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