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;
38 struct resource *busn_resource;
39 unsigned long busn_offset;
42 /* For compatibility with current (as of July 2003) pciutils
43 and XFree86. Eventually will be removed. */
44 unsigned int need_domain_info;
48 /* Optional access methods for reading/writing the bus number
49 of the PCI controller */
50 int (*get_busno)(void);
51 void (*set_busno)(int busno);
55 * Used by boards to register their PCI busses before the actual scanning.
57 extern void register_pci_controller(struct pci_controller *hose);
60 * board supplied pci irq fixup routine
62 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
65 /* Can be used to override the logic in pci_scan_bus for skipping
66 already-configured bus numbers - to be used for buggy BIOSes
67 or architectures with incomplete PCI setup by the loader */
69 extern unsigned int pcibios_assign_all_busses(void);
71 extern unsigned long PCIBIOS_MIN_IO;
72 extern unsigned long PCIBIOS_MIN_MEM;
74 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
76 extern void pcibios_set_master(struct pci_dev *dev);
80 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
81 enum pci_mmap_state mmap_state, int write_combine);
83 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
85 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
86 const struct resource *rsrc, resource_size_t *start,
89 phys_addr_t size = resource_size(rsrc);
91 *start = fixup_bigphys_addr(rsrc->start, size);
92 *end = rsrc->start + size;
96 * Dynamic DMA mapping stuff.
97 * MIPS has everything mapped statically.
100 #include <linux/types.h>
101 #include <linux/slab.h>
102 #include <asm/scatterlist.h>
103 #include <linux/string.h>
105 #include <asm-generic/pci-bridge.h>
110 * The PCI address space does equal the physical memory address space. The
111 * networking and block device layers use this boolean for bounce buffer
112 * decisions. This is set if any hose does not have an IOMMU.
114 extern unsigned int PCI_DMA_BUS_IS_PHYS;
117 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
118 enum pci_dma_burst_strategy *strat,
119 unsigned long *strategy_parameter)
121 *strat = PCI_DMA_BURST_INFINITY;
122 *strategy_parameter = ~0UL;
126 #ifdef CONFIG_PCI_DOMAINS
127 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
129 static inline int pci_proc_domain(struct pci_bus *bus)
131 struct pci_controller *hose = bus->sysdata;
132 return hose->need_domain_info;
134 #endif /* CONFIG_PCI_DOMAINS */
136 #endif /* __KERNEL__ */
138 /* implement the pci_ DMA API in terms of the generic device dma_ one */
139 #include <asm-generic/pci-dma-compat.h>
141 /* Do platform specific device initialization at pci_enable_device() time */
142 extern int pcibios_plat_dev_init(struct pci_dev *dev);
144 /* Chances are this interrupt is wired PC-style ... */
145 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
147 return channel ? 15 : 14;
150 extern char * (*pcibios_plat_setup)(char *str);
153 /* this function parses memory ranges from a device node */
154 extern void pci_load_of_ranges(struct pci_controller *hose,
155 struct device_node *node);
157 static inline void pci_load_of_ranges(struct pci_controller *hose,
158 struct device_node *node) {}
161 #endif /* _ASM_PCI_H */