On Fri, Jan 15, 2010 at 05:35:20PM -0800, Tony Lindgren wrote: > -#ifndef CONFIG_ARCH_OMAP4 > +#if defined(CONFIG_ARCH_OMAP2420) || defined(CONFIG_ARCH_OMAP2430) || \ > + defined(CONFIG_ARCH_OMAP34XX) > + > +#define INTCPS_SIR_IRQ_OFFSET 0x0040 /* Active interrupt > offset */ > +#define ACTIVEIRQ_MASK 0x7f /* Active interrupt > bits */ > + > +omap_irq_base: .word 0x0
You have no idea where this word will be placed - it could be in the middle of a read only section, which might really be read only. It might also be out of reach of the "ldr \base, [pc, #offset]" instructions you're using below - which is what an "ldr \base, address" instruction really is. > + > .macro get_irqnr_and_base, irqnr, irqstat, base, tmp > - ldr \base, =OMAP2_VA_IC_BASE > - ldr \irqnr, [\base, #0x98] /* IRQ pending reg 1 */ > + ldr \base, omap_irq_base > + cmp \base, #0 @ is irq base configured? > + bne 9998f @ already configured First thing, why not use get_irqnr_preamble to load the base address? That means you only do all this computation once per group of IRQs processed. Secondly, is this really worth the overhead, or can't you move omap_irq_base into the data section, and have your IRQ initialization function set the pointer? You then don't have to make these two tests every time you check for an interrupt/enter to process interrupts. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
