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dtc: Plugin and fixup support

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This patch enable the generation of symbols & local fixup information
for trees compiled with the -@ (--symbols) option.

Using this patch labels in the tree and their users emit information
in __symbols__ and __local_fixups__ nodes.

The __fixups__ node make possible the dynamic resolution of phandle
references which are present in the plugin tree but lie in the
tree that are applying the overlay against.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Pantelis Antoniou 2016-12-07 14:48:18 +02:00 • committed by David Gibson
parent a2c92cac53
commit 20f29d8d41
9 changed files with 373 additions and 11 deletions
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16
dtc.h
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@ -55,6 +55,9 @@ extern int minsize; /* Minimum blob size */
extern int padsize; /* Additional padding to blob */
extern int alignsize; /* Additional padding to blob accroding to the alignsize */
extern int phandle_format; /* Use linux,phandle or phandle properties */
extern int generate_symbols; /* generate symbols for nodes with labels */
extern int generate_fixups; /* generate fixups */
extern int auto_label_aliases; /* auto generate labels -> aliases */
#define PHANDLE_LEGACY 0x1
#define PHANDLE_EPAPR 0x2
@ -202,6 +205,8 @@ void delete_property(struct property *prop);
void add_child(struct node *parent, struct node *child);
void delete_node_by_name(struct node *parent, char *name);
void delete_node(struct node *node);
void append_to_property(struct node *node,
char *name, const void *data, int len);
const char *get_unitname(struct node *node);
struct property *get_property(struct node *node, const char *propname);
@ -237,14 +242,23 @@ struct reserve_info *add_reserve_entry(struct reserve_info *list,
struct boot_info {
unsigned int dtsflags;
struct reserve_info *reservelist;
struct node *dt; /* the device tree */
uint32_t boot_cpuid_phys;
};
struct boot_info *build_boot_info(struct reserve_info *reservelist,
/* DTS version flags definitions */
#define DTSF_V1 0x0001 /* /dts-v1/ */
#define DTSF_PLUGIN 0x0002 /* /plugin/ */
struct boot_info *build_boot_info(unsigned int dtsflags,
struct reserve_info *reservelist,
struct node *tree, uint32_t boot_cpuid_phys);
void sort_tree(struct boot_info *bi);
void generate_label_tree(struct boot_info *bi, char *name, bool allocph);
void generate_fixups_tree(struct boot_info *bi, char *name);
void generate_local_fixups_tree(struct boot_info *bi, char *name);
/* Checks */