diff options
| author | Alexander Graf <agraf@suse.de> | 2013-11-28 14:04:25 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2013-12-13 15:57:05 +0000 |
| commit | a60605da72e6db4fc74b79715b8a96af281a21b8 (patch) | |
| tree | da35e437301488922ef87435d3f3ba1033d329d5 | |
| parent | b191bc501d4b526c753116b06e6758309bf8b6bd (diff) | |
target-arm: A64: implement SVC, BRKa64-third-set
Add decoding for the exception generating instructions, and implement
SVC (syscalls) and BRK (software breakpoint).
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
| -rw-r--r-- | target-arm/translate-a64.c | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index b3e94497ca..56d1616ad9 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -806,10 +806,57 @@ static void disas_system(DisasContext *s, uint32_t insn) } } -/* Exception generation */ +/* C3.2.3 Exception generation + * + * 31 24 23 21 20 5 4 2 1 0 + * +-----------------+-----+------------------------+-----+----+ + * | 1 1 0 1 0 1 0 0 | opc | imm16 | op2 | LL | + * +-----------------------+------------------------+----------+ + */ static void disas_exc(DisasContext *s, uint32_t insn) { - unsupported_encoding(s, insn); + int opc = extract32(insn, 21, 3); + int op2_ll = extract32(insn, 0, 5); + + switch (opc) { + case 0: + /* SVC, HVC, SMC; since we don't support the Virtualization + * or TrustZone extensions these all UNDEF except SVC. + */ + if (op2_ll != 1) { + unallocated_encoding(s); + break; + } + gen_exception_insn(s, 0, EXCP_SWI); + break; + case 1: + if (op2_ll != 0) { + unallocated_encoding(s); + break; + } + /* BRK */ + gen_exception_insn(s, 0, EXCP_BKPT); + break; + case 2: + if (op2_ll != 0) { + unallocated_encoding(s); + break; + } + /* HLT */ + unsupported_encoding(s, insn); + break; + case 5: + if (op2_ll < 1 || op2_ll > 3) { + unallocated_encoding(s); + break; + } + /* DCPS1, DCPS2, DCPS3 */ + unsupported_encoding(s, insn); + break; + default: + unallocated_encoding(s); + break; + } } /* C3.2.7 Unconditional branch (register) |