target/nios2: Use env_cpu, env_archcpu

Cleanup in the boilerplate that each target must define.
Replace nios2_env_get_cpu with env_archcpu.  The combination
CPU(nios2_env_get_cpu) should have used ENV_GET_CPU to begin;
use env_cpu now.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

hw/nios2/cpu_pic.c

@@ -54,12 +54,9 @@ static void nios2_pic_cpu_handler(void *opaque, int irq, int level)
 
 void nios2_check_interrupts(CPUNios2State *env)
 {
-    Nios2CPU *cpu = nios2_env_get_cpu(env);
-    CPUState *cs = CPU(cpu);
-
     if (env->irq_pending) {
         env->irq_pending = 0;
-        cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+        cpu_interrupt(env_cpu(env), CPU_INTERRUPT_HARD);
     }
 }
 

target/nios2/cpu.h

@@ -194,11 +194,6 @@ typedef struct Nios2CPU {
     uint32_t fast_tlb_miss_addr;
 } Nios2CPU;
 
-static inline Nios2CPU *nios2_env_get_cpu(CPUNios2State *env)
-{
-    return NIOS2_CPU(container_of(env, Nios2CPU, env));
-}
-
 #define ENV_OFFSET offsetof(Nios2CPU, env)
 
 void nios2_tcg_init(void);

target/nios2/mmu.c

@@ -61,7 +61,7 @@ unsigned int mmu_translate(CPUNios2State *env,
                            Nios2MMULookup *lu,
                            target_ulong vaddr, int rw, int mmu_idx)
 {
-    Nios2CPU *cpu = nios2_env_get_cpu(env);
+    Nios2CPU *cpu = env_archcpu(env);
     int pid = (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4;
     int vpn = vaddr >> 12;
 
@@ -103,7 +103,7 @@ unsigned int mmu_translate(CPUNios2State *env,
 static void mmu_flush_pid(CPUNios2State *env, uint32_t pid)
 {
     CPUState *cs = env_cpu(env);
-    Nios2CPU *cpu = nios2_env_get_cpu(env);
+    Nios2CPU *cpu = env_archcpu(env);
     int idx;
     MMU_LOG(qemu_log("TLB Flush PID %d\n", pid));
 
@@ -127,7 +127,7 @@ static void mmu_flush_pid(CPUNios2State *env, uint32_t pid)
 void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
 {
     CPUState *cs = env_cpu(env);
-    Nios2CPU *cpu = nios2_env_get_cpu(env);
+    Nios2CPU *cpu = env_archcpu(env);
 
     MMU_LOG(qemu_log("mmu_write %08X = %08X\n", rn, v));
 
@@ -244,7 +244,7 @@ void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
 
 void mmu_init(CPUNios2State *env)
 {
-    Nios2CPU *cpu = nios2_env_get_cpu(env);
+    Nios2CPU *cpu = env_archcpu(env);
     Nios2MMU *mmu = &env->mmu;
 
     MMU_LOG(qemu_log("mmu_init\n"));
@@ -255,7 +255,7 @@ void mmu_init(CPUNios2State *env)
 
 void dump_mmu(CPUNios2State *env)
 {
-    Nios2CPU *cpu = nios2_env_get_cpu(env);
+    Nios2CPU *cpu = env_archcpu(env);
     int i;
 
     qemu_printf("MMU: ways %d, entries %d, pid bits %d\n",