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path: root/drivers/acpi/acpica/nsutils.c
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Diffstat (limited to 'drivers/acpi/acpica/nsutils.c')
-rw-r--r--drivers/acpi/acpica/nsutils.c88
1 files changed, 29 insertions, 59 deletions
diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
index b5b4cb72a8a8..686420df684f 100644
--- a/drivers/acpi/acpica/nsutils.c
+++ b/drivers/acpi/acpica/nsutils.c
@@ -6,7 +6,7 @@
*****************************************************************************/
/*
- * Copyright (C) 2000 - 2012, Intel Corp.
+ * Copyright (C) 2000 - 2013, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -46,14 +46,11 @@
#include "accommon.h"
#include "acnamesp.h"
#include "amlcode.h"
-#include "actables.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nsutils")
/* Local prototypes */
-static u8 acpi_ns_valid_path_separator(char sep);
-
#ifdef ACPI_OBSOLETE_FUNCTIONS
acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search);
#endif
@@ -99,42 +96,6 @@ acpi_ns_print_node_pathname(struct acpi_namespace_node *node,
/*******************************************************************************
*
- * FUNCTION: acpi_ns_valid_root_prefix
- *
- * PARAMETERS: prefix - Character to be checked
- *
- * RETURN: TRUE if a valid prefix
- *
- * DESCRIPTION: Check if a character is a valid ACPI Root prefix
- *
- ******************************************************************************/
-
-u8 acpi_ns_valid_root_prefix(char prefix)
-{
-
- return ((u8) (prefix == '\\'));
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ns_valid_path_separator
- *
- * PARAMETERS: sep - Character to be checked
- *
- * RETURN: TRUE if a valid path separator
- *
- * DESCRIPTION: Check if a character is a valid ACPI path separator
- *
- ******************************************************************************/
-
-static u8 acpi_ns_valid_path_separator(char sep)
-{
-
- return ((u8) (sep == '.'));
-}
-
-/*******************************************************************************
- *
* FUNCTION: acpi_ns_get_type
*
* PARAMETERS: node - Parent Node to be examined
@@ -151,10 +112,10 @@ acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
if (!node) {
ACPI_WARNING((AE_INFO, "Null Node parameter"));
- return_UINT32(ACPI_TYPE_ANY);
+ return_VALUE(ACPI_TYPE_ANY);
}
- return_UINT32((acpi_object_type) node->type);
+ return_VALUE(node->type);
}
/*******************************************************************************
@@ -179,10 +140,10 @@ u32 acpi_ns_local(acpi_object_type type)
/* Type code out of range */
ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
- return_UINT32(ACPI_NS_NORMAL);
+ return_VALUE(ACPI_NS_NORMAL);
}
- return_UINT32((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
+ return_VALUE(acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
}
/*******************************************************************************
@@ -218,19 +179,19 @@ void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info)
*
* strlen() + 1 covers the first name_seg, which has no path separator
*/
- if (acpi_ns_valid_root_prefix(*next_external_char)) {
+ if (ACPI_IS_ROOT_PREFIX(*next_external_char)) {
info->fully_qualified = TRUE;
next_external_char++;
/* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */
- while (acpi_ns_valid_root_prefix(*next_external_char)) {
+ while (ACPI_IS_ROOT_PREFIX(*next_external_char)) {
next_external_char++;
}
} else {
/* Handle Carat prefixes */
- while (*next_external_char == '^') {
+ while (ACPI_IS_PARENT_PREFIX(*next_external_char)) {
info->num_carats++;
next_external_char++;
}
@@ -244,7 +205,7 @@ void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info)
if (*next_external_char) {
info->num_segments = 1;
for (i = 0; next_external_char[i]; i++) {
- if (acpi_ns_valid_path_separator(next_external_char[i])) {
+ if (ACPI_IS_PATH_SEPARATOR(next_external_char[i])) {
info->num_segments++;
}
}
@@ -282,7 +243,7 @@ acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
/* Setup the correct prefixes, counts, and pointers */
if (info->fully_qualified) {
- internal_name[0] = '\\';
+ internal_name[0] = AML_ROOT_PREFIX;
if (num_segments <= 1) {
result = &internal_name[1];
@@ -302,7 +263,7 @@ acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
i = 0;
if (info->num_carats) {
for (i = 0; i < info->num_carats; i++) {
- internal_name[i] = '^';
+ internal_name[i] = AML_PARENT_PREFIX;
}
}
@@ -322,7 +283,7 @@ acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
for (; num_segments; num_segments--) {
for (i = 0; i < ACPI_NAME_SIZE; i++) {
- if (acpi_ns_valid_path_separator(*external_name) ||
+ if (ACPI_IS_PATH_SEPARATOR(*external_name) ||
(*external_name == 0)) {
/* Pad the segment with underscore(s) if segment is short */
@@ -339,7 +300,7 @@ acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
/* Now we must have a path separator, or the pathname is bad */
- if (!acpi_ns_valid_path_separator(*external_name) &&
+ if (!ACPI_IS_PATH_SEPARATOR(*external_name) &&
(*external_name != 0)) {
return_ACPI_STATUS(AE_BAD_PATHNAME);
}
@@ -457,13 +418,13 @@ acpi_ns_externalize_name(u32 internal_name_length,
/* Check for a prefix (one '\' | one or more '^') */
switch (internal_name[0]) {
- case '\\':
+ case AML_ROOT_PREFIX:
prefix_length = 1;
break;
- case '^':
+ case AML_PARENT_PREFIX:
for (i = 0; i < internal_name_length; i++) {
- if (internal_name[i] == '^') {
+ if (ACPI_IS_PARENT_PREFIX(internal_name[i])) {
prefix_length = i + 1;
} else {
break;
@@ -664,17 +625,17 @@ void acpi_ns_terminate(void)
u32 acpi_ns_opens_scope(acpi_object_type type)
{
- ACPI_FUNCTION_TRACE_STR(ns_opens_scope, acpi_ut_get_type_name(type));
+ ACPI_FUNCTION_ENTRY();
- if (!acpi_ut_valid_object_type(type)) {
+ if (type > ACPI_TYPE_LOCAL_MAX) {
/* type code out of range */
ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
- return_UINT32(ACPI_NS_NORMAL);
+ return (ACPI_NS_NORMAL);
}
- return_UINT32(((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
+ return (((u32)acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
}
/*******************************************************************************
@@ -710,6 +671,8 @@ acpi_ns_get_node(struct acpi_namespace_node *prefix_node,
ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname));
+ /* Simplest case is a null pathname */
+
if (!pathname) {
*return_node = prefix_node;
if (!prefix_node) {
@@ -718,6 +681,13 @@ acpi_ns_get_node(struct acpi_namespace_node *prefix_node,
return_ACPI_STATUS(AE_OK);
}
+ /* Quick check for a reference to the root */
+
+ if (ACPI_IS_ROOT_PREFIX(pathname[0]) && (!pathname[1])) {
+ *return_node = acpi_gbl_root_node;
+ return_ACPI_STATUS(AE_OK);
+ }
+
/* Convert path to internal representation */
status = acpi_ns_internalize_name(pathname, &internal_path);
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