1362 lines
29 KiB
C++
1362 lines
29 KiB
C++
/*-
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* Copyright (c) 2013 David Chisnall
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "fdt.hh"
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#include <algorithm>
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#include <ctype.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <libgen.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "dtb.hh"
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namespace dtc
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{
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namespace fdt
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{
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uint32_t
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property_value::get_as_uint32()
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{
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if (byte_data.size() != 4)
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{
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return 0;
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}
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uint32_t v = 0;
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v &= byte_data[0] << 24;
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v &= byte_data[1] << 16;
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v &= byte_data[2] << 8;
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v &= byte_data[3] << 0;
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return v;
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}
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void
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property_value::push_to_buffer(byte_buffer &buffer)
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{
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if (!byte_data.empty())
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{
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buffer.insert(buffer.end(), byte_data.begin(), byte_data.end());
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}
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else
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{
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string_data.push_to_buffer(buffer, true);
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// Trailing nul
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buffer.push_back(0);
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}
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}
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void
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property_value::write_dts(FILE *file)
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{
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resolve_type();
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switch (type)
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{
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default:
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assert(0 && "Invalid type");
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case STRING:
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case STRING_LIST:
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case CROSS_REFERENCE:
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write_as_string(file);
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break;
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case PHANDLE:
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write_as_cells(file);
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break;
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case BINARY:
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if (byte_data.size() % 4 == 0)
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{
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write_as_cells(file);
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break;
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}
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write_as_bytes(file);
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break;
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}
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}
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void
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property_value::resolve_type()
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{
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if (type != UNKNOWN)
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{
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return;
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}
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if (byte_data.empty())
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{
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type = STRING;
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return;
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}
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if (byte_data.back() == 0)
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{
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bool is_all_printable = true;
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int nuls = 0;
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int bytes = 0;
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for (byte_buffer::iterator i=byte_data.begin(), e=byte_data.end()-1; i<e ; i++)
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{
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bytes++;
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is_all_printable &= (*i == '\0') || isprint(*i);
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if (*i == '\0')
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{
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nuls++;
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}
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if (!is_all_printable)
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{
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break;
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}
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}
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if (is_all_printable && (bytes > nuls))
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{
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type = STRING;
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if (nuls > 0)
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{
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type = STRING_LIST;
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}
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return;
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}
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}
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type = BINARY;
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}
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void
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property_value::write_as_string(FILE *file)
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{
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putc('"', file);
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if (byte_data.empty())
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{
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string_data.print(file);
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}
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else
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{
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for (byte_buffer::iterator i=byte_data.begin(), e=byte_data.end()-1; i!=e ; ++i)
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{
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// FIXME Escape tabs, newlines, and so on.
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if (*i == '\0')
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{
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fputs("\", \"", file);
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continue;
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}
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putc(*i, file);
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}
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}
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putc('"', file);
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}
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void
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property_value::write_as_cells(FILE *file)
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{
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putc('<', file);
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assert((byte_data.size() % 4) == 0);
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for (byte_buffer::iterator i=byte_data.begin(), e=byte_data.end(); i!=e ; ++i)
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{
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uint32_t v = 0;
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v = (v << 8) | *i;
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++i;
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v = (v << 8) | *i;
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++i;
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v = (v << 8) | *i;
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++i;
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v = (v << 8) | *i;
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fprintf(file, "0x%" PRIx32, v);
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if (i+1 != e)
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{
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putc(' ', file);
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}
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}
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putc('>', file);
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}
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void
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property_value::write_as_bytes(FILE *file)
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{
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putc('[', file);
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for (byte_buffer::iterator i=byte_data.begin(), e=byte_data.end(); i!=e ; i++)
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{
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fprintf(file, "%hhx", *i);
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if (i+1 != e)
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{
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putc(' ', file);
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}
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}
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putc(']', file);
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}
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void
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property::parse_string(input_buffer &input)
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{
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property_value v;
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assert(input[0] == '"');
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++input;
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const char *start = (const char*)input;
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int length = 0;
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while (char c = input[0])
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{
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if (c == '"' && input[-1] != '\\')
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{
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input.consume('"');
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break;
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}
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++input;
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++length;
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}
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v.string_data = string(start, length);
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values.push_back(v);
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}
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void
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property::parse_cells(input_buffer &input)
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{
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assert(input[0] == '<');
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++input;
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property_value v;
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input.next_token();
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while (!input.consume('>'))
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{
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input.next_token();
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// If this is a phandle then we need to get the name of the
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// referenced node
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if (input.consume('&'))
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{
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input.next_token();
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// FIXME: We should support full paths here, but we
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// don't.
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string referenced = string::parse_node_name(input);
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if (referenced.empty())
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{
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input.parse_error("Expected node name");
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valid = false;
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return;
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}
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input.next_token();
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// If we already have some bytes, make the phandle a
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// separate component.
