*****************************************************************************/
/*
- * 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/actables.h>
-
#define _COMPONENT ACPI_TABLES
- ACPI_MODULE_NAME ("tbutils")
+ACPI_MODULE_NAME("tbutils")
+/* Local prototypes */
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+acpi_status
+acpi_tb_handle_to_object(u16 table_id, struct acpi_table_desc **table_desc);
+#endif
/*******************************************************************************
*
- * FUNCTION: acpi_tb_handle_to_object
+ * FUNCTION: acpi_tb_is_table_installed
*
- * PARAMETERS: table_id - Id for which the function is searching
- * table_desc - Pointer to return the matching table
- * descriptor.
+ * PARAMETERS: new_table_desc - Descriptor for new table being installed
*
- * RETURN: Search the tables to find one with a matching table_id and
- * return a pointer to that table descriptor.
+ * RETURN: Status - AE_ALREADY_EXISTS if the table is already installed
+ *
+ * DESCRIPTION: Determine if an ACPI table is already installed
+ *
+ * MUTEX: Table data structures should be locked
*
******************************************************************************/
-#ifdef ACPI_FUTURE_USAGE
-acpi_status
-acpi_tb_handle_to_object (
- u16 table_id,
- struct acpi_table_desc **return_table_desc)
-{
- u32 i;
- struct acpi_table_desc *table_desc;
-
-
- ACPI_FUNCTION_NAME ("tb_handle_to_object");
+acpi_status acpi_tb_is_table_installed(struct acpi_table_desc *new_table_desc)
+{
+ struct acpi_table_desc *table_desc;
+
+ ACPI_FUNCTION_TRACE("tb_is_table_installed");
+
+ /* Get the list descriptor and first table descriptor */
+
+ table_desc = acpi_gbl_table_lists[new_table_desc->type].next;
+
+ /* Examine all installed tables of this type */
+
+ while (table_desc) {
+ /*
+ * If the table lengths match, perform a full bytewise compare. This
+ * means that we will allow tables with duplicate oem_table_id(s), as
+ * long as the tables are different in some way.
+ *
+ * Checking if the table has been loaded into the namespace means that
+ * we don't check for duplicate tables during the initial installation
+ * of tables within the RSDT/XSDT.
+ */
+ if ((table_desc->loaded_into_namespace) &&
+ (table_desc->pointer->length ==
+ new_table_desc->pointer->length)
+ &&
+ (!ACPI_MEMCMP
+ (table_desc->pointer, new_table_desc->pointer,
+ new_table_desc->pointer->length))) {
+ /* Match: this table is already installed */
+
+ ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
+ "Table [%4.4s] already installed: Rev %X oem_table_id [%8.8s]\n",
+ new_table_desc->pointer->signature,
+ new_table_desc->pointer->revision,
+ new_table_desc->pointer->
+ oem_table_id));
+
+ new_table_desc->owner_id = table_desc->owner_id;
+ new_table_desc->installed_desc = table_desc;
+
+ return_ACPI_STATUS(AE_ALREADY_EXISTS);
+ }
- for (i = 0; i < ACPI_TABLE_MAX; i++) {
- table_desc = acpi_gbl_table_lists[i].next;
- while (table_desc) {
- if (table_desc->table_id == table_id) {
- *return_table_desc = table_desc;
- return (AE_OK);
- }
+ /* Get next table on the list */
- table_desc = table_desc->next;
- }
+ table_desc = table_desc->next;
}
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "table_id=%X does not exist\n", table_id));
- return (AE_BAD_PARAMETER);
+ return_ACPI_STATUS(AE_OK);
}
-#endif /* ACPI_FUTURE_USAGE */
-
/*******************************************************************************
*
******************************************************************************/
acpi_status
-acpi_tb_validate_table_header (
- struct acpi_table_header *table_header)
+acpi_tb_validate_table_header(struct acpi_table_header *table_header)
{
- acpi_name signature;
-
-
- ACPI_FUNCTION_NAME ("tb_validate_table_header");
+ acpi_name signature;
+ ACPI_FUNCTION_ENTRY();
/* Verify that this is a valid address */
- if (!acpi_os_readable (table_header, sizeof (struct acpi_table_header))) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Cannot read table header at %p\n", table_header));
+ if (!acpi_os_readable(table_header, sizeof(struct acpi_table_header))) {
+ ACPI_ERROR((AE_INFO,
+ "Cannot read table header at %p", table_header));
+
return (AE_BAD_ADDRESS);
}
/* Ensure that the signature is 4 ASCII characters */
- ACPI_MOVE_32_TO_32 (&signature, table_header->signature);
- if (!acpi_ut_valid_acpi_name (signature)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Table signature at %p [%p] has invalid characters\n",
- table_header, &signature));
