1#include <linux/pci.h>
2#include <linux/kernel.h>
3#include <arch/hwregs/intr_vect.h>
4
5void pcibios_fixup_bus(struct pci_bus *b)
6{
7}
8
9void pcibios_set_master(struct pci_dev *dev)
10{
11	u8 lat;
12	pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
13	printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
14	pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
15}
16
17int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
18			enum pci_mmap_state mmap_state, int write_combine)
19{
20	unsigned long prot;
21
22	/* Leave vm_pgoff as-is, the PCI space address is the physical
23	 * address on this platform.
24	 */
25	prot = pgprot_val(vma->vm_page_prot);
26	vma->vm_page_prot = __pgprot(prot);
27
28	/* Write-combine setting is ignored, it is changed via the mtrr
29	 * interfaces on this platform.
30	 */
31	if (remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
32			     vma->vm_end - vma->vm_start,
33			     vma->vm_page_prot))
34		return -EAGAIN;
35
36	return 0;
37}
38
39resource_size_t
40pcibios_align_resource(void *data, const struct resource *res,
41		       resource_size_t size, resource_size_t align)
42{
43	resource_size_t start = res->start;
44
45	if ((res->flags & IORESOURCE_IO) && (start & 0x300))
46		start = (start + 0x3ff) & ~0x3ff;
47
48	return start;
49}
50
51int pcibios_enable_resources(struct pci_dev *dev, int mask)
52{
53	u16 cmd, old_cmd;
54	int idx;
55	struct resource *r;
56
57	pci_read_config_word(dev, PCI_COMMAND, &cmd);
58	old_cmd = cmd;
59	for(idx=0; idx<6; idx++) {
60		/* Only set up the requested stuff */
61		if (!(mask & (1<<idx)))
62			continue;
63
64		r = &dev->resource[idx];
65		if (!r->start && r->end) {
66			printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
67			return -EINVAL;
68		}
69		if (r->flags & IORESOURCE_IO)
70			cmd |= PCI_COMMAND_IO;
71		if (r->flags & IORESOURCE_MEM)
72			cmd |= PCI_COMMAND_MEMORY;
73	}
74	if (dev->resource[PCI_ROM_RESOURCE].start)
75		cmd |= PCI_COMMAND_MEMORY;
76	if (cmd != old_cmd) {
77		printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
78		pci_write_config_word(dev, PCI_COMMAND, cmd);
79	}
80	return 0;
81}
82
83int pcibios_enable_irq(struct pci_dev *dev)
84{
85	dev->irq = EXT_INTR_VECT;
86	return 0;
87}
88
89int pcibios_enable_device(struct pci_dev *dev, int mask)
90{
91	int err;
92
93	if ((err = pcibios_enable_resources(dev, mask)) < 0)
94		return err;
95
96	if (!dev->msi_enabled)
97		pcibios_enable_irq(dev);
98	return 0;
99}
100