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if (!v.byte_data.empty())
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{
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values.push_back(v);
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v = property_value();
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}
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v.string_data = referenced;
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v.type = property_value::PHANDLE;
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values.push_back(v);
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v = property_value();
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}
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else
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{
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//FIXME: We should support labels in the middle
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//of these, but we don't.
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long long val;
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if (!input.consume_integer(val))
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{
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input.parse_error("Expected numbers in array of cells");
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valid = false;
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return;
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}
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push_big_endian(v.byte_data, (uint32_t)val);
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input.next_token();
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}
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}
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// Don't store an empty string value here.
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if (v.byte_data.size() > 0)
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{
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values.push_back(v);
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}
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}
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void
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property::parse_bytes(input_buffer &input)
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{
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assert(input[0] == '[');
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++input;
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property_value v;
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input.next_token();
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while (!input.consume(']'))
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{
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{
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//FIXME: We should support
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//labels in the middle of
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//these, but we don't.
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uint8_t val;
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if (!input.consume_hex_byte(val))
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{
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input.parse_error("Expected hex bytes in array of bytes");
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valid = false;
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return;
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}
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v.byte_data.push_back(val);
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input.next_token();
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}
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}
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values.push_back(v);
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}
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void
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property::parse_reference(input_buffer &input)
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{
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assert(input[0] == '&');
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++input;
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input.next_token();
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property_value v;
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v.string_data = string::parse_node_name(input);
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if (v.string_data.empty())
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{
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input.parse_error("Expected node name");
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valid = false;
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return;
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}
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v.type = property_value::CROSS_REFERENCE;
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values.push_back(v);
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}
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property::property(input_buffer &structs, input_buffer &strings)
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{
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uint32_t name_offset;
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uint32_t length;
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valid = structs.consume_binary(length) &&
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structs.consume_binary(name_offset);
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if (!valid)
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{
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fprintf(stderr, "Failed to read property\n");
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return;
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}
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// Find the name
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input_buffer name_buffer = strings.buffer_from_offset(name_offset);
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if (name_buffer.empty())
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{
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fprintf(stderr, "Property name offset %" PRIu32
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" is past the end of the strings table\n",
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name_offset);
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valid = false;
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return;
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}
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key = string(name_buffer);
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// Read the value
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uint8_t byte;
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property_value v;
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for (uint32_t i=0 ; i<length ; i++)
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{
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if (!(valid = structs.consume_binary(byte)))
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{
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fprintf(stderr, "Failed to read property value\n");
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return;
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}
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v.byte_data.push_back(byte);
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}
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values.push_back(v);
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}
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property::property(input_buffer &input, string k, string l) : key(k), label(l),
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valid(true)
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{
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do {
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input.next_token();
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switch (input[0])
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{
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default:
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input.parse_error("Invalid property value.");
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valid = false;
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return;
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case '"':
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parse_string(input);
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break;
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case '<':
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parse_cells(input);
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break;
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case '[':
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parse_bytes(input);
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break;
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case '&':
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parse_reference(input);
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break;
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case ';':
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{
