*****************************************************************************/
/*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* POSSIBILITY OF SUCH DAMAGES.
*/
-
#include <acpi/acpi.h>
#include <acpi/acinterp.h>
#include <acpi/amlcode.h>
#define _COMPONENT ACPI_EXECUTER
- ACPI_MODULE_NAME ("exnames")
-
-
-/* AML Package Length encodings */
+ACPI_MODULE_NAME("exnames")
-#define ACPI_AML_PACKAGE_TYPE1 0x40
-#define ACPI_AML_PACKAGE_TYPE2 0x4000
-#define ACPI_AML_PACKAGE_TYPE3 0x400000
-#define ACPI_AML_PACKAGE_TYPE4 0x40000000
+/* Local prototypes */
+static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs);
+static acpi_status
+acpi_ex_name_segment(u8 ** in_aml_address, char *name_string);
/*******************************************************************************
*
* FUNCTION: acpi_ex_allocate_name_string
*
* PARAMETERS: prefix_count - Count of parent levels. Special cases:
- * (-1) = root, 0 = none
+ * (-1)==root, 0==none
* num_name_segs - count of 4-character name segments
*
* RETURN: A pointer to the allocated string segment. This segment must
*
******************************************************************************/
-char *
-acpi_ex_allocate_name_string (
- u32 prefix_count,
- u32 num_name_segs)
+static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs)
{
- char *temp_ptr;
- char *name_string;
- u32 size_needed;
-
- ACPI_FUNCTION_TRACE ("ex_allocate_name_string");
+ char *temp_ptr;
+ char *name_string;
+ u32 size_needed;
+ ACPI_FUNCTION_TRACE("ex_allocate_name_string");
/*
- * Allow room for all \ and ^ prefixes, all segments, and a multi_name_prefix.
+ * Allow room for all \ and ^ prefixes, all segments and a multi_name_prefix.
* Also, one byte for the null terminator.
* This may actually be somewhat longer than needed.
*/
/* Special case for root */
size_needed = 1 + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1;
- }
- else {
- size_needed = prefix_count + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1;
+ } else {
+ size_needed =
+ prefix_count + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1;
}
/*
* Allocate a buffer for the name.
* This buffer must be deleted by the caller!
*/
- name_string = ACPI_MEM_ALLOCATE (size_needed);
+ name_string = ACPI_MEM_ALLOCATE(size_needed);
if (!name_string) {
- ACPI_REPORT_ERROR (("ex_allocate_name_string: Could not allocate size %d\n", size_needed));
- return_PTR (NULL);
+ ACPI_ERROR((AE_INFO,
+ "Could not allocate size %d", size_needed));
+ return_PTR(NULL);
}
temp_ptr = name_string;
if (prefix_count == ACPI_UINT32_MAX) {
*temp_ptr++ = AML_ROOT_PREFIX;
- }
- else {
+ } else {
while (prefix_count--) {
*temp_ptr++ = AML_PARENT_PREFIX;
}
}
-
/* Set up Dual or Multi prefixes if needed */
if (num_name_segs > 2) {
/* Set up multi prefixes */
*temp_ptr++ = AML_MULTI_NAME_PREFIX_OP;
- *temp_ptr++ = (char) num_name_segs;
- }
- else if (2 == num_name_segs) {
+ *temp_ptr++ = (char)num_name_segs;
+ } else if (2 == num_name_segs) {
/* Set up dual prefixes */
*temp_ptr++ = AML_DUAL_NAME_PREFIX;
*/
*temp_ptr = 0;
- return_PTR (name_string);
+ return_PTR(name_string);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_name_segment
*
- * PARAMETERS: interpreter_mode - Current running mode (load1/Load2/Exec)
+ * PARAMETERS: in_aml_address - Pointer to the name in the AML code
+ * name_string - Where to return the name. The name is appended
+ * to any existing string to form a namepath
*
* RETURN: Status
*
- * DESCRIPTION: Execute a name segment (4 bytes)
+ * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream
*
******************************************************************************/
-acpi_status
-acpi_ex_name_segment (
- u8 **in_aml_address,
- char *name_string)
+static acpi_status acpi_ex_name_segment(u8 ** in_aml_address, char *name_string)
{
- char *aml_address = (void *) *in_aml_address;
- acpi_status status = AE_OK;
- u32 index;
- char char_buf[5];
-
-
- ACPI_FUNCTION_TRACE ("ex_name_segment");
+ char *aml_address = (void *)*in_aml_address;
+ acpi_status status = AE_OK;
+ u32 index;
+ char char_buf[5];
+ ACPI_FUNCTION_TRACE("ex_name_segment");
/*
* If first character is a digit, then we know that we aren't looking at a
char_buf[0] = *aml_address;
if ('0' <= char_buf[0] && char_buf[0] <= '9') {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "leading digit: %c\n", char_buf[0]));
- return_ACPI_STATUS (AE_CTRL_PENDING);
