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hwpatcher: add framework for CRC computation

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Change-Id: Ib78f0fe58db5cec86f043d3e9e1ca14e69297ba0
Reviewed-on: http://gerrit.rockbox.org/911
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
This commit is contained in:
Amaury Pouly 2014-08-13 12:46:45 +02:00 • committed by Marcin Bukat
parent bfbec3a3a7
commit 69df56504e
2 changed files with 106 additions and 11 deletions
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32
utils/hwpatcher/lib.lua
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@ -8,16 +8,21 @@ At global level:
- exit() Same as quit()
In the hwp table:
- load_file(filename) Load a firmware and guess type
- load_elf_file(filename) Load a firmware as ELF
- load_sb_file(filename) Load a firmware as SB
- load_sb1_file(filename) Load a firmware as SB1
- load_bin_file(filename) Load a firmware as binary
- save_file(obj, filename) Save a firmware to a file
- read(obj, addr, len) Read data from a firmware
- write(obj, addr, data) Write data to a firmware
- section_info(obj, sec) Return information about a section in a table (or nil)
- md5sum(filename) Compute the MD5 sum of a file
- load_file(filename) Load a firmware and guess type
- load_elf_file(filename) Load a firmware as ELF
- load_sb_file(filename) Load a firmware as SB
- load_sb1_file(filename) Load a firmware as SB1
- load_bin_file(filename) Load a firmware as binary
- save_file(fw, filename) Save a firmware to a file
- read(fw, addr, len) Read data from a firmware
- write(fw, addr, data) Write data to a firmware
- section_info(fw, sec) Return information about a section in a table (or nil)
- md5sum(filename) Compute the MD5 sum of a file
- crc_buf(crc_type, buf) Compute the CRC of a byte buffer and return a byte buffer
- crc(crc_type, fw, addr, len) Compute the CRC of a firmware part
The list of CRCs available is available the hwp.CRC table:
- RKW
Data read/written from/to a firmware must must be an array of bytes.
The address must be a table of the following fields:
@ -27,7 +32,7 @@ Data section information is a table with the following fields:
- address: first address if the section
- size: size of the section
We provide the following functions to help dealing with addresses:
- make_addr
- make_addr(addr, section) Build a firmware address from a raw address and a section
]]--
@ -105,3 +110,8 @@ function hwp.md5str(md5)
end
return s
end
-- compute the CRC of a firmware part
function hwp.crc(crc_type, fw, addr, len)
return hwp.crc_buf(crc_type, hwp.read(fw, addr, len))
end