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| author | Nicolas Boichat <drinkcat@chromium.org> | 2019-01-23 15:13:01 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-02-18 08:51:20 -0800 |
| commit | 0528c46598c8c89f04b7129722de50e178b62aa2 (patch) | |
| tree | 9afe729c302f433174b1f8bcecfeaf206d5cb554 /common | |
| parent | 80020d90d17ac1507abcefe9004ed6ae8cb9728d (diff) | |
| download | chrome-ec-0528c46598c8c89f04b7129722de50e178b62aa2.tar.gz | |
core: Allow .bss and .data sections in DRAM
We manually copy other .data from the original section on boot, and
clear DRAM .bss.
This way, a single object file (or archive) can be moved fully to
DRAM.
BRANCH=none
BUG=b:122058243
TEST=With next CL, dram_test works
Change-Id: I1a434bbd8a4135d16b3f49b0d1b75b96506e3e24
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1445652
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/main.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/common/main.c b/common/main.c index 6adea9b049..0a222b23ca 100644 --- a/common/main.c +++ b/common/main.c @@ -17,8 +17,9 @@ #include "flash.h" #include "gpio.h" #include "hooks.h" -#include "lpc.h" #include "keyboard_scan.h" +#include "link_defs.h" +#include "lpc.h" #ifdef CONFIG_MPU #include "mpu.h" #endif @@ -84,6 +85,14 @@ test_mockable __keep int main(void) system_pre_init(); system_common_pre_init(); +#ifdef CONFIG_DRAM_BASE + /* Now that DRAM is initialized, clear up DRAM .bss, copy .data over. */ + memset(&__dram_bss_start, 0, + (uintptr_t)(&__dram_bss_end) - (uintptr_t)(&__dram_bss_start)); + memcpy(&__dram_data_start, &__dram_data_lma_start, + (uintptr_t)(&__dram_data_end) - (uintptr_t)(&__dram_data_start)); +#endif + #if defined(CONFIG_FLASH_PHYSICAL) /* * Initialize flash and apply write protect if necessary. Requires |