ACPI: ACPICA 20060623

Implemented a new acpi_spinlock type for the OSL lock
interfaces.  This allows the type to be customized to
the host OS for improved efficiency (since a spinlock is
usually a very small object.)

Implemented support for "ignored" bits in the ACPI
registers.  According to the ACPI specification, these
bits should be preserved when writing the registers via
a read/modify/write cycle. There are 3 bits preserved
in this manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9],
and PM1_STATUS[11].
http://bugzilla.kernel.org/show_bug.cgi?id=3691

Implemented the initial deployment of new OSL mutex
interfaces.  Since some host operating systems have
separate mutex and semaphore objects, this feature was
requested. The base code now uses mutexes (and the new
mutex interfaces) wherever a binary semaphore was used
previously. However, for the current release, the mutex
interfaces are defined as macros to map them to the
existing semaphore interfaces.

Fixed several problems with the support for the control
method SyncLevel parameter. The SyncLevel now works
according to the ACPI specification and in concert with the
Mutex SyncLevel parameter, since the current SyncLevel is
a property of the executing thread. Mutual exclusion for
control methods is now implemented with a mutex instead
of a semaphore.

Fixed three instances of the use of the C shift operator
in the bitfield support code (exfldio.c) to avoid the use
of a shift value larger than the target data width. The
behavior of C compilers is undefined in this case and can
cause unpredictable results, and therefore the case must
be detected and avoided.  (Fiodor Suietov)

Added an info message whenever an SSDT or OEM table
is loaded dynamically via the Load() or LoadTable()
ASL operators. This should improve debugging capability
since it will show exactly what tables have been loaded
(beyond the tables present in the RSDT/XSDT.)

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

10 files changed, 113 insertions, 59 deletions

diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
index b9beceb3314..b492857fe72 100644
--- a/include/acpi/acconfig.h
+++ b/include/acpi/acconfig.h
@@ -63,7 +63,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20060608
+#define ACPI_CA_VERSION                 0x20060623
 
 /*
  * OS name, used for the _OS object.  The _OS object is essentially obsolete,
diff --git a/include/acpi/acdispat.h b/include/acpi/acdispat.h
index 288f84903af..a22fe9cf849 100644
--- a/include/acpi/acdispat.h
+++ b/include/acpi/acdispat.h
@@ -201,7 +201,7 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
 acpi_status
 acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
                                union acpi_operand_object *obj_desc,
-                               struct acpi_namespace_node *calling_method_node);
+                               struct acpi_walk_state *walk_state);
 
 acpi_status
 acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state);
diff --git a/include/acpi/acglobal.h b/include/acpi/acglobal.h
index 14531d48f6b..06972e6637d 100644
--- a/include/acpi/acglobal.h
+++ b/include/acpi/acglobal.h
@@ -181,6 +181,12 @@ ACPI_EXTERN u8 acpi_gbl_integer_nybble_width;
 extern struct acpi_table_list acpi_gbl_table_lists[ACPI_TABLE_ID_MAX + 1];
 extern struct acpi_table_support acpi_gbl_table_data[ACPI_TABLE_ID_MAX + 1];
 
+/*****************************************************************************
+ *
+ * Mutual exlusion within ACPICA subsystem
+ *
+ ****************************************************************************/
+
 /*
  * Predefined mutex objects.  This array contains the
  * actual OS mutex handles, indexed by the local ACPI_MUTEX_HANDLEs.
@@ -188,6 +194,20 @@ extern struct acpi_table_support acpi_gbl_table_data[ACPI_TABLE_ID_MAX + 1];
  */
 ACPI_EXTERN struct acpi_mutex_info acpi_gbl_mutex_info[ACPI_NUM_MUTEX];
 
+/*
+ * Global lock semaphore works in conjunction with the actual HW global lock
+ */
+ACPI_EXTERN acpi_semaphore acpi_gbl_global_lock_semaphore;
+
+/*
+ * Spinlocks are used for interfaces that can be possibly called at
+ * interrupt level
+ */
+ACPI_EXTERN spinlock_t _acpi_gbl_gpe_lock;      /* For GPE data structs and registers */
+ACPI_EXTERN spinlock_t _acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */
+#define acpi_gbl_gpe_lock       &_acpi_gbl_gpe_lock
+#define acpi_gbl_hardware_lock  &_acpi_gbl_hardware_lock
+
 /*****************************************************************************
  *
  * Miscellaneous globals
@@ -217,7 +237,6 @@ ACPI_EXTERN struct acpi_object_notify_handler acpi_gbl_system_notify;
 ACPI_EXTERN acpi_exception_handler acpi_gbl_exception_handler;
 ACPI_EXTERN acpi_init_handler acpi_gbl_init_handler;
 ACPI_EXTERN struct acpi_walk_state *acpi_gbl_breakpoint_walk;
-ACPI_EXTERN acpi_handle acpi_gbl_global_lock_semaphore;
 
