tree 564d0024c7f71d6c643272a48499472525d3b984
parent 92f91f64bc722ce8cced0f27e6d486f915cf0011
author Andrew Jones <andrew.jones@linux.dev> 1723186790 +0200
committer Andrew Jones <andrew.jones@linux.dev> 1723473157 +0200

riscv: Track memory above 3G

We chop the main memory region (which gets identity mapped) off at
the 3G boundary because the virtual memory allocator claims the 3G-4G
address range. Unit tests may want to be able to access the higher
memory, though, so keep track of it by putting it in its own memory
region. Since the test framework isn't using that memory region, flag
it as unused so unit tests will be confident that they can use the
memory for whatever they like.

Signed-off-by: Andrew Jones <andrew.jones@linux.dev>