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risc-v/canmv230: add PROTECTED build support

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Additions:

- In arch/risc-v/src/k230/
  - k230_userspace.c      add user space initialization
  - k230_userspace.h      headers for user space initialization
- In boards/risc-v/k230/canmv230/kernel/
  - k230_userspace.c      userspace_s const data definition
  - Makefile              pass1 Makefile
- In boards/risc-v/k230/canmv230/scripts/
  - ld-protected.script   linker script for protected build kernel
  - ld-userland.script    linker script for protected build userspace
- In boards/risc-v/k230/canmv230/configs
  - pnsh/defconfig        defconfig for protected build

Changes:

- In arch/risc-v/src/k230/
  - k230_start.c          add protected build handling logic
  - Make.defs             add protected build support
- In boards/risc-v/k230/canmv230/scripts/
  - Make.defs             add protected build support
- In Documentation/platforms/risc-v/k230/boards/canmv230/
  - index.rst             add protected build usage

Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
This commit is contained in:
Yanfeng Liu
2024-01-08 14:33:53 +08:00
committed by Alan Carvalho de Assis
parent 514f020ace
commit dd1365ef85
11 changed files with 761 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/platforms/risc-v/k230/boards/canmv230/index.rst
+32 -5
View File
@@ -36,7 +36,10 @@ Building
To build NuttX for CanMV, :doc:`install the prerequisites </quickstart/install>` and :doc:`clone the git repositories </quickstart/install>` for ``nuttx`` and ``apps``.
Configure and build FLAT mode NuttX:
FLAT Build
----------
FLAT build is straightforward:
.. code:: console
@@ -44,9 +47,33 @@ Configure and build FLAT mode NuttX:
$ make distclean && tools/configure.sh canmv230:nsh
$ make -j4
This should have `nuttx.bin` generated, it can be loaded by U-Boot on the board.
The generated `nuttx.bin` can then be tried on the target.
The NuttX KERNEL build requires two build passes: first pass to build kernel w/ dummy ROMFS and apps, second pass to build the kernel with real ROMFS image containing apps built in first pass.
PROTECTED Build
---------------
PROTECTED build can be done like below:
.. code:: console
$ cd nuttx
$ make distclean && tools/configure.sh canmv230:pnsh
$ make -j4
There will be `nuttx.bin` and `nuttx_user.bin` generated. We need pad `nuttx.bin` to so that to fill memory gap till user space flash start then combine it with `nuttx_user.bin` to form the final binary for run on the target. Say the gap between uflash and kflash is 256KB in `scripts/ld-protected.script`, we can pad-combine them like below:
.. code:: console
$ dd if=/dev/zero of=/tmp/padded bs=1024 count=256
$ dd if=nuttx.bin of=/tmp/padded conv=notrunc
$ cat /tmp/padded nuttx_user.bin > /tftp-folder/nuttx.bin
The combined `nuttx.bin` in TFTP service folder can then be tried on target.
KERNEL Build
------------
KERNEL build requires two build passes: first pass to build kernel w/ dummy ROMFS, then we build the apps and update ROMFS, second pass to build the kernel with real ROMFS image containing the apps.
.. code:: console
@@ -72,7 +99,8 @@ The built `nuttx.bin` can be then wrapped with K230 OpenSBI like below:
Please use actual paths on your host for `nuttx.bin` and TFTP folder when running above commands.
Booting
Running
=======
Within U-boot console, load `nuttx.bin` from TFTP service and run it:
@@ -90,4 +118,3 @@ Issues
======
- The `ostest` app has non-zero exit code in Kernel build.