target/sparc: Log unimplemented ASI load/store accesses

When the cache-controller feature is not implemented,
log potential ASI access as unimplemented.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Clément Chigot <chigot@adacore.com>
Message-Id: <20250325123927.74939-4-philmd@linaro.org>

target/sparc/ldst_helper.c

@@ -600,6 +600,9 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong addr,
         case 0x0C:          /* Leon3 Date Cache config */
             if (env->def.features & CPU_FEATURE_CACHE_CTRL) {
                 ret = leon3_cache_control_ld(env, addr, size);
+            } else {
+                qemu_log_mask(LOG_UNIMP, "0x" TARGET_FMT_lx ": unimplemented"
+                                         " address, size: %d\n", addr, size);
             }
             break;
         case 0x01c00a00: /* MXCC control register */
@@ -816,6 +819,9 @@ void helper_st_asi(CPUSPARCState *env, target_ulong addr, uint64_t val,
         case 0x0C:          /* Leon3 Date Cache config */
             if (env->def.features & CPU_FEATURE_CACHE_CTRL) {
                 leon3_cache_control_st(env, addr, val, size);
+            } else {
+                qemu_log_mask(LOG_UNIMP, "0x" TARGET_FMT_lx ": unimplemented"
+                                         " address, size: %d\n", addr, size);
             }
             break;