diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68knommu/platform/5307/ints.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68knommu/platform/5307/ints.c')
-rw-r--r-- | arch/m68knommu/platform/5307/ints.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/5307/ints.c b/arch/m68knommu/platform/5307/ints.c new file mode 100644 index 00000000000..0117754d44f --- /dev/null +++ b/arch/m68knommu/platform/5307/ints.c @@ -0,0 +1,280 @@ +/* + * linux/arch/m68knommu/kernel/ints.c -- General interrupt handling code + * + * Copyright (C) 1999-2002 Greg Ungerer (gerg@snapgear.com) + * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * + * Based on: + * + * linux/arch/m68k/kernel/ints.c -- Linux/m68k general interrupt handling code + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/kernel_stat.h> +#include <linux/errno.h> +#include <linux/config.h> +#include <linux/seq_file.h> + +#include <asm/system.h> +#include <asm/irq.h> +#include <asm/traps.h> +#include <asm/page.h> +#include <asm/machdep.h> + +/* + * This table stores the address info for each vector handler. + */ +irq_handler_t irq_list[SYS_IRQS]; + +#define NUM_IRQ_NODES 16 +static irq_node_t nodes[NUM_IRQ_NODES]; + +/* The number of spurious interrupts */ +volatile unsigned int num_spurious; + +unsigned int local_bh_count[NR_CPUS]; +unsigned int local_irq_count[NR_CPUS]; + +static irqreturn_t default_irq_handler(int irq, void *ptr, struct pt_regs *regs) +{ +#if 1 + printk(KERN_INFO "%s(%d): default irq handler vec=%d [0x%x]\n", + __FILE__, __LINE__, irq, irq); +#endif + return(IRQ_HANDLED); +} + +/* + * void init_IRQ(void) + * + * Parameters: None + * + * Returns: Nothing + * + * This function should be called during kernel startup to initialize + * the IRQ handling routines. + */ + +void __init init_IRQ(void) +{ + int i; + + for (i = 0; i < SYS_IRQS; i++) { + if (mach_default_handler) + irq_list[i].handler = (*mach_default_handler)[i]; + else + irq_list[i].handler = default_irq_handler; + irq_list[i].flags = IRQ_FLG_STD; + irq_list[i].dev_id = NULL; + irq_list[i].devname = NULL; + } + + for (i = 0; i < NUM_IRQ_NODES; i++) + nodes[i].handler = NULL; + + if (mach_init_IRQ) + mach_init_IRQ(); +} + +irq_node_t *new_irq_node(void) +{ + irq_node_t *node; + short i; + + for (node = nodes, i = NUM_IRQ_NODES-1; i >= 0; node++, i--) + if (!node->handler) + return node; + + printk(KERN_INFO "new_irq_node: out of nodes\n"); + return NULL; +} + +int request_irq( + unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, + const char *devname, + void *dev_id) +{ + if (irq < 0 || irq >= NR_IRQS) { + printk(KERN_WARNING "%s: Incorrect IRQ %d from %s\n", __FUNCTION__, + irq, devname); + return -ENXIO; + } + + if (!(irq_list[irq].flags & IRQ_FLG_STD)) { + if (irq_list[irq].flags & IRQ_FLG_LOCK) { + printk(KERN_WARNING "%s: IRQ %d from %s is not replaceable\n", + __FUNCTION__, irq, irq_list[irq].devname); + return -EBUSY; + } + if (flags & IRQ_FLG_REPLACE) { + printk(KERN_WARNING "%s: %s can't replace IRQ %d from %s\n", + __FUNCTION__, devname, irq, irq_list[irq].devname); + return -EBUSY; + } + } + + if (flags & IRQ_FLG_FAST) { + extern asmlinkage void fasthandler(void); + extern void set_evector(int vecnum, void (*handler)(void)); + set_evector(irq, fasthandler); + } + + irq_list[irq].handler = handler; + irq_list[irq].flags = flags; + irq_list[irq].dev_id = dev_id; + irq_list[irq].devname = devname; + return 0; +} + +EXPORT_SYMBOL(request_irq); + +void free_irq(unsigned int irq, void *dev_id) +{ + if (irq >= NR_IRQS) { + printk(KERN_WARNING "%s: Incorrect IRQ %d\n", __FUNCTION__, irq); + return; + } + + if (irq_list[irq].dev_id != dev_id) + printk(KERN_WARNING "%s: Removing probably wrong IRQ %d from %s\n", + __FUNCTION__, irq, irq_list[irq].devname); + + if (irq_list[irq].flags & IRQ_FLG_FAST) { + extern asmlinkage void inthandler(void); + extern void set_evector(int vecnum, void (*handler)(void)); + set_evector(irq, inthandler); + } + + if (mach_default_handler) + irq_list[irq].handler = (*mach_default_handler)[irq]; + else + irq_list[irq].handler = default_irq_handler; + irq_list[irq].flags = IRQ_FLG_STD; + irq_list[irq].dev_id = NULL; + irq_list[irq].devname = NULL; +} + +EXPORT_SYMBOL(free_irq); + + +int sys_request_irq(unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id) +{ + if (irq > IRQ7) { + printk(KERN_WARNING "%s: Incorrect IRQ %d from %s\n", + __FUNCTION__, irq, devname); + return -ENXIO; + } + +#if 0 + if (!(irq_list[irq].flags & IRQ_FLG_STD)) { + if (irq_list[irq].flags & IRQ_FLG_LOCK) { + printk(KERN_WARNING "%s: IRQ %d from %s is not replaceable\n", + __FUNCTION__, irq, irq_list[irq].devname); + return -EBUSY; + } + if (!(flags & IRQ_FLG_REPLACE)) { + printk(KERN_WARNING "%s: %s can't replace IRQ %d from %s\n", + __FUNCTION__, devname, irq, irq_list[irq].devname); + return -EBUSY; + } + } +#endif + + irq_list[irq].handler = handler; + irq_list[irq].flags = flags; + irq_list[irq].dev_id = dev_id; + irq_list[irq].devname = devname; + return 0; +} + +void sys_free_irq(unsigned int irq, void *dev_id) +{ + if (irq > IRQ7) { + printk(KERN_WARNING "%s: Incorrect IRQ %d\n", __FUNCTION__, irq); + return; + } + + if (irq_list[irq].dev_id != dev_id) + printk(KERN_WARNING "%s: Removing probably wrong IRQ %d from %s\n", + __FUNCTION__, irq, irq_list[irq].devname); + + irq_list[irq].handler = (*mach_default_handler)[irq]; + irq_list[irq].flags = 0; + irq_list[irq].dev_id = NULL; + irq_list[irq].devname = NULL; +} + +/* + * Do we need these probe functions on the m68k? + * + * ... may be useful with ISA devices + */ +unsigned long probe_irq_on (void) +{ + return 0; +} + +EXPORT_SYMBOL(probe_irq_on); + +int probe_irq_off (unsigned long irqs) +{ + return 0; +} + +EXPORT_SYMBOL(probe_irq_off); + +asmlinkage void process_int(unsigned long vec, struct pt_regs *fp) +{ + if (vec >= VEC_INT1 && vec <= VEC_INT7) { + vec -= VEC_SPUR; + kstat_cpu(0).irqs[vec]++; + irq_list[vec].handler(vec, irq_list[vec].dev_id, fp); + } else { + if (mach_process_int) + mach_process_int(vec, fp); + else + panic("Can't process interrupt vector %ld\n", vec); + return; + } +} + + +int show_interrupts(struct seq_file *p, void *v) +{ + int i = *(loff_t *) v; + + if (i < NR_IRQS) { + if (! (irq_list[i].flags & IRQ_FLG_STD)) { + seq_printf(p, "%3d: %10u ", i, + (i ? kstat_cpu(0).irqs[i] : num_spurious)); + if (irq_list[i].flags & IRQ_FLG_LOCK) + seq_printf(p, "L "); + else + seq_printf(p, " "); + seq_printf(p, "%s\n", irq_list[i].devname); + } + } + + if (i == NR_IRQS && mach_get_irq_list) + mach_get_irq_list(p, v); + return 0; +} + +void init_irq_proc(void) +{ + /* Insert /proc/irq driver here */ +} + |