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break;
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}
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}
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input.next_token();
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} while (input.consume(','));
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if (!input.consume(';'))
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{
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input.parse_error("Expected ; at end of property");
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valid = false;
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}
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}
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property*
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property::parse_dtb(input_buffer &structs, input_buffer &strings)
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{
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property *p = new property(structs, strings);
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if (!p->valid)
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{
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delete p;
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p = 0;
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}
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return p;
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}
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property*
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property::parse(input_buffer &input, string key, string label)
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{
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property *p = new property(input, key, label);
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if (!p->valid)
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{
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delete p;
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p = 0;
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}
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return p;
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}
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void
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property::write(dtb::output_writer &writer, dtb::string_table &strings)
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{
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writer.write_token(dtb::FDT_PROP);
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byte_buffer value_buffer;
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for (value_iterator i=begin(), e=end() ; i!=e ; ++i)
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{
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i->push_to_buffer(value_buffer);
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}
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writer.write_data((uint32_t)value_buffer.size());
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writer.write_comment(key);
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writer.write_data(strings.add_string(key));
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writer.write_data(value_buffer);
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}
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void
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property::write_dts(FILE *file, int indent)
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{
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for (int i=0 ; i<indent ; i++)
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{
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putc('\t', file);
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}
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if (label != string())
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{
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label.print(file);
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fputs(": ", file);
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}
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if (key != string())
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{
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key.print(file);
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}
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if (!values.empty())
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{
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fputs(" = ", file);
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for (value_iterator i=begin(), e=end() ; i!=e ; ++i)
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{
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i->write_dts(file);
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if (i+1 != e)
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{
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putc(',', file);
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putc(' ', file);
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}
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}
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}
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fputs(";\n", file);
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}
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string
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node::parse_name(input_buffer &input, bool &is_property, const char *error)
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|
{
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if (!valid)
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{
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return string();
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|
}
|
|
input.next_token();
|
|
if (is_property)
|
|
{
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return string::parse_property_name(input);
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|
}
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string n = string::parse_node_or_property_name(input, is_property);
|
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if (n.empty())
|
|
{
|
|
if (n.empty())
|
|
{
|
|
input.parse_error(error);
|
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valid = false;
|
|
}
|
|
}
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return n;
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}
|
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node::node(input_buffer &structs, input_buffer &strings) : valid(true)
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|
{
|
|
const char *name_start = (const char*)structs;
|
|
int name_length = 0;
|
|
while (structs[0] != '\0' && structs[0] != '@')
|
|
{
|
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name_length++;
|
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++structs;
|
|
}
|
|
name = string(name_start, name_length);
|
|
if (structs[0] == '@')
|
|
{
|
|
++structs;
|
|
name_start = (const char*)structs;
|
|
name_length = 0;
|
|
while (structs[0] != '\0')
|
|
{
|
|
name_length++;
|
|
++structs;
|
|
}
|
|
unit_address = string(name_start, name_length);
|
|
}
|
|
++structs;
|
|
uint32_t token;
|
|
while (structs.consume_binary(token))
|
|
{
|
|
switch (token)
|
|
{
|
|
default:
|
|
fprintf(stderr, "Unexpected token 0x%" PRIx32
|
|
" while parsing node.\n", token);
|
|
valid = false;
|
|
return;
|
|
// Child node, parse it.
|
|
case dtb::FDT_BEGIN_NODE:
|
|
{
|
|
node *child = node::parse_dtb(structs, strings);
|
|
if (child == 0)
|
|
{
|
|
valid = false;
|
|
return;
|
|
}
|
|
children.push_back(child);
|
|
break;
|
|
}
|
|
// End of this node, no errors.
|
|
case dtb::FDT_END_NODE:
|
|
return;
|
|
// Property, parse it.
|
|
case dtb::FDT_PROP:
|
|
{
|
|
property *prop = property::parse_dtb(structs, strings);
|
|
if (prop == 0)
|
|
{
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|
valid = false;
|
|
return;
|
|
}
|
|
properties.push_back(prop);
|
|
break;
|
|
}
|
|
break;
|
|
// End of structs table. Should appear after
|
|
// the end of the last node.
|
|
case dtb::FDT_END:
|
|
fprintf(stderr, "Unexpected FDT_END token while parsing node.\n");
|
|
valid = false;
|
|
return;
|
|
// NOPs are padding. Ignore them.
|
|
case dtb::FDT_NOP:
|
|
break;
|
|
}
|
|
}
|
|
fprintf(stderr, "Failed to read token from structs table while parsing node.\n");
|
|
valid = false;
|
|
return;
|
|
}
|
|
|
|
node::node(input_buffer &input, string n, string l, string a) :
|
|
label(l), name(n), unit_address(a), valid(true)
|
|
{
|
|
if (!input.consume('{'))
|
|
{
|
|
input.parse_error("Expected { to start new device tree node.\n");
|
|
}
|
|
input.next_token();
|
|
while (valid && !input.consume('}'))
|
|
{
|
|
// flag set if we find any characters that are only in
|
|
// the property name character set, not the node
|
|
bool is_property = false;
|
|
string child_name, child_label, child_address;
|
|
child_name = parse_name(input, is_property,
|
|
"Expected property or node name");
|
|
if (input.consume(':'))
|
|
{
|
|
// Node labels can contain any characters? The
|
|
// spec doesn't say, so we guess so...
|
|
is_property = false;
|
|
child_label = child_name;
|
|
child_name = parse_name(input, is_property, "Expected property or node name");
|
|
}
|
|
if (input.consume('@'))
|
|
{
|
|
child_address = parse_name(input, is_property, "Expected unit address");
|
|
}
|
|
if (!valid)
|
|
{
|
|
return;
|
|
}
|
|
input.next_token();
|
|
// If we're parsing a property, then we must actually do that.
