commit feaf322edd8a0f7f6a032cbb6b7537005fd613d7
author Timothy Chen <timothytim@google.com> Tue Nov 02 13:49:43 2021 -0700
committer tjaychen <timothytim@google.com> Tue Nov 09 15:56:15 2021 -0800
tree 91285ed6a9b2bf86ad04f9a74bdc2dbeb21df10f
parent 261a12b15f8ec711aa4e14512787b11e3c08531e

[flash_ctrl] Add plain text integrity in flash

- Fixes https://github.com/lowRISC/opentitan/issues/8984
- Takes the spare storage bits of flash and store a de-scrambled
  integrity. This allows flash to emulate the behavior of end-to-end
  storage despite its need for ECC reliability checks.

Signed-off-by: Timothy Chen <timothytim@google.com>

[sw, util] Add support for flash image generation

- only supports the plain text ECC at the moment
- scrambled will be added in the future

Signed-off-by: Timothy Chen <timothytim@google.com>

[test] update verilator CI test pathing

flash now uses vmem instead of elf

Signed-off-by: Timothy Chen <timothytim@google.com>

[flash_ctrl] python updates per comments

Signed-off-by: Timothy Chen <timothytim@google.com>

[flash_ctrl] fix typo

Signed-off-by: Timothy Chen <timothytim@google.com>

sw/device/examples/hello_usbdev/meson.build

diff --git a/sw/device/examples/hello_usbdev/meson.build b/sw/device/examples/hello_usbdev/meson.build
index 1e673bb..750ed4f 100644
--- a/sw/device/examples/hello_usbdev/meson.build
+++ b/sw/device/examples/hello_usbdev/meson.build
@@ -53,6 +53,15 @@
     kwargs: bin_to_vmem64_custom_target_args,
   )
 
+  hello_usbdev_scr_vmem64 = custom_target(
+    target_name.format('scrambled'),
+    input: hello_usbdev_vmem64,
+    output: flash_image_outputs,
+    command: flash_image_command,
+    depend_files: flash_image_depend_files,
+    build_by_default: true,
+  )
+
   custom_target(
     target_name.format('export'),
     command: export_target_command,
@@ -63,6 +72,7 @@
       hello_usbdev_bin,
       hello_usbdev_vmem32,
       hello_usbdev_vmem64,
+      hello_usbdev_scr_vmem64,
     ],
     output: target_name.format('export'),
     build_always_stale: true,

sw/device/examples/hello_world/meson.build

diff --git a/sw/device/examples/hello_world/meson.build b/sw/device/examples/hello_world/meson.build
index a644745..903a581 100644
--- a/sw/device/examples/hello_world/meson.build
+++ b/sw/device/examples/hello_world/meson.build
@@ -50,6 +50,15 @@
     kwargs: bin_to_vmem64_custom_target_args,
   )
 
+  hello_world_scr_vmem64 = custom_target(
+    target_name.format('scrambled'),
+    input: hello_world_vmem64,
+    output: flash_image_outputs,
+    command: flash_image_command,
+    depend_files: flash_image_depend_files,
+    build_by_default: true,
+  )
+
   custom_target(
     target_name.format('export'),
     command: export_target_command,
@@ -60,6 +69,7 @@
       hello_world_bin,
       hello_world_vmem32,
       hello_world_vmem64,
+      hello_world_scr_vmem64,
     ],
     output: target_name.format('export'),
     build_always_stale: true,