+/*
+ * This file is part of the coreboot project.
+ *
+ * It was originally based on the Linux kernel (arch/i386/kernel/pci-pc.c).
+ *
+ * Modifications are:
+ * Copyright (C) 2003 Eric Biederman <ebiederm@xmission.com>
+ * Copyright (C) 2003-2004 Linux Networx
+ * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
+ * Copyright (C) 2003 Ronald G. Minnich <rminnich@gmail.com>
+ * Copyright (C) 2004-2005 Li-Ta Lo <ollie@lanl.gov>
+ * Copyright (C) 2005-2006 Tyan
+ * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
+ * Copyright (C) 2005-2006 Stefan Reinauer <stepan@openbios.org>
+ * Copyright (C) 2009 Myles Watson <mylesgw@gmail.com>
+ */
+
/*
* (c) 1999--2000 Martin Mares <mj@suse.cz>
- * (c) 2003 Eric Biederman <ebiederm@xmission.com>
- * (c) 2003 Linux Networx
*/
-/* lots of mods by ron minnich (rminnich@lanl.gov), with
- * the final architecture guidance from Tom Merritt (tjm@codegen.com)
- * In particular, we changed from the one-pass original version to
- * Tom's recommended multiple-pass version. I wasn't sure about doing
+
+/*
+ * Lots of mods by Ron Minnich <rminnich@lanl.gov>, with
+ * the final architecture guidance from Tom Merritt <tjm@codegen.com>.
+ *
+ * In particular, we changed from the one-pass original version to
+ * Tom's recommended multiple-pass version. I wasn't sure about doing
* it with multiple passes, until I actually started doing it and saw
- * the wisdom of Tom's recommendations ...
+ * the wisdom of Tom's recommendations...
*
* Lots of cleanups by Eric Biederman to handle bridges, and to
- * handle resource allocation for non-pci devices.
+ * handle resource allocation for non-PCI devices.
*/
#include <console/console.h>
#include <stdlib.h>
#include <string.h>
#include <smp/spinlock.h>
+#if CONFIG_ARCH_X86
+#include <arch/ebda.h>
+#endif
/** Linked list of ALL devices */
struct device *all_devices = &dev_root;
/** Pointer to the last device */
-extern struct device **last_dev_p;
+extern struct device *last_dev;
+/** Linked list of free resources */
+struct resource *free_resources = NULL;
-/** The upper limit of MEM resource of the devices.
- * Reserve 20M for the system */
-#define DEVICE_MEM_HIGH 0xFEBFFFFFUL
-/** The lower limit of IO resource of the devices.
- * Reserve 4k for ISA/Legacy devices */
-#define DEVICE_IO_START 0x1000
+DECLARE_SPIN_LOCK(dev_lock)
/**
- * @brief Allocate a new device structure.
- *
- * Allocte a new device structure and attached it to the device tree as a
- * child of the parent bus.
+ * Allocate a new device structure.
*
- * @param parent parent bus the newly created device attached to.
- * @param path path to the device to be created.
+ * Allocte a new device structure and attach it to the device tree as a
+ * child of the parent bus.
*
- * @return pointer to the newly created device structure.
+ * @param parent Parent bus the newly created device should be attached to.
+ * @param path Path to the device to be created.
+ * @return Pointer to the newly created device structure.
*
* @see device_path
*/
-static spinlock_t dev_lock = SPIN_LOCK_UNLOCKED;
device_t alloc_dev(struct bus *parent, struct device_path *path)
{
device_t dev, child;
- int link;
- spin_lock(&dev_lock);
+ spin_lock(&dev_lock);
- /* Find the last child of our parent */
- for (child = parent->children; child && child->sibling; ) {
+ /* Find the last child of our parent. */
+ for (child = parent->children; child && child->sibling; /* */ )
child = child->sibling;
- }
dev = malloc(sizeof(*dev));
- if (dev == 0) {
- die("DEV: out of memory.\n");
- }
+ if (dev == 0)
+ die("alloc_dev(): out of memory.\n");
+
memset(dev, 0, sizeof(*dev));
memcpy(&dev->path, path, sizeof(*path));
- /* Initialize the back pointers in the link fields */
- for (link = 0; link < MAX_LINKS; link++) {
- dev->link[link].dev = dev;
- dev->link[link].link = link;
- }
-
- /* By default devices are enabled */
+ /* By default devices are enabled. */
dev->enabled = 1;
/* Add the new device to the list of children of the bus. */
dev->bus = parent;
- if (child) {
+ if (child)
child->sibling = dev;
- } else {
+ else
parent->children = dev;
- }
/* Append a new device to the global device list.
* The list is used to find devices once everything is set up.
*/
- *last_dev_p = dev;
- last_dev_p = &dev->next;
+ last_dev->next = dev;
+ last_dev = dev;
spin_unlock(&dev_lock);
return dev;
}
/**
- * @brief round a number up to an alignment.
- * @param val the starting value
- * @param roundup Alignment as a power of two
- * @returns rounded up number
+ * Round a number up to an alignment.
+ *
+ * @param val The starting value.
+ * @param roundup Alignment as a power of two.
+ * @return Rounded up number.
*/
static resource_t round(resource_t val, unsigned long pow)
{
return val;
}
-/** Read the resources on all devices of a given bus.
- * @param bus bus to read the resources on.
