target/mips: Update ITU to utilize SAARI and SAAR CP0 registers

Update ITU to utilize SAARI and SAAR CP0 registers.

Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index 185702d1e9..48e86d1ad4 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -326,6 +326,7 @@ struct TCState {
 
 };
 
+struct MIPSITUState;
 typedef struct CPUMIPSState CPUMIPSState;
 struct CPUMIPSState {
     TCState active_tc;
@@ -917,6 +918,7 @@ struct CPUMIPSState {
     const mips_def_t *cpu_model;
     void *irq[8];
     QEMUTimer *timer; /* Internal timer */
+    struct MIPSITUState *itu;
     MemoryRegion *itc_tag; /* ITC Configuration Tags */
     target_ulong exception_base; /* ExceptionBase input to the core */
 };
@@ -1059,6 +1061,9 @@ void cpu_set_exception_base(int vp_index, target_ulong address);
 /* mips_int.c */
 void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level);
 
+/* mips_itu.c */
+void itc_reconfigure(struct MIPSITUState *tag);
+
 /* helper.c */
 target_ulong exception_resume_pc (CPUMIPSState *env);
 
diff --git a/target/mips/op_helper.c b/target/mips/op_helper.c
index 409c1365c0..aebad24ed6 100644
--- a/target/mips/op_helper.c
+++ b/target/mips/op_helper.c
@@ -1635,6 +1635,13 @@ void helper_mtc0_saar(CPUMIPSState *env, target_ulong arg1)
     uint32_t target = env->CP0_SAARI & 0x3f;
     if (target < 2) {
         env->CP0_SAAR[target] = arg1 & 0x00000ffffffff03fULL;
+        switch (target) {
+        case 0:
+            if (env->itu) {
+                itc_reconfigure(env->itu);
+            }
+            break;
+        }
     }
 }
 
@@ -1645,6 +1652,13 @@ void helper_mthc0_saar(CPUMIPSState *env, target_ulong arg1)
         env->CP0_SAAR[target] =
             (((uint64_t) arg1 << 32) & 0x00000fff00000000ULL) |
             (env->CP0_SAAR[target] & 0x00000000ffffffffULL);
+        switch (target) {
+        case 0:
+            if (env->itu) {
+                itc_reconfigure(env->itu);
+            }
+            break;
+        }
     }
 }