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/list.h> 21 #include <linux/of.h> 22 23 #ifdef CONFIG_PCI_DRIVERS_LEGACY 24 25 /* 26 * Each pci channel is a top-level PCI bus seem by CPU. A machine with 27 * multiple PCI channels may have multiple PCI host controllers or a 28 * single controller supporting multiple channels. 29 */ 30 struct pci_controller { 31 struct list_head list; 32 struct pci_bus *bus; 33 struct device_node *of_node; 34 35 struct pci_ops *pci_ops; 36 struct resource *mem_resource; 37 unsigned long mem_offset; 38 struct resource *io_resource; 39 unsigned long io_offset; 40 unsigned long io_map_base; 41 struct resource *busn_resource; 42 unsigned long busn_offset; 43 44 #ifndef CONFIG_PCI_DOMAINS_GENERIC 45 unsigned int index; 46 /* For compatibility with current (as of July 2003) pciutils 47 and XFree86. Eventually will be removed. */ 48 unsigned int need_domain_info; 49 #endif 50 51 /* Optional access methods for reading/writing the bus number 52 of the PCI controller */ 53 int (*get_busno)(void); 54 void (*set_busno)(int busno); 55 }; 56 57 /* 58 * Used by boards to register their PCI busses before the actual scanning. 59 */ 60 extern void register_pci_controller(struct pci_controller *hose); 61 62 /* 63 * board supplied pci irq fixup routine 64 */ 65 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin); 66 67 /* Do platform specific device initialization at pci_enable_device() time */ 68 extern int pcibios_plat_dev_init(struct pci_dev *dev); 69 70 extern char * (*pcibios_plat_setup)(char *str); 71 72 #ifdef CONFIG_OF 73 /* this function parses memory ranges from a device node */ 74 extern void pci_load_of_ranges(struct pci_controller *hose, 75 struct device_node *node); 76 #else 77 static inline void pci_load_of_ranges(struct pci_controller *hose, 78 struct device_node *node) {} 79 #endif 80 81 #ifdef CONFIG_PCI_DOMAINS_GENERIC 82 static inline void set_pci_need_domain_info(struct pci_controller *hose, 83 int need_domain_info) 84 { 85 /* nothing to do */ 86 } 87 #elif defined(CONFIG_PCI_DOMAINS) 88 static inline void set_pci_need_domain_info(struct pci_controller *hose, 89 int need_domain_info) 90 { 91 hose->need_domain_info = need_domain_info; 92 } 93 #endif /* CONFIG_PCI_DOMAINS */ 94 95 #endif 96 97 /* Can be used to override the logic in pci_scan_bus for skipping 98 already-configured bus numbers - to be used for buggy BIOSes 99 or architectures with incomplete PCI setup by the loader */ 100 static inline unsigned int pcibios_assign_all_busses(void) 101 { 102 return 1; 103 } 104 105 extern unsigned long PCIBIOS_MIN_IO; 106 extern unsigned long PCIBIOS_MIN_MEM; 107 108 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 109 110 extern void pcibios_set_master(struct pci_dev *dev); 111 112 #define HAVE_PCI_MMAP 113 #define ARCH_GENERIC_PCI_MMAP_RESOURCE 114 #define HAVE_ARCH_PCI_RESOURCE_TO_USER 115 116 /* 117 * Dynamic DMA mapping stuff. 118 * MIPS has everything mapped statically. 119 */ 120 121 #include <linux/types.h> 122 #include <linux/slab.h> 123 #include <linux/scatterlist.h> 124 #include <linux/string.h> 125 #include <asm/io.h> 126 127 struct pci_dev; 128 129 /* 130 * The PCI address space does equal the physical memory address space. 131 * The networking and block device layers use this boolean for bounce 132 * buffer decisions. 133 */ 134 #define PCI_DMA_BUS_IS_PHYS (1) 135 136 #ifdef CONFIG_PCI_DOMAINS_GENERIC 137 static inline int pci_proc_domain(struct pci_bus *bus) 138 { 139 return pci_domain_nr(bus); 140 } 141 #elif defined(CONFIG_PCI_DOMAINS) 142 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index 143 144 static inline int pci_proc_domain(struct pci_bus *bus) 145 { 146 struct pci_controller *hose = bus->sysdata; 147 return hose->need_domain_info; 148 } 149 #endif /* CONFIG_PCI_DOMAINS */ 150 151 #endif /* __KERNEL__ */ 152 153 /* Do platform specific device initialization at pci_enable_device() time */ 154 extern int pcibios_plat_dev_init(struct pci_dev *dev); 155 156 /* Chances are this interrupt is wired PC-style ... */ 157 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 158 { 159 return channel ? 15 : 14; 160 } 161 162 #endif /* _ASM_PCI_H */ 163