For upstream

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Merge remote-tracking branch 'remotes/edgar/tags/edgar/xilinx-next-2020-04-30.for-upstream' into staging

For upstream

# gpg: Signature made Thu 30 Apr 2020 11:14:13 BST
# gpg:                using RSA key AC44FEDC14F7F1EBEDBF415129C596780F6BCA83
# gpg: Good signature from "Edgar E. Iglesias (Xilinx key) <edgar.iglesias@xilinx.com>" [unknown]
# gpg:                 aka "Edgar E. Iglesias <edgar.iglesias@gmail.com>" [full]
# Primary key fingerprint: AC44 FEDC 14F7 F1EB EDBF  4151 29C5 9678 0F6B CA83

* remotes/edgar/tags/edgar/xilinx-next-2020-04-30.for-upstream:
  target/microblaze: Add the pvr-user2 property
  target/microblaze: Add the pvr-user1 property
  target/microblaze: Add the unaligned-exceptions property
  target/microblaze: Add the div-zero-exception property
  target/microblaze: Add the ill-opcode-exception property
  target/microblaze: Add the opcode-0x0-illegal CPU property

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

target/microblaze/cpu.c

@@ -193,8 +193,10 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
                         (cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) |
                         (cpu->cfg.endi ? PVR0_ENDI_MASK : 0) |
                         (version_code << PVR0_VERSION_SHIFT) |
-                        (cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0);
+                        (cpu->cfg.pvr == C_PVR_FULL ? PVR0_PVR_FULL_MASK : 0) |
+                        cpu->cfg.pvr_user1;
 
+    env->pvr.regs[1] = cpu->cfg.pvr_user2;
     env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) |
                         (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0) |
                         (cpu->cfg.use_hw_mul ? PVR2_USE_HW_MUL_MASK : 0) |
@@ -206,7 +208,15 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp)
                         (cpu->cfg.dopb_bus_exception ?
                                                  PVR2_DOPB_BUS_EXC_MASK : 0) |
                         (cpu->cfg.iopb_bus_exception ?
-                                                 PVR2_IOPB_BUS_EXC_MASK : 0);
+                                                 PVR2_IOPB_BUS_EXC_MASK : 0) |
+                        (cpu->cfg.div_zero_exception ?
+                                                 PVR2_DIV_ZERO_EXC_MASK : 0) |
+                        (cpu->cfg.illegal_opcode_exception ?
+                                                PVR2_ILL_OPCODE_EXC_MASK : 0) |
+                        (cpu->cfg.unaligned_exceptions ?
+                                                PVR2_UNALIGNED_EXC_MASK : 0) |
+                        (cpu->cfg.opcode_0_illegal ?
+                                                 PVR2_OPCODE_0x0_ILL_MASK : 0);
 
     env->pvr.regs[5] |= cpu->cfg.dcache_writeback ?
                                         PVR5_DCACHE_WRITEBACK_MASK : 0;
@@ -274,8 +284,18 @@ 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("div-zero-exception", MicroBlazeCPU,
+                     cfg.div_zero_exception, false),
+    DEFINE_PROP_BOOL("unaligned-exceptions", MicroBlazeCPU,
+                     cfg.unaligned_exceptions, false),
+    DEFINE_PROP_BOOL("opcode-0x0-illegal", MicroBlazeCPU,
+                     cfg.opcode_0_illegal, false),
     DEFINE_PROP_STRING("version", MicroBlazeCPU, cfg.version),
     DEFINE_PROP_UINT8("pvr", MicroBlazeCPU, cfg.pvr, C_PVR_FULL),
+    DEFINE_PROP_UINT8("pvr-user1", MicroBlazeCPU, cfg.pvr_user1, 0),
+    DEFINE_PROP_UINT32("pvr-user2", MicroBlazeCPU, cfg.pvr_user2, 0),
     DEFINE_PROP_END_OF_LIST(),
 };
 

target/microblaze/cpu.h

@@ -303,6 +303,12 @@ struct MicroBlazeCPU {
         bool endi;
         bool dopb_bus_exception;
         bool iopb_bus_exception;
+        bool illegal_opcode_exception;
+        bool opcode_0_illegal;
+        bool div_zero_exception;
+        bool unaligned_exceptions;
+        uint8_t pvr_user1;
+        uint32_t pvr_user2;
         char *version;
         uint8_t pvr;
     } cfg;

target/microblaze/op_helper.c

@@ -132,11 +132,12 @@ uint32_t helper_carry(uint32_t a, uint32_t b, uint32_t cf)
 
 static inline int div_prepare(CPUMBState *env, uint32_t a, uint32_t b)
 {
+    MicroBlazeCPU *cpu = env_archcpu(env);
+
     if (b == 0) {
         env->sregs[SR_MSR] |= MSR_DZ;
 
-        if ((env->sregs[SR_MSR] & MSR_EE)
+        if ((env->sregs[SR_MSR] & MSR_EE) && cpu->cfg.div_zero_exception) {
-            && !(env->pvr.regs[2] & PVR2_DIV_ZERO_EXC_MASK)) {
             env->sregs[SR_ESR] = ESR_EC_DIVZERO;
             helper_raise_exception(env, EXCP_HW_EXCP);
         }

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);
     }
@@ -995,7 +995,7 @@ static void dec_load(DisasContext *dc)
     v = tcg_temp_new_i32();
     tcg_gen_qemu_ld_i32(v, addr, mem_index, mop);
 
-    if ((dc->cpu->env.pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
+    if (dc->cpu->cfg.unaligned_exceptions && size > 1) {
         TCGv_i32 t0 = tcg_const_i32(0);
         TCGv_i32 treg = tcg_const_i32(dc->rd);
         TCGv_i32 tsize = tcg_const_i32(size - 1);
@@ -1110,7 +1110,7 @@ static void dec_store(DisasContext *dc)
     tcg_gen_qemu_st_i32(cpu_R[dc->rd], addr, mem_index, mop);
 
     /* Verify alignment if needed.  */
-    if ((dc->cpu->env.pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) {
+    if (dc->cpu->cfg.unaligned_exceptions && size > 1) {
         TCGv_i32 t1 = tcg_const_i32(1);
         TCGv_i32 treg = tcg_const_i32(dc->rd);
         TCGv_i32 tsize = tcg_const_i32(size - 1);
@@ -1573,7 +1573,7 @@ static inline void decode(DisasContext *dc, uint32_t ir)
     LOG_DIS("%8.8x\t", dc->ir);
 
     if (ir == 0) {
-        trap_illegal(dc, dc->cpu->env.pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK);
+        trap_illegal(dc, dc->cpu->cfg.opcode_0_illegal);
         /* Don't decode nop/zero instructions any further.  */
         return;
     }