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/intersil.h> 15 #include <asm/oplib.h> 16 #include <asm/sun3ints.h> 17 #include <asm/irq_regs.h> 18 #include <linux/seq_file.h> 19 20 extern void sun3_leds (unsigned char); 21 22 void sun3_disable_interrupts(void) 23 { 24 sun3_disable_irq(0); 25 } 26 27 void sun3_enable_interrupts(void) 28 { 29 sun3_enable_irq(0); 30 } 31 32 static int led_pattern[8] = { 33 ~(0x80), ~(0x01), 34 ~(0x40), ~(0x02), 35 ~(0x20), ~(0x04), 36 ~(0x10), ~(0x08) 37 }; 38 39 volatile unsigned char* sun3_intreg; 40 41 void sun3_enable_irq(unsigned int irq) 42 { 43 *sun3_intreg |= (1 << irq); 44 } 45 46 void sun3_disable_irq(unsigned int irq) 47 { 48 *sun3_intreg &= ~(1 << irq); 49 } 50 51 static irqreturn_t sun3_int7(int irq, void *dev_id) 52 { 53 unsigned int cnt; 54 55 cnt = kstat_irqs_cpu(irq, 0); 56 if (!(cnt % 2000)) 57 sun3_leds(led_pattern[cnt % 16000 / 2000]); 58 return IRQ_HANDLED; 59 } 60 61 static irqreturn_t sun3_int5(int irq, void *dev_id) 62 { 63 unsigned long flags; 64 unsigned int cnt; 65 66 local_irq_save(flags); 67 #ifdef CONFIG_SUN3 68 intersil_clear(); 69 #endif 70 sun3_disable_irq(5); 71 sun3_enable_irq(5); 72 #ifdef CONFIG_SUN3 73 intersil_clear(); 74 #endif 75 legacy_timer_tick(1); 76 cnt = kstat_irqs_cpu(irq, 0); 77 if (!(cnt % 20)) 78 sun3_leds(led_pattern[cnt % 160 / 20]); 79 local_irq_restore(flags); 80 return IRQ_HANDLED; 81 } 82 83 static irqreturn_t sun3_vec255(int irq, void *dev_id) 84 { 85 return IRQ_HANDLED; 86 } 87 88 void __init sun3_init_IRQ(void) 89 { 90 *sun3_intreg = 1; 91 92 m68k_setup_user_interrupt(VEC_USER, 128); 93 94 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL)) 95 pr_err("Couldn't register %s interrupt\n", "int5"); 96 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL)) 97 pr_err("Couldn't register %s interrupt\n", "int7"); 98 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL)) 99 pr_err("Couldn't register %s interrupt\n", "vec255"); 100 } 101