mirror of https://gitee.com/openkylin/linux.git
346 lines
6.9 KiB
C
346 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
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*/
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#include "dtc.h"
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#include "srcpos.h"
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extern FILE *yyin;
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extern int yyparse(void);
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extern YYLTYPE yylloc;
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struct dt_info *parser_output;
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bool treesource_error;
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struct dt_info *dt_from_source(const char *fname)
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{
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parser_output = NULL;
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treesource_error = false;
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srcfile_push(fname);
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yyin = current_srcfile->f;
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yylloc.file = current_srcfile;
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if (yyparse() != 0)
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die("Unable to parse input tree\n");
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if (treesource_error)
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die("Syntax error parsing input tree\n");
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return parser_output;
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}
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static void write_prefix(FILE *f, int level)
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{
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int i;
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for (i = 0; i < level; i++)
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fputc('\t', f);
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}
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static bool isstring(char c)
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{
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return (isprint((unsigned char)c)
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|| (c == '\0')
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|| strchr("\a\b\t\n\v\f\r", c));
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}
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static void write_propval_string(FILE *f, const char *s, size_t len)
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{
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const char *end = s + len - 1;
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if (!len)
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return;
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assert(*end == '\0');
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fprintf(f, "\"");
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while (s < end) {
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char c = *s++;
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switch (c) {
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case '\a':
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fprintf(f, "\\a");
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break;
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case '\b':
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fprintf(f, "\\b");
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break;
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case '\t':
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fprintf(f, "\\t");
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break;
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case '\n':
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fprintf(f, "\\n");
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break;
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case '\v':
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fprintf(f, "\\v");
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break;
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case '\f':
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fprintf(f, "\\f");
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break;
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case '\r':
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fprintf(f, "\\r");
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break;
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case '\\':
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fprintf(f, "\\\\");
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break;
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case '\"':
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fprintf(f, "\\\"");
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break;
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case '\0':
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fprintf(f, "\\0");
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break;
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default:
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if (isprint((unsigned char)c))
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fprintf(f, "%c", c);
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else
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fprintf(f, "\\x%02"PRIx8, c);
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}
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}
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fprintf(f, "\"");
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}
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static void write_propval_int(FILE *f, const char *p, size_t len, size_t width)
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{
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const char *end = p + len;
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assert(len % width == 0);
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for (; p < end; p += width) {
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switch (width) {
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case 1:
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fprintf(f, "%02"PRIx8, *(const uint8_t*)p);
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break;
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case 2:
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fprintf(f, "0x%02"PRIx16, fdt16_to_cpu(*(const fdt16_t*)p));
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break;
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case 4:
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fprintf(f, "0x%02"PRIx32, fdt32_to_cpu(*(const fdt32_t*)p));
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break;
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case 8:
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fprintf(f, "0x%02"PRIx64, fdt64_to_cpu(*(const fdt64_t*)p));
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break;
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}
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if (p + width < end)
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fputc(' ', f);
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}
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}
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static bool has_data_type_information(struct marker *m)
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{
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return m->type >= TYPE_UINT8;
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}
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static struct marker *next_type_marker(struct marker *m)
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{
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while (m && !has_data_type_information(m))
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m = m->next;
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return m;
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}
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size_t type_marker_length(struct marker *m)
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{
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struct marker *next = next_type_marker(m->next);
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if (next)
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return next->offset - m->offset;
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return 0;
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}
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static const char *delim_start[] = {
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[TYPE_UINT8] = "[",
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[TYPE_UINT16] = "/bits/ 16 <",
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[TYPE_UINT32] = "<",
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[TYPE_UINT64] = "/bits/ 64 <",
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[TYPE_STRING] = "",
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};
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static const char *delim_end[] = {
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[TYPE_UINT8] = "]",
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[TYPE_UINT16] = ">",
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[TYPE_UINT32] = ">",
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[TYPE_UINT64] = ">",
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[TYPE_STRING] = "",
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};
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static enum markertype guess_value_type(struct property *prop)
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{
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int len = prop->val.len;
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const char *p = prop->val.val;
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struct marker *m = prop->val.markers;
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int nnotstring = 0, nnul = 0;
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int nnotstringlbl = 0, nnotcelllbl = 0;
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int i;
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for (i = 0; i < len; i++) {
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if (! isstring(p[i]))
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nnotstring++;
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if (p[i] == '\0')
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nnul++;
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}
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for_each_marker_of_type(m, LABEL) {
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if ((m->offset > 0) && (prop->val.val[m->offset - 1] != '\0'))
