6fb4efc68f
Add the latest version of the flatdevtree code and corresponding glue. A phandle table now tracks values returned by ft_find_device(). The value returned by ft_find_device() is a phandle which is really an index into the phandle table. The phandle table contains the address of the corresponding node. When the flat dt is edited/moved, the node pointers in the phandle table are updated accordingly so no phandles kept by the caller become stale. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef FLATDEVTREE_H
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#define FLATDEVTREE_H
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#include "flatdevtree_env.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, 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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struct boot_param_header {
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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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struct ft_reserve {
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u64 start;
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u64 len;
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};
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struct ft_region {
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char *start;
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unsigned long size;
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};
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enum ft_rgn_id {
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FT_RSVMAP,
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FT_STRUCT,
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FT_STRINGS,
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FT_N_REGION
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};
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#define FT_MAX_DEPTH 50
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struct ft_cxt {
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struct boot_param_header *bph;
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int max_size; /* maximum size of tree */
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int isordered; /* everything in standard order */
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void *(*realloc)(void *, unsigned long);
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char *str_anchor;
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char *p; /* current insertion point in structs */
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struct ft_region rgn[FT_N_REGION];
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void *genealogy[FT_MAX_DEPTH+1];
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char **node_tbl;
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unsigned int node_max;
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unsigned int nodes_used;
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};
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int ft_begin_node(struct ft_cxt *cxt, const char *name);
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void ft_end_node(struct ft_cxt *cxt);
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void ft_begin_tree(struct ft_cxt *cxt);
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void ft_end_tree(struct ft_cxt *cxt);
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void ft_nop(struct ft_cxt *cxt);
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int ft_prop(struct ft_cxt *cxt, const char *name,
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const void *data, unsigned int sz);
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int ft_prop_str(struct ft_cxt *cxt, const char *name, const char *str);
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int ft_prop_int(struct ft_cxt *cxt, const char *name, unsigned int val);
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void ft_begin(struct ft_cxt *cxt, void *blob, unsigned int max_size,
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void *(*realloc_fn)(void *, unsigned long));
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int ft_open(struct ft_cxt *cxt, void *blob, unsigned int max_size,
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unsigned int max_find_device,
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void *(*realloc_fn)(void *, unsigned long));
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int ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size);
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void ft_dump_blob(const void *bphp);
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void ft_merge_blob(struct ft_cxt *cxt, void *blob);
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void *ft_find_device(struct ft_cxt *cxt, const char *srch_path);
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void *ft_find_descendent(struct ft_cxt *cxt, void *top, const char *srch_path);
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int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
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void *buf, const unsigned int buflen);
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int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
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const void *buf, const unsigned int buflen);
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#endif /* FLATDEVTREE_H */
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