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| author | Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> | 2014-12-03 18:47:03 +0300 |
|---|---|---|
| committer | Markos Chandras <markos.chandras@imgtec.com> | 2015-02-17 18:37:37 +0300 |
| commit | b0a668fb2038d846a466c7a16a358d874002b697 (patch) | |
| tree | 78e1a41109308a34e08dd552ddf6834f085d288c /arch/mips/math-emu | |
| parent | b55b9e271544a23ca23b7ca3a87baf6329fcb341 (diff) | |
| download | linux-b0a668fb2038d846a466c7a16a358d874002b697.tar.xz | |
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 'arch/mips/math-emu')
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index 6e7920b20822..3c341b08d120 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -48,6 +48,7 @@ #include <asm/processor.h> #include <asm/fpu_emulator.h> #include <asm/fpu.h> +#include <asm/mips-r2-to-r6-emul.h> #include "ieee754.h" @@ -68,7 +69,7 @@ static int fpux_emu(struct pt_regs *, #define modeindex(v) ((v) & FPU_CSR_RM) /* convert condition code register number to csr bit */ -static const unsigned int fpucondbit[8] = { +const unsigned int fpucondbit[8] = { FPU_CSR_COND0, FPU_CSR_COND1, FPU_CSR_COND2, |