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2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
9 #include <linux/config.h>
15 * This file essentially defines the interface between board
16 * specific PCI code and MIPS common PCI code. Should potentially put
17 * into include/asm/pci.h file.
20 #include <linux/ioport.h>
23 * Each pci channel is a top-level PCI bus seem by CPU. A machine with
24 * multiple PCI channels may have multiple PCI host controllers or a
25 * single controller supporting multiple channels.
27 struct pci_controller
{
28 struct pci_controller
*next
;
31 struct pci_ops
*pci_ops
;
32 struct resource
*mem_resource
;
33 unsigned long mem_offset
;
34 struct resource
*io_resource
;
35 unsigned long io_offset
;
38 /* For compatibility with current (as of July 2003) pciutils
39 and XFree86. Eventually will be removed. */
40 unsigned int need_domain_info
;
46 * Used by boards to register their PCI busses before the actual scanning.
48 extern struct pci_controller
* alloc_pci_controller(void);
49 extern void register_pci_controller(struct pci_controller
*hose
);
52 * board supplied pci irq fixup routine
54 extern int pcibios_map_irq(struct pci_dev
*dev
, u8 slot
, u8 pin
);
57 /* Can be used to override the logic in pci_scan_bus for skipping
58 already-configured bus numbers - to be used for buggy BIOSes
59 or architectures with incomplete PCI setup by the loader */
61 extern unsigned int pcibios_assign_all_busses(void);
63 #define pcibios_scan_all_fns(a, b) 0
65 extern unsigned long PCIBIOS_MIN_IO
;
66 extern unsigned long PCIBIOS_MIN_MEM
;
68 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
70 extern void pcibios_set_master(struct pci_dev
*dev
);
72 static inline void pcibios_penalize_isa_irq(int irq
)
74 /* We don't do dynamic PCI IRQ allocation */
78 * Dynamic DMA mapping stuff.
79 * MIPS has everything mapped statically.
82 #include <linux/types.h>
83 #include <linux/slab.h>
84 #include <asm/scatterlist.h>
85 #include <linux/string.h>
91 * The PCI address space does equal the physical memory address space. The
92 * networking and block device layers use this boolean for bounce buffer
93 * decisions. This is set if any hose does not have an IOMMU.
95 extern unsigned int PCI_DMA_BUS_IS_PHYS
;
97 #ifdef CONFIG_MAPPED_DMA_IO
99 /* pci_unmap_{single,page} is not a nop, thus... */
100 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME;
101 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME;
102 #define pci_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME)
103 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
104 #define pci_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME)
105 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL))
107 #else /* CONFIG_MAPPED_DMA_IO */
109 /* pci_unmap_{page,single} is a nop so... */
110 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
111 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
112 #define pci_unmap_addr(PTR, ADDR_NAME) (0)
113 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
114 #define pci_unmap_len(PTR, LEN_NAME) (0)
115 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
117 #endif /* CONFIG_MAPPED_DMA_IO */
119 /* This is always fine. */
120 #define pci_dac_dma_supported(pci_dev, mask) (1)
122 extern dma64_addr_t
pci_dac_page_to_dma(struct pci_dev
*pdev
,
123 struct page
*page
, unsigned long offset
, int direction
);
124 extern struct page
*pci_dac_dma_to_page(struct pci_dev
*pdev
,
125 dma64_addr_t dma_addr
);
126 extern unsigned long pci_dac_dma_to_offset(struct pci_dev
*pdev
,
127 dma64_addr_t dma_addr
);
128 extern void pci_dac_dma_sync_single_for_cpu(struct pci_dev
*pdev
,
129 dma64_addr_t dma_addr
, size_t len
, int direction
);
130 extern void pci_dac_dma_sync_single_for_device(struct pci_dev
*pdev
,
131 dma64_addr_t dma_addr
, size_t len
, int direction
);
133 extern void pcibios_resource_to_bus(struct pci_dev
*dev
,
134 struct pci_bus_region
*region
, struct resource
*res
);
136 #ifdef CONFIG_PCI_DOMAINS
138 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
140 static inline int pci_proc_domain(struct pci_bus
*bus
)
142 struct pci_controller
*hose
= bus
->sysdata
;
143 return hose
->need_domain_info
;
146 #endif /* CONFIG_PCI_DOMAINS */
148 #endif /* __KERNEL__ */
150 /* implement the pci_ DMA API in terms of the generic device dma_ one */
151 #include <asm-generic/pci-dma-compat.h>
153 static inline void pcibios_add_platform_entries(struct pci_dev
*dev
)
157 /* Do platform specific device initialization at pci_enable_device() time */
158 extern int pcibios_plat_dev_init(struct pci_dev
*dev
);
160 #endif /* _ASM_PCI_H */