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nnotstringlbl++;
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if ((m->offset % sizeof(cell_t)) != 0)
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nnotcelllbl++;
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}
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if ((p[len-1] == '\0') && (nnotstring == 0) && (nnul < (len-nnul))
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&& (nnotstringlbl == 0)) {
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return TYPE_STRING;
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} else if (((len % sizeof(cell_t)) == 0) && (nnotcelllbl == 0)) {
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return TYPE_UINT32;
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}
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return TYPE_UINT8;
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}
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static void write_propval(FILE *f, struct property *prop)
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{
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size_t len = prop->val.len;
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struct marker *m = prop->val.markers;
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struct marker dummy_marker;
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enum markertype emit_type = TYPE_NONE;
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char *srcstr;
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if (len == 0) {
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fprintf(f, ";");
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if (annotate) {
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srcstr = srcpos_string_first(prop->srcpos, annotate);
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if (srcstr) {
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fprintf(f, " /* %s */", srcstr);
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free(srcstr);
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}
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}
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fprintf(f, "\n");
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return;
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}
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fprintf(f, " =");
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if (!next_type_marker(m)) {
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/* data type information missing, need to guess */
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dummy_marker.type = guess_value_type(prop);
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dummy_marker.next = prop->val.markers;
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dummy_marker.offset = 0;
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dummy_marker.ref = NULL;
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m = &dummy_marker;
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}
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for_each_marker(m) {
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size_t chunk_len = (m->next ? m->next->offset : len) - m->offset;
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size_t data_len = type_marker_length(m) ? : len - m->offset;
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const char *p = &prop->val.val[m->offset];
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if (has_data_type_information(m)) {
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emit_type = m->type;
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fprintf(f, " %s", delim_start[emit_type]);
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} else if (m->type == LABEL)
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fprintf(f, " %s:", m->ref);
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else if (m->offset)
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fputc(' ', f);
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if (emit_type == TYPE_NONE) {
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assert(chunk_len == 0);
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continue;
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}
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switch(emit_type) {
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case TYPE_UINT16:
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write_propval_int(f, p, chunk_len, 2);
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break;
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case TYPE_UINT32:
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write_propval_int(f, p, chunk_len, 4);
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break;
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case TYPE_UINT64:
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write_propval_int(f, p, chunk_len, 8);
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break;
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case TYPE_STRING:
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write_propval_string(f, p, chunk_len);
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break;
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default:
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write_propval_int(f, p, chunk_len, 1);
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}
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if (chunk_len == data_len) {
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size_t pos = m->offset + chunk_len;
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fprintf(f, pos == len ? "%s" : "%s,",
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delim_end[emit_type] ? : "");
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emit_type = TYPE_NONE;
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}
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}
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fprintf(f, ";");
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if (annotate) {
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srcstr = srcpos_string_first(prop->srcpos, annotate);
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if (srcstr) {
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fprintf(f, " /* %s */", srcstr);
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free(srcstr);
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}
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}
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fprintf(f, "\n");
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}
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static void write_tree_source_node(FILE *f, struct node *tree, int level)
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{
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struct property *prop;
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struct node *child;
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struct label *l;
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char *srcstr;
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write_prefix(f, level);
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for_each_label(tree->labels, l)
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fprintf(f, "%s: ", l->label);
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if (tree->name && (*tree->name))
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fprintf(f, "%s {", tree->name);
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else
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fprintf(f, "/ {");
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if (annotate) {
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srcstr = srcpos_string_first(tree->srcpos, annotate);
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if (srcstr) {
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fprintf(f, " /* %s */", srcstr);
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free(srcstr);
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}
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}
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fprintf(f, "\n");
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for_each_property(tree, prop) {
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write_prefix(f, level+1);
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for_each_label(prop->labels, l)
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fprintf(f, "%s: ", l->label);
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fprintf(f, "%s", prop->name);
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write_propval(f, prop);
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}
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for_each_child(tree, child) {
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fprintf(f, "\n");
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write_tree_source_node(f, child, level+1);
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}
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write_prefix(f, level);
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fprintf(f, "};");
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if (annotate) {
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srcstr = srcpos_string_last(tree->srcpos, annotate);
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if (srcstr) {
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fprintf(f, " /* %s */", srcstr);
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free(srcstr);
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}
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}
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fprintf(f, "\n");
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}
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void dt_to_source(FILE *f, struct dt_info *dti)
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{
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struct reserve_info *re;
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fprintf(f, "/dts-v1/;\n\n");
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for (re = dti->reservelist; re; re = re->next) {
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struct label *l;
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for_each_label(re->labels, l)
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fprintf(f, "%s: ", l->label);
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fprintf(f, "/memreserve/\t0x%016llx 0x%016llx;\n",
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(unsigned long long)re->address,
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(unsigned long long)re->size);
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}
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write_tree_source_node(f, dti->dt, 0);
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}
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