|
|
if (input.consume('='))
|
|
{
|
|
property *p= property::parse(input, child_name,
|
|
child_label);
|
|
if (p == 0)
|
|
{
|
|
valid = false;
|
|
}
|
|
else
|
|
{
|
|
properties.push_back(p);
|
|
}
|
|
}
|
|
else if (!is_property && input[0] == ('{'))
|
|
{
|
|
node *child = node::parse(input, child_name,
|
|
child_label, child_address);
|
|
if (child)
|
|
{
|
|
children.push_back(child);
|
|
}
|
|
else
|
|
{
|
|
valid = false;
|
|
}
|
|
}
|
|
else if (input.consume(';'))
|
|
{
|
|
properties.push_back(new property(child_name, child_label));
|
|
}
|
|
else
|
|
{
|
|
input.parse_error("Error parsing property.");
|
|
valid = false;
|
|
}
|
|
input.next_token();
|
|
}
|
|
input.consume(';');
|
|
}
|
|
|
|
bool
|
|
node::cmp_properties(property *p1, property *p2)
|
|
{
|
|
return p1->get_key() < p2->get_key();
|
|
}
|
|
|
|
bool
|
|
node::cmp_children(node *c1, node *c2)
|
|
{
|
|
if (c1->name == c2->name)
|
|
{
|
|
return c1->unit_address < c2->unit_address;
|
|
}
|
|
return c1->name < c2->name;
|
|
}
|
|
|
|
void
|
|
node::sort()
|
|
{
|
|
std::sort(property_begin(), property_end(), cmp_properties);
|
|
std::sort(child_begin(), child_end(), cmp_children);
|
|
for (child_iterator i=child_begin(), e=child_end() ; i!=e ; ++i)
|
|
{
|
|
(*i)->sort();
|
|
}
|
|
}
|
|
|
|
node*
|
|
node::parse(input_buffer &input, string name, string label, string address)
|
|
{
|
|
node *n = new node(input, name, label, address);
|
|
if (!n->valid)
|
|
{
|
|
delete n;
|
|
n = 0;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
node*
|
|
node::parse_dtb(input_buffer &structs, input_buffer &strings)
|
|
{
|
|
node *n = new node(structs, strings);
|
|
if (!n->valid)
|
|
{
|
|
delete n;
|
|
n = 0;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
node::~node()
|
|
{
|
|
while (!children.empty())
|
|
{
|
|
delete children.back();
|
|
children.pop_back();
|
|
}
|
|
while (!properties.empty())
|
|
{
|
|
delete properties.back();
|
|
properties.pop_back();
|
|
}
|
|
}
|
|
|
|
property*
|
|
node::get_property(string key)
|
|
{
|
|
for (property_iterator i=property_begin(), e=property_end() ; i!=e ; ++i)
|
|
{
|
|
if ((*i)->get_key() == key)
|
|
{
|
|
return *i;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
node::merge_node(node *other)
|
|
{
|
|
if (!other->label.empty())
|
|
{
|
|
label = other->label;
|
|
}
|
|
// Note: this is an O(n*m) operation. It might be sensible to
|
|
// optimise this if we find that there are nodes with very
|
|
// large numbers of properties, but for typical usage the
|
|
// entire vector will fit (easily) into cache, so iterating
|
|
// over it repeatedly isn't that expensive.
|
|
while (!other->properties.empty())
|
|
{
|
|
property *p = other->properties.front();
|
|
for (property_iterator i=property_begin(), e=property_end() ; i!=e ; ++i)
|
|
{
|
|
if ((*i)->get_key() == p->get_key())
|
|
{
|
|
delete *i;
|
|
properties.erase(i);
|
|
break;
|
|
}
|
|
}
|
|
add_property(p);
|
|
other->properties.erase(other->properties.begin());
|
|
}
|
|
while (!other->children.empty())
|
|
{
|
|
node *c = other->children.front();
|
|
bool found = false;
|
|
for (child_iterator i=child_begin(), e=child_end() ; i!=e ; ++i)
|
|
{
|
|
if ((*i)->name == c->name && (*i)->unit_address == c->unit_address)
|
|
{
|
|
(*i)->merge_node(c);
|
|
delete c;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
{
|
|
children.push_back(c);
|
|
}
|
|
other->children.erase(other->children.begin());
|
|
}
|
|
}
|
|
|
|
void
|
|
node::write(dtb::output_writer &writer, dtb::string_table &strings)
|
|
{
|
|
writer.write_token(dtb::FDT_BEGIN_NODE);
|
|
byte_buffer name_buffer;
|
|
name.push_to_buffer(name_buffer);
|
|
if (unit_address != string())
|
|
{
|
|
name_buffer.push_back('@');
|
|
unit_address.push_to_buffer(name_buffer);
|
|
}
|
|
writer.write_comment(name);
|
|
writer.write_data(name_buffer);
|
|
writer.write_data((uint8_t)0);
|
|
for (property_iterator i=property_begin(), e=property_end() ; i!=e ; ++i)
|
|
{
|
|
(*i)->write(writer, strings);
|
|
}
|
|
for (child_iterator i=child_begin(), e=child_end() ; i!=e ; ++i)
|
|
{
|
|
(*i)->write(writer, strings);
|
|
}
|
|
writer.write_token(dtb::FDT_END_NODE);
|
|
}
|
|
|
|
void
|
|
node::write_dts(FILE *file, int indent)
|
|
{
|
|
for (int i=0 ; i<indent ; i++)
