irqchip: irq-mips-gic: Provide function to map GIC user section
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: NAlex Smith <alex.smith@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com> Reviewed-by: NMarc 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: NRalf Baechle <ralf@linux-mips.org>
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