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-rw-r--r--scripts/dtc/treesource.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/scripts/dtc/treesource.c b/scripts/dtc/treesource.c
new file mode 100644
index 000000000..061ba8c9c
--- /dev/null
+++ b/scripts/dtc/treesource.c
@@ -0,0 +1,345 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ */
+
+#include "dtc.h"
+#include "srcpos.h"
+
+extern FILE *yyin;
+extern int yyparse(void);
+extern YYLTYPE yylloc;
+
+struct dt_info *parser_output;
+bool treesource_error;
+
+struct dt_info *dt_from_source(const char *fname)
+{
+ parser_output = NULL;
+ treesource_error = false;
+
+ srcfile_push(fname);
+ yyin = current_srcfile->f;
+ yylloc.file = current_srcfile;
+
+ if (yyparse() != 0)
+ die("Unable to parse input tree\n");
+
+ if (treesource_error)
+ die("Syntax error parsing input tree\n");
+
+ return parser_output;
+}
+
+static void write_prefix(FILE *f, int level)
+{
+ int i;
+
+ for (i = 0; i < level; i++)
+ fputc('\t', f);
+}
+
+static bool isstring(char c)
+{
+ return (isprint((unsigned char)c)
+ || (c == '\0')
+ || strchr("\a\b\t\n\v\f\r", c));
+}
+
+static void write_propval_string(FILE *f, const char *s, size_t len)
+{
+ const char *end = s + len - 1;
+
+ if (!len)
+ return;
+
+ assert(*end == '\0');
+
+ fprintf(f, "\"");
+ while (s < end) {
+ char c = *s++;
+ switch (c) {
+ case '\a':
+ fprintf(f, "\\a");
+ break;
+ case '\b':
+ fprintf(f, "\\b");
+ break;
+ case '\t':
+ fprintf(f, "\\t");
+ break;
+ case '\n':
+ fprintf(f, "\\n");
+ break;
+ case '\v':
+ fprintf(f, "\\v");
+ break;
+ case '\f':
+ fprintf(f, "\\f");
+ break;
+ case '\r':
+ fprintf(f, "\\r");
+ break;
+ case '\\':
+ fprintf(f, "\\\\");
+ break;
+ case '\"':
+ fprintf(f, "\\\"");
+ break;
+ case '\0':
+ fprintf(f, "\\0");
+ break;
+ default:
+ if (isprint((unsigned char)c))
+ fprintf(f, "%c", c);
+ else
+ fprintf(f, "\\x%02"PRIx8, c);
+ }
+ }
+ fprintf(f, "\"");
+}
+
+static void write_propval_int(FILE *f, const char *p, size_t len, size_t width)
+{
+ const char *end = p + len;
+ assert(len % width == 0);
+
+ for (; p < end; p += width) {
+ switch (width) {
+ case 1:
+ fprintf(f, "%02"PRIx8, *(const uint8_t*)p);
+ break;
+ case 2:
+ fprintf(f, "0x%02"PRIx16, dtb_ld16(p));
+ break;
+ case 4:
+ fprintf(f, "0x%02"PRIx32, dtb_ld32(p));
+ break;
+ case 8:
+ fprintf(f, "0x%02"PRIx64, dtb_ld64(p));
+ break;
+ }
+ if (p + width < end)
+ fputc(' ', f);
+ }
+}
+
+static bool has_data_type_information(struct marker *m)
+{
+ return m->type >= TYPE_UINT8;
+}
+
+static struct marker *next_type_marker(struct marker *m)
+{
+ while (m && !has_data_type_information(m))
+ m = m->next;
+ return m;
+}
+
+size_t type_marker_length(struct marker *m)
+{
+ struct marker *next = next_type_marker(m->next);
+
+ if (next)
+ return next->offset - m->offset;
+ return 0;
+}
+
+static const char *delim_start[] = {
+ [TYPE_UINT8] = "[",
+ [TYPE_UINT16] = "/bits/ 16 <",
+ [TYPE_UINT32] = "<",
+ [TYPE_UINT64] = "/bits/ 64 <",
+ [TYPE_STRING] = "",
+};
+static const char *delim_end[] = {
+ [TYPE_UINT8] = "]",
+ [TYPE_UINT16] = ">",
+ [TYPE_UINT32] = ">",
+ [TYPE_UINT64] = ">",
+ [TYPE_STRING] = "",
+};
+
+static enum markertype guess_value_type(struct property *prop)
+{
+ int len = prop->val.len;
+ const char *p = prop->val.val;
+ struct marker *m = prop->val.markers;
+ int nnotstring = 0, nnul = 0;
+ int nnotstringlbl = 0, nnotcelllbl = 0;
+ int i;
+
+ for (i = 0; i < len; i++) {
+ if (! isstring(p[i]))
+ nnotstring++;
+ if (p[i] == '\0')
+ nnul++;
+ }
+
+ for_each_marker_of_type(m, LABEL) {
+ if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
+ nnotstringlbl++;
+ if ((m->offset % sizeof(cell_t)) != 0)
+ nnotcelllbl++;
