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acpi: add aml_create_field()

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It will be used by nvdimm acpi

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xiao Guangrong 2016-03-01 18:56:03 +08:00 committed by Michael S. Tsirkin
parent a648c13738
commit 39b6dbd8d7
2 changed files with 16 additions and 0 deletions
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14
hw/acpi/aml-build.c
View File

@ -997,6 +997,20 @@ Aml *create_field_common(int opcode, Aml *srcbuf, Aml *index, const char *name)
return var;
}
/* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: DefCreateField */
Aml *aml_create_field(Aml *srcbuf, Aml *bit_index, Aml *num_bits,
const char *name)
{
Aml *var = aml_alloc();
build_append_byte(var->buf, 0x5B); /* ExtOpPrefix */
build_append_byte(var->buf, 0x13); /* CreateFieldOp */
aml_append(var, srcbuf);
aml_append(var, bit_index);
aml_append(var, num_bits);
build_append_namestring(var->buf, "%s", name);
return var;
}
/* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: DefCreateDWordField */
Aml *aml_create_dword_field(Aml *srcbuf, Aml *index, const char *name)
{

2
include/hw/acpi/aml-build.h
View File

@ -344,6 +344,8 @@ Aml *aml_mutex(const char *name, uint8_t sync_level);
Aml *aml_acquire(Aml *mutex, uint16_t timeout);
Aml *aml_release(Aml *mutex);
Aml *aml_alias(const char *source_object, const char *alias_object);
Aml *aml_create_field(Aml *srcbuf, Aml *bit_index, Aml *num_bits,
const char *name);
Aml *aml_create_dword_field(Aml *srcbuf, Aml *index, const char *name);
Aml *aml_create_qword_field(Aml *srcbuf, Aml *index, const char *name);
Aml *aml_varpackage(uint32_t num_elements);