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code reformat, doxidization 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1549 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Li-Ta Lo 2004-05-07 21:52:47 +00:00
parent 3bb314725a
commit fb4c50f695
2 changed files with 28 additions and 9 deletions
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35
src/devices/root_device.c
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@ -61,17 +61,27 @@ void root_dev_set_resources(device_t root)
} }
/** /**
* Walk through devices on the motherboard and scan for devices behind * @brief Scan devices on static buses.
* them. *
* The existence of devices on certain buses can be completely determined at
* compile time by the config file. Typical expamles are the 'PNP' devices
* on an legacy ISA/LPC bus. There is no need of probing of any kind, the
* only thing we have to do is to walk through the bus and enable or disable
* devices as indicated in the config file.
*
* This function is the default scan_bus() method for LPC bridges.
*
* @param root Pointer to the device structure for the system root device * @param root Pointer to the device structure for the system root device
* @param max Maximum bus number allowed in the system. * @param max Maximum bus number allowed in the system.
* @return Largest bus number used. * @return Largest bus number used.
*/ */
unsigned int walk_static_devices(device_t bus, unsigned int max) unsigned int scan_static_bus(device_t bus, unsigned int max)
{ {
device_t child; device_t child;
unsigned link; unsigned link;
printk_debug("%s entered\n", __FUNCTION__);
for (link = 0; link < bus->links; link++) { for (link = 0; link < bus->links; link++) {
for (child = bus->link[link].children; child; child = child->sibling) { for (child = bus->link[link].children; child; child = child->sibling) {
if (child->ops && child->ops->enable) { if (child->ops && child->ops->enable) {
@ -89,15 +99,18 @@ unsigned int walk_static_devices(device_t bus, unsigned int max)
max = child->ops->scan_bus(child, max); max = child->ops->scan_bus(child, max);
} }
} }
printk_debug("%s done\n", __FUNCTION__);
return max; return max;
} }
/** /**
* @brief Enable resources for children devices * @brief Enable resources for children devices
* *
* @param dev the device whos childrens resources are to be enabled * @param dev the device whos children's resources are to be enabled
* *
* This function is call by the enable_resource * This function is call by the enable_resource()
*/ */
void enable_childrens_resources(device_t dev) void enable_childrens_resources(device_t dev)
{ {
@ -113,9 +126,13 @@ void enable_childrens_resources(device_t dev)
/** /**
* @brief Scan root bus for generic PCI systems * @brief Scan root bus for generic PCI systems
* *
* @param root the root device structure * @param root The root device structure
* @param max the current bus number scanned so fat, usually 0x00 * @param max The current bus number scanned so fat, usually 0x00
* *
* This function is the default scan_bus() method of the dynamic root device.
* The bus heirachy is rooted at the host/northbridge. The northbridge of a
* generic PCI bus system is at Bus 0, Dev 0, Fun 0 so we scan the whole PCI
* buses from there.
*/ */
unsigned int root_dev_scan_pci_bus(device_t root, unsigned int max) unsigned int root_dev_scan_pci_bus(device_t root, unsigned int max)
{ {
@ -141,7 +158,9 @@ struct device_operations default_dev_ops_root = {
}; };
/** /**
* This is the root of the device tree. A PCI tree always has * @brief The root of dynamic device tree.
*
* This is the root of the dynamic device tree. A PCI tree always has
* one bus, bus 0. Bus 0 contains devices and bridges. * one bus, bus 0. Bus 0 contains devices and bridges.
*/ */
struct device dev_root = { struct device dev_root = {