1 files changed, 290 insertions, 0 deletions
diff --git a/source/components/parser/psutils.c b/source/components/parser/psutils.c
new file mode 100644
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+++ b/source/components/parser/psutils.c
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+/******************************************************************************
+ *
+ * Module Name: psutils - Parser miscellaneous utilities (Parser only)
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * 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.h"
+#include "accommon.h"
+#include "acparser.h"
+#include "amlcode.h"
+
+#define _COMPONENT          ACPI_PARSER
+        ACPI_MODULE_NAME    ("psutils")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiPsCreateScopeOp
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      A new Scope object, null on failure
+ *
+ * DESCRIPTION: Create a Scope and associated namepath op with the root name
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+AcpiPsCreateScopeOp (
+    void)
+{
+    ACPI_PARSE_OBJECT       *ScopeOp;
+
+
+    ScopeOp = AcpiPsAllocOp (AML_SCOPE_OP);
+    if (!ScopeOp)
+    {
+        return (NULL);
+    }
+
+    ScopeOp->Named.Name = ACPI_ROOT_NAME;
+    return (ScopeOp);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiPsInitOp
+ *
+ * PARAMETERS:  Op              - A newly allocated Op object
+ *              Opcode          - Opcode to store in the Op
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Initialize a parse (Op) object
+ *
+ ******************************************************************************/
+
+void
+AcpiPsInitOp (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT16                  Opcode)
+{
+    ACPI_FUNCTION_ENTRY ();
+
+
+    Op->Common.DescriptorType = ACPI_DESC_TYPE_PARSER;
+    Op->Common.AmlOpcode = Opcode;
+
+    ACPI_DISASM_ONLY_MEMBERS (ACPI_STRNCPY (Op->Common.AmlOpName,
+            (AcpiPsGetOpcodeInfo (Opcode))->Name,
+                sizeof (Op->Common.AmlOpName)));
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiPsAllocOp
+ *
+ * PARAMETERS:  Opcode          - Opcode that will be stored in the new Op
+ *
+ * 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.
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT*
+AcpiPsAllocOp (
+    UINT16                  Opcode)
+{
+    ACPI_PARSE_OBJECT       *Op;
+    const ACPI_OPCODE_INFO  *OpInfo;
+    UINT8                   Flags = ACPI_PARSEOP_GENERIC;
+
+
+    ACPI_FUNCTION_ENTRY ();
+
+
+    OpInfo = AcpiPsGetOpcodeInfo (Opcode);
+
+    /* Determine type of ParseOp required */
+
+    if (OpInfo->Flags & AML_DEFER)
+    {
+        Flags = ACPI_PARSEOP_DEFERRED;
+    }
+    else if (OpInfo->Flags & AML_NAMED)
+    {
+        Flags = ACPI_PARSEOP_NAMED;
+    }
+    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 = AcpiOsAcquireObject (AcpiGbl_PsNodeCache);
+    }
+    else
+    {
+        /* Extended parseop */
+
+        Op = AcpiOsAcquireObject (AcpiGbl_PsNodeExtCache);
+    }
+
+    /* Initialize the Op */
+
+    if (Op)
+    {
+        AcpiPsInitOp (Op, Opcode);
+        Op->Common.Flags = Flags;
+    }
+
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiPsFreeOp
+ *
+ * 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
+AcpiPsFreeOp (
+    ACPI_PARSE_OBJECT       *Op)
+{
+    ACPI_FUNCTION_NAME (PsFreeOp);
+
+
+    if (Op->Common.AmlOpcode == 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) AcpiOsReleaseObject (AcpiGbl_PsNodeCache, Op);
+    }
+    else
+    {
+        (void) AcpiOsReleaseObject (AcpiGbl_PsNodeExtCache, Op);
+    }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Utility functions
+ *
+ * DESCRIPTION: Low level character and object functions
+ *
+ ******************************************************************************/
+
+
+/*
+ * Is "c" a namestring lead character?
+ */
+BOOLEAN
+AcpiPsIsLeadingChar (
+    UINT32                  c)
+{
+    return ((BOOLEAN) (c == '_' || (c >= 'A' && c <= 'Z')));
+}
+
+
+/*
+ * Is "c" a namestring prefix character?
+ */
+BOOLEAN
+AcpiPsIsPrefixChar (
+    UINT32                  c)
+{
+    return ((BOOLEAN) (c == '\\' || c == '^'));
+}
+
+
+/*
+ * Get op's name (4-byte name segment) or 0 if unnamed
+ */
+UINT32
+AcpiPsGetName (
+    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
+AcpiPsSetName (
+    ACPI_PARSE_OBJECT       *Op,
+    UINT32                  name)
+{
+
+    /* The "generic" object has no name associated with it */
+
+    if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
+    {
+        return;
+    }
+
+    Op->Named.Name = name;
+}
+