^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * License. See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/segment.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/intersil.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/sun3ints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/irq_regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) extern void sun3_leds (unsigned char);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) void sun3_disable_interrupts(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) sun3_disable_irq(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) void sun3_enable_interrupts(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) sun3_enable_irq(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int led_pattern[8] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) ~(0x80), ~(0x01),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) ~(0x40), ~(0x02),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) ~(0x20), ~(0x04),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ~(0x10), ~(0x08)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) volatile unsigned char* sun3_intreg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) void sun3_enable_irq(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) *sun3_intreg |= (1 << irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) void sun3_disable_irq(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) *sun3_intreg &= ~(1 << irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static irqreturn_t sun3_int7(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) unsigned int cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) cnt = kstat_irqs_cpu(irq, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!(cnt % 2000))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) sun3_leds(led_pattern[cnt % 16000 / 2000]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static irqreturn_t sun3_int5(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) unsigned int cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #ifdef CONFIG_SUN3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) intersil_clear();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) sun3_disable_irq(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) sun3_enable_irq(5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #ifdef CONFIG_SUN3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) intersil_clear();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) xtime_update(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) update_process_times(user_mode(get_irq_regs()));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) cnt = kstat_irqs_cpu(irq, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (!(cnt % 20))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) sun3_leds(led_pattern[cnt % 160 / 20]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static irqreturn_t sun3_vec255(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) void __init sun3_init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) *sun3_intreg = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) m68k_setup_user_interrupt(VEC_USER, 128);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) pr_err("Couldn't register %s interrupt\n", "int5");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) pr_err("Couldn't register %s interrupt\n", "int7");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pr_err("Couldn't register %s interrupt\n", "vec255");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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