Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / lib / libfdt / fdt.c

diff --git a/qemu/roms/u-boot/lib/libfdt/fdt.c b/qemu/roms/u-boot/lib/libfdt/fdt.c
new file mode 100644 (file)
index 0000000..e146aba
--- /dev/null
+++ b/qemu/roms/u-boot/lib/libfdt/fdt.c
@@ -0,0 +1,209 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ * SPDX-License-Identifier:    GPL-2.0+ BSD-2-Clause
+ */
+#include "libfdt_env.h"
+
+#ifndef USE_HOSTCC
+#include <fdt.h>
+#include <libfdt.h>
+#else
+#include "fdt_host.h"
+#endif
+
+#include "libfdt_internal.h"
+
+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;
+}
+
+const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
+{
+       const char *p;
+
+       if (fdt_version(fdt) >= 0x11)
+               if (((offset + len) < offset)
+                   || ((offset + len) > fdt_size_dt_struct(fdt)))
+                       return NULL;
+
+       p = _fdt_offset_ptr(fdt, offset);
+
+       if (p + len < p)
+               return NULL;
+       return p;
+}
+
+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;
+}
+
+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;
+
+       return 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;
+
+       return offset;
+}
+
+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 fdt_first_subnode(const void *fdt, int offset)
+{
+       int depth = 0;
+
+       offset = fdt_next_node(fdt, offset, &depth);
+       if (offset < 0 || depth != 1)
+               return -FDT_ERR_NOTFOUND;
+
+       return 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;
+}
+
+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 fdt_move(const void *fdt, void *buf, int bufsize)
+{
+       FDT_CHECK_HEADER(fdt);
+
+       if (fdt_totalsize(fdt) > bufsize)
+               return -FDT_ERR_NOSPACE;
+
+       memmove(buf, fdt, fdt_totalsize(fdt));
+       return 0;
+}