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(parent: b08306a) | patch
mips: use cp0 DeSave to cache $15 / t7 65/1565/4
authorSalvador Arroyo <sarroyofdez@yahoo.es>
Sun, 25 Aug 2013 10:21:18 +0000 (12:21 +0200)
committerFreddie Chopin <freddie.chopin@gmail.com>
Fri, 9 May 2014 20:38:46 +0000 (20:38 +0000)
commitd7127bfa9774c6d9782b20897737e3c45aaedb68
tree83a490a3842294294f18be03f836a9d0fc6a2027tree | snapshot
parentb08306a1725f7dcd70b9d2f7500be02d08b4cfb1commit | diff
mips: use cp0 DeSave to cache $15 / t7

Near all pracc functions store $15 in DeSave and
restore it when exiting.
There is no need to save it, if mips32_pracc_read_regs()
save this register in Desave when entering debug mode.
mips32_pracc_write_regs() needs to update it when
exiting debug mode.
Other pracc functions must not modify DeSave.
The jump code in the fastdata transfer function needs also
some little modifications.
Remark:
Like in current code the user can read/modify $15
with the cp0 31 commands.

Change-Id: I5b7dfc1b6169da846f5d2dd3ad4209a9da2c3fad
Signed-off-by: Salvador Arroyo <sarroyofdez@yahoo.es>
Reviewed-on: http://openocd.zylin.com/1565
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
src/target/mips32_pracc.c diff | blob | history
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