Orange Pi5 kernel

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: psutils - Parser miscellaneous utilities (Parser only)
 *
 * Copyright (C) 2000 - 2020, Intel Corp.
 *
 *****************************************************************************/
 
#include <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acconvert.h"
 
#define _COMPONENT          ACPI_PARSER
ACPI_MODULE_NAME("psutils")
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_create_scope_op
 *
 * PARAMETERS:  None
 *
 * RETURN:      A new Scope object, null on failure
 *
 * DESCRIPTION: Create a Scope and associated namepath op with the root name
 *
 ******************************************************************************/
union acpi_parse_object *acpi_ps_create_scope_op(u8 *aml)
{
<------>union acpi_parse_object *scope_op;
 
<------>scope_op = acpi_ps_alloc_op(AML_SCOPE_OP, aml);
<------>if (!scope_op) {
<------><------>return (NULL);
<------>}
 
<------>scope_op->named.name = ACPI_ROOT_NAME;
<------>return (scope_op);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_init_op
 *
 * PARAMETERS:  op              - A newly allocated Op object
 *              opcode          - Opcode to store in the Op
 *
 * RETURN:      None
 *
 * DESCRIPTION: Initialize a parse (Op) object
 *
 ******************************************************************************/
 
void acpi_ps_init_op(union acpi_parse_object *op, u16 opcode)
{
<------>ACPI_FUNCTION_ENTRY();
 
<------>op->common.descriptor_type = ACPI_DESC_TYPE_PARSER;
<------>op->common.aml_opcode = opcode;
 
<------>ACPI_DISASM_ONLY_MEMBERS(acpi_ut_safe_strncpy(op->common.aml_op_name,
<------><------><------><------><------><------>      (acpi_ps_get_opcode_info
<------><------><------><------><------><------>       (opcode))->name,
<------><------><------><------><------><------>      sizeof(op->common.
<------><------><------><------><------><------><------>     aml_op_name)));
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_alloc_op
 *
 * PARAMETERS:  opcode          - Opcode that will be stored in the new Op
 *              aml             - Address of the opcode
 *
 * RETURN:      Pointer to the new Op, null on failure
 *
 * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
 *              opcode. A cache of opcodes is available for the pure
 *              GENERIC_OP, since this is by far the most commonly used.
 *
 ******************************************************************************/
 
union acpi_parse_object *acpi_ps_alloc_op(u16 opcode, u8 *aml)
{
<------>union acpi_parse_object *op;
<------>const struct acpi_opcode_info *op_info;
<------>u8 flags = ACPI_PARSEOP_GENERIC;
 
<------>ACPI_FUNCTION_ENTRY();
 
<------>op_info = acpi_ps_get_opcode_info(opcode);
 
<------>/* Determine type of parse_op required */
 
<------>if (op_info->flags & AML_DEFER) {
<------><------>flags = ACPI_PARSEOP_DEFERRED;
<------>} else if (op_info->flags & AML_NAMED) {
<------><------>flags = ACPI_PARSEOP_NAMED_OBJECT;
<------>} else if (opcode == AML_INT_BYTELIST_OP) {
<------><------>flags = ACPI_PARSEOP_BYTELIST;
<------>}
 
<------>/* Allocate the minimum required size object */
 
<------>if (flags == ACPI_PARSEOP_GENERIC) {
 
<------><------>/* The generic op (default) is by far the most common (16 to 1) */
 
<------><------>op = acpi_os_acquire_object(acpi_gbl_ps_node_cache);
<------>} else {
<------><------>/* Extended parseop */
 
<------><------>op = acpi_os_acquire_object(acpi_gbl_ps_node_ext_cache);
<------>}
 
<------>/* Initialize the Op */
 
<------>if (op) {
<------><------>acpi_ps_init_op(op, opcode);
<------><------>op->common.aml = aml;
<------><------>op->common.flags = flags;
<------><------>ASL_CV_CLEAR_OP_COMMENTS(op);
 
<------><------>if (opcode == AML_SCOPE_OP) {
<------><------><------>acpi_gbl_current_scope = op;
<------><------>}
 
<------><------>if (acpi_gbl_capture_comments) {
<------><------><------>ASL_CV_TRANSFER_COMMENTS(op);
<------><------>}
<------>}
 
<------>return (op);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ps_free_op
 *
 * PARAMETERS:  op              - Op to be freed
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
 *              or actually free it.
 *
 ******************************************************************************/
 
void acpi_ps_free_op(union acpi_parse_object *op)
{
<------>ACPI_FUNCTION_NAME(ps_free_op);
 
<------>ASL_CV_CLEAR_OP_COMMENTS(op);
<------>if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
<------><------>ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
<------><------><------><------>  "Free retval op: %p\n", op));
<------>}
 
<------>if (op->common.flags & ACPI_PARSEOP_GENERIC) {
<------><------>(void)acpi_os_release_object(acpi_gbl_ps_node_cache, op);
<------>} else {
<------><------>(void)acpi_os_release_object(acpi_gbl_ps_node_ext_cache, op);
<------>}
}
 
/*******************************************************************************
 *
 * FUNCTION:    Utility functions
 *
 * DESCRIPTION: Low level character and object functions
 *
 ******************************************************************************/
 
/*
 * Is "c" a namestring lead character?
 */
u8 acpi_ps_is_leading_char(u32 c)
{
<------>return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));
}
 
/*
 * Get op's name (4-byte name segment) or 0 if unnamed
 */
u32 acpi_ps_get_name(union acpi_parse_object * op)
{
 
<------>/* The "generic" object has no name associated with it */
 
<------>if (op->common.flags & ACPI_PARSEOP_GENERIC) {
<------><------>return (0);
<------>}
 
<------>/* Only the "Extended" parse objects have a name */
 
<------>return (op->named.name);
}
 
/*
 * Set op's name
 */
void acpi_ps_set_name(union acpi_parse_object *op, u32 name)
{
 
<------>/* The "generic" object has no name associated with it */
 
<------>if (op->common.flags & ACPI_PARSEOP_GENERIC) {
<------><------>return;
<------>}
 
<------>op->named.name = name;
}