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NON-HLOS.bin文件是BP侧的一个镜像，最终被烧写到modem分区，但最近研究发现，其不仅仅包含modem镜像，它还包含ADSP镜像、Wcnss镜像、Venus镜像、Widevine镜像，还有一些安全相关的镜像。AP侧Init进程解析init.rc时，会通过kernel PIL驱动程序加载这些镜像，最终将相应的modem、ADSP等boot起来。
一、NON-HLOS.bin文件生成过程
编译文件：common/build/build.py，这个文件虽然有将近900行，但是最关键只有下面几行：
for step_elem in workflow_elem：
。。。。
step_dict = ml.XmlToDict(step_elem)
step_func = run_step[step_elem.attrib['type']]
step_func(step_dict)
其中step相关配置文件：contents.xml，其大概格式如下：
<workflow>
<step type="exec">
<params>。。。。。</params>
<tool_name>。。。。</tool_name>
<src_file_vars>。。。。。</src_file_vars>
<destn_dir>。。。。。。。</destn_dir>
</step>
</ workflow>
其中run_step定义如下：
run_step = {
'copy' : workflow_copy,
'exec' : workflow_exec,
'delete': workflow_delete,
'setenv': workflow_setenv
}
workflow_copy，workflow_exec，workflow_delete三个接口，恰好对应build.py脚本定义的三个函数，本文以workflow_exec为例简要说明其编译过程：
1、解析xml文件，获取setp配置内容，并放置在step_dict
2、根据xml文件type值选取合适的接口，如果step配置内容中type=exec，则相应接口为workflow_exec函数
3、调用workflow_exec函数，并将step_dict作为参数传递进去
（1） 首先调用preprocess_step函数，从参数step_dict获取step中各项配置
（2）params = ml.evaluate_params(step_dict_flavor)获取params属性中各个变量的值
（3）lg.log_exec(params)，执行params属性中的命令
根据contents.xml文件中的配置，总结编译common过程如下：
1、使用pil-splitter.py工具，将相应image中属性含有pil_split进行分解
2、如果common/build/bin/asic目录下已存在non-hlos.bin文件，则删除non-hlos.bin文件
3、使用fat_creation.py工具重新生成non-hlos.bin文件
4、使用fatadd.py工具向non-hlos.bin文件添加Ver_Info.txt中内容
5、使用ptool.py工具生成相应的分区文件
6、使用checksparse.py工具分解AP的system.img，userdata.img等镜像
二、NON-HLOS.bin文件中各个子系统镜像加载过程
1、dts配置：
pil_mss: qcom,mss@4080000 {
compatible = "qcom,pil-q6v55-mss";
。。。。。。
qcom,firmware-name = "modem";
。。。。。。
};
qcom,lpass@c200000 {
compatible = "qcom,pil-tz-generic";
。。。。。。
qcom,firmware-name = "adsp";
。。。。。
};
qcom,pronto@a21b000 {
compatible = "qcom,pil-tz-generic";
。。。。。
qcom,firmware-name = "wcnss";
。。。。。
};
qcom,venus@1de0000 {
compatible = "qcom,pil-tz-generic";
。。。。。。
qcom,firmware-name = "venus";
。。。。。。
};
相应的驱动文件如下：
kernel/drivers/soc/qcom/peripheral-loader.c
kernel/drivers/soc/qcom/subsys-pil-tz.c
kernel/drivers/soc/qcom/pil-q6v5-mss.c
还需要rc文件帮忙哦，呵呵
device/qcom/common/rootdir/etc/init.qcom.rc
on early-boot
。。。。。
write /sys/kernel/boot_adsp/boot 1
write /sys/kernel/boot_cdsp/boot 1
write /sys/kernel/boot_slpi/boot 1
从上面可知，当手机启动到kernel阶段，PIL驱动只是注册了相关设备节点，并没有发生image加载过程，直至init进程解析init.rc文件，触发了early-boot，会向对应设备节点写1，从而触发各个image加载。具体信息请参考下面log部分。
对应加载镜像log如下：
[32m[ 22.662154] [33mueventd[0m: firmware: loading 'adsp.mdt' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.mdt'
[32m[ 22.673573] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.mdt took 11ms
[32m[ 22.697783] [33mueventd[0m: firmware: loading 'adsp.b02' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b02'
[32m[ 22.708059] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b02 took 10ms
[32m[ 22.709360] [33mueventd[0m: firmware: loading 'adsp.b03' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b03'
[32m[ 22.722718] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b03 took 13ms
[32m[ 22.724127] [33mueventd[0m: firmware: loading 'adsp.b04' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b04'
[32m[ 22.815294] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b04 took 91ms
[32m[ 22.819632] [33mueventd[0m: firmware: loading 'adsp.b05' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b05'
[32m[ 22.833835] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b05 took 14ms
[32m[ 22.846304] [33mueventd[0m: firmware: loading 'adsp.b06' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b06'
[32m[ 22.856574] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b06 took 10ms
[32m[ 22.864284] [33mueventd[0m: firmware: loading 'adsp.b07' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b07'
[32m[ 22.878686] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b07 took 14ms
[32m[ 22.880281] [33mueventd[0m: firmware: loading 'adsp.b08' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b08'
[32m[ 22.887248] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b08 took 7ms
[32m[ 22.888683] [33mueventd[0m: firmware: loading 'adsp.b09' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b09'
[32m[ 22.890738] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b09 took 2ms
[32m[ 22.891924] [33mueventd[0m: firmware: loading 'adsp.b10' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b10'
