1. 17 Feb, 2015 14 commits
  2. 16 Feb, 2015 11 commits
  3. 12 Feb, 2015 1 commit
    • Paul Burton's avatar
      MIPS,prctl: add PR_[GS]ET_FP_MODE prctl options for MIPS · 9791554b
      Paul Burton authored
      Userland code may be built using an ABI which permits linking to objects
      that have more restrictive floating point requirements. For example,
      userland code may be built to target the O32 FPXX ABI. Such code may be
      linked with other FPXX code, or code built for either one of the more
      restrictive FP32 or FP64. When linking with more restrictive code, the
      overall requirement of the process becomes that of the more restrictive
      code. The kernel has no way to know in advance which mode the process
      will need to be executed in, and indeed it may need to change during
      execution. The dynamic loader is the only code which will know the
      overall required mode, and so it needs to have a means to instruct the
      kernel to switch the FP mode of the process.
      
      This patch introduces 2 new options to the prctl syscall which provide
      such a capability. The FP mode of the process is represented as a
      simple bitmask combining a number of mode bits mirroring those present
      in the hardware. Userland can either retrieve the current FP mode of
      the process:
      
        mode = prctl(PR_GET_FP_MODE);
      
      or modify the current FP mode of the process:
      
        err = prctl(PR_SET_FP_MODE, new_mode);
      Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
      Cc: Matthew Fortune <matthew.fortune@imgtec.com>
      Cc: Markos Chandras <markos.chandras@imgtec.com>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/8899/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      9791554b
  4. 05 Feb, 2015 1 commit
    • James Hogan's avatar
      MIPS: cevt-r4k: Drop GIC special case · ae58d882
      James Hogan authored
      The cevt-r4k driver used to call into the GIC driver to find whether the
      timer was pending, but only with External Interrupt Controller (EIC)
      mode, where the Cause.IP bits can't be used as they encode the interrupt
      priority level (Cause.RIPL) instead.
      
      However commit e9de688d ("irqchip: mips-gic: Support local
      interrupts") changed the condition from cpu_has_veic to gic_present.
      This fails on cores such as P5600 which have a GIC but the local
      interrupts aren't routable by the GIC, causing c0_compare_int_usable()
      to consider the interrupt unusable so r4k_clockevent_init() fails.
      
      The previous behaviour, added in commit 98b67c37 ("MIPS: Add EIC
      support for GIC."), wasn't really correct either as far as I can tell,
      since P5600 apparently supports EIC mode too, and in any case the use of
      Cause.TI with r2 should have been sufficient anyway since commit
      010c108d ("MIPS: PowerTV: Fix support for timer interrupts with > 64
      external IRQs").
      
      Therefore drop the call into the gic driver altogether, and add a
      comment in c0_compare_int_pending() to clarify that Cause.TI does get
      checked since MIPS r2.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Fixes: e9de688d ("irqchip: mips-gic: Support local interrupts")
      Reviewed-by: default avatarAndrew Bresticker <abrestic@chromium.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Steven J. Hill <steven.hill@imgtec.com>
      Cc: Qais Yousef <qais.yousef@imgtec.com>
      Cc: Jason Cooper <jason@lakedaemon.net>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: linux-mips@linux-mips.org
      Patchwork: https://patchwork.linux-mips.org/patch/9077/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      ae58d882
  5. 04 Feb, 2015 1 commit
  6. 16 Jan, 2015 2 commits
  7. 13 Jan, 2015 8 commits
  8. 11 Jan, 2015 2 commits