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| -rw-r--r-- | doc/openocd.texi | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi index 9eabf414..47e5cc24 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -2082,13 +2082,23 @@ command, and in other places the target needs to be identified. @section Target Config/Cget Options These options can be specified when the target is created, or later via the configure option or to query the target via cget. + +You should specify a working area if you can; typically it uses some +on-chip SRAM. Such a working area can speed up many things, including bulk +writes to target memory; flash operations like checking to see if memory needs +to be erased; GDB memory checksumming; and may help perform otherwise +unavailable operations (like some coprocessor operations on ARM7/9 systems). @itemize @bullet @item @b{-type} - returns the target type @item @b{-event NAME BODY} see Target events -@item @b{-work-area-virt [ADDRESS]} specify/set the work area -@item @b{-work-area-phys [ADDRESS]} specify/set the work area +@item @b{-work-area-virt [ADDRESS]} specify/set the work area base address +which will be used when an MMU is active. +@item @b{-work-area-phys [ADDRESS]} specify/set the work area base address +which will be used when an MMU is inactive. @item @b{-work-area-size [ADDRESS]} specify/set the work area -@item @b{-work-area-backup [0|1]} does the work area get backed up +@item @b{-work-area-backup [0|1]} does the work area get backed up; +by default, it doesn't. When possible, use a working_area that doesn't +need to be backed up, since performing a backup slows down operations. @item @b{-endian [big|little]} @item @b{-variant [NAME]} some chips have variants OpenOCD needs to know about @item @b{-chain-position DOTTED.NAME} the tap name this target refers to. @@ -2144,15 +2154,6 @@ still use this that need to be converted. @end example @* The target# is a the 0 based target numerical index. -This command specifies a working area for the debugger to use. This -may be used to speed-up downloads to target memory and flash -operations, or to perform otherwise unavailable operations (some -coprocessor operations on ARM7/9 systems, for example). The last -parameter decides whether the memory should be preserved -(<@var{backup}>) or can simply be overwritten (<@var{nobackup}>). If -possible, use a working_area that doesn't need to be backed up, as -performing a backup slows down operation. - @node Flash Configuration @chapter Flash programming @cindex Flash Configuration @@ -2810,7 +2811,7 @@ speeds, like the 32kHz startup clock of an AT91RM9200. @*Enable the use of the debug communications channel (DCC) to write larger (>128 byte) amounts of memory. DCC downloads offer a huge speed increase, but might be potentially unsafe, especially with targets running at very low speeds. This command was introduced -with OpenOCD rev. 60. +with OpenOCD rev. 60, and requires a few bytes of working area. @end itemize @subsection ARM720T specific commands |