bootd - boot default, i.e., run 'bootcmd' bootelf - Boot from an ELF image in memory bootm - 从内存启动应用程序 bootp - 通过使用BOOTP / TFTP协议的网络引导映像 bootvx - Boot vxWorks from an ELF image chpart - 更改活动分区 cmp - memory compare coninfo - ...
②检测系统内存映射(memory map):准备识别在整个 4GB 物理地址空间中有哪些地址范围被分配用来寻址系统的 RAM单元; ③将 kernel 映像和根文件系统映像从 flash 上读到 RAM 空间中; ④为内核设置启动参数; ⑤调用内核:跳至内核代码入口开始执行。 2. Uboot代码结构分析 开发环境:我使用的是JZ2440开发板,处理器是...
, {r3 - r10} @ copy to target address [r1] cmp r0, r2 @ until source end address [r2] bne next @ loop until equal */ #if !defined(CONFIG_SYS_NAND_BOOT) && !defined(CONFIG_SYS_ONENAND_BOOT) /* No need to copy/exec the clock code - DPLL adjust already done * in NAND/oneN...
/* Pending Interrupt Clear */ str r5, [r0, #0xf00] @INTADDRESS str r5, [r1, #0xf00] @INTADDRESS str r5, [r2, #0xf00] @INTADDRESS bl uart_asm_init// 只是设置了gpio的功能,波特率的设置在第二阶段 #if1// 改动的部分 /* init system clock */ bl system_clock_init// 基本上没...
RAM used by U-Boot*/unsignedlongrelocaddr;/*Start address of U-Boot in RAM*/phys_size_t ram_size;/*RAM size*/#ifdef CONFIG_SYS_MEM_RESERVE_SECURE#defineMEM_RESERVE_SECURE_SECURED 0x1#defineMEM_RESERVE_SECURE_MAINTAINED 0x2#defineMEM_RESERVE_SECURE_ADDR_MASK (~0x3)/** Secure memory ...
fatload-fatload-load binary file from a dos filesystemUsage:fatload<interface><dev[:part]><addr><filename>[bytes]-load binary file'filename'from'dev'on'interface'to address'addr'from dos filesystem 参数说明: 代码语言:javascript 代码运行次数:0 ...
, {r3 - r10} @ copy to target address [r1]cmp r0, r2 @ until source end address [r2]bne next @ loop until equal */#if !defined(CONFIG_SYS_NAND_BOOT) && !defined(CONFIG_SYS_ONENAND_BOOT)/* No need to copy/exec the clock code - DPLL adjust already done* in NAND/oneNAND ...
bash-4.2# tools/mkimage -l u-boot.img Image Name: U-Boot 2014.04-rc2-10390-g96510e Created: Sun Jun 29 16:51:19 2014 Image Type: ARM U-Boot Firmware (uncompressed) Data Size: 240744 Bytes = 235.10 kB = 0.23 MB Load Address: 4a000000 Entry Point: 00000000 根据该头部信息,我们得知SP...
- boot application image stored in memory passing arguments 'arg ...'; when booting aLinuxkernel, 'arg' can be the address of an initrd image //传递参数的参数…”;当引导Linux内核,“参数”可以是映像文件的地址 Sub-commands to do part of the bootm sequence. The sub-commands must be...
*/mov ip,lr/* perserve link reg across call */bl lowlevel_init/* go setup pll,mux,memory */mov lr,ip/* restore link */mov pc,lr/* back to my caller */#endif/* CONFIG_SKIP_LOWLEVEL_INIT */ cpu_init_crit主要是对内存的一些初始化,初学者可以不用关注,即便是工作了也很少会涉及到...