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- First pass through with with device tree enhancement merge. Most of the mechanisms should

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be in place but don't expect anything to quite work yet.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1662 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2004-10-14 20:54:17 +00:00
parent cadfd4c462
commit b78c1972fe
52 changed files with 1723 additions and 1778 deletions
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146
src/devices/device.c
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@@ -54,10 +54,9 @@ device_t alloc_dev(struct bus *parent, struct device_path *path)
int link;
/* Find the last child of our parent */
for (child = parent->children; child && child->sibling; ) {
for(child = parent->children; child && child->sibling; ) {
child = child->sibling;
}
dev = malloc(sizeof(*dev));
if (dev == 0) {
die("DEV: out of memory.\n");
@@ -72,19 +71,18 @@ device_t alloc_dev(struct bus *parent, struct device_path *path)
last_dev_p = &dev->next;
/* Initialize the back pointers in the link fields */
for (link = 0; link < MAX_LINKS; link++) {
for(link = 0; link < MAX_LINKS; link++) {
dev->link[link].dev = dev;
dev->link[link].link = link;
}
/* Add the new device as a children of the bus. */
/* Add the new device to the list of children of the bus. */
dev->bus = parent;
if (child) {
child->sibling = dev;
} else {
parent->children = dev;
}
/* If we don't have any other information about a device enable it */
dev->enabled = 1;
@@ -125,7 +123,7 @@ static void read_resources(struct bus *bus)
struct device *curdev;
/* Walk through all of the devices and find which resources they need. */
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
for(curdev = bus->children; curdev; curdev = curdev->sibling) {
unsigned links;
int i;
if (curdev->resources > 0) {
@@ -133,22 +131,20 @@ static void read_resources(struct bus *bus)
}
if (!curdev->ops || !curdev->ops->read_resources) {
printk_err("%s missing read_resources\n",
dev_path(curdev));
dev_path(curdev));
continue;
}
if (!curdev->enabled) {
continue;
}
curdev->ops->read_resources(curdev);
/* Read in subtractive resources behind the current device */
links = 0;
for (i = 0; i < curdev->resources; i++) {
for(i = 0; i < curdev->resources; i++) {
struct resource *resource;
resource = &curdev->resource[i];
if ((resource->flags & IORESOURCE_SUBTRACTIVE) &&
(!(links & (1 << resource->index))))
(!(links & (1 << resource->index))))
{
links |= (1 << resource->index);
read_resources(&curdev->link[resource->index]);
@@ -165,8 +161,8 @@ struct pick_largest_state {
int seen_last;
};
static void pick_largest_resource(struct pick_largest_state *state,
struct device *dev, struct resource *resource)
static void pick_largest_resource(struct pick_largest_state *state,
struct device *dev, struct resource *resource)
{
struct resource *last;
last = state->last;
@@ -175,33 +171,31 @@ static void pick_largest_resource(struct pick_largest_state *state,
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 (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 ||
(state->result->align < resource->align) ||
((state->result->align == resource->align) &&
(state->result->size < resource->size))) {
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 void find_largest_resource(struct pick_largest_state *state,
struct bus *bus, unsigned long type_mask,
unsigned long type)
struct bus *bus, unsigned long type_mask, unsigned long type)
{
struct device *curdev;
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
for(curdev = bus->children; curdev; curdev = curdev->sibling) {
int i;
for (i = 0; i < curdev->resources; i++) {
for(i = 0; i < curdev->resources; i++) {
struct resource *resource = &curdev->resource[i];
/* If it isn't the right kind of resource ignore it */
if ((resource->flags & type_mask) != type) {
@@ -211,8 +205,7 @@ static void find_largest_resource(struct pick_largest_state *state,
if (resource->flags & IORESOURCE_SUBTRACTIVE) {
struct bus *subbus;
subbus = &curdev->link[resource->index];
find_largest_resource(state, subbus,
type_mask, type);
find_largest_resource(state, subbus, type_mask, type);
continue;
}
/* See if this is the largest resource */
@@ -281,12 +274,12 @@ void compute_allocate_resource(
min_align = 0;
base = bridge->base;
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_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);
/* We want different minimum alignments for different kinds of
* resources. These minimums are not device type specific
@@ -305,9 +298,10 @@ void compute_allocate_resource(
/* Remember I haven't found anything yet. */
resource = 0;
/* Walk through all the devices on the current bus and compute the
* addresses */
while ((dev = largest_resource(bus, &resource, type_mask, type))) {
/* Walk through all the devices on the current bus and
* compute the addresses.
