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Diffstat (limited to 'include/asm-ppc64/prom.h')
| -rw-r--r-- | include/asm-ppc64/prom.h | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/include/asm-ppc64/prom.h b/include/asm-ppc64/prom.h new file mode 100644 index 00000000000..2440a2c90ae --- /dev/null +++ b/include/asm-ppc64/prom.h @@ -0,0 +1,230 @@ +#ifndef _PPC64_PROM_H +#define _PPC64_PROM_H + +/* + * Definitions for talking to the Open Firmware PROM on + * Power Macintosh computers. + * + * Copyright (C) 1996 Paul Mackerras. + * + * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include <linux/proc_fs.h> +#include <asm/atomic.h> + +#define PTRRELOC(x) ((typeof(x))((unsigned long)(x) - offset)) +#define PTRUNRELOC(x) ((typeof(x))((unsigned long)(x) + offset)) +#define RELOC(x) (*PTRRELOC(&(x))) + +/* Definitions used by the flattened device tree */ +#define OF_DT_HEADER 0xd00dfeed /* 4: version, 4: total size */ +#define OF_DT_BEGIN_NODE 0x1 /* Start node: full name */ +#define OF_DT_END_NODE 0x2 /* End node */ +#define OF_DT_PROP 0x3 /* Property: name off, size, content */ +#define OF_DT_END 0x9 + +#define OF_DT_VERSION 1 + +/* + * This is what gets passed to the kernel by prom_init or kexec + * + * The dt struct contains the device tree structure, full pathes and + * property contents. The dt strings contain a separate block with just + * the strings for the property names, and is fully page aligned and + * self contained in a page, so that it can be kept around by the kernel, + * each property name appears only once in this page (cheap compression) + * + * the mem_rsvmap contains a map of reserved ranges of physical memory, + * passing it here instead of in the device-tree itself greatly simplifies + * the job of everybody. It's just a list of u64 pairs (base/size) that + * ends when size is 0 + */ +struct boot_param_header +{ + u32 magic; /* magic word OF_DT_HEADER */ + u32 totalsize; /* total size of DT block */ + u32 off_dt_struct; /* offset to structure */ + u32 off_dt_strings; /* offset to strings */ + u32 off_mem_rsvmap; /* offset to memory reserve map */ + u32 version; /* format version */ + u32 last_comp_version; /* last compatible version */ + /* version 2 fields below */ + u32 boot_cpuid_phys; /* Which physical CPU id we're booting on */ +}; + + + +typedef u32 phandle; +typedef u32 ihandle; + +struct address_range { + unsigned long space; + unsigned long address; + unsigned long size; +}; + +struct interrupt_info { + int line; + int sense; /* +ve/-ve logic, edge or level, etc. */ +}; + +struct pci_address { + u32 a_hi; + u32 a_mid; + u32 a_lo; +}; + +struct isa_address { + u32 a_hi; + u32 a_lo; +}; + +struct isa_range { + struct isa_address isa_addr; + struct pci_address pci_addr; + unsigned int size; +}; + +struct reg_property { + unsigned long address; + unsigned long size; +}; + +struct reg_property32 { + unsigned int address; + unsigned int size; +}; + +struct reg_property64 { + unsigned long address; + unsigned long size; +}; + +struct property { + char *name; + int length; + unsigned char *value; + struct property *next; +}; + +/* NOTE: the device_node contains PCI specific info for pci devices. + * This perhaps could be hung off the device_node with another struct, + * but for now it is directly in the node. The phb ptr is a good + * indication of a real PCI node. Other nodes leave these fields zeroed. + */ +struct pci_controller; +struct iommu_table; + +struct device_node { + char *name; + char *type; + phandle node; + phandle linux_phandle; + int n_addrs; + struct address_range *addrs; + int n_intrs; + struct interrupt_info *intrs; + char *full_name; + + /* PCI stuff probably doesn't belong here */ + int busno; /* for pci devices */ + int bussubno; /* for pci devices */ + int devfn; /* for pci devices */ + int eeh_mode; /* See eeh.h for possible EEH_MODEs */ + int eeh_config_addr; + int pci_ext_config_space; /* for pci devices */ + struct pci_controller *phb; /* for pci devices */ + struct iommu_table *iommu_table; /* for phb's or bridges */ + + struct property *properties; + struct device_node *parent; + struct device_node *child; + struct device_node *sibling; + struct device_node *next; /* next device of same type */ + struct device_node *allnext; /* next in list of all nodes */ + struct proc_dir_entry *pde; /* this node's proc directory */ + struct proc_dir_entry *name_link; /* name symlink */ + struct proc_dir_entry *addr_link; /* addr symlink */ + struct kref kref; + unsigned long _flags; +}; + +extern struct device_node *of_chosen; + +/* flag descriptions */ +#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ + +#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) +#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) + +/* + * Until 32-bit ppc can add proc_dir_entries to its device_node + * definition, we cannot refer to pde, name_link, and addr_link + * in arch-independent code. + */ +#define HAVE_ARCH_DEVTREE_FIXUPS + +static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de) +{ + dn->pde = de; +} + +static void inline set_node_name_link(struct device_node *dn, struct proc_dir_entry *de) +{ + dn->name_link = de; +} + +static void inline set_node_addr_link(struct device_node *dn, struct proc_dir_entry *de) +{ + dn->addr_link = de; +} + +/* OBSOLETE: Old stlye node lookup */ +extern struct device_node *find_devices(const char *name); +extern struct device_node *find_type_devices(const char *type); +extern struct device_node *find_path_device(const char *path); +extern struct device_node *find_compatible_devices(const char *type, + const char *compat); +extern struct device_node *find_all_nodes(void); + +/* New style node lookup */ +extern struct device_node *of_find_node_by_name(struct device_node *from, + const char *name); +extern struct device_node *of_find_node_by_type(struct device_node *from, + const char *type); +extern struct device_node *of_find_compatible_node(struct device_node *from, + const char *type, const char *compat); +extern struct device_node *of_find_node_by_path(const char *path); +extern struct device_node *of_find_node_by_phandle(phandle handle); +extern struct device_node *of_find_all_nodes(struct device_node *prev); +extern struct device_node *of_get_parent(const struct device_node *node); +extern struct device_node *of_get_next_child(const struct device_node *node, + struct device_node *prev); +extern struct device_node *of_node_get(struct device_node *node); +extern void of_node_put(struct device_node *node); + +/* For updating the device tree at runtime */ +extern void of_attach_node(struct device_node *); +extern void of_detach_node(const struct device_node *); + +/* Other Prototypes */ +extern unsigned long prom_init(unsigned long, unsigned long, unsigned long, + unsigned long, unsigned long); +extern void finish_device_tree(void); +extern int device_is_compatible(struct device_node *device, const char *); +extern int machine_is_compatible(const char *compat); +extern unsigned char *get_property(struct device_node *node, const char *name, + int *lenp); +extern void print_properties(struct device_node *node); +extern int prom_n_addr_cells(struct device_node* np); +extern int prom_n_size_cells(struct device_node* np); +extern int prom_n_intr_cells(struct device_node* np); +extern void prom_get_irq_senses(unsigned char *senses, int off, int max); +extern void prom_add_property(struct device_node* np, struct property* prop); + +#endif /* _PPC64_PROM_H */ |