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