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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
View File

@@ -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");
}
/**

33
src/devices/pci_device.c
View File

@@ -117,7 +117,7 @@ struct resource *pci_get_resource(struct device *dev, unsigned long index)
/* If it is a 64bit resource look at the high half as well */
if (((attr & PCI_BASE_ADDRESS_SPACE_IO) == 0) &&
((attr & PCI_BASE_ADDRESS_MEM_LIMIT_MASK) == PCI_BASE_ADDRESS_MEM_LIMIT_64))
((attr & PCI_BASE_ADDRESS_MEM_LIMIT_MASK) == PCI_BASE_ADDRESS_MEM_LIMIT_64))
{
/* Find the high bits that move */
moving |= ((resource_t)pci_moving_config32(dev, index + 4)) << 32;
@@ -611,13 +611,14 @@ static void set_pci_ops(struct device *dev)
* @brief See if we have already allocated a device structure for a given devfn.
*
* Given a linked list of PCI device structures and a devfn number, find the
* device structure correspond to the devfn, if present.
* device structure correspond to the devfn, if present. This function also
* removes the device structure from the linked list.
*
* @param list the device structure list
* @param devfn a device/function number
*
* @return pointer to the device structure found or null of we have not allocated
* a device for this devfn yet.
* @return pointer to the device structure found or null of we have not
* allocated a device for this devfn yet.
*/
static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn)
{
@@ -626,7 +627,7 @@ static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn)
for(; *list; list = &(*list)->sibling) {
if ((*list)->path.type != DEVICE_PATH_PCI) {
printk_err("child %s not a pci device\n",
dev_path(*list));
dev_path(*list));
continue;
}
if ((*list)->path.u.pci.devfn == devfn) {
@@ -637,15 +638,15 @@ static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn)
break;
}
}
/* Just like alloc_dev add the device to the
* list of device on the bus. When the list of devices was formed
* we removed all of the parents children, and now we are interleaving
* static and dynamic devices in order on the bus.
/* Just like alloc_dev add the device to the list of device on the bus.
* When the list of devices was formed we removed all of the parents
* children, and now we are interleaving static and dynamic devices in
* order on the bus.
*/
if (dev) {
device_t child;
/* Find the last child of our parent */
for(child = dev->bus->children; child && child->sibling; ) {
for (child = dev->bus->children; child && child->sibling; ) {
child = child->sibling;
}
/* Place the device on the list of children of it's parent. */
@@ -854,6 +855,8 @@ unsigned int pci_scan_bridge(struct device *dev, unsigned int max)
uint32_t buses;
uint16_t cr;
printk_spew("%s for %s\n", __func__, dev_path(dev));
bus = &dev->link[0];
bus->dev = dev;
dev->links = 1;
@@ -882,15 +885,15 @@ unsigned int pci_scan_bridge(struct device *dev, unsigned int max)
*/
buses &= 0xff000000;
buses |= (((unsigned int) (dev->bus->secondary) << 0) |
((unsigned int) (bus->secondary) << 8) |
((unsigned int) (bus->subordinate) << 16));
((unsigned int) (bus->secondary) << 8) |
((unsigned int) (bus->subordinate) << 16));
pci_write_config32(dev, PCI_PRIMARY_BUS, buses);
/* Now we can scan all subordinate buses
* i.e. the bus behind the bridge.
*/
max = pci_scan_bus(bus, 0x00, 0xff, max);
/* We know the number of buses behind this bridge. Set the subordinate
* bus number to its real value.
*/
@@ -899,7 +902,7 @@ unsigned int pci_scan_bridge(struct device *dev, unsigned int max)
((unsigned int) (bus->subordinate) << 16);
pci_write_config32(dev, PCI_PRIMARY_BUS, buses);
pci_write_config16(dev, PCI_COMMAND, cr);
printk_spew("%s returns max %d\n", __func__, max);
return max;
}

5
src/devices/root_device.c
View File

@@ -89,9 +89,8 @@ unsigned int scan_static_bus(device_t root, unsigned int max)
if (child->ops && child->ops->enable) {
child->ops->enable(child);
}
printk_debug("%s %s\n",
dev_path(child),
child->enabled?"enabled": "disabled");
printk_debug("%s %s\n", dev_path(child),
child->enabled?"enabled": "disabled");
}
}
for (link = 0; link < root->links; link++) {