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cortex_m: Avoid unnecessary saving and restoring of DCRDR 48/1848/3
authorAndreas Fritiofson <andreas.fritiofson@gmail.com>
Sun, 29 Dec 2013 20:59:36 +0000 (21:59 +0100)
committerSpencer Oliver <spen@spen-soft.co.uk>
Sat, 11 Jan 2014 22:22:25 +0000 (22:22 +0000)
commit178b5d072e2bd2038fc9065b9722da296e6f5e16
treed84a7224d552538fc65254b088093badb8712c52tree | snapshot
parentbd0fbef5c8819c9f58b48f02acd862d9be4d87b9commit | diff
cortex_m: Avoid unnecessary saving and restoring of DCRDR

This is used for the emulated DCC channel which is only maintained as long
as target->dbg_msg_enabled is set. Skip the saving and restoring if not
enabled to save one dap_run() per core register access.

Note that we could've probably queued all core register accesses in the
same transaction if the armv7 register framework hadn't required
synchronous register accesses.

Change-Id: I4fe6d713261ee5db42422203eb63035fdcc48891
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1848
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
src/target/cortex_m.c diff | blob | history
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