--- /dev/null
+/*
+ * 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_setprop_inplace(void *fdt, int nodeoffset, const char *name,
+ const void *val, int len)
+{
+ void *propval;
+ int proplen;
+
+ propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen);
+ if (! propval)
+ return proplen;
+
+ if (proplen != len)
+ return -FDT_ERR_NOSPACE;
+
+ memcpy(propval, val, len);
+ return 0;
+}
+
+static void _fdt_nop_region(void *start, int len)
+{
+ fdt32_t *p;
+
+ for (p = start; (char *)p < ((char *)start + len); p++)
+ *p = cpu_to_fdt32(FDT_NOP);
+}
+
+int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
+{
+ struct fdt_property *prop;
+ int len;
+
+ prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
+ if (! prop)
+ return len;
+
+ _fdt_nop_region(prop, len + sizeof(*prop));
+
+ return 0;
+}
+
+int _fdt_node_end_offset(void *fdt, int offset)
+{
+ int depth = 0;
+
+ while ((offset >= 0) && (depth >= 0))
+ offset = fdt_next_node(fdt, offset, &depth);
+
+ return offset;
+}
+
+int fdt_nop_node(void *fdt, int nodeoffset)
+{
+ int endoffset;
+
+ endoffset = _fdt_node_end_offset(fdt, nodeoffset);
+ if (endoffset < 0)
+ return endoffset;
+
+ _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0),
+ endoffset - nodeoffset);
+ return 0;
+}
+
+#define FDT_MAX_DEPTH 32
+
+static int str_in_list(const char *str, char * const list[], int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ if (!strcmp(list[i], str))
+ return 1;
+
+ return 0;
+}
+
+int fdt_find_regions(const void *fdt, char * const inc[], int inc_count,
+ char * const exc_prop[], int exc_prop_count,
+ struct fdt_region region[], int max_regions,
+ char *path, int path_len, int add_string_tab)
+{
+ int stack[FDT_MAX_DEPTH];
+ char *end;
+ int nextoffset = 0;
+ uint32_t tag;
+ int count = 0;
+ int start = -1;
+ int depth = -1;
+ int want = 0;
+ int base = fdt_off_dt_struct(fdt);
+
+ end = path;
+ *end = '\0';
+ do {
+ const struct fdt_property *prop;
+ const char *name;
+ const char *str;
+ int include = 0;
+ int stop_at = 0;
+ int offset;
+ int len;
+
+ offset = nextoffset;
+ tag = fdt_next_tag(fdt, offset, &nextoffset);
+ stop_at = nextoffset;
+
+ switch (tag) {
+ case FDT_PROP:
+ include = want >= 2;
+ stop_at = offset;
+ prop = fdt_get_property_by_offset(fdt, offset, NULL);
+ str = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
+ if (str_in_list(str, exc_prop, exc_prop_count))
+ include = 0;
+ break;
+
+ case FDT_NOP:
+ include = want >= 2;
+ stop_at = offset;
+ break;
+
+ case FDT_BEGIN_NODE:
+ depth++;
+ if (depth == FDT_MAX_DEPTH)
+ return -FDT_ERR_BADSTRUCTURE;
+ name = fdt_get_name(fdt, offset, &len);
+ if (end - path + 2 + len >= path_len)
+ return -FDT_ERR_NOSPACE;
+ if (end != path + 1)
+ *end++ = '/';
+ strcpy(end, name);
+ end += len;
+ stack[depth] = want;
+ if (want == 1)
+ stop_at = offset;
+ if (str_in_list(path, inc, inc_count))
+ want = 2;
+ else if (want)
+ want--;
+ else
+ stop_at = offset;
+ include = want;
+ break;
+
+ case FDT_END_NODE:
+ include = want;
+ want = stack[depth--];
+ while (end > path && *--end != '/')
+ ;
+ *end = '\0';
+ break;
+
+ case FDT_END:
+ include = 1;
+ break;
+ }
+
+ if (include && start == -1) {
+ /* Should we merge with previous? */
+ if (count && count <= max_regions &&
+ offset == region[count - 1].offset +
+ region[count - 1].size - base)
+ start = region[--count].offset - base;
+ else
+ start = offset;
+ }
+
+ if (!include && start != -1) {
+ if (count < max_regions) {
+ region[count].offset = base + start;
+ region[count].size = stop_at - start;
+ }
+ count++;
+ start = -1;
+ }
+ } while (tag != FDT_END);
+
+ if (nextoffset != fdt_size_dt_struct(fdt))
+ return -FDT_ERR_BADLAYOUT;
+
+ /* Add a region for the END tag and the string table */
+ if (count < max_regions) {
+ region[count].offset = base + start;
+ region[count].size = nextoffset - start;
+ if (add_string_tab)
+ region[count].size += fdt_size_dt_strings(fdt);
+ }
+ count++;
+
+ return count;
+}
Code Review / kvmfornfv.git / blobdiff