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#ifndef __ALPHA_PCI_H
#define __ALPHA_PCI_H

#ifdef __KERNEL__

#include <linux/spinlock.h>
#include <linux/dma-mapping.h>
#include <asm/scatterlist.h>
#include <asm/machvec.h>

 * The following structure is used to manage multiple PCI busses.

struct pci_dev;
struct pci_bus;
struct resource;
struct pci_iommu_arena;
struct page;

/* A controller.  Used to manage multiple PCI busses.  */

struct pci_controller {
      struct pci_controller *next;
        struct pci_bus *bus;
      struct resource *io_space;
      struct resource *mem_space;

      /* The following are for reporting to userland.  The invariant is
         that if we report a BWX-capable dense memory, we do not report
         a sparse memory at all, even if it exists.  */
      unsigned long sparse_mem_base;
      unsigned long dense_mem_base;
      unsigned long sparse_io_base;
      unsigned long dense_io_base;

      /* This one's for the kernel only.  It's in KSEG somewhere.  */
      unsigned long config_space_base;

      unsigned int index;
      /* For compatibility with current (as of July 2003) pciutils
         and XFree86. Eventually will be removed. */
      unsigned int need_domain_info;

      struct pci_iommu_arena *sg_pci;
      struct pci_iommu_arena *sg_isa;

      void *sysdata;

/* Override the logic in pci_scan_bus for skipping already-configured
   bus numbers.  */

#define pcibios_assign_all_busses() 1

#define PCIBIOS_MIN_IO        alpha_mv.min_io_address
#define PCIBIOS_MIN_MEM       alpha_mv.min_mem_address

extern void pcibios_set_master(struct pci_dev *dev);

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

/* IOMMU controls.  */

/* 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


/* implement the pci_ DMA API in terms of the generic device dma_ one */
#include <asm-generic/pci-dma-compat.h>

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;
            cacheline_size = (int) byte * 4;

      *strat = PCI_DMA_BURST_BOUNDARY;
      *strategy_parameter = cacheline_size;

/* TODO: integrate with include/asm-generic/pci.h ? */
static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
      return channel ? 15 : 14;

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

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

#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index

static inline int pci_proc_domain(struct pci_bus *bus)
      struct pci_controller *hose = bus->sysdata;
      return hose->need_domain_info;

#endif /* __KERNEL__ */

/* Values for the `which' argument to sys_pciconfig_iobase.  */
#define IOBASE_HOSE           0
#define IOBASE_SPARSE_MEM     1
#define IOBASE_DENSE_MEM      2
#define IOBASE_SPARSE_IO      3
#define IOBASE_DENSE_IO       4
#define IOBASE_ROOT_BUS       5
#define IOBASE_FROM_HOSE      0x10000

extern struct pci_dev *isa_bridge;

extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
                     size_t count);
extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
                      size_t count);
extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
                              struct vm_area_struct *vma,
                              enum pci_mmap_state mmap_state);
extern void pci_adjust_legacy_attr(struct pci_bus *bus,
                           enum pci_mmap_state mmap_type);

extern int pci_create_resource_files(struct pci_dev *dev);
extern void pci_remove_resource_files(struct pci_dev *dev);

#endif /* __ALPHA_PCI_H */

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