diff options
author | Anthony Gutierrez <atgutier@umich.edu> | 2013-02-15 18:48:59 -0500 |
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committer | Anthony Gutierrez <atgutier@umich.edu> | 2013-02-15 18:48:59 -0500 |
commit | f7107fb7954b45547ab792493e86760cf6fe33ed (patch) | |
tree | 3beddab45393dc5dd5799c6f5346e73fa8a5b52e /src/base/loader/dtb_object.hh | |
parent | ba983f9387a703f3be8149382d4f0dcfb2009b6c (diff) | |
download | gem5-f7107fb7954b45547ab792493e86760cf6fe33ed.tar.xz |
loader: add a flattened device tree blob (dtb) object
this adds a dtb_object so the loader can load in the dtb
file for linux/android ARM kernels.
Diffstat (limited to 'src/base/loader/dtb_object.hh')
-rw-r--r-- | src/base/loader/dtb_object.hh | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/base/loader/dtb_object.hh b/src/base/loader/dtb_object.hh new file mode 100644 index 000000000..ec5294553 --- /dev/null +++ b/src/base/loader/dtb_object.hh @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2013 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Anthony Gutierrez + */ + +#ifndef __DTB_OBJECT_HH__ +#define __DTB_OBJECT_HH__ + +#include "base/loader/object_file.hh" + +/** @file + * This implements an object file format to support loading + * and modifying flattened device tree blobs for use with + * current and future ARM Linux kernels. + */ +class DtbObject : public ObjectFile +{ + protected: + DtbObject(const std::string &_filename, int _fd, + size_t _len, uint8_t *_data, + Arch _arch, OpSys _opSys); + + /** Bool marking if this dtb file has replaced the original + * read in DTB file with a new modified buffer + */ + bool fileDataMmapped; + + public: + virtual ~DtbObject(); + + /** Adds the passed in Command Line options for the kernel + * to the proper location in the device tree. + * @param _args command line to append + * @param len length of the command line string + * @return returns true on success, false otherwise + */ + bool addBootCmdLine(const char* _args, size_t len); + bool loadGlobalSymbols(SymbolTable *symtab, + Addr addrMask = std::numeric_limits<Addr>::max()); + bool loadLocalSymbols(SymbolTable *symtab, + Addr addrMask = std::numeric_limits<Addr>::max()); + + /** Static function that tries to load file as a + * flattened device tree blob. + * @param fname path to file + * @param fd file descriptor of object file + * @param len length of file + * @param data mmap'ed data buffer containing file contents + * @return ObjectFile representing closest match of file type + */ + static ObjectFile *tryFile(const std::string &fname, int fd, + size_t len, uint8_t *data); +}; + +#endif //__DTB_OBJECT_HH__ |