47  * The following macros determine a given offset is a COMD field.
49  * 2-byte COMD field at offset 4 and master subspaces (type 3) contains a 4-byte
50  * COMD field starting at offset 12.
60  *                                field access attributes
78 			    "Invalid Field/AccessAs protocol ID: 0x%4.4X",  in acpi_ex_get_protocol_buffer_length()
93  *              obj_desc            - The named field
98  * DESCRIPTION: Read from a named field. Returns either an Integer or a
99  *              Buffer, depending on the size of the field and whether if a
100  *              field is created by the create_field() operator.
137 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
139 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
141 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
151 	 * Allocate a buffer for the contents of the field.  in acpi_ex_read_data_from_field()
153 	 * If the field is larger than the current integer width, create  in acpi_ex_read_data_from_field()
156 	 * field size is equal or smaller than an Integer.  in acpi_ex_read_data_from_field()
161 	 * Note: Field.length is in bits.  in acpi_ex_read_data_from_field()
164 	    (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length);  in acpi_ex_read_data_from_field()
170 		/* Field is too large for an Integer, create a Buffer instead */  in acpi_ex_read_data_from_field()
178 		/* Field will fit within an Integer (normal case) */  in acpi_ex_read_data_from_field()
190 	    (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
198 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
201 		 * Reading from a PCC field unit does not require the handler because  in acpi_ex_read_data_from_field()
206 				  obj_desc->field.bit_length));  in acpi_ex_read_data_from_field()
209 		       obj_desc->field.region_obj->field.internal_pcc_buffer +  in acpi_ex_read_data_from_field()
210 		       obj_desc->field.base_byte_offset,  in acpi_ex_read_data_from_field()
211 		       (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.  in acpi_ex_read_data_from_field()
232 	/* Read from the field */  in acpi_ex_read_data_from_field()
252  *              obj_desc            - The named field
257  * DESCRIPTION: Write to a named field
291 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
299 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
301 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
303 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
313 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
316 		 * According to the spec a write to the COMD field will invoke the  in acpi_ex_write_data_to_field()
319 		 * of the field. This is considered safer because some firmware tools  in acpi_ex_write_data_to_field()
323 		    (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.  in acpi_ex_write_data_to_field()
325 		memcpy(obj_desc->field.region_obj->field.internal_pcc_buffer +  in acpi_ex_write_data_to_field()
326 		       obj_desc->field.base_byte_offset,  in acpi_ex_write_data_to_field()
329 		if ((obj_desc->field.region_obj->region.address ==  in acpi_ex_write_data_to_field()
331 		     && MASTER_SUBSPACE_COMMAND(obj_desc->field.  in acpi_ex_write_data_to_field()
333 		    || GENERIC_SUBSPACE_COMMAND(obj_desc->field.  in acpi_ex_write_data_to_field()
339 					  "PCC COMD field has been written. Invoking PCC handler now.\n"));  in acpi_ex_write_data_to_field()
343 						  (u64 *)obj_desc->field.  in acpi_ex_write_data_to_field()
344 						  region_obj->field.  in acpi_ex_write_data_to_field()
396 	/* Write to the field */  in acpi_ex_write_data_to_field()