From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/powerpc/platforms/86xx/pic.c | 71 ++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 kernel/arch/powerpc/platforms/86xx/pic.c (limited to 'kernel/arch/powerpc/platforms/86xx/pic.c') diff --git a/kernel/arch/powerpc/platforms/86xx/pic.c b/kernel/arch/powerpc/platforms/86xx/pic.c new file mode 100644 index 000000000..d5b98c0f9 --- /dev/null +++ b/kernel/arch/powerpc/platforms/86xx/pic.c @@ -0,0 +1,71 @@ +/* + * Copyright 2008 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include +#include +#include +#include +#include + +#include +#include + +#ifdef CONFIG_PPC_I8259 +static void mpc86xx_8259_cascade(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned int cascade_irq = i8259_irq(); + + if (cascade_irq != NO_IRQ) + generic_handle_irq(cascade_irq); + + chip->irq_eoi(&desc->irq_data); +} +#endif /* CONFIG_PPC_I8259 */ + +void __init mpc86xx_init_irq(void) +{ +#ifdef CONFIG_PPC_I8259 + struct device_node *np; + struct device_node *cascade_node = NULL; + int cascade_irq; +#endif + + struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | + MPIC_SINGLE_DEST_CPU, + 0, 256, " MPIC "); + BUG_ON(mpic == NULL); + + mpic_init(mpic); + +#ifdef CONFIG_PPC_I8259 + /* Initialize i8259 controller */ + for_each_node_by_type(np, "interrupt-controller") + if (of_device_is_compatible(np, "chrp,iic")) { + cascade_node = np; + break; + } + + if (cascade_node == NULL) { + printk(KERN_DEBUG "Could not find i8259 PIC\n"); + return; + } + + cascade_irq = irq_of_parse_and_map(cascade_node, 0); + if (cascade_irq == NO_IRQ) { + printk(KERN_ERR "Failed to map cascade interrupt\n"); + return; + } + + i8259_init(cascade_node, 0); + of_node_put(cascade_node); + + irq_set_chained_handler(cascade_irq, mpc86xx_8259_cascade); +#endif +} -- cgit 1.2.3-korg