WIP All changes squashed

An early squashed commit for all the changes made to tock that contains
CHERI changes and more.

This needs to be reworked into individual features and properly
config-ed / feature-gated, or relagated to downstream applicable only.

Changes here:

* Generic CHERI support
* Generic RV64 support
* A CHERI virt QEMU board
* Changes to grant access interface for zero-copy/dma
  (ARef/PRef/safe_buf/resettable_iterator etc)
* Some example zero copy capsules/drivers (a uart)
* Static init pattern (StaticComponant and helpers)
* A dynamic process loading capsule
* Non execute in place ("contiguous loading")

Change-Id: Ia68e0846ec856f0789ba38cb9fa77f56d55647c3

Cargo.toml

@@ -8,6 +8,7 @@ members = [
     "arch/cortex-m7",
     "arch/riscv",
     "arch/rv32i",
+    "arch/cheri",
     "boards/acd52832",
     "boards/nano_rp2040_connect",
     "boards/arty_e21",
@@ -37,6 +38,7 @@ members = [
     "boards/teensy40",
     "boards/nano33ble",
     "boards/qemu_rv32_virt",
+    "boards/qemu_cheri_virt",
     "boards/swervolf",
     "boards/weact_f401ccu6/",
     "capsules",
@@ -68,12 +70,14 @@ members = [
     "chips/stm32f4xx",
     "chips/swerv",
     "chips/swervolf-eh1",
+    "chips/uarts",
     "kernel",
     "libraries/enum_primitive",
     "libraries/riscv-csr",
     "libraries/tock-cells",
     "libraries/tock-register-interface",
     "libraries/tickv",
+    "libraries/misc",
 ]
 exclude = [
     "tools/alert_codes",

arch/cheri/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "cheri"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+kernel = { path = "../../kernel" }