^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * linux/arch/m68k/kernel/ints.c -- Linux/m68k general 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/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.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/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/irq_regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #ifdef CONFIG_Q40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/q40ints.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) extern u32 auto_irqhandler_fixup[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) extern u16 user_irqvec_fixup[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int m68k_first_user_vec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static struct irq_chip auto_irq_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .name = "auto",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .irq_startup = m68k_irq_startup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .irq_shutdown = m68k_irq_shutdown,
^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) static struct irq_chip user_irq_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .name = "user",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .irq_startup = m68k_irq_startup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) .irq_shutdown = m68k_irq_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) };
^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 init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * Parameters: None
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * Returns: Nothing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * This function should be called during kernel startup to initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * the IRQ handling routines.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) void __init init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) mach_init_IRQ();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * m68k_setup_auto_interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * @handler: called from auto vector interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * setup the handler to be called from auto vector interrupts instead of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * standard do_IRQ(), it will be called with irq numbers in the range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * from IRQ_AUTO_1 - IRQ_AUTO_7.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) *auto_irqhandler_fixup = (u32)handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) flush_icache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * m68k_setup_user_interrupt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * @vec: first user vector interrupt to handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @cnt: number of active user vector interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * setup user vector interrupts, this includes activating the specified range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * of interrupts, only then these interrupts can be requested (note: this is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * different from auto vector interrupts).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) BUG_ON(IRQ_USER + cnt > NR_IRQS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) m68k_first_user_vec = vec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) for (i = 0; i < cnt; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) *user_irqvec_fixup = vec - IRQ_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) flush_icache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * m68k_setup_irq_controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * @chip: irq chip which controls specified irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * @handle: flow handler which handles specified irq
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * @irq: first irq to be managed by the controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * @cnt: number of irqs to be managed by the controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * Change the controller for the specified range of irq, which will be used to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * manage these irq. auto/user irq already have a default controller, which can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * be changed as well, but the controller probably should use m68k_irq_startup/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * m68k_irq_shutdown.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) void m68k_setup_irq_controller(struct irq_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) irq_flow_handler_t handle, unsigned int irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) unsigned int cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) for (i = 0; i < cnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) irq_set_chip(irq + i, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) irq_set_handler(irq + i, handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) unsigned int m68k_irq_startup_irq(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (irq <= IRQ_AUTO_7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) vectors[VEC_SPUR + irq] = auto_inthandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned int m68k_irq_startup(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return m68k_irq_startup_irq(data->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) void m68k_irq_shutdown(struct irq_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) unsigned int irq = data->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (irq <= IRQ_AUTO_7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) vectors[VEC_SPUR + irq] = bad_inthandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) unsigned int irq_canonicalize(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #ifdef CONFIG_Q40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (MACH_IS_Q40 && irq == 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) irq = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) EXPORT_SYMBOL(irq_canonicalize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) asmlinkage void handle_badint(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) atomic_inc(&irq_err_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) pr_warn("unexpected interrupt from %u\n", regs->vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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