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 *sun3_intreg |= (1 << irq); 55 if (!(kstat_cpu(0).irqs[irq] % 2000)) 56 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]); 57 return IRQ_HANDLED; 58 } 59 60 static irqreturn_t sun3_int5(int irq, void *dev_id) 61 { 62 #ifdef CONFIG_SUN3 63 intersil_clear(); 64 #endif 65 *sun3_intreg |= (1 << irq); 66 #ifdef CONFIG_SUN3 67 intersil_clear(); 68 #endif 69 xtime_update(1); 70 update_process_times(user_mode(get_irq_regs())); 71 if (!(kstat_cpu(0).irqs[irq] % 20)) 72 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]); 73 return IRQ_HANDLED; 74 } 75 76 static irqreturn_t sun3_vec255(int irq, void *dev_id) 77 { 78 // intersil_clear(); 79 return IRQ_HANDLED; 80 } 81 82 static void sun3_inthandle(unsigned int irq, struct pt_regs *fp) 83 { 84 *sun3_intreg &= ~(1 << irq); 85 86 __m68k_handle_int(irq, fp); 87 } 88 89 static struct irq_controller sun3_irq_controller = { 90 .name = "sun3", 91 .lock = __SPIN_LOCK_UNLOCKED(sun3_irq_controller.lock), 92 .startup = m68k_irq_startup, 93 .shutdown = m68k_irq_shutdown, 94 .enable = sun3_enable_irq, 95 .disable = sun3_disable_irq, 96 }; 97 98 void __init sun3_init_IRQ(void) 99 { 100 *sun3_intreg = 1; 101 102 m68k_setup_auto_interrupt(sun3_inthandle); 103 m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7); 104 m68k_setup_user_interrupt(VEC_USER, 128, NULL); 105 106 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL)) 107 pr_err("Couldn't register %s interrupt\n", "int5"); 108 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL)) 109 pr_err("Couldn't register %s interrupt\n", "int7"); 110 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL)) 111 pr_err("Couldn't register %s interrupt\n", "vec255"); 112 } 113