+ ACPI_MOVE_32_TO_32(&signature, table_header->signature);
+ if (!acpi_ut_valid_acpi_name(signature)) {
+ ACPI_ERROR((AE_INFO,
+ "Table signature at %p [%p] has invalid characters",
+ table_header, &signature));
+
+ ACPI_WARNING((AE_INFO, "Invalid table signature found: [%4.4s]",
+ ACPI_CAST_PTR(char, &signature)));
- ACPI_REPORT_WARNING (("Invalid table signature found: [%4.4s]\n",
- (char *) &signature));
- ACPI_DUMP_BUFFER (table_header, sizeof (struct acpi_table_header));
+ ACPI_DUMP_BUFFER(table_header,
+ sizeof(struct acpi_table_header));
return (AE_BAD_SIGNATURE);
}
/* Validate the table length */
- if (table_header->length < sizeof (struct acpi_table_header)) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
- "Invalid length in table header %p name %4.4s\n",
- table_header, (char *) &signature));
+ if (table_header->length < sizeof(struct acpi_table_header)) {
+ ACPI_ERROR((AE_INFO,
+ "Invalid length in table header %p name %4.4s",
+ table_header, (char *)&signature));
- ACPI_REPORT_WARNING (("Invalid table header length (0x%X) found\n",
- (u32) table_header->length));
- ACPI_DUMP_BUFFER (table_header, sizeof (struct acpi_table_header));
+ ACPI_WARNING((AE_INFO,
+ "Invalid table header length (0x%X) found",
+ (u32) table_header->length));
+
+ ACPI_DUMP_BUFFER(table_header,
+ sizeof(struct acpi_table_header));
return (AE_BAD_HEADER);
}
return (AE_OK);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_tb_verify_table_checksum
******************************************************************************/
acpi_status
-acpi_tb_verify_table_checksum (
- struct acpi_table_header *table_header)
+acpi_tb_verify_table_checksum(struct acpi_table_header * table_header)
{
- u8 checksum;
- acpi_status status = AE_OK;
-
-
- ACPI_FUNCTION_TRACE ("tb_verify_table_checksum");
+ u8 checksum;
+ acpi_status status = AE_OK;
+ ACPI_FUNCTION_TRACE("tb_verify_table_checksum");
/* Compute the checksum on the table */
- checksum = acpi_tb_checksum (table_header, table_header->length);
+ checksum =
+ acpi_tb_generate_checksum(table_header, table_header->length);
/* Return the appropriate exception */
if (checksum) {
- ACPI_REPORT_WARNING (("Invalid checksum in table [%4.4s] (%02X, sum %02X is not zero)\n",
- table_header->signature, (u32) table_header->checksum, (u32) checksum));
+ ACPI_WARNING((AE_INFO,
+ "Invalid checksum in table [%4.4s] (%02X, sum %02X is not zero)",
+ table_header->signature,
+ (u32) table_header->checksum, (u32) checksum));
status = AE_BAD_CHECKSUM;
}
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
-
/*******************************************************************************
*
- * FUNCTION: acpi_tb_checksum
+ * FUNCTION: acpi_tb_generate_checksum
*
* PARAMETERS: Buffer - Buffer to checksum
* Length - Size of the buffer
*
- * RETURNS 8 bit checksum of buffer
+ * RETURN: 8 bit checksum of buffer
*
* DESCRIPTION: Computes an 8 bit checksum of the buffer(length) and returns it.
*
******************************************************************************/
-u8
-acpi_tb_checksum (
- void *buffer,
- u32 length)
+u8 acpi_tb_generate_checksum(void *buffer, u32 length)
{
- const u8 *limit;
- const u8 *rover;
- u8 sum = 0;
-
+ u8 *end_buffer;
+ u8 *rover;
+ u8 sum = 0;
if (buffer && length) {
/* Buffer and Length are valid */
- limit = (u8 *) buffer + length;
+ end_buffer = ACPI_ADD_PTR(u8, buffer, length);
- for (rover = buffer; rover < limit; rover++) {
+ for (rover = buffer; rover < end_buffer; rover++) {
sum = (u8) (sum + *rover);
}
}
return (sum);
}
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_handle_to_object
+ *
+ * PARAMETERS: table_id - Id for which the function is searching
+ * table_desc - Pointer to return the matching table
+ * descriptor.
+ *
+ * RETURN: Search the tables to find one with a matching table_id and
+ * return a pointer to that table descriptor.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_handle_to_object(u16 table_id,
+ struct acpi_table_desc ** return_table_desc)
+{
+ u32 i;
+ struct acpi_table_desc *table_desc;
+
+ ACPI_FUNCTION_NAME("tb_handle_to_object");
+ for (i = 0; i < ACPI_TABLE_MAX; i++) {
+ table_desc = acpi_gbl_table_lists[i].next;
+ while (table_desc) {
+ if (table_desc->table_id == table_id) {
+ *return_table_desc = table_desc;
+ return (AE_OK);
+ }
+
+ table_desc = table_desc->next;
+ }
+ }
+
+ ACPI_ERROR((AE_INFO, "table_id=%X does not exist", table_id));
+ return (AE_BAD_PARAMETER);
+}
+#endif
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