[32m[ 22.903149] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b10 took 11ms
[32m[ 22.904425] [33mueventd[0m: firmware: loading 'adsp.b11' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b11'
[32m[ 22.906310] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b11 took 2ms
[32m[ 22.908389] [33mueventd[0m: firmware: loading 'adsp.b12' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b12'
[32m[ 22.910388] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b12 took 2ms
[32m[ 22.911522] [33mueventd[0m: firmware: loading 'adsp.b13' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b13'
[32m[ 22.913799] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b13 took 2ms
[32m[ 22.914907] [33mueventd[0m: firmware: loading 'adsp.b14' for '/devices/soc/c200000.qcom,lpass/firmware/adsp.b14'
[32m[ 22.917846] [33mueventd[0m: loading /devices/soc/c200000.qcom,lpass/firmware/adsp.b14 took 3ms
[32m[ 22.918879] [33mueventd (499) used greatest stack depth[0m: 11184 bytes left
[32m[ 24.449519] [33mueventd[0m: firmware: loading 'modem.mdt' for '/devices/soc/4080000.qcom,mss/firmware/modem.mdt'
[32m[ 24.451413] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.mdt took 2ms
[32m[ 24.459602] [33mueventd[0m: firmware: loading 'mba.mbn' for '/devices/soc/4080000.qcom,mss/firmware/mba.mbn'
[32m[ 24.470243] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/mba.mbn took 10ms
[32m[ 24.474895] [33mueventd[0m: firmware: loading 'msadp' for '/devices/soc/4080000.qcom,mss/firmware/msadp'
[32m[ 24.478516] [33mueventd[31m: firmware: could not find firmware for msadp
[32m[ 24.486109] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/msadp took 11ms
[32m[ 24.570507] [33mueventd[0m: firmware: loading 'a530_pm4.fw' for '/devices/soc/1c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/a530_pm4.fw'
[32m[ 24.572554] [33mueventd[0m: loading /devices/soc/1c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/a530_pm4.fw took 2ms
[32m[ 24.603141] [33mueventd[0m: firmware: loading 'a530_pfp.fw' for '/devices/soc/1c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/a530_pfp.fw'
[32m[ 24.606785] [33mueventd[0m: loading /devices/soc/1c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/a530_pfp.fw took 4ms
[32m[ 24.636679] [33mueventd[31m: selinux_android_restorecon(/sys/devices/soc/1c00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/a530_pfp.fw) failed: Success
[32m[ 24.649677] [33mueventd[0m: firmware: loading 'modem.b02' for '/devices/soc/4080000.qcom,mss/firmware/modem.b02'
[32m[ 24.661766] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b02 took 12ms
[32m[ 24.665311] [33mueventd[0m: firmware: loading 'modem.b04' for '/devices/soc/4080000.qcom,mss/firmware/modem.b04'
[32m[ 24.673339] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b04 took 9ms
[32m[ 24.682134] [33mueventd[0m: firmware: loading 'modem.b05' for '/devices/soc/4080000.qcom,mss/firmware/modem.b05'
[32m[ 24.685698] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b05 took 3ms
[32m[ 24.690788] [33mueventd[0m: firmware: loading 'modem.b06' for '/devices/soc/4080000.qcom,mss/firmware/modem.b06'
[32m[ 24.701809] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b06 took 11ms
[32m[ 24.706323] [33mueventd[0m: firmware: loading 'modem.b07' for '/devices/soc/4080000.qcom,mss/firmware/modem.b07'
[32m[ 24.715939] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b07 took 9ms
[32m[ 24.717611] [33mueventd[0m: firmware: loading 'modem.b08' for '/devices/soc/4080000.qcom,mss/firmware/modem.b08'
[32m[ 24.733548] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b08 took 16ms
[32m[ 24.735186] [33mueventd[0m: firmware: loading 'modem.b09' for '/devices/soc/4080000.qcom,mss/firmware/modem.b09'
[32m[ 24.756318] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b09 took 21ms
[32m[ 24.761443] [33mueventd[0m: firmware: loading 'modem.b10' for '/devices/soc/4080000.qcom,mss/firmware/modem.b10'
[32m[ 24.940472] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b10 took 179ms
[32m[ 24.942092] [33mueventd[0m: firmware: loading 'modem.b11' for '/devices/soc/4080000.qcom,mss/firmware/modem.b11'
[32m[ 24.951367] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b11 took 9ms
[32m[ 24.953021] [33mueventd[0m: firmware: loading 'modem.b12' for '/devices/soc/4080000.qcom,mss/firmware/modem.b12'
[32m[ 25.014103] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b12 took 61ms
