Micro-sequence based security model
    1.
    发明授权
    Micro-sequence based security model 有权
    基于微序列的安全模型

    公开(公告)号:US08190861B2

    公开(公告)日:2012-05-29

    申请号:US11677367

    申请日:2007-02-21

    IPC分类号: G06F9/00

    CPC分类号: G06F9/4812

    摘要: A method and system for implementing a micro-sequence based security model in a processor. More particularly, micro-sequences and JSM hardware resources are employed to construct a security model invisible to applications, and when memory constraints are in place, extend a complex security model in JSM code by implementing a micro-sequence security trigger. The method includes micro-sequence based security policy that determines whether an instruction accesses a privileged resource associated with a processor and when not already in privilege mode and not executing a micro-sequence, the micro-sequence based security policy is applied to the instruction to control access to the privileged resource according to the security policy.

    摘要翻译: 一种用于在处理器中实现基于微序列的安全模型的方法和系统。 更具体地,使用微序列和JSM硬件资源来构建对应用不可见的安全模型,并且当存储器约束到位时,通过实现微序列安全触发来扩展JSM代码中的复杂安全模型。 该方法包括基于微序列的安全策略,其确定指令是否访问与处理器相关联的特权资源,以及当尚未处于特权模式且不执行微序列时,将基于微序列的安全策略应用于 根据安全策略控制对特权资源的访问。

    Accessing device driver memory in programming language representation
    2.
    发明授权
    Accessing device driver memory in programming language representation 有权
    以编程语言表示访问设备驱动程序内存

    公开(公告)号:US07496930B2

    公开(公告)日:2009-02-24

    申请号:US10831575

    申请日:2004-04-22

    IPC分类号: G06F13/00

    CPC分类号: G09G5/39 G06F3/14 G09G5/393

    摘要: In some embodiments, a storage medium comprises application software that performs one or more operations and that directly manages a device. The application software comprises instructions that initialize an application data structure (e.g., an object or array) usable by the application software to manage the device and also comprises instructions that map the application data structure to a memory associated with the device without the use of a device driver. In other embodiments, a method comprises initializing an application data structure to manage a hardware device and mapping the application data structure to a memory associated with the hardware device without the use of a device driver. The application data structure may store a single dimensional data structure or a multi-dimensional data structure. In some embodiments, the device being managed by the application software may comprise a display and the application software may comprise Java code.

    摘要翻译: 在一些实施例中,存储介质包括执行一个或多个操作并直接管理设备的应用软件。 应用软件包括初始化应用软件可用于管理设备的应用数据结构(例如,对象或阵列)的指令,还包括将应用数据结构映射到与设备相关联的存储器而不使用 设备驱动。 在其他实施例中,一种方法包括初始化应用数据结构以管理硬件设备,并将应用数据结构映射到与硬件设备相关联的存储器,而不使用设备驱动程序。 应用数据结构可以存储单维数据结构或多维数据结构。 在一些实施例中,由应用软件管理的设备可以包括显示器,并且应用软件可以包括Java代码。

    Energy-aware scheduling of application execution
    6.
    发明授权
    Energy-aware scheduling of application execution 有权
    能源感知调度应用程序执行

    公开(公告)号:US08032891B2

    公开(公告)日:2011-10-04

    申请号:US10151282

    申请日:2002-05-20

    IPC分类号: G06F9/46 G06F1/32

    摘要: A mobile device (10) manages tasks (18) using a scheduler (20) for scheduling tasks on multiple processors (12). To conserve energy, the set of tasks to be scheduled are divided into two (or more) subsets, which are scheduled according to different procedures. In a specific embodiment, the first subset contains tasks with the highest energy consumption deviation based on the processor that executes the task. This subset is scheduled according to a power-aware procedure for scheduling tasks primarily based on energy consumption criteria. If there is no failure, the second subset is scheduled according to a real-time constrained procedure that schedules tasks primarily based on the deadlines associated with the various tasks in the second subset. If there is a failure in either procedure, one or more tasks with the lowest energy consumption deviation are moved from the first subset to the second subset and the scheduling is repeated.