+/**
+ * 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_spew("%s read_resources bus %d link: %d\n",
- dev_path(bus->dev), bus->secondary, bus->link);
+ printk(BIOS_SPEW, "%s %s bus %x link: %d\n", dev_path(bus->dev),
+ __func__, bus->secondary, bus->link_num);
- /* Walk through all of the devices and find which resources they need. */
+ /* Walk through all devices and find which resources they need. */
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
- unsigned links;
- int i;
- if (curdev->have_resources) {
- continue;
- }
- if (!curdev->enabled) {
+ struct bus *link;
+
+ if (!curdev->enabled)
continue;
- }
+
if (!curdev->ops || !curdev->ops->read_resources) {
- printk_err("%s missing read_resources\n",
- dev_path(curdev));
+ printk(BIOS_ERR, "%s missing read_resources\n",
+ dev_path(curdev));
continue;
}
curdev->ops->read_resources(curdev);
- curdev->have_resources = 1;
- /* Read in subtractive resources behind the current device */
- links = 0;
- for (i = 0; i < curdev->resources; i++) {
- struct resource *resource;
- unsigned link;
- resource = &curdev->resource[i];
- if (!(resource->flags & IORESOURCE_SUBTRACTIVE))
- continue;
- link = IOINDEX_SUBTRACTIVE_LINK(resource->index);
- if (link > MAX_LINKS) {
- printk_err("%s subtractive index on link: %d\n",
- dev_path(curdev), link);
- continue;
- }
- if (!(links & (1 << link))) {
- links |= (1 << link);
- read_resources(&curdev->link[resource->index]);
-
- }
- }
+
+ /* Read in the resources behind the current device's links. */
+ for (link = curdev->link_list; link; link = link->next)
+ read_resources(link);
}
- printk_spew("%s read_resources bus %d link: %d done\n",
- dev_path(bus->dev), bus->secondary, bus->link);
+ printk(BIOS_SPEW, "%s read_resources bus %d link: %d done\n",
+ dev_path(bus->dev), bus->secondary, bus->link_num);
}
struct pick_largest_state {
struct resource *last;
- struct device *result_dev;
+ struct device *result_dev;
struct resource *result;
int seen_last;
};
-static void pick_largest_resource(void *gp,
- struct device *dev, struct resource *resource)
+static void pick_largest_resource(void *gp, struct device *dev,
+ struct resource *resource)
{
struct pick_largest_state *state = gp;
struct resource *last;
+
last = state->last;
- /* Be certain to pick the successor to last */
+
+ /* Be certain to pick the successor to last. */
if (resource == last) {
state->seen_last = 1;
return;
}
- if (last && (
- (last->align < resource->align) ||
- ((last->align == resource->align) &&
- (last->size < resource->size)) ||
- ((last->align == resource->align) &&
- (last->size == resource->size) &&
- (!state->seen_last)))) {
+ if (resource->flags & IORESOURCE_FIXED)
+ return; /* Skip it. */
+ if (last && ((last->align < resource->align) ||
+ ((last->align == resource->align) &&
+ (last->size < resource->size)) ||
+ ((last->align == resource->align) &&
+ (last->size == resource->size) && (!state->seen_last)))) {
return;
}
- if (!state->result ||
+ if (!state->result ||
(state->result->align < resource->align) ||
((state->result->align == resource->align) &&
(state->result->size < resource->size))) {
state->result_dev = dev;
state->result = resource;
- }
+ }
}
-static struct device *largest_resource(struct bus *bus, struct resource **result_res,
- unsigned long type_mask, unsigned long type)
+static struct device *largest_resource(struct bus *bus,
+ struct resource **result_res,
+ unsigned long type_mask,
+ unsigned long type)
{
struct pick_largest_state state;
state.last = *result_res;
- state.result_dev = 0;
- state.result = 0;
+ state.result_dev = NULL;
+ state.result = NULL;
state.seen_last = 0;
- search_bus_resources(bus, type_mask, type, pick_largest_resource, &state);
+ search_bus_resources(bus, type_mask, type, pick_largest_resource,
+ &state);
*result_res = state.result;
return state.result_dev;
}
-/* Compute allocate resources is the guts of the resource allocator.
- *
+/**
+ * This function is the guts of the resource allocator.
+ *
* The problem.
- * - Allocate resources locations for every device.
+ * - Allocate resource locations for every device.
* - Don't overlap, and follow the rules of bridges.
* - Don't overlap with resources in fixed locations.
* - Be efficient so we don't have ugly strategies.
*
* The strategy.
* - Devices that have fixed addresses are the minority so don't
- * worry about them too much. Instead only use part of the address
- * space for devices with programmable addresses. This easily handles
+ * worry about them too much. Instead only use part of the address
+ * space for devices with programmable addresses. This easily handles
* everything except bridges.
*
- * - PCI devices are required to have thier sizes and their alignments
- * equal. In this case an optimal solution to the packing problem
- * exists. Allocate all devices from highest alignment to least
- * alignment or vice versa. Use this.
+ * - PCI devices are required to have their sizes and their alignments
+ * equal. In this case an optimal solution to the packing problem
+ * exists. Allocate all devices from highest alignment to least
+ * alignment or vice versa. Use this.
*
- * - So we can handle more than PCI run two allocation passes on
- * bridges. The first to see how large the resources are behind
- * the bridge, and what their alignment requirements are. The
- * second to assign a safe address to the devices behind the
- * bridge. This allows me to treat a bridge as just a device with
- * a couple of resources, and not need to special case it in the
- * allocator. Also this allows handling of other types of bridges.
+ * - So we can handle more than PCI run two allocation passes on bridges. The
+ * first to see how large the resources are behind the bridge, and what
+ * their alignment requirements are. The second to assign a safe address to
+ * the devices behind the bridge. This allows us to treat a bridge as just
+ * a device with a couple of resources, and not need to special case it in
+ * the allocator. Also this allows handling of other types of bridges.
*
+ * @param bus The bus we are traversing.
+ * @param bridge The bridge resource which must contain the bus' resources.
+ * @param type_mask This value gets ANDed with the resource type.
+ * @param type This value must match the result of the AND.
