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target/arm: Introduce ARM_FEATURE_M_MAIN

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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 <jusual@mail.ru>
Message-id: 20180622080138.17702-2-jusual@mail.ru
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Julia Suvorova 2018-06-22 13:28:41 +01:00 committed by Peter Maydell
parent 665670aa3a
commit cc2ae7c9de
2 changed files with 4 additions and 0 deletions
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3
target/arm/cpu.c
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@ -1238,6 +1238,7 @@ 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;
@ -1262,6 +1263,7 @@ 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;
@ -1287,6 +1289,7 @@ 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 */

1
target/arm/cpu.h
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@ -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)