diff options
| author | Artyom Tarasenko <atar4qemu@gmail.com> | 2025-02-09 22:12:48 +0100 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2025-02-18 08:29:03 -0800 |
| commit | 172e7644f336dd82cb8d56cfb964477731f34f43 (patch) | |
| tree | 30e2213efd576217eec1d05e0e34ecc71f0935cf | |
| parent | 7a74e468089a58756b438d31a2a9a97f183780d7 (diff) | |
| download | qemu-172e7644f336dd82cb8d56cfb964477731f34f43.zip qemu-172e7644f336dd82cb8d56cfb964477731f34f43.tar.gz qemu-172e7644f336dd82cb8d56cfb964477731f34f43.tar.bz2 | |
target/sparc: fake UltraSPARC T1 PCR and PIC registers
Fake access to
PCR Performance Control Register
and
PIC Performance Instrumentation Counter.
Ignore writes in privileged mode, and return 0 on reads.
This allows booting Tribblix, MilaX and v9os under Niagara target.
Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250209211248.50383-1-atar4qemu@gmail.com>
| -rw-r--r-- | target/sparc/insns.decode | 7 | ||||
| -rw-r--r-- | target/sparc/translate.c | 19 |
2 files changed, 25 insertions, 1 deletions
diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode index cfcdf66..9e39d23 100644 --- a/target/sparc/insns.decode +++ b/target/sparc/insns.decode @@ -96,7 +96,10 @@ CALL 01 i:s30 RDTICK 10 rd:5 101000 00100 0 0000000000000 RDPC 10 rd:5 101000 00101 0 0000000000000 RDFPRS 10 rd:5 101000 00110 0 0000000000000 - RDASR17 10 rd:5 101000 10001 0 0000000000000 + { + RDASR17 10 rd:5 101000 10001 0 0000000000000 + RDPIC 10 rd:5 101000 10001 0 0000000000000 + } RDGSR 10 rd:5 101000 10011 0 0000000000000 RDSOFTINT 10 rd:5 101000 10110 0 0000000000000 RDTICK_CMPR 10 rd:5 101000 10111 0 0000000000000 @@ -114,6 +117,8 @@ CALL 01 i:s30 WRCCR 10 00010 110000 ..... . ............. @n_r_ri WRASI 10 00011 110000 ..... . ............. @n_r_ri WRFPRS 10 00110 110000 ..... . ............. @n_r_ri + WRPCR 10 10000 110000 01000 0 0000000000000 + WRPIC 10 10001 110000 01000 0 0000000000000 { WRGSR 10 10011 110000 ..... . ............. @n_r_ri WRPOWERDOWN 10 10011 110000 ..... . ............. @n_r_ri diff --git a/target/sparc/translate.c b/target/sparc/translate.c index 7e5c735..bfe6364 100644 --- a/target/sparc/translate.c +++ b/target/sparc/translate.c @@ -2882,6 +2882,14 @@ static TCGv do_rd_leon3_config(DisasContext *dc, TCGv dst) TRANS(RDASR17, ASR17, do_rd_special, true, a->rd, do_rd_leon3_config) +static TCGv do_rdpic(DisasContext *dc, TCGv dst) +{ + return tcg_constant_tl(0); +} + +TRANS(RDPIC, HYPV, do_rd_special, supervisor(dc), a->rd, do_rdpic) + + static TCGv do_rdccr(DisasContext *dc, TCGv dst) { gen_helper_rdccr(dst, tcg_env); @@ -3315,6 +3323,17 @@ static void do_wrfprs(DisasContext *dc, TCGv src) TRANS(WRFPRS, 64, do_wr_special, a, true, do_wrfprs) +static bool do_priv_nop(DisasContext *dc, bool priv) +{ + if (!priv) { + return raise_priv(dc); + } + return advance_pc(dc); +} + +TRANS(WRPCR, HYPV, do_priv_nop, supervisor(dc)) +TRANS(WRPIC, HYPV, do_priv_nop, supervisor(dc)) + static void do_wrgsr(DisasContext *dc, TCGv src) { gen_trap_ifnofpu(dc); |