5 menu "IOMMU device drivers"
8 bool "Enable Driver Model for IOMMU drivers"
11 Enable driver model for IOMMU devices. An IOMMU maps device
12 virtiual memory addresses to physical addresses. Devices
13 that sit behind an IOMMU can typically only access physical
14 memory if the IOMMU has been programmed to allow access to
18 bool "Apple DART support"
19 depends on IOMMU && ARCH_APPLE
22 Enable support for the DART on Apple SoCs. The DART is Apple's
23 IOMMU implementation. The driver performs the necessary
24 configuration to put the DART into bypass mode such that it can
25 be used transparently by U-Boot.
28 bool "Qualcomm quirky SMMU support"
29 depends on IOMMU && ARCH_SNAPDRAGON
31 Enable support for the Qualcomm variant of the Arm System MMU-500.
32 Qualcomm boards have a non-standard SMMU where some registers are
33 emulated by the hypervisor. It is initialised early in the boot
34 process and can't be turned off.
36 The main caveat with this hardware is that it doesn't support BYPASS
37 streams, attempting to configure once will instead wind up with a
38 FAULT stream, and the device will crash when DMA is attempted.
40 Say Y here to enable support for non-boot peripherals like USB by
41 configuring identity mapped streams for them.