*/
while((dev = largest_resource(bus, &resource, type_mask, type))) {
unsigned long 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
@@ -355,12 +349,13 @@ void compute_allocate_resource(
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");
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");
}
}
/* A pci bridge resource does not need to be a power
@@ -372,10 +367,10 @@ void compute_allocate_resource(
bridge->size = round(base, 1UL << bridge->gran) - bridge->base;
printk_spew("%s compute_allocate_%s: base: %08lx size: %08lx align: %d gran: %d done\n",
dev_path(dev),
(bridge->flags & IORESOURCE_IO)? "io":
(bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
base, bridge->size, bridge->align, bridge->gran);
dev_path(dev),
(bridge->flags & IORESOURCE_IO)? "io":
(bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
base, bridge->size, bridge->align, bridge->gran);
}
@@ -386,14 +381,16 @@ static void allocate_vga_resource(void)
#warning "This function knows to much about PCI stuff, it should be just a ietrator/visitor."
/* FIXME handle the VGA pallette snooping */
struct device *dev, *vga = 0;
struct bus *bus = 0;
for (dev = all_devices; dev; dev = dev->next) {
struct device *dev, *vga;
struct bus *bus;
bus = 0;
vga = 0;
for(dev = all_devices; dev; dev = dev->next) {
if (((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) &&
((dev->class >> 8) != PCI_CLASS_DISPLAY_OTHER)) {
if (!vga) {
printk_debug("Allocating VGA resource %s\n", dev_path(dev));
printk_debug("Allocating VGA resource %s\n",
dev_path(dev));
vga = dev;
}
if (vga == dev) {
@@ -408,9 +405,8 @@ static void allocate_vga_resource(void)
if (vga) {
bus = vga->bus;
}
/* Now walk up the bridges setting the VGA enable */
while (bus) {
while(bus) {
bus->bridge_ctrl |= PCI_BRIDGE_CTL_VGA;
bus = (bus == bus->dev->bus)? 0 : bus->dev->bus;
}
@@ -432,7 +428,7 @@ void assign_resources(struct bus *bus)
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
if (!curdev->ops || !curdev->ops->set_resources) {
printk_err("%s missing set_resources\n",
dev_path(curdev));
dev_path(curdev));
continue;
}
if (!curdev->enabled) {
@@ -474,25 +470,26 @@ void enable_resources(struct device *dev)
* @brief Determine the existence of dynamic devices and construct dynamic
* device tree.
*
* Start form the root device 'dev_root', scan the buses in the system
* Start from the root device 'dev_root', scan the buses in the system
* recursively, build the dynamic 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() function also have to create the device structure and attach
* scan_bus() function also has to create the device structure and attach
* it to the device tree.
*/
void dev_enumerate(void)
{
struct device *root;
unsigned subordinate;
printk_info("Enumerating buses...\n");
root = &dev_root;
if (!root->ops || !root->ops->scan_bus) {
printk_err("dev_root missing scan_bus operation");
return;
}
subordinate = root->ops->scan_bus(root, 0);
printk_info("done\n");
}
@@ -510,29 +507,38 @@ void dev_enumerate(void)
*/
void dev_configure(void)
{
struct device *root = &dev_root;
struct device *root;
printk_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;
}
root->ops->read_resources(root);
/* Make certain the io devices are allocated somewhere safe. */
root->resource[0].base = DEVICE_IO_START;
root->resource[0].flags |= IORESOURCE_ASSIGNED;
root->resource[0].flags &= ~IORESOURCE_STORED;
/* Now reallocate the pci resources memory with the highest
* addresses I can manage.*/
/* Now reallocate the pci resources memory with the
* highest addresses I can manage.
*/
root->resource[1].base =
round_down(DEVICE_MEM_HIGH - root->resource[1].size,
1UL << root->resource[1].align);
1UL << root->resource[1].align);
root->resource[1].flags |= IORESOURCE_ASSIGNED;
root->resource[1].flags &= ~IORESOURCE_STORED;
/* Allocate the VGA I/O resource.. */
allocate_vga_resource();
/* now just set things into registers ... we hope ... */
/* Store the computed resource allocations into device registers ... */
root->ops->set_resources(root);
printk_info("done.\n");
@@ -565,13 +571,11 @@ void dev_initialize(void)
struct device *dev;
printk_info("Initializing devices...\n");
for (dev = all_devices; dev; dev = dev->next) {
if (dev->enabled && dev->ops && dev->ops->init) {
printk_debug("%s init\n", dev_path(dev));
dev->ops->init(dev);
}
}
printk_info("Devices initialized\n");
}