1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/pci.h>
3 #include <linux/init.h>
4 #include <asm/pci_x86.h>
5 #include <asm/x86_init.h>
6 #include <asm/irqdomain.h>
7
8 /* arch_initcall has too random ordering, so call the initializers
9 in the right sequence from here. */
10 static __init int pci_arch_init(void)
11 {
12 int type, pcbios = 1;
13
14 type = pci_direct_probe();
15
16 if (!(pci_probe & PCI_PROBE_NOEARLY))
17 pci_mmcfg_early_init();
18
19 if (x86_init.pci.arch_init)
20 pcbios = x86_init.pci.arch_init();
21
22 /*
23 * Must happen after x86_init.pci.arch_init(). Xen sets up the
24 * x86_init.irqs.create_pci_msi_domain there.
25 */
26 x86_create_pci_msi_domain();
27
28 if (!pcbios)
29 return 0;
30
31 pci_pcbios_init();
32
33 /*
34 * don't check for raw_pci_ops here because we want pcbios as last
35 * fallback, yet it's needed to run first to set pcibios_last_bus
36 * in case legacy PCI probing is used. otherwise detecting peer busses
37 * fails.
38 */
39 pci_direct_init(type);
40
41 if (!raw_pci_ops && !raw_pci_ext_ops)
42 printk(KERN_ERR
43 "PCI: Fatal: No config space access function found\n");
44
45 dmi_check_pciprobe();
46
47 dmi_check_skip_isa_align();
48
49 return 0;
50 }
51 arch_initcall(pci_arch_init);
52
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