acpi_status
acpi_tb_get_this_table (
struct acpi_pointer *address,
struct acpi_table_header *header,
struct acpi_table_desc *table_info)
{
struct acpi_table_header *full_table = NULL;
u8 allocation;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE ("tb_get_this_table");
/*
* Flags contains the current processor mode (Virtual or Physical addressing)
* The pointer_type is either Logical or Physical
*/
switch (address->pointer_type) {
case ACPI_PHYSMODE_PHYSPTR:
case ACPI_LOGMODE_LOGPTR:
/* Pointer matches processor mode, copy the table to a new buffer */
full_table = ACPI_MEM_ALLOCATE (header->length);
if (!full_table) {
ACPI_REPORT_ERROR (("Could not allocate table memory for [%4.4s] length %X\n",
header->signature, header->length));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the entire table (including header) to the local buffer */
ACPI_MEMCPY (full_table, address->pointer.logical, header->length);
/* Save allocation type */
allocation = ACPI_MEM_ALLOCATED;
break;
case ACPI_LOGMODE_PHYSPTR:
/*
* Just map the table's physical memory
* into our address space.
*/
status = acpi_os_map_memory (address->pointer.physical, (acpi_size) header->length,
(void *) &full_table);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("Could not map memory for table [%4.4s] at %8.8X%8.8X for length %X\n",
header->signature,
ACPI_FORMAT_UINT64 (address->pointer.physical), header->length));
return (status);
}
/* Save allocation type */
allocation = ACPI_MEM_MAPPED;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid address flags %X\n",
address->pointer_type));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Validate checksum for _most_ tables,
* even the ones whose signature we don't recognize
*/
if (table_info->type != ACPI_TABLE_FACS) {
status = acpi_tb_verify_table_checksum (full_table);
#if (!ACPI_CHECKSUM_ABORT)
if (ACPI_FAILURE (status)) {
/* Ignore the error if configuration says so */
status = AE_OK;
}
#endif
}
/* Return values */
table_info->pointer = full_table;
table_info->length = (acpi_size) header->length;
table_info->allocation = allocation;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Found table [%4.4s] at %8.8X%8.8X, mapped/copied to %p\n",
full_table->signature,
ACPI_FORMAT_UINT64 (address->pointer.physical), full_table));
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_store_buffer_to_buffer
*
* PARAMETERS: source_desc - Source object to copy
* target_desc - Destination object of the copy
*
* RETURN: Status
*
* DESCRIPTION: Copy a buffer object to another buffer object.
*
******************************************************************************/
acpi_status
acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc,
union acpi_operand_object *target_desc)
{
u32 length;
u8 *buffer;
ACPI_FUNCTION_TRACE_PTR("ex_store_buffer_to_buffer", source_desc);
/* We know that source_desc is a buffer by now */
buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer);
length = source_desc->buffer.length;
/*
* If target is a buffer of length zero or is a static buffer,
* allocate a new buffer of the proper length
*/
if ((target_desc->buffer.length == 0) ||
(target_desc->common.flags & AOPOBJ_STATIC_POINTER)) {
target_desc->buffer.pointer = ACPI_MEM_ALLOCATE(length);
if (!target_desc->buffer.pointer) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
target_desc->buffer.length = length;
}
/* Copy source buffer to target buffer */
if (length <= target_desc->buffer.length) {
/* Clear existing buffer and copy in the new one */
ACPI_MEMSET(target_desc->buffer.pointer, 0,
target_desc->buffer.length);
ACPI_MEMCPY(target_desc->buffer.pointer, buffer, length);
#ifdef ACPI_OBSOLETE_BEHAVIOR
/*
* NOTE: ACPI versions up to 3.0 specified that the buffer must be
* truncated if the string is smaller than the buffer. However, "other"
* implementations of ACPI never did this and thus became the defacto
* standard. ACPi 3.0_a changes this behavior such that the buffer
* is no longer truncated.
*/
/*
* OBSOLETE BEHAVIOR:
* If the original source was a string, we must truncate the buffer,
* according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
* copy must not truncate the original buffer.
