[Qemu-devel] [PATCH 11/33] target-arm: Convert TLS registers

[Peter Maydell <peter.maydell@linaro.org>]

Convert TLS registers to the new cp15 framework

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target-arm/helper.c    |   19 +++++++++++++++
 target-arm/translate.c |   58 ------------------------------------------------
 2 files changed, 19 insertions(+), 58 deletions(-)

diff --git a/target-arm/helper.c b/target-arm/helper.c
index c7addea..d4c8a1c 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -154,6 +154,22 @@ static const ARMCPRegInfo t2ee_cp_reginfo[] = {
     REGINFO_SENTINEL
 };
 
+static const ARMCPRegInfo v6k_cp_reginfo[] = {
+    { .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
+      .access = PL0_RW,
+      .fieldoffset = offsetof(CPUARMState, cp15.c13_tls1),
+      .resetvalue = 0 },
+    { .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
+      .access = PL0_R|PL1_W,
+      .fieldoffset = offsetof(CPUARMState, cp15.c13_tls2),
+      .resetvalue = 0 },
+    { .name = "TPIDRPRW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 4,
+      .access = PL1_RW,
+      .fieldoffset = offsetof(CPUARMState, cp15.c13_tls3),
+      .resetvalue = 0 },
+    REGINFO_SENTINEL
+};
+
 void register_cp_regs_for_features(ARMCPU *cpu)
 {
     /* Register all the coprocessor registers based on feature bits */
@@ -169,6 +185,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
     } else {
         define_arm_cp_regs(cpu, not_v6_cp_reginfo);
     }
+    if (arm_feature(env, ARM_FEATURE_V6K)) {
+        define_arm_cp_regs(cpu, v6k_cp_reginfo);
+    }
     if (arm_feature(env, ARM_FEATURE_V7)) {
         define_arm_cp_regs(cpu, v7_cp_reginfo);
     } else {
diff --git a/target-arm/translate.c b/target-arm/translate.c
index a4429ea..e6b0d87 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -2460,64 +2460,9 @@ static int cp15_user_ok(CPUARMState *env, uint32_t insn)
         }
         return 0;
     }
-
-    if (cpn == 13 && cpm == 0) {
-        /* TLS register.  */
-        if (op == 2 || (op == 3 && (insn & ARM_CP_RW_BIT)))
-            return 1;
-    }
     return 0;
 }
 
-static int cp15_tls_load_store(CPUARMState *env, DisasContext *s, uint32_t insn, uint32_t rd)
-{
-    TCGv tmp;
-    int cpn = (insn >> 16) & 0xf;
-    int cpm = insn & 0xf;
-    int op = ((insn >> 5) & 7) | ((insn >> 18) & 0x38);
-
-    if (!arm_feature(env, ARM_FEATURE_V6K))
-        return 0;
-
-    if (!(cpn == 13 && cpm == 0))
-        return 0;
-
-    if (insn & ARM_CP_RW_BIT) {
-        switch (op) {
-        case 2:
-            tmp = load_cpu_field(cp15.c13_tls1);
-            break;
-        case 3:
-            tmp = load_cpu_field(cp15.c13_tls2);
-            break;
-        case 4:
-            tmp = load_cpu_field(cp15.c13_tls3);
-            break;
-        default:
-            return 0;
-        }
-        store_reg(s, rd, tmp);
-
-    } else {
-        tmp = load_reg(s, rd);
-        switch (op) {
-        case 2:
-            store_cpu_field(tmp, cp15.c13_tls1);
-            break;
-        case 3:
-            store_cpu_field(tmp, cp15.c13_tls2);
-            break;
-        case 4:
-            store_cpu_field(tmp, cp15.c13_tls3);
-            break;
-        default:
-            tcg_temp_free_i32(tmp);
-            return 0;
-        }
-    }
-    return 1;
-}
-
 /* Disassemble system coprocessor (cp15) instruction.  Return nonzero if
    instruction is not defined.  */
 static int disas_cp15_insn(CPUARMState *env, DisasContext *s, uint32_t insn)
@@ -2548,9 +2493,6 @@ static int disas_cp15_insn(CPUARMState *env, DisasContext *s, uint32_t insn)
 
     rd = (insn >> 12) & 0xf;
 
-    if (cp15_tls_load_store(env, s, insn, rd))
-        return 0;
-
     tmp2 = tcg_const_i32(insn);
     if (insn & ARM_CP_RW_BIT) {
         tmp = tcg_temp_new_i32();
-- 
1.7.1