregs = regs_pcp->prom_regs;
+
+		bus_pcp = bus_dev->sysdata;
+
+		/* But if the PCI bridge has it's own interrupt map
+		 * and mask properties, use that and the regs of the
+		 * PCI entity at the next level down on the path to the
+		 * device.
+		 */
+		plen = prom_getproperty(bus_pcp->prom_node, "interrupt-map",
+					(char *) &bridge_local_intmap[0],
+					sizeof(bridge_local_intmap));
+		if (plen != -1) {
+			intmap = &bridge_local_intmap[0];
+			num_intmap = plen / sizeof(struct linux_prom_pci_intmap);
+			plen = prom_getproperty(bus_pcp->prom_node,
+						"interrupt-map-mask",
+						(char *) &bridge_local_intmask,
+						sizeof(bridge_local_intmask));
+			if (plen == -1) {
+				printk("pci_intmap_match: Warning! Bridge has intmap "
+				       "but no intmask.\n");
+				printk("pci_intmap_match: Trying to recover.\n");
+				return 0;
+			}
+
+			if (pdev->bus->self != bus_dev)
+				map_slot = 1;
+		} else {
+			pregs = bus_pcp->prom_regs;
+			map_slot = 1;
+		}
+	}
+
+	if (map_slot) {
+		*interrupt = ((*interrupt
+			       - 1
+			       + PCI_SLOT(pdev->devfn)) & 0x3) + 1;
+	}
+
+	hi   = pregs->phys_hi & intmask->phys_hi;
+	mid  = pregs->phys_mid & intmask->phys_mid;
+	lo   = pregs->phys_lo & intmask->phys_lo;
+	irq  = *interrupt & intmask->interrupt;
+
+	for (i = 0; i < num_intmap; i++) {
+		if (intmap[i].phys_hi  == hi	&&
+		    intmap[i].phys_mid == mid	&&
+		    intmap[i].phys_lo  == lo	&&
+		    intmap[i].interrupt == irq) {
+			*interrupt = intmap[i].cinterrupt;
+			printk("PCI-IRQ: Routing bus[%2x] slot[%2x] map[%d] to INO[%02x]\n",
+			       pdev->bus->number, PCI_SLOT(pdev->devfn),
+			       map_slot, *interrupt);
+			return 1;
+		}
+	}
+
+	/* We will run this code even if pbm->num_pbm_intmap is zero, just so
+	 * we can apply the slot mapping to the PROM interrupt property value.
+	 * So do not spit out these warnings in that case.
+	 */
+	if (num_intmap != 0) {
+		/* Print it both to OBP console and kernel one so that if bootup
+		 * hangs here the user has the information to report.
+		 */
+		prom_printf("pci_intmap_match: bus %02x, devfn %02x: ",
+			    pdev->bus->number, pdev->devfn);
+		prom_printf("IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map\n",
+			    pregs->phys_hi, pregs->phys_mid, pregs->phys_lo, *interrupt);
+		prom_printf("Please email this information to davem@redhat.com\n");
+
+		printk("pci_intmap_match: bus %02x, devfn %02x: ",
+		       pdev->bus->number, pdev->devfn);
+		printk("IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map\n",
+		       pregs->phys_hi, pregs->phys_mid, pregs->phys_lo, *interrupt);
+		printk("Please email this information to davem@redhat.com\n");
+	}
+
+	return 0;
+}
+
+static void __init pdev_fixup_irq(struct pci_dev *pdev)
+{
+	struct pcidev_cookie *pcp = pdev->sysdata;
+	struct pci_pbm_info *pbm = pcp->pbm;
+	struct pci_controller_info *p = pbm->parent;
+	unsigned int portid = pbm->portid;
+	unsigned int prom_irq;
+	int prom_node = pcp->prom_node;
+	int err;
+
+	/* If this is an empty EBUS device, sometimes OBP fails to
+	 * give it a valid fully specified interrupts property.
+	 * The EBUS hooked up to SunHME on PCI I/O boards of
+	 * Ex000 systems is one such case.
+	 *
+	 * The interrupt is not important so just ignore it.
