四、跳转到start_kernel(这也是内核的第一个c函数start_kernel) ldr r13, __switch_data start_kernel 内核的启动流程参照开发手册上面的一幅图 大致总结一下内核的启动流程: arch/am/kernel/head.S start_kernel setup_arch //解析uboot传入的启动参数 setup_command_line(command_line);//解析uboot传入的启动...
1. 2. 3. 4. 5. 6. 7. 8. 9. 3.Kernel部分 saved_command_line 这是一个全局变量,在您所需要此参数的driver文件中,extern saved_command_line变量, 通过查找 cus_param 的字符串即可: char * ptr; int cus_param; ptr = strstr(saved_command_line, "cus_param="); ptr += strlen("cus_param...
command_line = android_assemble_cmdline(slot_suffix, mode_cmdline, normal_boot, android_image_get_kernel_cmdline(boot_info), android_image_is_bootconfig_used(boot_info), avb_cmdline); env_set("bootargs", command_line); debug("ANDROID: bootargs: \"%s\"\n", command_line); android_bootload...
strlen += sprintf(commanline, "%s cus_param=%1d", commanline, g_boot_arg->cus_param); //mediatek add 3.Kernel部分 saved_command_line 这是一个全局变量,在您所须要此參数的driver文件里。extern saved_command_line变量。 通过查找 cus_param 的字符串就可以: char * ptr; int cus_param; ptr...
static void export_kernel_boot_props() { struct { const char *src_prop; const char *dst_prop; const char *default_value; } prop_map[] = { { "ro.boot.serialno", "ro.serialno", "", }, { "ro.boot.mode", "ro.bootmode", "unknown", }, { "ro.boot.baseband", "ro.baseband...
// properties set in DT always have priority over the command-line ones. process_kernel_dt(); process_kernel_cmdline(); // Propagate the kernel variables to internal variables // used by init as well as the current required properties. ...
8388608 bytes SDRAM reserved for cmm at 0x5d3f9000 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024 Kernel command line: root=/dev/mtdblock2 rootfstype=yaffs2 init=/linuxrc console=ttySAC0,115200 PID hash table entries: 1024 (order: 0, 4096 bytes) Dentry cache...
= 0) ** 2. second is optional (second_size == 0 -> no second) ** 3. load each element (kernel, ramdisk, second) at ** the specified physical address (kernel_addr, etc) ** 4. prepare tags at tag_addr. kernel_args[] is ** appended to the kernel commandline in the tags. *...
因为我们要研究的是过渡阶段,而不是整个启动流程。(后面会研究的。)这里直接看第三个--start_kernel阶段。 asmlinkagevoid__initstart_kernel(void) { ………. ……….. printk(KERN_NOTICE); printk(linux_banner); setup_arch(&command_line); setup_command_line(command...
这里直接看第三个--start_kernel阶段。 asmlinkage void __init start_kernel(void) { ………. ……….. printk(KERN_NOTICE); printk(linux_banner); setup_arch(&command_line); setup_command_line(command_line); parse_early_param(); parse_args("Booting kernel",static_command_line, __start_...