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 <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 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, struct pt_regs *fp) 52 { 53 *sun3_intreg |= (1 << irq); 54 if (!(kstat_cpu(0).irqs[irq] % 2000)) 55 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]); 56 return IRQ_HANDLED; 57 } 58 59 static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp) 60 { 61 #ifdef CONFIG_SUN3 62 intersil_clear(); 63 #endif 64 *sun3_intreg |= (1 << irq); 65 #ifdef CONFIG_SUN3 66 intersil_clear(); 67 #endif 68 do_timer(fp); 69 #ifndef CONFIG_SMP 70 update_process_times(user_mode(fp)); 71 #endif 72 if (!(kstat_cpu(0).irqs[irq] % 20)) 73 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]); 74 return IRQ_HANDLED; 75 } 76 77 static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp) 78 { 79 // intersil_clear(); 80 return IRQ_HANDLED; 81 } 82 83 static void sun3_inthandle(unsigned int irq, struct pt_regs *fp) 84 { 85 *sun3_intreg &= ~(1 << irq); 86 87 m68k_handle_int(irq, fp); 88 } 89 90 static struct irq_controller sun3_irq_controller = { 91 .name = "sun3", 92 .lock = SPIN_LOCK_UNLOCKED, 93 .startup = m68k_irq_startup, 94 .shutdown = m68k_irq_shutdown, 95 .enable = sun3_enable_irq, 96 .disable = sun3_disable_irq, 97 }; 98 99 void sun3_init_IRQ(void) 100 { 101 *sun3_intreg = 1; 102 103 m68k_setup_auto_interrupt(sun3_inthandle); 104 m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7); 105 m68k_setup_user_interrupt(VEC_USER, 192, NULL); 106 107 request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL); 108 request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL); 109 request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL); 110 } 111