dirty fix to merging

1 files changed, 106 insertions, 0 deletions

diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
new file mode 100644
index 00000000..fd3f6551
--- /dev/null
+++ b/arch/x86/pci/bus_numa.c
@@ -0,0 +1,106 @@
+#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++;
+}