microblaze: HW Exception fixes.

* Correct PVR checks for masking off individual exceptions.
* Correct FPU exception code.
* Set EAR on unaligned and unassigned exceptions.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>

2 files changed, 21 insertions, 19 deletions

diff --git a/target-microblaze/op_helper.c b/target-microblaze/op_helper.c
index 89dbc0c..ee4f623 100644
--- a/target-microblaze/op_helper.c
+++ b/target-microblaze/op_helper.c
@@ -209,17 +209,18 @@ uint32_t helper_pcmpbf(uint32_t a, uint32_t b)
 void helper_memalign(uint32_t addr, uint32_t dr, uint32_t wr, uint32_t mask)
 {
     if (addr & mask) {
-            qemu_log("unaligned access addr=%x mask=%x, wr=%d\n",
-                     addr, mask, wr);
-            if (!(env->sregs[SR_MSR] & MSR_EE)) {
-                return;
-            }
-
+            qemu_log_mask(CPU_LOG_INT,
+                          "unaligned access addr=%x mask=%x, wr=%d dr=r%d\n",
+                          addr, mask, wr, dr);
+            env->sregs[SR_EAR] = addr;
             env->sregs[SR_ESR] = ESR_EC_UNALIGNED_DATA | (wr << 10) \
                                  | (dr & 31) << 5;
             if (mask == 3) {
                 env->sregs[SR_ESR] |= 1 << 11;
             }
+            if (!(env->sregs[SR_MSR] & MSR_EE)) {
+                return;
+            }
             helper_raise_exception(EXCP_HW_EXCP);
     }
 }
@@ -245,19 +246,20 @@ void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
        generated code */
     saved_env = env;
     env = cpu_single_env;
-    qemu_log("Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
+    qemu_log_mask(CPU_LOG_INT, "Unassigned " TARGET_FMT_plx " wr=%d exe=%d\n",
              addr, is_write, is_exec);
     if (!(env->sregs[SR_MSR] & MSR_EE)) {
         return;
     }
 
+    env->sregs[SR_EAR] = addr;
     if (is_exec) {
-        if (!(env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
+        if ((env->pvr.regs[2] & PVR2_IOPB_BUS_EXC_MASK)) {
             env->sregs[SR_ESR] = ESR_EC_INSN_BUS;
             helper_raise_exception(EXCP_HW_EXCP);
         }
     } else {
-        if (!(env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
+        if ((env->pvr.regs[2] & PVR2_DOPB_BUS_EXC_MASK)) {
             env->sregs[SR_ESR] = ESR_EC_DATA_BUS;
             helper_raise_exception(EXCP_HW_EXCP);
         }
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c
index bb37f04..79f1216 100644
--- a/target-microblaze/translate.c
+++ b/target-microblaze/translate.c
@@ -232,7 +232,7 @@ static void dec_pattern(DisasContext *dc)
     int l1;
 
     if ((dc->tb_flags & MSR_EE_FLAG)
-          && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
+          && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
           && !((dc->env->pvr.regs[2] & PVR2_USE_PCMP_INSTR))) {
         tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
@@ -553,7 +553,7 @@ static void dec_mul(DisasContext *dc)
     unsigned int subcode;
 
     if ((dc->tb_flags & MSR_EE_FLAG)
-         && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
+         && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
          && !(dc->env->pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) {
         tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
@@ -610,7 +610,7 @@ static void dec_div(DisasContext *dc)
     u = dc->imm & 2; 
     LOG_DIS("div\n");
 
-    if (!(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
+    if ((dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
           && !((dc->env->pvr.regs[0] & PVR0_USE_DIV_MASK))) {
         tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
@@ -630,7 +630,7 @@ static void dec_barrel(DisasContext *dc)
     unsigned int s, t;
 
     if ((dc->tb_flags & MSR_EE_FLAG)
-          && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
+          && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
           && !(dc->env->pvr.regs[0] & PVR0_USE_BARREL_MASK)) {
         tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
@@ -804,7 +804,7 @@ static void dec_load(DisasContext *dc)
 
     size = 1 << (dc->opcode & 3);
     if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
-          && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
+          && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
         tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
         return;
@@ -856,7 +856,7 @@ static void dec_store(DisasContext *dc)
     size = 1 << (dc->opcode & 3);
 
     if (size > 4 && (dc->tb_flags & MSR_EE_FLAG)
-          && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
+          && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)) {
         tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
         return;
@@ -1112,9 +1112,9 @@ static void dec_rts(DisasContext *dc)
 static void dec_fpu(DisasContext *dc)
 {
     if ((dc->tb_flags & MSR_EE_FLAG)
-          && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
+          && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
           && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) {
-        tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
+        tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU);
         t_gen_raise_exception(dc, EXCP_HW_EXCP);
         return;
     }
@@ -1171,8 +1171,8 @@ static inline void decode(DisasContext *dc)
         dc->nr_nops = 0;
     else {
         if ((dc->tb_flags & MSR_EE_FLAG)
-              && !(dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
-              && !(dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
+              && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
+              && (dc->env->pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK)) {
             tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP);
             t_gen_raise_exception(dc, EXCP_HW_EXCP);
             return;