[v2,05/18] acpi: add aml_create_field

Implement CreateField term which are used by NVDIMM _DSM method in later patch

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
---
 hw/acpi/aml-build.c         | 14 ++++++++++++++
 include/hw/acpi/aml-build.h |  1 +
 2 files changed, 15 insertions(+)

On Fri, 14 Aug 2015 22:51:58 +0800
Xiao Guangrong <guangrong.xiao@linux.intel.com> wrote:

> Implement CreateField term which are used by NVDIMM _DSM method in later patch
> 
> Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
> ---
>  hw/acpi/aml-build.c         | 14 ++++++++++++++
>  include/hw/acpi/aml-build.h |  1 +
>  2 files changed, 15 insertions(+)
> 
> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> index a526eed..debdad2 100644
> --- a/hw/acpi/aml-build.c
> +++ b/hw/acpi/aml-build.c
> @@ -1151,6 +1151,20 @@ Aml *aml_sizeof(Aml *arg)
>      return var;
>  }
>  
> +/* ACPI 6.0: 20.2.5.2 Named Objects Encoding: DefCreateField */
ditto, refer to to the first revision where it's appeared

> +Aml *aml_create_field(Aml *srcbuf, Aml *index, Aml *len, const char *name)
index and len could be only of 'Integer' type, so there is no point
to pass them in as Aml, just use uintFOO_t here and convert
them to aml_int() internally. That way call sites will be smaller
and have less chance to pass a wrong Aml variable. 

> +{
> +    Aml *var = aml_alloc();
> +
drop newline

> +    build_append_byte(var->buf, 0x5B); /* ExtOpPrefix */
> +    build_append_byte(var->buf, 0x13); /* CreateFieldOp */
> +    aml_append(var, srcbuf);
> +    aml_append(var, index);
> +    aml_append(var, len);
> +    build_append_namestring(var->buf, "%s", name);
> +    return var;
> +}
> +
>  void
>  build_header(GArray *linker, GArray *table_data,
>               AcpiTableHeader *h, const char *sig, int len, uint8_t rev)
> diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> index 6b591ab..d4dbd44 100644
> --- a/include/hw/acpi/aml-build.h
> +++ b/include/hw/acpi/aml-build.h
> @@ -277,6 +277,7 @@ Aml *aml_touuid(const char *uuid);
>  Aml *aml_unicode(const char *str);
>  Aml *aml_derefof(Aml *arg);
>  Aml *aml_sizeof(Aml *arg);
> +Aml *aml_create_field(Aml *srcbuf, Aml *index, Aml *len, const char *name);
>  
>  void
>  build_header(GArray *linker, GArray *table_data,

On 09/02/2015 07:10 PM, Igor Mammedov wrote:
> On Fri, 14 Aug 2015 22:51:58 +0800
> Xiao Guangrong <guangrong.xiao@linux.intel.com> wrote:
>
>> Implement CreateField term which are used by NVDIMM _DSM method in later patch
>>
>> Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
>> ---
>>   hw/acpi/aml-build.c         | 14 ++++++++++++++
>>   include/hw/acpi/aml-build.h |  1 +
>>   2 files changed, 15 insertions(+)
>>
>> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
>> index a526eed..debdad2 100644
>> --- a/hw/acpi/aml-build.c
>> +++ b/hw/acpi/aml-build.c
>> @@ -1151,6 +1151,20 @@ Aml *aml_sizeof(Aml *arg)
>>       return var;
>>   }
>>
>> +/* ACPI 6.0: 20.2.5.2 Named Objects Encoding: DefCreateField */
> ditto, refer to to the first revision where it's appeared

Well do it.

>
>> +Aml *aml_create_field(Aml *srcbuf, Aml *index, Aml *len, const char *name)
> index and len could be only of 'Integer' type, so there is no point
> to pass them in as Aml, just use uintFOO_t here and convert
> them to aml_int() internally. That way call sites will be smaller
> and have less chance to pass a wrong Aml variable.
>

Good idea.

BTW, Igor, sorry for the delay reply since we got a holiday in this week.