diff options
Diffstat (limited to 'EmbeddedPkg/Library/FdtLib/fdt.c')
| -rw-r--r-- | EmbeddedPkg/Library/FdtLib/fdt.c | 397 |
1 files changed, 238 insertions, 159 deletions
diff --git a/EmbeddedPkg/Library/FdtLib/fdt.c b/EmbeddedPkg/Library/FdtLib/fdt.c index 29756a8795..56a9787cd0 100644 --- a/EmbeddedPkg/Library/FdtLib/fdt.c +++ b/EmbeddedPkg/Library/FdtLib/fdt.c @@ -55,197 +55,276 @@ #include "libfdt_internal.h"
-int fdt_check_header(const void *fdt)
+int
+fdt_check_header (
+ const void *fdt
+ )
{
- if (fdt_magic(fdt) == FDT_MAGIC) {
- /* Complete tree */
- if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
- return -FDT_ERR_BADVERSION;
- if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION)
- return -FDT_ERR_BADVERSION;
- } else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
- /* Unfinished sequential-write blob */
- if (fdt_size_dt_struct(fdt) == 0)
- return -FDT_ERR_BADSTATE;
- } else {
- return -FDT_ERR_BADMAGIC;
- }
-
- return 0;
+ if (fdt_magic (fdt) == FDT_MAGIC) {
+ /* Complete tree */
+ if (fdt_version (fdt) < FDT_FIRST_SUPPORTED_VERSION) {
+ return -FDT_ERR_BADVERSION;
+ }
+
+ if (fdt_last_comp_version (fdt) > FDT_LAST_SUPPORTED_VERSION) {
+ return -FDT_ERR_BADVERSION;
+ }
+ } else if (fdt_magic (fdt) == FDT_SW_MAGIC) {
+ /* Unfinished sequential-write blob */
+ if (fdt_size_dt_struct (fdt) == 0) {
+ return -FDT_ERR_BADSTATE;
+ }
+ } else {
+ return -FDT_ERR_BADMAGIC;
+ }
+
+ return 0;
}
-const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
+const void *
+fdt_offset_ptr (
+ const void *fdt,
+ int offset,
+ unsigned int len
+ )
{
- unsigned absoffset = offset + fdt_off_dt_struct(fdt);
-
- if ((absoffset < offset)
- || ((absoffset + len) < absoffset)
- || (absoffset + len) > fdt_totalsize(fdt))
- return NULL;
-
- if (fdt_version(fdt) >= 0x11)
- if (((offset + len) < offset)
- || ((offset + len) > fdt_size_dt_struct(fdt)))
- return NULL;
-
- return _fdt_offset_ptr(fdt, offset);
+ unsigned absoffset = offset + fdt_off_dt_struct (fdt);
+
+ if ( (absoffset < offset)
+ || ((absoffset + len) < absoffset)
+ || ((absoffset + len) > fdt_totalsize (fdt)))
+ {
+ return NULL;
+ }
+
+ if (fdt_version (fdt) >= 0x11) {
+ if ( ((offset + len) < offset)
+ || ((offset + len) > fdt_size_dt_struct (fdt)))
+ {
+ return NULL;
+ }
+ }
+
+ return _fdt_offset_ptr (fdt, offset);
}
-uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
+uint32_t
+fdt_next_tag (
+ const void *fdt,
+ int startoffset,
+ int *nextoffset
+ )
{
- const fdt32_t *tagp, *lenp;
- uint32_t tag;
- int offset = startoffset;
- const char *p;
-
- *nextoffset = -FDT_ERR_TRUNCATED;
- tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);
- if (!tagp)
- return FDT_END; /* premature end */
- tag = fdt32_to_cpu(*tagp);
- offset += FDT_TAGSIZE;
-
- *nextoffset = -FDT_ERR_BADSTRUCTURE;
- switch (tag) {
- case FDT_BEGIN_NODE:
- /* skip name */
- do {
- p = fdt_offset_ptr(fdt, offset++, 1);
- } while (p && (*p != '\0'));
- if (!p)
- return FDT_END; /* premature end */
