- Add config "ARCH_USE_S_MODE" which controls whether the kernel
runs in M-mode or S-mode
- Add more MSTATUS and most of the SSTATUS register definitions
- Add more MIP flags for interrupt delegation
- Add handling of interrupts from S-mode
- Add handling of FPU from S-mode
- Add new context handling functions that are not dependent on the trap
handlers / ecall
NOTE: S-mode requires a companion SW (SBI) which is not yet implemented,
thus S-mode is not usable as is, yet.
This adds a simple USB device driver for the mpfs. However,
this driver is still at its early phase. Only limited testing
with CDC/ACM has been conducted.
Signed-off-by: Eero Nurkkala <eero.nurkkala@offcode.fi>
The image must be placed into:
boards/risc-v/mpfs/icicle/include/boot_romfsimg.h
The image is mounted by mpfs_bringup, which is run by the application
itself, or by board_late_initialize() in the case when
CONFIG_BOARD_LATE_INITIALIZE is defined, e.g. with CONFIG_BUILD_KERNEL
The old implementation used the default ld.script for the kernel side
which did not obey the memory.ld limits whatsoever.
Also, provide the user space addresses from the linker script to get rid
of the pre-processor macros that define (incorrect) default values for
the user space composition.
- Add defconfig and board specific files
- Create mpfs/common for code which is shared between MPFS boards.
- Add support for GPIO driven EMMCSD mux.
- Move DDR Libero definitions from arch to boards.
Signed-off-by: Jani Paalijarvi <jani.paalijarvi@unikie.com>
