ACPI: ACPICA 20060421

Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)

Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)

Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.

Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)

Defined and deployed a new OSL interface,
acpi_os_validate_address().  This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)

Defined and deployed a new OSL interface,
acpi_os_validate_interface().  This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)

Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)

Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.

The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.

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

1 files changed, 57 insertions, 6 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 006b31a56559..109c3f8ae7df 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1042,12 +1042,12 @@ void acpi_os_release_lock(acpi_handle handle, acpi_cpu_flags flags)
  *
  * FUNCTION:    acpi_os_create_cache
  *
- * PARAMETERS:  CacheName       - Ascii name for the cache
- *              ObjectSize      - Size of each cached object
- *              MaxDepth        - Maximum depth of the cache (in objects)
- *              ReturnCache     - Where the new cache object is returned
+ * PARAMETERS:  name      - Ascii name for the cache
+ *              size      - Size of each cached object
+ *              depth     - Maximum depth of the cache (in objects) <ignored>
+ *              cache     - Where the new cache object is returned
  *
- * RETURN:      Status
+ * RETURN:      status
  *
  * DESCRIPTION: Create a cache object
  *
@@ -1057,7 +1057,10 @@ acpi_status
 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
 {
         *cache = kmem_cache_create(name, size, 0, 0, NULL, NULL);
-        return AE_OK;
+        if (cache == NULL)
+                return AE_ERROR;
+        else
+                return AE_OK;
 }
 
 /*******************************************************************************
@@ -1137,4 +1140,52 @@ void *acpi_os_acquire_object(acpi_cache_t * cache)
         return object;
 }
 
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_validate_interface
+ *
+ * PARAMETERS:  interface           - Requested interface to be validated
+ *
+ * RETURN:      AE_OK if interface is supported, AE_SUPPORT otherwise
+ *
+ * DESCRIPTION: Match an interface string to the interfaces supported by the
+ *              host. Strings originate from an AML call to the _OSI method.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_validate_interface (char *interface)
+{
+
+    return AE_SUPPORT;
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_os_validate_address
+ *
+ * PARAMETERS:  space_id             - ACPI space ID
+ *              address             - Physical address
+ *              length              - Address length
+ *
+ * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
+ *              should return AE_AML_ILLEGAL_ADDRESS.
+ *
+ * DESCRIPTION: Validate a system address via the host OS. Used to validate
+ *              the addresses accessed by AML operation regions.
+ *
+ *****************************************************************************/
+
+acpi_status
+acpi_os_validate_address (
+    u8                   space_id,
+    acpi_physical_address   address,
+    acpi_size               length)
+{
+
+    return AE_OK;
+}
+
+
 #endif