release/src-rt-6.x/linux/linux-2.6/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/mm.h>
  17 #include <asm/scatterlist.h>
  18 #include <asm-generic/pci-dma-compat.h>
  19 #include <asm-generic/pci.h>
  20
  21 struct pci_dev;
  22
  23 #define pcibios_assign_all_busses()     0
  24
  25 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
  26 {
  27 }
  28
  29 extern void pcibios_set_master(struct pci_dev *dev);
  30
  31 extern void pcibios_penalize_isa_irq(int irq);
  32
  33 #ifdef CONFIG_MMU
  34 extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
  35 extern void consistent_free(void *vaddr);
  36 extern void consistent_sync(void *vaddr, size_t size, int direction);
  37 extern void consistent_sync_page(struct page *page, unsigned long offset,
  38                                  size_t size, int direction);
  39 #endif
  40
  41 extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
  42                                   dma_addr_t *dma_handle);
  43
  44 extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
  45                                 void *vaddr, dma_addr_t dma_handle);
  46
  47 /* This is always fine. */
  48 #define pci_dac_dma_supported(pci_dev, mask)    (1)
  49
  50 /* Return the index of the PCI controller for device PDEV. */
  51 #define pci_controller_num(PDEV)        (0)
  52
  53 /* The PCI address space does equal the physical memory
  54  * address space.  The networking and block device layers use
  55  * this boolean for bounce buffer decisions.
  56  */
  57 #define PCI_DMA_BUS_IS_PHYS     (1)
  58
  59 /* pci_unmap_{page,single} is a nop so... */
  60 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  61 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  62 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  63 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  64 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  65 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  66
  67 #ifdef CONFIG_PCI
  68 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  69                                         enum pci_dma_burst_strategy *strat,
  70                                         unsigned long *strategy_parameter)
  71 {
  72         *strat = PCI_DMA_BURST_INFINITY;
  73         *strategy_parameter = ~0UL;
  74 }
  75 #endif
  76
  77 /*
  78  *      These are pretty much arbitary with the CoMEM implementation.
  79  *      We have the whole address space to ourselves.
  80  */
  81 #define PCIBIOS_MIN_IO          0x100
  82 #define PCIBIOS_MIN_MEM         0x00010000
  83
  84 /* Make physical memory consistent for a single
  85  * streaming mode DMA translation after a transfer.
  86  *
  87  * If you perform a pci_map_single() but wish to interrogate the
  88  * buffer using the cpu, yet do not wish to teardown the PCI dma
  89  * mapping, you must call this function before doing so.  At the
  90  * next point you give the PCI dma address back to the card, the
  91  * device again owns the buffer.
  92  */
  93 static inline void pci_dma_sync_single(struct pci_dev *hwdev,
  94                                        dma_addr_t dma_handle,
  95                                        size_t size, int direction)
  96 {
  97         if (direction == PCI_DMA_NONE)
  98                 BUG();
  99
 100         frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
 101                             (unsigned long)bus_to_virt(dma_handle) + size);
 102 }
 103
 104 /* Make physical memory consistent for a set of streaming
 105  * mode DMA translations after a transfer.
 106  *
 107  * The same as pci_dma_sync_single but for a scatter-gather list,
 108  * same rules and usage.
 109  */
 110 static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
 111                                    struct scatterlist *sg,
 112                                    int nelems, int direction)
 113 {
 114         int i;
 115
 116         if (direction == PCI_DMA_NONE)
 117                 BUG();
 118
 119         for (i = 0; i < nelems; i++)
 120                 frv_cache_wback_inv(sg_dma_address(&sg[i]),
 121                                     sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
 122 }
 123
 124
 125 #endif