readme.txt

linux内核不提供fiq的驱动的

armISR provides a number of routines for handing IRQ &/or FIQ (enable,
disable, & restore).  It also contains ISR & FSR entry & exit MACROs
which are used in interrupt routines.
NOTEs:
1) armISR.c MUST be compiled in ARM mode (not Thumb).  Use the gcc
   -mthumb-interwork switch if it will be called from Thumb mode code.
2) when using the MACROs, the C code interrupt routine must be declared
   with the 'naked' attribute.

void xxxISR(void) __attribute__((naked));

void xxxISR(void)
  {
  ISR_ENTRY(); 

  // ISR code goes here
  // don't forget to signal end-of-interrupt to AIC_EOICR

  ISR_EXIT();  // recover registers and return
  }

&xxxISR can be put into the appropriate AIC_SVR

Enjoy
-Bill Knight
R O SOftWare &
http://www.theARMPatch.com