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
14 * This file essentially defines the interface between board
15 * specific PCI code and MIPS common PCI code. Should potentially put
16 * into include/asm/pci.h file.
19 #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
;
30 struct device_node
*of_node
;
32 struct pci_ops
*pci_ops
;
33 struct resource
*mem_resource
;
34 unsigned long mem_offset
;
35 struct resource
*io_resource
;
36 unsigned long io_offset
;
37 unsigned long io_map_base
;
40 /* For compatibility with current (as of July 2003) pciutils
41 and XFree86. Eventually will be removed. */
42 unsigned int need_domain_info
;
46 /* Optional access methods for reading/writing the bus number
47 of the PCI controller */
48 int (*get_busno
)(void);
49 void (*set_busno
)(int busno
);
53 * Used by boards to register their PCI busses before the actual scanning.
55 extern void register_pci_controller(struct pci_controller
*hose
);
58 * board supplied pci irq fixup routine
60 extern int pcibios_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
);
63 /* Can be used to override the logic in pci_scan_bus for skipping
64 already-configured bus numbers - to be used for buggy BIOSes
65 or architectures with incomplete PCI setup by the loader */
67 extern unsigned int pcibios_assign_all_busses(void);
69 extern unsigned long PCIBIOS_MIN_IO
;
70 extern unsigned long PCIBIOS_MIN_MEM
;
72 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
74 extern void pcibios_set_master(struct pci_dev
*dev
);
76 static inline void pcibios_penalize_isa_irq(int irq
, int active
)
78 /* We don't do dynamic PCI IRQ allocation */
83 extern int pci_mmap_page_range(struct pci_dev
*dev
, struct vm_area_struct
*vma
,
84 enum pci_mmap_state mmap_state
, int write_combine
);
87 * Dynamic DMA mapping stuff.
88 * MIPS has everything mapped statically.
91 #include <linux/types.h>
92 #include <linux/slab.h>
93 #include <asm/scatterlist.h>
94 #include <linux/string.h>
96 #include <asm-generic/pci-bridge.h>
101 * The PCI address space does equal the physical memory address space. The
102 * networking and block device layers use this boolean for bounce buffer
103 * decisions. This is set if any hose does not have an IOMMU.
105 extern unsigned int PCI_DMA_BUS_IS_PHYS
;
108 static inline void pci_dma_burst_advice(struct pci_dev
*pdev
,
109 enum pci_dma_burst_strategy
*strat
,
110 unsigned long *strategy_parameter
)
112 *strat
= PCI_DMA_BURST_INFINITY
;
113 *strategy_parameter
= ~0UL;
117 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
119 static inline int pci_proc_domain(struct pci_bus
*bus
)
121 struct pci_controller
*hose
= bus
->sysdata
;
122 return hose
->need_domain_info
;
125 #endif /* __KERNEL__ */
127 /* implement the pci_ DMA API in terms of the generic device dma_ one */
128 #include <asm-generic/pci-dma-compat.h>
130 /* Do platform specific device initialization at pci_enable_device() time */
131 extern int pcibios_plat_dev_init(struct pci_dev
*dev
);
133 /* Chances are this interrupt is wired PC-style ... */
134 static inline int pci_get_legacy_ide_irq(struct pci_dev
*dev
, int channel
)
136 return channel
? 15 : 14;
139 extern char * (*pcibios_plat_setup
)(char *str
);
142 /* this function parses memory ranges from a device node */
143 extern void pci_load_of_ranges(struct pci_controller
*hose
,
144 struct device_node
*node
);
146 static inline void pci_load_of_ranges(struct pci_controller
*hose
,
147 struct device_node
*node
) {}
150 #endif /* _ASM_PCI_H */