+ * @return TODO
*/
-
-void compute_allocate_resource(
- struct bus *bus,
- struct resource *bridge,
- unsigned long type_mask,
- unsigned long type)
+static void compute_resources(struct bus *bus, struct resource *bridge,
+ unsigned long type_mask, unsigned long type)
{
struct device *dev;
struct resource *resource;
resource_t base;
- unsigned long align, min_align;
- min_align = 0;
- base = bridge->base;
+ base = round(bridge->base, bridge->align);
- printk_spew("%s compute_allocate_%s: base: %08Lx size: %08Lx align: %d gran: %d\n",
- dev_path(bus->dev),
- (bridge->flags & IORESOURCE_IO)? "io":
- (bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
- base, bridge->size, bridge->align, bridge->gran);
+ printk(BIOS_SPEW, "%s %s_%s: base: %llx size: %llx align: %d gran: %d"
+ " limit: %llx\n", dev_path(bus->dev), __func__,
+ (type & IORESOURCE_IO) ? "io" : (type & IORESOURCE_PREFETCH) ?
+ "prefmem" : "mem", base, bridge->size, bridge->align,
+ bridge->gran, bridge->limit);
- /* We want different minimum alignments for different kinds of
- * resources. These minimums are not device type specific
- * but resource type specific.
- */
- if (bridge->flags & IORESOURCE_IO) {
- min_align = log2(DEVICE_IO_ALIGN);
- }
- if (bridge->flags & IORESOURCE_MEM) {
- min_align = log2(DEVICE_MEM_ALIGN);
- }
+ /* For each child which is a bridge, compute the resource needs. */
+ for (dev = bus->children; dev; dev = dev->sibling) {
+ struct resource *child_bridge;
+
+ if (!dev->link_list)
+ continue;
- /* Make certain I have read in all of the resources */
- read_resources(bus);
+ /* Find the resources with matching type flags. */
+ for (child_bridge = dev->resource_list; child_bridge;
+ child_bridge = child_bridge->next) {
+ struct bus* link;
+
+ if (!(child_bridge->flags & IORESOURCE_BRIDGE)
+ || (child_bridge->flags & type_mask) != type)
+ continue;
+
+ /*
+ * Split prefetchable memory if combined. Many domains
+ * use the same address space for prefetchable memory
+ * and non-prefetchable memory. Bridges below them need
+ * it separated. Add the PREFETCH flag to the type_mask
+ * and type.
+ */
+ link = dev->link_list;
+ while (link && link->link_num !=
+ IOINDEX_LINK(child_bridge->index))
+ link = link->next;
+
+ if (link == NULL) {
+ printk(BIOS_ERR, "link %ld not found on %s\n",
+ IOINDEX_LINK(child_bridge->index),
+ dev_path(dev));
+ }
+
+ compute_resources(link, child_bridge,
+ type_mask | IORESOURCE_PREFETCH,
+ type | (child_bridge->flags &
+ IORESOURCE_PREFETCH));
+ }
+ }
- /* Remember I haven't found anything yet. */
- resource = 0;
+ /* Remember we haven't found anything yet. */
+ resource = NULL;
- /* Walk through all the devices on the current bus and
- * compute the addresses.
+ /*
+ * Walk through all the resources on the current bus and compute the
+ * amount of address space taken by them. Take granularity and
+ * alignment into account.
*/
while ((dev = largest_resource(bus, &resource, type_mask, type))) {
- resource_t size;
- /* Do NOT I repeat do not ignore resources which have zero size.
- * If they need to be ignored dev->read_resources should not even
- * return them. Some resources must be set even when they have
- * no size. PCI bridge resources are a good example of this.
- */
- /* Propogate the resource alignment to the bridge register */
- if (resource->align > bridge->align) {
+
+ /* Size 0 resources can be skipped. */
+ if (!resource->size)
+ continue;
+
+ /* Propagate the resource alignment to the bridge resource. */
+ if (resource->align > bridge->align)
bridge->align = resource->align;
+
+ /* Propagate the resource limit to the bridge register. */
+ if (bridge->limit > resource->limit)
+ bridge->limit = resource->limit;
+
+ /* Warn if it looks like APICs aren't declared. */
+ if ((resource->limit == 0xffffffff) &&
+ (resource->flags & IORESOURCE_ASSIGNED)) {
+ printk(BIOS_ERR,
+ "Resource limit looks wrong! (no APIC?)\n");
+ printk(BIOS_ERR, "%s %02lx limit %08llx\n",
+ dev_path(dev), resource->index, resource->limit);
}
- /* Make certain we are dealing with a good minimum size */
- size = resource->size;
- align = resource->align;
- if (align < min_align) {
- align = min_align;
+ if (resource->flags & IORESOURCE_IO) {
+ /*
+ * Don't allow potential aliases over the legacy PCI
+ * expansion card addresses. The legacy PCI decodes
+ * only 10 bits, uses 0x100 - 0x3ff. Therefore, only
+ * 0x00 - 0xff can be used out of each 0x400 block of
+ * I/O space.
+ */
+ if ((base & 0x300) != 0) {
+ base = (base & ~0x3ff) + 0x400;
+ }
+ /*
+ * Don't allow allocations in the VGA I/O range.
+ * PCI has special cases for that.
+ */
+ else if ((base >= 0x3b0) && (base <= 0x3df)) {
+ base = 0x3e0;
+ }
}
- if (resource->flags & IORESOURCE_FIXED) {
+ /* Base must be aligned. */
+ base = round(base, resource->align);
+ resource->base = base;
+ base += resource->size;
+
+ printk(BIOS_SPEW, "%s %02lx * [0x%llx - 0x%llx] %s\n",
+ dev_path(dev), resource->index, resource->base,
+ resource->base + resource->size - 1,
+ (resource->flags & IORESOURCE_IO) ? "io" :
+ (resource->flags & IORESOURCE_PREFETCH) ?
+ "prefmem" : "mem");
+ }
+
+ /*
+ * A PCI bridge resource does not need to be a power of two size, but
+ * it does have a minimum granularity. Round the size up to that
+ * minimum granularity so we know not to place something else at an
+ * address postitively decoded by the bridge.
