Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/executer/exprep.c b/drivers/acpi/executer/exprep.c
new file mode 100644
index 0000000..264ef3b
--- /dev/null
+++ b/drivers/acpi/executer/exprep.c
@@ -0,0 +1,530 @@
+
+/******************************************************************************
+ *
+ * Module Name: exprep - ACPI AML (p-code) execution - field prep utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * 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")
+
+
+#ifdef ACPI_UNDER_DEVELOPMENT
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_generate_access
+ *
+ * PARAMETERS: field_bit_offset - Start of field within parent region/buffer
+ * field_bit_length - Length of field in bits
+ * region_length - Length of parent in bytes
+ *
+ * RETURN: Field granularity (8, 16, 32 or 64) and
+ * byte_alignment (1, 2, 3, or 4)
+ *
+ * DESCRIPTION: Generate an optimal access width for fields defined with the
+ * any_acc keyword.
+ *
+ * NOTE: Need to have the region_length in order to check for boundary
+ * conditions (end-of-region). However, the region_length is a deferred
+ * operation. Therefore, to complete this implementation, the generation
+ * of this access width must be deferred until the region length has
+ * been evaluated.
+ *
+ ******************************************************************************/
+
+static u32
+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");
+
+
+ /* 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;
+
+ 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));
+
+ /*
+ * Iterative search for the maximum access width that is both aligned
+ * and does not go beyond the end of the region
+ *
+ * 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) {
+ /*
+ * 1) Round end offset up to next access boundary and make sure that this
+ * does not go beyond the end of the parent region.
+ * 2) When the Access width is greater than the field_byte_length, we 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) {
+ field_start_offset = 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;
+ 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,
+ "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);
+ }
+
+ /*
+ * Fits in the region, but requires more than one read/write.
+ * try the next wider access on next iteration
+ */
+ if (accesses < minimum_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));
+ if (access_byte_width == 1) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_BFIELD,
+ "Field goes beyond end-of-region!\n"));
+ return_VALUE (0); /* Field does not fit in the region at all */
+ }
+
+ /* 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);
+ }
+ }
+
+ /* 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);
+}
+#endif /* ACPI_UNDER_DEVELOPMENT */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_decode_field_access
+ *
+ * PARAMETERS: Access - Encoded field access bits
+ * Length - Field length.
+ *
+ * RETURN: Field granularity (8, 16, 32 or 64) and
+ * byte_alignment (1, 2, 3, or 4)
+ *
+ * DESCRIPTION: Decode the access_type bits of a field definition.
+ *
+ ******************************************************************************/
+
+static u32
+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");
+
+
+ access = (field_flags & AML_FIELD_ACCESS_TYPE_MASK);
+
+ switch (access) {
+ case AML_FIELD_ACCESS_ANY:
+
+#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 param */);
+ bit_length = byte_alignment * 8;
+#endif
+
+ byte_alignment = 1;
+ bit_length = 8;
+ break;
+
+ case AML_FIELD_ACCESS_BYTE:
+ case AML_FIELD_ACCESS_BUFFER: /* ACPI 2.0 (SMBus Buffer) */
+ byte_alignment = 1;
+ bit_length = 8;
+ break;
+
+ case AML_FIELD_ACCESS_WORD:
+ byte_alignment = 2;
+ bit_length = 16;
+ break;
+
+ case AML_FIELD_ACCESS_DWORD:
+ byte_alignment = 4;
+ bit_length = 32;
+ break;
+
+ case AML_FIELD_ACCESS_QWORD: /* ACPI 2.0 */
+ byte_alignment = 8;
+ 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);
+ }
+
+ 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
+ * implied by the field access type.
+ */
+ byte_alignment = 1;
+ }
+
+ *return_byte_alignment = byte_alignment;
+ return_VALUE (bit_length);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_prep_common_field_object
+ *
+ * PARAMETERS: obj_desc - The field object
+ * field_flags - Access, lock_rule, and update_rule.
+ * The format of a field_flag is described
+ * in the ACPI specification
+ * field_bit_position - Field start position
+ * field_bit_length - Field length in number of bits
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Initialize the areas of the field object that are common
+ * to the various types of fields. Note: This is very "sensitive"
+ * code because we are solving the general case for field
+ * alignment.
+ *
+ ******************************************************************************/
+
+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)
+{
+ 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
+ * ACPI_COMMON_FIELD_INFO; No structure fields outside of the common
+ * area are initialized by this procedure.
+ */
+ obj_desc->common_field.field_flags = field_flags;
+ obj_desc->common_field.attribute = field_attribute;
+ obj_desc->common_field.bit_length = field_bit_length;
+
+ /*
+ * Decode the access type so we can compute offsets. The access type gives
+ * two pieces of information - the width of each field access and the
+ * necessary byte_alignment (address granularity) of the access.
+ *
+ * For any_acc, the access_bit_width is the largest width that is both
+ * necessary and possible in an attempt to access the whole field in one
+ * I/O operation. However, for any_acc, the byte_alignment is always one
+ * byte.
+ *
+ * For all Buffer Fields, the byte_alignment is always one byte.
+ *
+ * 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);
+ if (!access_bit_width) {
+ 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 */
+
+ obj_desc->common_field.access_bit_width = (u8) access_bit_width;
+
+ /*
+ * base_byte_offset is the address of the start of the field within the
+ * region. It is the byte address of the first *datum* (field-width data
+ * unit) of the field. (i.e., the first datum that contains at least the
+ * first *bit* of the field.)
+ *
+ * Note: byte_alignment is always either equal to the access_bit_width or 8
+ * (Byte access), and it defines the addressing granularity of the parent
+ * region or buffer.
+ */
+ nearest_byte_address =
+ 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);
+
+ /*
+ * 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));
+
+ /*
+ * 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) {
+ obj_desc->common.flags |= AOPOBJ_SINGLE_DATUM;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_prep_field_value
+ *
+ * PARAMETERS: Node - Owning Node
+ * region_node - Region in which field is being defined
+ * field_flags - Access, lock_rule, and update_rule.
+ * field_bit_position - Field start position
+ * field_bit_length - Field length in number of bits
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Construct an union acpi_operand_object of type def_field and
+ * connect it to the parent Node.
+ *
+ ******************************************************************************/
+
+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");
+
+
+ /* 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);
+ }
+
+ 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)));
+
+ return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ }
+ }
+
+ /* Allocate a new field object */
+
+ obj_desc = acpi_ut_create_internal_object (info->field_type);
+ if (!obj_desc) {
+ 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);
+ }
+
+ /* Initialize areas of the object that are specific to the field type */
+
+ switch (info->field_type) {
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+
+ 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_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);
+
+ /* 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_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);
+ }
+
+ /* 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));
+ break;
+
+ default:
+ /* No other types should get here */
+ break;
+ }
+
+ /*
+ * 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));
+
+ 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);
+}
+