1 #ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H
2 #define _ASM_MICROBLAZE_PCI_BRIDGE_H
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.
10 #include <linux/pci.h>
11 #include <linux/list.h>
12 #include <linux/ioport.h>
17 extern struct list_head hose_list;
18 extern int pcibios_vaddr_is_ioport(void __iomem *address);
20 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
27 * Structure of a PCI controller (host bridge)
29 struct pci_controller {
32 struct device_node *dn;
33 struct list_head list_node;
34 struct device *parent;
41 void __iomem *io_base_virt;
42 resource_size_t io_base_phys;
44 resource_size_t pci_io_size;
46 /* Some machines (PReP) have a non 1:1 mapping of
47 * the PCI memory space in the CPU bus space
49 resource_size_t pci_mem_offset;
51 /* Some machines have a special region to forward the ISA
52 * "memory" cycles such as VGA memory regions. Left to 0
55 resource_size_t isa_mem_phys;
56 resource_size_t isa_mem_size;
59 unsigned int __iomem *cfg_addr;
60 void __iomem *cfg_data;
63 * Used for variants of PCI indirect handling and possible quirks:
64 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
65 * EXT_REG - provides access to PCI-e extended registers
66 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
67 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
68 * to determine which bus number to match on when generating type0
70 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
71 * hanging if we don't have link and try to do config cycles to
72 * anything but the PHB. Only allow talking to the PHB if this is
74 * BIG_ENDIAN - cfg_addr is a big endian register
75 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs
76 * on the PLB4. Effectively disable MRM commands by setting this.
78 #define INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
79 #define INDIRECT_TYPE_EXT_REG 0x00000002
80 #define INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
81 #define INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
82 #define INDIRECT_TYPE_BIG_ENDIAN 0x00000010
83 #define INDIRECT_TYPE_BROKEN_MRM 0x00000020
86 /* Currently, we limit ourselves to 1 IO range and 3 mem
87 * ranges since the common pci_bus structure can't handle more
89 struct resource io_resource;
90 struct resource mem_resources[3];
91 int global_number; /* PCI domain number */
95 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
100 static inline int isa_vaddr_is_ioport(void __iomem *address)
102 /* No specific ISA handling on ppc32 at this stage, it
103 * all goes through PCI
107 #endif /* CONFIG_PCI */
109 /* These are used for config access before all the PCI probing
111 extern int early_read_config_byte(struct pci_controller *hose, int bus,
112 int dev_fn, int where, u8 *val);
113 extern int early_read_config_word(struct pci_controller *hose, int bus,
114 int dev_fn, int where, u16 *val);
115 extern int early_read_config_dword(struct pci_controller *hose, int bus,
116 int dev_fn, int where, u32 *val);
117 extern int early_write_config_byte(struct pci_controller *hose, int bus,
118 int dev_fn, int where, u8 val);
119 extern int early_write_config_word(struct pci_controller *hose, int bus,
120 int dev_fn, int where, u16 val);
121 extern int early_write_config_dword(struct pci_controller *hose, int bus,
122 int dev_fn, int where, u32 val);
124 extern int early_find_capability(struct pci_controller *hose, int bus,
125 int dev_fn, int cap);
127 extern void setup_indirect_pci(struct pci_controller *hose,
128 resource_size_t cfg_addr,
129 resource_size_t cfg_data, u32 flags);
131 /* Get the PCI host controller for an OF device */
132 extern struct pci_controller *pci_find_hose_for_OF_device(
133 struct device_node *node);
135 /* Fill up host controller resources from the OF node */
136 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
137 struct device_node *dev, int primary);
139 /* Allocate & free a PCI host bridge structure */
140 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
141 extern void pcibios_free_controller(struct pci_controller *phb);
143 #endif /* __KERNEL__ */
144 #endif /* _ASM_MICROBLAZE_PCI_BRIDGE_H */