U-Boot

How do I find ARM Linux entry point when it fails to uncompress?

由 吃可爱长大的小学妹 提交于 2019-11-27 02:06:25
I am trying to boot Linux via U-boot on a custom board with i.MX6 (CPU core is ARM Cortex A9) We seem to have ported Das U-Boot(2009.08) successfully. But booting Linux fails at the last U-Boot message: "Starting kernel ..." Here is my relevant environment: bootargs=console=ttymxc1,115200 vmalloc=400M root=/dev/mmcblk0p1 rootwait consoleblank=0 earlyprintk video=mxcfb0:dev=lcd,LCD-ORTUS,if=RGB24 video=mxcfb1:dev=hdmi,1280x720M@60,if=RGB24 calibration tsdev=tsc2004 fbmem=10M,28M bootcmd=ext2load mmc 0:1 10800000 /boot/uImage ; bootm 10800000 The boot output is Loading file "/boot/uImage" from

How to run custom kernel on beaglebone?

由 天大地大妈咪最大 提交于 2019-11-26 23:40:01
问题 I am starting kernel or operating system programming for beaglebone with TI - AM3359 SoC. I have written an assembly program to write some characters to the serial interface (just to start off with) and i want to run this as kernel on beaglebone, just like linux kernel. what is the linking address for my program? and How to boot it from u-boot by default? I don't want to get into u boot programming and want to use the available u-boot which came with angstrom distribution along with the BBone

Image vs zImage vs uImage

由 五迷三道 提交于 2019-11-26 21:25:33
What is the difference between them? I know that u-boot needs a kernel in uImage format. The system I use first boots from stage 1 loader and then it calls u-boot. I want to discard u-boot and directly boot from stage 1 loader. Which type of kernel image do I have to use? What is the difference between them? Image : the generic Linux kernel binary image file. zImage : a compressed version of the Linux kernel image that is self-extracting. uImage : an image file that has a U-Boot wrapper (installed by the mkimage utility) that includes the OS type and loader information. A very common practice

Pass large amount of binary data from u-boot to linux kernel

由 前提是你 提交于 2019-11-26 18:16:37
问题 Have some issues with passing large amount of data (3 MB) from uboot to linux kernel 2.6.35.3 on imx50 ARM board. This data is required in kernel device driver probe function and then it should be released. First uboot load data from flash to RAM, then pass physical address for linux kernel using bootargs. In kernel I try to reserve certain amount of memory using reserve_resource() in arch/arm/kernel/setup.c file: --- a/arch/arm/kernel/setup.c Tue Jul 17 11:22:39 2012 +0300 +++ b/arch/arm

Image vs zImage vs uImage

由 扶醉桌前 提交于 2019-11-26 07:56:00
问题 What is the difference between them? I know that u-boot needs a kernel in uImage format. The system I use first boots from stage 1 loader and then it calls u-boot. I want to discard u-boot and directly boot from stage 1 loader. Which type of kernel image do I have to use? 回答1: What is the difference between them? Image : the generic Linux kernel binary image file. zImage : a compressed version of the Linux kernel image that is self-extracting. uImage : an image file that has a U-Boot wrapper

移植linux4.14内核到4412开发板

由 你。 提交于 2019-11-25 23:10:46
最近法师收到了很多留言，其中有一部分问法师什么时候更新，还有一大部分问法师我是买 迅为的IMX6UL精英版好呢还是买4412精英版好呢 ，因为我们这俩个都不贵。法师的建议的是入手4412！为什么呢？ 第一，4412是三星第一款经典处理器，为三星创造了辉煌，是当年在国内红得发紫的GalaxyS3手机的主控，他的出现，开启了手机和平板的四核时代，让手机和平板变得流畅，可以说，到目前为止，4412上用到的技术，仍是当前的主流技术，其他的处理器并没有质的飞跃，同样，经过7年以上各行各业的考验，已经非常的稳定。而且四核处理器系统可以实现动态调频调压，所以，我们一个板子不仅可以学习uboot，linux，裸机，还可学习安卓，一个板子就足够了。 第二，经过多年的累积，4412已经积累了海量的开发资料。 第三，也是最重要的一点！！！ 2017 年 6 月份左右，迅为电子 iTOP 系列开发平台 iTOP-4412 的 SCP 核心板，得到世界最大开源软件 Linux 的官方支持，这意味着从linux官方www.kernel.orrg下载的最新内核稍加修改就可以直接在ITOP4412上运行，极大方便用户产品的技术升级。 所以，一个既能运行安卓，ubuntu，QT系统，还被linux官方支持的开发板四五百元就可以入手，他不香嘛~~ 另外如果是迅为的老用户，再次在官方店购买我的产品
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