| Message ID | 1430990964-10528-14-git-send-email-zhaoshenglong@huawei.com |
|---|---|
| State | New |
| Headers | show |
On Thu, 7 May 2015 17:29:15 +0800 Shannon Zhao <zhaoshenglong@huawei.com> wrote: > From: Shannon Zhao <shannon.zhao@linaro.org> > > According to ACPI spec, DefBuffer can take two parameters: BufferSize > and ByteList. Make it consistent with the spec. If we want to request > uninitialized buffer, pass ByteList as NULL to aml_buffer() to > reserve spaces. rephrase to: uninitialized buffer could be requested by passing ByteList as NULL to reserve space. > > Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com> > Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> > --- > hw/acpi/aml-build.c | 15 ++++++++++++++- > include/hw/acpi/aml-build.h | 2 +- > 2 files changed, 15 insertions(+), 2 deletions(-) > > diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c > index b99bb13..a38a536 100644 > --- a/hw/acpi/aml-build.c > +++ b/hw/acpi/aml-build.c > @@ -643,9 +643,22 @@ Aml *aml_resource_template(void) > } > > /* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefBuffer */ > -Aml *aml_buffer(void) > +Aml *aml_buffer(int buffer_size, uint8_t *byte_list) > { > + int i; > Aml *var = aml_bundle(0x11 /* BufferOp */, AML_BUFFER); > + > + for (i = 0; i < buffer_size; i++) { > + /* (byte_list == NULL) means requesting uninitialized buffer, only > + * need to reserve spaces. > + */ ^^^ should be in doc comment above also s/spaces/space/ > + if (byte_list == NULL) { > + build_append_byte(var->buf, 0x0); > + } else { > + build_append_byte(var->buf, *(byte_list + i)); > + } > + } > + > return var; > } > > diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h > index d1b9fe7..69d7813 100644 > --- a/include/hw/acpi/aml-build.h > +++ b/include/hw/acpi/aml-build.h > @@ -255,7 +255,7 @@ Aml *aml_device(const char *name_format, ...) GCC_FMT_ATTR(1, 2); > Aml *aml_method(const char *name, int arg_count); > Aml *aml_if(Aml *predicate); > Aml *aml_package(uint8_t num_elements); > -Aml *aml_buffer(void); > +Aml *aml_buffer(int buffer_size, uint8_t *byte_list); > Aml *aml_resource_template(void); > Aml *aml_field(const char *name, AmlFieldFlags flags); > Aml *aml_varpackage(uint32_t num_elements);
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index b99bb13..a38a536 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -643,9 +643,22 @@ Aml *aml_resource_template(void) } /* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefBuffer */ -Aml *aml_buffer(void) +Aml *aml_buffer(int buffer_size, uint8_t *byte_list) { + int i; Aml *var = aml_bundle(0x11 /* BufferOp */, AML_BUFFER); + + for (i = 0; i < buffer_size; i++) { + /* (byte_list == NULL) means requesting uninitialized buffer, only + * need to reserve spaces. + */ + if (byte_list == NULL) { + build_append_byte(var->buf, 0x0); + } else { + build_append_byte(var->buf, *(byte_list + i)); + } + } + return var; } diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h index d1b9fe7..69d7813 100644 --- a/include/hw/acpi/aml-build.h +++ b/include/hw/acpi/aml-build.h @@ -255,7 +255,7 @@ Aml *aml_device(const char *name_format, ...) GCC_FMT_ATTR(1, 2); Aml *aml_method(const char *name, int arg_count); Aml *aml_if(Aml *predicate); Aml *aml_package(uint8_t num_elements); -Aml *aml_buffer(void); +Aml *aml_buffer(int buffer_size, uint8_t *byte_list); Aml *aml_resource_template(void); Aml *aml_field(const char *name, AmlFieldFlags flags); Aml *aml_varpackage(uint32_t num_elements);