Hi, > From: Roman Mashak [mailto:[EMAIL PROTECTED] > Subject: Re: [U-Boot] PrimeCell Peripherals > > I'm a bit confused: 'do_irq' is defined in several files, > including CPU-specific (arm920t, 720t etc.) and ARM > architecture library ($(U_BOOT)/lib_arm). So if we build for > arm920t-based platform (provided that CONFIG_USE_IRQ is > defined), then which one will be actually compiled in resulting image?
Looking at uboot\cpu\arm920t\interrupts.c a. If ARM920_IRQ_CALLBACK is defined (which is only used in s3c2410), function is called which points to s3c2410_irq() b. if the platform is CONFIG_ARCH_INTEGRATOR, then it is assumed that it is for timer interrupt (which is not necessary be since timer interrupt is not enabled in integrator) Looking at uboot\cpu\arm720t\interrupts.c a. if CONFIG_S3C4510B is defined then platform specific interrupt handler is called ( IRQ_HANDLER[pending>>2].m_func() ) b. Noting for integrator c here is the interesting part Since LPC2292 uses the interrupt controller similar to VIC, It uses the VICVectAddr to get the respective function address & jumps to it. So, a similar function i.e., do_irq is needed for arm926ej-s. Again inside it, a similar steps as in lpc2292 can be done to jump to respective function. But i am not seeing anyone using this function yet. Regards Gururaja _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot