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target/m68k: add cpush/cinv

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Add cache lines invalidate and cache lines push
as no-op operations, as we don't have cache.

These instructions are 68040 only.

Backports commit f58ed1c50add3e76331afdc92387c0da9dd9e443 from qemu
This commit is contained in:
Laurent Vivier 2018-03-06 08:24:04 -05:00 committed by Lioncash
parent 6487da53eb
commit c5643956e3
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 20 additions and 0 deletions
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20
qemu/target/m68k/translate.c
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@ -4677,6 +4677,24 @@ DISAS_INSN(cpushl)
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(cpush)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* Cache push/invalidate. Implement as no-op. */
}
DISAS_INSN(cinv)
{
if (IS_USER(s)) {
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
return;
}
/* Invalidate cache line. Implement as no-op. */
}
DISAS_INSN(wddata)
{
gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
@ -5884,6 +5902,8 @@ void register_m68k_insns (CPUM68KState *env)
INSN(fsave, f300, ffc0, FPU);
INSN(intouch, f340, ffc0, CF_ISA_A);
INSN(cpushl, f428, ff38, CF_ISA_A);
INSN(cpush, f420, ff20, M68040);
INSN(cinv, f400, ff20, M68040);
INSN(wddata, fb00, ff00, CF_ISA_A);
INSN(wdebug, fbc0, ffc0, CF_ISA_A);
#endif