diff mbox series

[v2,3/3] target/arm: add "cortex-m0" CPU model

Message ID 20180630091343.14391-4-stefanha@redhat.com
State New
Headers show
Series arm: add skeleton Cortex M0 CPU model | expand

Commit Message

Stefan Hajnoczi June 30, 2018, 9:13 a.m. UTC 
Define a "cortex-m0" ARMv6-M CPU model.

Most of the register reset values set by other CPU models are not
relevant for the cut-down ARMv6-M architecture.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 target/arm/cpu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Peter Maydell July 5, 2018, 3:28 p.m. UTC | #1 
On 30 June 2018 at 10:13, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> Define a "cortex-m0" ARMv6-M CPU model.
>
> Most of the register reset values set by other CPU models are not
> relevant for the cut-down ARMv6-M architecture.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM
diff mbox series

Patch

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 2ae4fffafb..10951fa0eb 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1233,6 +1233,15 @@  static void arm11mpcore_initfn(Object *obj)
     cpu->reset_auxcr = 1;
 }
 
+static void cortex_m0_initfn(Object *obj)
+{
+    ARMCPU *cpu = ARM_CPU(obj);
+    set_feature(&cpu->env, ARM_FEATURE_V6);
+    set_feature(&cpu->env, ARM_FEATURE_M);
+
+    cpu->midr = 0x410cc200;
+}
+
 static void cortex_m3_initfn(Object *obj)
 {
     ARMCPU *cpu = ARM_CPU(obj);
@@ -1825,6 +1834,8 @@  static const ARMCPUInfo arm_cpus[] = {
     { .name = "arm1136",     .initfn = arm1136_initfn },
     { .name = "arm1176",     .initfn = arm1176_initfn },
     { .name = "arm11mpcore", .initfn = arm11mpcore_initfn },
+    { .name = "cortex-m0",   .initfn = cortex_m0_initfn,
+                             .class_init = arm_v7m_class_init },
     { .name = "cortex-m3",   .initfn = cortex_m3_initfn,
                              .class_init = arm_v7m_class_init },
     { .name = "cortex-m4",   .initfn = cortex_m4_initfn,