 /* Misc */
 
@@ -315,11 +334,6 @@ ACPI_EXTERN struct acpi_gpe_xrupt_info *acpi_gbl_gpe_xrupt_list_head;
 ACPI_EXTERN struct acpi_gpe_block_info
     *acpi_gbl_gpe_fadt_blocks[ACPI_MAX_GPE_BLOCKS];
 
-/* Spinlocks */
-
-ACPI_EXTERN acpi_handle acpi_gbl_gpe_lock;
-ACPI_EXTERN acpi_handle acpi_gbl_hardware_lock;
-
 /*****************************************************************************
  *
  * Debugger globals
diff --git a/include/acpi/acinterp.h b/include/acpi/acinterp.h
index 9f22cfcb624..216339a8f1f 100644
--- a/include/acpi/acinterp.h
+++ b/include/acpi/acinterp.h
@@ -287,7 +287,10 @@ acpi_ex_system_wait_event(union acpi_operand_object *time,
 
 acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc);
 
-acpi_status acpi_ex_system_wait_semaphore(acpi_handle semaphore, u16 timeout);
+acpi_status
+acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout);
+
+acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout);
 
 /*
  * exoparg1 - ACPI AML execution, 1 operand
diff --git a/include/acpi/aclocal.h b/include/acpi/aclocal.h
index 1eeca7adca9..56b80248616 100644
--- a/include/acpi/aclocal.h
+++ b/include/acpi/aclocal.h
@@ -47,10 +47,11 @@
 /* acpisrc:struct_defs -- for acpisrc conversion */
 
 #define ACPI_WAIT_FOREVER               0xFFFF  /* u16, as per ACPI spec */
-#define ACPI_INFINITE_CONCURRENCY       0xFF
+#define ACPI_DO_NOT_WAIT                0
+#define ACPI_SERIALIZED                 0xFF
 
-typedef void *acpi_mutex;
 typedef u32 acpi_mutex_handle;
+#define ACPI_GLOBAL_LOCK                (acpi_semaphore) (-1)
 
 /* Total number of aml opcodes defined */
 
@@ -79,16 +80,15 @@ union acpi_parse_object;
  * table below also!
  */
 #define ACPI_MTX_INTERPRETER            0       /* AML Interpreter, main lock */
-#define ACPI_MTX_CONTROL_METHOD         1       /* Control method termination [TBD: may no longer be necessary] */
-#define ACPI_MTX_TABLES                 2       /* Data for ACPI tables */
-#define ACPI_MTX_NAMESPACE              3       /* ACPI Namespace */
-#define ACPI_MTX_EVENTS                 4       /* Data for ACPI events */
-#define ACPI_MTX_CACHES                 5       /* Internal caches, general purposes */
-#define ACPI_MTX_MEMORY                 6       /* Debug memory tracking lists */
-#define ACPI_MTX_DEBUG_CMD_COMPLETE     7       /* AML debugger */
-#define ACPI_MTX_DEBUG_CMD_READY        8       /* AML debugger */
-
-#define ACPI_MAX_MUTEX                  8
+#define ACPI_MTX_TABLES                 1       /* Data for ACPI tables */
+#define ACPI_MTX_NAMESPACE              2       /* ACPI Namespace */
+#define ACPI_MTX_EVENTS                 3       /* Data for ACPI events */
+#define ACPI_MTX_CACHES                 4       /* Internal caches, general purposes */
+#define ACPI_MTX_MEMORY                 5       /* Debug memory tracking lists */
+#define ACPI_MTX_DEBUG_CMD_COMPLETE     6       /* AML debugger */
+#define ACPI_MTX_DEBUG_CMD_READY        7       /* AML debugger */
+
+#define ACPI_MAX_MUTEX                  7
 #define ACPI_NUM_MUTEX                  ACPI_MAX_MUTEX+1
 
