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[v4,2/6] target/arm: add "cortex-m0" CPU model

Message ID 20180803144721.17036-3-stefanha@redhat.com
State New
Headers show
Series arm: add Cortex M0 CPU model and hex file loader | expand

Commit Message

Stefan Hajnoczi Aug. 3, 2018, 2:47 p.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>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Philippe Mathieu-Daudé Aug. 10, 2018, 3:38 a.m. UTC | #1 
On 08/03/2018 11:47 AM, Stefan Hajnoczi 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>

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> ---
>  target/arm/cpu.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/target/arm/cpu.c b/target/arm/cpu.c
> index 3848ef46aa..7e477c0d23 100644
> --- a/target/arm/cpu.c
> +++ b/target/arm/cpu.c
> @@ -1255,6 +1255,15 @@ 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);
> @@ -1845,6 +1854,8 @@ 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,
>
diff mbox series

Patch

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 3848ef46aa..7e477c0d23 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1255,6 +1255,15 @@  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);
@@ -1845,6 +1854,8 @@  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,