+ }
+
+ if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul <= (len-nnul))
+ && (nnotstringlbl == 0)) {
+ return TYPE_STRING;
+ } else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
+ return TYPE_UINT32;
+ }
+
+ return TYPE_UINT8;
+}
+
+static void write_propval(FILE *f, struct property *prop)
+{
+ size_t len = prop->val.len;
+ struct marker *m = prop->val.markers;
+ struct marker dummy_marker;
+ enum markertype emit_type = TYPE_NONE;
+ char *srcstr;
+
+ if (len == 0) {
+ fprintf(f, ";");
+ if (annotate) {
+ srcstr = srcpos_string_first(prop->srcpos, annotate);
+ if (srcstr) {
+ fprintf(f, " /* %s */", srcstr);
+ free(srcstr);
+ }
+ }
+ fprintf(f, "\n");
+ return;
+ }
+
+ fprintf(f, " =");
+
+ if (!next_type_marker(m)) {
+ /* data type information missing, need to guess */
+ dummy_marker.type = guess_value_type(prop);
+ dummy_marker.next = prop->val.markers;
+ dummy_marker.offset = 0;
+ dummy_marker.ref = NULL;
+ m = &dummy_marker;
+ }
+
+ for_each_marker(m) {
+ size_t chunk_len = (m->next ? m->next->offset : len) - m->offset;
+ size_t data_len = type_marker_length(m) ? : len - m->offset;
+ const char *p = &prop->val.val[m->offset];
+
+ if (has_data_type_information(m)) {
+ emit_type = m->type;
+ fprintf(f, " %s", delim_start[emit_type]);
+ } else if (m->type == LABEL)
+ fprintf(f, " %s:", m->ref);
+ else if (m->offset)
+ fputc(' ', f);
+
+ if (emit_type == TYPE_NONE) {
+ assert(chunk_len == 0);
+ continue;
+ }
+
+ switch(emit_type) {
+ case TYPE_UINT16:
+ write_propval_int(f, p, chunk_len, 2);
+ break;
+ case TYPE_UINT32:
+ write_propval_int(f, p, chunk_len, 4);
+ break;
+ case TYPE_UINT64:
+ write_propval_int(f, p, chunk_len, 8);
+ break;
+ case TYPE_STRING:
+ write_propval_string(f, p, chunk_len);
+ break;
+ default:
+ write_propval_int(f, p, chunk_len, 1);
+ }
+
+ if (chunk_len == data_len) {
+ size_t pos = m->offset + chunk_len;
+ fprintf(f, pos == len ? "%s" : "%s,",
+ delim_end[emit_type] ? : "");
+ emit_type = TYPE_NONE;
+ }
+ }
+ fprintf(f, ";");
+ if (annotate) {
+ srcstr = srcpos_string_first(prop->srcpos, annotate);
+ if (srcstr) {
+ fprintf(f, " /* %s */", srcstr);
+ free(srcstr);
+ }
+ }
+ fprintf(f, "\n");
+}
+
+static void write_tree_source_node(FILE *f, struct node *tree, int level)
+{
+ struct property *prop;
+ struct node *child;
+ struct label *l;
+ char *srcstr;
+
+ write_prefix(f, level);
+ for_each_label(tree->labels, l)
+ fprintf(f, "%s: ", l->label);
+ if (tree->name && (*tree->name))
+ fprintf(f, "%s {", tree->name);
+ else
+ fprintf(f, "/ {");
+
+ if (annotate) {
+ srcstr = srcpos_string_first(tree->srcpos, annotate);
+ if (srcstr) {
+ fprintf(f, " /* %s */", srcstr);
+ free(srcstr);
+ }
+ }
+ fprintf(f, "\n");
+
+ for_each_property(tree, prop) {
+ write_prefix(f, level+1);
+ for_each_label(prop->labels, l)
+ fprintf(f, "%s: ", l->label);
+ fprintf(f, "%s", prop->name);
+ write_propval(f, prop);
+ }
+ for_each_child(tree, child) {
+ fprintf(f, "\n");
+ write_tree_source_node(f, child, level+1);
+ }
+ write_prefix(f, level);
+ fprintf(f, "};");
+ if (annotate) {
+ srcstr = srcpos_string_last(tree->srcpos, annotate);
+ if (srcstr) {
+ fprintf(f, " /* %s */", srcstr);
+ free(srcstr);
+ }
+ }
+ fprintf(f, "\n");
+}
+
+void dt_to_source(FILE *f, struct dt_info *dti)
+{
+ struct reserve_info *re;
+
+ fprintf(f, "/dts-v1/;\n\n");
+
+ for (re = dti->reservelist; re; re = re->next) {
+ struct label *l;
+
+ for_each_label(re->labels, l)
+ fprintf(f, "%s: ", l->label);
+ fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
+ (unsigned long long)re->address,
+ (unsigned long long)re->size);
+ }
+
+ write_tree_source_node(f, dti->dt, 0);
+}
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