[microblaze-uclinux] uclinux port to Multimedia board

["Christopher John Comis" <comis@xxxxxxxxxxxxxxxx>]

Hi,

I am wondering if any of you could please help me out.  I am trying to port
to the Xilinx Multimedia board.  I made several modifications to accommodate
the mbvanilla platform to my board:
- I removed the DDR
- I removed cache from the microblaze (which used the DDR memory)
- I replaced the sram_flash emc with an emc for my ZBT RAM.  I then set the
base addresses as follows: 
- I set 1MB of my ZBT RAM to base address 0xFE000000-0xFEFFFFFF
- I set 8MB of my ZBT RAM to base address 0xFF000000-0xFF7FFFFF (note that
this memory is actually divided across 4x2MB banks)
- I modified the DCM clocking mechanism (first DCM is for the opb, second
DCM is for the onboard ZBT memory)

I can download the platform, launch mdm and ran a memory test that verifies
the memory is instantiated correctly.

I made the following modifications to the uclinux platform:
- I adjusted mbvanilla.h as follows:
#define ERAM_ADDR 0xFFE00000
#define ERAM_SIZE 0x00100000 
- I adjusted the address space of mbvanilla.ld as follows:
OPB  : ORIGIN = 0xFFE00000, LENGTH = 0x00100000
- I verified that the following options were set in config.linux-2.4.x
# CONFIG_MICROBLAZE_ICACHE is not set
# CONFIG_MICROBLAZE_DCACHE is not set

When I launch mdm, download and run image.elf, things are smooth until the
line:
Calibrating delay loop...
At which point the program freezes.

Reading previous posts, my intc interrupt port is set as follows:
PORT Intr = Ethernet_MAC_IP2INTC_Irpt & debug_uart_interrupt &
console_uart_interrupt & timer_interrupt 
(note that my dummy debug uart is connected to a LED for output and a switch
for input)
I also modified the config.linux-2.4.x under both cases: 
CONFIG_MICROBLAZE_HARD_MULT=y
CONFIG_MICROBLAZE_HARD_MULT=n

Am I missing something?  Can someone (anyone??) please help me out?
Thanks
Chris


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