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Commit 0e243178 authored by Bob Moore's avatar Bob Moore Committed by Len Brown
Browse files

ACPI 5.0: New interface, acpi_buffer_to_resource 



This interface converts an AML buffer to an internal ACPI_RESOURCE.

Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent a91cdde2

drivers/acpi/acpica/rscreate.c

+64 −0
Original line number Diff line number Diff line
@@ -49,6 +49,70 @@ 
#define _COMPONENT          ACPI_RESOURCES

ACPI_MODULE_NAME("rscreate")



/*******************************************************************************

 *

 * FUNCTION:    acpi_buffer_to_resource

 *

 * PARAMETERS:  aml_buffer          - Pointer to the resource byte stream

 *              aml_buffer_length   - Length of the aml_buffer

 *              resource_ptr        - Where the converted resource is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Convert a raw AML buffer to a resource list

 *

 ******************************************************************************/

acpi_status

acpi_buffer_to_resource(u8 *aml_buffer,

			u16 aml_buffer_length,

			struct acpi_resource **resource_ptr)

{

	acpi_status status;

	acpi_size list_size_needed;

	void *resource;

	void *current_resource_ptr;



	/*

	 * Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag

	 * is not required here.

	 */



	/* Get the required length for the converted resource */



	status = acpi_rs_get_list_length(aml_buffer, aml_buffer_length,

					 &list_size_needed);

	if (status == AE_AML_NO_RESOURCE_END_TAG) {

		status = AE_OK;

	}

	if (ACPI_FAILURE(status)) {

		return (status);

	}



	/* Allocate a buffer for the converted resource */



	resource = ACPI_ALLOCATE_ZEROED(list_size_needed);

	current_resource_ptr = resource;

	if (!resource) {

		return (AE_NO_MEMORY);

	}



	/* Perform the AML-to-Resource conversion */



	status = acpi_ut_walk_aml_resources(aml_buffer, aml_buffer_length,

					    acpi_rs_convert_aml_to_resources,

					    &current_resource_ptr);

	if (status == AE_AML_NO_RESOURCE_END_TAG) {

		status = AE_OK;

	}

	if (ACPI_FAILURE(status)) {

		ACPI_FREE(resource);

	} else {

		*resource_ptr = resource;

	}



	return (status);

}



/*******************************************************************************

 *

 * FUNCTION:    acpi_rs_create_resource_list

include/acpi/acpixf.h

+5 −0
Original line number Diff line number Diff line
@@ -376,6 +376,11 @@ acpi_status 
acpi_resource_to_address64(struct acpi_resource *resource,

			   struct acpi_resource_address64 *out);



acpi_status

acpi_buffer_to_resource(u8 *aml_buffer,

			u16 aml_buffer_length,

			struct acpi_resource **resource_ptr);



/*

 * Hardware (ACPI device) interfaces

 */