1 #include <linux/init.h>
2 #include <linux/pci.h>
3 #include <linux/range.h>
4
5 #include "bus_numa.h"
6
7 int pci_root_num;
8 struct pci_root_info pci_root_info[PCI_ROOT_NR];
9
x86_pci_root_bus_resources(int bus,struct list_head * resources)10 void x86_pci_root_bus_resources(int bus, struct list_head *resources)
11 {
12 int i;
13 int j;
14 struct pci_root_info *info;
15
16 if (!pci_root_num)
17 goto default_resources;
18
19 for (i = 0; i < pci_root_num; i++) {
20 if (pci_root_info[i].bus_min == bus)
21 break;
22 }
23
24 if (i == pci_root_num)
25 goto default_resources;
26
27 printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
28 bus);
29
30 info = &pci_root_info[i];
31 for (j = 0; j < info->res_num; j++) {
32 struct resource *res;
33 struct resource *root;
34
35 res = &info->res[j];
36 pci_add_resource(resources, res);
37 if (res->flags & IORESOURCE_IO)
38 root = &ioport_resource;
39 else
40 root = &iomem_resource;
41 insert_resource(root, res);
42 }
43 return;
44
45 default_resources:
46 /*
47 * We don't have any host bridge aperture information from the
48 * "native host bridge drivers," e.g., amd_bus or broadcom_bus,
49 * so fall back to the defaults historically used by pci_create_bus().
50 */
51 printk(KERN_DEBUG "PCI: root bus %02x: using default resources\n", bus);
52 pci_add_resource(resources, &ioport_resource);
53 pci_add_resource(resources, &iomem_resource);
54 }
55
update_res(struct pci_root_info * info,resource_size_t start,resource_size_t end,unsigned long flags,int merge)56 void __devinit update_res(struct pci_root_info *info, resource_size_t start,
57 resource_size_t end, unsigned long flags, int merge)
58 {
59 int i;
60 struct resource *res;
61
62 if (start > end)
63 return;
64
65 if (start == MAX_RESOURCE)
66 return;
67
68 if (!merge)
69 goto addit;
70
71 /* try to merge it with old one */
72 for (i = 0; i < info->res_num; i++) {
73 resource_size_t final_start, final_end;
74 resource_size_t common_start, common_end;
75
76 res = &info->res[i];
77 if (res->flags != flags)
78 continue;
79
80 common_start = max(res->start, start);
81 common_end = min(res->end, end);
82 if (common_start > common_end + 1)
83 continue;
84
85 final_start = min(res->start, start);
86 final_end = max(res->end, end);
87
88 res->start = final_start;
89 res->end = final_end;
90 return;
91 }
92
93 addit:
94
95 /* need to add that */
96 if (info->res_num >= RES_NUM)
97 return;
98
99 res = &info->res[info->res_num];
100 res->name = info->name;
101 res->flags = flags;
102 res->start = start;
103 res->end = end;
104 res->child = NULL;
105 info->res_num++;
106 }
107