+ ACPI_ERROR((AE_INFO, "Invalid leading digit: %c", char_buf[0]));
+ return_ACPI_STATUS(AE_CTRL_PENDING);
}
- ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Bytes from stream:\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Bytes from stream:\n"));
for (index = 0;
- (index < ACPI_NAME_SIZE) && (acpi_ut_valid_acpi_character (*aml_address));
- index++) {
+ (index < ACPI_NAME_SIZE)
+ && (acpi_ut_valid_acpi_character(*aml_address)); index++) {
char_buf[index] = *aml_address++;
- ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "%c\n", char_buf[index]));
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "%c\n", char_buf[index]));
}
-
/* Valid name segment */
if (index == 4) {
char_buf[4] = '\0';
if (name_string) {
- ACPI_STRCAT (name_string, char_buf);
- ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
- "Appended to - %s \n", name_string));
- }
- else {
- ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
- "No Name string - %s \n", char_buf));
+ ACPI_STRCAT(name_string, char_buf);
+ ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
+ "Appended to - %s\n", name_string));
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
+ "No Name string - %s\n", char_buf));
}
- }
- else if (index == 0) {
+ } else if (index == 0) {
/*
* First character was not a valid name character,
* so we are looking at something other than a name.
*/
- ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Leading character is not alpha: %02Xh (not a name)\n",
- char_buf[0]));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Leading character is not alpha: %02Xh (not a name)\n",
+ char_buf[0]));
status = AE_CTRL_PENDING;
- }
- else {
- /* Segment started with one or more valid characters, but fewer than 4 */
-
+ } else {
+ /*
+ * Segment started with one or more valid characters, but fewer than
+ * the required 4
+ */
status = AE_AML_BAD_NAME;
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad character %02x in name, at %p\n",
- *aml_address, aml_address));
+ ACPI_ERROR((AE_INFO,
+ "Bad character %02x in name, at %p",
+ *aml_address, aml_address));
}
- *in_aml_address = (u8 *) aml_address;
- return_ACPI_STATUS (status);
+ *in_aml_address = ACPI_CAST_PTR(u8, aml_address);
+ return_ACPI_STATUS(status);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_get_name_string
*
- * PARAMETERS: data_type - Data type to be associated with this name
+ * PARAMETERS: data_type - Object type to be associated with this
+ * name
+ * in_aml_address - Pointer to the namestring in the AML code
+ * out_name_string - Where the namestring is returned
+ * out_name_length - Length of the returned string
*
- * RETURN: Status
+ * RETURN: Status, namestring and length
*
- * DESCRIPTION: Get a name, including any prefixes.
+ * DESCRIPTION: Extract a full namepath from the AML byte stream,
+ * including any prefixes.
*
******************************************************************************/
acpi_status
-acpi_ex_get_name_string (
- acpi_object_type data_type,
- u8 *in_aml_address,
- char **out_name_string,
- u32 *out_name_length)
+acpi_ex_get_name_string(acpi_object_type data_type,
+ u8 * in_aml_address,
+ char **out_name_string, u32 * out_name_length)
{
- acpi_status status = AE_OK;
- u8 *aml_address = in_aml_address;
- char *name_string = NULL;
- u32 num_segments;
- u32 prefix_count = 0;
- u8 has_prefix = FALSE;
-
-
- ACPI_FUNCTION_TRACE_PTR ("ex_get_name_string", aml_address);
-
-
- if (ACPI_TYPE_LOCAL_REGION_FIELD == data_type ||
- ACPI_TYPE_LOCAL_BANK_FIELD == data_type ||
- ACPI_TYPE_LOCAL_INDEX_FIELD == data_type) {
+ acpi_status status = AE_OK;
+ u8 *aml_address = in_aml_address;
+ char *name_string = NULL;
+ u32 num_segments;
+ u32 prefix_count = 0;
+ u8 has_prefix = FALSE;
+
+ ACPI_FUNCTION_TRACE_PTR("ex_get_name_string", aml_address);
+
+ if (ACPI_TYPE_LOCAL_REGION_FIELD == data_type ||
+ ACPI_TYPE_LOCAL_BANK_FIELD == data_type ||
+ ACPI_TYPE_LOCAL_INDEX_FIELD == data_type) {
/* Disallow prefixes for types associated with field_unit names */
- name_string = acpi_ex_allocate_name_string (0, 1);
+ name_string = acpi_ex_allocate_name_string(0, 1);
if (!name_string) {
status = AE_NO_MEMORY;
+ } else {
+ status =
+ acpi_ex_name_segment(&aml_address, name_string);
}
- else {
- status = acpi_ex_name_segment (&aml_address, name_string);
- }
- }
- else {
+ } else {
/*
* data_type is not a field name.