- break;
-
- case FDT_PROP:
- lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
- if (!lenp)
- return FDT_END; /* premature end */
- /* skip-name offset, length and value */
- offset += sizeof(struct fdt_property) - FDT_TAGSIZE
- + fdt32_to_cpu(*lenp);
- break;
-
- case FDT_END:
- case FDT_END_NODE:
- case FDT_NOP:
- break;
-
- default:
- return FDT_END;
- }
-
- if (!fdt_offset_ptr(fdt, startoffset, offset - startoffset))
- return FDT_END; /* premature end */
-
- *nextoffset = FDT_TAGALIGN(offset);
- return tag;
+ const fdt32_t *tagp, *lenp;
+ uint32_t tag;
+ int offset = startoffset;
+ const char *p;
+
+ *nextoffset = -FDT_ERR_TRUNCATED;
+ tagp = fdt_offset_ptr (fdt, offset, FDT_TAGSIZE);
+ if (!tagp) {
+ return FDT_END; /* premature end */
+ }
+
+ tag = fdt32_to_cpu (*tagp);
+ offset += FDT_TAGSIZE;
+
+ *nextoffset = -FDT_ERR_BADSTRUCTURE;
+ switch (tag) {
+ case FDT_BEGIN_NODE:
+ /* skip name */
+ do {
+ p = fdt_offset_ptr (fdt, offset++, 1);
+ } while (p && (*p != '\0'));
+
+ if (!p) {
+ return FDT_END; /* premature end */
+ }
+
+ break;
+
+ case FDT_PROP:
+ lenp = fdt_offset_ptr (fdt, offset, sizeof (*lenp));
+ if (!lenp) {
+ return FDT_END; /* premature end */
+ }
+
+ /* skip-name offset, length and value */
+ offset += sizeof (struct fdt_property) - FDT_TAGSIZE
+ + fdt32_to_cpu (*lenp);
+ break;
+
+ case FDT_END:
+ case FDT_END_NODE:
+ case FDT_NOP:
+ break;
+
+ default:
+ return FDT_END;
+ }
+
+ if (!fdt_offset_ptr (fdt, startoffset, offset - startoffset)) {
+ return FDT_END; /* premature end */
+ }
+
+ *nextoffset = FDT_TAGALIGN (offset);
+ return tag;
}
-int _fdt_check_node_offset(const void *fdt, int offset)
+int
+_fdt_check_node_offset (
+ const void *fdt,
+ int offset
+ )
{
- if ((offset < 0) || (offset % FDT_TAGSIZE)
- || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))
- return -FDT_ERR_BADOFFSET;
+ if ( (offset < 0) || (offset % FDT_TAGSIZE)
+ || (fdt_next_tag (fdt, offset, &offset) != FDT_BEGIN_NODE))
+ {
+ return -FDT_ERR_BADOFFSET;
+ }
- return offset;
+ return offset;
}
-int _fdt_check_prop_offset(const void *fdt, int offset)
+int
+_fdt_check_prop_offset (
+ const void *fdt,
+ int offset
+ )
{
- if ((offset < 0) || (offset % FDT_TAGSIZE)
- || (fdt_next_tag(fdt, offset, &offset) != FDT_PROP))
- return -FDT_ERR_BADOFFSET;
+ if ( (offset < 0) || (offset % FDT_TAGSIZE)
+ || (fdt_next_tag (fdt, offset, &offset) != FDT_PROP))
+ {
+ return -FDT_ERR_BADOFFSET;
+ }
- return offset;
+ return offset;
}
-int fdt_next_node(const void *fdt, int offset, int *depth)
+int
+fdt_next_node (
+ const void *fdt,
+ int offset,
+ int *depth
+ )
{
- int nextoffset = 0;
- uint32_t tag;
-
- if (offset >= 0)
- if ((nextoffset = _fdt_check_node_offset(fdt, offset)) < 0)
- return nextoffset;
-
- do {
- offset = nextoffset;
- tag = fdt_next_tag(fdt, offset, &nextoffset);
-
- switch (tag) {
- case FDT_PROP:
- case FDT_NOP:
- break;
-
- case FDT_BEGIN_NODE:
- if (depth)
- (*depth)++;
- break;
-
- case FDT_END_NODE:
- if (depth && ((--(*depth)) < 0))
