/* * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux 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/config.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/kernel_stat.h> #include <linux/interrupt.h> #include <asm/segment.h> #include <asm/intersil.h> #include <asm/oplib.h> #include <asm/sun3ints.h> #include <linux/seq_file.h> extern void sun3_leds (unsigned char); static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp); void sun3_disable_interrupts(void) { sun3_disable_irq(0); } void sun3_enable_interrupts(void) { sun3_enable_irq(0); } int led_pattern[8] = { ~(0x80), ~(0x01), ~(0x40), ~(0x02), ~(0x20), ~(0x04), ~(0x10), ~(0x08) }; volatile unsigned char* sun3_intreg; void sun3_insert_irq(irq_node_t **list, irq_node_t *node) { } void sun3_delete_irq(irq_node_t **list, void *dev_id) { } void sun3_enable_irq(unsigned int irq) { *sun3_intreg |= (1<<irq); } void sun3_disable_irq(unsigned int irq) { *sun3_intreg &= ~(1<<irq); } inline void sun3_do_irq(int irq, struct pt_regs *fp) { kstat_cpu(0).irqs[SYS_IRQS + irq]++; *sun3_intreg &= ~(1<<irq); *sun3_intreg |= (1<<irq); } static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp) { sun3_do_irq(irq,fp); if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 2000)) sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%16000) /2000]); return IRQ_HANDLED; } static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp) { kstat_cpu(0).irqs[SYS_IRQS + irq]++; #ifdef CONFIG_SUN3 intersil_clear(); #endif *sun3_intreg &= ~(1<<irq); *sun3_intreg |= (1<<irq); #ifdef CONFIG_SUN3 intersil_clear(); #endif do_timer(fp); #ifndef CONFIG_SMP update_process_times(user_mode(fp)); #endif if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 20)) sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%160) /20]); return IRQ_HANDLED; } /* handle requested ints, excepting 5 and 7, which always do the same thing */ irqreturn_t (*sun3_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = { [0] = sun3_inthandle, [1] = sun3_inthandle, [2] = sun3_inthandle, [3] = sun3_inthandle, [4] = sun3_inthandle, [5] = sun3_int5, [6] = sun3_inthandle, [7] = sun3_int7 }; static const char *dev_names[SYS_IRQS] = { [5] = "timer", [7] = "int7 handler" }; static void *dev_ids[SYS_IRQS]; static irqreturn_t (*sun3_inthandler[SYS_IRQS])(int, void *, struct pt_regs *) = { [5] = sun3_int5, [7] = sun3_int7 }; static irqreturn_t (*sun3_vechandler[SUN3_INT_VECS])(int, void *, struct pt_regs *); static void *vec_ids[SUN3_INT_VECS]; static const char *vec_names[SUN3_INT_VECS]; static int vec_ints[SUN3_INT_VECS]; int show_sun3_interrupts(struct seq_file *p, void *v) { int i; for(i = 0; i < (SUN3_INT_VECS-1); i++) { if(sun3_vechandler[i] != NULL) { seq_printf(p, "vec %3d: %10u %s\n", i+64, vec_ints[i], (vec_names[i]) ? vec_names[i] : "sun3_vechandler"); } } return 0; } static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp) { if(sun3_inthandler[irq] == NULL) panic ("bad interrupt %d received (id %p)\n",irq, dev_id); kstat_cpu(0).irqs[SYS_IRQS + irq]++; *sun3_intreg &= ~(1<<irq); sun3_inthandler[irq](irq, dev_ids[irq], fp); return IRQ_HANDLED; } static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp) { // intersil_clear(); return IRQ_HANDLED; } void sun3_init_IRQ(void) { int i; *sun3_intreg = 1; for(i = 0; i < SYS_IRQS; i++) { if(dev_names[i]) cpu_request_irq(i, sun3_default_handler[i], 0, dev_names[i], NULL); } for(i = 0; i < 192; i++) sun3_vechandler[i] = NULL; sun3_vechandler[191] = sun3_vec255; } int sun3_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id) { if(irq < SYS_IRQS) { if(sun3_inthandler[irq] != NULL) { printk("sun3_request_irq: request for irq %d -- already taken!\n", irq); return 1; } sun3_inthandler[irq] = handler; dev_ids[irq] = dev_id; dev_names[irq] = devname; /* setting devname would be nice */ cpu_request_irq(irq, sun3_default_handler[irq], 0, devname, NULL); return 0; } else { if((irq >= 64) && (irq <= 255)) { int vec; vec = irq - 64; if(sun3_vechandler[vec] != NULL) { printk("sun3_request_irq: request for vec %d -- already taken!\n", irq); return 1; } sun3_vechandler[vec] = handler; vec_ids[vec] = dev_id; vec_names[vec] = devname; vec_ints[vec] = 0; return 0; } } printk("sun3_request_irq: invalid irq %d\n", irq); return 1; } void sun3_free_irq(unsigned int irq, void *dev_id) { if(irq < SYS_IRQS) { if(sun3_inthandler[irq] == NULL) panic("sun3_free_int: attempt to free unused irq %d\n", irq); if(dev_ids[irq] != dev_id) panic("sun3_free_int: incorrect dev_id for irq %d\n", irq); sun3_inthandler[irq] = NULL; return; } else if((irq >= 64) && (irq <= 255)) { int vec; vec = irq - 64; if(sun3_vechandler[vec] == NULL) panic("sun3_free_int: attempt to free unused vector %d\n", irq); if(vec_ids[irq] != dev_id) panic("sun3_free_int: incorrect dev_id for vec %d\n", irq); sun3_vechandler[vec] = NULL; return; } else { panic("sun3_free_irq: invalid irq %d\n", irq); } } irqreturn_t sun3_process_int(int irq, struct pt_regs *regs) { if((irq >= 64) && (irq <= 255)) { int vec; vec = irq - 64; if(sun3_vechandler[vec] == NULL) panic ("bad interrupt vector %d received\n",irq); vec_ints[vec]++; return sun3_vechandler[vec](irq, vec_ids[vec], regs); } else { panic("sun3_process_int: unable to handle interrupt vector %d\n", irq); } }