On 12/05/2012 03:01 AM, Joseph Lo wrote: > The "powered-down" CPU idle mode of Tegra cut off the vdd_cpu rail, it > include the power of GIC. That caused the SGI (Software Generated > Interrupt) been lost. Because the SGI can't wake up the CPU that in > the "powered-down" CPU idle mode. We need to check if there is any > pending SGI when go into "powered-down" CPU idle mode. This is important > especially when applying the coupled cpuidle framework into "power-down" > cpuidle dirver. Because the coupled cpuidle framework may have the > chance that misses IPI_SINGLE_FUNC handling sometimes. > > For the PPI or SPI, something like the legacy peripheral interrupt. It > still can be maintained by Tegra legacy interrupt controller. If there > is any pending PPI or SPI when CPU in "powered-down" CPU idle mode. The > CPU can be woken up immediately. So we don't need to take care the same > situation for PPI or SPI. Is this feature something that can/should be added to the core GIC driver, rather than something custom in the Tegra code? Part of the reason I ask is that I'd like to avoid any more: static void __iomem *distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE); since that requires static page tables to be set up, whereas I'd like to reduce, as much as possible, the set of pages Tegra maps statically. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
