1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_MICROBLAZE_PCI_BRIDGE_H
3 #define _ASM_MICROBLAZE_PCI_BRIDGE_H
8 #include <linux/list.h>
9 #include <linux/ioport.h>
14 extern struct list_head hose_list;
15 extern int pcibios_vaddr_is_ioport(void __iomem *address);
17 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
24 * Structure of a PCI controller (host bridge)
26 struct pci_controller {
29 struct device_node *dn;
30 struct list_head list_node;
31 struct device *parent;
38 void __iomem *io_base_virt;
39 resource_size_t io_base_phys;
41 /* Some machines (PReP) have a non 1:1 mapping of
42 * the PCI memory space in the CPU bus space
44 resource_size_t pci_mem_offset;
47 unsigned int __iomem *cfg_addr;
48 void __iomem *cfg_data;
51 * Used for variants of PCI indirect handling and possible quirks:
52 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
53 * EXT_REG - provides access to PCI-e extended registers
54 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
55 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
56 * to determine which bus number to match on when generating type0
58 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
59 * hanging if we don't have link and try to do config cycles to
60 * anything but the PHB. Only allow talking to the PHB if this is
62 * BIG_ENDIAN - cfg_addr is a big endian register
63 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs
64 * on the PLB4. Effectively disable MRM commands by setting this.
66 #define INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
67 #define INDIRECT_TYPE_EXT_REG 0x00000002
68 #define INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
69 #define INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
70 #define INDIRECT_TYPE_BIG_ENDIAN 0x00000010
71 #define INDIRECT_TYPE_BROKEN_MRM 0x00000020
74 /* Currently, we limit ourselves to 1 IO range and 3 mem
75 * ranges since the common pci_bus structure can't handle more
77 struct resource io_resource;
78 struct resource mem_resources[3];
79 int global_number; /* PCI domain number */
83 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
88 static inline int isa_vaddr_is_ioport(void __iomem *address)
90 /* No specific ISA handling on ppc32 at this stage, it
91 * all goes through PCI
95 #endif /* CONFIG_PCI */
97 extern void setup_indirect_pci(struct pci_controller *hose,
98 resource_size_t cfg_addr,
99 resource_size_t cfg_data, u32 flags);
101 /* Allocate & free a PCI host bridge structure */
102 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
103 extern void pcibios_free_controller(struct pci_controller *phb);
105 #endif /* __KERNEL__ */
106 #endif /* _ASM_MICROBLAZE_PCI_BRIDGE_H */