Merge remote-tracking branch...

Merge remote-tracking branch 'remotes/edgar/tags/edgar/xilinx-next-2018-06-15.for-upstream' into staging

xilinx-next-2018-06-15.for-upstream

# gpg: Signature made Fri 15 Jun 2018 15:32:47 BST
# gpg:                using RSA key 29C596780F6BCA83
# gpg: Good signature from "Edgar E. Iglesias (Xilinx key) <edgar.iglesias@xilinx.com>"
# gpg:                 aka "Edgar E. Iglesias <edgar.iglesias@gmail.com>"
# Primary key fingerprint: AC44 FEDC 14F7 F1EB EDBF  4151 29C5 9678 0F6B CA83

* remotes/edgar/tags/edgar/xilinx-next-2018-06-15.for-upstream:
  target-microblaze: Rework NOP/zero instruction handling
  target-microblaze: mmu: Correct masking of output addresses
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target/microblaze/mmu.c

@@ -159,7 +159,6 @@ unsigned int mmu_translate(struct microblaze_mmu *mmu,
 
             lu->vaddr = tlb_tag;
             lu->paddr = tlb_rpn & mmu->c_addr_mask;
-            lu->paddr = tlb_rpn;
             lu->size = tlb_size;
             lu->err = ERR_HIT;
             lu->idx = i;

target/microblaze/translate.c

@@ -90,7 +90,6 @@ typedef struct DisasContext {
     uint32_t jmp_pc;
 
     int abort_at_next_insn;
-    int nr_nops;
     struct TranslationBlock *tb;
     int singlestep_enabled;
 } DisasContext;
@@ -1576,17 +1575,12 @@ static inline void decode(DisasContext *dc, uint32_t ir)
     dc->ir = ir;
     LOG_DIS("%8.8x\t", dc->ir);
 
-    if (dc->ir)
-        dc->nr_nops = 0;
-    else {
+    if (ir == 0) {
         trap_illegal(dc, dc->cpu->env.pvr.regs[2] & PVR2_OPCODE_0x0_ILL_MASK);
-
-        LOG_DIS("nr_nops=%d\t", dc->nr_nops);
-        dc->nr_nops++;
-        if (dc->nr_nops > 4) {
-            cpu_abort(CPU(dc->cpu), "fetching nop sequence\n");
-        }
+        /* Don't decode nop/zero instructions any further.  */
+        return;
     }
+
     /* bit 2 seems to indicate insn type.  */
     dc->type_b = ir & (1 << 29);
 
@@ -1633,7 +1627,6 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
     dc->singlestep_enabled = cs->singlestep_enabled;
     dc->cpustate_changed = 0;
     dc->abort_at_next_insn = 0;
-    dc->nr_nops = 0;
 
     if (pc_start & 3) {
         cpu_abort(cs, "Microblaze: unaligned PC=%x\n", pc_start);