path: root/arch/powerpc/kernel/pci-common.c

/*
 * Contains common pci routines for ALL ppc platform
 * (based on pci_32.c and pci_64.c)
 *
 * Port for PPC64 David Engebretsen, IBM Corp.
 * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
 *
 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
 *   Rework, based on alpha PCI code.
 *
 * Common pmac/prep/chrp pci routines. -- Cort
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#undef DEBUG

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/mm.h>
#include <linux/list.h>
#include <linux/syscalls.h>
#include <linux/irq.h>
#include <linux/vmalloc.h>

#include <asm/processor.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/byteorder.h>
#include <asm/machdep.h>
#include <asm/ppc-pci.h>
#include <asm/firmware.h>

#ifdef DEBUG
#include <asm/udbg.h>
#define DBG(fmt...) printk(fmt)
#else
#define DBG(fmt...)
#endif

static DEFINE_SPINLOCK(hose_spinlock);

/* XXX kill that some day ... */
static int global_phb_number;		/* Global phb counter */

/* ISA Memory physical address */
resource_size_t isa_mem_base;

/* Default PCI flags is 0 */
unsigned int ppc_pci_flags;

struct pci_controller *pcibios_alloc_controller(struct device_node *dev)
{
	struct pci_controller *phb;

	phb = zalloc_maybe_bootmem(sizeof(struct pci_controller), GFP_KERNEL);
	if (phb == NULL)
		return NULL;
	spin_lock(&hose_spinlock);
	phb->global_number = global_phb_number++;
	list_add_tail(&phb->list_node, &hose_list);
	spin_unlock(&hose_spinlock);
	phb->dn = dev;
	phb->is_dynamic = mem_init_done;
#ifdef CONFIG_PPC64
	if (dev) {
		int nid = of_node_to_nid(dev);

		if (nid < 0 || !node_online(nid))
			nid = -1;

		PHB_SET_NODE(phb, nid);
	}
#endif
	return phb;
}

void pcibios_free_controller(struct pci_controller *phb)
{
	spin_lock(&hose_spinlock);
	list_del(&phb->list_node);
	spin_unlock(&hose_spinlock);

	if (phb->is_dynamic)
		kfree(phb);
}

int pcibios_vaddr_is_ioport(void __iomem *address)
{
	int ret = 0;
	struct pci_controller *hose;
	unsigned long size;

	spin_lock(&hose_spinlock);
	list_for_each_entry(hose, &hose_list, list_node) {
#ifdef CONFIG_PPC64
		size = hose->pci_io_size;
#else
		size = hose->io_resource.end - hose->io_resource.start + 1;
#endif
		if (address >= hose->io_base_virt &&
		    address < (hose->io_base_virt + size)) {
			ret = 1;
			break;
		}
	}
	spin_unlock(&hose_spinlock);
	return ret;
}

/*
 * Return the domain number for this bus.
 */
int pci_domain_nr(struct pci_bus *bus)
{
	struct pci_controller *hose = pci_bus_to_host(bus);

	return hose->global_number;
}
EXPORT_SYMBOL(pci_domain_nr);

#ifdef CONFIG_PPC_OF

/* This routine is meant to be used early during boot, when the
 * PCI bus numbers have not yet been assigned, and you need to
 * issue PCI config cycles to an OF device.
 * It could also be used to "fix" RTAS config cycles if you want
 * to set pci_assign_all_buses to 1 and still use RTAS for PCI
 * config cycles.
 */
struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node)
{
	if (!have_of)
		return NULL;
	while(node) {
		struct pci_controller *hose, *tmp;
		list_for_each_entry_safe