+	 */
+	if (pdev->vendor == PCI_VENDOR_ID_SUN &&
+	    pdev->device == PCI_DEVICE_ID_SUN_EBUS &&
+	    !prom_getchild(prom_node)) {
+		pdev->irq = 0;
+		return;
+	}
+
+	err = prom_getproperty(prom_node, "interrupts",
+			       (char *)&prom_irq, sizeof(prom_irq));
+	if (err == 0 || err == -1) {
+		pdev->irq = 0;
+		return;
+	}
+
+	/* Fully specified already? */
+	if (((prom_irq & PCI_IRQ_IGN) >> 6) == portid) {
+		pdev->irq = p->irq_build(pbm, pdev, prom_irq);
+		goto have_irq;
+	}
+
+	/* An onboard device? (bit 5 set) */
+	if ((prom_irq & PCI_IRQ_INO) & 0x20) {
+		pdev->irq = p->irq_build(pbm, pdev, (portid << 6 | prom_irq));
+		goto have_irq;
+	}
+
+	/* Can we find a matching entry in the interrupt-map? */
+	if (pci_intmap_match(pdev, &prom_irq)) {
+		pdev->irq = p->irq_build(pbm, pdev, (portid << 6) | prom_irq);
+		goto have_irq;
+	}
+
+	/* Ok, we have to do it the hard way. */
+	{
+		unsigned int bus, slot, line;
+
+		bus = (pbm == &pbm->parent->pbm_B) ? (1 << 4) : 0;
+
+		/* If we have a legal interrupt property, use it as
+		 * the IRQ line.
+		 */
+		if (prom_irq > 0 && prom_irq < 5) {
+			line = ((prom_irq - 1) & 3);
+		} else {
+			u8 pci_irq_line;
+
+			/* Else just directly consult PCI config space. */
+			pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pci_irq_line);
+			line = ((pci_irq_line - 1) & 3);
+		}
+
+		/* Now figure out the slot.
+		 *
+		 * Basically, device number zero on the top-level bus is
+		 * always the PCI host controller.  Slot 0 is then device 1.
+		 * PBM A supports two external slots (0 and 1), and PBM B
+		 * supports 4 external slots (0, 1, 2, and 3).  On-board PCI
+		 * devices are wired to device numbers outside of these
+		 * ranges. -DaveM
+ 		 */
+		if (pdev->bus->number == pbm->pci_first_busno) {
+			slot = PCI_SLOT(pdev->devfn) - pbm->pci_first_slot;
+		} else {
+			struct pci_dev *bus_dev;
+
+			/* Underneath a bridge, use slot number of parent
+			 * bridge which is closest to the PBM.
+			 */
+			bus_dev = pdev->bus->self;
+			while (bus_dev->bus &&
+			       bus_dev->bus->number != pbm->pci_first_busno)
+				bus_dev = bus_dev->bus->self;
+
+			slot = PCI_SLOT(bus_dev->devfn) - pbm->pci_first_slot;
+		}
+		slot = slot << 2;
+
+		pdev->irq = p->irq_build(pbm, pdev,
+					 ((portid << 6) & PCI_IRQ_IGN) |
+					 (bus | slot | line));
+	}
+
+have_irq:
+	pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
+			      pdev->irq & PCI_IRQ_INO);
+}
+
+void __init pci_fixup_irq(struct pci_pbm_info *pbm,
+			  struct pci_bus *pbus)
+{
+	struct pci_dev *dev;
+	struct pci_bus *bus;
+
+	list_for_each_entry(dev, &pbus->devices, bus_list)
+		pdev_fixup_irq(dev);
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_fixup_irq(pbm, bus);
+}
+
+static void pdev_setup_busmastering(struct pci_dev *pdev, int is_66mhz)
+{
+	u16 cmd;
+	u8 hdr_type, min_gnt, ltimer;
+
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	cmd |= PCI_COMMAND_MASTER;
+	pci_write_config_word(pdev, PCI_COMMAND, cmd);
+
+	/* Read it back, if the mastering bit did not
+	 * get set, the device does not support bus
+	 * mastering so we have nothing to do here.