|
|
{
|
|
putc('\t', file);
|
|
}
|
|
if (label != string())
|
|
{
|
|
label.print(file);
|
|
fputs(": ", file);
|
|
}
|
|
if (name != string())
|
|
{
|
|
name.print(file);
|
|
}
|
|
if (unit_address != string())
|
|
{
|
|
putc('@', file);
|
|
unit_address.print(file);
|
|
}
|
|
fputs(" {\n\n", file);
|
|
for (property_iterator i=property_begin(), e=property_end() ; i!=e ; ++i)
|
|
{
|
|
(*i)->write_dts(file, indent+1);
|
|
}
|
|
for (child_iterator i=child_begin(), e=child_end() ; i!=e ; ++i)
|
|
{
|
|
(*i)->write_dts(file, indent+1);
|
|
}
|
|
for (int i=0 ; i<indent ; i++)
|
|
{
|
|
putc('\t', file);
|
|
}
|
|
fputs("};\n", file);
|
|
}
|
|
|
|
void
|
|
device_tree::collect_names_recursive(node* n, node_path &path)
|
|
{
|
|
string name = n->label;
|
|
path.push_back(std::make_pair(n->name, n->unit_address));
|
|
if (name != string())
|
|
{
|
|
if (node_names.find(name) == node_names.end())
|
|
{
|
|
node_names.insert(std::make_pair(name, n));
|
|
node_paths.insert(std::make_pair(name, path));
|
|
}
|
|
else
|
|
{
|
|
node_names[name] = (node*)-1;
|
|
std::map<string, node_path>::iterator i = node_paths.find(name);
|
|
if (i != node_paths.end())
|
|
{
|
|
node_paths.erase(name);
|
|
}
|
|
fprintf(stderr, "Label not unique: ");
|
|
name.dump();
|
|
fprintf(stderr, ". References to this label will not be resolved.");
|
|
}
|
|
}
|
|
for (node::child_iterator i=n->child_begin(), e=n->child_end() ; i!=e ; ++i)
|
|
{
|
|
collect_names_recursive(*i, path);
|
|
}
|
|
path.pop_back();
|
|
// Now we collect the phandles and properties that reference
|
|
// other nodes.
|
|
for (node::property_iterator i=n->property_begin(), e=n->property_end() ; i!=e ; ++i)
|
|
{
|
|
for (property::value_iterator p=(*i)->begin(),pe=(*i)->end() ; p!=pe ; ++p)
|
|
{
|
|
if (p->is_phandle())
|
|
{
|
|
phandles.push_back(&*p);
|
|
}
|
|
if (p->is_cross_reference())
|
|
{
|
|
cross_references.push_back(&*p);
|
|
}
|
|
}
|
|
if ((*i)->get_key() == string("phandle") ||
|
|
(*i)->get_key() == string("linux,phandle"))
|
|
{
|
|
if ((*i)->begin()->byte_data.size() != 4)
|
|
{
|
|
fprintf(stderr, "Invalid phandle value for node ");
|
|
n->name.dump();
|
|
fprintf(stderr, ". Should be a 4-byte value.\n");
|
|
valid = false;
|
|
}
|
|
else
|
|
{
|
|
uint32_t phandle = (*i)->begin()->get_as_uint32();
|
|
used_phandles.insert(std::make_pair(phandle, n));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
device_tree::collect_names()
|
|
{
|
|
node_path p;
|
|
collect_names_recursive(root, p);
|
|
}
|
|
|
|
void
|
|
device_tree::resolve_cross_references()
|
|
{
|
|
for (std::vector<property_value*>::iterator i=cross_references.begin(), e=cross_references.end() ; i!=e ; ++i)
|
|
{
|
|
property_value* pv = *i;
|
|
node_path path = node_paths[pv->string_data];
|
|
// Skip the first name in the path. It's always "", and implicitly /
|
|
for (node_path::iterator p=path.begin()+1, pe=path.end() ; p!=pe ; ++p)
|
|
{
|
|
pv->byte_data.push_back('/');
|
|
p->first.push_to_buffer(pv->byte_data);
|
|
if (!(p->second.empty()))
|
|
{
|
|
pv->byte_data.push_back('@');
|
|
p->second.push_to_buffer(pv->byte_data);
|
|
}
|
|
}
|
|
pv->byte_data.push_back(0);
|
|
}
|
|
uint32_t phandle = 1;
|
|
for (std::vector<property_value*>::iterator i=phandles.begin(), e=phandles.end() ; i!=e ; ++i)
|
|
{
|
|
string target_name = (*i)->string_data;
|
|
node *target = node_names[target_name];
|
|
if (target == 0)
|
|
{
|
|
fprintf(stderr, "Failed to find node with label:");
|
|
target_name.dump();
|
|
fprintf(stderr, "\n");
|
|
valid = 0;
|
|
return;
|
|
}
|
|
// If there is an existing phandle, use it
|
|
property *p = target->get_property("phandle");
|
|
if (p == 0)
|
|
{
|
|
p = target->get_property("linux,phandle");
|
|
}
|
|
if (p == 0)
|
|
{
|
|
// Otherwise insert a new phandle node
|
|
property_value v;
|
|
while (used_phandles.find(phandle) != used_phandles.end())
|
|
{
|
|
// Note that we only don't need to
|
|
// store this phandle in the set,
|
|
// because we are monotonically
|
|
// increasing the value of phandle and
|
|
// so will only ever revisit this value
|
|
// if we have used 2^32 phandles, at
|
|
// which point our blob won't fit in
|
|
// any 32-bit system and we've done
|
|
// something badly wrong elsewhere
|
|
// already.
