U-boot for Arm on Qemu

Question

I'm trying to run hello world program on u-boot (ver: u-boot-2010.03-rc3) for ARM on QEMU (ver: qemu-2.5.0)

So far, i have created

-Hello_World.bin

-HelloWorld.uimg using mkimage

-then combined Hello_World and U-Boot binaries into a single image and got flash_hello.bin

Now, when i run the below command,

./arm-softmmu/qemu-system-arm -M versatilepb -m 128M -serial stdio -kernel flash_hello.bin

QEMU popup is blank and when I enter bootm command with address of the kernel image

I'm getting following output on screen. Can anyone help me with this. Thanks in advance.

U-Boot 2010.03-rc3 (Mar 30 2016 - 19:35:25)

DRAM:   0 kB
Flash: 64 MB
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   SMC91111-0
VersatilePB # bootm 0x24E10
## Booting kernel from Legacy Image at 00024e10 ...
   Image Name:   
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    140 Bytes =  0.1 kB
   Load Address: 00100000
   Entry Point:  00100000
   Loading Kernel Image ... OK
OK

Starting kernel ...

 C� ��������                     <= This is the output instead of hello world

Contents of Helloworld.c:

volatile unsigned int * const UART0DR = (unsigned int *)0x101f1000;

void print_uart0(const char *s) {
 while(*s != '\0') { /* Loop until end of string */
       *UART0DR = (unsigned int)(*s); /* Transmit char */
       s++; /* Next char */
  }
}

void c_entry() {
  print_uart0("Hello world!\n");
}

`

What happens if you try and run the standard hello world example stand-alone application? — Tom Rini

gzh gzh · Accepted Answer · 2016-03-31T01:46:33

You did not provide information about how you created image files, it is difficult to tell where is wrong.

This article show you how to do it in details. You need to specify the data layout for your image file.

U-boot for Arm on Qemu

1 Answers