1. 12 Oct, 2016 1 commit
    • dp-arm's avatar
      Add PMF instrumentation points in TF · 872be88a
      dp-arm authored
      
      
      In order to quantify the overall time spent in the PSCI software
      implementation, an initial collection of PMF instrumentation points
      has been added.
      
      Instrumentation has been added to the following code paths:
      
      - Entry to PSCI SMC handler.  The timestamp is captured as early
        as possible during the runtime exception and stored in memory
        before entering the PSCI SMC handler.
      
      - Exit from PSCI SMC handler.  The timestamp is captured after
        normal return from the PSCI SMC handler or if a low power state
        was requested it is captured in the bl31 warm boot path before
        return to normal world.
      
      - Entry to low power state.  The timestamp is captured before entry
        to a low power state which implies either standby or power down.
        As these power states are mutually exclusive, only one timestamp
        is defined to describe both.  It is possible to differentiate between
        the two power states using the PSCI STAT interface.
      
      - Exit from low power state.  The timestamp is captured after a standby
        or power up operation has completed.
      
      To calculate the number of cycles spent running code in Trusted Firmware
      one can perform the following calculation:
      
      (exit_psci - enter_psci) - (exit_low_pwr - enter_low_pwr).
      
      The resulting number of cycles can be converted to time given the
      frequency of the counter.
      
      Change-Id: Ie3b8f3d16409b6703747093b3a2d5c7429ad0166
      Signed-off-by: default avatardp-arm <dimitris.papastamos@arm.com>
      872be88a
  2. 22 Sep, 2016 1 commit
    • Soby Mathew's avatar
      PSCI: Do psci_setup() as part of std_svc_setup() · 58e946ae
      Soby Mathew authored
      This patch moves the invocation of `psci_setup()` from BL31 and SP_MIN
      into `std_svc_setup()` as part of ARM Standard Service initialization.
      This allows us to consolidate ARM Standard Service initializations which
      will be added to in the future. A new function `get_arm_std_svc_args()`
      is introduced to get arguments corresponding to each standard service.
      This function must be implemented by the EL3 Runtime Firmware and both
      SP_MIN and BL31 implement it.
      
      Change-Id: I38e1b644f797fa4089b20574bd4a10f0419de184
      58e946ae
  3. 19 Jul, 2016 1 commit
    • Soby Mathew's avatar
      Introduce PSCI Library Interface · cf0b1492
      Soby Mathew authored
      This patch introduces the PSCI Library interface. The major changes
      introduced are as follows:
      
      * Earlier BL31 was responsible for Architectural initialization during cold
      boot via bl31_arch_setup() whereas PSCI was responsible for the same during
      warm boot. This functionality is now consolidated by the PSCI library
      and it does Architectural initialization via psci_arch_setup() during both
      cold and warm boots.
      
      * Earlier the warm boot entry point was always `psci_entrypoint()`. This was
      not flexible enough as a library interface. Now PSCI expects the runtime
      firmware to provide the entry point via `psci_setup()`. A new function
      `bl31_warm_entrypoint` is introduced in BL31 and the previous
      `psci_entrypoint()` is deprecated.
      
      * The `smc_helpers.h` is reorganized to separate the SMC Calling Convention
      defines from the Trusted Firmware SMC helpers. The former is now in a new
      header file `smcc.h` and the SMC helpers are moved to Architecture specific
      header.
      
      * The CPU context is used by PSCI for context initialization and
      restoration after power down (PSCI Context). It is also used by BL31 for SMC
      handling and context management during Normal-Secure world switch (SMC
      Context). The `psci_smc_handler()` interface is redefined to not use SMC
      helper macros thus enabling to decouple the PSCI context from EL3 runtime
      firmware SMC context. This enables PSCI to be integrated with other runtime
      firmware using a different SMC context.
      
      NOTE: With this patch the architectural setup done in `bl31_arch_setup()`
      is done as part of `psci_setup()` and hence `bl31_platform_setup()` will be
      invoked prior to architectural setup. It is highly unlikely that the platform
      setup will depend on architectural setup and cause any failure. Please be
      be aware of this change in sequence.
      
      Change-Id: I7f497a08d33be234bbb822c28146250cb20dab73
      cf0b1492
  4. 18 Jul, 2016 1 commit
    • Soby Mathew's avatar
      Rework type usage in Trusted Firmware · 4c0d0390
      Soby Mathew authored
      This patch reworks type usage in generic code, drivers and ARM platform files
      to make it more portable. The major changes done with respect to
      type usage are as listed below:
      
      * Use uintptr_t for storing address instead of uint64_t or unsigned long.
      * Review usage of unsigned long as it can no longer be assumed to be 64 bit.
      * Use u_register_t for register values whose width varies depending on
        whether AArch64 or AArch32.
      * Use generic C types where-ever possible.
      
      In addition to the above changes, this patch also modifies format specifiers
      in print invocations so that they are AArch64/AArch32 agnostic. Only files
      related to upcoming feature development have been reworked.
      
      Change-Id: I9f8c78347c5a52ba7027ff389791f1dad63ee5f8
      4c0d0390
  5. 06 May, 2014 3 commits
    • Dan Handley's avatar
      Reduce deep nesting of header files · 97043ac9
      Dan Handley authored
      Reduce the number of header files included from other header
      files as much as possible without splitting the files. Use forward
      declarations where possible. This allows removal of some unnecessary
      "#ifndef __ASSEMBLY__" statements.
      
      Also, review the .c and .S files for which header files really need
      including and reorder the #include statements alphabetically.
      
      Fixes ARM-software/tf-issues#31
      
      Change-Id: Iec92fb976334c77453e010b60bcf56f3be72bd3e
      97043ac9
    • Dan Handley's avatar
      Move PSCI global functions out of private header · c5945735
      Dan Handley authored
      Move the PSCI global functions out of psci_private.h and into
      psci.h to allow the standard service to only depend on psci.h.
      
      Change-Id: I8306924a3814b46e70c1dcc12524c7aefe06eed1
      c5945735
    • Dan Handley's avatar
      Make use of user/system includes more consistent · 35e98e55
      Dan Handley authored
      Make codebase consistent in its use of #include "" syntax for
      user includes and #include <> syntax for system includes.
      
      Fixes ARM-software/tf-issues#65
      
      Change-Id: If2f7c4885173b1fd05ac2cde5f1c8a07000c7a33
      35e98e55
  6. 20 Mar, 2014 1 commit
    • Jeenu Viswambharan's avatar
      Implement ARM Standard Service · 64f6ea9b
      Jeenu Viswambharan authored
      This patch implements ARM Standard Service as a runtime service and adds
      support for call count, UID and revision information SMCs. The existing
      PSCI implementation is subsumed by the Standard Service calls and all
      PSCI calls are therefore dispatched by the Standard Service to the PSCI
      handler.
      
      At present, PSCI is the only specification under Standard Service. Thus
      call count returns the number of PSCI calls implemented. As this is the
      initial implementation, a revision number of 0.1 is returned for call
      revision.
      
      Fixes ARM-software/tf-issues#62
      
      Change-Id: I6d4273f72ad6502636efa0f872e288b191a64bc1
      64f6ea9b