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 21struct pci_dev; 22 23#define pcibios_assign_all_busses() 0 24 25static inline void pcibios_add_platform_entries(struct pci_dev *dev) 26{ 27} 28 29extern void pcibios_set_master(struct pci_dev *dev); 30 31extern void pcibios_penalize_isa_irq(int irq); 32 33#ifdef CONFIG_MMU 34extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle); 35extern void consistent_free(void *vaddr); 36extern void consistent_sync(void *vaddr, size_t size, int direction); 37extern void consistent_sync_page(struct page *page, unsigned long offset, 38 size_t size, int direction); 39#endif 40 41extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, 42 dma_addr_t *dma_handle); 43 44extern 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 68static 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 */ 93static 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 */ 110static 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 126