[U-Boot] Booting armv8 kernel on uboot

[fenghua at phytium.com.cn]

hi Tom,

> On Thu, May 22, 2014 at 10:26:17PM +0800, fenghua at phytium.com.cn wrote:
>> 
>> 
>>> Hi ,
>>> I have added mmc driver into the vexpress64 board file for uboot and tested
>>> it on FVP base model. I tried booting a kernel on that but it is aborting
>>> with the following message:
>>> Final value for argc=3
>>>  Loading Kernel Image ... OK
>>>  kernel loaded at 0x00080000, end = 0x00827024
>>> using: FDT
>>>  reserving fdt memory region: addr=80000000 size=10000
>>> ## initrd_high = 0xffffffffffffffff, copy_to_ram = 1
>>>  ramdisk load start = 0x00000000, ramdisk load end = 0x00000000
>>> ## device tree at 0000000090008000 ... 000000009000a850 (len=22609 [0x5851])
>>>  Loading Device Tree to 000000009fffa000, end 000000009ffff850 ... OK
>>> Initial value for argc=3
>>> Final value for argc=3
>>> ## Transferring control to Linux (at address 80000)...
>>> Starting kernel ...
>>> 
>>> "Synchronous Abort" handler, esr 0x02000000
>>> ELR:     80000
>>> LR:      fff90fc8
>>> x0 : 000000009fffa000 x1 : 000000001c090000
>>> x2 : 000000001c090000 x3 : 0000000000000020
>>> x4 : 00000000fff6b834 x5 : 0000000000000000
>>> x6 : 00000000fff6bb40 x7 : 00000000ffffffd0
>>> x8 : 000000000000000f x9 : 000000007ff8e000
>>> x10: 00000000fffb7188 x11: 0000000000000000
>>> x12: 0000000000006000 x13: 0000000000000004
>>> x14: 0000000000000003 x15: 00000000fffc7c20
>>> x16: 0000000000000000 x17: 0000000000000000
>>> x18: 00000000fff6beb8 x19: 0000000000080000
>>> x20: 00000000fffc7a70 x21: 0000000000000000
>>> x22: 0000000000000000 x23: 00000000fff6d8d8
>>> x24: 0000000000000000 x25: 00000000fffc2630
>>> x26: 0000000000000000 x27: 0000000080008000
>>> x28: 0000000000000000 x29: 00000000fff6bb40
>>> 
>>> Can anyone please provide the procedure on how to boot the kernel with
>>> u-boot on armv8 models ?
>> I always use mkimage converting kernel to uImage and booting it. It works fine.
>> Wish this help you.
> 
> Which version of the model are you using and which kernel tree?  Thanks!
> 
The model is the most recent FVP from linaro website and the kernel is a very old one.
But mkimage has nothing to do with the kernel. uImage produced
by mkimage is correctly loaded by u-boot for aarch64. 
I will make a test with the most recently kernel and give you feedback.

Best regards,
David