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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/mips/loongson/common/irq.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
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 <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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 <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/mips/loongson/common/irq.c')
-rw-r--r-- | kernel/arch/mips/loongson/common/irq.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/kernel/arch/mips/loongson/common/irq.c b/kernel/arch/mips/loongson/common/irq.c new file mode 100644 index 000000000..687003b19 --- /dev/null +++ b/kernel/arch/mips/loongson/common/irq.c @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2007 Lemote Inc. & Insititute of Computing Technology + * Author: Fuxin Zhang, zhangfx@lemote.com + * + * 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 <linux/delay.h> +#include <linux/interrupt.h> + +#include <loongson.h> +/* + * the first level int-handler will jump here if it is a bonito irq + */ +void bonito_irqdispatch(void) +{ + u32 int_status; + int i; + + /* workaround the IO dma problem: let cpu looping to allow DMA finish */ + int_status = LOONGSON_INTISR; + while (int_status & (1 << 10)) { + udelay(1); + int_status = LOONGSON_INTISR; + } + + /* Get pending sources, masked by current enables */ + int_status = LOONGSON_INTISR & LOONGSON_INTEN; + + if (int_status) { + i = __ffs(int_status); + do_IRQ(LOONGSON_IRQ_BASE + i); + } +} + +asmlinkage void plat_irq_dispatch(void) +{ + unsigned int pending; + + pending = read_c0_cause() & read_c0_status() & ST0_IM; + + /* machine-specific plat_irq_dispatch */ + mach_irq_dispatch(pending); +} + +void __init arch_init_irq(void) +{ + /* + * Clear all of the interrupts while we change the able around a bit. + * int-handler is not on bootstrap + */ + clear_c0_status(ST0_IM | ST0_BEV); + + /* no steer */ + LOONGSON_INTSTEER = 0; + + /* + * Mask out all interrupt by writing "1" to all bit position in + * the interrupt reset reg. + */ + LOONGSON_INTENCLR = ~0; + + /* machine specific irq init */ + mach_init_irq(); +} |