*/
if (original_src_type == ACPI_TYPE_STRING) {
/* Set the new length of the target */
target_desc->buffer.length = length;
}
#endif
} else {
/* Truncate the source, copy only what will fit */
ACPI_MEMCPY(target_desc->buffer.pointer, buffer,
target_desc->buffer.length);
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Truncating source buffer from %X to %X\n",
length, target_desc->buffer.length));
}
/* Copy flags */
target_desc->buffer.flags = source_desc->buffer.flags;
target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
return_ACPI_STATUS(AE_OK);
}
acpi_status
acpi_get_firmware_table(acpi_string signature,
u32 instance,
u32 flags, struct acpi_table_header **table_pointer)
{
acpi_status status;
struct acpi_pointer address;
struct acpi_table_header *header = NULL;
struct acpi_table_desc *table_info = NULL;
struct acpi_table_desc *rsdt_info;
u32 table_count;
u32 i;
u32 j;
ACPI_FUNCTION_TRACE("acpi_get_firmware_table");
/*
* Ensure that at least the table manager is initialized. We don't
* require that the entire ACPI subsystem is up for this interface.
* If we have a buffer, we must have a length too
*/
if ((instance == 0) || (!signature) || (!table_pointer)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Ensure that we have a RSDP */
if (!acpi_gbl_RSDP) {
/* Get the RSDP */
status = acpi_os_get_root_pointer(flags, &address);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "RSDP not found\n"));
return_ACPI_STATUS(AE_NO_ACPI_TABLES);
}
/* Map and validate the RSDP */
if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
status = acpi_os_map_memory(address.pointer.physical,
sizeof(struct
rsdp_descriptor),
(void *)&acpi_gbl_RSDP);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
acpi_gbl_RSDP = address.pointer.logical;
}
/* The RDSP signature and checksum must both be correct */
status = acpi_tb_validate_rsdp(acpi_gbl_RSDP);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* Get the RSDT address via the RSDP */
acpi_tb_get_rsdt_address(&address);
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
acpi_gbl_RSDP,
ACPI_FORMAT_UINT64(address.pointer.value)));
/* Insert processor_mode flags */
address.pointer_type |= flags;
/* Get and validate the RSDT */
rsdt_info = ACPI_MEM_CALLOCATE(sizeof(struct acpi_table_desc));
if (!rsdt_info) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
status = acpi_tb_get_table(&address, rsdt_info);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
status = acpi_tb_validate_rsdt(rsdt_info->pointer);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/* Allocate a scratch table header and table descriptor */
header = ACPI_MEM_ALLOCATE(sizeof(struct acpi_table_header));
if (!header) {
status = AE_NO_MEMORY;
goto cleanup;
}
table_info = ACPI_MEM_ALLOCATE(sizeof(struct acpi_table_desc));
if (!table_info) {
status = AE_NO_MEMORY;
goto cleanup;
}
/* Get the number of table pointers within the RSDT */
table_count =
acpi_tb_get_table_count(acpi_gbl_RSDP, rsdt_info->pointer);
address.pointer_type = acpi_gbl_table_flags | flags;
/*
* Search the RSDT/XSDT for the correct instance of the
* requested table
*/
for (i = 0, j = 0; i < table_count; i++) {
/*
* Get the next table pointer, handle RSDT vs. XSDT
* RSDT pointers are 32 bits, XSDT pointers are 64 bits
*/
if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
address.pointer.value =
(ACPI_CAST_PTR
(RSDT_DESCRIPTOR,
rsdt_info->pointer))->table_offset_entry[i];
} else {
address.pointer.value =
(ACPI_CAST_PTR
(XSDT_DESCRIPTOR,
rsdt_info->pointer))->table_offset_entry[i];
}
