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[PATCH 1/1] target/arm: Add support for cortex-m7 CPU
From: |
Christophe Lyon |
Subject: |
[PATCH 1/1] target/arm: Add support for cortex-m7 CPU |
Date: |
Fri, 25 Oct 2019 11:08:41 +0200 |
This is derived from cortex-m4 description, adding DP support and FPv5
instructions with the corresponding flags in isar and mvfr2.
Checked that it could successfully execute
vrinta.f32 s15, s15
while cortex-m4 emulation rejects it with "illegal instruction".
Signed-off-by: Christophe Lyon <address@hidden>
---
target/arm/cpu.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 13813fb..ccae849 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1954,6 +1954,37 @@ static void cortex_m4_initfn(Object *obj)
cpu->isar.id_isar6 = 0x00000000;
}
+static void cortex_m7_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);
+ set_feature(&cpu->env, ARM_FEATURE_THUMB_DSP);
+ set_feature(&cpu->env, ARM_FEATURE_VFP4);
+ cpu->midr = 0x411fc272; /* r1p2 */
+ cpu->pmsav7_dregion = 8;
+ cpu->isar.mvfr0 = 0x10110221;
+ cpu->isar.mvfr1 = 0x12000011;
+ cpu->isar.mvfr2 = 0x00000040;
+ cpu->id_pfr0 = 0x00000030;
+ cpu->id_pfr1 = 0x00000200;
+ cpu->id_dfr0 = 0x00100000;
+ cpu->id_afr0 = 0x00000000;
+ cpu->id_mmfr0 = 0x00100030;
+ cpu->id_mmfr1 = 0x00000000;
+ cpu->id_mmfr2 = 0x01000000;
+ cpu->id_mmfr3 = 0x00000000;
+ cpu->isar.id_isar0 = 0x01101110;
+ cpu->isar.id_isar1 = 0x02112000;
+ cpu->isar.id_isar2 = 0x20232231;
+ cpu->isar.id_isar3 = 0x01111131;
+ cpu->isar.id_isar4 = 0x01310132;
+ cpu->isar.id_isar5 = 0x00000000;
+ cpu->isar.id_isar6 = 0x00000000;
+}
+
static void cortex_m33_initfn(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
@@ -2538,6 +2569,8 @@ static const ARMCPUInfo arm_cpus[] = {
.class_init = arm_v7m_class_init },
{ .name = "cortex-m4", .initfn = cortex_m4_initfn,
.class_init = arm_v7m_class_init },
+ { .name = "cortex-m7", .initfn = cortex_m7_initfn,
+ .class_init = arm_v7m_class_init },
{ .name = "cortex-m33", .initfn = cortex_m33_initfn,
.class_init = arm_v7m_class_init },
{ .name = "cortex-r5", .initfn = cortex_r5_initfn },
--
2.7.4
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