[v2,1/2] target/arm: Introduce ARM_FEATURE_M_MAIN

Commit Message

Denis V. Lunev" via June 22, 2018, 8:01 a.m. UTC

This feature is intended to distinguish ARMv8-M variants: Baseline and
Mainline. ARMv7-M compatibility requires the Main Extension. ARMv6-M
compatibility is provided by all ARMv8-M implementations.

Signed-off-by: Julia Suvorova <[e-mail]>
---
 target/arm/cpu.c | 3 +++
 target/arm/cpu.h | 1 +
 2 files changed, 4 insertions(+)

Patch

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 788883073c..c8bba94b06 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1248,6 +1248,7 @@  static void cortex_m3_initfn(Object *obj)
     ARMCPU *cpu = ARM_CPU(obj);
     set_feature(&cpu->env, ARM_FEATURE_V7);
     set_feature(&cpu->env, ARM_FEATURE_M);
+    set_feature(&cpu->env, ARM_FEATURE_M_MAIN);
     cpu->midr = 0x410fc231;
     cpu->pmsav7_dregion = 8;
     cpu->id_pfr0 = 0x00000030;
@@ -1272,6 +1273,7 @@  static void cortex_m4_initfn(Object *obj)
 
     set_feature(&cpu->env, ARM_FEATURE_V7);
     set_feature(&cpu->env, ARM_FEATURE_M);
+    set_feature(&cpu->env, ARM_FEATURE_M_MAIN);
     set_feature(&cpu->env, ARM_FEATURE_THUMB_DSP);
     cpu->midr = 0x410fc240; /* r0p0 */
     cpu->pmsav7_dregion = 8;
@@ -1297,6 +1299,7 @@  static void cortex_m33_initfn(Object *obj)
 
     set_feature(&cpu->env, ARM_FEATURE_V8);
     set_feature(&cpu->env, ARM_FEATURE_M);
+    set_feature(&cpu->env, ARM_FEATURE_M_MAIN);
     set_feature(&cpu->env, ARM_FEATURE_M_SECURITY);
     set_feature(&cpu->env, ARM_FEATURE_THUMB_DSP);
     cpu->midr = 0x410fd213; /* r0p3 */
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 8488273c5b..a4507a2d6f 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1482,6 +1482,7 @@  enum arm_features {
     ARM_FEATURE_V8_RDM, /* implements v8.1 simd round multiply */
     ARM_FEATURE_V8_FP16, /* implements v8.2 half-precision float */
     ARM_FEATURE_V8_FCMA, /* has complex number part of v8.3 extensions.  */
+    ARM_FEATURE_M_MAIN, /* M profile Main Extension */
 };
 
 static inline int arm_feature(CPUARMState *env, int feature)