diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.18/032-MIPS-Provide-a-generic-plat_irq_dispatch.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.18/032-MIPS-Provide-a-generic-plat_irq_dispatch.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.18/032-MIPS-Provide-a-generic-plat_irq_dispatch.patch b/target/linux/brcm63xx/patches-3.18/032-MIPS-Provide-a-generic-plat_irq_dispatch.patch new file mode 100644 index 0000000000..79a0436dc6 --- /dev/null +++ b/target/linux/brcm63xx/patches-3.18/032-MIPS-Provide-a-generic-plat_irq_dispatch.patch @@ -0,0 +1,58 @@ +From 85f7cdacbb81db8c4cc8e474837eab1f0e4ff77b Mon Sep 17 00:00:00 2001 +From: Andrew Bresticker <abrestic@chromium.org> +Date: Thu, 18 Sep 2014 14:47:09 -0700 +Subject: [PATCH 3/3] MIPS: Provide a generic plat_irq_dispatch + +For platforms which boot with device-tree or have correctly chained +all external interrupt controllers, a generic plat_irq_dispatch() can +be used. Implement a plat_irq_dispatch() which simply handles all the +pending interrupts as reported by C0_Cause. + +Signed-off-by: Andrew Bresticker <abrestic@chromium.org> +Reviewed-by: Qais Yousef <qais.yousef@imgtec.com> +Tested-by: Qais Yousef <qais.yousef@imgtec.com> +Cc: Thomas Gleixner <tglx@linutronix.de> +Cc: Jason Cooper <jason@lakedaemon.net> +Cc: Andrew Bresticker <abrestic@chromium.org> +Cc: Jeffrey Deans <jeffrey.deans@imgtec.com> +Cc: Markos Chandras <markos.chandras@imgtec.com> +Cc: Paul Burton <paul.burton@imgtec.com> +Cc: Qais Yousef <qais.yousef@imgtec.com> +Cc: Jonas Gorski <jogo@openwrt.org> +Cc: John Crispin <blogic@openwrt.org> +Cc: David Daney <ddaney.cavm@gmail.com> +Cc: linux-mips@linux-mips.org +Cc: linux-kernel@vger.kernel.org +Patchwork: https://patchwork.linux-mips.org/patch/7801/ +Signed-off-by: Ralf Baechle <ralf@linux-mips.org> +--- + arch/mips/kernel/irq_cpu.c | 18 ++++++++++++++++++ + 1 file changed, 18 insertions(+) + +--- a/arch/mips/kernel/irq_cpu.c ++++ b/arch/mips/kernel/irq_cpu.c +@@ -94,6 +94,24 @@ static struct irq_chip mips_mt_cpu_irq_c + .irq_eoi = unmask_mips_irq, + }; + ++asmlinkage void __weak plat_irq_dispatch(void) ++{ ++ unsigned long pending = read_c0_cause() & read_c0_status() & ST0_IM; ++ int irq; ++ ++ if (!pending) { ++ spurious_interrupt(); ++ return; ++ } ++ ++ pending >>= CAUSEB_IP; ++ while (pending) { ++ irq = fls(pending) - 1; ++ do_IRQ(MIPS_CPU_IRQ_BASE + irq); ++ pending &= ~BIT(irq); ++ } ++} ++ + static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) + { |