target/microblaze: Convert to CPUClass::tlb_fill

Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/microblaze/cpu.c

@@ -304,9 +304,8 @@ static void mb_cpu_class_init(ObjectClass *oc, void *data)
     cc->set_pc = mb_cpu_set_pc;
     cc->gdb_read_register = mb_cpu_gdb_read_register;
     cc->gdb_write_register = mb_cpu_gdb_write_register;
-#ifdef CONFIG_USER_ONLY
-    cc->handle_mmu_fault = mb_cpu_handle_mmu_fault;
-#else
+    cc->tlb_fill = mb_cpu_tlb_fill;
+#ifndef CONFIG_USER_ONLY
     cc->do_transaction_failed = mb_cpu_transaction_failed;
     cc->get_phys_page_debug = mb_cpu_get_phys_page_debug;
 #endif

target/microblaze/cpu.h

@@ -374,8 +374,9 @@ static inline int cpu_mmu_index (CPUMBState *env, bool ifetch)
     return MMU_KERNEL_IDX;
 }
 
-int mb_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int size, int rw,
-                            int mmu_idx);
+bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+                     MMUAccessType access_type, int mmu_idx,
+                     bool probe, uintptr_t retaddr);
 
 #include "exec/cpu-all.h"
 

target/microblaze/helper.c

@@ -38,73 +38,80 @@ void mb_cpu_do_interrupt(CPUState *cs)
     env->regs[14] = env->sregs[SR_PC];
 }
 
-int mb_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size, int rw,
-                            int mmu_idx)
+bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+                     MMUAccessType access_type, int mmu_idx,
+                     bool probe, uintptr_t retaddr)
 {
     cs->exception_index = 0xaa;
-    cpu_dump_state(cs, stderr, 0);
-    return 1;
+    cpu_loop_exit_restore(cs, retaddr);
 }
 
 #else /* !CONFIG_USER_ONLY */
 
-int mb_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int size, int rw,
-                            int mmu_idx)
+bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+                     MMUAccessType access_type, int mmu_idx,
+                     bool probe, uintptr_t retaddr)
 {
     MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
     CPUMBState *env = &cpu->env;
+    struct microblaze_mmu_lookup lu;
     unsigned int hit;
-    int r = 1;
     int prot;
 
-    /* Translate if the MMU is available and enabled.  */
-    if (mmu_idx != MMU_NOMMU_IDX) {
-        uint32_t vaddr, paddr;
-        struct microblaze_mmu_lookup lu;
-
-        hit = mmu_translate(&env->mmu, &lu, address, rw, mmu_idx);
-        if (hit) {
-            vaddr = address & TARGET_PAGE_MASK;
-            paddr = lu.paddr + vaddr - lu.vaddr;
-
-            qemu_log_mask(CPU_LOG_MMU, "MMU map mmu=%d v=%x p=%x prot=%x\n",
-                    mmu_idx, vaddr, paddr, lu.prot);
-            tlb_set_page(cs, vaddr, paddr, lu.prot, mmu_idx, TARGET_PAGE_SIZE);
-            r = 0;
-        } else {
-            env->sregs[SR_EAR] = address;
-            qemu_log_mask(CPU_LOG_MMU, "mmu=%d miss v=%" VADDR_PRIx "\n",
-                                        mmu_idx, address);
-
-            switch (lu.err) {
-                case ERR_PROT:
-                    env->sregs[SR_ESR] = rw == 2 ? 17 : 16;
-                    env->sregs[SR_ESR] |= (rw == 1) << 10;
-                    break;
-                case ERR_MISS:
-                    env->sregs[SR_ESR] = rw == 2 ? 19 : 18;
-                    env->sregs[SR_ESR] |= (rw == 1) << 10;
-                    break;
-                default:
-                    abort();
-                    break;
-            }
-
-            if (cs->exception_index == EXCP_MMU) {
-                cpu_abort(cs, "recursive faults\n");
-            }
-
-            /* TLB miss.  */
-            cs->exception_index = EXCP_MMU;
-        }
-    } else {
+    if (mmu_idx == MMU_NOMMU_IDX) {
         /* MMU disabled or not available.  */
         address &= TARGET_PAGE_MASK;
         prot = PAGE_BITS;
         tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
-        r = 0;
+        return true;
     }
-    return r;
+
+    hit = mmu_translate(&env->mmu, &lu, address, access_type, mmu_idx);
+    if (likely(hit)) {
+        uint32_t vaddr = address & TARGET_PAGE_MASK;
+        uint32_t paddr = lu.paddr + vaddr - lu.vaddr;
+
+        qemu_log_mask(CPU_LOG_MMU, "MMU map mmu=%d v=%x p=%x prot=%x\n",
+                      mmu_idx, vaddr, paddr, lu.prot);
+        tlb_set_page(cs, vaddr, paddr, lu.prot, mmu_idx, TARGET_PAGE_SIZE);
+        return true;
+    }
+
+    /* TLB miss.  */
+    if (probe) {
+        return false;
+    }
+
+    qemu_log_mask(CPU_LOG_MMU, "mmu=%d miss v=%" VADDR_PRIx "\n",
+                  mmu_idx, address);
+
+    env->sregs[SR_EAR] = address;
+    switch (lu.err) {
+    case ERR_PROT:
+        env->sregs[SR_ESR] = access_type == MMU_INST_FETCH ? 17 : 16;
+        env->sregs[SR_ESR] |= (access_type == MMU_DATA_STORE) << 10;
+        break;
+    case ERR_MISS:
+        env->sregs[SR_ESR] = access_type == MMU_INST_FETCH ? 19 : 18;
+        env->sregs[SR_ESR] |= (access_type == MMU_DATA_STORE) << 10;
+        break;
+    default:
+        abort();
+    }
+
+    if (cs->exception_index == EXCP_MMU) {
+        cpu_abort(cs, "recursive faults\n");
+    }
+
+    /* TLB miss.  */
+    cs->exception_index = EXCP_MMU;
+    cpu_loop_exit_restore(cs, retaddr);
+}
+
+void tlb_fill(CPUState *cs, target_ulong addr, int size,
+              MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
+{
+    mb_cpu_tlb_fill(cs, addr, size, access_type, mmu_idx, false, retaddr);
 }
 
 void mb_cpu_do_interrupt(CPUState *cs)

target/microblaze/op_helper.c

@@ -28,25 +28,6 @@
 
 #define D(x)
 
-#if !defined(CONFIG_USER_ONLY)
-
-/* Try to fill the TLB and return an exception if error. If retaddr is
- * NULL, it means that the function was called in C code (i.e. not
- * from generated code or from helper.c)
- */
-void tlb_fill(CPUState *cs, target_ulong addr, int size,
-              MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
-{
-    int ret;
-
-    ret = mb_cpu_handle_mmu_fault(cs, addr, size, access_type, mmu_idx);
-    if (unlikely(ret)) {
-        /* now we have a real cpu fault */
-        cpu_loop_exit_restore(cs, retaddr);
-    }
-}
-#endif
-
 void helper_put(uint32_t id, uint32_t ctrl, uint32_t data)
 {
     int test = ctrl & STREAM_TEST;