From: Laurent Vivier <laurent@vivier.eu>
Date: Thu, 4 Jan 2018 01:29:07 +0000 (+0100)
Subject: target/m68k: add reset
X-Git-Tag: v2.12.0-rc0~170^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0bdb2b3bf5660f892ddbfa09baea56cdca57ad1d;p=thirdparty%2Fqemu.git

target/m68k: add reset

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>
---

diff --git a/target/m68k/helper.c b/target/m68k/helper.c
index af57ffcea95..52b054e1a3d 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 78483da0036..d27ea37d60e 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 98efe6b976e..e8f7d07f3f8 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);