static void pcibios_setup_phb_resources()

in pci/pci-common.c [894:954]

• 47 lines of code
• 5 McCabe index (conditional complexity)

static void pcibios_setup_phb_resources(struct pci_controller *hose,
					struct list_head *resources)
{
	unsigned long io_offset;
	struct resource *res;
	int i;

	/* Hookup PHB IO resource */
	res = &hose->io_resource;

	/* Fixup IO space offset */
	io_offset = (unsigned long)hose->io_base_virt - isa_io_base;
	res->start = (res->start + io_offset) & 0xffffffffu;
	res->end = (res->end + io_offset) & 0xffffffffu;

	if (!res->flags) {
		pr_warn("PCI: I/O resource not set for host ");
		pr_cont("bridge %pOF (domain %d)\n",
			hose->dn, hose->global_number);
		/* Workaround for lack of IO resource only on 32-bit */
		res->start = (unsigned long)hose->io_base_virt - isa_io_base;
		res->end = res->start + IO_SPACE_LIMIT;
		res->flags = IORESOURCE_IO;
	}
	pci_add_resource_offset(resources, res,
		(__force resource_size_t)(hose->io_base_virt - _IO_BASE));

	pr_debug("PCI: PHB IO resource    = %016llx-%016llx [%lx]\n",
		 (unsigned long long)res->start,
		 (unsigned long long)res->end,
		 (unsigned long)res->flags);

	/* Hookup PHB Memory resources */
	for (i = 0; i < 3; ++i) {
		res = &hose->mem_resources[i];
		if (!res->flags) {
			if (i > 0)
				continue;
			pr_err("PCI: Memory resource 0 not set for ");
			pr_cont("host bridge %pOF (domain %d)\n",
				hose->dn, hose->global_number);

			/* Workaround for lack of MEM resource only on 32-bit */
			res->start = hose->pci_mem_offset;
			res->end = (resource_size_t)-1LL;
			res->flags = IORESOURCE_MEM;

		}
		pci_add_resource_offset(resources, res, hose->pci_mem_offset);

		pr_debug("PCI: PHB MEM resource %d = %016llx-%016llx [%lx]\n",
			i, (unsigned long long)res->start,
			(unsigned long long)res->end,
			(unsigned long)res->flags);
	}

	pr_debug("PCI: PHB MEM offset     = %016llx\n",
		 (unsigned long long)hose->pci_mem_offset);
	pr_debug("PCI: PHB IO  offset     = %08lx\n",
		 (unsigned long)hose->io_base_virt - _IO_BASE);
}