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| author | Mulin Chao <mlchao@nuvoton.com> | 2016-09-07 10:49:50 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-09-15 16:16:22 -0700 |
| commit | a4c2b141f80777bf089f35dabe8e355a0e639a92 (patch) | |
| tree | d028dbd2df3ec2a66673c82bfc25862d5c35da58 /core | |
| parent | f48b781dea0593f153715fc3c08a8dcf50236360 (diff) | |
| download | chrome-ec-a4c2b141f80777bf089f35dabe8e355a0e639a92.tar.gz | |
npcx: Fixed bug that api utility in ROM doesn't enable burst mode.
We found the api utility in ROM doesn't enable burst mode of GDMA. It
influences the performance of FW download a lot. The CL modified GDMA
for moving the code of the other region from flash to ram. And move a
function that kicks off GMDA transactions to suspend ram in case this
utility is erased by itself. This issue will be fixed in our next
generation.
Modified sources:
1. system.c: Implement GDMA bypass.
2. system_chip.h: Import flash addresses for GDMA bypass code.
3. registers.h: Add GDMA register definitions.
4. cortex-m/ec.lds.S: Add lowpower_ram2 section in linker script.
BRANCH=none
BUG=chrome-os-partner:56794
TEST=make BOARD=npcx_evb; test sysjump and measure download time
Change-Id: I8490f8f2e5a8cdcb6fd10511878c4a4af8073bbf
Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/381779
Commit-Ready: Shawn N <shawnn@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'core')
| -rw-r--r-- | core/cortex-m/ec.lds.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/core/cortex-m/ec.lds.S b/core/cortex-m/ec.lds.S index 97458f8a13..2b70535fa6 100644 --- a/core/cortex-m/ec.lds.S +++ b/core/cortex-m/ec.lds.S @@ -93,8 +93,13 @@ SECTIONS __flash_lpfw_start = .; /* Entering deep idle FW for better power consumption */ KEEP(*(.lowpower_ram)) - . = ALIGN(4); + . = ALIGN(4); __flash_lpfw_end = .; + __flash_lplfw_start = .; + /* GDMA utilities for better FW download speed */ + KEEP(*(.lowpower_ram2)) + . = ALIGN(4); + __flash_lplfw_end = .; } > CDRAM AT > FLASH #else } > FLASH |