a9ec7669fc
Most of ft_get_parent() is factored out into __ft_get_parent(), which deals only in internal node pointers. The ft_get_parent() wrapper handles phandle conversion in both directions (previously, ft_get_parent() did not convert its return value). It also now returns NULL as the parent of the toplevel node, rather than just returning the toplevel node again (which made it rather useless in loops). Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
110 lines
3.8 KiB
C
110 lines
3.8 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_device_rel(struct ft_cxt *cxt, const void *top,
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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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void *ft_get_parent(struct ft_cxt *cxt, const void *phandle);
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#endif /* FLATDEVTREE_H */
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