C++ dev_path函数代码示例

static void lpc47n227_pnp_set_resource(device_t dev, struct resource *resource)
{
	if (!(resource->flags & IORESOURCE_ASSIGNED)) {
		printk(BIOS_ERR, "ERROR: %s %02lx not allocated\n",
			   dev_path(dev), resource->index);
		return;
	}

	/* Now store the resource */
	// NOTE: Cannot use pnp_set_XXX() here because they assume chip
	// support for logical devices, which the LPC47N227 doesn't have

	if (resource->flags & IORESOURCE_IO) {
		lpc47n227_pnp_set_iobase(dev, resource->base);
	} else if (resource->flags & IORESOURCE_DRQ) {
		lpc47n227_pnp_set_drq(dev, resource->base);
	} else if (resource->flags & IORESOURCE_IRQ) {
		lpc47n227_pnp_set_irq(dev, resource->base);
	} else {
		printk(BIOS_ERR, "ERROR: %s %02lx unknown resource type\n",
			   dev_path(dev), resource->index);
		return;
	}
	resource->flags |= IORESOURCE_STORED;

	report_resource_stored(dev, resource, "");
}

void scan_smbus(device_t bus)
{
	device_t child;
	struct bus *link;
	static int smbus_max = 0;

	printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));

	for (link = bus->link_list; link; link = link->next) {

		link->secondary = ++smbus_max;

		for (child = link->children; child; child = child->sibling) {

			if (child->chip_ops && child->chip_ops->enable_dev)
				child->chip_ops->enable_dev(child);

			if (child->ops && child->ops->enable)
				child->ops->enable(child);

			printk(BIOS_DEBUG, "smbus: %s[%d]->", dev_path(child->bus->dev),
			       child->bus->link_num);

			printk(BIOS_DEBUG, "%s %s\n", dev_path(child),
			       child->enabled ? "enabled" : "disabled");
		}
	}

	printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
}

/**
 * Read the resources on all devices of a given bus.
 *
 * @param bus Bus to read the resources on.
 */
static void read_resources(struct bus *bus)
{
	struct device *curdev;

	printk(BIOS_SPEW, "%s %s bus %x link: %d\n", dev_path(bus->dev),
	       __func__, bus->secondary, bus->link_num);

	/* Walk through all devices and find which resources they need. */
	for (curdev = bus->children; curdev; curdev = curdev->sibling) {
		struct bus *link;

		if (!curdev->enabled)
			continue;

		if (!curdev->ops || !curdev->ops->read_resources) {
			printk(BIOS_ERR, "%s missing read_resources\n",
			       dev_path(curdev));
			continue;
		}
		curdev->ops->read_resources(curdev);

		/* Read in the resources behind the current device's links. */
		for (link = curdev->link_list; link; link = link->next)
			read_resources(link);
	}
	printk(BIOS_SPEW, "%s read_resources bus %d link: %d done\n",
	       dev_path(bus->dev), bus->secondary, bus->link_num);
}

static void constrain_resources(struct device *dev, struct constraints* limits)
{
	struct device *child;
	struct resource *res;
	struct resource *lim;
	struct bus *link;

	printk(BIOS_SPEW, "%s: %s\n", __func__, dev_path(dev));

	/* Constrain limits based on the fixed resources of this device. */
	for (res = dev->resource_list; res; res = res->next) {
		if (!(res->flags & IORESOURCE_FIXED))
			continue;
		if (!res->size) {
			/* It makes no sense to have 0-sized, fixed resources.*/
			printk(BIOS_ERR, "skipping %[email protected]%lx fixed resource, "
			       "size=0!\n", dev_path(dev), res->index);
			continue;
		}

		/* PREFETCH, MEM, or I/O - skip any others. */
		if ((res->flags & MEM_MASK) == PREF_TYPE)
			lim = &limits->pref;
		else if ((res->flags & MEM_MASK) == MEM_TYPE)
			lim = &limits->mem;
		else if ((res->flags & IO_MASK) == IO_TYPE)
			lim = &limits->io;
		else
			continue;

		/*
		 * Is it a fixed resource outside the current known region?
		 * If so, we don't have to consider it - it will be handled
		 * correctly and doesn't affect current region's limits.
		 */
		if (((res->base + res->size -1) < lim->base)
		    || (res->base > lim->limit))
			continue;

		/*
		 * Choose to be above or below fixed resources. This check is
		 * signed so that "negative" amounts of space are handled
		 * correctly.
		 */
		if ((signed long long)(lim->limit - (res->base + res->size -1))
		    > (signed long long)(res->base - lim->base))
			lim->base = res->base + res->size;
		else
			lim->limit = res->base -1;
	}

