target/microblaze: Add the ill-opcode-exception property

Add the ill-opcode-exception property to control if illegal
instructions will raise exceptions.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c
index 418a0cd1fa049d047365532306e65cd319855152..2cc6b1513cdd817232f74ea82a75cb6f437aede0 100644 (file)
--- a/target/microblaze/cpu.c
+++ b/target/microblaze/cpu.c
@@ -207,6 +207,8 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
                                                  PVR2_DOPB_BUS_EXC_MASK : 0) |
                         (cpu->cfg.iopb_bus_exception ?
                                                  PVR2_IOPB_BUS_EXC_MASK : 0) |
+                        (cpu->cfg.illegal_opcode_exception ?
+                                                PVR2_ILL_OPCODE_EXC_MASK : 0) |
                         (cpu->cfg.opcode_0_illegal ?
                                                  PVR2_OPCODE_0x0_ILL_MASK : 0);
 
@@ -276,6 +278,8 @@ static Property mb_properties[] = {
     /* Enables bus exceptions on failed instruction fetches.  */
     DEFINE_PROP_BOOL("iopb-bus-exception", MicroBlazeCPU,
                      cfg.iopb_bus_exception, false),
+    DEFINE_PROP_BOOL("ill-opcode-exception", MicroBlazeCPU,
+                     cfg.illegal_opcode_exception, false),
     DEFINE_PROP_BOOL("opcode-0x0-illegal", MicroBlazeCPU,
                      cfg.opcode_0_illegal, false),
     DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version),

diff --git a/target/microblaze/cpu.h b/target/microblaze/cpu.h
index d51587b3428c36cee80459683390aeaaa71e67d8..71d7317a58a1925ce11beab6be052a2d66405fff 100644 (file)
--- a/target/microblaze/cpu.h
+++ b/target/microblaze/cpu.h
@@ -303,6 +303,7 @@ struct MicroBlazeCPU {
         bool endi;
         bool dopb_bus_exception;
         bool iopb_bus_exception;
+        bool illegal_opcode_exception;
         bool opcode_0_illegal;
         char *version;
         uint8_t pvr;

diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 222632b670664f0e3056a254a836704ba8066341..b4a78551ef588e1ac3bb0510f05b8b3c0312c2fb 100644 (file)
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -185,7 +185,7 @@ static void write_carryi(DisasContext *dc, bool carry)
 static bool trap_illegal(DisasContext *dc, bool cond)
 {
     if (cond && (dc->tb_flags & MSR_EE_FLAG)
-        && (dc->cpu->env.pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
+        && dc->cpu->cfg.illegal_opcode_exception) {
         tcg_gen_movi_i64(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
     }