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| author | Tom Musta <tommusta@gmail.com> | 2014-12-18 10:34:35 -0600 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2015-01-07 16:16:27 +0100 |
| commit | 56a846157edaba3389eb141e104774451d82ce51 (patch) | |
| tree | 31a96bb3ec72a229b86a7e6380cb0512507a02b2 /target-ppc/translate.c | |
| parent | 0ff93d11bc0890b2569f748266c04f4417ec3233 (diff) | |
| download | qemu-56a846157edaba3389eb141e104774451d82ce51.tar.gz qemu-56a846157edaba3389eb141e104774451d82ce51.tar.bz2 qemu-56a846157edaba3389eb141e104774451d82ce51.zip | |
target-ppc: Introduce TM Noops
Add degenerate implementations of the non-privileged Transactional
Memory instructions tend., tabort*. and tsr. This implementation
simply checks the MSR[TM] bit and then sets CR0 to 0b0000. This
is a reasonable degenerate implementation since transactions are
never allowed to begin and hence MSR[TS] is always 0b00.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/translate.c')
| -rw-r--r-- | target-ppc/translate.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/target-ppc/translate.c b/target-ppc/translate.c index f4a0332ca9..9c820d1e88 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -9683,6 +9683,30 @@ static void gen_tbegin(DisasContext *ctx) gen_helper_tbegin(cpu_env); } +#define GEN_TM_NOOP(name) \ +static inline void gen_##name(DisasContext *ctx) \ +{ \ + if (unlikely(!ctx->tm_enabled)) { \ + gen_exception_err(ctx, POWERPC_EXCP_FU, FSCR_IC_TM); \ + return; \ + } \ + /* Because tbegin always fails in QEMU, these user \ + * space instructions all have a simple implementation: \ + * \ + * CR[0] = 0b0 || MSR[TS] || 0b0 \ + * = 0b0 || 0b00 || 0b0 \ + */ \ + tcg_gen_movi_i32(cpu_crf[0], 0); \ +} + +GEN_TM_NOOP(tend); +GEN_TM_NOOP(tabort); +GEN_TM_NOOP(tabortwc); +GEN_TM_NOOP(tabortwci); +GEN_TM_NOOP(tabortdc); +GEN_TM_NOOP(tabortdci); +GEN_TM_NOOP(tsr); + static opcode_t opcodes[] = { GEN_HANDLER(invalid, 0x00, 0x00, 0x00, 0xFFFFFFFF, PPC_NONE), GEN_HANDLER(cmp, 0x1F, 0x00, 0x00, 0x00400000, PPC_INTEGER), @@ -11098,6 +11122,20 @@ GEN_SPEOP_LDST(evstwwo, 0x1E, 2), GEN_HANDLER2_E(tbegin, "tbegin", 0x1F, 0x0E, 0x14, 0x01DFF800, \ PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tend, "tend", 0x1F, 0x0E, 0x15, 0x01FFF800, \ + PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tabort, "tabort", 0x1F, 0x0E, 0x1C, 0x03E0F800, \ + PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tabortwc, "tabortwc", 0x1F, 0x0E, 0x18, 0x00000000, \ + PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tabortwci, "tabortwci", 0x1F, 0x0E, 0x1A, 0x00000000, \ + PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tabortdc, "tabortdc", 0x1F, 0x0E, 0x19, 0x00000000, \ + PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tabortdci, "tabortdci", 0x1F, 0x0E, 0x1B, 0x00000000, \ + PPC_NONE, PPC2_TM), +GEN_HANDLER2_E(tsr, "tsr", 0x1F, 0x0E, 0x17, 0x03DFF800, \ + PPC_NONE, PPC2_TM), }; #include "helper_regs.h" |