target/sparc: implement asr17 feature for smp

This allows the guest program to know its cpu id.

Co-developed-by: Frederic Konrad <konrad.frederic@yahoo.fr>
Signed-off-by: Clément Chigot <chigot@adacore.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240131085047.18458-6-chigot@adacore.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

diff --git a/target/sparc/helper.c b/target/sparc/helper.c
index bd10b60e4bfb2bdb42dec24ea30045a62621f297..2247e243b5e1bbf31bd6d00819d6678227295ba2 100644 (file)
--- a/target/sparc/helper.c
+++ b/target/sparc/helper.c
@@ -212,4 +212,20 @@ void helper_power_down(CPUSPARCState *env)
     env->npc = env->pc + 4;
     cpu_loop_exit(cs);
 }
+
+target_ulong helper_rdasr17(CPUSPARCState *env)
+{
+    CPUState *cs = env_cpu(env);
+    target_ulong val;
+
+    /*
+     * TODO: There are many more fields to be filled,
+     * some of which are writable.
+     */
+    val = env->def.nwindows - 1;    /* [4:0]   NWIN   */
+    val |= 1 << 8;                  /* [8]      V8    */
+    val |= (cs->cpu_index) << 28;   /* [31:28] INDEX  */
+
+    return val;
+}
 #endif

diff --git a/target/sparc/helper.h b/target/sparc/helper.h
index 6a42ba4e9ef3b92a1133688da9a3ea4ac3e2018f..e55fad5b8cbb2b19aa1bfabb9734d79e4d8001de 100644 (file)
--- a/target/sparc/helper.h
+++ b/target/sparc/helper.h
@@ -2,6 +2,7 @@
 DEF_HELPER_1(rett, void, env)
 DEF_HELPER_2(wrpsr, void, env, tl)
 DEF_HELPER_1(rdpsr, tl, env)
+DEF_HELPER_1(rdasr17, tl, env)
 DEF_HELPER_1(power_down, void, env)
 #else
 DEF_HELPER_FLAGS_2(wrpil, TCG_CALL_NO_RWG, void, env, tl)

diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index d9304a5bc4e89b99a0b23953dccac8d9c6a3a6d3..692ce0b01053ad0c93ae474d0d9a0c32c766a6b3 100644 (file)
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -37,6 +37,7 @@
 
 #ifdef TARGET_SPARC64
 # define gen_helper_rdpsr(D, E)                 qemu_build_not_reached()
+# define gen_helper_rdasr17(D, E)               qemu_build_not_reached()
 # define gen_helper_rett(E)                     qemu_build_not_reached()
 # define gen_helper_power_down(E)               qemu_build_not_reached()
 # define gen_helper_wrpsr(E, S)                 qemu_build_not_reached()
@@ -2382,16 +2383,8 @@ static bool trans_RDY(DisasContext *dc, arg_RDY *a)
 
 static TCGv do_rd_leon3_config(DisasContext *dc, TCGv dst)
 {
-    uint32_t val;
-
-    /*
-     * TODO: There are many more fields to be filled,
-     * some of which are writable.
-     */
-    val = dc->def->nwindows - 1;   /* [4:0] NWIN */
-    val |= 1 << 8;                 /* [8]   V8   */
-
-    return tcg_constant_tl(val);
+    gen_helper_rdasr17(dst, tcg_env);
+    return dst;
 }
 
 TRANS(RDASR17, ASR17, do_rd_special, true, a->rd, do_rd_leon3_config)