commit c870e3f52cac0c8a4a1377398327c4ff20d49d41
author Yongbok Kim <yongbok.kim@imgtec.com> Tue Mar 15 09:59:27 2016 +0000
committer Leon Alrae <leon.alrae@imgtec.com> Wed Mar 30 09:13:59 2016 +0100
tree 2756e94fce28c6ca90448734ea62d66e20b9b80f
parent 8e7e8a5b7b95c143f396f6aadd310e9ff2f7efd3

target-mips: add CMGCRBase register

Physical base address for the memory-mapped Coherency Manager Global
Configuration Register space.
The MIPS default location for the GCR_BASE address is 0x1FBF_8.
This register only exists if Config3 CMGCR is set to one.

Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
[leon.alrae@imgtec.com: move CMGCR enabling to a separate patch]
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>

target-mips/cpu.h

diff --git a/target-mips/cpu.h b/target-mips/cpu.h
index 4f3ebb9..55d3224 100644
--- a/target-mips/cpu.h
+++ b/target-mips/cpu.h
@@ -395,6 +395,7 @@
     target_ulong CP0_EPC;
     int32_t CP0_PRid;
     int32_t CP0_EBase;
+    target_ulong CP0_CMGCRBase;
     int32_t CP0_Config0;
 #define CP0C0_M    31
 #define CP0C0_K23  28
@@ -437,7 +438,7 @@
     int32_t CP0_Config3;
 #define CP0C3_M    31
 #define CP0C3_BPG  30
-#define CP0C3_CMCGR 29
+#define CP0C3_CMGCR 29
 #define CP0C3_MSAP  28
 #define CP0C3_BP 27
 #define CP0C3_BI 26

target-mips/translate.c

diff --git a/target-mips/translate.c b/target-mips/translate.c
index 0f43bf4..8191b92 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -1432,6 +1432,7 @@
     int CP0_LLAddr_shift;
     bool ps;
     bool vp;
+    bool cmgcr;
 } DisasContext;
 
 enum {
@@ -5298,6 +5299,13 @@
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_EBase));
             rn = "EBase";
             break;
+        case 3:
+            check_insn(ctx, ISA_MIPS32R2);
+            CP0_CHECK(ctx->cmgcr);
+            tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_CMGCRBase));
+            tcg_gen_ext32s_tl(arg, arg);
+            rn = "CMGCRBase";
+            break;
         default:
             goto cp0_unimplemented;
        }
@@ -6572,6 +6580,12 @@
             gen_mfc0_load32(arg, offsetof(CPUMIPSState, CP0_EBase));
             rn = "EBase";
             break;
+        case 3:
+            check_insn(ctx, ISA_MIPS32R2);
+            CP0_CHECK(ctx->cmgcr);
+            tcg_gen_ld_tl(arg, cpu_env, offsetof(CPUMIPSState, CP0_CMGCRBase));
+            rn = "CMGCRBase";
+            break;
         default:
             goto cp0_unimplemented;
         }
@@ -19663,6 +19677,7 @@
     ctx.PAMask = env->PAMask;
     ctx.mvh = (env->CP0_Config5 >> CP0C5_MVH) & 1;
     ctx.CP0_LLAddr_shift = env->CP0_LLAddr_shift;
+    ctx.cmgcr = (env->CP0_Config3 >> CP0C3_CMGCR) & 1;
     /* Restore delay slot state from the tb context.  */
     ctx.hflags = (uint32_t)tb->flags; /* FIXME: maybe use 64 bits here? */
     ctx.ulri = (env->CP0_Config3 >> CP0C3_ULRI) & 1;
@@ -20062,6 +20077,9 @@
     } else {
         env->CP0_EBase |= 0x80000000;
     }
+    if (env->CP0_Config3 & (1 << CP0C3_CMGCR)) {
+        env->CP0_CMGCRBase = 0x1fbf8000 >> 4;
+    }
     env->CP0_Status = (1 << CP0St_BEV) | (1 << CP0St_ERL);
     /* vectored interrupts not implemented, timer on int 7,
        no performance counters. */