The problem with skyeye and csb337
hiyangxi at gmail.com
Fri Jun 15 19:28:35 UTC 2007
Today i try to resolve the problem of csb337 with skyeye,although i have not
got it ,but i got some progresses and i think i have known why the
ticker program can
not run with skyeye.
Problems with skyeye.
1)At91rm92 of skyeye has not implemented AIC completely.
1st.It has not implemented the 32 source vector registers.
2ed.When read the AIC_IVR,return the current interrupt number but not
the address of interrupt handler in Source vector registers .
I don't know why you guys implement it like this ,but in
wirte "The interrupt vector registers contains the vector
the user in the Source Vector Register corresponding to the
I guess linux does not use AIC's vector table to manage the
interrupt,so linux can
works well with this way,but in real hardware,read AIC_IVR
address of handler,and csb337 use AIC's source vector registers.
So i rewrite this part and i am going to wirte a completed AIC .
3rd.When wirte the AIC_EOICR,skyeye uses the data which be writen to this
register to unset the interrupt pending register.But manual
write like this
"The end of interrupt command register is used by the
to indicate that the interrupt treatment is complete.Any
value can be
Written because it is only necessary to make a write to
location to signal the end of interrupt treatment."
4rd. Sky eye has not implemented interrupt prioriy of AIC and the interrupt
nesting stacks,but without these tow features RTEMS also can run well
5rd.In at91rm92.h there are a lot of macro like
#define SOMETHING BASE+offset without
the brackets(BASE+offset),I think this is dangerous.
So i want to rewrite the at91rm9200 of skyeye .Kang shuo do you agree with
2)Problems with Rtems.
In the initialization process.
1st.It seems that after executed
Rtems has not enable the interrupt of clock
2ed.It seems that after disabled all the interrupt sources and
default_int_handler() at all 32 interrupt source vector
has not enabled the SYS interrupt source(number 1) of AIC
and also has
not installed the CLOCK interrupt handler(I guss rtems
managers to manage the interrupt of 32 lines.Because
there are more
than one devices use the same line,for example,system
clock and DBGU
use the same SYS interrupt source),but i can not find
where is the SYS
interrupt source manger,who can tell me?
Since the interrupt of SYS is disable ,there is not any
clock interupt can be
delivered to CPU ,without the clock interrupt,the system
is hang in idl
So i enable the interrupt of clock and SYS interrupt
source of AIC.Since
default_int_handler() is still in all 32 interrupt source
vector registers ,at
every clock interrupt ,the system traps into default_int_handler();
" raw_idt_notify has been called
raw_idt_notify has been called
..." on my screen.
Q1,Where is the code installs SYS interrupt handler?
Q2,Where is the code enables the interrupt of clock device and AIC?
I think code of Q1 contains code of Q2,and some unkonw reasons result in
system has not executed the code of Q1.
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