+ */
+ bridge->size = round(base, bridge->gran) -
+ round(bridge->base, bridge->align);
+
+ printk(BIOS_SPEW, "%s %s_%s: base: %llx size: %llx align: %d gran: %d"
+ " limit: %llx done\n", dev_path(bus->dev), __func__,
+ (bridge->flags & IORESOURCE_IO) ? "io" :
+ (bridge->flags & IORESOURCE_PREFETCH) ? "prefmem" : "mem",
+ base, bridge->size, bridge->align, bridge->gran, bridge->limit);
+}
+
+/**
+ * This function is the second part of the resource allocator.
+ *
+ * See the compute_resources function for a more detailed explanation.
+ *
+ * This function assigns the resources a value.
+ *
+ * @param bus The bus we are traversing.
+ * @param bridge The bridge resource which must contain the bus' resources.
+ * @param type_mask This value gets ANDed with the resource type.
+ * @param type This value must match the result of the AND.
+ *
+ * @see compute_resources
+ */
+static void allocate_resources(struct bus *bus, struct resource *bridge,
+ unsigned long type_mask, unsigned long type)
+{
+ struct device *dev;
+ struct resource *resource;
+ resource_t base;
+ base = bridge->base;
+
+ printk(BIOS_SPEW, "%s %s_%s: base:%llx size:%llx align:%d gran:%d "
+ "limit:%llx\n", dev_path(bus->dev), __func__,
+ (type & IORESOURCE_IO) ? "io" : (type & IORESOURCE_PREFETCH) ?
+ "prefmem" : "mem",
+ base, bridge->size, bridge->align, bridge->gran, bridge->limit);
+
+ /* Remember we haven't found anything yet. */
+ resource = NULL;
+
+ /*
+ * Walk through all the resources on the current bus and allocate them
+ * address space.
+ */
+ while ((dev = largest_resource(bus, &resource, type_mask, type))) {
+
+ /* Propagate the bridge limit to the resource register. */
+ if (resource->limit > bridge->limit)
+ resource->limit = bridge->limit;
+
+ /* Size 0 resources can be skipped. */
+ if (!resource->size) {
+ /* Set the base to limit so it doesn't confuse tolm. */
+ resource->base = resource->limit;
+ resource->flags |= IORESOURCE_ASSIGNED;
continue;
}
- /* Propogate the resource limit to the bridge register */
- if (bridge->limit > resource->limit) {
- bridge->limit = resource->limit;
- }
- /* Artificially deny limits between DEVICE_MEM_HIGH and 0xffffffff */
- if ((bridge->limit > DEVICE_MEM_HIGH) && (bridge->limit <= 0xffffffff)) {
- bridge->limit = DEVICE_MEM_HIGH;
- }
+
if (resource->flags & IORESOURCE_IO) {
- /* Don't allow potential aliases over the
- * legacy pci expansion card addresses.
- * The legacy pci decodes only 10 bits,
- * uses 100h - 3ffh. Therefor, only 0 - ff
- * can be used out of each 400h block of io
- * space.
+ /*
+ * Don't allow potential aliases over the legacy PCI
+ * expansion card addresses. The legacy PCI decodes
+ * only 10 bits, uses 0x100 - 0x3ff. Therefore, only
+ * 0x00 - 0xff can be used out of each 0x400 block of
+ * I/O space.
*/
if ((base & 0x300) != 0) {
base = (base & ~0x3ff) + 0x400;
}
- /* Don't allow allocations in the VGA IO range.
+ /*
+ * Don't allow allocations in the VGA I/O range.
* PCI has special cases for that.
*/
else if ((base >= 0x3b0) && (base <= 0x3df)) {
base = 0x3e0;
}
}
- if (((round(base, align) + size) -1) <= resource->limit) {
- /* base must be aligned to size */
- base = round(base, align);
+
+ if ((round(base, resource->align) + resource->size - 1) <=
+ resource->limit) {
+ /* Base must be aligned. */
+ base = round(base, resource->align);
resource->base = base;
resource->flags |= IORESOURCE_ASSIGNED;
resource->flags &= ~IORESOURCE_STORED;
- base += size;
-
- printk_spew("%s %02x * [0x%08Lx - 0x%08Lx] %s\n",
- dev_path(dev),
- resource->index,
- resource->base,
- resource->base + resource->size - 1,
- (resource->flags & IORESOURCE_IO)? "io":
- (resource->flags & IORESOURCE_PREFETCH)? "prefmem": "mem");
+ base += resource->size;
+ } else {
+ printk(BIOS_ERR, "!! Resource didn't fit !!\n");
+ printk(BIOS_ERR, " aligned base %llx size %llx "
+ "limit %llx\n", round(base, resource->align),
+ resource->size, resource->limit);
+ printk(BIOS_ERR, " %llx needs to be <= %llx "
+ "(limit)\n", (round(base, resource->align) +
+ resource->size) - 1, resource->limit);
+ printk(BIOS_ERR, " %s%s %02lx * [0x%llx - 0x%llx]"
+ " %s\n", (resource->flags & IORESOURCE_ASSIGNED)
+ ? "Assigned: " : "", dev_path(dev),
+ resource->index, resource->base,
+ resource->base + resource->size - 1,
+ (resource->flags & IORESOURCE_IO) ? "io"
+ : (resource->flags & IORESOURCE_PREFETCH)
+ ? "prefmem" : "mem");
}
+
+ printk(BIOS_SPEW, "%s%s %02lx * [0x%llx - 0x%llx] %s\n",
+ (resource->flags & IORESOURCE_ASSIGNED) ? "Assigned: "
+ : "", dev_path(dev), resource->index, resource->base,
+ resource->size ? resource->base + resource->size - 1 :
+ resource->base, (resource->flags & IORESOURCE_IO)
+ ? "io" : (resource->flags & IORESOURCE_PREFETCH)
+ ? "prefmem" : "mem");
}
- /* A pci bridge resource does not need to be a power
- * of two size, but it does have a minimum granularity.
- * Round the size up to that minimum granularity so we
- * know not to place something else at an address postitively
- * decoded by the bridge.
+
+ /*
+ * A PCI bridge resource does not need to be a power of two size, but
+ * it does have a minimum granularity. Round the size up to that
+ * minimum granularity so we know not to place something else at an
+ * address positively decoded by the bridge.
