1 files changed, 254 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/rsio.c b/drivers/acpi/acpica/rsio.c
new file mode 100644
index 0000000000..687aaed965
--- /dev/null
+++ b/drivers/acpi/acpica/rsio.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*******************************************************************************
+ *
+ * Module Name: rsio - IO and DMA resource descriptors
+ *
+ ******************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acresrc.h"
+
+#define _COMPONENT          ACPI_RESOURCES
+ACPI_MODULE_NAME("rsio")
+
+/*******************************************************************************
+ *
+ * acpi_rs_convert_io
+ *
+ ******************************************************************************/
+struct acpi_rsconvert_info acpi_rs_convert_io[5] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IO,
+	 ACPI_RS_SIZE(struct acpi_resource_io),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_io)},
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IO,
+	 sizeof(struct aml_resource_io),
+	 0},
+
+	/* Decode flag */
+
+	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.io.io_decode),
+	 AML_OFFSET(io.flags),
+	 0},
+	/*
+	 * These fields are contiguous in both the source and destination:
+	 * Address Alignment
+	 * Length
+	 * Minimum Base Address
+	 * Maximum Base Address
+	 */
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.io.alignment),
+	 AML_OFFSET(io.alignment),
+	 2},
+
+	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.io.minimum),
+	 AML_OFFSET(io.minimum),
+	 2}
+};
+
+/*******************************************************************************
+ *
+ * acpi_rs_convert_fixed_io
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_convert_fixed_io[4] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_IO,
+	 ACPI_RS_SIZE(struct acpi_resource_fixed_io),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_io)},
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_IO,
+	 sizeof(struct aml_resource_fixed_io),
+	 0},
+	/*
+	 * These fields are contiguous in both the source and destination:
+	 * Base Address
+	 * Length
+	 */
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_io.address_length),
+	 AML_OFFSET(fixed_io.address_length),
+	 1},
+
+	{ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_io.address),
+	 AML_OFFSET(fixed_io.address),
+	 1}
+};
+
+/*******************************************************************************
+ *
+ * acpi_rs_convert_generic_reg
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_convert_generic_reg[4] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_GENERIC_REGISTER,
+	 ACPI_RS_SIZE(struct acpi_resource_generic_register),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_generic_reg)},
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_GENERIC_REGISTER,
+	 sizeof(struct aml_resource_generic_register),
+	 0},
+	/*
+	 * These fields are contiguous in both the source and destination:
+	 * Address Space ID
+	 * Register Bit Width
+	 * Register Bit Offset
+	 * Access Size
+	 */
+	{ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.generic_reg.space_id),
+	 AML_OFFSET(generic_reg.address_space_id),
+	 4},
+
+	/* Get the Register Address */
+
+	{ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.generic_reg.address),
+	 AML_OFFSET(generic_reg.address),
+	 1}
+};
+
+/*******************************************************************************
+ *
+ * acpi_rs_convert_end_dpf
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_convert_end_dpf[2] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_END_DEPENDENT,
+	 ACPI_RS_SIZE_MIN,
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_end_dpf)},
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_END_DEPENDENT,
+	 sizeof(struct aml_resource_end_dependent),
+	 0}
+};
+
+/*******************************************************************************
+ *
+ * acpi_rs_convert_end_tag
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_convert_end_tag[2] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_END_TAG,
+	 ACPI_RS_SIZE_MIN,
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_end_tag)},
+
+	/*
+	 * Note: The checksum field is set to zero, meaning that the resource
+	 * data is treated as if the checksum operation succeeded.
+	 * (ACPI Spec 1.0b Section 6.4.2.8)
+	 */
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_END_TAG,
+	 sizeof(struct aml_resource_end_tag),
+	 0}
+};
+
+/*******************************************************************************
+ *
+ * acpi_rs_get_start_dpf
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_get_start_dpf[6] = {
+	{ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_START_DEPENDENT,
+	 ACPI_RS_SIZE(struct acpi_resource_start_dependent),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_get_start_dpf)},
+
+	/* Defaults for Compatibility and Performance priorities */
+
+	{ACPI_RSC_SET8, ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
+	 ACPI_ACCEPTABLE_CONFIGURATION,
+	 2},
+
+	/* Get the descriptor length (0 or 1 for Start Dpf descriptor) */
+
+	{ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
+	 AML_OFFSET(start_dpf.descriptor_type),
+	 0},
+
+	/* All done if there is no flag byte present in the descriptor */
+
+	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 1},
+
+	/* Flag byte is present, get the flags */
+
+	{ACPI_RSC_2BITFLAG,
+	 ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
+	 AML_OFFSET(start_dpf.flags),
+	 0},
+
+	{ACPI_RSC_2BITFLAG,
+	 ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
+	 AML_OFFSET(start_dpf.flags),
+	 2}
+};
+
+/*******************************************************************************
+ *
+ * acpi_rs_set_start_dpf
+ *
+ ******************************************************************************/
+
+struct acpi_rsconvert_info acpi_rs_set_start_dpf[10] = {
+	/* Start with a default descriptor of length 1 */
+
+	{ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_START_DEPENDENT,
+	 sizeof(struct aml_resource_start_dependent),
+	 ACPI_RSC_TABLE_SIZE(acpi_rs_set_start_dpf)},
+
+	/* Set the default flag values */
+
+	{ACPI_RSC_2BITFLAG,
+	 ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
+	 AML_OFFSET(start_dpf.flags),
+	 0},
+
+	{ACPI_RSC_2BITFLAG,
+	 ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
+	 AML_OFFSET(start_dpf.flags),
+	 2},
+	/*
+	 * All done if the output descriptor length is required to be 1
+	 * (i.e., optimization to 0 bytes cannot be attempted)
+	 */
+	{ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
+	 ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
+	 1},
+
+	/* Set length to 0 bytes (no flags byte) */
+
+	{ACPI_RSC_LENGTH, 0, 0,
+	 sizeof(struct aml_resource_start_dependent_noprio)},
+
+	/*
+	 * All done if the output descriptor length is required to be 0.
+	 *
+	 * TBD: Perhaps we should check for error if input flags are not
+	 * compatible with a 0-byte descriptor.
+	 */
+	{ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
+	 ACPI_RS_OFFSET(data.start_dpf.descriptor_length),
+	 0},
+
+	/* Reset length to 1 byte (descriptor with flags byte) */
+
+	{ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_start_dependent)},
+
+	/*
+	 * All done if flags byte is necessary -- if either priority value
+	 * is not ACPI_ACCEPTABLE_CONFIGURATION
+	 */
+	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
+	 ACPI_RS_OFFSET(data.start_dpf.compatibility_priority),
+	 ACPI_ACCEPTABLE_CONFIGURATION},
+
+	{ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
+	 ACPI_RS_OFFSET(data.start_dpf.performance_robustness),
+	 ACPI_ACCEPTABLE_CONFIGURATION},
+
+	/* Flag byte is not necessary */
+
+	{ACPI_RSC_LENGTH, 0, 0,
+	 sizeof(struct aml_resource_start_dependent_noprio)}
+};