summaryrefslogtreecommitdiff
path: root/drivers/acpi/executer/exfldio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/executer/exfldio.c')
-rw-r--r--drivers/acpi/executer/exfldio.c133
1 files changed, 87 insertions, 46 deletions
diff --git a/drivers/acpi/executer/exfldio.c b/drivers/acpi/executer/exfldio.c
index 9d0f9d2e9061..3c2f89e00f78 100644
--- a/drivers/acpi/executer/exfldio.c
+++ b/drivers/acpi/executer/exfldio.c
@@ -52,12 +52,31 @@
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exfldio")
+/* Local prototypes */
+
+static acpi_status
+acpi_ex_field_datum_io (
+ union acpi_operand_object *obj_desc,
+ u32 field_datum_byte_offset,
+ acpi_integer *value,
+ u32 read_write);
+
+static u8
+acpi_ex_register_overflow (
+ union acpi_operand_object *obj_desc,
+ acpi_integer value);
+
+static acpi_status
+acpi_ex_setup_region (
+ union acpi_operand_object *obj_desc,
+ u32 field_datum_byte_offset);
+
/*******************************************************************************
*
* FUNCTION: acpi_ex_setup_region
*
- * PARAMETERS: *obj_desc - Field to be read or written
+ * PARAMETERS: obj_desc - Field to be read or written
* field_datum_byte_offset - Byte offset of this datum within the
* parent field
*
@@ -69,7 +88,7 @@
*
******************************************************************************/
-acpi_status
+static acpi_status
acpi_ex_setup_region (
union acpi_operand_object *obj_desc,
u32 field_datum_byte_offset)
@@ -127,9 +146,9 @@ acpi_ex_setup_region (
* length of one field datum (access width) must fit within the region.
* (Region length is specified in bytes)
*/
- if (rgn_desc->region.length < (obj_desc->common_field.base_byte_offset
- + field_datum_byte_offset
- + obj_desc->common_field.access_byte_width)) {
+ if (rgn_desc->region.length < (obj_desc->common_field.base_byte_offset +
+ field_datum_byte_offset +
+ obj_desc->common_field.access_byte_width)) {
if (acpi_gbl_enable_interpreter_slack) {
/*
* Slack mode only: We will go ahead and allow access to this
@@ -155,7 +174,8 @@ acpi_ex_setup_region (
"Field [%4.4s] access width (%d bytes) too large for region [%4.4s] (length %X)\n",
acpi_ut_get_node_name (obj_desc->common_field.node),
obj_desc->common_field.access_byte_width,
- acpi_ut_get_node_name (rgn_desc->region.node), rgn_desc->region.length));
+ acpi_ut_get_node_name (rgn_desc->region.node),
+ rgn_desc->region.length));
}
/*
@@ -167,7 +187,8 @@ acpi_ex_setup_region (
acpi_ut_get_node_name (obj_desc->common_field.node),
obj_desc->common_field.base_byte_offset,
field_datum_byte_offset, obj_desc->common_field.access_byte_width,
- acpi_ut_get_node_name (rgn_desc->region.node), rgn_desc->region.length));
+ acpi_ut_get_node_name (rgn_desc->region.node),
+ rgn_desc->region.length));
return_ACPI_STATUS (AE_AML_REGION_LIMIT);
}
@@ -180,10 +201,10 @@ acpi_ex_setup_region (
*
* FUNCTION: acpi_ex_access_region
*
- * PARAMETERS: *obj_desc - Field to be read
+ * PARAMETERS: obj_desc - Field to be read
* field_datum_byte_offset - Byte offset of this datum within the
* parent field
- * *Value - Where to store value (must at least
+ * Value - Where to store value (must at least
* the size of acpi_integer)
* Function - Read or Write flag plus other region-
* dependent flags
@@ -226,9 +247,9 @@ acpi_ex_access_region (
* 3) The current offset into the field
*/
rgn_desc = obj_desc->common_field.region_obj;