*/
- bridge->size = round(base, bridge->gran) - bridge->base;
- printk_spew("%s compute_allocate_%s: base: %08Lx size: %08Lx align: %d gran: %d done\n",
- dev_path(bus->dev),
- (bridge->flags & IORESOURCE_IO)? "io":
- (bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
- base, bridge->size, bridge->align, bridge->gran);
+ bridge->flags |= IORESOURCE_ASSIGNED;
+
+ printk(BIOS_SPEW, "%s %s_%s: next_base: %llx size: %llx align: %d "
+ "gran: %d done\n", dev_path(bus->dev), __func__,
+ (type & IORESOURCE_IO) ? "io" : (type & IORESOURCE_PREFETCH) ?
+ "prefmem" : "mem", base, bridge->size, bridge->align,
+ bridge->gran);
+
+ /* For each child which is a bridge, allocate_resources. */
+ for (dev = bus->children; dev; dev = dev->sibling) {
+ struct resource *child_bridge;
+
+ if (!dev->link_list)
+ continue;
+
+ /* Find the resources with matching type flags. */
+ for (child_bridge = dev->resource_list; child_bridge;
+ child_bridge = child_bridge->next) {
+ struct bus* link;
+
+ if (!(child_bridge->flags & IORESOURCE_BRIDGE) ||
+ (child_bridge->flags & type_mask) != type)
+ continue;
+
+ /*
+ * Split prefetchable memory if combined. Many domains
+ * use the same address space for prefetchable memory
+ * and non-prefetchable memory. Bridges below them need
+ * it separated. Add the PREFETCH flag to the type_mask
+ * and type.
+ */
+ link = dev->link_list;
+ while (link && link->link_num !=
+ IOINDEX_LINK(child_bridge->index))
+ link = link->next;
+ if (link == NULL)
+ printk(BIOS_ERR, "link %ld not found on %s\n",
+ IOINDEX_LINK(child_bridge->index),
+ dev_path(dev));
+
+ allocate_resources(link, child_bridge,
+ type_mask | IORESOURCE_PREFETCH,
+ type | (child_bridge->flags &
+ IORESOURCE_PREFETCH));
+ }
+ }
+}
+
+#if CONFIG_PCI_64BIT_PREF_MEM == 1
+#define MEM_MASK (IORESOURCE_PREFETCH | IORESOURCE_MEM)
+#else
+#define MEM_MASK (IORESOURCE_MEM)
+#endif
+
+#define IO_MASK (IORESOURCE_IO)
+#define PREF_TYPE (IORESOURCE_PREFETCH | IORESOURCE_MEM)
+#define MEM_TYPE (IORESOURCE_MEM)
+#define IO_TYPE (IORESOURCE_IO)
+
+struct constraints {
+ struct resource pref, io, mem;
+};
+
+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 %s@%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);
+ }
+ }
+}
+
+static void avoid_fixed_resources(struct device *dev)
+{
+ struct constraints limits;
+ struct resource *res;
+
+ printk(BIOS_SPEW, "%s: %s\n", __func__, dev_path(dev));
+
+ /* Initialize constraints to maximum size. */
+ limits.pref.base = 0;
+ limits.pref.limit = 0xffffffffffffffffULL;
+ limits.io.base = 0;
+ limits.io.limit = 0xffffffffffffffffULL;
+ limits.mem.base = 0;
+ limits.mem.limit = 0xffffffffffffffffULL;
+
+ /* Constrain the limits to dev's initial resources. */
+ for (res = dev->resource_list; res; res = res->next) {
+ if ((res->flags & IORESOURCE_FIXED))
+ continue;
+ printk(BIOS_SPEW, "%s:@%s %02lx limit %08llx\n", __func__,
+ dev_path(dev), res->index, res->limit);
+ if ((res->flags & MEM_MASK) == PREF_TYPE &&
+ (res->limit < limits.pref.limit))
+ limits.pref.limit = res->limit;
+ if ((res->flags & MEM_MASK) == MEM_TYPE &&
+ (res->limit < limits.mem.limit))
+ limits.mem.limit = res->limit;
+ if ((res->flags & IO_MASK) == IO_TYPE &&
+ (res->limit < limits.io.limit))
+ limits.io.limit = res->limit;
+ }
+
+ /* Look through the tree for fixed resources and update the limits. */
+ constrain_resources(dev, &limits);
+
+ /* Update dev's resources with new limits. */
+ for (res = dev->resource_list; res; res = res->next) {
+ struct resource *lim;
+
+ if ((res->flags & IORESOURCE_FIXED))
+ 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;
+ printk(BIOS_SPEW, "%s2: %s@%02lx limit %08llx\n", __func__,
+ dev_path(dev), res->index, res->limit);
+ printk(BIOS_SPEW, "\tlim->base %08llx lim->limit %08llx\n",
+ lim->base, lim->limit);
+ /* Is the resource outside the limits? */
+ if (lim->base > res->base)
+ res->base = lim->base;
+ if (res->limit > lim->limit)
+ res->limit = lim->limit;
+ }
}
-#if CONFIG_CONSOLE_VGA == 1
+
+#if CONFIG_VGA_BRIDGE_SETUP == 1
device_t vga_pri = 0;
-static void allocate_vga_resource(void)
+static void set_vga_bridge_bits(void)
{
-#warning "FIXME modify allocate_vga_resource so it is less pci centric!"
-#warning "This function knows to much about PCI stuff, it should be just a ietrator/visitor."
+ /*
+ * FIXME: Modify set_vga_bridge() so it is less PCI centric!
+ * This function knows too much about PCI stuff, it should be just
+ * an iterator/visitor.
