[UBOOT] AM335x bootm trace（u-boot-2011.09）

do_run{arg = getenv (argv[i]));////run的参数从环境变量中获得run_command (arg, flag);}bootcmd=run nand_bootnand_boot=1.echo Booting from nand ...;   2.run nand_args;   nand_args=1.run bootargs_defaults;                       bootargs_defaults=setenv bootargs console=${console} ${optargs}      2.setenv bootargs ${bootargs} root=${nand_root} noinitrd rootfstype=${nand_root_fs_type} ip=${ip_method}*bootargs= console=ttyO0,115200n8 root=ubi0:rootfs rw ubi.mtd=3,2048 noinitrd rootfstype=ubifs rootwait=1 ip=none  3.nand read.i ${kloadaddr} ${nand_src_addr} ${nand_img_siz};    kloadaddr=0x80007fc0;nand_src_addr=0x280000;nand_img_siz=0x400000/4MB  4.bootm ${kloadaddr}  bootm 0x80007fc0=0x80008000-0x40do_bootm{bootm_start{bootm_start_lmb//??boot_get_kernel{genimg_get_format ((void *)img_addr); return IMAGE_FORMAT_LEGACYimage_get_kernel (img_addr, images->verify){image_check_magicimage_check_hcrc//对image_header进行crc校验image_print_contentsif (verify) image_check_dcrc//对数据区进行crc校验image_check_target_arch}case IH_TYPE_KERNEL:images.os.image_start : *os_data = image_get_data (hdr);//返回内核的入口点地址,0x80008000images.os.image_len   : *os_len = image_get_data_size (hdr);return (void *)img_addr;//0x80007fc0}images.os.type = image_get_type (os_hdr);images.os.comp = image_get_comp (os_hdr);images.os.os = image_get_os (os_hdr);images.os.end = image_get_image_end (os_hdr);images.os.load = image_get_load (os_hdr);/* find kernel entry point */images.ep = image_get_ep (&images.legacy_hdr_os_copy);//0x80008000boot_get_ramdisk//return 0,No init Ramdiskimages.os.start = (ulong)os_hdr;//0x80007fc0images.state = BOOTM_STATE_START;return 0;}disable_interrupts();usb_stop();bootm_load_os(images.os, &load_end, 1);{flush_cache(load, (*load_end - load) * sizeof(ulong));return BOOTM_ERR_OVERLAP;}lmb_reserveboot_fn = boot_os[images.os.os];//boot_os[5]=do_bootm_linuxarch_preboot_os();boot_fn(0, argc, argv, &images);//do_bootm_linux{intmachid = bd->bi_arch_number;//3589char *commandline = getenv ("bootargs");//console=ttyO0,115200n8 root=ubi0:rootfs rw ubi.mtd=3,2048 noinitrd rootfstype=ubifs rootwait=1 ip=nonekernel_entry = (void (*)(int, int, uint))images->ep;//0x80008000//TAG 设置setup_start_tag (bd);{params = (struct tag *) bd->bi_boot_params;//0x80000100params->hdr.tag = ATAG_CORE;params->hdr.size = tag_size (tag_core);params->u.core.flags = 0;params->u.core.pagesize = 0;params->u.core.rootdev = 0;params = tag_next (params);}setup_memory_tags (bd);setup_commandline_tag (bd, commandline);{params->hdr.tag = ATAG_CMDLINE;params->hdr.size =(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;strcpy (params->u.cmdline.cmdline, p);    params = tag_next (params);}setup_end_tag(bd);announce_and_cleanup();{cleanup_before_linux();*******{}}kernel_entry(0, machid, bd->bi_boot_params);//machid=3589;bd->bi_boot_params=0x80000100,保存tag/* does not return */ //跳转到Linux kernel执行}}