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_ops *pci_ops;
21 struct resource *io_resource;
22 struct resource *mem_resource;
23 int first_devfn;
24 int last_devfn;
25};
26
27/*
28 * Each board initializes this array and terminates it with a NULL entry.
29 */
30extern struct pci_channel board_pci_channels[];
31
32#define PCIBIOS_MIN_IO board_pci_channels->io_resource->start
33#define PCIBIOS_MIN_MEM board_pci_channels->mem_resource->start
34
35/*
36 * I/O routine helpers
37 */
38#if defined(CONFIG_CPU_SUBTYPE_SH7780) || defined(CONFIG_CPU_SUBTYPE_SH7785)
39#define PCI_IO_AREA 0xFE400000
40#define PCI_IO_SIZE 0x00400000
41#elif defined(CONFIG_CPU_SH5)
42extern unsigned long PCI_IO_AREA;
43#define PCI_IO_SIZE 0x00010000
44#else
45#define PCI_IO_AREA 0xFE240000
46#define PCI_IO_SIZE 0x00040000
47#endif
48
49#define PCI_MEM_SIZE 0x01000000
50
51#define SH4_PCIIOBR_MASK 0xFFFC0000
52#define pci_ioaddr(addr) (PCI_IO_AREA + (addr & ~SH4_PCIIOBR_MASK))
53
54#if defined(CONFIG_PCI)
55#define is_pci_ioaddr(port) \
56 (((port) >= PCIBIOS_MIN_IO) && \
57 ((port) < (PCIBIOS_MIN_IO + PCI_IO_SIZE)))
58#define is_pci_memaddr(port) \
59 (((port) >= PCIBIOS_MIN_MEM) && \
60 ((port) < (PCIBIOS_MIN_MEM + PCI_MEM_SIZE)))
61#else
62#define is_pci_ioaddr(port) (0)
63#define is_pci_memaddr(port) (0)
64#endif
65
66struct pci_dev;
67
68extern void pcibios_set_master(struct pci_dev *dev);
69
70static inline void pcibios_penalize_isa_irq(int irq, int active)
71{
72 /* We don't do dynamic PCI IRQ allocation */
73}
74
75/* Dynamic DMA mapping stuff.
76 * SuperH has everything mapped statically like x86.
77 */
78
79/* The PCI address space does equal the physical memory
80 * address space. The networking and block device layers use
81 * this boolean for bounce buffer decisions.
82 */
83#define PCI_DMA_BUS_IS_PHYS (1)
84
85#include <linux/types.h>
86#include <linux/slab.h>
87#include <asm/scatterlist.h>
88#include <linux/string.h>
89#include <asm/io.h>
90
91/* pci_unmap_{single,page} being a nop depends upon the
92 * configuration.
93 */
94#ifdef CONFIG_SH_PCIDMA_NONCOHERENT
95#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
96 dma_addr_t ADDR_NAME;
97#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
98 __u32 LEN_NAME;
99#define pci_unmap_addr(PTR, ADDR_NAME) \
100 ((PTR)->ADDR_NAME)
101#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
102 (((PTR)->ADDR_NAME) = (VAL))
103#define pci_unmap_len(PTR, LEN_NAME) \
104 ((PTR)->LEN_NAME)
105#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
106 (((PTR)->LEN_NAME) = (VAL))
107#else
108#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
109#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
110#define pci_unmap_addr(PTR, ADDR_NAME) (0)
111#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
112#define pci_unmap_len(PTR, LEN_NAME) (0)
113#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
114#endif
115
116#ifdef CONFIG_PCI
117static inline void pci_dma_burst_advice(struct pci_dev *pdev,
118 enum pci_dma_burst_strategy *strat,
119 unsigned long *strategy_parameter)
120{
121 *strat = PCI_DMA_BURST_INFINITY;
122 *strategy_parameter = ~0UL;
123}
124#endif
125
126/* Board-specific fixup routines. */
127void pcibios_fixup(void);
128int pcibios_init_platform(void);
129int pcibios_map_platform_irq(struct pci_dev *dev, u8 slot, u8 pin);
130
131#ifdef CONFIG_PCI_AUTO
132int pciauto_assign_resources(int busno, struct pci_channel *hose);
133#endif
134
135#endif /* __KERNEL__ */
136
137/* generic pci stuff */
138#include <asm-generic/pci.h>
139
140/* generic DMA-mapping stuff */
141#include <asm-generic/pci-dma-compat.h>
142
143#endif /* __ASM_SH_PCI_H */
144