- address = rgn_desc->region.address
- + obj_desc->common_field.base_byte_offset
- + field_datum_byte_offset;
+ address = rgn_desc->region.address +
+ obj_desc->common_field.base_byte_offset +
+ field_datum_byte_offset;
if ((function & ACPI_IO_MASK) == ACPI_READ) {
ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "[READ]"));
@@ -249,7 +270,8 @@ acpi_ex_access_region (
/* Invoke the appropriate address_space/op_region handler */
status = acpi_ev_address_space_dispatch (rgn_desc, function,
- address, ACPI_MUL_8 (obj_desc->common_field.access_byte_width), value);
+ address,
+ ACPI_MUL_8 (obj_desc->common_field.access_byte_width), value);
if (ACPI_FAILURE (status)) {
if (status == AE_NOT_IMPLEMENTED) {
@@ -274,7 +296,7 @@ acpi_ex_access_region (
*
* FUNCTION: acpi_ex_register_overflow
*
- * PARAMETERS: *obj_desc - Register(Field) to be written
+ * PARAMETERS: obj_desc - Register(Field) to be written
* Value - Value to be stored
*
* RETURN: TRUE if value overflows the field, FALSE otherwise
@@ -287,7 +309,7 @@ acpi_ex_access_region (
*
******************************************************************************/
-u8
+static u8
acpi_ex_register_overflow (
union acpi_operand_object *obj_desc,
acpi_integer value)
@@ -319,10 +341,10 @@ acpi_ex_register_overflow (
*
* FUNCTION: acpi_ex_field_datum_io
*
- * PARAMETERS: *obj_desc - Field to be read
+ * PARAMETERS: obj_desc - Field to be read
* field_datum_byte_offset - Byte offset of this datum within the
* parent field
- * *Value - Where to store value (must be 64 bits)
+ * Value - Where to store value (must be 64 bits)
* read_write - Read or Write flag
*
* RETURN: Status
@@ -333,7 +355,7 @@ acpi_ex_register_overflow (
*
******************************************************************************/
-acpi_status
+static acpi_status
acpi_ex_field_datum_io (
union acpi_operand_object *obj_desc,
u32 field_datum_byte_offset,
@@ -350,7 +372,9 @@ acpi_ex_field_datum_io (
if (read_write == ACPI_READ) {
if (!value) {
local_value = 0;
- value = &local_value; /* To support reads without saving return value */
+
+ /* To support reads without saving return value */
+ value = &local_value;
}
/* Clear the entire return buffer first, [Very Important!] */
@@ -363,8 +387,10 @@ acpi_ex_field_datum_io (
*
* buffer_field - Read/write from/to a Buffer
* region_field - Read/write from/to a Operation Region.
- * bank_field - Write to a Bank Register, then read/write from/to an op_region
- * index_field - Write to an Index Register, then read/write from/to a Data Register
+ * bank_field - Write to a Bank Register, then read/write from/to an
+ * operation_region
+ * index_field - Write to an Index Register, then read/write from/to a
+ * Data Register
*/
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_BUFFER_FIELD:
@@ -384,19 +410,20 @@ acpi_ex_field_datum_io (
* Copy the data from the source buffer.
* Length is the field width in bytes.
*/
- ACPI_MEMCPY (value, (obj_desc->buffer_field.buffer_obj)->buffer.pointer
- + obj_desc->buffer_field.base_byte_offset
- + field_datum_byte_offset,
- obj_desc->common_field.access_byte_width);
+ ACPI_MEMCPY (value,
+ (obj_desc->buffer_field.buffer_obj)->buffer.pointer +
+ obj_desc->buffer_field.base_byte_offset +
+ field_datum_byte_offset,
+ obj_desc->common_field.access_byte_width);
}
else {
/*
* Copy the data to the target buffer.
* Length is the field width in bytes.