+ */
- /* FIXME handle the VGA pallette snooping */
- struct device *dev, *vga, *vga_onboard;
+ /* FIXME: Handle the VGA palette snooping. */
+ struct device *dev, *vga, *vga_onboard, *vga_first, *vga_last;
struct bus *bus;
+
bus = 0;
vga = 0;
vga_onboard = 0;
+ vga_first = 0;
+ vga_last = 0;
+
for (dev = all_devices; dev; dev = dev->next) {
- if ( !dev->enabled ) continue;
+
+ if (!dev->enabled)
+ continue;
+
if (((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) &&
((dev->class >> 8) != PCI_CLASS_DISPLAY_OTHER)) {
- if (!vga) {
- if (dev->on_mainboard) {
+ if (!vga_first) {
+ if (dev->on_mainboard)
+ vga_onboard = dev;
+ else
+ vga_first = dev;
+ } else {
+ if (dev->on_mainboard)
vga_onboard = dev;
- }
- else {
- vga = dev;
- }
+ else
+ vga_last = dev;
}
- /* It isn't safe to enable other VGA cards */
+
+ /* It isn't safe to enable other VGA cards. */
dev->command &= ~(PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
}
}
-
- if (!vga) {
+
+ vga = vga_last;
+
+ if (!vga)
+ vga = vga_first;
+
+#if CONFIG_ONBOARD_VGA_IS_PRIMARY == 1
+ if (vga_onboard) /* Will use onboard VGA as primary. */
+#else
+ if (!vga) /* Will use last add-on adapter as primary. */
+#endif
+ {
vga = vga_onboard;
}
-
- if (vga) { // vga is first add on card or the only onboard vga
- printk_debug("Allocating VGA resource %s\n", dev_path(vga));
+
+ if (vga) {
+ /* VGA is first add-on card or the only onboard VGA. */
+ printk(BIOS_DEBUG, "Setting up VGA for %s\n", dev_path(vga));
+ /* All legacy VGA cards have MEM & I/O space registers. */
vga->command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
vga_pri = vga;
bus = vga->bus;
}
- /* Now walk up the bridges setting the VGA enable */
+
+ /* Now walk up the bridges setting the VGA enable. */
while (bus) {
- printk_debug("Setting PCI_BRIDGE_CTL_VGA for bridge %s\n",
- dev_path(bus->dev));
+ printk(BIOS_DEBUG, "Setting PCI_BRIDGE_CTL_VGA for bridge %s\n",
+ dev_path(bus->dev));
bus->bridge_ctrl |= PCI_BRIDGE_CTL_VGA;
- bus = (bus == bus->dev->bus)? 0 : bus->dev->bus;
- }
+ bus = (bus == bus->dev->bus) ? 0 : bus->dev->bus;
+ }
}
#endif
-
/**
- * @brief Assign the computed resources to the devices on the bus.
- *
- * @param bus Pointer to the structure for this bus
+ * Assign the computed resources to the devices on the bus.
*
- * Use the device specific set_resources method to store the computed
+ * Use the device specific set_resources() method to store the computed
* resources to hardware. For bridge devices, the set_resources() method
* has to recurse into every down stream buses.
*
* Mutual recursion:
* assign_resources() -> device_operation::set_resources()
* device_operation::set_resources() -> assign_resources()
+ *
+ * @param bus Pointer to the structure for this bus.
*/
void assign_resources(struct bus *bus)
{
struct device *curdev;
- printk_spew("%s assign_resources, bus %d link: %d\n",
- dev_path(bus->dev), bus->secondary, bus->link);
+ printk(BIOS_SPEW, "%s assign_resources, bus %d link: %d\n",
+ dev_path(bus->dev), bus->secondary, bus->link_num);
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
- if (!curdev->enabled || !curdev->resources) {
+ if (!curdev->enabled || !curdev->resource_list)
continue;
- }
+
if (!curdev->ops || !curdev->ops->set_resources) {
- printk_err("%s missing set_resources\n",
- dev_path(curdev));
+ printk(BIOS_ERR, "%s missing set_resources\n",
+ dev_path(curdev));
continue;
}
curdev->ops->set_resources(curdev);
}
- printk_spew("%s assign_resources, bus %d link: %d\n",
- dev_path(bus->dev), bus->secondary, bus->link);
+ printk(BIOS_SPEW, "%s assign_resources, bus %d link: %d\n",
+ dev_path(bus->dev), bus->secondary, bus->link_num);
}
/**
- * @brief Enable the resources for a specific device
- *
- * @param dev the device whose resources are to be enabled
+ * Enable the resources for devices on a link.
*
* Enable resources of the device by calling the device specific
* enable_resources() method.
*
* The parent's resources should be enabled first to avoid having enabling
* order problem. This is done by calling the parent's enable_resources()
- * method and let that method to call it's children's enable_resoruces()
- * method via the (global) enable_childrens_resources().
+ * method before its childrens' enable_resources() methods.
*
- * Indirect mutual recursion:
- * enable_resources() -> device_operations::enable_resource()
- * device_operations::enable_resource() -> enable_children_resources()
- * enable_children_resources() -> enable_resources()
+ * @param link The link whose devices' resources are to be enabled.
*/
-void enable_resources(struct device *dev)
+static void enable_resources(struct bus *link)
{
- if (!dev->enabled) {
- return;
+ struct device *dev;
+ struct bus *c_link;
+
+ for (dev = link->children; dev; dev = dev->sibling) {
+ if (dev->enabled && dev->ops && dev->ops->enable_resources)
+ dev->ops->enable_resources(dev);
}
- if (!dev->ops || !dev->ops->enable_resources) {
- printk_err("%s missing enable_resources\n", dev_path(dev));
- return;
+
+ for (dev = link->children; dev; dev = dev->sibling) {
+ for (c_link = dev->link_list; c_link; c_link = c_link->next)
+ enable_resources(c_link);
+ }
+}
+
+/**
+ * Reset all of the devices on a bus and clear the bus's reset_needed flag.
+ *
+ * @param bus Pointer to the bus structure.
+ * @return 1 if the bus was successfully reset, 0 otherwise.
