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| author | Simon Glass <sjg@chromium.org> | 2021-02-11 14:38:59 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-02-13 00:29:22 +0000 |
| commit | ab1d9102b8a7f57f63e4ed21a08113f4e4cba6be (patch) | |
| tree | 54290c2d0ba3cd7176b92e65bd99e0cc6e71562d /zephyr/linker | |
| parent | c56806bb8d262f003b92134fdc8987ac51f6824e (diff) | |
| download | chrome-ec-ab1d9102b8a7f57f63e4ed21a08113f4e4cba6be.tar.gz | |
zephyr: Add support for CONFIG_MPU
Add this option so that the Memory-Protection Unit (MPU) can be enabled.
The implementation is still to be worked out.
Note that CONFIG_PLATFORM_EC_EXTERNAL_STORAGE is not defined, as it
should be. That work is ongoing elsewhere.
BUG=b:180039888
BRANCH=none
TEST=build zephyr volteer
Build ECOS for volteer
Signed-off-by: Simon Glass <sjg@chromium.org>
Change-Id: Ie26e8ba4b3f0b8024930e42fbbb03f0f2a26f3da
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2691566
Reviewed-by: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'zephyr/linker')
| -rw-r--r-- | zephyr/linker/CMakeLists.txt | 3 | ||||
| -rw-r--r-- | zephyr/linker/iram_text.ld | 23 |
2 files changed, 26 insertions, 0 deletions
diff --git a/zephyr/linker/CMakeLists.txt b/zephyr/linker/CMakeLists.txt index 4d8b26f631..3aa22c98e2 100644 --- a/zephyr/linker/CMakeLists.txt +++ b/zephyr/linker/CMakeLists.txt @@ -4,3 +4,6 @@ # Add the fixed sections to the output image. zephyr_linker_sources(ROM_START SORT_KEY 1 fixed-sections.ld) + +# Support protection of part of the internal RAM +zephyr_linker_sources(RWDATA SORT_KEY 1 iram_text.ld) diff --git a/zephyr/linker/iram_text.ld b/zephyr/linker/iram_text.ld new file mode 100644 index 0000000000..3ea3f4db7e --- /dev/null +++ b/zephyr/linker/iram_text.ld @@ -0,0 +1,23 @@ +/* Copyright 2021 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef CONFIG_ARCH_POSIX + +/* This code taken from core/cortex-m/ec.lds.S */ + +#if defined(CONFIG_PLATFORM_EC_MPU) +/* MPU regions must be aligned to a 32-byte boundary */ +#define _IRAM_ALIGN 32 +#else +#define _IRAM_ALIGN 4 +#endif + + . = ALIGN(_IRAM_ALIGN); + __iram_text_start = .; + *(.iram.text) + . = ALIGN(_IRAM_ALIGN); + __iram_text_end = .; + +#endif /* CONFIG_ARCH_POSIX */ |