| #include <linux/init.h> |
| #include <linux/pci.h> |
| #include <linux/range.h> |
| |
| #include "bus_numa.h" |
| |
| int pci_root_num; |
| struct pci_root_info pci_root_info[PCI_ROOT_NR]; |
| |
| void x86_pci_root_bus_resources(int bus, struct list_head *resources) |
| { |
| int i; |
| int j; |
| struct pci_root_info *info; |
| |
| if (!pci_root_num) |
| goto default_resources; |
| |
| for (i = 0; i < pci_root_num; i++) { |
| if (pci_root_info[i].bus_min == bus) |
| break; |
| } |
| |
| if (i == pci_root_num) |
| goto default_resources; |
| |
| printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n", |
| bus); |
| |
| info = &pci_root_info[i]; |
| for (j = 0; j < info->res_num; j++) { |
| struct resource *res; |
| struct resource *root; |
| |
| res = &info->res[j]; |
| pci_add_resource(resources, res); |
| if (res->flags & IORESOURCE_IO) |
| root = &ioport_resource; |
| else |
| root = &iomem_resource; |
| insert_resource(root, res); |
| } |
| return; |
| |
| default_resources: |
| /* |
| * We don't have any host bridge aperture information from the |
| * "native host bridge drivers," e.g., amd_bus or broadcom_bus, |
| * so fall back to the defaults historically used by pci_create_bus(). |
| */ |
| printk(KERN_DEBUG "PCI: root bus %02x: using default resources\n", bus); |
| pci_add_resource(resources, &ioport_resource); |
| pci_add_resource(resources, &iomem_resource); |
| } |
| |
| void __devinit update_res(struct pci_root_info *info, resource_size_t start, |
| resource_size_t end, unsigned long flags, int merge) |
| { |
| int i; |
| struct resource *res; |
| |
| if (start > end) |
| return; |
| |
| if (start == MAX_RESOURCE) |
| return; |
| |
| if (!merge) |
| goto addit; |
| |
| /* try to merge it with old one */ |
| for (i = 0; i < info->res_num; i++) { |
| resource_size_t final_start, final_end; |
| resource_size_t common_start, common_end; |
| |
| res = &info->res[i]; |
| if (res->flags != flags) |
| continue; |
| |
| common_start = max(res->start, start); |
| common_end = min(res->end, end); |
| if (common_start > common_end + 1) |
| continue; |
| |
| final_start = min(res->start, start); |
| final_end = max(res->end, end); |
| |
| res->start = final_start; |
| res->end = final_end; |
| return; |
| } |
| |
| addit: |
| |
| /* need to add that */ |
| if (info->res_num >= RES_NUM) |
| return; |
| |
| res = &info->res[info->res_num]; |
| res->name = info->name; |
| res->flags = flags; |
| res->start = start; |
| res->end = end; |
| res->child = NULL; |
| info->res_num++; |
| } |