/* Get the table header */
status = acpi_tb_get_table_header(&address, header);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/* Compare table signatures and table instance */
if (!ACPI_STRNCMP(header->signature, signature, ACPI_NAME_SIZE)) {
/* An instance of the table was found */
j++;
if (j >= instance) {
/* Found the correct instance, get the entire table */
status =
acpi_tb_get_table_body(&address, header,
table_info);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
*table_pointer = table_info->pointer;
goto cleanup;
}
}
}
/* Did not find the table */
status = AE_NOT_EXIST;
cleanup:
if (rsdt_info->pointer) {
acpi_os_unmap_memory(rsdt_info->pointer,
(acpi_size) rsdt_info->pointer->length);
}
ACPI_MEM_FREE(rsdt_info);
if (header) {
ACPI_MEM_FREE(header);
}
if (table_info) {
ACPI_MEM_FREE(table_info);
}
return_ACPI_STATUS(status);
}
acpi_status
acpi_hw_initialize (
void)
{
acpi_status status = AE_OK;
u32 index;
FUNCTION_TRACE ("Hw_initialize");
/* We must have the ACPI tables by the time we get here */
if (!acpi_gbl_FADT) {
acpi_gbl_restore_acpi_chipset = FALSE;
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No FADT!\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Identify current ACPI/legacy mode */
switch (acpi_gbl_system_flags & SYS_MODES_MASK) {
case (SYS_MODE_ACPI):
acpi_gbl_original_mode = SYS_MODE_ACPI;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "System supports ACPI mode only.\n"));
break;
case (SYS_MODE_LEGACY):
acpi_gbl_original_mode = SYS_MODE_LEGACY;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Tables loaded from buffer, hardware assumed to support LEGACY mode only.\n"));
break;
case (SYS_MODE_ACPI | SYS_MODE_LEGACY):
if (acpi_hw_get_mode () == SYS_MODE_ACPI) {
acpi_gbl_original_mode = SYS_MODE_ACPI;
}
else {
acpi_gbl_original_mode = SYS_MODE_LEGACY;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System supports both ACPI and LEGACY modes.\n"));
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"System is currently in %s mode.\n",
(acpi_gbl_original_mode == SYS_MODE_ACPI) ? "ACPI" : "LEGACY"));
break;
}
if (acpi_gbl_system_flags & SYS_MODE_ACPI) {
/* Target system supports ACPI mode */
/*
* The purpose of this code is to save the initial state
* of the ACPI event enable registers. An exit function will be
* registered which will restore this state when the application
* exits. The exit function will also clear all of the ACPI event
* status bits prior to restoring the original mode.
*
* The location of the PM1a_evt_blk enable registers is defined as the
* base of PM1a_evt_blk + DIV_2(PM1a_evt_blk_length). Since the spec further
* fully defines the PM1a_evt_blk to be a total of 4 bytes, the offset
* for the enable registers is always 2 from the base. It is hard
* coded here. If this changes in the spec, this code will need to
* be modified. The PM1b_evt_blk behaves as expected.
*/
acpi_gbl_pm1_enable_register_save = (u16) acpi_hw_register_read (
ACPI_MTX_LOCK, PM1_EN);
/*
* The GPEs behave similarly, except that the length of the register
* block is not fixed, so the buffer must be allocated with malloc
*/
if (ACPI_VALID_ADDRESS (acpi_gbl_FADT->Xgpe0blk.address) &&
acpi_gbl_FADT->gpe0blk_len) {
/* GPE0 specified in FADT */
acpi_gbl_gpe0enable_register_save = ACPI_MEM_ALLOCATE (
DIV_2 (acpi_gbl_FADT->gpe0blk_len));
if (!acpi_gbl_gpe0enable_register_save) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save state of GPE0 enable bits */
for (index = 0; index < DIV_2 (acpi_gbl_FADT->gpe0blk_len); index++) {
