From 6e10f37c86068e35151f982c976a85f1bec07ef2 Mon Sep 17 00:00:00 2001 From: KONRAD Frederic Date: Fri, 2 Mar 2018 10:59:25 +0100 Subject: sparc: fix leon3 casa instruction when MMU is disabled 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 Signed-off-by: Mark Cave-Ayland --- target/sparc/translate.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'target/sparc/translate.c') diff --git a/target/sparc/translate.c b/target/sparc/translate.c index 71e0853e43..5aa367a182 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; -- cgit v1.2.1