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 43 #ifndef CONFIG_PCI_DOMAINS_GENERIC 44 unsigned int index; 45 /* For compatibility with current (as of July 2003) pciutils 46 and XFree86. Eventually will be removed. */ 47 unsigned int need_domain_info; 48 #endif 49 50 /* Optional access methods for reading/writing the bus number 51 of the PCI controller */ 52 int (*get_busno)(void); 53 void (*set_busno)(int busno); 54 }; 55 56 /* 57 * Used by boards to register their PCI busses before the actual scanning. 58 */ 59 extern void register_pci_controller(struct pci_controller *hose); 60 61 /* 62 * board supplied pci irq fixup routine 63 */ 64 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin); 65 66 /* Do platform specific device initialization at pci_enable_device() time */ 67 extern int pcibios_plat_dev_init(struct pci_dev *dev); 68 69 extern char * (*pcibios_plat_setup)(char *str); 70 71 #ifdef CONFIG_OF 72 /* this function parses memory ranges from a device node */ 73 extern void pci_load_of_ranges(struct pci_controller *hose, 74 struct device_node *node); 75 #else 76 static inline void pci_load_of_ranges(struct pci_controller *hose, 77 struct device_node *node) {} 78 #endif 79 80 #ifdef CONFIG_PCI_DOMAINS_GENERIC 81 static inline void set_pci_need_domain_info(struct pci_controller *hose, 82 int need_domain_info) 83 { 84 /* nothing to do */ 85 } 86 #elif defined(CONFIG_PCI_DOMAINS) 87 static inline void set_pci_need_domain_info(struct pci_controller *hose, 88 int need_domain_info) 89 { 90 hose->need_domain_info = need_domain_info; 91 } 92 #endif /* CONFIG_PCI_DOMAINS */ 93 94 #endif 95 96 /* Can be used to override the logic in pci_scan_bus for skipping 97 already-configured bus numbers - to be used for buggy BIOSes 98 or architectures with incomplete PCI setup by the loader */ 99 static inline unsigned int pcibios_assign_all_busses(void) 100 { 101 return 1; 102 } 103 104 extern unsigned long PCIBIOS_MIN_IO; 105 extern unsigned long PCIBIOS_MIN_MEM; 106 107 #define PCIBIOS_MIN_CARDBUS_IO 0x4000 108 109 #define HAVE_PCI_MMAP 110 #define ARCH_GENERIC_PCI_MMAP_RESOURCE 111 #define HAVE_ARCH_PCI_RESOURCE_TO_USER 112 113 /* 114 * Dynamic DMA mapping stuff. 115 * MIPS has everything mapped statically. 116 */ 117 118 #include <linux/types.h> 119 #include <linux/slab.h> 120 #include <linux/scatterlist.h> 121 #include <linux/string.h> 122 #include <asm/io.h> 123 124 #ifdef CONFIG_PCI_DOMAINS_GENERIC 125 static inline int pci_proc_domain(struct pci_bus *bus) 126 { 127 return pci_domain_nr(bus); 128 } 129 #elif defined(CONFIG_PCI_DOMAINS) 130 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index 131 132 static inline int pci_proc_domain(struct pci_bus *bus) 133 { 134 struct pci_controller *hose = bus->sysdata; 135 return hose->need_domain_info; 136 } 137 #endif /* CONFIG_PCI_DOMAINS */ 138 139 #endif /* __KERNEL__ */ 140 141 /* Do platform specific device initialization at pci_enable_device() time */ 142 extern int pcibios_plat_dev_init(struct pci_dev *dev); 143 144 /* Chances are this interrupt is wired PC-style ... */ 145 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 146 { 147 return channel ? 15 : 14; 148 } 149 150 #endif /* _ASM_PCI_H */ 151