acpi_gbl_gpe0enable_register_save[index] =
(u8) acpi_hw_register_read (ACPI_MTX_LOCK, GPE0_EN_BLOCK | index);
}
}
else {
acpi_gbl_gpe0enable_register_save = NULL;
}
if (ACPI_VALID_ADDRESS (acpi_gbl_FADT->Xgpe1_blk.address) &&
acpi_gbl_FADT->gpe1_blk_len) {
/* GPE1 defined */
acpi_gbl_gpe1_enable_register_save = ACPI_MEM_ALLOCATE (
DIV_2 (acpi_gbl_FADT->gpe1_blk_len));
if (!acpi_gbl_gpe1_enable_register_save) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* save state of GPE1 enable bits */
for (index = 0; index < DIV_2 (acpi_gbl_FADT->gpe1_blk_len); index++) {
acpi_gbl_gpe1_enable_register_save[index] =
(u8) acpi_hw_register_read (ACPI_MTX_LOCK, GPE1_EN_BLOCK | index);
}
}
else {
acpi_gbl_gpe1_enable_register_save = NULL;
}
}
return_ACPI_STATUS (status);
}
acpi_status
acpi_ex_store_buffer_to_buffer (
acpi_object_type original_src_type,
union acpi_operand_object *source_desc,
union acpi_operand_object *target_desc)
{
u32 length;
u8 *buffer;
ACPI_FUNCTION_TRACE_PTR ("ex_store_buffer_to_buffer", source_desc);
/*
* We know that source_desc is a buffer by now
*/
buffer = (u8 *) source_desc->buffer.pointer;
length = source_desc->buffer.length;
/*
* If target is a buffer of length zero or is a static buffer,
* allocate a new buffer of the proper length
*/
if ((target_desc->buffer.length == 0) ||
(target_desc->common.flags & AOPOBJ_STATIC_POINTER)) {
target_desc->buffer.pointer = ACPI_MEM_ALLOCATE (length);
if (!target_desc->buffer.pointer) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
target_desc->buffer.length = length;
}
/* Copy source buffer to target buffer */
if (length <= target_desc->buffer.length) {
/* Clear existing buffer and copy in the new one */
ACPI_MEMSET (target_desc->buffer.pointer, 0, target_desc->buffer.length);
ACPI_MEMCPY (target_desc->buffer.pointer, buffer, length);
/*
* If the original source was a string, we must truncate the buffer,
* according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer
* copy must not truncate the original buffer.
*/
if (original_src_type == ACPI_TYPE_STRING) {
/* Set the new length of the target */
target_desc->buffer.length = length;
}
}
else {
/* Truncate the source, copy only what will fit */
ACPI_MEMCPY (target_desc->buffer.pointer, buffer, target_desc->buffer.length);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Truncating source buffer from %X to %X\n",
length, target_desc->buffer.length));
}
/* Copy flags */
target_desc->buffer.flags = source_desc->buffer.flags;
target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiExDoConcatenate (
ACPI_OPERAND_OBJECT *ObjDesc1,
ACPI_OPERAND_OBJECT *ObjDesc2,
ACPI_OPERAND_OBJECT **ActualReturnDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_INTEGER ThisInteger;
ACPI_OPERAND_OBJECT *ReturnDesc;
NATIVE_CHAR *NewBuf;
ACPI_FUNCTION_ENTRY ();
/*
* There are three cases to handle:
*
* 1) Two Integers concatenated to produce a new Buffer
* 2) Two Strings concatenated to produce a new String
* 3) Two Buffers concatenated to produce a new Buffer
*/
switch (ACPI_GET_OBJECT_TYPE (ObjDesc1))
{
case ACPI_TYPE_INTEGER:
/* Result of two Integers is a Buffer */
/* Need enough buffer space for two integers */
ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth * 2);
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
NewBuf = (NATIVE_CHAR *) ReturnDesc->Buffer.Pointer;
/* Convert the first integer */
ThisInteger = ObjDesc1->Integer.Value;
for (i = 0; i < AcpiGbl_IntegerByteWidth; i++)
{
NewBuf[i] = (NATIVE_CHAR) ThisInteger;
ThisInteger >>= 8;
}
/* Convert the second integer */
