How to download modem image via fastboot with QRD8x25 platform

Note: it is only for emmc boot.
1.change mbr_fill_name() in the $(AP_CODE)/bootable/bootloader/lk/platform/msm_shared/partition_parser.c
(1).change "memcpy(partition_ent->name, "sbl1", 4);" to "memcpy(partition_ent->name, "qcsblhd_cfgdata", 15);"
(2).change "memcpy(partition_ent->name, "sbl3", 4);" to
"memcpy(partition_ent->name, "qcsbl", 5);"
(3).change "memcpy(partition_ent->name, "rpm", 3);" to
"memcpy(partition_ent->name, "emmc_appsboot", 13);"
(4).change "memcpy(partition_ent->name, "tz", 2);" to "memcpy(partition_ent->name, "oemsbl", 6);"
(5).delete all the functions when the type is "MBR_MODEM_TYPE" or MBR_MODEM_TYPE2, and execute "memcpy(partition_ent->name, "fat", 3);" when the type is "MBR_MODEM_TYPE" or "MBR_MODEM_TYPE" .

2.re-build emmc_appsboot*.mbn and download them into the phone;

3.generate oemsbl.bin and emmc_appsboot.bin
the struct of the oemsbl.bin is
(oemsblhd.mbn + some 0x00) + oemsbl.mbn
|<----------512byte-------->|
the struct of the emmc_appsboot.bin is
(emmc_appsboothd.mbn + some 0x00) + emmc_appsboot.mbn
|<-------------512byte----------->|
you can download the pre-fastboot tool to generate these images.

chick here to download pre-fastboot:
https://docs.google.com/open?id=0B8FEzcDZzbOFZGRtOS1ZMmhPSm8

4.Then you can test to use the following command to download images in the fastboot mode:
fastboot flash qcsblhd_cfgdata qcsblhd_cfgdata.mbn
fastboot flash qcsbl qcsbl.mbn
fastboot flash oemsbl oemsb.bin
fastboot flash fat fat.bin
fastboot flash emmc_appsboot emmc_appsboot.bin