ACPI: ACPICA 20060331

Implemented header file support for the following
additional ACPI tables: ASF!, BOOT, CPEP, DBGP, MCFG, SPCR,
SPMI, TCPA, and WDRT. With this support, all current and
known ACPI tables are now defined in the ACPICA headers and
are available for use by device drivers and other software.

Implemented support to allow tables that contain ACPI
names with invalid characters to be loaded. Previously,
this would cause the table load to fail, but since
there are several known cases of such tables on
existing machines, this change was made to enable
ACPI support for them. Also, this matches the
behavior of the Microsoft ACPI implementation.
https://bugzilla.novell.com/show_bug.cgi?id=147621

Fixed a couple regressions introduced during the memory
optimization in the 20060317 release. The namespace
node definition required additional reorganization and
an internal datatype that had been changed to 8-bit was
restored to 32-bit. (Valery Podrezov)

Fixed a problem where a null pointer passed to
acpi_ut_delete_generic_state() could be passed through
to acpi_os_release_object which is unexpected. Such
null pointers are now trapped and ignored, matching
the behavior of the previous implementation before the
deployment of acpi_os_release_object().  (Valery Podrezov,
Fiodor Suietov)

Fixed a memory mapping leak during the deletion of
a SystemMemory operation region where a cached memory
mapping was not deleted. This became a noticeable problem
for operation regions that are defined within frequently
used control methods. (Dana Meyers)

Reorganized the ACPI table header files into two main
files: one for the ACPI tables consumed by the ACPICA core,
and another for the miscellaneous ACPI tables that are
consumed by the drivers and other software. The various
FADT definitions were merged into one common section and
three different tables (ACPI 1.0, 1.0+, and 2.0)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 87 insertions, 17 deletions

diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index 017a87ebc40..4623d7e215d 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -49,6 +49,33 @@ ACPI_MODULE_NAME("utmisc")
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ut_is_aml_table
+ *
+ * PARAMETERS:  Table               - An ACPI table
+ *
+ * RETURN:      TRUE if table contains executable AML; FALSE otherwise
+ *
+ * DESCRIPTION: Check ACPI Signature for a table that contains AML code.
+ *              Currently, these are DSDT,SSDT,PSDT. All other table types are
+ *              data tables that do not contain AML code.
+ *
+ ******************************************************************************/
+u8 acpi_ut_is_aml_table(struct acpi_table_header *table)
+{
+
+        /* Ignore tables that contain AML */
+
+        if (ACPI_COMPARE_NAME(table->signature, DSDT_SIG) ||
+            ACPI_COMPARE_NAME(table->signature, PSDT_SIG) ||
+            ACPI_COMPARE_NAME(table->signature, SSDT_SIG)) {
+                return (TRUE);
+        }
+
+        return (FALSE);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ut_allocate_owner_id
  *
  * PARAMETERS:  owner_id        - Where the new owner ID is returned
@@ -60,6 +87,7 @@ ACPI_MODULE_NAME("utmisc")
  *              when the method exits or the table is unloaded.
  *
  ******************************************************************************/
+
 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id)
 {
         acpi_native_uint i;
@@ -469,6 +497,41 @@ acpi_ut_display_init_pathname(u8 type,
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ut_valid_acpi_char
+ *
+ * PARAMETERS:  Char            - The character to be examined
+ *
+ * RETURN:      TRUE if the character is valid, FALSE otherwise
+ *
+ * DESCRIPTION: Check for a valid ACPI character. Must be one of:
+ *              1) Upper case alpha
+ *              2) numeric
+ *              3) underscore
+ *
+ *              We allow a '!' as the last character because of the ASF! table
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_valid_acpi_char(char character, acpi_native_uint position)
+{
+
+        if (!((character >= 'A' && character <= 'Z') ||
+              (character >= '0' && character <= '9') || (character == '_'))) {
+
+                /* Allow a '!' in the last position */
+
+                if (character == '!' && position == 3) {
+                        return (TRUE);
+                }
+
+                return (FALSE);
+        }
+
+        return (TRUE);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ut_valid_acpi_name
  *
  * PARAMETERS:  Name            - The name to be examined
@@ -484,19 +547,13 @@ acpi_ut_display_init_pathname(u8 type,
 
 u8 acpi_ut_valid_acpi_name(u32 name)
 {
-        char *name_ptr = (char *)&name;
-        char character;
         acpi_native_uint i;
 
         ACPI_FUNCTION_ENTRY();
 
         for (i = 0; i < ACPI_NAME_SIZE; i++) {
-                character = *name_ptr;
-                name_ptr++;
-
-                if (!((character == '_') ||
-                      (character >= 'A' && character <= 'Z') ||
-                      (character >= '0' && character <= '9'))) {
+                if (!acpi_ut_valid_acpi_char
+                    ((ACPI_CAST_PTR(char, &name))[i], i)) {
                         return (FALSE);
                 }
         }
@@ -506,24 +563,37 @@ u8 acpi_ut_valid_acpi_name(u32 name)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ut_valid_acpi_character
+ * FUNCTION:    acpi_ut_repair_name
  *
- * PARAMETERS:  Character           - The character to be examined
+ * PARAMETERS:  Name            - The ACPI name to be repaired
  *
- * RETURN:      1 if Character may appear in a name, else 0
+ * RETURN:      Repaired version of the name
  *
- * DESCRIPTION: Check for a printable character
+ * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
+ *              return the new name.
  *
  ******************************************************************************/
 
-u8 acpi_ut_valid_acpi_character(char character)
+acpi_name acpi_ut_repair_name(acpi_name name)
 {
+        char *name_ptr = ACPI_CAST_PTR(char, &name);
+        char new_name[ACPI_NAME_SIZE];
+        acpi_native_uint i;
 
-        ACPI_FUNCTION_ENTRY();
+        for (i = 0; i < ACPI_NAME_SIZE; i++) {
+                new_name[i] = name_ptr[i];
+
+                /*
+                 * Replace a bad character with something printable, yet technically
+                 * still invalid. This prevents any collisions with existing "good"
+                 * names in the namespace.
+                 */
+                if (!acpi_ut_valid_acpi_char(name_ptr[i], i)) {
+                        new_name[i] = '*';
+                }
+        }
 
-        return ((u8) ((character == '_') ||
-                      (character >= 'A' && character <= 'Z') ||
-                      (character >= '0' && character <= '9')));
+        return (*ACPI_CAST_PTR(u32, new_name));
 }
 
 /*******************************************************************************