72bdee79f8
The whole business with re-assigning all bus numbers, creating an OF bus "map" etc... is ancient powermac stuff that you really don't care about on microblaze. Similarly pci_device_from_OF_node() is unused and by getting rid of it we can get rid of a whole lot of code otherwise unused on this architecture Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
/*
|
|
* Common pmac/prep/chrp pci routines. -- Cort
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
#include <linux/capability.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/list.h>
|
|
#include <linux/of.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/io.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/byteorder.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#undef DEBUG
|
|
|
|
unsigned long isa_io_base;
|
|
unsigned long pci_dram_offset;
|
|
static int pci_bus_count;
|
|
|
|
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
|
|
{
|
|
struct pci_controller *hose = bus->sysdata;
|
|
|
|
return of_node_get(hose->dn);
|
|
}
|
|
|
|
static void __devinit pcibios_scan_phb(struct pci_controller *hose)
|
|
{
|
|
struct pci_bus *bus;
|
|
struct device_node *node = hose->dn;
|
|
unsigned long io_offset;
|
|
struct resource *res = &hose->io_resource;
|
|
|
|
pr_debug("PCI: Scanning PHB %s\n",
|
|
node ? node->full_name : "<NO NAME>");
|
|
|
|
/* Create an empty bus for the toplevel */
|
|
bus = pci_create_bus(hose->parent, hose->first_busno, hose->ops, hose);
|
|
if (bus == NULL) {
|
|
printk(KERN_ERR "Failed to create bus for PCI domain %04x\n",
|
|
hose->global_number);
|
|
return;
|
|
}
|
|
bus->secondary = hose->first_busno;
|
|
hose->bus = bus;
|
|
|
|
/* 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;
|
|
|
|
/* Wire up PHB bus resources */
|
|
pcibios_setup_phb_resources(hose);
|
|
|
|
/* Scan children */
|
|
hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
|
|
}
|
|
|
|
static int __init pcibios_init(void)
|
|
{
|
|
struct pci_controller *hose, *tmp;
|
|
int next_busno = 0;
|
|
|
|
printk(KERN_INFO "PCI: Probing PCI hardware\n");
|
|
|
|
/* Scan all of the recorded PCI controllers. */
|
|
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
|
|
hose->last_busno = 0xff;
|
|
pcibios_scan_phb(hose);
|
|
printk(KERN_INFO "calling pci_bus_add_devices()\n");
|
|
pci_bus_add_devices(hose->bus);
|
|
if (next_busno <= hose->last_busno)
|
|
next_busno = hose->last_busno + 1;
|
|
}
|
|
pci_bus_count = next_busno;
|
|
|
|
/* Call common code to handle resource allocation */
|
|
pcibios_resource_survey();
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(pcibios_init);
|
|
|
|
static struct pci_controller*
|
|
pci_bus_to_hose(int bus)
|
|
{
|
|
struct pci_controller *hose, *tmp;
|
|
|
|
list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
|
|
if (bus >= hose->first_busno && bus <= hose->last_busno)
|
|
return hose;
|
|
return NULL;
|
|
}
|
|
|
|
/* Provide information on locations of various I/O regions in physical
|
|
* memory. Do this on a per-card basis so that we choose the right
|
|
* root bridge.
|
|
* Note that the returned IO or memory base is a physical address
|
|
*/
|
|
|
|
long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long devfn)
|
|
{
|
|
struct pci_controller *hose;
|
|
long result = -EOPNOTSUPP;
|
|
|
|
hose = pci_bus_to_hose(bus);
|
|
if (!hose)
|
|
return -ENODEV;
|
|
|
|
switch (which) {
|
|
case IOBASE_BRIDGE_NUMBER:
|
|
return (long)hose->first_busno;
|
|
case IOBASE_MEMORY:
|
|
return (long)hose->pci_mem_offset;
|
|
case IOBASE_IO:
|
|
return (long)hose->io_base_phys;
|
|
case IOBASE_ISA_IO:
|
|
return (long)isa_io_base;
|
|
case IOBASE_ISA_MEM:
|
|
return (long)isa_mem_base;
|
|
}
|
|
|
|
return result;
|
|
}
|