// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology * Author: Fuxin Zhang, zhangfx@lemote.com */ #include <linux/delay.h> #include <linux/interrupt.h> #include <loongson.h> /* * the first level int-handler will jump here if it is a bonito irq */ void bonito_irqdispatch(void) { u32 int_status; int i; /* workaround the IO dma problem: let cpu looping to allow DMA finish */ int_status = LOONGSON_INTISR; while (int_status & (1 << 10)) { udelay(1); int_status = LOONGSON_INTISR; } /* Get pending sources, masked by current enables */ int_status = LOONGSON_INTISR & LOONGSON_INTEN; if (int_status) { i = __ffs(int_status); do_IRQ(LOONGSON_IRQ_BASE + i); } } asmlinkage void plat_irq_dispatch(void) { unsigned int pending; pending = read_c0_cause() & read_c0_status() & ST0_IM; /* machine-specific plat_irq_dispatch */ mach_irq_dispatch(pending); } void __init arch_init_irq(void) { /* * Clear all of the interrupts while we change the able around a bit. * int-handler is not on bootstrap */ clear_c0_status(ST0_IM | ST0_BEV); /* no steer */ LOONGSON_INTSTEER = 0; /* * Mask out all interrupt by writing "1" to all bit position in * the interrupt reset reg. */ LOONGSON_INTENCLR = ~0; /* machine specific irq init */ mach_init_irq(); }