1 /* 2 * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file COPYING in the main directory of this archive 6 * for more details. 7 */ 8 9 #include <linux/types.h> 10 #include <linux/kernel.h> 11 #include <linux/sched.h> 12 #include <linux/kernel_stat.h> 13 #include <linux/interrupt.h> 14 #include <asm/segment.h> 15 #include <asm/intersil.h> 16 #include <asm/oplib.h> 17 #include <asm/sun3ints.h> 18 #include <asm/irq_regs.h> 19 #include <linux/seq_file.h> 20 21 extern void sun3_leds (unsigned char); 22 23 void sun3_disable_interrupts(void) 24 { 25 sun3_disable_irq(0); 26 } 27 28 void sun3_enable_interrupts(void) 29 { 30 sun3_enable_irq(0); 31 } 32 33 static int led_pattern[8] = { 34 ~(0x80), ~(0x01), 35 ~(0x40), ~(0x02), 36 ~(0x20), ~(0x04), 37 ~(0x10), ~(0x08) 38 }; 39 40 volatile unsigned char* sun3_intreg; 41 42 void sun3_enable_irq(unsigned int irq) 43 { 44 *sun3_intreg |= (1 << irq); 45 } 46 47 void sun3_disable_irq(unsigned int irq) 48 { 49 *sun3_intreg &= ~(1 << irq); 50 } 51 52 static irqreturn_t sun3_int7(int irq, void *dev_id) 53 { 54 unsigned int cnt; 55 56 cnt = kstat_irqs_cpu(irq, 0); 57 if (!(cnt % 2000)) 58 sun3_leds(led_pattern[cnt % 16000 / 2000]); 59 return IRQ_HANDLED; 60 } 61 62 static irqreturn_t sun3_int5(int irq, void *dev_id) 63 { 64 unsigned long flags; 65 unsigned int cnt; 66 67 local_irq_save(flags); 68 #ifdef CONFIG_SUN3 69 intersil_clear(); 70 #endif 71 sun3_disable_irq(5); 72 sun3_enable_irq(5); 73 #ifdef CONFIG_SUN3 74 intersil_clear(); 75 #endif 76 legacy_timer_tick(1); 77 cnt = kstat_irqs_cpu(irq, 0); 78 if (!(cnt % 20)) 79 sun3_leds(led_pattern[cnt % 160 / 20]); 80 local_irq_restore(flags); 81 return IRQ_HANDLED; 82 } 83 84 static irqreturn_t sun3_vec255(int irq, void *dev_id) 85 { 86 return IRQ_HANDLED; 87 } 88 89 void __init sun3_init_IRQ(void) 90 { 91 *sun3_intreg = 1; 92 93 m68k_setup_user_interrupt(VEC_USER, 128); 94 95 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL)) 96 pr_err("Couldn't register %s interrupt\n", "int5"); 97 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL)) 98 pr_err("Couldn't register %s interrupt\n", "int7"); 99 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL)) 100 pr_err("Couldn't register %s interrupt\n", "vec255"); 101 } 102