337 lines
11 KiB
C
337 lines
11 KiB
C
#ifndef _POWERPC_PROM_H
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#define _POWERPC_PROM_H
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#ifdef __KERNEL__
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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) 1996-2005 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/types.h>
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#include <linux/proc_fs.h>
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#include <asm/atomic.h>
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/* Definitions used by the flattened device tree */
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#define OF_DT_HEADER 0xd00dfeed /* marker */
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#define OF_DT_BEGIN_NODE 0x1 /* Start of 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,
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* content */
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#define OF_DT_NOP 0x4 /* nop */
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#define OF_DT_END 0x9
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#define OF_DT_VERSION 0x10
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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; /* Physical CPU id we're booting on */
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/* version 3 fields below */
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u32 dt_strings_size; /* size of the DT strings block */
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};
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typedef u32 phandle;
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typedef u32 ihandle;
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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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struct device_node {
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const char *name;
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const char *type;
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phandle node;
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phandle linux_phandle;
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char *full_name;
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struct property *properties;
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struct property *deadprops; /* removed 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 kref kref;
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unsigned long _flags;
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void *data;
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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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#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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/* OBSOLETE: Old style 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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#define for_each_node_by_name(dn, name) \
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for (dn = of_find_node_by_name(NULL, name); dn; \
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dn = of_find_node_by_name(dn, 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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#define for_each_node_by_type(dn, type) \
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for (dn = of_find_node_by_type(NULL, type); dn; \
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dn = of_find_node_by_type(dn, 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 property *of_find_property(struct device_node *np,
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const char *name,
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int *lenp);
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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 scanning the flat device-tree at boot time */
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extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
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const char *uname, int depth,
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void *data),
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void *data);
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extern void* __init of_get_flat_dt_prop(unsigned long node, const char *name,
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unsigned long *size);
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extern int __init of_flat_dt_is_compatible(unsigned long node, const char *name);
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extern unsigned long __init of_get_flat_dt_root(void);
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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 void finish_device_tree(void);
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extern void unflatten_device_tree(void);
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extern void early_init_devtree(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 const void *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 int prom_add_property(struct device_node* np, struct property* prop);
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extern int prom_remove_property(struct device_node *np, struct property *prop);
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extern int prom_update_property(struct device_node *np,
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struct property *newprop,
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struct property *oldprop);
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#ifdef CONFIG_PPC32
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/*
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* PCI <-> OF matching functions
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* (XXX should these be here?)
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*/
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struct pci_bus;
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struct pci_dev;
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extern int pci_device_from_OF_node(struct device_node *node,
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u8* bus, u8* devfn);
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extern struct device_node* pci_busdev_to_OF_node(struct pci_bus *, int);
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extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
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extern void pci_create_OF_bus_map(void);
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#endif
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extern struct resource *request_OF_resource(struct device_node* node,
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int index, const char* name_postfix);
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extern int release_OF_resource(struct device_node* node, int index);
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/*
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* OF address retreival & translation
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*/
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/* Helper to read a big number; size is in cells (not bytes) */
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static inline u64 of_read_number(const u32 *cell, int size)
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{
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u64 r = 0;
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while (size--)
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r = (r << 32) | *(cell++);
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return r;
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}
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/* Like of_read_number, but we want an unsigned long result */
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#ifdef CONFIG_PPC32
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static inline unsigned long of_read_ulong(const u32 *cell, int size)
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{
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return cell[size-1];
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}
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#else
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#define of_read_ulong(cell, size) of_read_number(cell, size)
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#endif
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/* Translate an OF address block into a CPU physical address
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*/
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#define OF_BAD_ADDR ((u64)-1)
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extern u64 of_translate_address(struct device_node *np, const u32 *addr);
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/* Extract an address from a device, returns the region size and
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* the address space flags too. The PCI version uses a BAR number
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* instead of an absolute index
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*/
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extern const u32 *of_get_address(struct device_node *dev, int index,
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u64 *size, unsigned int *flags);
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extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no,
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u64 *size, unsigned int *flags);
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/* Get an address as a resource. Note that if your address is
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* a PIO address, the conversion will fail if the physical address
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* can't be internally converted to an IO token with
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* pci_address_to_pio(), that is because it's either called to early
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* or it can't be matched to any host bridge IO space
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*/
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extern int of_address_to_resource(struct device_node *dev, int index,
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struct resource *r);
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extern int of_pci_address_to_resource(struct device_node *dev, int bar,
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struct resource *r);
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/* Parse the ibm,dma-window property of an OF node into the busno, phys and
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* size parameters.
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*/
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void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
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unsigned long *busno, unsigned long *phys, unsigned long *size);
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extern void kdump_move_device_tree(void);
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/* CPU OF node matching */
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struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
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/*
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* OF interrupt mapping
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*/
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/* This structure is returned when an interrupt is mapped. The controller
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* field needs to be put() after use
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*/
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#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */
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struct of_irq {
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struct device_node *controller; /* Interrupt controller node */
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u32 size; /* Specifier size */
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u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
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};
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/**
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* of_irq_map_init - Initialize the irq remapper
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* @flags: flags defining workarounds to enable
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*
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* Some machines have bugs in the device-tree which require certain workarounds
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* to be applied. Call this before any interrupt mapping attempts to enable
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* those workarounds.
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*/
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#define OF_IMAP_OLDWORLD_MAC 0x00000001
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#define OF_IMAP_NO_PHANDLE 0x00000002
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extern void of_irq_map_init(unsigned int flags);
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/**
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* of_irq_map_raw - Low level interrupt tree parsing
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* @parent: the device interrupt parent
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* @intspec: interrupt specifier ("interrupts" property of the device)
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* @ointsize: size of the passed in interrupt specifier
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* @addr: address specifier (start of "reg" property of the device)
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* @out_irq: structure of_irq filled by this function
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*
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* Returns 0 on success and a negative number on error
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*
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* This function is a low-level interrupt tree walking function. It
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* can be used to do a partial walk with synthetized reg and interrupts
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* properties, for example when resolving PCI interrupts when no device
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* node exist for the parent.
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*
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*/
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extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
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u32 ointsize, const u32 *addr,
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struct of_irq *out_irq);
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/**
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* of_irq_map_one - Resolve an interrupt for a device
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* @device: the device whose interrupt is to be resolved
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* @index: index of the interrupt to resolve
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* @out_irq: structure of_irq filled by this function
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*
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* This function resolves an interrupt, walking the tree, for a given
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* device-tree node. It's the high level pendant to of_irq_map_raw().
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* It also implements the workarounds for OldWolrd Macs.
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*/
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extern int of_irq_map_one(struct device_node *device, int index,
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struct of_irq *out_irq);
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/**
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* of_irq_map_pci - Resolve the interrupt for a PCI device
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* @pdev: the device whose interrupt is to be resolved
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* @out_irq: structure of_irq filled by this function
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*
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* This function resolves the PCI interrupt for a given PCI device. If a
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* device-node exists for a given pci_dev, it will use normal OF tree
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* walking. If not, it will implement standard swizzling and walk up the
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* PCI tree until an device-node is found, at which point it will finish
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* resolving using the OF tree walking.
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*/
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struct pci_dev;
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extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq);
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#endif /* __KERNEL__ */
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#endif /* _POWERPC_PROM_H */
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