// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2000-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2007 Freescale Semiconductor Inc * TsiChung Liew (Tsi-Chung.Liew@freescale.com) */ #include #include #include #include #include #include #define NR_IRQS (CFG_SYS_NUM_IRQS) /* * Interrupt vector functions. */ struct interrupt_action { interrupt_handler_t *handler; void *arg; }; static struct interrupt_action irq_vecs[NR_IRQS]; static __inline__ unsigned short get_sr (void) { unsigned short sr; asm volatile ("move.w %%sr,%0":"=r" (sr):); return sr; } static __inline__ void set_sr (unsigned short sr) { asm volatile ("move.w %0,%%sr"::"r" (sr)); } /************************************************************************/ /* * Install and free an interrupt handler */ void irq_install_handler(int vec, interrupt_handler_t * handler, void *arg) { if ((vec < 0) || (vec >= NR_IRQS)) { printf ("irq_install_handler: wrong interrupt vector %d\n", vec); return; } irq_vecs[vec].handler = handler; irq_vecs[vec].arg = arg; } void irq_free_handler(int vec) { if ((vec < 0) || (vec >= NR_IRQS)) { return; } irq_vecs[vec].handler = NULL; irq_vecs[vec].arg = NULL; } void enable_interrupts(void) { unsigned short sr; sr = get_sr (); set_sr (sr & ~0x0700); } int disable_interrupts(void) { unsigned short sr; sr = get_sr (); set_sr (sr | 0x0700); return ((sr & 0x0700) == 0); /* return true, if interrupts were enabled before */ } void int_handler (struct pt_regs *fp) { int vec; vec = (fp->vector >> 2) & 0xff; if (vec > 0x40) vec -= 0x40; if (irq_vecs[vec].handler != NULL) { irq_vecs[vec].handler (irq_vecs[vec].arg); } else { printf ("\nBogus External Interrupt Vector %d\n", vec); } }