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| author | Nicolas Boichat <drinkcat@chromium.org> | 2018-04-09 15:18:44 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-04-10 19:13:28 -0700 |
| commit | 3a9b89116fd0b3e358706f9c5822d4ee944978b6 (patch) | |
| tree | a66427ffa0ded073d1451b79e48e8fda37c3da8a | |
| parent | 995f23b86698a120d8183cc6aba1d676ded1f0b0 (diff) | |
| download | chrome-ec-3a9b89116fd0b3e358706f9c5822d4ee944978b6.tar.gz | |
nautilus: Shrink accelerometer FIFO to 512 entries
It appears that the shared memory buffer on Nautilus starts at
200c7720 D __shared_mem_buf
That's 29.78 kb into the RAM. Software sync needs 1kb, so we should
be fine, expect that the last 2kb of RAM are supposed to be reserved
for the "booter" (NPCX_BTRAM_SIZE).
We shrink the accelerometer FIFO to 512 entries, freeing up 4kb of
RAM, and increase the UART TX buffer to 4kb, to make use of 3kb of
that freed up space:
200c7320 D __shared_mem_buf
That's 28.78 kb into the RAM.
BRANCH=poppy
BUG=chromium:739771
TEST=make BOARD=nautilus -j, check that shared_mem_buf offset is
< 29 kb.
Change-Id: I361a439b847d31d3415f2ee66229bd32f8816e2d
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1002712
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@google.com>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
| -rw-r--r-- | board/nautilus/board.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/board/nautilus/board.h b/board/nautilus/board.h index dace2d8480..d516cde646 100644 --- a/board/nautilus/board.h +++ b/board/nautilus/board.h @@ -126,11 +126,14 @@ #define CONFIG_LID_ANGLE_INVALID_CHECK /* FIFO size is in power of 2. */ -#define CONFIG_ACCEL_FIFO 1024 +#define CONFIG_ACCEL_FIFO 512 /* Depends on how fast the AP boots and typical ODRs */ #define CONFIG_ACCEL_FIFO_THRES (CONFIG_ACCEL_FIFO / 3) +#undef CONFIG_UART_TX_BUF_SIZE +#define CONFIG_UART_TX_BUF_SIZE 4096 + #define CONFIG_TABLET_MODE #define CONFIG_TABLET_MODE_SWITCH |