	/* Descend into every enabled child and look for fixed resources. */
	for (link = dev->link_list; link; link = link->next) {
		for (child = link->children; child; child = child->sibling) {
			if (child->enabled)
				constrain_resources(child, limits);
		}
	}
}

void scan_lpc_bus(device_t bus)
{
	printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));

	scan_static_bus(bus);

	printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
}

static void pcixx12_set_resources(device_t dev)
{
	printk(BIOS_DEBUG, "%s In set resources \n",dev_path(dev));

	pci_dev_set_resources(dev);

	printk(BIOS_DEBUG, "%s done set resources \n",dev_path(dev));
}

static void pci7420_cardbus_set_resources(struct device *dev)
{
	printk(BIOS_DEBUG, "%s In set resources\n",dev_path(dev));

	pci_dev_set_resources(dev);

	printk(BIOS_DEBUG, "%s done set resources\n",dev_path(dev));
}

void get_bus_conf(void)
{

	unsigned apicid_base;

	struct device *dev;
	int i;
	struct mb_sysconf_t *m;


	sysconf.mb = &mb_sysconf;

	m = sysconf.mb;
	memset(m, 0, sizeof(struct mb_sysconf_t));

	get_default_pci1234(32);

	sysconf.sbdn = (sysconf.hcdn[0] >> 8) & 0xff;
	m->sbdn2 = sysconf.hcdn[0] & 0xff; // bcm5780

	m->bus_bcm5785_0 = (sysconf.pci1234[0] >> 12) & 0xff;
	m->bus_bcm5780[0] = m->bus_bcm5785_0;

		/* bcm5785 */
	printk(BIOS_DEBUG, "search for def %d.0 on bus %d\n",sysconf.sbdn,m->bus_bcm5785_0);
	dev = dev_find_slot(m->bus_bcm5785_0, PCI_DEVFN(sysconf.sbdn,0));
	if (dev) {
		printk(BIOS_DEBUG, "found dev %s...\n",dev_path(dev));
		m->bus_bcm5785_1 = pci_read_config8(dev, PCI_SECONDARY_BUS);
		printk(BIOS_DEBUG, "secondary is %d...\n",m->bus_bcm5785_1);
		dev = dev_find_slot(m->bus_bcm5785_1, PCI_DEVFN(0xd,0));
		printk(BIOS_DEBUG, "now found %s...\n",dev_path(dev));
		if (dev)
			m->bus_bcm5785_1_1 = pci_read_config8(dev, PCI_SECONDARY_BUS);
	}
	else {
		printk(BIOS_DEBUG, "ERROR - could not find PCI %02x:%02x.0, using defaults\n", m->bus_bcm5785_0, sysconf.sbdn);
	}

		/* bcm5780 */
	for (i = 1; i < 6; i++) {
		dev = dev_find_slot(m->bus_bcm5780[0], PCI_DEVFN(m->sbdn2 + i - 1,0));
		if (dev)
			m->bus_bcm5780[i] = pci_read_config8(dev, PCI_SECONDARY_BUS);
		else
			printk(BIOS_DEBUG, "ERROR - could not find PCI %02x:%02x.0, using defaults\n", m->bus_bcm5780[0], m->sbdn2+i-1);
	}

/*I/O APICs:	APIC ID	Version	State		Address*/
	apicid_base = 0x10;
	for (i = 0; i < 3; i++)
		m->apicid_bcm5785[i] = apicid_base+i;
}

/**
 * Scan root bus for generic systems.
 *
 * This function is the default scan_bus() method of the root device.
 *
 * @param root The root device structure.
 */
static void root_dev_scan_bus(device_t bus)
{
	struct bus *link;

	printk(BIOS_SPEW, "%s for %s\n", __func__, dev_path(bus));

	scan_static_bus(bus);

	for (link = bus->link_list; link; link = link->next)
		scan_bridges(link);

	printk(BIOS_SPEW, "%s for %s done\n", __func__, dev_path(bus));
}

/*
 * The only consumer of the return value of get_pbus() is pci_bus_ops().
 * pci_bus_ops() can handle being passed NULL and auto-picks working ops.
 */
static struct bus *get_pbus(struct device *dev)
{
	struct bus *pbus = NULL;

	if (!dev)
		die("get_pbus: dev is NULL!\n");
	else
		pbus = dev->bus;

	while (pbus && pbus->dev && !pci_bus_ops(pbus, dev)) {
		if (pbus == pbus->dev->bus) {
			printk(BIOS_ALERT, "%s in endless loop looking for a "
			       "parent bus with pci_bus_ops for %s, breaking "
			       "out.\n", __func__, dev_path(dev));
			break;
		}
		pbus = pbus->dev->bus;
	}

	if (!pbus || !pbus->dev || !pbus->dev->ops
	    || !pbus->dev->ops->ops_pci_bus) {
		/* This can happen before the device tree is fully set up. */

