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allocating resource for legacy VGA frame buffer, it is not 100%

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correct but it works anyway.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1811 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Li-Ta Lo
2004-12-03 22:39:34 +00:00
parent 845e8df673
commit 3a81285409
6 changed files with 131 additions and 101 deletions
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72
src/devices/device.c
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@@ -56,10 +56,12 @@ device_t alloc_dev(struct bus *parent, struct device_path *path)
int link;
spin_lock(&dev_lock);
/* 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");
@@ -67,13 +69,12 @@ device_t alloc_dev(struct bus *parent, struct device_path *path)
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++) {
for (link = 0; link < MAX_LINKS; link++) {
dev->link[link].dev = dev;
dev->link[link].link = link;
}
/* By default devices are enabled */
dev->enabled = 1;
@@ -118,10 +119,10 @@ 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);
dev_path(bus->dev), bus->secondary, bus->link);
/* 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->have_resources) {
@@ -139,7 +140,7 @@ static void read_resources(struct bus *bus)
curdev->have_resources = 1;
/* 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;
unsigned link;
resource = &curdev->resource[i];
@@ -148,7 +149,7 @@ static void read_resources(struct bus *bus)
link = IOINDEX_SUBTRACTIVE_LINK(resource->index);
if (link > MAX_LINKS) {
printk_err("%s subtractive index on link: %d\n",
dev_path(curdev), link);
dev_path(curdev), link);
continue;
}
if (!(links & (1 << link))) {
@@ -159,7 +160,7 @@ static void read_resources(struct bus *bus)
}
}
printk_spew("%s read_resources bus %d link: %d done\n",
dev_path(bus->dev), bus->secondary, bus->link);
dev_path(bus->dev), bus->secondary, bus->link);
}
struct pick_largest_state {
@@ -190,9 +191,9 @@ static void pick_largest_resource(void *gp,
return;
}
if (!state->result ||
(state->result->align < resource->align) ||
((state->result->align == resource->align) &&
(state->result->size < resource->size))) {
(state->result->align < resource->align) ||
((state->result->align == resource->align) &&
(state->result->size < resource->size))) {
state->result_dev = dev;
state->result = resource;
}
@@ -257,11 +258,10 @@ void compute_allocate_resource(
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);
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
@@ -283,14 +283,13 @@ void compute_allocate_resource(
/* Walk through all the devices on the current bus and
* compute the addresses.
*/
while((dev = largest_resource(bus, &resource, type_mask, type))) {
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) {
bridge->align = resource->align;
@@ -339,14 +338,13 @@ 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
@@ -358,10 +356,10 @@ void compute_allocate_resource(
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);
dev_path(bus->dev),
(bridge->flags & IORESOURCE_IO)? "io":
(bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
base, bridge->size, bridge->align, bridge->gran);
}
@@ -380,10 +378,6 @@ static void allocate_vga_resource(void)
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("parent of the vga device %s\n",
dev_path(dev->bus->dev));
vga = dev;
}
if (vga == dev) {
@@ -400,8 +394,6 @@ static void allocate_vga_resource(void)
}
/* Now walk up the bridges setting the VGA enable */
while (bus) {
printk_info("Enabling VGA forward on bus connect to %s\n",
dev_path(bus->dev));
bus->bridge_ctrl |= PCI_BRIDGE_CTL_VGA;
bus = (bus == bus->dev->bus)? 0 : bus->dev->bus;
}
@@ -545,7 +537,7 @@ void dev_configure(void)
printk_info("Reading resources...\n");
root->ops->read_resources(root);
printk_info("Done\n");
printk_info("Done reading resources.\n");
/* Get the resources */
io = &root->resource[0];
@@ -567,13 +559,13 @@ void dev_configure(void)
/* Store the computed resource allocations into device registers ... */
printk_info("Setting resources...\n");
root->ops->set_resources(root);
printk_info("Done\n");
printk_info("Done setting resources.\n");
#if 0
mem->flags |= IORESOURCE_STORED;
report_resource_stored(root, mem, "");
#endif
printk_info("done.\n");
printk_info("Done allocating resources.\n");
}
/**