1. 根目录:
2. arch
3. sparc
4. include
5. asm
6. pci_64.h

#ifndef __SPARC64_PCI_H
#define __SPARC64_PCI_H

#ifdef __KERNEL__

#include <linux/dma-mapping.h>

/* Can be used to override the logic in pci_scan_bus for skipping
 * already-configured bus numbers - to be used for buggy BIOSes
 * or architectures with incomplete PCI setup by the loader.
 */
#define pcibios_assign_all_busses()	0

#define PCIBIOS_MIN_IO		0UL
#define PCIBIOS_MIN_MEM		0UL

#define PCI_IRQ_NONE		0xffffffff

static inline void pcibios_penalize_isa_irq(int irq, int active)
{
	/* We don't do dynamic PCI IRQ allocation */
}

/* The PCI address space does not equal the physical memory
 * address space.  The networking and block device layers use
 * this boolean for bounce buffer decisions.
 */
#define PCI_DMA_BUS_IS_PHYS	(0)

/* PCI IOMMU mapping bypass support. */

/* PCI 64-bit addressing works for all slots on all controller
 * types on sparc64.  However, it requires that the device
 * can drive enough of the 64 bits.
 */
#define PCI64_REQUIRED_MASK	(~(u64)0)
#define PCI64_ADDR_BASE		0xfffc000000000000UL

#ifdef CONFIG_PCI
static inline void pci_dma_burst_advice(struct pci_dev *pdev,
					enum pci_dma_burst_strategy *strat,
					unsigned long *strategy_parameter)
{
	unsigned long cacheline_size;
	u8 byte;

	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
	if (byte == 0)
		cacheline_size = 1024;
	else
		cacheline_size = (int) byte * 4;

	*strat = PCI_DMA_BURST_BOUNDARY;
	*strategy_parameter = cacheline_size;
}
#endif

/* Return the index of the PCI controller for device PDEV. */

extern int pci_domain_nr(struct pci_bus *bus);
static inline int pci_proc_domain(struct pci_bus *bus)
{
	return 1;
}

/* Platform support for /proc/bus/pci/X/Y mmap()s. */

#define HAVE_PCI_MMAP
#define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
#define get_pci_unmapped_area get_fb_unmapped_area

extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
			       enum pci_mmap_state mmap_state,
			       int write_combine);

extern void
pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
			struct resource *res);

extern void
pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
			struct pci_bus_region *region);

static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
{
	return PCI_IRQ_NONE;
}

#define HAVE_ARCH_PCI_RESOURCE_TO_USER
extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
				 const struct resource *rsrc,
				 resource_size_t *start, resource_size_t *end);
#endif /* __KERNEL__ */

#endif /* __SPARC64_PCI_H */