    摘要翻译: 移动设备(10)使用调度器(20)管理任务(18),用于在多个处理器(12)上调度任务。 为了节约能源,要调度的任务集合分为两个(或多个)子集,根据不同的过程进行调度。 在具体实施例中,第一子集基于执行任务的处理器包含具有最高能量消耗偏差的任务。 该子集根据用于主要基于能量消耗标准的调度任务的功率感知程序进行调度。 如果没有失败,则根据实时约束程序调度第二子集,该实时约束过程主要基于与第二子集中的各种任务相关联的期限来调度任务。 如果任何一个过程都有故障,则能量消耗偏差最小的一个或多个任务从第一个子集移动到第二个子集,重复调度。

    Multiple microprocessors with a shared cache
    9.
    发明授权
    Multiple microprocessors with a shared cache 有权
    具有共享缓存的多个微处理器

    公开(公告)号:US06751706B2

    公开(公告)日:2004-06-15

    申请号:US09932651

    申请日:2001-08-17

    IPC分类号: G06F1200

    摘要: A digital system is provided with a several processors, a private level one (L1) cache associated with each processor, a shared level two (L2) cache having several segments per entry, and a level three (L3) physical memory. The shared L2 cache architecture is embodied with 4-way associativity, four segments per entry and four valid and dirty bits. When the L2-cache misses, the penalty to access to data within the L3 memory is high. The system supports miss under miss to let a second miss interrupt a segment prefetch being done in response to a first miss. Thus, an interruptible SDRAM to L2-cache prefetch system with miss under miss support is provided. A shared translation look-aside buffer (TLB) is provided for L2 accesses, while a private TLB is associated with each processor. A micro TLB (&mgr;TLB) is associated with each resource that can initiate a memory transfer. The L2 cache, along with all of the TLBs and &mgr;TLBs have resource ID fields and task ID fields associated with each entry to allow flushing and cleaning based on resource or task. Configuration circuitry is provided to allow the digital system to be configured on a task by task basis in order to reduce power consumption.

    摘要翻译: 数字系统具有几个处理器,与每个处理器相关联的私有一级(L1)高速缓存,每个条目具有多个段的共享二级(L2)高速缓存以及三级(L3)物理存储器。 共享的L2高速缓存体系结构体现为4路关联性,每个条目有4个段和4个有效位和脏位。 当L2缓存未命中时,访问L3内存中的数据的惩罚很高。 该系统支持未命中错过,以使第二个错误中断一个段预取正在响应于第一个错过。 因此,提供了一个可中断的SDRAM到L2缓存预取系统,其中错过了支持。 为L2访问提供共享翻译后备缓冲器(TLB),而私有TLB与每个处理器相关联。 微型TLB(muTLB)与可以启动存储器传输的每个资源相关联。 L2缓存以及所有TLB和muTLB都具有与每个条目关联的资源ID字段和任务ID字段,以允许基于资源或任务的冲洗和清理。 提供配置电路以允许数字系统根据任务在任务上进行配置,以便降低功耗。

    Test and skip processor instruction having at least one register operand
    10.
    发明授权
    Test and skip processor instruction having at least one register operand 有权
    测试和跳过具有至少一个寄存器操作数的处理器指令

    公开(公告)号:US07840784B2

    公开(公告)日:2010-11-23

    申请号:US10632084

    申请日:2003-07-31

    IPC分类号: G06F9/32

    摘要: A processor may execute a test and skip instruction that includes or otherwise specifies at least two operands that are used in a comparison operation. Based on the results of the comparison, the instruction that follows the test and skip instruction is “skipped.” The test and skip instruction may specify that the operands used in the comparison include (1) the contents of two registers, (2) the contents of one register and the contents of a memory location, or (3) the contents of one register and a stack value. In the second mode (an operand being from memory), a register is specified in the test and skip instruction that contains a value from which a pointer may be calculated. The calculated pointer preferably points to the memory location. If a stack value is used in the execution of the test and skip instruction, the instruction may include a reference to a register that points to the top of the stack. Further, the stack pointer may be adjusted automatically if the stack is used to provide an operand for the instruction. Embodiments may include apparatus and methods.

    摘要翻译: 处理器可以执行包括或以其他方式指定在比较操作中使用的至少两个操作数的测试和跳过指令。 根据比较结果,测试和跳过指令之后的指令被“跳过”。测试和跳过指令可以指定比较中使用的操作数包括(1)两个寄存器的内容,(2) 一个寄存器的内容和存储器位置的内容,或(3)一个寄存器的内容和堆栈值。 在第二模式(一个来自存储器的操作数)中,在测试和跳过指令中指定一个寄存器,该指令包含可以计算指针的值。 计算出的指针最好指向存储器位置。 如果在执行测试和跳过指令时使用堆栈值,则该指令可以包括对指向堆栈顶部的寄存器的引用。 此外,如果堆栈用于为指令提供操作数,则可以自动调整堆栈指针。 实施例可以包括装置和方法。