diff options
Diffstat (limited to 'arch/m68k/bvme6000/bvmeints.c')
| -rw-r--r-- | arch/m68k/bvme6000/bvmeints.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/m68k/bvme6000/bvmeints.c b/arch/m68k/bvme6000/bvmeints.c new file mode 100644 index 00000000000..298a8df0266 --- /dev/null +++ b/arch/m68k/bvme6000/bvmeints.c @@ -0,0 +1,160 @@ +/* + * arch/m68k/bvme6000/bvmeints.c + * + * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk] + * + * based on amiints.c -- Amiga Linux interrupt handling code + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file README.legal in the main directory of this archive + * for more details. + * + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/seq_file.h> + +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/irq.h> +#include <asm/traps.h> + +static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp); + +/* + * This should ideally be 4 elements only, for speed. + */ + +static struct { + irqreturn_t (*handler)(int, void *, struct pt_regs *); + unsigned long flags; + void *dev_id; + const char *devname; + unsigned count; +} irq_tab[256]; + +/* + * void bvme6000_init_IRQ (void) + * + * Parameters: None + * + * Returns: Nothing + * + * This function is called during kernel startup to initialize + * the bvme6000 IRQ handling routines. + */ + +void bvme6000_init_IRQ (void) +{ + int i; + + for (i = 0; i < 256; i++) { + irq_tab[i].handler = bvme6000_defhand; + irq_tab[i].flags = IRQ_FLG_STD; + irq_tab[i].dev_id = NULL; + irq_tab[i].devname = NULL; + irq_tab[i].count = 0; + } +} + +int bvme6000_request_irq(unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id) +{ + if (irq > 255) { + printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname); + return -ENXIO; + } +#if 0 + /* Nothing special about auto-vectored devices for the BVME6000, + * but treat it specially to avoid changes elsewhere. + */ + + if (irq >= VEC_INT1 && irq <= VEC_INT7) + return cpu_request_irq(irq - VEC_SPUR, handler, flags, + devname, dev_id); +#endif + if (!(irq_tab[irq].flags & IRQ_FLG_STD)) { + if (irq_tab[irq].flags & IRQ_FLG_LOCK) { + printk("%s: IRQ %d from %s is not replaceable\n", + __FUNCTION__, irq, irq_tab[irq].devname); + return -EBUSY; + } + if (flags & IRQ_FLG_REPLACE) { + printk("%s: %s can't replace IRQ %d from %s\n", + __FUNCTION__, devname, irq, irq_tab[irq].devname); + return -EBUSY; + } + } + irq_tab[irq].handler = handler; + irq_tab[irq].flags = flags; + irq_tab[irq].dev_id = dev_id; + irq_tab[irq].devname = devname; + return 0; +} + +void bvme6000_free_irq(unsigned int irq, void *dev_id) +{ + if (irq > 255) { + printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq); + return; + } +#if 0 + if (irq >= VEC_INT1 && irq <= VEC_INT7) { + cpu_free_irq(irq - VEC_SPUR, dev_id); + return; + } +#endif + if (irq_tab[irq].dev_id != dev_id) + printk("%s: Removing probably wrong IRQ %d from %s\n", + __FUNCTION__, irq, irq_tab[irq].devname); + + irq_tab[irq].handler = bvme6000_defhand; + irq_tab[irq].flags = IRQ_FLG_STD; + irq_tab[irq].dev_id = NULL; + irq_tab[irq].devname = NULL; +} + +irqreturn_t bvme6000_process_int (unsigned long vec, struct pt_regs *fp) +{ + if (vec > 255) { + printk ("bvme6000_process_int: Illegal vector %ld", vec); + return IRQ_NONE; + } else { + irq_tab[vec].count++; + irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp); + return IRQ_HANDLED; + } +} + +int show_bvme6000_interrupts(struct seq_file *p, void *v) +{ + int i; + + for (i = 0; i < 256; i++) { + if (irq_tab[i].count) + seq_printf(p, "Vec 0x%02x: %8d %s\n", + i, irq_tab[i].count, + irq_tab[i].devname ? irq_tab[i].devname : "free"); + } + return 0; +} + + +static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp) +{ + printk ("Unknown interrupt 0x%02x\n", irq); + return IRQ_NONE; +} + +void bvme6000_enable_irq (unsigned int irq) +{ +} + + +void bvme6000_disable_irq (unsigned int irq) +{ +} + |