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101 lines
2.1 KiB
101 lines
2.1 KiB
/* |
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* linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/kernel_stat.h> |
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#include <linux/interrupt.h> |
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#include <asm/segment.h> |
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#include <asm/intersil.h> |
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#include <asm/oplib.h> |
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#include <asm/sun3ints.h> |
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#include <asm/irq_regs.h> |
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#include <linux/seq_file.h> |
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extern void sun3_leds (unsigned char); |
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void sun3_disable_interrupts(void) |
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{ |
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sun3_disable_irq(0); |
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} |
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void sun3_enable_interrupts(void) |
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{ |
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sun3_enable_irq(0); |
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} |
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static int led_pattern[8] = { |
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~(0x80), ~(0x01), |
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~(0x40), ~(0x02), |
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~(0x20), ~(0x04), |
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~(0x10), ~(0x08) |
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}; |
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volatile unsigned char* sun3_intreg; |
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void sun3_enable_irq(unsigned int irq) |
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{ |
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*sun3_intreg |= (1 << irq); |
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} |
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void sun3_disable_irq(unsigned int irq) |
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{ |
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*sun3_intreg &= ~(1 << irq); |
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} |
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static irqreturn_t sun3_int7(int irq, void *dev_id) |
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{ |
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unsigned int cnt; |
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cnt = kstat_irqs_cpu(irq, 0); |
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if (!(cnt % 2000)) |
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sun3_leds(led_pattern[cnt % 16000 / 2000]); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t sun3_int5(int irq, void *dev_id) |
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{ |
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unsigned long flags; |
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unsigned int cnt; |
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local_irq_save(flags); |
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#ifdef CONFIG_SUN3 |
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intersil_clear(); |
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#endif |
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sun3_disable_irq(5); |
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sun3_enable_irq(5); |
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#ifdef CONFIG_SUN3 |
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intersil_clear(); |
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#endif |
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legacy_timer_tick(1); |
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cnt = kstat_irqs_cpu(irq, 0); |
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if (!(cnt % 20)) |
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sun3_leds(led_pattern[cnt % 160 / 20]); |
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local_irq_restore(flags); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t sun3_vec255(int irq, void *dev_id) |
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{ |
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return IRQ_HANDLED; |
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} |
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void __init sun3_init_IRQ(void) |
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{ |
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*sun3_intreg = 1; |
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m68k_setup_user_interrupt(VEC_USER, 128); |
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if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL)) |
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pr_err("Couldn't register %s interrupt\n", "int5"); |
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if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL)) |
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pr_err("Couldn't register %s interrupt\n", "int7"); |
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if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL)) |
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pr_err("Couldn't register %s interrupt\n", "vec255"); |
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}
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