1 /* 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 4 * for more details. 5 */ 6 #ifndef _ASM_PCI_H 7 #define _ASM_PCI_H 8 9 #include <linux/mm.h> 10 11 #ifdef __KERNEL__ 12 13 /* 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. 17 */ 18 19 #include <linux/ioport.h> 20 #include <linux/of.h> 21 22 /* 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. 26 */ 27 struct pci_controller { 28 struct pci_controller *next; 29 struct pci_bus *bus; 30 struct device_node *of_node; 31 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 39 unsigned int index; 40 /* For compatibility with current (as of July 2003) pciutils 41 and XFree86. Eventually will be removed. */ 42 unsigned int need_domain_info; 43 44 int iommu; 45 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); 50 }; 51 52 /* 53 * Used by boards to register their PCI busses before the actual scanning. 54 */ 55 extern void register_pci_controller(struct pci_controller *hose); 56 57 /* 58 * board supplied pci irq fixup routine 59 */ 60 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin); 61 62 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 */ 66 67 extern unsigned int pcibios_assign_all_busses(void); 68 69 extern unsigned long PCIBIOS_MIN_IO; 70 extern unsigned long PCIBIOS_MIN_MEM; 71 72 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 73 74 extern void pcibios_set_master(struct pci_dev *dev); 75 76 #define HAVE_PCI_MMAP 77 78 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, 79 enum pci_mmap_state mmap_state, int write_combine); 80 81 #define HAVE_ARCH_PCI_RESOURCE_TO_USER 82 83 static inline void pci_resource_to_user(const struct pci_dev *dev, int bar, 84 const struct resource *rsrc, resource_size_t *start, 85 resource_size_t *end) 86 { 87 phys_addr_t size = resource_size(rsrc); 88 89 *start = fixup_bigphys_addr(rsrc->start, size); 90 *end = rsrc->start + size; 91 } 92 93 /* 94 * Dynamic DMA mapping stuff. 95 * MIPS has everything mapped statically. 96 */ 97 98 #include <linux/types.h> 99 #include <linux/slab.h> 100 #include <asm/scatterlist.h> 101 #include <linux/string.h> 102 #include <asm/io.h> 103 #include <asm-generic/pci-bridge.h> 104 105 struct pci_dev; 106 107 /* 108 * The PCI address space does equal the physical memory address space. The 109 * networking and block device layers use this boolean for bounce buffer 110 * decisions. This is set if any hose does not have an IOMMU. 111 */ 112 extern unsigned int PCI_DMA_BUS_IS_PHYS; 113 114 #ifdef CONFIG_PCI 115 static inline void pci_dma_burst_advice(struct pci_dev *pdev, 116 enum pci_dma_burst_strategy *strat, 117 unsigned long *strategy_parameter) 118 { 119 *strat = PCI_DMA_BURST_INFINITY; 120 *strategy_parameter = ~0UL; 121 } 122 #endif 123 124 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index 125 126 static inline int pci_proc_domain(struct pci_bus *bus) 127 { 128 struct pci_controller *hose = bus->sysdata; 129 return hose->need_domain_info; 130 } 131 132 #endif /* __KERNEL__ */ 133 134 /* implement the pci_ DMA API in terms of the generic device dma_ one */ 135 #include <asm-generic/pci-dma-compat.h> 136 137 /* Do platform specific device initialization at pci_enable_device() time */ 138 extern int pcibios_plat_dev_init(struct pci_dev *dev); 139 140 /* Chances are this interrupt is wired PC-style ... */ 141 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 142 { 143 return channel ? 15 : 14; 144 } 145 146 extern char * (*pcibios_plat_setup)(char *str); 147 148 #ifdef CONFIG_OF 149 /* this function parses memory ranges from a device node */ 150 extern void pci_load_of_ranges(struct pci_controller *hose, 151 struct device_node *node); 152 #else 153 static inline void pci_load_of_ranges(struct pci_controller *hose, 154 struct device_node *node) {} 155 #endif 156 157 #endif /* _ASM_PCI_H */ 158