ACPI_STATUS
acpi_tb_map_acpi_table (
ACPI_PHYSICAL_ADDRESS physical_address,
u32 *size,
void **logical_address)
{
ACPI_TABLE_HEADER *table;
u32 table_size = *size;
ACPI_STATUS status = AE_OK;
/* If size is zero, look at the table header to get the actual size */
if ((*size) == 0) {
/* Get the table header so we can extract the table length */
status = acpi_os_map_memory (physical_address, sizeof (ACPI_TABLE_HEADER),
(void **) &table);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Extract the full table length before we delete the mapping */
table_size = table->length;
/*
* Validate the header and delete the mapping.
* We will create a mapping for the full table below.
*/
status = acpi_tb_validate_table_header (table);
/* Always unmap the memory for the header */
acpi_os_unmap_memory (table, sizeof (ACPI_TABLE_HEADER));
/* Exit if header invalid */
if (ACPI_FAILURE (status)) {
return (status);
}
}
/* Map the physical memory for the correct length */
status = acpi_os_map_memory (physical_address, table_size, (void **) &table);
if (ACPI_FAILURE (status)) {
return (status);
}
*size = table_size;
*logical_address = table;
return (status);
}
acpi_status
acpi_tb_recognize_table (
struct acpi_table_desc *table_info,
u8 search_type)
{
struct acpi_table_header *table_header;
acpi_status status;
ACPI_FUNCTION_TRACE ("tb_recognize_table");
/* Ensure that we have a valid table pointer */
table_header = (struct acpi_table_header *) table_info->pointer;
if (!table_header) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* We only "recognize" a limited number of ACPI tables -- namely, the
* ones that are used by the subsystem (DSDT, FADT, etc.)
*
* An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
* This can be any one of many valid ACPI tables, it just isn't one of
* the tables that is consumed by the core subsystem
*/
status = acpi_tb_match_signature (table_header->signature, table_info, search_type);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_tb_validate_table_header (table_header);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Return the table type and length via the info struct */
table_info->length = (acpi_size) table_header->length;
return_ACPI_STATUS (status);
}
static acpi_status
acpi_ut_read_table(FILE * fp,
struct acpi_table_header **table, u32 *table_length)
{
struct acpi_table_header table_header;
u32 actual;
acpi_status status;
u32 file_size;
u8 standard_header = TRUE;
s32 count;
/* Get the file size */
file_size = cm_get_file_size(fp);
if (file_size == ACPI_UINT32_MAX) {
return (AE_ERROR);
}
if (file_size < 4) {
return (AE_BAD_HEADER);
}
/* Read the signature */
fseek(fp, 0, SEEK_SET);
count = fread(&table_header, 1, sizeof(struct acpi_table_header), fp);
if (count != sizeof(struct acpi_table_header)) {
acpi_os_printf("Could not read the table header\n");
return (AE_BAD_HEADER);
}
/* The RSDP table does not have standard ACPI header */
if (ACPI_VALIDATE_RSDP_SIG(table_header.signature)) {
*table_length = file_size;
standard_header = FALSE;
} else {
#if 0
/* Validate the table header/length */
status = acpi_tb_validate_table_header(&table_header);
if (ACPI_FAILURE(status)) {
acpi_os_printf("Table header is invalid!\n");
return (status);
}
#endif
/* File size must be at least as long as the Header-specified length */
if (table_header.length > file_size) {
acpi_os_printf
("TableHeader length [0x%X] greater than the input file size [0x%X]\n",
table_header.length, file_size);
#ifdef ACPI_ASL_COMPILER
acpi_os_printf("File is corrupt or is ASCII text -- "
"it must be a binary file\n");
#endif
return (AE_BAD_HEADER);
}
#ifdef ACPI_OBSOLETE_CODE
/* We only support a limited number of table types */
if (!ACPI_COMPARE_NAME
((char *)table_header.signature, ACPI_SIG_DSDT)
&& !ACPI_COMPARE_NAME((char *)table_header.signature,
ACPI_SIG_PSDT)
&& !ACPI_COMPARE_NAME((char *)table_header.signature,
ACPI_SIG_SSDT)) {
acpi_os_printf
("Table signature [%4.4s] is invalid or not supported\n",
(char *)table_header.signature);
ACPI_DUMP_BUFFER(&table_header,
sizeof(struct acpi_table_header));
return (AE_ERROR);
}
#endif
*table_length = table_header.length;
}
/* Allocate a buffer for the table */
*table = acpi_os_allocate((size_t) file_size);
if (!*table) {
acpi_os_printf
("Could not allocate memory for ACPI table %4.4s (size=0x%X)\n",
table_header.signature, *table_length);
return (AE_NO_MEMORY);
}
/* Get the rest of the table */
fseek(fp, 0, SEEK_SET);
actual = fread(*table, 1, (size_t) file_size, fp);
if (actual == file_size) {
if (standard_header) {
/* Now validate the checksum */
status = acpi_tb_verify_checksum((void *)*table,
ACPI_CAST_PTR(struct
acpi_table_header,
*table)->
length);
if (status == AE_BAD_CHECKSUM) {
status =
acpi_ut_check_text_mode_corruption((u8 *)
*table,
file_size,
(*table)->
length);
return (status);
}
}
return (AE_OK);
}
if (actual > 0) {
acpi_os_printf("Warning - reading table, asked for %X got %X\n",
file_size, actual);
return (AE_OK);
}
acpi_os_printf("Error - could not read the table file\n");
acpi_os_free(*table);
*table = NULL;
*table_length = 0;
return (AE_ERROR);
}
