From 1fb877a467014ec5a31cac63b067a38c13c684f0 Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 25 Feb 2022 18:49:29 -1000
Subject: [PATCH] target/nios2: Remove mmu_read_debug

This functionality can be had via plugins, if desired.
In the meantime, it is unused code.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/nios2/helper.h    |  1 -
 target/nios2/mmu.c       | 20 --------------------
 target/nios2/mmu.h       |  1 -
 target/nios2/op_helper.c |  5 -----
 target/nios2/translate.c | 17 -----------------
 5 files changed, 44 deletions(-)

diff --git a/target/nios2/helper.h b/target/nios2/helper.h
index 6c8f0b5b35..6d8eec1814 100644
--- a/target/nios2/helper.h
+++ b/target/nios2/helper.h
@@ -21,7 +21,6 @@
 DEF_HELPER_FLAGS_2(raise_exception, TCG_CALL_NO_WG, noreturn, env, i32)
 
 #if !defined(CONFIG_USER_ONLY)
-DEF_HELPER_2(mmu_read_debug, void, env, i32)
 DEF_HELPER_3(mmu_write, void, env, i32, i32)
 DEF_HELPER_1(check_interrupts, void, env)
 #endif
diff --git a/target/nios2/mmu.c b/target/nios2/mmu.c
index 2545c06761..5616c39d54 100644
--- a/target/nios2/mmu.c
+++ b/target/nios2/mmu.c
@@ -35,26 +35,6 @@
 #define MMU_LOG(x)
 #endif
 
-void mmu_read_debug(CPUNios2State *env, uint32_t rn)
-{
-    switch (rn) {
-    case CR_TLBACC:
-        MMU_LOG(qemu_log("TLBACC READ %08X\n", env->regs[rn]));
-        break;
-
-    case CR_TLBMISC:
-        MMU_LOG(qemu_log("TLBMISC READ %08X\n", env->regs[rn]));
-        break;
-
-    case CR_PTEADDR:
-        MMU_LOG(qemu_log("PTEADDR READ %08X\n", env->regs[rn]));
-        break;
-
-    default:
-        break;
-    }
-}
-
 /* rw - 0 = read, 1 = write, 2 = fetch.  */
 unsigned int mmu_translate(CPUNios2State *env,
                            Nios2MMULookup *lu,
diff --git a/target/nios2/mmu.h b/target/nios2/mmu.h
index 4f46fbb82e..b7785b46c0 100644
--- a/target/nios2/mmu.h
+++ b/target/nios2/mmu.h
@@ -44,7 +44,6 @@ void mmu_flip_um(CPUNios2State *env, unsigned int um);
 unsigned int mmu_translate(CPUNios2State *env,
                            Nios2MMULookup *lu,
                            target_ulong vaddr, int rw, int mmu_idx);
-void mmu_read_debug(CPUNios2State *env, uint32_t rn);
 void mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v);
 void mmu_init(CPUNios2State *env);
 
diff --git a/target/nios2/op_helper.c b/target/nios2/op_helper.c
index a59003855a..61fc4dc903 100644
--- a/target/nios2/op_helper.c
+++ b/target/nios2/op_helper.c
@@ -26,11 +26,6 @@
 #include "qemu/main-loop.h"
 
 #if !defined(CONFIG_USER_ONLY)
-void helper_mmu_read_debug(CPUNios2State *env, uint32_t rn)
-{
-    mmu_read_debug(env, rn);
-}
-
 void helper_mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
 {
     mmu_write(env, rn, v);
diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index f9abc2fdd2..194c8ebafd 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -448,23 +448,6 @@ static void rdctl(DisasContext *dc, uint32_t code, uint32_t flags)
     gen_check_supervisor(dc);
 
     switch (instr.imm5 + CR_BASE) {
-    case CR_PTEADDR:
-    case CR_TLBACC:
-    case CR_TLBMISC:
-    {
-#if !defined(CONFIG_USER_ONLY)
-        if (likely(instr.c != R_ZERO)) {
-            tcg_gen_mov_tl(cpu_R[instr.c], cpu_R[instr.imm5 + CR_BASE]);
-#ifdef DEBUG_MMU
-            TCGv_i32 tmp = tcg_const_i32(instr.imm5 + CR_BASE);
-            gen_helper_mmu_read_debug(cpu_R[instr.c], cpu_env, tmp);
-            tcg_temp_free_i32(tmp);
-#endif
-        }
-#endif
-        break;
-    }
-
     default:
         if (likely(instr.c != R_ZERO)) {
             tcg_gen_mov_tl(cpu_R[instr.c], cpu_R[instr.imm5 + CR_BASE]);