 #if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)
@@ -98,14 +98,13 @@ union acpi_parse_object;
 
 static char *acpi_gbl_mutex_names[ACPI_NUM_MUTEX] = {
         "ACPI_MTX_Interpreter",
-        "ACPI_MTX_Method",
         "ACPI_MTX_Tables",
         "ACPI_MTX_Namespace",
         "ACPI_MTX_Events",
         "ACPI_MTX_Caches",
         "ACPI_MTX_Memory",
-        "ACPI_MTX_DebugCmdComplete",
-        "ACPI_MTX_DebugCmdReady"
+        "ACPI_MTX_CommandComplete",
+        "ACPI_MTX_CommandReady"
 };
 
 #endif
@@ -705,6 +704,13 @@ struct acpi_bit_register_info {
 };
 
 /*
+ * Some ACPI registers have bits that must be ignored -- meaning that they
+ * must be preserved.
+ */
+#define ACPI_PM1_STATUS_PRESERVED_BITS          0x0800  /* Bit 11 */
+#define ACPI_PM1_CONTROL_PRESERVED_BITS         0x0201  /* Bit 9, Bit 0 (SCI_EN) */
+
+/*
  * Register IDs
  * These are the full ACPI registers
  */
diff --git a/include/acpi/acmacros.h b/include/acpi/acmacros.h
index 38f9aa4bef0..4bb38068f40 100644
--- a/include/acpi/acmacros.h
+++ b/include/acpi/acmacros.h
@@ -394,6 +394,8 @@
 #define ACPI_REGISTER_PREPARE_BITS(val, pos, mask)      ((val << pos) & mask)
 #define ACPI_REGISTER_INSERT_VALUE(reg, pos, mask, val)  reg = (reg & (~(mask))) | ACPI_REGISTER_PREPARE_BITS(val, pos, mask)
 
+#define ACPI_INSERT_BITS(target, mask, source)          target = ((target & (~(mask))) | (source & mask))
+
 /* Generate a UUID */
 
 #define ACPI_INIT_UUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
diff --git a/include/acpi/acobject.h b/include/acpi/acobject.h
index 1747d94084d..8fdee31119f 100644
--- a/include/acpi/acobject.h
+++ b/include/acpi/acobject.h
@@ -140,14 +140,14 @@ struct acpi_object_package {
  *****************************************************************************/
 
 struct acpi_object_event {
-        ACPI_OBJECT_COMMON_HEADER void *semaphore;
+        ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;  /* Actual OS synchronization object */
 };
 
 struct acpi_object_mutex {
         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
-        void *semaphore;        /* Actual OS synchronization object */
+        acpi_mutex os_mutex;    /* Actual OS synchronization object */
         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
         struct acpi_namespace_node *node;       /* Containing namespace node */
@@ -166,8 +166,8 @@ struct acpi_object_region {
 struct acpi_object_method {
         ACPI_OBJECT_COMMON_HEADER u8 method_flags;
         u8 param_count;
-        u8 concurrency;
-        void *semaphore;
+        u8 sync_level;
+        union acpi_operand_object *mutex;
         u8 *aml_start;
         ACPI_INTERNAL_METHOD implementation;
         u32 aml_length;
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 8f473c83b7c..89bc4a16c2e 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -96,25 +96,47 @@ acpi_os_table_override(struct acpi_table_header *existing_table,
                        struct acpi_table_header **new_table);
 
 /*
- * Synchronization primitives
+ * Spinlock primitives
+ */
+acpi_status acpi_os_create_lock(acpi_spinlock * out_handle);
+
+void acpi_os_delete_lock(acpi_spinlock handle);
+
+acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock handle);
+
+void acpi_os_release_lock(acpi_spinlock handle, acpi_cpu_flags flags);
+
+/*
+ * Semaphore primitives
  */
 acpi_status
 acpi_os_create_semaphore(u32 max_units,
-                         u32 initial_units, acpi_handle * out_handle);
+                         u32 initial_units, acpi_semaphore * out_handle);
 
-acpi_status acpi_os_delete_semaphore(acpi_handle handle);
+acpi_status acpi_os_delete_semaphore(acpi_semaphore handle);
 
-acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout);
+acpi_status
+acpi_os_wait_semaphore(acpi_semaphore handle, u32 units, u16 timeout);
+
+acpi_status acpi_os_signal_semaphore(acpi_semaphore handle, u32 units);
+
+/*
+ * Mutex primitives
+ */
+acpi_status acpi_os_create_mutex(acpi_mutex * out_handle);
 
-acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units);
+void acpi_os_delete_mutex(acpi_mutex handle);
 
