From: KONRAD Frederic <frederic.kon...@adacore.com>
Since the commit af7a06bac7d3abb2da48ef3277d2a415772d2ae8:
`casa [..](10), .., ..` (and probably others alternate space instructions)
triggers a data access exception when the MMU is disabled.
When we enter get_asi(...) dc->mem_idx is set to MMU_PHYS_IDX when the MMU
is disabled. Just keep mem_idx unchanged in this case so we passthrough the
MMU when it is disabled.
Signed-off-by: KONRAD Frederic <frederic.kon...@adacore.com>
---
Notes:
Changes RFC -> V1:
* emit the instruction with MMU_PHYS_IDX instead of checking that the MMU
is enabled in get_physical_address(..)
target/sparc/translate.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 71e0853..5aa367a 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -2093,6 +2093,11 @@ static DisasASI get_asi(DisasContext *dc, int insn,
TCGMemOp memop)
type = GET_ASI_BFILL;
break;
}
+
+ /* MMU_PHYS_IDX is used when the MMU is disabled to passthrough the
+ * permissions check in get_physical_address(..).
+ */
+ mem_idx = (dc->mem_idx == MMU_PHYS_IDX) ? MMU_PHYS_IDX : mem_idx;
} else {
gen_exception(dc, TT_PRIV_INSN);
type = GET_ASI_EXCP;
--
1.8.3.1
