target/nios2: Move nios2_check_interrupts() into target/nios2

The function nios2_check_interrupts)() looks only at CPU-internal
state; it belongs in target/nios2, not hw/nios2.  Move it into the
same file as its only caller, so it can just be local to that file.

This removes the only remaining code from cpu_pic.c, so we can delete
that file entirely.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20201129174022.26530-3-peter.maydell@linaro.org
Reviewed-by: Wentong Wu <wentong.wu@intel.com>
Tested-by: Wentong Wu <wentong.wu@intel.com>

2 files changed, 9 insertions, 2 deletions

diff --git a/target/nios2/cpu.h b/target/nios2/cpu.h
index b7efb54ba7..2ab82fdc71 100644
--- a/target/nios2/cpu.h
+++ b/target/nios2/cpu.h
@@ -201,8 +201,6 @@ void nios2_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
                                    MMUAccessType access_type,
                                    int mmu_idx, uintptr_t retaddr);
 
-void nios2_check_interrupts(CPUNios2State *env);
-
 void do_nios2_semihosting(CPUNios2State *env);
 
 #define CPU_RESOLVING_TYPE TYPE_NIOS2_CPU
diff --git a/target/nios2/op_helper.c b/target/nios2/op_helper.c
index a60730faac..a59003855a 100644
--- a/target/nios2/op_helper.c
+++ b/target/nios2/op_helper.c
@@ -36,6 +36,15 @@ void helper_mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
     mmu_write(env, rn, v);
 }
 
+static void nios2_check_interrupts(CPUNios2State *env)
+{
+    if (env->irq_pending &&
+        (env->regs[CR_STATUS] & CR_STATUS_PIE)) {
+        env->irq_pending = 0;
+        cpu_interrupt(env_cpu(env), CPU_INTERRUPT_HARD);
+    }
+}
+
 void helper_check_interrupts(CPUNios2State *env)
 {
     qemu_mutex_lock_iothread();