Hi, On Sun, Nov 13, 2011 at 9:37 PM, Ohad Ben-Cohen <ohad@xxxxxxxxxx> wrote: > Hello, > > On Sun, Nov 13, 2011 at 1:04 PM, Ming Lei <tom.leiming@xxxxxxxxx> wrote: >> Just be curious, is it a generic IOMMU so that it can be used by all IO >> peripherals in OMAP4? > > No, it's a dedicated iommu for the DSP and dual-M3 subsystems. Thanks for your clarification. >> From related source code[1] and OMAP4 TRM[2], looks like the omap iommu >> only belongs to Cortex-M3 MPU subsystem inside OMAP4 chip, so I am wondering >> why introduces the driver for arm v7 based linux kernel... > > Because we control the iommus from the A9 (which is running Linux..) :) Could you give a use case about the usage of controlling the iommu from the A9? Or the advantage of doing this? I understand that the M3 and DSP can do this too, :-) thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
