1 #ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H 2 #define _ASM_MICROBLAZE_PCI_BRIDGE_H 3 #ifdef __KERNEL__ 4 /* 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 8 * 2 of the License, or (at your option) any later version. 9 */ 10 #include <linux/pci.h> 11 #include <linux/list.h> 12 #include <linux/ioport.h> 13 14 struct device_node; 15 16 enum { 17 /* Force re-assigning all resources (ignore firmware 18 * setup completely) 19 */ 20 PCI_REASSIGN_ALL_RSRC = 0x00000001, 21 22 /* Re-assign all bus numbers */ 23 PCI_REASSIGN_ALL_BUS = 0x00000002, 24 25 /* Do not try to assign, just use existing setup */ 26 PCI_PROBE_ONLY = 0x00000004, 27 28 /* Don't bother with ISA alignment unless the bridge has 29 * ISA forwarding enabled 30 */ 31 PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, 32 33 /* Enable domain numbers in /proc */ 34 PCI_ENABLE_PROC_DOMAINS = 0x00000010, 35 /* ... except for domain 0 */ 36 PCI_COMPAT_DOMAIN_0 = 0x00000020, 37 }; 38 39 /* 40 * Structure of a PCI controller (host bridge) 41 */ 42 struct pci_controller { 43 struct pci_bus *bus; 44 char is_dynamic; 45 struct device_node *dn; 46 struct list_head list_node; 47 struct device *parent; 48 49 int first_busno; 50 int last_busno; 51 52 int self_busno; 53 54 void __iomem *io_base_virt; 55 resource_size_t io_base_phys; 56 57 resource_size_t pci_io_size; 58 59 /* Some machines (PReP) have a non 1:1 mapping of 60 * the PCI memory space in the CPU bus space 61 */ 62 resource_size_t pci_mem_offset; 63 64 /* Some machines have a special region to forward the ISA 65 * "memory" cycles such as VGA memory regions. Left to 0 66 * if unsupported 67 */ 68 resource_size_t isa_mem_phys; 69 resource_size_t isa_mem_size; 70 71 struct pci_ops *ops; 72 unsigned int __iomem *cfg_addr; 73 void __iomem *cfg_data; 74 75 /* 76 * Used for variants of PCI indirect handling and possible quirks: 77 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 78 * EXT_REG - provides access to PCI-e extended registers 79 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS 80 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS 81 * to determine which bus number to match on when generating type0 82 * config cycles 83 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with 84 * hanging if we don't have link and try to do config cycles to 85 * anything but the PHB. Only allow talking to the PHB if this is 86 * set. 87 * BIG_ENDIAN - cfg_addr is a big endian register 88 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs 89 * on the PLB4. Effectively disable MRM commands by setting this. 90 */ 91 #define INDIRECT_TYPE_SET_CFG_TYPE 0x00000001 92 #define INDIRECT_TYPE_EXT_REG 0x00000002 93 #define INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004 94 #define INDIRECT_TYPE_NO_PCIE_LINK 0x00000008 95 #define INDIRECT_TYPE_BIG_ENDIAN 0x00000010 96 #define INDIRECT_TYPE_BROKEN_MRM 0x00000020 97 u32 indirect_type; 98 99 /* Currently, we limit ourselves to 1 IO range and 3 mem 100 * ranges since the common pci_bus structure can't handle more 101 */ 102 struct resource io_resource; 103 struct resource mem_resources[3]; 104 int global_number; /* PCI domain number */ 105 }; 106 107 #ifdef CONFIG_PCI 108 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 109 { 110 return bus->sysdata; 111 } 112 113 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) 114 { 115 struct pci_controller *host; 116 117 if (bus->self) 118 return pci_device_to_OF_node(bus->self); 119 host = pci_bus_to_host(bus); 120 return host ? host->dn : NULL; 121 } 122 123 static inline int isa_vaddr_is_ioport(void __iomem *address) 124 { 125 /* No specific ISA handling on ppc32 at this stage, it 126 * all goes through PCI 127 */ 128 return 0; 129 } 130 #endif /* CONFIG_PCI */ 131 132 /* These are used for config access before all the PCI probing 133 has been done. */ 134 extern int early_read_config_byte(struct pci_controller *hose, int bus, 135 int dev_fn, int where, u8 *val); 136 extern int early_read_config_word(struct pci_controller *hose, int bus, 137 int dev_fn, int where, u16 *val); 138 extern int early_read_config_dword(struct pci_controller *hose, int bus, 139 int dev_fn, int where, u32 *val); 140 extern int early_write_config_byte(struct pci_controller *hose, int bus, 141 int dev_fn, int where, u8 val); 142 extern int early_write_config_word(struct pci_controller *hose, int bus, 143 int dev_fn, int where, u16 val); 144 extern int early_write_config_dword(struct pci_controller *hose, int bus, 145 int dev_fn, int where, u32 val); 146 147 extern int early_find_capability(struct pci_controller *hose, int bus, 148 int dev_fn, int cap); 149 150 extern void setup_indirect_pci(struct pci_controller *hose, 151 resource_size_t cfg_addr, 152 resource_size_t cfg_data, u32 flags); 153 154 /* Get the PCI host controller for an OF device */ 155 extern struct pci_controller *pci_find_hose_for_OF_device( 156 struct device_node *node); 157 158 /* Fill up host controller resources from the OF node */ 159 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, 160 struct device_node *dev, int primary); 161 162 /* Allocate & free a PCI host bridge structure */ 163 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); 164 extern void pcibios_free_controller(struct pci_controller *phb); 165 extern void pcibios_setup_phb_resources(struct pci_controller *hose); 166 167 #ifdef CONFIG_PCI 168 extern unsigned int pci_flags; 169 170 static inline void pci_set_flags(int flags) 171 { 172 pci_flags = flags; 173 } 174 175 static inline void pci_add_flags(int flags) 176 { 177 pci_flags |= flags; 178 } 179 180 static inline int pci_has_flag(int flag) 181 { 182 return pci_flags & flag; 183 } 184 185 extern struct list_head hose_list; 186 187 extern int pcibios_vaddr_is_ioport(void __iomem *address); 188 #else 189 static inline int pcibios_vaddr_is_ioport(void __iomem *address) 190 { 191 return 0; 192 } 193 194 static inline void pci_set_flags(int flags) { } 195 static inline void pci_add_flags(int flags) { } 196 static inline int pci_has_flag(int flag) 197 { 198 return 0; 199 } 200 #endif /* CONFIG_PCI */ 201 202 #endif /* __KERNEL__ */ 203 #endif /* _ASM_MICROBLAZE_PCI_BRIDGE_H */ 204