target/openrisc: Move VR, UPR, DMMCFGR, IMMCFGR to cpu init

These registers are read-only and implementation specific. Initiailize VR for the first time; take the OR1200 values from the verilog source. Note that moving fields within CPUOpenRISCState does not affect migration. Reviewed-by: Stafford Horne <shorne@gmail.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
qemu · Sep 4, 2019 · c7efab4 · c7efab4
1 parent b72e3ff
commit c7efab4
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Showing 3 changed files with 22 additions and 13 deletions.
diff --git a/target/openrisc/cpu.c b/target/openrisc/cpu.c
@@ -56,13 +56,6 @@ static void openrisc_cpu_reset(CPUState *s)
     cpu->env.lock_addr = -1;
     s->exception_index = -1;
 
-    cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP |
-                   UPR_PMP;
-    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;
     cpu->env.picsr = 0x00000000;
@@ -117,15 +110,31 @@ static void or1200_initfn(Object *obj)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 
+    cpu->env.vr = 0x13000008;
+    cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
     cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_OF32S |
                        CPUCFGR_EVBARP;
+
+    /* 1Way, TLB_SIZE entries.  */
+    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));
 }
 
 static void openrisc_any_initfn(Object *obj)
 {
     OpenRISCCPU *cpu = OPENRISC_CPU(obj);
 
+    cpu->env.vr = 0x13000000;
+    cpu->env.upr = UPR_UP | UPR_DMP | UPR_IMP | UPR_PICP | UPR_TTP | UPR_PMP;
     cpu->env.cpucfgr = CPUCFGR_NSGF | CPUCFGR_OB32S | CPUCFGR_EVBARP;
+
+    /* 1Way, TLB_SIZE entries.  */
+    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));
 }
 
 static void openrisc_cpu_class_init(ObjectClass *oc, void *data)

diff --git a/target/openrisc/cpu.h b/target/openrisc/cpu.h
@@ -260,10 +260,6 @@ typedef struct CPUOpenRISCState {
     target_ulong sr_cy;       /* the SR_CY bit, values 0, 1.  */
     target_long  sr_ov;       /* the SR_OV bit (in the sign bit only) */
     uint32_t sr;              /* Supervisor register, without SR_{F,CY,OV} */
-    uint32_t vr;              /* Version register */
-    uint32_t upr;             /* Unit presence register */
-    uint32_t dmmucfgr;        /* DMMU configure register */
-    uint32_t immucfgr;        /* IMMU configure register */
     uint32_t esr;             /* Exception supervisor register */
     uint32_t evbar;           /* Exception vector base address register */
     uint32_t pmr;             /* Power Management Register */
@@ -283,7 +279,11 @@ typedef struct CPUOpenRISCState {
     struct {} end_reset_fields;
 
     /* Fields from here on are preserved across CPU reset. */
+    uint32_t vr;              /* Version register */
+    uint32_t upr;             /* Unit presence register */
     uint32_t cpucfgr;         /* CPU configure register */
+    uint32_t dmmucfgr;        /* DMMU configure register */
+    uint32_t immucfgr;        /* IMMU configure register */
 
 #ifndef CONFIG_USER_ONLY
     QEMUTimer *timer;

diff --git a/target/openrisc/sys_helper.c b/target/openrisc/sys_helper.c
@@ -199,13 +199,13 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env, target_ulong rd,
         return env->vr;
 
     case TO_SPR(0, 1): /* UPR */
-        return env->upr;    /* TT, DM, IM, UP present */
+        return env->upr;
 
     case TO_SPR(0, 2): /* CPUCFGR */
         return env->cpucfgr;
 
     case TO_SPR(0, 3): /* DMMUCFGR */
-        return env->dmmucfgr;    /* 1Way, 64 entries */
+        return env->dmmucfgr;
 
     case TO_SPR(0, 4): /* IMMUCFGR */
         return env->immucfgr;