[32m[ 25.027603] [33mueventd[0m: firmware: loading 'modem.b13' for '/devices/soc/4080000.qcom,mss/firmware/modem.b13'
[32m[ 25.050447] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b13 took 23ms
[32m[ 25.141670] [33mueventd[0m: firmware: loading 'modem.b16' for '/devices/soc/4080000.qcom,mss/firmware/modem.b16'
[32m[ 25.153330] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b16 took 12ms
[32m[ 25.170805] [33mueventd[0m: firmware: loading 'modem.b17' for '/devices/soc/4080000.qcom,mss/firmware/modem.b17'
[32m[ 25.187436] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b17 took 17ms
[32m[ 25.189230] [33mueventd[0m: firmware: loading 'modem.b18' for '/devices/soc/4080000.qcom,mss/firmware/modem.b18'
[32m[ 25.292187] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b18 took 103ms
[32m[ 25.293819] [33mueventd[0m: firmware: loading 'modem.b19' for '/devices/soc/4080000.qcom,mss/firmware/modem.b19'
[32m[ 25.296124] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b19 took 2ms
[32m[ 25.297689] [33mueventd[0m: firmware: loading 'modem.b20' for '/devices/soc/4080000.qcom,mss/firmware/modem.b20'
[32m[ 25.308058] [33mueventd[0m: loading /devices/soc/4080000.qcom,mss/firmware/modem.b20 took 10ms
[32m[ 45.810862] [33mueventd[0m: firmware: loading 'wcnss.mdt' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.mdt'
[32m[ 45.815055] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.mdt took 4ms
[32m[ 45.894831] [33mueventd[0m: firmware: loading 'wcnss.b02' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b02'
[32m[ 45.904917] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b02 took 10ms
[32m[ 45.935031] [33mueventd[0m: firmware: loading 'wcnss.b04' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b04'
[32m[ 45.948467] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b04 took 13ms
[32m[ 45.958084] [33mueventd[0m: firmware: loading 'wcnss.b06' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b06'
[32m[ 46.062139] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b06 took 104ms
[32m[ 46.067050] [33mueventd[0m: firmware: loading 'wcnss.b09' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b09'
[32m[ 46.075972] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b09 took 9ms
[32m[ 46.077078] [33mueventd[0m: firmware: loading 'wcnss.b10' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b10'
[32m[ 46.083643] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b10 took 6ms
[32m[ 46.087139] [33mueventd[0m: firmware: loading 'wcnss.b11' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b11'
[32m[ 46.103695] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b11 took 17ms
[32m[ 46.105562] [33mueventd[0m: firmware: loading 'wcnss.b12' for '/devices/soc/a21b000.qcom,pronto/firmware/wcnss.b12'
[32m[ 46.110580] [33mueventd[0m: loading /devices/soc/a21b000.qcom,pronto/firmware/wcnss.b12 took 5ms
[32m[ 49.471679] [33mueventd[0m: firmware: loading 'wlan/prima/WCNSS_qcom_wlan_nv.bin' for '/devices/soc/a000000.qcom,wcnss-wlan/firmware/wlan!prima!WCNSS_qcom_wlan_nv.bin'
[32m[ 49.481196] [33mueventd[0m: loading /devices/soc/a000000.qcom,wcnss-wlan/firmware/wlan!prima!WCNSS_qcom_wlan_nv.bin took 9ms
[32m[ 50.569611] [33mueventd[0m: firmware: loading 'cpp_firmware_v1_5_0.fw' for '/devices/soc/1b04000.qcom,cpp/firmware/cpp_firmware_v1_5_0.fw'
[32m[ 50.571325] [33mueventd[0m: loading /devices/soc/1b04000.qcom,cpp/firmware/cpp_firmware_v1_5_0.fw took 2ms
[32m[ 54.060534] [33mueventd[0m: firmware: loading 'venus.mdt' for '/devices/soc/1de0000.qcom,venus/firmware/venus.mdt'
[32m[ 54.062479] [33mueventd[0m: loading /devices/soc/1de0000.qcom,venus/firmware/venus.mdt took 2ms
[32m[ 54.087649] [33mueventd[0m: firmware: loading 'venus.b02' for '/devices/soc/1de0000.qcom,venus/firmware/venus.b02'
[32m[ 54.097163] [33mueventd[0m: loading /devices/soc/1de0000.qcom,venus/firmware/venus.b02 took 9ms
[32m[ 54.102347] [33mueventd[0m: firmware: loading 'venus.b03' for '/devices/soc/1de0000.qcom,venus/firmware/venus.b03'
[32m[ 54.107897] [33mueventd[0m: loading /devices/soc/1de0000.qcom,venus/firmware/venus.b03 took 9ms
[32m[ 54.108590] [33mueventd[0m: firmware: loading 'venus.b04' for '/devices/soc/1de0000.qcom,venus/firmware/venus.b04'
[32m[ 54.111195] [33mueventd[0m: loading /devices/soc/1de0000.qcom,venus/firmware/venus.b04 took 2ms
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