• Alex Smith's avatar
    irqchip: irq-mips-gic: Provide function to map GIC user section · c0a9f72c
    Alex Smith authored
    The GIC provides a "user-mode visible" section containing a mirror of
    the counter registers which can be mapped into user memory. This will
    be used by the VDSO time function implementations, so provide a
    function to map it in.
    
    When the GIC is not enabled in Kconfig a dummy inline version of this
    function is provided, along with "#define gic_present 0", so that we
    don't have to litter the VDSO code with ifdefs.
    
    [markos.chandras@imgtec.com:
      - Move mapping code to arch/mips/kernel/vdso.c and use a resource
        type to get the GIC usermode information
      - Avoid renaming function arguments and use __gic_base_addr to hold
        the base GIC address prior to ioremap.]
    [ralf@linux-mips.org: Fix up gic_get_usm_range() to compile and make inline
    again.]
    Signed-off-by: default avatarAlex Smith <alex.smith@imgtec.com>
    Signed-off-by: default avatarMarkos Chandras <markos.chandras@imgtec.com>
    Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Jason Cooper <jason@lakedaemon.net>
    Cc: Marc Zyngier <marc.zyngier@arm.com>
    Cc: Alex Smith <alex.smith@imgtec.com>
    Cc: Markos Chandras <markos.chandras@imgtec.com>
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-mips@linux-mips.org
    Patchwork: http://patchwork.linux-mips.org/patch/11281/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
    c0a9f72c
irq-mips-gic.c 22.8 KB