• Robert Moore's avatar
    ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> · 73459f73
    Robert Moore authored
    ACPICA 20050617:
    
    Moved the object cache operations into the OS interface
    layer (OSL) to allow the host OS to handle these operations
    if desired (for example, the Linux OSL will invoke the
    slab allocator).  This support is optional; the compile
    time define ACPI_USE_LOCAL_CACHE may be used to utilize
    the original cache code in the ACPI CA core.  The new OSL
    interfaces are shown below.  See utalloc.c for an example
    implementation, and acpiosxf.h for the exact interface
    definitions.  Thanks to Alexey Starikovskiy.
    	acpi_os_create_cache
    	acpi_os_delete_cache
    	acpi_os_purge_cache
    	acpi_os_acquire_object
    	acpi_os_release_object
    
    Modified the interfaces to acpi_os_acquire_lock and
    acpi_os_release_lock to return and restore a flags
    parameter.  This fits better with many OS lock models.
    Note: the current execution state (interrupt handler
    or not) is no longer passed to these interfaces.  If
    necessary, the OSL must determine this state by itself, a
    simple and fast operation.  Thanks to Alexey Starikovskiy.
    
    Fixed a problem in the ACPI table handling where a valid
    XSDT was assumed present if the revision of the RSDP
    was 2 or greater.  According to the ACPI specification,
    the XSDT is optional in all cases, and the table manager
    therefore now checks for both an RSDP >=2 and a valid
    XSDT pointer.  Otherwise, the RSDT pointer is used.
    Some ACPI 2.0 compliant BIOSs contain only the RSDT.
    
    Fixed an interpreter problem with the Mid() operator in the
    case of an input string where the resulting output string
    is of zero length.  It now correctly returns a valid,
    null terminated string object instead of a string object
    with a null pointer.
    
    Fixed a problem with the control method argument handling
    to allow a store to an Arg object that already contains an
    object of type Device.  The Device object is now correctly
    overwritten.  Previously, an error was returned.
    
    ACPICA 20050624:
    
    Modified the new OSL cache interfaces to use ACPI_CACHE_T
    as the type for the host-defined cache object.  This allows
    the OSL implementation to define and type this object in
    any manner desired, simplifying the OSL implementation.
    For example, ACPI_CACHE_T is defined as kmem_cache_t for
    Linux, and should be defined in the OS-specific header
    file for other operating systems as required.
    
    Changed the interface to AcpiOsAcquireObject to directly
    return the requested object as the function return (instead
    of ACPI_STATUS.) This change was made for performance
    reasons, since this is the purpose of the interface in the
    first place.  acpi_os_acquire_object is now similar to the
    acpi_os_allocate interface.  Thanks to Alexey Starikovskiy.
    
    Modified the initialization sequence in
    acpi_initialize_subsystem to call the OSL interface
    acpi_osl_initialize first, before any local initialization.
    This change was required because the global initialization
    now calls OSL interfaces.
    
    Restructured the code base to split some files because
    of size and/or because the code logically belonged in a
    separate file.  New files are listed below.
    
      utilities/utcache.c	/* Local cache interfaces */
      utilities/utmutex.c	/* Local mutex support */
      utilities/utstate.c	/* State object support */
      parser/psloop.c	/* Main AML parse loop */
    Signed-off-by: default avatarLen Brown <len.brown@intel.com>
    73459f73
Makefile 271 Bytes