1. 20 Jul, 2017 1 commit
    • Soby Mathew's avatar
      CSS: Reorganize the SCP Image transfer functionality · 74d44a49
      Soby Mathew authored
      
      
      The SCP_BL2 is transferred to SCP during BL2 image load and authenticate
      sequence. The Boot-Over-MHU (BOM) protocol is used as transport for this. After
      the SCP boots using the transferred image, the AP CPU waits till the `READY`
      message is received from SCP. This patch separates the API for transport of
      image from the wait for `READY` message and also moves the related files to
      the `css/drivers` folder. The previous API `scp_bootloader_transfer` is
      renamed to `css_scp_boot_image_xfer` to reflect the css naming convention.
      This reorganisation also allows easier switch to a different transport
      (eg: Shared Data Structure based transfer) in future
      
      Change-Id: I8a96f9c4616ffde6dbfdf7c18f6f6f8bfa40bbf0
      Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
      74d44a49
  2. 15 Jun, 2017 1 commit
    • jagadeesh ujja's avatar
      CSS:Fix scpi "get_power_state" when ARM_PLAT_MT is set · 878a8bdf
      jagadeesh ujja authored
      
      
      The ARM_PLAT_MT bit enables the support for MT bit in
      MPIDR format. This means that the level 0 affinity
      represents the thread and CPU / Cluster levels are
      at affinity level 1 and 2 respectively.
      This was not catered for in the scpi 'css_scp_get_power_state, API.
      Since the SCPI driver can only cater for single threaded CPUs,
      this patch fixes the problem by catering for this shift by
      effectively ignoring the Thread (level 0) affinity level.
      
      Change-Id: If44f55c9fb2773c8d3f8a9bbcf5420a6f7409dfe
      Signed-off-by: default avatarjagadeesh ujja <jagadeesh.ujja@arm.com>
      878a8bdf
  3. 09 Jun, 2017 1 commit
  4. 05 Jun, 2017 1 commit
    • Soby Mathew's avatar
      CSS: Add SCMI driver for SCP · c04a3b6c
      Soby Mathew authored
      
      
      This patch adds the SCMI driver for communicating with SCP. The power
      domain management and system power management protocol of the SCMI
      specification[1] is implemented in the driver. The SCP power management
      abstraction layer for SCMI for CSS power management is also added.
      
      A new buid option `CSS_USE_SCMI_DRIVER` is introduced to select SCMI
      driver over SCPI.
      
      [1] ARM System Control and Management Interface v1.0 (SCMI)
      Document number: ARM DEN 0056A
      
      Change-Id: I67265615a17e679a2afe810b9b0043711ba09dbb
      Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
      c04a3b6c
  5. 03 May, 2017 1 commit
  6. 20 Apr, 2017 1 commit
    • dp-arm's avatar
      css: Ensure PSCI system off/reset is not interrupted · 0498343a
      dp-arm authored
      
      
      If there is a pending interrupt, it is possible for the AP to come out
      of the final WFI before SCP has a chance to act on it.  Prevent this
      by disabling the GIC CPU interface before issuing a WFI.
      
      Previously, SCP would not wait on WFI before taking an action but
      would shut down the core or system regardless.
      
      Change-Id: Ib0bcf69a515d540ed4f73c11e40ec7c863e39c92
      Signed-off-by: default avatardp-arm <dimitris.papastamos@arm.com>
      0498343a
  7. 27 Mar, 2017 1 commit
    • Summer Qin's avatar
      ARM platforms: Add support for MT bit in MPIDR · d8d6cf24
      Summer Qin authored
      
      
      This patch modifies some of the functions in ARM platform layer to cater
      for the case when multi-threading `MT` is set in MPIDR. A new build flag
      `ARM_PLAT_MT` is added, and when enabled, the functions accessing MPIDR
      now assume that the `MT` bit is set for the platform and access the bit
      fields accordingly.
      
      Also, a new API plat_arm_get_cpu_pe_count is added when `ARM_PLAT_MT` is
      enabled, returning the PE count within the physical cpu corresponding to
      `mpidr`.
      
      Change-Id: I04ccf212ac3054a60882761f4087bae299af13cb
      Signed-off-by: default avatarSummer Qin <summer.qin@arm.com>
      d8d6cf24
  8. 06 Feb, 2017 1 commit
    • Douglas Raillard's avatar
      Replace some memset call by zeromem · 32f0d3c6
      Douglas Raillard authored
      
      
      Replace all use of memset by zeromem when zeroing moderately-sized
      structure by applying the following transformation:
      memset(x, 0, sizeof(x)) => zeromem(x, sizeof(x))
      
      As the Trusted Firmware is compiled with -ffreestanding, it forbids the
      compiler from using __builtin_memset and forces it to generate calls to
      the slow memset implementation. Zeromem is a near drop in replacement
      for this use case, with a more efficient implementation on both AArch32
      and AArch64.
      
      Change-Id: Ia7f3a90e888b96d056881be09f0b4d65b41aa79e
      Signed-off-by: default avatarDouglas Raillard <douglas.raillard@arm.com>
      32f0d3c6
  9. 07 Dec, 2016 1 commit
    • Soby Mathew's avatar
      Introduce SCP power management abstraction · b12a2b49
      Soby Mathew authored
      
      
      This patch introduces an additional layer of abstraction between
      CSS power management hooks and the SCPI driver. A new set of APIs
      are introduced in order to abstract out power management operations
      from underlying communication mechanism with the SCP.
      
      The SCPI and the associated MHU drivers are moved into a `drivers`
      folder in CSS. The new SCP communication abstraction layer is added
      in the `drivers/scp` folder. The existing CSS power management
      uses the new APIs to reflect this abstraction.
      
      Change-Id: I7d775129fc0558e9703c2724523fb8f0a916838c
      Signed-off-by: default avatarSoby Mathew <soby.mathew@arm.com>
      b12a2b49