target/hppa: Report and clear BTLBs via fw_cfg at startup

Report the new number of TLB entries (without BTLBs) to the
guest and drop reporting of BTLB entries which weren't used at all.

Clear all BTLB and TLB entries at machine reset.

Signed-off-by: Helge Deller <deller@gmx.de>

hw/hppa/machine.c

@@ -133,14 +133,10 @@ static FWCfgState *create_fw_cfg(MachineState *ms)
     fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version",
                     g_memdup(&val, sizeof(val)), sizeof(val));
 
-    val = cpu_to_le64(HPPA_TLB_ENTRIES);
+    val = cpu_to_le64(HPPA_TLB_ENTRIES - HPPA_BTLB_ENTRIES);
     fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries",
                     g_memdup(&val, sizeof(val)), sizeof(val));
 
-    val = cpu_to_le64(HPPA_BTLB_ENTRIES);
-    fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries",
-                    g_memdup(&val, sizeof(val)), sizeof(val));
-
     val = cpu_to_le64(HPA_POWER_BUTTON);
     fw_cfg_add_file(fw_cfg, "/etc/power-button-addr",
                     g_memdup(&val, sizeof(val)), sizeof(val));
@@ -433,6 +429,10 @@ static void hppa_machine_reset(MachineState *ms, ShutdownCause reason)
 
         cs->exception_index = -1;
         cs->halted = 0;
+
+        /* clear any existing TLB and BTLB entries */
+        memset(cpu[i]->env.tlb, 0, sizeof(cpu[i]->env.tlb));
+        cpu[i]->env.tlb_last = HPPA_BTLB_ENTRIES;
     }
 
     /* already initialized by machine_hppa_init()? */