+ */
+int reset_bus(struct bus *bus)
+{
+ if (bus && bus->dev && bus->dev->ops && bus->dev->ops->reset_bus) {
+ bus->dev->ops->reset_bus(bus);
+ bus->reset_needed = 0;
+ return 1;
}
- dev->ops->enable_resources(dev);
+ return 0;
}
/**
- * @brief Determine the existence of devices and extend the device tree.
+ * Scan for devices on a bus.
+ *
+ * If there are bridges on the bus, recursively scan the buses behind the
+ * bridges. If the setting up and tuning of the bus causes a reset to be
+ * required, reset the bus and scan it again.
*
- * Most of the devices in the system are listed in the mainboard Config.lb
+ * @param busdev Pointer to the bus device.
+ * @param max Current bus number.
+ * @return The maximum bus number found, after scanning all subordinate buses.
+ */
+unsigned int scan_bus(struct device *busdev, unsigned int max)
+{
+ unsigned int new_max;
+ int do_scan_bus;
+
+ if (!busdev || !busdev->enabled || !busdev->ops ||
+ !busdev->ops->scan_bus) {
+ return max;
+ }
+
+ do_scan_bus = 1;
+ while (do_scan_bus) {
+ struct bus *link;
+ new_max = busdev->ops->scan_bus(busdev, max);
+ do_scan_bus = 0;
+ for (link = busdev->link_list; link; link = link->next) {
+ if (link->reset_needed) {
+ if (reset_bus(link))
+ do_scan_bus = 1;
+ else
+ busdev->bus->reset_needed = 1;
+ }
+ }
+ }
+ return new_max;
+}
+
+/**
+ * Determine the existence of devices and extend the device tree.
+ *
+ * Most of the devices in the system are listed in the mainboard devicetree.cb
* file. The device structures for these devices are generated at compile
* time by the config tool and are organized into the device tree. This
* function determines if the devices created at compile time actually exist
* in the physical system.
*
- * For devices in the physical system but not listed in the Config.lb file,
+ * For devices in the physical system but not listed in devicetree.cb,
* the device structures have to be created at run time and attached to the
* device tree.
*
- * This function starts from the root device 'dev_root', scan the buses in
- * the system recursively, modify the device tree according to the result of
- * the probe.
+ * This function starts from the root device 'dev_root', scans the buses in
+ * the system recursively, and modifies the device tree according to the
+ * result of the probe.
*
* This function has no idea how to scan and probe buses and devices at all.
* It depends on the bus/device specific scan_bus() method to do it. The
* scan_bus() method also has to create the device structure and attach
- * it to the device tree.
+ * it to the device tree.
*/
void dev_enumerate(void)
{
struct device *root;
- unsigned subordinate;
- printk_info("Enumerating buses...\n");
+
+ printk(BIOS_INFO, "Enumerating buses...\n");
+
root = &dev_root;
- if (root->chip_ops && root->chip_ops->enable_dev) {
+
+ show_all_devs(BIOS_SPEW, "Before device enumeration.");
+ printk(BIOS_SPEW, "Compare with tree...\n");
+ show_devs_tree(root, BIOS_SPEW, 0, 0);
+
+ if (root->chip_ops && root->chip_ops->enable_dev)
root->chip_ops->enable_dev(root);
- }
+
if (!root->ops || !root->ops->scan_bus) {
- printk_err("dev_root missing scan_bus operation");
+ printk(BIOS_ERR, "dev_root missing scan_bus operation");
return;
}
- subordinate = root->ops->scan_bus(root, 0);
- printk_info("done\n");
+ printk(BIOS_INFO, "Enumerating buses... starting with root now\n");
+ scan_bus(root, 0);
+ printk(BIOS_INFO, "done\n");
}
/**
- * @brief Configure devices on the devices tree.
- *
+ * Configure devices on the devices tree.
+ *
* Starting at the root of the device tree, travel it recursively in two
* passes. In the first pass, we compute and allocate resources (ranges)
* requried by each device. In the second pass, the resources ranges are
* relocated to their final position and stored to the hardware.
*
- * I/O resources start at DEVICE_IO_START and grow upward. MEM resources start
- * at DEVICE_MEM_START and grow downward.
+ * I/O resources grow upward. MEM resources grow downward.
*
* Since the assignment is hierarchical we set the values into the dev_root
- * struct.
+ * struct.
*/
void dev_configure(void)
{
- struct resource *io, *mem;
+ struct resource *res;
struct device *root;
+ struct device *child;
- printk_info("Allocating resources...\n");
+#if CONFIG_VGA_BRIDGE_SETUP == 1
+ set_vga_bridge_bits();
+#endif
+
+ printk(BIOS_INFO, "Allocating resources...\n");
root = &dev_root;
- if (!root->ops || !root->ops->read_resources) {
- printk_err("dev_root missing read_resources\n");
- return;
- }
- if (!root->ops || !root->ops->set_resources) {
- printk_err("dev_root missing set_resources\n");
- return;
- }
- printk_info("Reading resources...\n");
- root->ops->read_resources(root);
- printk_info("Done reading resources.\n");
-
- /* Get the resources */
- io = &root->resource[0];
- mem = &root->resource[1];
- /* Make certain the io devices are allocated somewhere safe. */
- io->base = DEVICE_IO_START;
- io->flags |= IORESOURCE_ASSIGNED;
- io->flags &= ~IORESOURCE_STORED;
- /* Now reallocate the pci resources memory with the
- * highest addresses I can manage.
+ /*
+ * Each domain should create resources which contain the entire address
+ * space for IO, MEM, and PREFMEM resources in the domain. The
+ * allocation of device resources will be done from this address space.