|
|
phandle++;
|
|
}
|
|
push_big_endian(v.byte_data, phandle++);
|
|
if (phandle_node_name == BOTH || phandle_node_name == LINUX)
|
|
{
|
|
p = new property(string("linux,phandle"));
|
|
p->add_value(v);
|
|
target->add_property(p);
|
|
}
|
|
if (phandle_node_name == BOTH || phandle_node_name == EPAPR)
|
|
{
|
|
p = new property(string("phandle"));
|
|
p->add_value(v);
|
|
target->add_property(p);
|
|
}
|
|
}
|
|
p->begin()->push_to_buffer((*i)->byte_data);
|
|
assert((*i)->byte_data.size() == 4);
|
|
}
|
|
}
|
|
|
|
void
|
|
device_tree::parse_roots(input_buffer &input, std::vector<node*> &roots)
|
|
{
|
|
input.next_token();
|
|
while (valid && input.consume('/'))
|
|
{
|
|
input.next_token();
|
|
node *n = node::parse(input, string("", 1));
|
|
if (n)
|
|
{
|
|
roots.push_back(n);
|
|
}
|
|
else
|
|
{
|
|
valid = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
input_buffer*
|
|
device_tree::buffer_for_file(const char *path)
|
|
{
|
|
if (string(path) == string("-"))
|
|
{
|
|
input_buffer *b = new stream_input_buffer();
|
|
buffers.push_back(b);
|
|
return b;
|
|
}
|
|
int source = open(path, O_RDONLY);
|
|
if (source == -1)
|
|
{
|
|
fprintf(stderr, "Unable to open file %s\n", path);
|
|
return 0;
|
|
}
|
|
input_buffer *b = new mmap_input_buffer(source);
|
|
// Keep the buffer that owns the memory around for the lifetime
|
|
// of this FDT. Ones simply referring to it may have shorter
|
|
// lifetimes.
|
|
buffers.push_back(b);
|
|
close(source);
|
|
return b;
|
|
}
|
|
|
|
template<class writer> void
|
|
device_tree::write(int fd)
|
|
{
|
|
dtb::string_table st;
|
|
dtb::header head;
|
|
writer head_writer;
|
|
writer reservation_writer;
|
|
writer struct_writer;
|
|
writer strings_writer;
|
|
|
|
// Build the reservation table
|
|
reservation_writer.write_comment(string("Memory reservations"));
|
|
reservation_writer.write_label(string("dt_reserve_map"));
|
|
for (std::vector<reservation>::iterator i=reservations.begin(),
|
|
e=reservations.end() ; i!=e ; ++i)
|
|
{
|
|
reservation_writer.write_comment(string("Reservation start"));
|
|
reservation_writer.write_data(i->first);
|
|
reservation_writer.write_comment(string("Reservation length"));
|
|
reservation_writer.write_data(i->first);
|
|
}
|
|
// Write n spare reserve map entries, plus the trailing 0.
|
|
for (uint32_t i=0 ; i<=spare_reserve_map_entries ; i++)
|
|
{
|
|
reservation_writer.write_data((uint64_t)0);
|
|
reservation_writer.write_data((uint64_t)0);
|
|
}
|
|
|
|
|
|
struct_writer.write_comment(string("Device tree"));
|
|
struct_writer.write_label(string("dt_struct_start"));
|
|
root->write(struct_writer, st);
|
|
struct_writer.write_token(dtb::FDT_END);
|
|
struct_writer.write_label(string("dt_struct_end"));
|
|
|
|
st.write(strings_writer);
|
|
// Find the strings size before we stick padding on the end.
|
|
// Note: We should possibly use a new writer for the padding.
|
|
head.size_dt_strings = strings_writer.size();
|
|
|
|
// Stick the padding in the strings writer, but after the
|
|
// marker indicating that it's the end.
