diff mbox series

[PULL,11/17] target/m68k: add reset

Message ID 20180104164251.26494-12-laurent@vivier.eu
State New
Headers show
Series M68k for 2.12 patches | expand

Commit Message

Laurent Vivier Jan. 4, 2018, 4:42 p.m. UTC 
The instruction traps if the CPU is not in
Supervisor state but the helper is empty because
there is no easy way to reset all the peripherals
without resetting the CPU itself.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180104012913.30763-12-laurent@vivier.eu>
---
 target/m68k/helper.c    |  7 +++++++
 target/m68k/helper.h    |  4 ++++
 target/m68k/translate.c | 13 +++++++++++++
 3 files changed, 24 insertions(+)
diff mbox series

Patch

diff --git a/target/m68k/helper.c b/target/m68k/helper.c
index af57ffcea9..52b054e1a3 100644
--- a/target/m68k/helper.c
+++ b/target/m68k/helper.c
@@ -711,3 +711,10 @@  void HELPER(set_mac_extu)(CPUM68KState *env, uint32_t val, uint32_t acc)
     res |= (uint64_t)(val & 0xffff0000) << 16;
     env->macc[acc + 1] = res;
 }
+
+#if defined(CONFIG_SOFTMMU)
+void HELPER(reset)(CPUM68KState *env)
+{
+    /* FIXME: reset all except CPU */
+}
+#endif
diff --git a/target/m68k/helper.h b/target/m68k/helper.h
index 78483da003..d27ea37d60 100644
--- a/target/m68k/helper.h
+++ b/target/m68k/helper.h
@@ -97,3 +97,7 @@  DEF_HELPER_FLAGS_4(bfffo_mem, TCG_CALL_NO_WG, i64, env, i32, s32, i32)
 
 DEF_HELPER_3(chk, void, env, s32, s32)
 DEF_HELPER_4(chk2, void, env, s32, s32, s32)
+
+#if defined(CONFIG_SOFTMMU)
+DEF_HELPER_FLAGS_1(reset, TCG_CALL_NO_RWG, void, env)
+#endif
diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index 98efe6b976..e8f7d07f3f 100644
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -2762,6 +2762,18 @@  DISAS_INSN(unlk)
     tcg_temp_free(src);
 }
 
+#if defined(CONFIG_SOFTMMU)
+DISAS_INSN(reset)
+{
+    if (IS_USER(s)) {
+        gen_exception(s, s->insn_pc, EXCP_PRIVILEGE);
+        return;
+    }
+
+    gen_helper_reset(cpu_env);
+}
+#endif
+
 DISAS_INSN(nop)
 {
 }
@@ -5572,6 +5584,7 @@  void register_m68k_insns (CPUM68KState *env)
 #if defined(CONFIG_SOFTMMU)
     INSN(move_to_usp, 4e60, fff8, USP);
     INSN(move_from_usp, 4e68, fff8, USP);
+    INSN(reset,     4e70, ffff, M68000);
     BASE(stop,      4e72, ffff);
     BASE(rte,       4e73, ffff);
     INSN(movec,     4e7b, ffff, CF_ISA_A);