*/
- ACPI_MEMCPY ((obj_desc->buffer_field.buffer_obj)->buffer.pointer
- + obj_desc->buffer_field.base_byte_offset
- + field_datum_byte_offset,
+ ACPI_MEMCPY ((obj_desc->buffer_field.buffer_obj)->buffer.pointer +
+ obj_desc->buffer_field.base_byte_offset +
+ field_datum_byte_offset,
value, obj_desc->common_field.access_byte_width);
}
@@ -406,8 +433,10 @@ acpi_ex_field_datum_io (
case ACPI_TYPE_LOCAL_BANK_FIELD:
- /* Ensure that the bank_value is not beyond the capacity of the register */
-
+ /*
+ * Ensure that the bank_value is not beyond the capacity of
+ * the register
+ */
if (acpi_ex_register_overflow (obj_desc->bank_field.bank_obj,
(acpi_integer) obj_desc->bank_field.value)) {
return_ACPI_STATUS (AE_AML_REGISTER_LIMIT);
@@ -445,8 +474,10 @@ acpi_ex_field_datum_io (
case ACPI_TYPE_LOCAL_INDEX_FIELD:
- /* Ensure that the index_value is not beyond the capacity of the register */
-
+ /*
+ * Ensure that the index_value is not beyond the capacity of
+ * the register
+ */
if (acpi_ex_register_overflow (obj_desc->index_field.index_obj,
(acpi_integer) obj_desc->index_field.value)) {
return_ACPI_STATUS (AE_AML_REGISTER_LIMIT);
@@ -496,14 +527,16 @@ acpi_ex_field_datum_io (
if (ACPI_SUCCESS (status)) {
if (read_write == ACPI_READ) {
- ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Value Read %8.8X%8.8X, Width %d\n",
- ACPI_FORMAT_UINT64 (*value),
- obj_desc->common_field.access_byte_width));
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "Value Read %8.8X%8.8X, Width %d\n",
+ ACPI_FORMAT_UINT64 (*value),
+ obj_desc->common_field.access_byte_width));
}
else {
- ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD, "Value Written %8.8X%8.8X, Width %d\n",
- ACPI_FORMAT_UINT64 (*value),
- obj_desc->common_field.access_byte_width));
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "Value Written %8.8X%8.8X, Width %d\n",
+ ACPI_FORMAT_UINT64 (*value),
+ obj_desc->common_field.access_byte_width));
}
}
@@ -515,8 +548,10 @@ acpi_ex_field_datum_io (
*
* FUNCTION: acpi_ex_write_with_update_rule
*
- * PARAMETERS: *obj_desc - Field to be set
- * Value - Value to store
+ * PARAMETERS: obj_desc - Field to be written
+ * Mask - bitmask within field datum
+ * field_value - Value to write
+ * field_datum_byte_offset - Offset of datum within field
*
* RETURN: Status
*
@@ -689,7 +724,8 @@ acpi_ex_extract_from_field (
/* Merge with previous datum if necessary */
merged_datum |= raw_datum <<
- (obj_desc->common_field.access_bit_width - obj_desc->common_field.start_field_bit_offset);
+ (obj_desc->common_field.access_bit_width -
+ obj_desc->common_field.start_field_bit_offset);
if (i == datum_count) {
break;
@@ -707,7 +743,8 @@ acpi_ex_extract_from_field (
/* Mask off any extra bits in the last datum */
- buffer_tail_bits = obj_desc->common_field.bit_length % obj_desc->common_field.access_bit_width;
+ buffer_tail_bits = obj_desc->common_field.bit_length %
+ obj_desc->common_field.access_bit_width;
if (buffer_tail_bits) {
merged_datum &= ACPI_MASK_BITS_ABOVE (buffer_tail_bits);
}
@@ -791,7 +828,8 @@ acpi_ex_insert_into_field (
/* Write merged datum to the target field */
merged_datum &= mask;
- status = acpi_ex_write_with_update_rule (obj_desc, mask, merged_datum, field_offset);
+ status = acpi_ex_write_with_update_rule (obj_desc, mask,
+ merged_datum, field_offset);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
@@ -800,7 +838,8 @@ acpi_ex_insert_into_field (
field_offset += obj_desc->common_field.access_byte_width;
merged_datum = raw_datum >>
- (obj_desc->common_field.access_bit_width - obj_desc->common_field.start_field_bit_offset);
+ (obj_desc->common_field.access_bit_width -
+ obj_desc->common_field.start_field_bit_offset);
mask = ACPI_INTEGER_MAX;
if (i == datum_count) {
@@ -819,7 +858,8 @@ acpi_ex_insert_into_field (
/* Mask off any extra bits in the last datum */
buffer_tail_bits = (obj_desc->common_field.bit_length +
- obj_desc->common_field.start_field_bit_offset) % obj_desc->common_field.access_bit_width;
+ obj_desc->common_field.start_field_bit_offset) %
+ obj_desc->common_field.access_bit_width;
if (buffer_tail_bits) {
mask &= ACPI_MASK_BITS_ABOVE (buffer_tail_bits);
}
@@ -827,7 +867,8 @@ acpi_ex_insert_into_field (
/* Write the last datum to the field */
merged_datum &= mask;
- status = acpi_ex_write_with_update_rule (obj_desc, mask, merged_datum, field_offset);
+ status = acpi_ex_write_with_update_rule (obj_desc,
+ mask, merged_datum, field_offset);
return_ACPI_STATUS (status);
}