|
|
// Note: We probably should add a padding call to the writer so
|
|
// that the asm back end can write padding directives instead
|
|
// of a load of 0 bytes.
|
|
for (uint32_t i=0 ; i<blob_padding ; i++)
|
|
{
|
|
strings_writer.write_data((uint8_t)0);
|
|
}
|
|
head.totalsize = sizeof(head) + strings_writer.size() +
|
|
struct_writer.size() + reservation_writer.size();
|
|
while (head.totalsize < minimum_blob_size)
|
|
{
|
|
head.totalsize++;
|
|
strings_writer.write_data((uint8_t)0);
|
|
}
|
|
head.off_dt_struct = sizeof(head) + reservation_writer.size();;
|
|
head.off_dt_strings = head.off_dt_struct + struct_writer.size();
|
|
head.off_mem_rsvmap = sizeof(head);
|
|
head.boot_cpuid_phys = boot_cpu;
|
|
head.size_dt_struct = struct_writer.size();
|
|
head.write(head_writer);
|
|
|
|
head_writer.write_to_file(fd);
|
|
reservation_writer.write_to_file(fd);
|
|
struct_writer.write_to_file(fd);
|
|
strings_writer.write_label(string("dt_blob_end"));
|
|
strings_writer.write_to_file(fd);
|
|
}
|
|
|
|
node*
|
|
device_tree::referenced_node(property_value &v)
|
|
{
|
|
if (v.is_phandle())
|
|
{
|
|
return node_names[v.string_data];
|
|
}
|
|
if (v.is_binary())
|
|
{
|
|
return used_phandles[v.get_as_uint32()];
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
device_tree::write_binary(int fd)
|
|
{
|
|
write<dtb::binary_writer>(fd);
|
|
}
|
|
|
|
void
|
|
device_tree::write_asm(int fd)
|
|
{
|
|
write<dtb::asm_writer>(fd);
|
|
}
|
|
|
|
void
|
|
device_tree::write_dts(int fd)
|
|
{
|
|
FILE *file = fdopen(fd, "w");
|
|
fputs("/dtc-v1/;\n\n", file);
|
|
|
|
if (!reservations.empty())
|
|
{
|
|
const char msg[] = "/memreserve/";
|
|
fwrite(msg, sizeof(msg), 1, file);
|
|
for (std::vector<reservation>::iterator i=reservations.begin(),
|
|
e=reservations.end() ; i!=e ; ++i)
|
|
{
|
|
fprintf(stderr, " %" PRIx64 " %" PRIx64, i->first, i->second);
|
|
}
|
|
fputs(";\n\n", file);
|
|
}
|
|
putc('/', file);
|
|
putc(' ', file);
|
|
root->write_dts(file, 0);
|
|
fclose(file);
|
|
}
|
|
|
|
void
|
|
device_tree::parse_dtb(const char *fn, FILE *depfile)
|
|
{
|
|
input_buffer *in = buffer_for_file(fn);
|
|
if (in == 0)
|
|
{
|
|
valid = false;
|
|
return;
|
|
}
|
|
input_buffer &input = *in;
|
|
dtb::header h;
|
|
valid = h.read_dtb(input);
|
|
boot_cpu = h.boot_cpuid_phys;
|
|
if (h.last_comp_version > 17)
|
|
{
|
|
fprintf(stderr, "Don't know how to read this version of the device tree blob");
|
|
valid = false;
|
|
}
|
|
if (!valid)
|
|
{
|
|
return;
|
|
}
|
|
input_buffer reservation_map =
|
|
input.buffer_from_offset(h.off_mem_rsvmap, 0);
|
|
uint64_t start, length;
|
|
do
|
|
{
|
|
if (!(reservation_map.consume_binary(start) &&
|
|
reservation_map.consume_binary(length)))
|
|
{
|
|
fprintf(stderr, "Failed to read memory reservation table\n");
|
|
valid = false;
|
|
return;
|
|
}
|
|
} while (!((start == 0) && (length == 0)));
|
|
input_buffer struct_table =
|
|
input.buffer_from_offset(h.off_dt_struct, h.size_dt_struct);
|
|
input_buffer strings_table =
|
|
input.buffer_from_offset(h.off_dt_strings, h.size_dt_strings);
|
|
uint32_t token;
|
|
if (!(struct_table.consume_binary(token) &&
|
|
(token == dtb::FDT_BEGIN_NODE)))
|
|
{
|
|
fprintf(stderr, "Expected FDT_BEGIN_NODE token.\n");
|
|
valid = false;
|
|
return;
|
|
}
|
|
root = node::parse_dtb(struct_table, strings_table);
|
|
if (!(struct_table.consume_binary(token) && (token == dtb::FDT_END)))
|
|
{
|
|
fprintf(stderr, "Expected FDT_END token after parsing root node.\n");
|
