tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ASM_SH_PCI_H
2#define __ASM_SH_PCI_H
3
4#ifdef __KERNEL__
5
6#include <linux/dma-mapping.h>
7
8/* Can be used to override the logic in pci_scan_bus for skipping
9 already-configured bus numbers - to be used for buggy BIOSes
10 or architectures with incomplete PCI setup by the loader */
11
12#define pcibios_assign_all_busses() 1
13#define pcibios_scan_all_fns(a, b) 0
14
15/*
16 * A board can define one or more PCI channels that represent built-in (or
17 * external) PCI controllers.
18 */
19struct pci_channel {
20 struct pci_channel *next;
21
22 struct pci_ops *pci_ops;
23 struct resource *io_resource;
24 struct resource *mem_resource;
25
26 unsigned long io_offset;
27 unsigned long mem_offset;
28
29 unsigned long reg_base;
30
31 unsigned long io_map_base;
32};
33
34extern void register_pci_controller(struct pci_channel *hose);
35
36extern unsigned long PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM;
37
38struct pci_dev;
39
40#define HAVE_PCI_MMAP
41extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
42 enum pci_mmap_state mmap_state, int write_combine);
43extern void pcibios_set_master(struct pci_dev *dev);
44
45static inline void pcibios_penalize_isa_irq(int irq, int active)
46{
47 /* We don't do dynamic PCI IRQ allocation */
48}
49
50/* Dynamic DMA mapping stuff.
51 * SuperH has everything mapped statically like x86.
52 */
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#include <linux/types.h>
61#include <linux/slab.h>
62#include <asm/scatterlist.h>
63#include <linux/string.h>
64#include <asm/io.h>
65
66/* pci_unmap_{single,page} being a nop depends upon the
67 * configuration.
68 */
69#ifdef CONFIG_SH_PCIDMA_NONCOHERENT
70#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
71 dma_addr_t ADDR_NAME;
72#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
73 __u32 LEN_NAME;
74#define pci_unmap_addr(PTR, ADDR_NAME) \
75 ((PTR)->ADDR_NAME)
76#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
77 (((PTR)->ADDR_NAME) = (VAL))
78#define pci_unmap_len(PTR, LEN_NAME) \
79 ((PTR)->LEN_NAME)
80#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
81 (((PTR)->LEN_NAME) = (VAL))
82#else
83#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
84#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
85#define pci_unmap_addr(PTR, ADDR_NAME) (0)
86#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
87#define pci_unmap_len(PTR, LEN_NAME) (0)
88#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
89#endif
90
91#ifdef CONFIG_PCI
92/*
93 * None of the SH PCI controllers support MWI, it is always treated as a
94 * direct memory write.
95 */
96#define PCI_DISABLE_MWI
97
98static inline void pci_dma_burst_advice(struct pci_dev *pdev,
99 enum pci_dma_burst_strategy *strat,
100 unsigned long *strategy_parameter)
101{
102 unsigned long cacheline_size;
103 u8 byte;
104
105 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
106
107 if (byte == 0)
108 cacheline_size = L1_CACHE_BYTES;
109 else
110 cacheline_size = byte << 2;
111
112 *strat = PCI_DMA_BURST_MULTIPLE;
113 *strategy_parameter = cacheline_size;
114}
115#endif
116
117#ifdef CONFIG_SUPERH32
118/*
119 * If we're on an SH7751 or SH7780 PCI controller, PCI memory is mapped
120 * at the end of the address space in a special non-translatable area.
121 */
122#define PCI_MEM_FIXED_START 0xfd000000
123#define PCI_MEM_FIXED_END (PCI_MEM_FIXED_START + 0x01000000)
124
125#define is_pci_memory_fixed_range(s, e) \
126 ((s) >= PCI_MEM_FIXED_START && (e) < PCI_MEM_FIXED_END)
127#else
128#define is_pci_memory_fixed_range(s, e) (0)
129#endif
130
131/* Board-specific fixup routines. */
132int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin);
133
134extern void pcibios_resource_to_bus(struct pci_dev *dev,
135 struct pci_bus_region *region, struct resource *res);
136
137extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
138 struct pci_bus_region *region);
139
140/* Chances are this interrupt is wired PC-style ... */
141static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
142{
143 return channel ? 15 : 14;
144}
145
146/* generic DMA-mapping stuff */
147#include <asm-generic/pci-dma-compat.h>
148
149#endif /* __KERNEL__ */
150#endif /* __ASM_SH_PCI_H */
151