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 */ 30struct 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 */ 59extern void register_pci_controller(struct pci_controller *hose); 60 61/* 62 * board supplied pci irq fixup routine 63 */ 64extern 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 */ 67extern int pcibios_plat_dev_init(struct pci_dev *dev); 68 69extern char * (*pcibios_plat_setup)(char *str); 70 71#ifdef CONFIG_OF 72/* this function parses memory ranges from a device node */ 73extern void pci_load_of_ranges(struct pci_controller *hose, 74 struct device_node *node); 75#else 76static inline void pci_load_of_ranges(struct pci_controller *hose, 77 struct device_node *node) {} 78#endif 79 80#ifdef CONFIG_PCI_DOMAINS_GENERIC 81static 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) 87static 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 */ 99static inline unsigned int pcibios_assign_all_busses(void) 100{ 101 return 1; 102} 103 104extern unsigned long PCIBIOS_MIN_IO; 105extern unsigned long PCIBIOS_MIN_MEM; 106 107#define PCIBIOS_MIN_CARDBUS_IO 0x4000 108 109extern void pcibios_set_master(struct pci_dev *dev); 110 111#define HAVE_PCI_MMAP 112#define ARCH_GENERIC_PCI_MMAP_RESOURCE 113#define HAVE_ARCH_PCI_RESOURCE_TO_USER 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 126struct pci_dev; 127 128/* 129 * The PCI address space does equal the physical memory address space. 130 * The networking and block device layers use this boolean for bounce 131 * buffer decisions. 132 */ 133#define PCI_DMA_BUS_IS_PHYS (1) 134 135#ifdef CONFIG_PCI_DOMAINS_GENERIC 136static inline int pci_proc_domain(struct pci_bus *bus) 137{ 138 return pci_domain_nr(bus); 139} 140#elif defined(CONFIG_PCI_DOMAINS) 141#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index 142 143static inline int pci_proc_domain(struct pci_bus *bus) 144{ 145 struct pci_controller *hose = bus->sysdata; 146 return hose->need_domain_info; 147} 148#endif /* CONFIG_PCI_DOMAINS */ 149 150#endif /* __KERNEL__ */ 151 152/* Do platform specific device initialization at pci_enable_device() time */ 153extern int pcibios_plat_dev_init(struct pci_dev *dev); 154 155/* Chances are this interrupt is wired PC-style ... */ 156static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 157{ 158 return channel ? 15 : 14; 159} 160 161#endif /* _ASM_PCI_H */ 162