root/include/asm-frv/pci.h

INCLUDED FROM

DEFINITIONS

1. pci_dma_burst_advice
2. pci_dma_sync_single
3. pci_dma_sync_sg

/* pci.h: FR-V specific PCI declarations
 *
 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 * - Derived from include/asm-m68k/pci.h
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef ASM_PCI_H
#define ASM_PCI_H

#include <linux/mm.h>
#include <asm/scatterlist.h>
#include <asm-generic/pci-dma-compat.h>
#include <asm-generic/pci.h>

struct pci_dev;

#define pcibios_assign_all_busses()     0

extern void pcibios_set_master(struct pci_dev *dev);

extern void pcibios_penalize_isa_irq(int irq);

#ifdef CONFIG_MMU
extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
extern void consistent_free(void *vaddr);
extern void consistent_sync(void *vaddr, size_t size, int direction);
extern void consistent_sync_page(struct page *page, unsigned long offset,
                                 size_t size, int direction);
#endif

extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size,
                                  dma_addr_t *dma_handle);

extern void pci_free_consistent(struct pci_dev *hwdev, size_t size,
                                void *vaddr, dma_addr_t dma_handle);

/* Return the index of the PCI controller for device PDEV. */
#define pci_controller_num(PDEV)        (0)

/* The PCI address space does 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     (1)

/* pci_unmap_{page,single} is a nop so... */
#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
#define pci_unmap_addr(PTR, ADDR_NAME)          (0)
#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
#define pci_unmap_len(PTR, LEN_NAME)            (0)
#define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)

#ifdef CONFIG_PCI
static inline void pci_dma_burst_advice(struct pci_dev *pdev,
                                        enum pci_dma_burst_strategy *strat,
                                        unsigned long *strategy_parameter)
{
        *strat = PCI_DMA_BURST_INFINITY;
        *strategy_parameter = ~0UL;
}
#endif

/*
 *      These are pretty much arbitary with the CoMEM implementation.
 *      We have the whole address space to ourselves.
 */
#define PCIBIOS_MIN_IO          0x100
#define PCIBIOS_MIN_MEM         0x00010000

/* Make physical memory consistent for a single
 * streaming mode DMA translation after a transfer.
 *
 * If you perform a pci_map_single() but wish to interrogate the
 * buffer using the cpu, yet do not wish to teardown the PCI dma
 * mapping, you must call this function before doing so.  At the
 * next point you give the PCI dma address back to the card, the
 * device again owns the buffer.
 */
static inline void pci_dma_sync_single(struct pci_dev *hwdev,
                                       dma_addr_t dma_handle,
                                       size_t size, int direction)
{
        if (direction == PCI_DMA_NONE)
                BUG();

        frv_cache_wback_inv((unsigned long)bus_to_virt(dma_handle),
                            (unsigned long)bus_to_virt(dma_handle) + size);
}

/* Make physical memory consistent for a set of streaming
 * mode DMA translations after a transfer.
 *
 * The same as pci_dma_sync_single but for a scatter-gather list,
 * same rules and usage.
 */
static inline void pci_dma_sync_sg(struct pci_dev *hwdev,
                                   struct scatterlist *sg,
                                   int nelems, int direction)
{
        int i;

        if (direction == PCI_DMA_NONE)
                BUG();

        for (i = 0; i < nelems; i++)
                frv_cache_wback_inv(sg_dma_address(&sg[i]),
                                    sg_dma_address(&sg[i])+sg_dma_len(&sg[i]));
}


#endif