ThisInteger = ObjDesc2->Integer.Value;
for (; i < (ACPI_MUL_2 (AcpiGbl_IntegerByteWidth)); i++)
{
NewBuf[i] = (NATIVE_CHAR) ThisInteger;
ThisInteger >>= 8;
}
break;
case ACPI_TYPE_STRING:
/* Result of two Strings is a String */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
/* Operand0 is string */
NewBuf = ACPI_MEM_ALLOCATE ((ACPI_SIZE) ObjDesc1->String.Length +
(ACPI_SIZE) ObjDesc2->String.Length + 1);
if (!NewBuf)
{
ACPI_REPORT_ERROR
(("ExDoConcatenate: String allocation failure\n"));
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Concatenate the strings */
ACPI_STRCPY (NewBuf, ObjDesc1->String.Pointer);
ACPI_STRCPY (NewBuf + ObjDesc1->String.Length,
ObjDesc2->String.Pointer);
/* Complete the String object initialization */
ReturnDesc->String.Pointer = NewBuf;
ReturnDesc->String.Length = ObjDesc1->String.Length +
ObjDesc2->String.Length;
break;
case ACPI_TYPE_BUFFER:
/* Result of two Buffers is a Buffer */
ReturnDesc = AcpiUtCreateBufferObject (
(ACPI_SIZE) ObjDesc1->Buffer.Length +
(ACPI_SIZE) ObjDesc2->Buffer.Length);
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
NewBuf = (NATIVE_CHAR *) ReturnDesc->Buffer.Pointer;
/* Concatenate the buffers */
ACPI_MEMCPY (NewBuf, ObjDesc1->Buffer.Pointer,
ObjDesc1->Buffer.Length);
ACPI_MEMCPY (NewBuf + ObjDesc1->Buffer.Length, ObjDesc2->Buffer.Pointer,
ObjDesc2->Buffer.Length);
break;
default:
/* Invalid object type, should not happen here */
Status = AE_AML_INTERNAL;
ReturnDesc = NULL;
}
*ActualReturnDesc = ReturnDesc;
return (AE_OK);
Cleanup:
AcpiUtRemoveReference (ReturnDesc);
return (Status);
}
acpi_status
acpi_ex_do_concatenate (
acpi_operand_object *obj_desc,
acpi_operand_object *obj_desc2,
acpi_operand_object **actual_return_desc,
acpi_walk_state *walk_state)
{
acpi_status status;
u32 i;
acpi_integer this_integer;
acpi_operand_object *return_desc;
NATIVE_CHAR *new_buf;
u32 integer_size = sizeof (acpi_integer);
FUNCTION_ENTRY ();
/*
* There are three cases to handle:
* 1) Two Integers concatenated to produce a buffer
* 2) Two Strings concatenated to produce a string
* 3) Two Buffers concatenated to produce a buffer
*/
switch (obj_desc->common.type) {
case ACPI_TYPE_INTEGER:
/* Handle both ACPI 1.0 and ACPI 2.0 Integer widths */
if (walk_state->method_node->flags & ANOBJ_DATA_WIDTH_32) {
/*
* We are running a method that exists in a 32-bit ACPI table.
* Truncate the value to 32 bits by zeroing out the upper
* 32-bit field
*/
integer_size = sizeof (u32);
}
/* Result of two integers is a buffer */
return_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
if (!return_desc) {
return (AE_NO_MEMORY);
}
/* Need enough space for two integers */
return_desc->buffer.length = integer_size * 2;
new_buf = ACPI_MEM_CALLOCATE (return_desc->buffer.length);
if (!new_buf) {
REPORT_ERROR
(("Ex_do_concatenate: Buffer allocation failure\n"));
status = AE_NO_MEMORY;
goto cleanup;
}
return_desc->buffer.pointer = (u8 *) new_buf;
/* Convert the first integer */
this_integer = obj_desc->integer.value;
for (i = 0; i < integer_size; i++) {
new_buf[i] = (u8) this_integer;
this_integer >>= 8;
}
/* Convert the second integer */
this_integer = obj_desc2->integer.value;
for (; i < (integer_size * 2); i++) {
new_buf[i] = (u8) this_integer;
this_integer >>= 8;
}
break;
case ACPI_TYPE_STRING:
return_desc = acpi_ut_create_internal_object (ACPI_TYPE_STRING);
if (!return_desc) {
return (AE_NO_MEMORY);
}
/* Operand0 is string */
new_buf = ACPI_MEM_ALLOCATE (obj_desc->string.length +
obj_desc2->string.length + 1);
if (!new_buf) {
REPORT_ERROR
