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| author | Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> | 2014-12-03 16:47:03 +0100 |
|---|---|---|
| committer | Markos Chandras <markos.chandras@imgtec.com> | 2015-02-17 16:37:37 +0100 |
| commit | b0a668fb2038d846a466c7a16a358d874002b697 (patch) | |
| tree | 78e1a41109308a34e08dd552ddf6834f085d288c /Documentation/percpu-rw-semaphore.txt | |
| parent | MIPS: asm: mipsregs: Add support for the LLADDR register (diff) | |
| download | linux-b0a668fb2038d846a466c7a16a358d874002b697.tar.xz linux-b0a668fb2038d846a466c7a16a358d874002b697.zip | |
MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6
MIPS R6 removed quite a few R2 instructions. However, there
is plenty of <R6 userland code so we add an in-kernel emulator
so we can still be able to execute all R2 userland out there.
The emulator comes with a handy debugfs under /mips/ directory
(r2-emul-stats) to provide some basic statistics of the
instructions that are being emulated.
Below are some statistics from booting a minimal buildroot image:
Instruction Total BDslot
------------------------------
movs 236969 0
hilo 56686 0
muls 55279 0
divs 10941 0
dsps 0 0
bops 1 0
traps 0 0
fpus 0 0
loads 214981 17
stores 103364 0
llsc 56898 0
dsemul 150418 0
jr 370158
bltzl 43
bgezl 1594
bltzll 0
bgezll 0
bltzal 39
bgezal 39
beql 14503
bnel 138741
blezl 0
bgtzl 3988
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Diffstat (limited to 'Documentation/percpu-rw-semaphore.txt')
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