Release 4.7 arch/arm64/kernel/pci.c
/*
* Code borrowed from powerpc/kernel/pci-common.c
*
* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
* Copyright (C) 2014 ARM Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
*/
#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/of_pci.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
/*
* Called after each bus is probed, but before its children are examined
*/
void pcibios_fixup_bus(struct pci_bus *bus)
{
/* nothing to do, expected to be removed in the future */
}
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/*
* We don't have to worry about legacy ISA devices, so nothing to do here
*/
resource_size_t pcibios_align_resource(void *data, const struct resource *res,
resource_size_t size, resource_size_t align)
{
return res->start;
}
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/**
* pcibios_enable_device - Enable I/O and memory.
* @dev: PCI device to be enabled
* @mask: bitmask of BARs to enable
*/
int pcibios_enable_device(struct pci_dev *dev, int mask)
{
if (pci_has_flag(PCI_PROBE_ONLY))
return 0;
return pci_enable_resources(dev, mask);
}
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/*
* Try to assign the IRQ number from DT when adding a new device
*/
int pcibios_add_device(struct pci_dev *dev)
{
dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
return 0;
}
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/*
* raw_pci_read/write - Platform-specific PCI config space access.
*/
int raw_pci_read(unsigned int domain, unsigned int bus,
unsigned int devfn, int reg, int len, u32 *val)
{
return -ENXIO;
}
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int raw_pci_write(unsigned int domain, unsigned int bus,
unsigned int devfn, int reg, int len, u32 val)
{
return -ENXIO;
}
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#ifdef CONFIG_NUMA
int pcibus_to_node(struct pci_bus *bus)
{
return dev_to_node(&bus->dev);
}
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EXPORT_SYMBOL(pcibus_to_node);
#endif
#ifdef CONFIG_ACPI
/* Root bridge scanning */
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
/* TODO: Should be revisited when implementing PCI on ACPI */
return NULL;
}
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#endif
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