|
valid = false;
|
|
return;
|
|
}
|
|
valid = (root != 0);
|
|
}
|
|
|
|
void
|
|
device_tree::parse_dts(const char *fn, FILE *depfile)
|
|
{
|
|
input_buffer *in = buffer_for_file(fn);
|
|
if (in == 0)
|
|
{
|
|
valid = false;
|
|
return;
|
|
}
|
|
std::vector<node*> roots;
|
|
input_buffer &input = *in;
|
|
input.next_token();
|
|
bool read_header = false;
|
|
// Read the header
|
|
if (input.consume("/dts-v1/;"))
|
|
{
|
|
read_header = true;
|
|
}
|
|
input.next_token();
|
|
while(input.consume("/include/"))
|
|
{
|
|
input.next_token();
|
|
if (!input.consume('"'))
|
|
{
|
|
input.parse_error("Expected quoted filename");
|
|
valid = false;
|
|
return;
|
|
}
|
|
int length = 0;
|
|
while (input[length] != '"') length++;
|
|
|
|
const char *file = (const char*)input;
|
|
const char *dir = dirname(fn);
|
|
int dir_length = strlen(dir);
|
|
char *include_file = (char*)malloc(strlen(dir) + length + 2);
|
|
memcpy(include_file, dir, dir_length);
|
|
include_file[dir_length] = '/';
|
|
memcpy(include_file+dir_length+1, file, length);
|
|
include_file[dir_length+length+1] = 0;
|
|
input_buffer *include_buffer = buffer_for_file(include_file);
|
|
|
|
if (include_buffer == 0)
|
|
{
|
|
for (std::vector<const char*>::iterator i=include_paths.begin(), e=include_paths.end() ; e!=i ; ++i)
|
|
{
|
|
free(include_file);
|
|
dir = *i;
|
|
dir_length = strlen(dir);
|
|
include_file = (char*)malloc(strlen(dir) +
|
|
length + 2);
|
|
memcpy(include_file, dir, dir_length);
|
|
include_file[dir_length] = '/';
|
|
memcpy(include_file+dir_length+1, file, length);
|
|
include_file[dir_length+length+1] = 0;
|
|
include_buffer = buffer_for_file(include_file);
|
|
if (include_buffer != 0)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (depfile != 0)
|
|
{
|
|
putc(' ', depfile);
|
|
fputs(include_file, depfile);
|
|
}
|
|
if (include_buffer == 0)
|
|
{
|
|
valid = false;
|
|
return;
|
|
}
|
|
input_buffer &include = *include_buffer;
|
|
input.consume(include_file+dir_length+1);
|
|
input.consume('"');
|
|
free((void*)include_file);
|
|
|
|
if (!read_header)
|
|
{
|
|
include.next_token();
|
|
read_header = include.consume("/dts-v1/;");
|
|
}
|
|
parse_roots(include, roots);
|
|
}
|
|
input.next_token();
|
|
if (!read_header)
|
|
{
|
|
input.parse_error("Expected /dts-v1/; version string");
|
|
}
|
|
// Read any memory reservations
|
|
while(input.consume("/memreserve/"))
|
|
{
|
|
long long start, len;
|
|
input.next_token();
|
|
// Read the start and length.
|
|
if (!(input.consume_integer(start) &&
|
|
(input.next_token(),
|
|
input.consume_integer(len))))
|
|
{
|
|
input.parse_error("Expected /dts-v1/; version string");
|
|
}
|
|
input.next_token();
|
|
input.consume(';');
|
|
reservations.push_back(reservation(start, len));
|
|
}
|
|
parse_roots(input, roots);
|
|
switch (roots.size())
|
|
{
|
|
case 0:
|
|
valid = false;
|
|
input.parse_error("Failed to find root node /.");
|
|
return;
|
|
case 1:
|
|
root = roots[0];
|
|
break;
|
|
default:
|
|
{
|
|
root = roots[0];
|
|
for (std::vector<node*>::iterator i=roots.begin()+1,
|
|
e=roots.end() ; i!=e ; ++i)
|
|
{
|
|
root->merge_node(*i);
|
|
delete *i;
|
|
}
|
|
roots.resize(1);
|
|
}
|
|
}
|
|
collect_names();
|
|
resolve_cross_references();
|
|
}
|
|
|
|
device_tree::~device_tree()
|
|
{
|
|
if (root != 0)
|
|
{
|
|
delete root;
|
|
}
|
|
while (!buffers.empty())
|
|
{
|
|
delete buffers.back();
|
|
buffers.pop_back();
|
|
}
|
|
}
|
|
|
|
} // namespace fdt
|
|
|
|
} // namespace dtc
|
|
|