-acpi_status acpi_os_create_lock(acpi_handle * out_handle);
+acpi_status acpi_os_acquire_mutex(acpi_mutex handle, u16 timeout);
 
-void acpi_os_delete_lock(acpi_handle handle);
+void acpi_os_release_mutex(acpi_mutex handle);
 
-acpi_cpu_flags acpi_os_acquire_lock(acpi_handle handle);
+/* Temporary macros for Mutex* interfaces, map to existing semaphore xfaces */
 
-void acpi_os_release_lock(acpi_handle handle, acpi_cpu_flags flags);
+#define acpi_os_create_mutex(out_handle)    acpi_os_create_semaphore (1, 1, out_handle)
+#define acpi_os_delete_mutex(handle)        (void) acpi_os_delete_semaphore (handle)
+#define acpi_os_acquire_mutex(handle,time)  acpi_os_wait_semaphore (handle, 1, time)
+#define acpi_os_release_mutex(handle)       (void) acpi_os_signal_semaphore (handle, 1)
 
 /*
  * Memory allocation and mapping
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 77cf1236b05..64b603cfe92 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -241,7 +241,7 @@ typedef acpi_native_uint acpi_size;
 
 /*******************************************************************************
  *
- * OS- or compiler-dependent types
+ * OS-dependent and compiler-dependent types
  *
  * If the defaults below are not appropriate for the host system, they can
  * be defined in the compiler-specific or OS-specific header, and this will
@@ -249,29 +249,36 @@ typedef acpi_native_uint acpi_size;
  *
  ******************************************************************************/
 
-/* Use C99 uintptr_t for pointer casting if available, "void *" otherwise */
+/* Value returned by acpi_os_get_thread_id */
 
-#ifndef acpi_uintptr_t
-#define acpi_uintptr_t                  void *
+#ifndef acpi_thread_id
+#define acpi_thread_id                  acpi_native_uint
 #endif
 
-/*
- * If acpi_cache_t was not defined in the OS-dependent header,
- * define it now. This is typically the case where the local cache
- * manager implementation is to be used (ACPI_USE_LOCAL_CACHE)
- */
-#ifndef acpi_cache_t
-#define acpi_cache_t                    struct acpi_memory_list
+/* Object returned from acpi_os_create_lock */
+
+#ifndef acpi_spinlock
+#define acpi_spinlock                   void *
 #endif
 
-/*
- * Allow the CPU flags word to be defined per-OS to simplify the use of the
- * lock and unlock OSL interfaces.
- */
+/* Flags for acpi_os_acquire_lock/acpi_os_release_lock */
+
 #ifndef acpi_cpu_flags
 #define acpi_cpu_flags                  acpi_native_uint
 #endif
 
+/* Object returned from acpi_os_create_cache */
+
+#ifndef acpi_cache_t
+#define acpi_cache_t                    struct acpi_memory_list
+#endif
+
+/* Use C99 uintptr_t for pointer casting if available, "void *" otherwise */
+
+#ifndef acpi_uintptr_t
+#define acpi_uintptr_t                  void *
+#endif
+
 /*
  * ACPI_PRINTF_LIKE is used to tag functions as "printf-like" because
  * some compilers can catch printf format string problems
@@ -298,13 +305,6 @@ typedef acpi_native_uint acpi_size;
 #define ACPI_EXPORT_SYMBOL(symbol)
 #endif
 
-/*
- * thread_id is returned by acpi_os_get_thread_id.
- */
-#ifndef acpi_thread_id
-#define acpi_thread_id                  acpi_native_uint
-#endif
-
 /*******************************************************************************
  *
  * Independent types
@@ -380,6 +380,11 @@ struct uint32_struct {
         u32 hi;
 };
 
+/* Synchronization objects */
+
+#define acpi_mutex                      void *
+#define acpi_semaphore                  void *
+
 /*
  * Acpi integer width. In ACPI version 1, integers are
  * 32 bits.  In ACPI version 2, integers are 64 bits.
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 277d35bced0..3f853cabbd4 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -58,11 +58,13 @@
 #include <asm/div64.h>
 #include <asm/acpi.h>
 #include <linux/slab.h>
+#include <linux/spinlock_types.h>
 
 /* Host-dependent types and defines */
 
 #define ACPI_MACHINE_WIDTH          BITS_PER_LONG
 #define acpi_cache_t                        kmem_cache_t
+#define acpi_spinlock                   spinlock_t *
 #define ACPI_EXPORT_SYMBOL(symbol)  EXPORT_SYMBOL(symbol);
 #define strtoul                     simple_strtoul