* Examine first character of name for root or parent prefix operators
switch (*aml_address) {
case AML_ROOT_PREFIX:
- ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "root_prefix(\\) at %p\n", aml_address));
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+ "root_prefix(\\) at %p\n",
+ aml_address));
/*
* Remember that we have a root_prefix --
has_prefix = TRUE;
break;
-
case AML_PARENT_PREFIX:
/* Increment past possibly multiple parent prefixes */
do {
- ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "parent_prefix (^) at %p\n", aml_address));
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+ "parent_prefix (^) at %p\n",
+ aml_address));
aml_address++;
prefix_count++;
has_prefix = TRUE;
break;
-
default:
/* Not a prefix character */
break;
}
-
/* Examine first character of name for name segment prefix operator */
switch (*aml_address) {
case AML_DUAL_NAME_PREFIX:
- ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "dual_name_prefix at %p\n", aml_address));
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+ "dual_name_prefix at %p\n",
+ aml_address));
aml_address++;
- name_string = acpi_ex_allocate_name_string (prefix_count, 2);
+ name_string =
+ acpi_ex_allocate_name_string(prefix_count, 2);
if (!name_string) {
status = AE_NO_MEMORY;
break;
has_prefix = TRUE;
- status = acpi_ex_name_segment (&aml_address, name_string);
- if (ACPI_SUCCESS (status)) {
- status = acpi_ex_name_segment (&aml_address, name_string);
+ status =
+ acpi_ex_name_segment(&aml_address, name_string);
+ if (ACPI_SUCCESS(status)) {
+ status =
+ acpi_ex_name_segment(&aml_address,
+ name_string);
}
break;
-
case AML_MULTI_NAME_PREFIX_OP:
- ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "multi_name_prefix at %p\n", aml_address));
+ ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
+ "multi_name_prefix at %p\n",
+ aml_address));
/* Fetch count of segments remaining in name path */
aml_address++;
num_segments = *aml_address;
- name_string = acpi_ex_allocate_name_string (prefix_count, num_segments);
+ name_string =
+ acpi_ex_allocate_name_string(prefix_count,
+ num_segments);
if (!name_string) {
status = AE_NO_MEMORY;
break;
has_prefix = TRUE;
while (num_segments &&
- (status = acpi_ex_name_segment (&aml_address, name_string)) == AE_OK) {
+ (status =
+ acpi_ex_name_segment(&aml_address,
+ name_string)) == AE_OK) {
num_segments--;
}
break;
-
case 0:
/* null_name valid as of 8-12-98 ASL/AML Grammar Update */
if (prefix_count == ACPI_UINT32_MAX) {
- ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "name_seg is \"\\\" followed by NULL\n"));
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "name_seg is \"\\\" followed by NULL\n"));
}
/* Consume the NULL byte */
aml_address++;
- name_string = acpi_ex_allocate_name_string (prefix_count, 0);
+ name_string =
+ acpi_ex_allocate_name_string(prefix_count, 0);
if (!name_string) {
status = AE_NO_MEMORY;
break;
break;
-
default:
/* Name segment string */
- name_string = acpi_ex_allocate_name_string (prefix_count, 1);
+ name_string =
+ acpi_ex_allocate_name_string(prefix_count, 1);
if (!name_string) {
status = AE_NO_MEMORY;
break;
}
- status = acpi_ex_name_segment (&aml_address, name_string);
+ status =
+ acpi_ex_name_segment(&aml_address, name_string);
break;
}
}
if (AE_CTRL_PENDING == status && has_prefix) {
/* Ran out of segments after processing a prefix */
- ACPI_REPORT_ERROR (
- ("ex_do_name: Malformed Name at %p\n", name_string));
+ ACPI_ERROR((AE_INFO, "Malformed Name at %p", name_string));
status = AE_AML_BAD_NAME;
}
+ if (ACPI_FAILURE(status)) {
+ if (name_string) {
+ ACPI_MEM_FREE(name_string);
+ }
+ return_ACPI_STATUS(status);
+ }
+
*out_name_string = name_string;
*out_name_length = (u32) (aml_address - in_aml_address);
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
-
-
git://git.onelab.eu / linux-2.6.git / blobdiff