Re: [microblaze-uclinux] Compiling uClinux on MicroBlaze

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Ashish,

Ashish Darbari wrote:

> Have been struggling with this for a while, does anyone have a clue? My 
> .mhs and .mss is attached.

What Jose was trying to explain to you, is that you still have not 
connected the interrupt signal from the opb_timer to the interrupt 
controller.  See below:


> BEGIN opb_intc
>  PARAMETER INSTANCE = opb_intc_0
>  PARAMETER HW_VER = 1.00.c
>  PARAMETER C_BASEADDR = 0x41200000
>  PARAMETER C_HIGHADDR = 0x4120ffff
>  BUS_INTERFACE SOPB = mb_opb
>  PORT Irq = Interrupt
>  PORT Intr = RS232_Uart_1_Interrupt & SysACE_CompactFlash_SysACE_IRQ & LEDs_4Bit_IP2INTC_Irpt
> END

> BEGIN opb_timer
>  PARAMETER INSTANCE = opb_timer_0
>  PARAMETER HW_VER = 1.00.b
>  PARAMETER C_ONE_TIMER_ONLY = 1
>  BUS_INTERFACE SOPB = mb_opb

  PARAMETER C_BASEADDR = ????
  PARAMETER C_HIGHADDR = ???

  PORT Interrupt = timer_irq

> END


There are several problems here.

1. You haven't assigned base or high addresses to the OPB_TIMER - this 
is why the BASEADDR was 0xffffffff - basically for EDK that means it was 
unassigned.  Use EDK / platform studio to assign an address.

2. There is no connection from the timer's interrupt port - again use 
EDK to do this

3. The (missing) timer interrupt port, is not connected to the interrupt 
controller.  The line in the opb_intc block, shold be something like this:

PORT Intr = RS232_Uart_1_Interrupt & SysACE_CompactFlash_SysACE_IRQ & 
LEDs_4Bit_IP2INTC_Irpt & timer_irq

That will get your hardware pretty much sorted out.

I recommend you take a look at the reference designs provided by Xilinx, 
or in PetaLinux (hardware/reference-designs) - they show the basic 
requried structure of a microblaze system required if you want to run 
Linux on it.

Also, it sounds like you would benefit from doing some of the EDK 
tutorials on things like adding peripherals, assigning base addresses 
and so on.  It will make your life a lot easier if you have a strong 
understanding of what's going on underneath.

Regards,

John




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