Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[pandora-kernel.git] / arch / x86 / pci / bus_numa.c
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
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
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 }