| # Copyright (c) 2020 Intel Corporation |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| choice BACKING_STORE_CHOICE |
| prompt "Backing store algorithms" |
| default BACKING_STORE_CUSTOM |
| |
| config BACKING_STORE_CUSTOM |
| bool "Custom backing store implementation" |
| help |
| This option is chosen when the backing store will be implemented in |
| the application. This will be typical as these tend to be very |
| hardware-dependent. |
| |
| config BACKING_STORE_RAM |
| bool "RAM-based test backing store" |
| help |
| This implements a backing store using physical RAM pages that the |
| Zephyr kernel is otherwise unaware of. It is intended for |
| demonstration and testing of the demand paging feature. |
| |
| config BACKING_STORE_QEMU_X86_TINY_FLASH |
| bool "Flash-based backing store on qemu_x86_tiny" |
| depends on BOARD_QEMU_X86_TINY |
| help |
| This uses the "flash" memory area (in DTS) as the backing store |
| for demand paging. The qemu_x86_tiny.ld linker script puts |
| the symbols outside of boot and pinned sections into the flash |
| area, allowing testing of the demand paging mechanism on |
| code and data. |
| endchoice |
| |
| if BACKING_STORE_RAM |
| config BACKING_STORE_RAM_PAGES |
| int "Number of pages for RAM backing store" |
| default 16 |
| help |
| Number of pages of backing store memory to reserve in RAM. All test |
| cases for demand paging assume that there are at least 16 pages of |
| backing store storage available. |
| |
| endif # BACKING_STORE_RAM |