- return nextoffset;
- break;
-
- case FDT_END:
- if ((nextoffset >= 0)
- || ((nextoffset == -FDT_ERR_TRUNCATED) && !depth))
- return -FDT_ERR_NOTFOUND;
- else
- return nextoffset;
- }
- } while (tag != FDT_BEGIN_NODE);
-
- return offset;
+ int nextoffset = 0;
+ uint32_t tag;
+
+ if (offset >= 0) {
+ if ((nextoffset = _fdt_check_node_offset (fdt, offset)) < 0) {
+ return nextoffset;
+ }
+ }
+
+ do {
+ offset = nextoffset;
+ tag = fdt_next_tag (fdt, offset, &nextoffset);
+
+ switch (tag) {
+ case FDT_PROP:
+ case FDT_NOP:
+ break;
+
+ case FDT_BEGIN_NODE:
+ if (depth) {
+ (*depth)++;
+ }
+
+ break;
+
+ case FDT_END_NODE:
+ if (depth && ((--(*depth)) < 0)) {
+ return nextoffset;
+ }
+
+ break;
+
+ case FDT_END:
+ if ( (nextoffset >= 0)
+ || ((nextoffset == -FDT_ERR_TRUNCATED) && !depth))
+ {
+ return -FDT_ERR_NOTFOUND;
+ } else {
+ return nextoffset;
+ }
+ }
+ } while (tag != FDT_BEGIN_NODE);
+
+ return offset;
}
-int fdt_first_subnode(const void *fdt, int offset)
+int
+fdt_first_subnode (
+ const void *fdt,
+ int offset
+ )
{
- int depth = 0;
+ int depth = 0;
- offset = fdt_next_node(fdt, offset, &depth);
- if (offset < 0 || depth != 1)
- return -FDT_ERR_NOTFOUND;
+ offset = fdt_next_node (fdt, offset, &depth);
+ if ((offset < 0) || (depth != 1)) {
+ return -FDT_ERR_NOTFOUND;
+ }
- return offset;
+ return offset;
}
-int fdt_next_subnode(const void *fdt, int offset)
+int
+fdt_next_subnode (
+ const void *fdt,
+ int offset
+ )
{
- int depth = 1;
-
- /*
- * With respect to the parent, the depth of the next subnode will be
- * the same as the last.
- */
- do {
- offset = fdt_next_node(fdt, offset, &depth);
- if (offset < 0 || depth < 1)
- return -FDT_ERR_NOTFOUND;
- } while (depth > 1);
-
- return offset;
+ int depth = 1;
+
+ /*
+ * With respect to the parent, the depth of the next subnode will be
+ * the same as the last.
+ */
+ do {
+ offset = fdt_next_node (fdt, offset, &depth);
+ if ((offset < 0) || (depth < 1)) {
+ return -FDT_ERR_NOTFOUND;
+ }
+ } while (depth > 1);
+
+ return offset;
}
-const char *_fdt_find_string(const char *strtab, int tabsize, const char *s)
+const char *
+_fdt_find_string (
+ const char *strtab,
+ int tabsize,
+ const char *s
+ )
{
- int len = strlen(s) + 1;
- const char *last = strtab + tabsize - len;
- const char *p;
-
- for (p = strtab; p <= last; p++)
- if (memcmp(p, s, len) == 0)
- return p;
- return NULL;
+ int len = strlen (s) + 1;
+ const char *last = strtab + tabsize - len;
+ const char *p;
+
+ for (p = strtab; p <= last; p++) {
+ if (memcmp (p, s, len) == 0) {
+ return p;
+ }
+ }
+
+ return NULL;
}
-int fdt_move(const void *fdt, void *buf, int bufsize)
+int
+fdt_move (
+ const void *fdt,
+ void *buf,
+ int bufsize
+ )
{
- FDT_CHECK_HEADER(fdt);
+ FDT_CHECK_HEADER (fdt);
- if (fdt_totalsize(fdt) > bufsize)
- return -FDT_ERR_NOSPACE;
+ if (fdt_totalsize (fdt) > bufsize) {
+ return -FDT_ERR_NOSPACE;
+ }
- memmove(buf, fdt, fdt_totalsize(fdt));
- return 0;
+ memmove (buf, fdt, fdt_totalsize (fdt));
+ return 0;
}
|