dt-bindings: riscv: Add fine-grained IO memory PMP attributes
Introduce new macros to define bitfields for RISC-V Physical Memory
Protection (PMP) attributes, specifically for specifying Read, Write,
and Execute permissions for IO memory regions in device tree bindings.
The following macros are added:
- ATTR_RISCV_TYPE_IO_R: Read access
- ATTR_RISCV_TYPE_IO_W: Write access
- ATTR_RISCV_TYPE_IO_X: Execute access
Corresponding macros for device tree usage are also added:
- DT_MEM_RISCV_TYPE_IO_R
- DT_MEM_RISCV_TYPE_IO_W
- DT_MEM_RISCV_TYPE_IO_X
These macros allow device tree source files to precisely describe the
intended access permissions for memory-mapped IO regions, enhancing
the system's memory protection configuration.
Signed-off-by: Firas Sammoura <fsammoura@google.com>
1 file changed
