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[POWERPC] Add flatdevtree source

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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>
This commit is contained in:
Mark A. Greer
2006-10-16 13:50:05 -07:00
committed by Paul Mackerras
parent c888554bf9
commit 6fb4efc68f
5 changed files with 1046 additions and 2 deletions
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62
arch/powerpc/boot/flatdevtree.h
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@@ -17,7 +17,7 @@
#ifndef FLATDEVTREE_H
#define FLATDEVTREE_H
#include "types.h"
#include "flatdevtree_env.h"
/* Definitions used by the flattened device tree */
#define OF_DT_HEADER 0xd00dfeed /* marker */
@@ -43,4 +43,64 @@ struct boot_param_header {
u32 dt_strings_size; /* size of the DT strings block */
};
struct ft_reserve {
u64 start;
u64 len;
};
struct ft_region {
char *start;
unsigned long size;
};
enum ft_rgn_id {
FT_RSVMAP,
FT_STRUCT,
FT_STRINGS,
FT_N_REGION
};
#define FT_MAX_DEPTH 50
struct ft_cxt {
struct boot_param_header *bph;
int max_size; /* maximum size of tree */
int isordered; /* everything in standard order */
void *(*realloc)(void *, unsigned long);
char *str_anchor;
char *p; /* current insertion point in structs */
struct ft_region rgn[FT_N_REGION];
void *genealogy[FT_MAX_DEPTH+1];
char **node_tbl;
unsigned int node_max;
unsigned int nodes_used;
};
int ft_begin_node(struct ft_cxt *cxt, const char *name);
void ft_end_node(struct ft_cxt *cxt);
void ft_begin_tree(struct ft_cxt *cxt);
void ft_end_tree(struct ft_cxt *cxt);
void ft_nop(struct ft_cxt *cxt);
int ft_prop(struct ft_cxt *cxt, const char *name,
const void *data, unsigned int sz);
int ft_prop_str(struct ft_cxt *cxt, const char *name, const char *str);
int ft_prop_int(struct ft_cxt *cxt, const char *name, unsigned int val);
void ft_begin(struct ft_cxt *cxt, void *blob, unsigned int max_size,
void *(*realloc_fn)(void *, unsigned long));
int ft_open(struct ft_cxt *cxt, void *blob, unsigned int max_size,
unsigned int max_find_device,
void *(*realloc_fn)(void *, unsigned long));
int ft_add_rsvmap(struct ft_cxt *cxt, u64 physaddr, u64 size);
void ft_dump_blob(const void *bphp);
void ft_merge_blob(struct ft_cxt *cxt, void *blob);
void *ft_find_device(struct ft_cxt *cxt, const char *srch_path);
void *ft_find_descendent(struct ft_cxt *cxt, void *top, const char *srch_path);
int ft_get_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
void *buf, const unsigned int buflen);
int ft_set_prop(struct ft_cxt *cxt, const void *phandle, const char *propname,
const void *buf, const unsigned int buflen);
#endif /* FLATDEVTREE_H */