target/openrisc: Increase the TLB size

The architecture supports 128 TLB entries. There is no reason not to provide all of them. In the process we need to fix a bug that failed to parameterize the configuration register that tells the operating system the number of entries. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Stafford Horne <shorne@gmail.com> --- v2: - Change VMState version.
qemu · Jul 2, 2018 · 1cc9e5d · 1cc9e5d
1 parent 5ce5dad
commit 1cc9e5d
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Showing 3 changed files with 7 additions and 6 deletions.
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
@@ -57,8 +57,10 @@ static void openrisc_cpu_reset(CPUState *s)
 
     cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP |
                    UPR_PMP;
-    cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2)) | (DMMUCFGR_NTS & (6 << 2));
-    cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2)) | (IMMUCFGR_NTS & (6 << 2));
+    cpu->env.dmmucfgr = (DMMUCFGR_NTW & (0 << 2))
+                      | (DMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
+    cpu->env.immucfgr = (IMMUCFGR_NTW & (0 << 2))
+                      | (IMMUCFGR_NTS & (ctz32(TLB_SIZE) << 2));
 
 #ifndef CONFIG_USER_ONLY
     cpu->env.picmr = 0x00000000;

diff --git a/target/openrisc/cpu.h b/target/openrisc/cpu.h
@@ -222,7 +222,7 @@ enum {
 
 /* TLB size */
 enum {
-    TLB_SIZE = 64,
+    TLB_SIZE = 128,
     TLB_MASK = TLB_SIZE - 1,
 };
 

diff --git a/target/openrisc/machine.c b/target/openrisc/machine.c
@@ -38,9 +38,8 @@ static const VMStateDescription vmstate_tlb_entry = {
 
 static const VMStateDescription vmstate_cpu_tlb = {
     .name = "cpu_tlb",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .minimum_version_id_old = 1,
+    .version_id = 2,
+    .minimum_version_id = 2,
     .fields = (VMStateField[]) {
         VMSTATE_STRUCT_ARRAY(itlb, CPUOpenRISCTLBContext, TLB_SIZE, 0,
                              vmstate_tlb_entry, OpenRISCTLBEntry),