def gen_pmecc_header(page_size, oob_size, ecc_bits, sector_size):
'''
generate a pmecc header value, which is 32bits.
'''
# print 'page_size: %d, oob_size: %d, ecc_bits: %d, sector_size: %d' \
# % (page_size, oob_size, ecc_bits, sector_size)
nbSectorPerPage = page_size // sector_size
eccOffset = oob_size - nbSectorPerPage * pmecc_get_ecc_bytes(
ecc_bits, sector_size)
#print 'eccOffset = %d, nbSector = %d, nbSectorPerPage = %d' % (eccOffset, nbSectorPerPage, nbSectorPerPage)
######## name : value (the excceed field will be ignored)
#
# name should be same as .json struct[] array's name.
maps = {
"key": 0xc,
"usePmecc": (ecc_bits > 1),
"nbSectorPerPage": nbSectorPerPage,
"spareSize": oob_size,
"eccBitReq": 2 if ecc_bits < 2 else ecc_bits,
"sectorSize": sector_size,
"eccOffset": eccOffset,
}
path_list = [
os.getcwd(),
os.path.join(os.getcwd(), 'scripts'),
]
for path in path_list:
fname = os.path.join(path, 'pmecc_head.json')
if os.path.isfile(fname):
json_file = open(fname)
data = json.load(json_file)
val = bitfieldsparser.convert_bitfield(
data["pmecc_header"]["struct"], maps)
#print 'val = 0x%x' % val
json_file.close()
return val
sys.exit('Cannot find pmecc_head.json!')
def gen_pmecc_header(page_size, oob_size, ecc_bits, sector_size):
'''
generate a pmecc header value, which is 32bits.
'''
# print 'page_size: %d, oob_size: %d, ecc_bits: %d, sector_size: %d' \
# % (page_size, oob_size, ecc_bits, sector_size)
nbSectorPerPage = page_size // sector_size
eccOffset = oob_size - nbSectorPerPage * pmecc_get_ecc_bytes(ecc_bits, sector_size)
#print 'eccOffset = %d, nbSector = %d, nbSectorPerPage = %d' % (eccOffset, nbSectorPerPage, nbSectorPerPage)
######## name : value (the excceed field will be ignored)
#
# name should be same as .json struct[] array's name.
maps = {
"key" : 0xc,
"usePmecc" : (ecc_bits > 1),
"nbSectorPerPage" : nbSectorPerPage,
"spareSize" : oob_size,
"eccBitReq" : 2 if ecc_bits < 2 else ecc_bits,
"sectorSize" : sector_size,
"eccOffset" : eccOffset,
}
path_list = [
os.getcwd(),
os.path.join(os.getcwd(), 'scripts'),
]
for path in path_list:
fname = os.path.join(path, 'pmecc_head.json')
if os.path.isfile(fname):
json_file=open(fname)
data = json.load(json_file)
val = bitfieldsparser.convert_bitfield(data["pmecc_header"]["struct"], maps)
#print 'val = 0x%x' % val
json_file.close()
return val
sys.exit('Cannot find pmecc_head.json!')