target-arm: Convert debug registers to cp_reginfo

Convert the cp14 debug registers (DBGDIDR, DBGDRAR, DBGDSAR) to the
cp_reginfo scheme.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

target-arm/helper.c

@@ -56,6 +56,27 @@ static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
     return 0;
 }
 
+static const ARMCPRegInfo cp_reginfo[] = {
+    /* DBGDIDR: just RAZ. In particular this means the "debug architecture
+     * version" bits will read as a reserved value, which should cause
+     * Linux to not try to use the debug hardware.
+     */
+    { .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
+      .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
+    REGINFO_SENTINEL
+};
+
+static const ARMCPRegInfo v7_cp_reginfo[] = {
+    /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
+     * debug components
+     */
+    { .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
+      .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
+    { .name = "DBGDRAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
+      .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
+    REGINFO_SENTINEL
+};
+
 void register_cp_regs_for_features(ARMCPU *cpu)
 {
     /* Register all the coprocessor registers based on feature bits */
@@ -65,6 +86,10 @@ void register_cp_regs_for_features(ARMCPU *cpu)
         return;
     }
 
+    define_arm_cp_regs(cpu, cp_reginfo);
+    if (arm_feature(env, ARM_FEATURE_V7)) {
+        define_arm_cp_regs(cpu, v7_cp_reginfo);
+    }
 }
 
 ARMCPU *cpu_arm_init(const char *cpu_model)

target-arm/translate.c

@@ -6364,34 +6364,6 @@ static int disas_cp14_read(CPUARMState * env, DisasContext *s, uint32_t insn)
     int rt = (insn >> 12) & 0xf;
     TCGv tmp;
 
-    /* Minimal set of debug registers, since we don't support debug */
-    if (op1 == 0 && crn == 0 && op2 == 0) {
-        switch (crm) {
-        case 0:
-            /* DBGDIDR: just RAZ. In particular this means the
-             * "debug architecture version" bits will read as
-             * a reserved value, which should cause Linux to
-             * not try to use the debug hardware.
-             */
-            tmp = tcg_const_i32(0);
-            store_reg(s, rt, tmp);
-            return 0;
-        case 1:
-        case 2:
-            /* DBGDRAR and DBGDSAR: v7 only. Always RAZ since we
-             * don't implement memory mapped debug components
-             */
-            if (ENABLE_ARCH_7) {
-                tmp = tcg_const_i32(0);
-                store_reg(s, rt, tmp);
-                return 0;
-            }
-            break;
-        default:
-            break;
-        }
-    }
-
     if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
         if (op1 == 6 && crn == 0 && crm == 0 && op2 == 0) {
             /* TEECR */