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()
143 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
145 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
155 	 * Allocate a buffer for the contents of the field.  in acpi_ex_read_data_from_field()
157 	 * If the field is larger than the current integer width, create  in acpi_ex_read_data_from_field()
160 	 * field size is equal or smaller than an Integer.  in acpi_ex_read_data_from_field()
165 	 * Note: Field.length is in bits.  in acpi_ex_read_data_from_field()
168 	    (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.bit_length);  in acpi_ex_read_data_from_field()
174 		/* Field is too large for an Integer, create a Buffer instead */  in acpi_ex_read_data_from_field()
182 		/* Field will fit within an Integer (normal case) */  in acpi_ex_read_data_from_field()
194 	    (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
202 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_read_data_from_field()
205 		 * Reading from a PCC field unit does not require the handler because  in acpi_ex_read_data_from_field()
210 				  obj_desc->field.bit_length));  in acpi_ex_read_data_from_field()
213 		       obj_desc->field.region_obj->field.internal_pcc_buffer +  in acpi_ex_read_data_from_field()
214 		       obj_desc->field.base_byte_offset,  in acpi_ex_read_data_from_field()
215 		       (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.  in acpi_ex_read_data_from_field()
236 	/* Read from the field */  in acpi_ex_read_data_from_field()
256  *              obj_desc            - The named field
261  * DESCRIPTION: Write to a named field
295 		   (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()
305 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
307 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
309 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
311 		    || obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
321 		   (obj_desc->field.region_obj->region.space_id ==  in acpi_ex_write_data_to_field()
324 		 * According to the spec a write to the COMD field will invoke the  in acpi_ex_write_data_to_field()
327 		 * of the field. This is considered safer because some firmware tools  in acpi_ex_write_data_to_field()
331 		    (acpi_size)ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->field.  in acpi_ex_write_data_to_field()
333 		memcpy(obj_desc->field.region_obj->field.internal_pcc_buffer +  in acpi_ex_write_data_to_field()
334 		       obj_desc->field.base_byte_offset,  in acpi_ex_write_data_to_field()
337 		if (MASTER_SUBSPACE_COMMAND(obj_desc->field.base_byte_offset)) {  in acpi_ex_write_data_to_field()
342 					  "PCC COMD field has been written. Invoking PCC handler now.\n"));  in acpi_ex_write_data_to_field()
346 						  (u64 *)obj_desc->field.  in acpi_ex_write_data_to_field()
347 						  region_obj->field.  in acpi_ex_write_data_to_field()
399 	/* Write to the field */  in acpi_ex_write_data_to_field()