diff options
Diffstat (limited to 'drivers/acpi/executer/exprep.c')
| -rw-r--r-- | drivers/acpi/executer/exprep.c | 381 |
1 files changed, 185 insertions, 196 deletions
diff --git a/drivers/acpi/executer/exprep.c b/drivers/acpi/executer/exprep.c index c9e3c68b5549..7476c363e407 100644 --- a/drivers/acpi/executer/exprep.c +++ b/drivers/acpi/executer/exprep.c @@ -42,32 +42,24 @@ * POSSIBILITY OF SUCH DAMAGES. */ - #include <acpi/acpi.h> #include <acpi/acinterp.h> #include <acpi/amlcode.h> #include <acpi/acnamesp.h> - #define _COMPONENT ACPI_EXECUTER - ACPI_MODULE_NAME ("exprep") +ACPI_MODULE_NAME("exprep") /* Local prototypes */ - static u32 -acpi_ex_decode_field_access ( - union acpi_operand_object *obj_desc, - u8 field_flags, - u32 *return_byte_alignment); - +acpi_ex_decode_field_access(union acpi_operand_object *obj_desc, + u8 field_flags, u32 * return_byte_alignment); #ifdef ACPI_UNDER_DEVELOPMENT static u32 -acpi_ex_generate_access ( - u32 field_bit_offset, - u32 field_bit_length, - u32 region_length); +acpi_ex_generate_access(u32 field_bit_offset, + u32 field_bit_length, u32 region_length); /******************************************************************************* * @@ -92,39 +84,36 @@ acpi_ex_generate_access ( ******************************************************************************/ static u32 -acpi_ex_generate_access ( - u32 field_bit_offset, - u32 field_bit_length, - u32 region_length) +acpi_ex_generate_access(u32 field_bit_offset, + u32 field_bit_length, u32 region_length) { - u32 field_byte_length; - u32 field_byte_offset; - u32 field_byte_end_offset; - u32 access_byte_width; - u32 field_start_offset; - u32 field_end_offset; - u32 minimum_access_width = 0xFFFFFFFF; - u32 minimum_accesses = 0xFFFFFFFF; - u32 accesses; - - - ACPI_FUNCTION_TRACE ("ex_generate_access"); - + u32 field_byte_length; + u32 field_byte_offset; + u32 field_byte_end_offset; + u32 access_byte_width; + u32 field_start_offset; + u32 field_end_offset; + u32 minimum_access_width = 0xFFFFFFFF; + u32 minimum_accesses = 0xFFFFFFFF; + u32 accesses; + + ACPI_FUNCTION_TRACE("ex_generate_access"); /* Round Field start offset and length to "minimal" byte boundaries */ - field_byte_offset = ACPI_DIV_8 (ACPI_ROUND_DOWN (field_bit_offset, 8)); - field_byte_end_offset = ACPI_DIV_8 (ACPI_ROUND_UP (field_bit_length + - field_bit_offset, 8)); - field_byte_length = field_byte_end_offset - field_byte_offset; + field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8)); + field_byte_end_offset = ACPI_DIV_8(ACPI_ROUND_UP(field_bit_length + + field_bit_offset, 8)); + field_byte_length = field_byte_end_offset - field_byte_offset; - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Bit length %d, Bit offset %d\n", - field_bit_length, field_bit_offset)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Bit length %d, Bit offset %d\n", + field_bit_length, field_bit_offset)); - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Byte Length %d, Byte Offset %d, End Offset %d\n", - field_byte_length, field_byte_offset, field_byte_end_offset)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Byte Length %d, Byte Offset %d, End Offset %d\n", + field_byte_length, field_byte_offset, + field_byte_end_offset)); /* * Iterative search for the maximum access width that is both aligned @@ -132,7 +121,8 @@ acpi_ex_generate_access ( * * Start at byte_acc and work upwards to qword_acc max. (1,2,4,8 bytes) */ - for (access_byte_width = 1; access_byte_width <= 8; access_byte_width <<= 1) { + for (access_byte_width = 1; access_byte_width <= 8; + access_byte_width <<= 1) { /* * 1) Round end offset up to next access boundary and make sure that * this does not go beyond the end of the parent region. @@ -140,31 +130,37 @@ acpi_ex_generate_access ( * are done. (This does not optimize for the perfectly aligned * case yet). */ - if (ACPI_ROUND_UP (field_byte_end_offset, access_byte_width) <= region_length) { + if (ACPI_ROUND_UP(field_byte_end_offset, access_byte_width) <= + region_length) { field_start_offset = - ACPI_ROUND_DOWN (field_byte_offset, access_byte_width) / - access_byte_width; + ACPI_ROUND_DOWN(field_byte_offset, + access_byte_width) / + access_byte_width; field_end_offset = - ACPI_ROUND_UP ((field_byte_length + field_byte_offset), - access_byte_width) / access_byte_width; + ACPI_ROUND_UP((field_byte_length + + field_byte_offset), + access_byte_width) / + access_byte_width; accesses = field_end_offset - field_start_offset; - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "access_width %d end is within region\n", access_byte_width)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "access_width %d end is within region\n", + access_byte_width)); - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Field Start %d, Field End %d -- requires %d accesses\n", - field_start_offset, field_end_offset, accesses)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Field Start %d, Field End %d -- requires %d accesses\n", + field_start_offset, field_end_offset, + accesses)); /* Single access is optimal */ if (accesses <= 1) { - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Entire field can be accessed with one operation of size %d\n", - access_byte_width)); - return_VALUE (access_byte_width); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Entire field can be accessed with one operation of size %d\n", + access_byte_width)); + return_VALUE(access_byte_width); } /* @@ -172,30 +168,30 @@ acpi_ex_generate_access ( * try the next wider access on next iteration */ if (accesses < minimum_accesses) { - minimum_accesses = accesses; + minimum_accesses = accesses; minimum_access_width = access_byte_width; } - } - else { - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "access_width %d end is NOT within region\n", access_byte_width)); + } else { + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "access_width %d end is NOT within region\n", + access_byte_width)); if (access_byte_width == 1) { - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Field goes beyond end-of-region!\n")); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Field goes beyond end-of-region!\n")); /* Field does not fit in the region at all */ - return_VALUE (0); + return_VALUE(0); } /* * This width goes beyond the end-of-region, back off to * previous access */ - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Backing off to previous optimal access width of %d\n", - minimum_access_width)); - return_VALUE (minimum_access_width); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Backing off to previous optimal access width of %d\n", + minimum_access_width)); + return_VALUE(minimum_access_width); } } @@ -203,12 +199,11 @@ acpi_ex_generate_access ( * Could not read/write field with one operation, * just use max access width */ - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Cannot access field in one operation, using width 8\n")); - return_VALUE (8); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Cannot access field in one operation, using width 8\n")); + return_VALUE(8); } -#endif /* ACPI_UNDER_DEVELOPMENT */ - +#endif /* ACPI_UNDER_DEVELOPMENT */ /******************************************************************************* * @@ -226,18 +221,14 @@ acpi_ex_generate_access ( ******************************************************************************/ static u32 -acpi_ex_decode_field_access ( - union acpi_operand_object *obj_desc, - u8 field_flags, - u32 *return_byte_alignment) +acpi_ex_decode_field_access(union acpi_operand_object *obj_desc, + u8 field_flags, u32 * return_byte_alignment) { - u32 access; - u32 byte_alignment; - u32 bit_length; - - - ACPI_FUNCTION_TRACE ("ex_decode_field_access"); + u32 access; + u32 byte_alignment; + u32 bit_length; + ACPI_FUNCTION_TRACE("ex_decode_field_access"); access = (field_flags & AML_FIELD_ACCESS_TYPE_MASK); @@ -246,9 +237,12 @@ acpi_ex_decode_field_access ( #ifdef ACPI_UNDER_DEVELOPMENT byte_alignment = - acpi_ex_generate_access (obj_desc->common_field.start_field_bit_offset, - obj_desc->common_field.bit_length, - 0xFFFFFFFF /* Temp until we pass region_length as parameter */); + acpi_ex_generate_access(obj_desc->common_field. + start_field_bit_offset, + obj_desc->common_field.bit_length, + 0xFFFFFFFF + /* Temp until we pass region_length as parameter */ + ); bit_length = byte_alignment * 8; #endif @@ -257,36 +251,35 @@ acpi_ex_decode_field_access ( break; case AML_FIELD_ACCESS_BYTE: - case AML_FIELD_ACCESS_BUFFER: /* ACPI 2.0 (SMBus Buffer) */ + case AML_FIELD_ACCESS_BUFFER: /* ACPI 2.0 (SMBus Buffer) */ byte_alignment = 1; - bit_length = 8; + bit_length = 8; break; case AML_FIELD_ACCESS_WORD: byte_alignment = 2; - bit_length = 16; + bit_length = 16; break; case AML_FIELD_ACCESS_DWORD: byte_alignment = 4; - bit_length = 32; + bit_length = 32; break; - case AML_FIELD_ACCESS_QWORD: /* ACPI 2.0 */ + case AML_FIELD_ACCESS_QWORD: /* ACPI 2.0 */ byte_alignment = 8; - bit_length = 64; + bit_length = 64; break; default: /* Invalid field access type */ - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Unknown field access type %X\n", - access)); - return_VALUE (0); + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Unknown field access type %X\n", access)); + return_VALUE(0); } - if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_BUFFER_FIELD) { + if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_BUFFER_FIELD) { /* * buffer_field access can be on any byte boundary, so the * byte_alignment is always 1 byte -- regardless of any byte_alignment @@ -296,10 +289,9 @@ acpi_ex_decode_field_access ( } *return_byte_alignment = byte_alignment; - return_VALUE (bit_length); + return_VALUE(bit_length); } - /******************************************************************************* * * FUNCTION: acpi_ex_prep_common_field_object @@ -322,20 +314,16 @@ acpi_ex_decode_field_access ( ******************************************************************************/ acpi_status -acpi_ex_prep_common_field_object ( - union acpi_operand_object *obj_desc, - u8 field_flags, - u8 field_attribute, - u32 field_bit_position, - u32 field_bit_length) +acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc, + u8 field_flags, + u8 field_attribute, + u32 field_bit_position, u32 field_bit_length) { - u32 access_bit_width; - u32 byte_alignment; - u32 nearest_byte_address; - - - ACPI_FUNCTION_TRACE ("ex_prep_common_field_object"); + u32 access_bit_width; + u32 byte_alignment; + u32 nearest_byte_address; + ACPI_FUNCTION_TRACE("ex_prep_common_field_object"); /* * Note: the structure being initialized is the @@ -361,16 +349,16 @@ acpi_ex_prep_common_field_object ( * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is * the same (equivalent) as the byte_alignment. */ - access_bit_width = acpi_ex_decode_field_access (obj_desc, field_flags, - &byte_alignment); + access_bit_width = acpi_ex_decode_field_access(obj_desc, field_flags, + &byte_alignment); if (!access_bit_width) { - return_ACPI_STATUS (AE_AML_OPERAND_VALUE); + return_ACPI_STATUS(AE_AML_OPERAND_VALUE); } /* Setup width (access granularity) fields */ obj_desc->common_field.access_byte_width = (u8) - ACPI_DIV_8 (access_bit_width); /* 1, 2, 4, 8 */ + ACPI_DIV_8(access_bit_width); /* 1, 2, 4, 8 */ obj_desc->common_field.access_bit_width = (u8) access_bit_width; @@ -385,30 +373,30 @@ acpi_ex_prep_common_field_object ( * region or buffer. */ nearest_byte_address = - ACPI_ROUND_BITS_DOWN_TO_BYTES (field_bit_position); + ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position); obj_desc->common_field.base_byte_offset = (u32) - ACPI_ROUND_DOWN (nearest_byte_address, byte_alignment); + ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment); /* * start_field_bit_offset is the offset of the first bit of the field within * a field datum. */ obj_desc->common_field.start_field_bit_offset = (u8) - (field_bit_position - ACPI_MUL_8 (obj_desc->common_field.base_byte_offset)); + (field_bit_position - + ACPI_MUL_8(obj_desc->common_field.base_byte_offset)); /* * Does the entire field fit within a single field access element? (datum) * (i.e., without crossing