+	 */
+	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+	if ((cmd & PCI_COMMAND_MASTER) == 0)
+		return;
+
+	/* Set correct cache line size, 64-byte on all
+	 * Sparc64 PCI systems.  Note that the value is
+	 * measured in 32-bit words.
+	 */
+	pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE,
+			      64 / sizeof(u32));
+
+	pci_read_config_byte(pdev, PCI_HEADER_TYPE, &hdr_type);
+	hdr_type &= ~0x80;
+	if (hdr_type != PCI_HEADER_TYPE_NORMAL)
+		return;
+
+	/* If the latency timer is already programmed with a non-zero
+	 * value, assume whoever set it (OBP or whoever) knows what
+	 * they are doing.
+	 */
+	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &ltimer);
+	if (ltimer != 0)
+		return;
+
+	/* XXX Since I'm tipping off the min grant value to
+	 * XXX choose a suitable latency timer value, I also
+	 * XXX considered making use of the max latency value
+	 * XXX as well.  Unfortunately I've seen too many bogusly
+	 * XXX low settings for it to the point where it lacks
+	 * XXX any usefulness.  In one case, an ethernet card
+	 * XXX claimed a min grant of 10 and a max latency of 5.
+	 * XXX Now, if I had two such cards on the same bus I
+	 * XXX could not set the desired burst period (calculated
+	 * XXX from min grant) without violating the max latency
+	 * XXX bound.  Duh...
+	 * XXX
+	 * XXX I blame dumb PC bios implementors for stuff like
+	 * XXX this, most of them don't even try to do something
+	 * XXX sensible with latency timer values and just set some
+	 * XXX default value (usually 32) into every device.
+	 */
+
+	pci_read_config_byte(pdev, PCI_MIN_GNT, &min_gnt);
+
+	if (min_gnt == 0) {
+		/* If no min_gnt setting then use a default
+		 * value.
+		 */
+		if (is_66mhz)
+			ltimer = 16;
+		else
+			ltimer = 32;
+	} else {
+		int shift_factor;
+
+		if (is_66mhz)
+			shift_factor = 2;
+		else
+			shift_factor = 3;
+
+		/* Use a default value when the min_gnt value
+		 * is erroneously high.
+		 */
+		if (((unsigned int) min_gnt << shift_factor) > 512 ||
+		    ((min_gnt << shift_factor) & 0xff) == 0) {
+			ltimer = 8 << shift_factor;
+		} else {
+			ltimer = min_gnt << shift_factor;
+		}
+	}
+
+	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ltimer);
+}
+
+void pci_determine_66mhz_disposition(struct pci_pbm_info *pbm,
+				     struct pci_bus *pbus)
+{
+	struct pci_dev *pdev;
+	int all_are_66mhz;
+	u16 status;
+
+	if (pbm->is_66mhz_capable == 0) {
+		all_are_66mhz = 0;
+		goto out;
+	}
+
+	all_are_66mhz = 1;
+	list_for_each_entry(pdev, &pbus->devices, bus_list) {
+		pci_read_config_word(pdev, PCI_STATUS, &status);
+		if (!(status & PCI_STATUS_66MHZ)) {
+			all_are_66mhz = 0;
+			break;
+		}
+	}
+out:
+	pbm->all_devs_66mhz = all_are_66mhz;
+
+	printk("PCI%d(PBM%c): Bus running at %dMHz\n",
+	       pbm->parent->index,
+	       (pbm == &pbm->parent->pbm_A) ? 'A' : 'B',
+	       (all_are_66mhz ? 66 : 33));
+}
+
+void pci_setup_busmastering(struct pci_pbm_info *pbm,
+			    struct pci_bus *pbus)
+{
+	struct pci_dev *dev;
+	struct pci_bus *bus;
+	int is_66mhz;
+
+	is_66mhz = pbm->is_66mhz_capable && pbm->all_devs_66mhz;
+
+	list_for_each_entry(dev, &pbus->devices, bus_list)
+		pdev_setup_busmastering(dev, is_66mhz);
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_setup_busmastering(pbm, bus);