*/
- mem->base = resource_max(&root->resource[1]);
- mem->flags |= IORESOURCE_ASSIGNED;
- mem->flags &= ~IORESOURCE_STORED;
-#if CONFIG_CONSOLE_VGA == 1
- /* Allocate the VGA I/O resource.. */
- allocate_vga_resource();
-#endif
+ /* Read the resources for the entire tree. */
+
+ printk(BIOS_INFO, "Reading resources...\n");
+ read_resources(root->link_list);
+ printk(BIOS_INFO, "Done reading resources.\n");
+
+ print_resource_tree(root, BIOS_SPEW, "After reading.");
+
+ /* Compute resources for all domains. */
+ for (child = root->link_list->children; child; child = child->sibling) {
+ if (!(child->path.type == DEVICE_PATH_PCI_DOMAIN))
+ continue;
+ for (res = child->resource_list; res; res = res->next) {
+ if (res->flags & IORESOURCE_FIXED)
+ continue;
+ if (res->flags & IORESOURCE_PREFETCH) {
+ compute_resources(child->link_list,
+ res, MEM_MASK, PREF_TYPE);
+ continue;
+ }
+ if (res->flags & IORESOURCE_MEM) {
+ compute_resources(child->link_list,
+ res, MEM_MASK, MEM_TYPE);
+ continue;
+ }
+ if (res->flags & IORESOURCE_IO) {
+ compute_resources(child->link_list,
+ res, IO_MASK, IO_TYPE);
+ continue;
+ }
+ }
+ }
+
+ /* For all domains. */
+ for (child = root->link_list->children; child; child=child->sibling)
+ if (child->path.type == DEVICE_PATH_PCI_DOMAIN)
+ avoid_fixed_resources(child);
+
+ /*
+ * Now we need to adjust the resources. MEM resources need to start at
+ * the highest address managable.
+ */
+ for (child = root->link_list->children; child; child = child->sibling) {
+ if (child->path.type != DEVICE_PATH_PCI_DOMAIN)
+ continue;
+ for (res = child->resource_list; res; res = res->next) {
+ if (!(res->flags & IORESOURCE_MEM) ||
+ res->flags & IORESOURCE_FIXED)
+ continue;
+ res->base = resource_max(res);
+ }
+ }
/* Store the computed resource allocations into device registers ... */
- printk_info("Setting resources...\n");
- root->ops->set_resources(root);
- printk_info("Done setting resources.\n");
-#if 0
- mem->flags |= IORESOURCE_STORED;
- report_resource_stored(root, mem, "");
-#endif
+ printk(BIOS_INFO, "Setting resources...\n");
+ for (child = root->link_list->children; child; child = child->sibling) {
+ if (!(child->path.type == DEVICE_PATH_PCI_DOMAIN))
+ continue;
+ for (res = child->resource_list; res; res = res->next) {
+ if (res->flags & IORESOURCE_FIXED)
+ continue;
+ if (res->flags & IORESOURCE_PREFETCH) {
+ allocate_resources(child->link_list,
+ res, MEM_MASK, PREF_TYPE);
+ continue;
+ }
+ if (res->flags & IORESOURCE_MEM) {
+ allocate_resources(child->link_list,
+ res, MEM_MASK, MEM_TYPE);
+ continue;
+ }
+ if (res->flags & IORESOURCE_IO) {
+ allocate_resources(child->link_list,
+ res, IO_MASK, IO_TYPE);
+ continue;
+ }
+ }
+ }
+ assign_resources(root->link_list);
+ printk(BIOS_INFO, "Done setting resources.\n");
+ print_resource_tree(root, BIOS_SPEW, "After assigning values.");
- printk_info("Done allocating resources.\n");
+ printk(BIOS_INFO, "Done allocating resources.\n");
}
/**
- * @brief Enable devices on the device tree.
+ * Enable devices on the device tree.
*
* Starting at the root, walk the tree and enable all devices/bridges by
* calling the device's enable_resources() method.
*/
void dev_enable(void)
{
- printk_info("Enabling resourcess...\n");
+ struct bus *link;
+
+ printk(BIOS_INFO, "Enabling resources...\n");
- /* now enable everything. */
- enable_resources(&dev_root);
+ /* Now enable everything. */
+ for (link = dev_root.link_list; link; link = link->next)
+ enable_resources(link);
- printk_info("done.\n");
+ printk(BIOS_INFO, "done.\n");
}
/**
- * @brief Initialize all devices in the global device list.
+ * Initialize a specific device.
*
- * Starting at the first device on the global device link list,
- * walk the list and call the device's init() method to do deivce
- * specific setup.
+ * 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.
*/
-void dev_initialize(void)
+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);
+ }
+}
+
+static void init_link(struct bus *link)
{
struct device *dev;
+ struct bus *c_link;
- printk_info("Initializing devices...\n");
-
- for (dev = all_devices; dev; dev = dev->next) {
- if (dev->enabled && !dev->initialized &&
- dev->ops && dev->ops->init)
- {
- if(dev->path.type == DEVICE_PATH_I2C)
- printk_debug("smbus: %s[%d]->", dev_path(dev->bus->dev), dev->bus->link );
- printk_debug("%s init\n", dev_path(dev));
- dev->initialized = 1;
- dev->ops->init(dev);
- }
- }
- printk_info("Devices initialized\n");
+ for (dev = link->children; dev; dev = dev->sibling)
+ init_dev(dev);
+
+ for (dev = link->children; dev; dev = dev->sibling) {
+ for (c_link = dev->link_list; c_link; c_link = c_link->next)
+ init_link(c_link);
+ }
}
+/**
+ * Initialize all devices in the global device tree.
+ *
+ * Starting at the root device, call the device's init() method to do
+ * device-specific setup, then call each child's init() method.
+ */
+void dev_initialize(void)
+{
+ struct bus *link;
+
+ printk(BIOS_INFO, "Initializing devices...\n");
+
+#if CONFIG_ARCH_X86
+ /* Ensure EBDA is prepared before Option ROMs. */
+ setup_default_ebda();
+#endif
+
+ /* First call the mainboard init. */
+ init_dev(&dev_root);
+
+ /* Now initialize everything. */
+ for (link = dev_root.link_list; link; link = link->next)
+ init_link(link);
+
+ printk(BIOS_INFO, "Devices initialized\n");
+ show_all_devs(BIOS_SPEW, "After init.");
+}
projects / coreboot.git / blobdiff