(("Ex_do_concatenate: String allocation failure\n"));
status = AE_NO_MEMORY;
goto cleanup;
}
STRCPY (new_buf, obj_desc->string.pointer);
STRCPY (new_buf + obj_desc->string.length,
obj_desc2->string.pointer);
/* Point the return object to the new string */
return_desc->string.pointer = new_buf;
return_desc->string.length = obj_desc->string.length +=
obj_desc2->string.length;
break;
case ACPI_TYPE_BUFFER:
/* Operand0 is a buffer */
return_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
if (!return_desc) {
return (AE_NO_MEMORY);
}
new_buf = ACPI_MEM_ALLOCATE (obj_desc->buffer.length +
obj_desc2->buffer.length);
if (!new_buf) {
REPORT_ERROR
(("Ex_do_concatenate: Buffer allocation failure\n"));
status = AE_NO_MEMORY;
goto cleanup;
}
MEMCPY (new_buf, obj_desc->buffer.pointer,
obj_desc->buffer.length);
MEMCPY (new_buf + obj_desc->buffer.length, obj_desc2->buffer.pointer,
obj_desc2->buffer.length);
/*
* Point the return object to the new buffer
*/
return_desc->buffer.pointer = (u8 *) new_buf;
return_desc->buffer.length = obj_desc->buffer.length +
obj_desc2->buffer.length;
break;
default:
status = AE_AML_INTERNAL;
return_desc = NULL;
}
*actual_return_desc = return_desc;
return (AE_OK);
cleanup:
acpi_ut_remove_reference (return_desc);
return (status);
}
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");
/*
* 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.
*/
if (prefix_count == ACPI_UINT32_MAX) {
/* 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;
}
/*
* Allocate a buffer for the name.
* This buffer must be deleted by the caller!
*/
name_string = ACPI_MEM_ALLOCATE(size_needed);
if (!name_string) {
ACPI_ERROR((AE_INFO,
"Could not allocate size %d", size_needed));
return_PTR(NULL);
}
temp_ptr = name_string;
/* Set up Root or Parent prefixes if needed */
if (prefix_count == ACPI_UINT32_MAX) {
*temp_ptr++ = AML_ROOT_PREFIX;
} 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) {
/* Set up dual prefixes */
*temp_ptr++ = AML_DUAL_NAME_PREFIX;
}
/*
* Terminate string following prefixes. acpi_ex_name_segment() will
* append the segment(s)
*/
*temp_ptr = 0;
return_PTR(name_string);
}
NATIVE_CHAR *
AcpiExAllocateNameString (
UINT32 PrefixCount,
UINT32 NumNameSegs)
{
NATIVE_CHAR *TempPtr;
NATIVE_CHAR *NameString;
UINT32 SizeNeeded;
ACPI_FUNCTION_TRACE ("ExAllocateNameString");
/*
* Allow room for all \ and ^ prefixes, all segments, and a MultiNamePrefix.
* Also, one byte for the null terminator.
* This may actually be somewhat longer than needed.
*/
if (PrefixCount == ACPI_UINT32_MAX)
{
/* Special case for root */
SizeNeeded = 1 + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;
}
else
{
SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;
}
/*
* Allocate a buffer for the name.
* This buffer must be deleted by the caller!
*/
NameString = ACPI_MEM_ALLOCATE (SizeNeeded);
if (!NameString)
{
ACPI_REPORT_ERROR (("ExAllocateNameString: Could not allocate size %d\n", SizeNeeded));
return_PTR (NULL);
}
TempPtr = NameString;
/* Set up Root or Parent prefixes if needed */
if (PrefixCount == ACPI_UINT32_MAX)
{
*TempPtr++ = AML_ROOT_PREFIX;
}
else
{
while (PrefixCount--)
{
*TempPtr++ = AML_PARENT_PREFIX;
}
}
/* Set up Dual or Multi prefixes if needed */
if (NumNameSegs > 2)
{
/* Set up multi prefixes */
*TempPtr++ = AML_MULTI_NAME_PREFIX_OP;
*TempPtr++ = (char) NumNameSegs;
}
else if (2 == NumNameSegs)
{
/* Set up dual prefixes */
*TempPtr++ = AML_DUAL_NAME_PREFIX;
}
/*
* Terminate string following prefixes. AcpiExNameSegment() will
* append the segment(s)
*/
*TempPtr = 0;
return_PTR (NameString);
}
