@@ -1652,18 +1652,10 @@ static void _decode_opc(DisasContext * ctx)
}
return;
case 0x00a3: /* ocbp @Rn */
- {
- TCGv dummy = tcg_temp_new();
- tcg_gen_qemu_ld32s(dummy, REG(B11_8), ctx->memidx);
- tcg_temp_free(dummy);
- }
- return;
case 0x00b3: /* ocbwb @Rn */
- {
- TCGv dummy = tcg_temp_new();
- tcg_gen_qemu_ld32s(dummy, REG(B11_8), ctx->memidx);
- tcg_temp_free(dummy);
- }
+ /* These instructions are supposed to do nothing in case of
+ a cache miss. Given that we only partially emulate caches
+ it is safe to simply ignore them. */
return;
case 0x0083: /* pref @Rn */
return;
ocbp and ocbwb controls the writeback of a cache line to memory. They are supposed to do nothing in case of a cache miss. Given QEMU only partially emulate caches, it is safe to ignore these instructions. This fixes a kernel oops when trying to access an rtl8139 NIC with recent versions. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> --- target-sh4/translate.c | 14 +++----------- 1 files changed, 3 insertions(+), 11 deletions(-)