Boot commands and load addresses for loading linux kernel, dts file and init from RAM memory

Preetam Reddy

I am loading images through uart whcih is the only interface I have here on a custom board. What are the load addresses for the kernel, dts file and init files ?

over 10 years ago

0 Yordan Kovachev over 10 years ago

TI__Guru**** 161600 points

Hi Preetam

You can see these addresses in u-boot/include/configs/ti_armv7_common.h :
#define CONFIG_SYS_LOAD_ADDR 0x82000000
#define DEFAULT_LINUX_BOOT_ENV \
"loadaddr=0x82000000\0" \
"kernel_addr_r=0x82000000\0" \
"fdtaddr=0x88000000\0" \
"fdt_addr_r=0x88000000\0" \
"rdaddr=0x88080000\0" \
"ramdisk_addr_r=0x88080000\0" \
"bootm_size=0x10000000\0"

Best Regards,
Yordan

0 Preetam Reddy over 10 years ago in reply to Yordan Kovachev

Intellectual 635 points

Hi Yordan,

Can you also get me the bootm command i.e the correct boot command for booting from memory.

Regards,

Preetam

0 Yordan Kovachev over 10 years ago in reply to Preetam Reddy

TI__Guru**** 161600 points

Hi Preetam,

You use loadb <corresponding address> & use your terminal to send the image.

After you load you should execute bootm <kernel_addr> - <fdt_addr>

Best Regards,
Yordan

0 Preetam Reddy over 10 years ago in reply to Yordan Kovachev

Intellectual 635 points

How does bootargs get passed here. Or does args no longer matter because of dts file?

0 Yordan Kovachev over 10 years ago in reply to Preetam Reddy

TI__Guru**** 161600 points

Hi Preetam,

Sorry for the delayed response.

In the above commands you just replase <kernel_address> with 0x82000000, <fdt_addr> with 0x88000000

It is similar with the loadb command, you just enter the address where the corresponding image should be loaded.

Best Regards,
Yordan

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Boot commands and load addresses for loading linux kernel, dts file and init from RAM memory