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