diff options
| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-10-25 02:24:40 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-10-25 02:24:40 +0000 |
| commit | efc8d580b339a7c741e8f134c9fbb8a834ee3179 (patch) | |
| tree | 4e68d0859d8a8ee180e7819e7f8cb35e9dfac4f3 /nuttx/ChangeLog | |
| parent | 5e5bc7a64b05d06510c8989165759368ad6cc8fc (diff) | |
| download | nuttx-efc8d580b339a7c741e8f134c9fbb8a834ee3179.tar.gz nuttx-efc8d580b339a7c741e8f134c9fbb8a834ee3179.tar.bz2 nuttx-efc8d580b339a7c741e8f134c9fbb8a834ee3179.zip | |
Improved certain Cortex-M3 context switch times
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2177 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/ChangeLog')
| -rw-r--r-- | nuttx/ChangeLog | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/nuttx/ChangeLog b/nuttx/ChangeLog index af5ab7502..03c32cfba 100644 --- a/nuttx/ChangeLog +++ b/nuttx/ChangeLog @@ -918,7 +918,12 @@ * include/nuttx/mtd.h. Added a simple interface definition to support some FLASH, EEPROM, NVRAM, etc. devices. * driver/mtd/m25px.c. Added a driver for SPI based FLASH parts M25P64 and M25P128. - * confgs/stm3210e-eval/usbserial. Add a USB serial configuration for the STM32. + * configs/stm3210e-eval/usbserial. Add a USB serial configuration for the STM32. This is for test and development; the STM32 has not yet been checked in. + * arch/arm/src/cortexm3/up_switchcontext.S & up_svccall.c. Made an improvement + to context switching. There are two types of context switches: interrupt + context switches and background/user context switches. This change should + improve the performance of those background/user context switches by a factor + of about two. |