[PATCH v4 19/33] target/nios2: Implement CR_STATUS.RSIE

[Richard Henderson]

Without EIC, this bit is RES1.  So set the bit at reset,
and add it to the readonly fields of CR_STATUS.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/nios2/cpu.h | 1 +
 target/nios2/cpu.c | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/target/nios2/cpu.h b/target/nios2/cpu.h
index 7faec97d77..b418deec4c 100644
--- a/target/nios2/cpu.h
+++ b/target/nios2/cpu.h
@@ -108,6 +108,7 @@ FIELD(CR_STATUS, IL, 4, 6)
 FIELD(CR_STATUS, CRS, 10, 6)
 FIELD(CR_STATUS, PRS, 16, 6)
 FIELD(CR_STATUS, NMI, 22, 1)
+FIELD(CR_STATUS, RSIE, 23, 1)
 
 #define CR_STATUS_PIE  (1u << R_CR_STATUS_PIE_SHIFT)
 #define CR_STATUS_U    (1u << R_CR_STATUS_U_SHIFT)
diff --git a/target/nios2/cpu.c b/target/nios2/cpu.c
index fbcb4da737..ed7b9f9459 100644
--- a/target/nios2/cpu.c
+++ b/target/nios2/cpu.c
@@ -59,9 +59,9 @@ static void nios2_cpu_reset(DeviceState *dev)
 
 #if defined(CONFIG_USER_ONLY)
     /* Start in user mode with interrupts enabled. */
-    env->status = CR_STATUS_U | CR_STATUS_PIE;
+    env->status = CR_STATUS_RSIE | CR_STATUS_U | CR_STATUS_PIE;
 #else
-    env->status = 0;
+    env->status = CR_STATUS_RSIE;
 #endif
 }
 
@@ -109,6 +109,7 @@ static void nios2_cpu_initfn(Object *obj)
     WR_REG(CR_BADADDR);
 
     /* TODO: These control registers are not present with the EIC. */
+    RO_FIELD(CR_STATUS, RSIE);
     WR_REG(CR_IENABLE);
     RO_REG(CR_IPENDING);
 
-- 
2.25.1