riscv: rv_core: fix JALR behavior

use MIT License

mmio_dev: add virtual deconstruct function

memory: use char* for every memory buffer pointer

clean sv39

add zicsr and zifencei to riscv64-linux docs, fix #7

Merge pull request #6 from Coekjan/yzr--2023-halt-when-core-end

halt when `core.is_end()`

add aclint support

allow raw addr in xbar

fix ebase init

add nr_tlb_entry to mips_core

mips: fix swl and swr raise tlbl exception

allow erl for u-boot

clear bcast addr