Resource table IOMMU mapping request entry. More...

#include <remoteproc.h>

Data Fields
uint32_t	type
	IOMMU mapping request has type 1. More...

uint32_t	da
	Device address. More...

uint32_t	pa
	Physical address to map. More...

uint32_t	len
	Length of the mapping in bytes. More...

uint32_t	flags
	IOMMU protection flags. More...

uint32_t	reserved
	Reserved (must be zero) More...

uint8_t	name [RPROC_MAX_NAME_LEN]
	Optional human-readable name of the requested memory region used for debugging. More...

Detailed Description

Resource table IOMMU mapping request entry.

This resource entry requests the host to IOMMU map a physically contiguous memory region. This is needed in case the remote remoteproc requires access to certain memory-based peripherals; never use it to access regular memory.

This is obviously only needed if the remote remoteproc is accessing memory via an IOMMU.

Note: at this point we just "trust" those devmem entries to contain valid physical addresses, but this isn't safe and will be changed: eventually we want remoteproc implementations to provide us ranges of physical addresses the firmware is allowed to request, and not allow firmwares to request access to physical addresses that are outside those ranges.

Field Documentation

◆ da

uint32_t fw_rsc_devmem::da

Device address.

◆ flags

uint32_t fw_rsc_devmem::flags

IOMMU protection flags.

◆ len

uint32_t fw_rsc_devmem::len

Length of the mapping in bytes.

◆ name

uint8_t fw_rsc_devmem::name[RPROC_MAX_NAME_LEN]

Optional human-readable name of the requested memory region used for debugging.

◆ pa

uint32_t fw_rsc_devmem::pa

Physical address to map.

◆ reserved

uint32_t fw_rsc_devmem::reserved

Reserved (must be zero)

◆ type

uint32_t fw_rsc_devmem::type

IOMMU mapping request has type 1.

The documentation for this struct was generated from the following file:

lib/include/openamp/remoteproc.h

Data Fields