+}
+
+void pci_register_legacy_regions(struct resource *io_res,
+				 struct resource *mem_res)
+{
+	struct resource *p;
+
+	/* VGA Video RAM. */
+	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return;
+
+	memset(p, 0, sizeof(*p));
+	p->name = "Video RAM area";
+	p->start = mem_res->start + 0xa0000UL;
+	p->end = p->start + 0x1ffffUL;
+	p->flags = IORESOURCE_BUSY;
+	request_resource(mem_res, p);
+
+	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return;
+
+	memset(p, 0, sizeof(*p));
+	p->name = "System ROM";
+	p->start = mem_res->start + 0xf0000UL;
+	p->end = p->start + 0xffffUL;
+	p->flags = IORESOURCE_BUSY;
+	request_resource(mem_res, p);
+
+	p = kmalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return;
+
+	memset(p, 0, sizeof(*p));
+	p->name = "Video ROM";
+	p->start = mem_res->start + 0xc0000UL;
+	p->end = p->start + 0x7fffUL;
+	p->flags = IORESOURCE_BUSY;
+	request_resource(mem_res, p);
+}
+
+/* Generic helper routines for PCI error reporting. */
+void pci_scan_for_target_abort(struct pci_controller_info *p,
+			       struct pci_pbm_info *pbm,
+			       struct pci_bus *pbus)
+{
+	struct pci_dev *pdev;
+	struct pci_bus *bus;
+
+	list_for_each_entry(pdev, &pbus->devices, bus_list) {
+		u16 status, error_bits;
+
+		pci_read_config_word(pdev, PCI_STATUS, &status);
+		error_bits =
+			(status & (PCI_STATUS_SIG_TARGET_ABORT |
+				   PCI_STATUS_REC_TARGET_ABORT));
+		if (error_bits) {
+			pci_write_config_word(pdev, PCI_STATUS, error_bits);
+			printk("PCI%d(PBM%c): Device [%s] saw Target Abort [%016x]\n",
+			       p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
+			       pci_name(pdev), status);
+		}
+	}
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_scan_for_target_abort(p, pbm, bus);
+}
+
+void pci_scan_for_master_abort(struct pci_controller_info *p,
+			       struct pci_pbm_info *pbm,
+			       struct pci_bus *pbus)
+{
+	struct pci_dev *pdev;
+	struct pci_bus *bus;
+
+	list_for_each_entry(pdev, &pbus->devices, bus_list) {
+		u16 status, error_bits;
+
+		pci_read_config_word(pdev, PCI_STATUS, &status);
+		error_bits =
+			(status & (PCI_STATUS_REC_MASTER_ABORT));
+		if (error_bits) {
+			pci_write_config_word(pdev, PCI_STATUS, error_bits);
+			printk("PCI%d(PBM%c): Device [%s] received Master Abort [%016x]\n",
+			       p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
+			       pci_name(pdev), status);
+		}
+	}
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_scan_for_master_abort(p, pbm, bus);
+}
+
+void pci_scan_for_parity_error(struct pci_controller_info *p,
+			       struct pci_pbm_info *pbm,
+			       struct pci_bus *pbus)
+{
+	struct pci_dev *pdev;
+	struct pci_bus *bus;
+
+	list_for_each_entry(pdev, &pbus->devices, bus_list) {
+		u16 status, error_bits;
+
+		pci_read_config_word(pdev, PCI_STATUS, &status);
+		error_bits =
+			(status & (PCI_STATUS_PARITY |
+				   PCI_STATUS_DETECTED_PARITY));
+		if (error_bits) {
+			pci_write_config_word(pdev, PCI_STATUS, error_bits);
+			printk("PCI%d(PBM%c): Device [%s] saw Parity Error [%016x]\n",
+			       p->index, ((pbm == &p->pbm_A) ? 'A' : 'B'),
+			       pci_name(pdev), status);
+		}
+	}
+
+	list_for_each_entry(bus, &pbus->children, node)
+		pci_scan_for_parity_error(p, pbm, bus);
+}