a datum boundary) */ - if ((obj_desc->common_field.start_field_bit_offset + field_bit_length) <= - (u16) access_bit_width) { + if ((obj_desc->common_field.start_field_bit_offset + + field_bit_length) <= (u16) access_bit_width) { obj_desc->common.flags |= AOPOBJ_SINGLE_DATUM; } - return_ACPI_STATUS (AE_OK); + return_ACPI_STATUS(AE_OK); } - /******************************************************************************* * * FUNCTION: acpi_ex_prep_field_value @@ -422,51 +410,49 @@ acpi_ex_prep_common_field_object ( * ******************************************************************************/ -acpi_status -acpi_ex_prep_field_value ( - struct acpi_create_field_info *info) +acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info) { - union acpi_operand_object *obj_desc; - u32 type; - acpi_status status; - - - ACPI_FUNCTION_TRACE ("ex_prep_field_value"); + union acpi_operand_object *obj_desc; + u32 type; + acpi_status status; + ACPI_FUNCTION_TRACE("ex_prep_field_value"); /* Parameter validation */ if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) { if (!info->region_node) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null region_node\n")); - return_ACPI_STATUS (AE_AML_NO_OPERAND); + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Null region_node\n")); + return_ACPI_STATUS(AE_AML_NO_OPERAND); } - type = acpi_ns_get_type (info->region_node); + type = acpi_ns_get_type(info->region_node); if (type != ACPI_TYPE_REGION) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Needed Region, found type %X (%s)\n", - type, acpi_ut_get_type_name (type))); + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Needed Region, found type %X (%s)\n", + type, acpi_ut_get_type_name(type))); - return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } } /* Allocate a new field object */ - obj_desc = acpi_ut_create_internal_object (info->field_type); + obj_desc = acpi_ut_create_internal_object(info->field_type); if (!obj_desc) { - return_ACPI_STATUS (AE_NO_MEMORY); + return_ACPI_STATUS(AE_NO_MEMORY); } /* Initialize areas of the object that are common to all fields */ obj_desc->common_field.node = info->field_node; - status = acpi_ex_prep_common_field_object (obj_desc, info->field_flags, - info->attribute, info->field_bit_position, info->field_bit_length); - if (ACPI_FAILURE (status)) { - acpi_ut_delete_object_desc (obj_desc); - return_ACPI_STATUS (status); + status = acpi_ex_prep_common_field_object(obj_desc, info->field_flags, + info->attribute, + info->field_bit_position, + info->field_bit_length); + if (ACPI_FAILURE(status)) { + acpi_ut_delete_object_desc(obj_desc); + return_ACPI_STATUS(status); } /* Initialize areas of the object that are specific to the field type */ @@ -474,71 +460,73 @@ acpi_ex_prep_field_value ( switch (info->field_type) { case ACPI_TYPE_LOCAL_REGION_FIELD: - obj_desc->field.region_obj = acpi_ns_get_attached_object (info->region_node); + obj_desc->field.region_obj = + acpi_ns_get_attached_object(info->region_node); /* An additional reference for the container */ - acpi_ut_add_reference (obj_desc->field.region_obj); + acpi_ut_add_reference(obj_desc->field.region_obj); - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "region_field: bit_off %X, Off %X, Gran %X, Region %p\n", - obj_desc->field.start_field_bit_offset, obj_desc->field.base_byte_offset, - obj_desc->field.access_byte_width, obj_desc->field.region_obj)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "region_field: bit_off %X, Off %X, Gran %X, Region %p\n", + obj_desc->field.start_field_bit_offset, + obj_desc->field.base_byte_offset, + obj_desc->field.access_byte_width, + obj_desc->field.region_obj)); break; - case ACPI_TYPE_LOCAL_BANK_FIELD: - obj_desc->bank_field.value = info->bank_value; - obj_desc->bank_field.region_obj = acpi_ns_get_attached_object ( - info->region_node); - obj_desc->bank_field.bank_obj = acpi_ns_get_attached_object ( - info->register_node); + obj_desc->bank_field.value = info->bank_value; + obj_desc->bank_field.region_obj = + acpi_ns_get_attached_object(info->region_node); + obj_desc->bank_field.bank_obj = + acpi_ns_get_attached_object(info->register_node); /* An additional reference for the attached objects */ - acpi_ut_add_reference (obj_desc->bank_field.region_obj); - acpi_ut_add_reference (obj_desc->bank_field.bank_obj); + acpi_ut_add_reference(obj_desc->bank_field.region_obj); + acpi_ut_add_reference(obj_desc->bank_field.bank_obj); - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "Bank Field: bit_off %X, Off %X, Gran %X, Region %p, bank_reg %p\n", - obj_desc->bank_field.start_field_bit_offset, - obj_desc->bank_field.base_byte_offset, - obj_desc->field.access_byte_width, - obj_desc->bank_field.region_obj, - obj_desc->bank_field.bank_obj)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Bank Field: bit_off %X, Off %X, Gran %X, Region %p, bank_reg %p\n", + obj_desc->bank_field.start_field_bit_offset, + obj_desc->bank_field.base_byte_offset, + obj_desc->field.access_byte_width, + obj_desc->bank_field.region_obj, + obj_desc->bank_field.bank_obj)); break; - case ACPI_TYPE_LOCAL_INDEX_FIELD: - obj_desc->index_field.index_obj = acpi_ns_get_attached_object ( - info->register_node); - obj_desc->index_field.data_obj = acpi_ns_get_attached_object ( - info->data_register_node); - obj_desc->index_field.value = (u32) - (info->field_bit_position / ACPI_MUL_8 ( - obj_desc->field.access_byte_width)); - - if (!obj_desc->index_field.data_obj || !obj_desc->index_field.index_obj) { - ACPI_REPORT_ERROR (("Null Index Object during field prep\n")); - acpi_ut_delete_object_desc (obj_desc); - return_ACPI_STATUS (AE_AML_INTERNAL); + obj_desc->index_field.index_obj = + acpi_ns_get_attached_object(info->register_node); + obj_desc->index_field.data_obj = + acpi_ns_get_attached_object(info->data_register_node); + obj_desc->index_field.value = (u32) + (info->field_bit_position / + ACPI_MUL_8(obj_desc->field.access_byte_width)); + + if (!obj_desc->index_field.data_obj + || !obj_desc->index_field.index_obj) { + ACPI_REPORT_ERROR(("Null Index Object during field prep\n")); + acpi_ut_delete_object_desc(obj_desc); + return_ACPI_STATUS(AE_AML_INTERNAL); } /* An additional reference for the attached objects */ - acpi_ut_add_reference (obj_desc->index_field.data_obj); - acpi_ut_add_reference (obj_desc->index_field.index_obj); - - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, - "index_field: bit_off %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n", - obj_desc->index_field.start_field_bit_offset, - obj_desc->index_field.base_byte_offset, - obj_desc->index_field.value, - obj_desc->field.access_byte_width, - obj_desc->index_field.index_obj, - obj_desc->index_field.data_obj)); + acpi_ut_add_reference(obj_desc->index_field.data_obj); + acpi_ut_add_reference(obj_desc->index_field.index_obj); + + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "index_field: bit_off %X, Off %X, Value %X, Gran %X, Index %p, Data %p\n", + obj_desc->index_field.start_field_bit_offset, + obj_desc->index_field.base_byte_offset, + obj_desc->index_field.value, + obj_desc->field.access_byte_width, + obj_desc->index_field.index_obj, + obj_desc->index_field.data_obj)); break; default: @@ -550,15 +538,16 @@ acpi_ex_prep_field_value ( * Store the constructed descriptor (obj_desc) into the parent Node, * preserving the current type of that named_obj. */ - status = acpi_ns_attach_object (info->field_node, obj_desc, - acpi_ns_get_type (info->field_node)); + status = acpi_ns_attach_object(info->field_node, obj_desc, + acpi_ns_get_type(info->field_node)); - ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Set named_obj %p [%4.4s], obj_desc %p\n", - info->field_node, acpi_ut_get_node_name (info->field_node), obj_desc)); + ACPI_DEBUG_PRINT((ACPI_DB_BFIELD, + "Set named_obj %p [%4.4s], obj_desc %p\n", + info->field_node, + acpi_ut_get_node_name(info->field_node), obj_desc)); /* Remove local reference to the object */ - acpi_ut_remove_reference (obj_desc); - return_ACPI_STATUS (status); + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); } - |