		// printk(BIOS_EMERG, "%s: Cannot find PCI bus operations.\n",
		// dev_path(dev));

		pbus = NULL;
	}

	return pbus;
}

/* Common PCI device function disable. */
void southcluster_enable_dev(device_t dev)
{
	uint32_t reg32;

	printk(BIOS_SPEW, "%s/%s ( %s )\n",
			__FILE__, __func__, dev_name(dev));
	if (!dev->enabled) {
		int slot = PCI_SLOT(dev->path.pci.devfn);
		int func = PCI_FUNC(dev->path.pci.devfn);
		printk(BIOS_DEBUG, "%s: Disabling device: %02x.%01x\n",
		       dev_path(dev), slot, func);

		/* Ensure memory, io, and bus master are all disabled */
		reg32 = pci_read_config32(dev, PCI_COMMAND);
		reg32 &= ~(PCI_COMMAND_MASTER |
			   PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
		pci_write_config32(dev, PCI_COMMAND, reg32);

		/* Place device in D3Hot */
		if (place_device_in_d3hot(dev) < 0) {
			printk(BIOS_WARNING,
			       "Could not place %02x.%01x into D3Hot. "
			       "Keeping device visible.\n", slot, func);
			return;
		}
		/* Disable this device if possible */
		sc_disable_devfn(dev);
	} else {
		/* Enable SERR */
		reg32 = pci_read_config32(dev, PCI_COMMAND);
		reg32 |= PCI_COMMAND_SERR;
		pci_write_config32(dev, PCI_COMMAND, reg32);
	}
}

/**
 * Initialize a specific device.
 *
 * The parent should be initialized first to avoid having an ordering problem.
 * This is done by calling the parent's init() method before its childrens'
 * init() methods.
 *
 * @param dev The device to be initialized.
 */
static void init_dev(struct device *dev)
{
	if (!dev->enabled)
		return;

	if (!dev->initialized && dev->ops && dev->ops->init) {
		if (dev->path.type == DEVICE_PATH_I2C) {
			printk(BIOS_DEBUG, "smbus: %s[%d]->",
			       dev_path(dev->bus->dev), dev->bus->link_num);
		}

		printk(BIOS_DEBUG, "%s init\n", dev_path(dev));
		dev->initialized = 1;
		dev->ops->init(dev);
	}
}

void set_io_addr_reg(device_t dev, u32 nodeid, u32 linkn, u32 reg,
				u32 io_min, u32 io_max)
{
	u32 i;
	u32 tempreg;

	/* io range allocation */
	tempreg = (nodeid&0xf) | ((nodeid & 0x30)<<(8-4)) | (linkn<<4) |  ((io_max&0xf0)<<(12-4)); //limit
	for (i=0; i<sysconf.nodes; i++)
		pci_write_config32(__f1_dev[i], reg+4, tempreg);

	tempreg = 3 /*| ( 3<<4)*/ | ((io_min&0xf0)<<(12-4));	      //base :ISA and VGA ?
#if 0
	// FIXME: can we use VGA reg instead?
	if (dev->link[link].bridge_ctrl & PCI_BRIDGE_CTL_VGA) {
		printk(BIOS_SPEW, "%s, enabling legacy VGA IO forwarding for %s link %s\n",
			__func__, dev_path(dev), link);
		tempreg |= PCI_IO_BASE_VGA_EN;
	}
	if (dev->link[link].bridge_ctrl & PCI_BRIDGE_CTL_NO_ISA) {
		tempreg |= PCI_IO_BASE_NO_ISA;
	}
#endif
	for (i=0; i<sysconf.nodes; i++)
		pci_write_config32(__f1_dev[i], reg, tempreg);
}

static void rl5c476_set_resources(device_t dev)
{
	struct resource *resource;
	printk(BIOS_DEBUG, "%s In set resources \n",dev_path(dev));
	if( enable_cf_boot && (PCI_FUNC(dev->path.pci.devfn) == 1)){
		resource = find_resource(dev,1);
		if( !(resource->flags & IORESOURCE_STORED) ){
			resource->flags |= IORESOURCE_STORED ;
			printk(BIOS_DEBUG, "%s 1 ==> %llx\n", dev_path(dev), resource->base);
			cf_base = resource->base;
		}
	}

	pci_dev_set_resources(dev);

}

struct bus *i2c_link(struct device *const dev)
{
	if (!dev || !dev->bus)
		return NULL;

	struct bus *link = dev->bus;
	while (link) {
		struct device *const parent = link->dev;

		if (parent && parent->ops &&
		    (parent->ops->ops_i2c_bus || parent->ops->ops_smbus_bus))
			break;

		if (parent && parent->bus)
			link = parent->bus;
		else
			link = NULL;
	}

	if (!link) {
		printk(BIOS_ALERT, "%s Cannot find I2C or SMBus bus operations",
		       dev_path(dev));
	}

	return link;
}