[okl4-developer] About serial and timer driver for ARM926ej-s

[kashin Lin]

Hi,

i
have compiled okl4 image for arm926 successfully by doing some
modification and setting as below:

machine.py in platform/pxa/tools add :
class davinci(arm926ejs):
   virtual = False
   platform = "pxa"
   platform_dir = "pxa"
   timer_driver = "pxa250_timer"
   uart = "FFUART"
   subplatform = "pxa255"
   drivers = [timer_driver] + xscale.drivers
   device_core = "davinci"
   v2_drivers = [ ("pxa250_timer", "vtimer"), ("uart_8250", "vserial"),]
   skyeye = "davinci.skyeye"
   memory = arm926ejs.memory.copy()
   memory['physical'] = [(0x80000000L, 0x8FFFFFFFL)]
   cpp_defines = arm926ejs.cpp_defines + [("PLATFORM_PXA", 1),
("SERIAL_FFUART", 1)]
   run_methods = copy.copy(arm926ejs.run_methods)

in arch/arm/pistachio/cpu/arm926ejs/include/cpu.h add two line:
   #include <arch/asm.h>
   #define IODEVICE_VADDR IO_AREA0_VADDR

after those, i issue "./tool/build.py machine=davinci project=iguana
example=naming" to build image.
but when i load the image to my target and run, nothing happened... (no any
messages showed through uart)
i think the cause
may be the serial and timer driver, because arm926 has different memory map
from xscale.

how should i modify the serial and timer driver if i know the UART and
timer's PHY memory base and IRQ# ?
(it seems okl4 use vtimer and vserial server for above machine.py)
or i just shouldn't use "pxa250_timer" and "uart_8250" driver?
or are there anything else may cause this situation happened?

it's important to me to port okl4 to arm926ejs-base platform. i really need
some help.
any suggestions and hints will be welcome.


thanks in advance.



best regard,

kashin lin
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