LXR linux-bk/include/asm-frv/pci.h

   1/* pci.h: FR-V specific PCI declarations
   2 *
   3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 * - Derived from include/asm-m68k/pci.h
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License
   9 * as published by the Free Software Foundation; either version
  10 * 2 of the License, or (at your option) any later version.
  11 */
  12
  13#ifndef ASM_PCI_H
  14#define ASM_PCI_H
  15
  16#include <linux/config.h>
  17#include <linux/mm.h>
  18#include <asm/scatterlist.h>
  19#include <asm-generic/pci-dma-compat.h>
  20#include <asm-generic/pci.h>
  21
  22struct pci_dev;
  23
  24#define pcibios_assign_all_busses()     0
  25
  26static inline void pcibios_add_platform_entries(struct pci_dev *dev)
  27{
  28}
  29
  30extern void pcibios_set_master(struct pci_dev *dev);
  31
  32extern void pcibios_penalize_isa_irq(int irq);
  33
  34#ifdef CONFIG_MMU
  35extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *dma_handle);
  36extern void consistent_free(void *vaddr);
  37extern void consistent_sync(void *vaddr, size_t size, int direction);
  38extern void consistent_sync_page(struct page *page, unsigned long offset,
  39                                 size_t size, int direction);
  40#endif
  41
  42extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
  43                                  dma_addr_t *dma_handle);
  44
  45extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
  46                                void *vaddr, dma_addr_t dma_handle);
  47
  48/* This is always fine. */
  49#define pci_dac_dma_supported(pci_dev, mask)    (1)
  50
  51/* Return the index of the PCI controller for device PDEV. */
  52#define pci_controller_num(PDEV)        (0)
  53
  54/* The PCI address space does equal the physical memory
  55 * address space.  The networking and block device layers use
  56 * this boolean for bounce buffer decisions.
  57 */
  58#define PCI_DMA_BUS_IS_PHYS     (1)
  59
  60/*
  61 *      These are pretty much arbitary with the CoMEM implementation.
  62 *      We have the whole address space to ourselves.
  63 */
  64#define PCIBIOS_MIN_IO          0x100
  65#define PCIBIOS_MIN_MEM         0x00010000
  66
  67/* Make physical memory consistent for a single
  68 * streaming mode DMA translation after a transfer.
  69 *
  70 * If you perform a pci_map_single() but wish to interrogate the
  71 * buffer using the cpu, yet do not wish to teardown the PCI dma
  72 * mapping, you must call this function before doing so.  At the
  73 * next point you give the PCI dma address back to the card, the
  74 * device again owns the buffer.
  75 */
  76static inline void pci_dma_sync_single(struct pci_dev *hwdev,
  77                                       dma_addr_t dma_handle,
  78                                       size_t size, int direction)
  79{
  80        if (direction == PCI_DMA_NONE)
  81                BUG();
  82
  83        frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
  84                            (unsigned long)bus_to_virt(dma_handle) + size);
  85}
  86
  87/* Make physical memory consistent for a set of streaming
  88 * mode DMA translations after a transfer.
  89 *
  90 * The same as pci_dma_sync_single but for a scatter-gather list,
  91 * same rules and usage.
  92 */
  93static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
  94                                   struct scatterlist *sg,
  95                                   int nelems, int direction)
  96{
  97        int i;
  98
  99        if (direction == PCI_DMA_NONE)
 100                BUG();
 101
 102        for (i = 0; i < nelems; i++)
 103                frv_cache_wback_inv(sg_dma_address(&sg[i]),
 104                                    sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
 105}
 106
 107
 108#endif
 109