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[U-Boot] [RFC PATCH v1 0/6] SPL:...

Venky Venkatesh

23 Jun 2016 23 Jun '16

4:15 p.m.

Hi, How can i load the kernel by using first stage boot loader (MLO) directly, without giving the control to the second stage boot loader (i.e u-boot.bin). Here at the end of the first stage boot loader i want to load the kernel, so that i can boot the kernel by using x-loader directly. Give me suggestions

Thanks, Venkatesh

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Wolfgang Denk

23 Jun 23 Jun

8:23 p.m.

Dear Venky,

In message CAONbAMvq7fLPU1qkLrQp0HJiwesWtmXHqx9dLTy_R-GdmsZ=Tg@mail.gmail.com you wrote:

...

 How can i load the kernel by using first stage boot loader (MLO)

In U-Boot terminology, this is the SPL.

...

directly, without giving the control to the second stage boot loader (i.e u-boot.bin). Here at the end of the first stage boot loader i want to load the kernel, so that i can boot the kernel by using x-loader directly. Give me suggestions

This boot method is called "Falcon Mode". You want to read doc/README.falcon

Best regards,

Wolfgang Denk

-- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de Bus error -- driver executed.

Venky Venkatesh

24 Jun 24 Jun

5:04 a.m.

Thanks wolfgang,

Is there any possibility to modify the code and load the kernel at the end of the first stage boot so that i can skipp of the 2nd stage boot loader.

Thanks & Regards, Venkatesh On Jun 23, 2016 7:45 PM, "Venky Venkatesh" venkateshv377@gmail.com wrote:

...

Hi, How can i load the kernel by using first stage boot loader (MLO) directly, without giving the control to the second stage boot loader (i.e u-boot.bin). Here at the end of the first stage boot loader i want to load the kernel, so that i can boot the kernel by using x-loader directly. Give me suggestions

Thanks, Venkatesh

Wolfgang Denk

8:33 a.m.

Dear Venkatesh,

In message CAONbAMs0goUd+46fmcgu6KA+=Tqs0LTTv0iPKRM1vOC43JOKng@mail.gmail.com you wrote:

...

Is there any possibility to modify the code and load the kernel at the end of the first stage boot so that i can skipp of the 2nd stage boot loader.

Well - in U-Boot terminology, the 1st stage loader is the ROM boot loader (RBL). I am not aware of systems where the RBL can directly load and start a Linux kernel in a somewhat sane way. So you will always need at least the U-Boot SPL. But you can avoid loading and running the full-blown U-Boot itself - this is what Falcon Mode does.

Best regards,

Wolfgang Denk

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Venky Venkatesh
Wolfgang Denk