This is the mail archive of the ecos-discuss@sourceware.org mailing list for the eCos project.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
Hello folks, Many of the flash_XXX() functions in .../packages/io/flash/current/src/flash.c have the caches disabled while accessing the flash. According to flash.h - and I quote - "Execution of flash code must be done inside a HAL_FLASH_CACHES_OFF/HAL_FLASH_CACHES_ON region - disabling the cache on unified cache systems is necessary to prevent burst access to the flash area being programmed. With Harvard style caches, only the data cache needs to be disabled, but the instruction cache is disabled for consistency". In our case we have a Harvard style cache running on an ARM9. The address space covered by the flash is uncached and unbuffered (We're running ROMRAM), so my question is: Is disabling of the DCache really needed on such a system? Thx in advance. Lars Povlsen -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |