1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public 3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive 4*4882a593Smuzhiyun * for more details. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Copyright (C) 1992 Linus Torvalds 7*4882a593Smuzhiyun * Copyright (C) 1994 - 2000 Ralf Baechle 8*4882a593Smuzhiyun * Copyright (C) 2006 Thomas Bogendoerfer 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun #include <linux/delay.h> 11*4882a593Smuzhiyun #include <linux/init.h> 12*4882a593Smuzhiyun #include <linux/interrupt.h> 13*4882a593Smuzhiyun #include <linux/irq.h> 14*4882a593Smuzhiyun #include <linux/kernel.h> 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #include <asm/i8259.h> 17*4882a593Smuzhiyun #include <asm/io.h> 18*4882a593Smuzhiyun #include <asm/sni.h> 19*4882a593Smuzhiyun #include <asm/irq.h> 20*4882a593Smuzhiyun #include <asm/irq_cpu.h> 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun void (*sni_hwint)(void); 23*4882a593Smuzhiyun plat_irq_dispatch(void)24*4882a593Smuzhiyunasmlinkage void plat_irq_dispatch(void) 25*4882a593Smuzhiyun { 26*4882a593Smuzhiyun sni_hwint(); 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* ISA irq handler */ sni_isa_irq_handler(int dummy,void * p)30*4882a593Smuzhiyunirqreturn_t sni_isa_irq_handler(int dummy, void *p) 31*4882a593Smuzhiyun { 32*4882a593Smuzhiyun int irq; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun irq = i8259_irq(); 35*4882a593Smuzhiyun if (unlikely(irq < 0)) 36*4882a593Smuzhiyun return IRQ_NONE; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun generic_handle_irq(irq); 39*4882a593Smuzhiyun return IRQ_HANDLED; 40*4882a593Smuzhiyun } 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun /* 43*4882a593Smuzhiyun * On systems with i8259-style interrupt controllers we assume for 44*4882a593Smuzhiyun * driver compatibility reasons interrupts 0 - 15 to be the i8295 45*4882a593Smuzhiyun * interrupts even if the hardware uses a different interrupt numbering. 46*4882a593Smuzhiyun */ arch_init_irq(void)47*4882a593Smuzhiyunvoid __init arch_init_irq(void) 48*4882a593Smuzhiyun { 49*4882a593Smuzhiyun init_i8259_irqs(); /* Integrated i8259 */ 50*4882a593Smuzhiyun switch (sni_brd_type) { 51*4882a593Smuzhiyun case SNI_BRD_10: 52*4882a593Smuzhiyun case SNI_BRD_10NEW: 53*4882a593Smuzhiyun case SNI_BRD_TOWER_OASIC: 54*4882a593Smuzhiyun case SNI_BRD_MINITOWER: 55*4882a593Smuzhiyun sni_a20r_irq_init(); 56*4882a593Smuzhiyun break; 57*4882a593Smuzhiyun 58*4882a593Smuzhiyun case SNI_BRD_PCI_TOWER: 59*4882a593Smuzhiyun sni_pcit_irq_init(); 60*4882a593Smuzhiyun break; 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun case SNI_BRD_PCI_TOWER_CPLUS: 63*4882a593Smuzhiyun sni_pcit_cplus_irq_init(); 64*4882a593Smuzhiyun break; 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun case SNI_BRD_RM200: 67*4882a593Smuzhiyun sni_rm200_irq_init(); 68*4882a593Smuzhiyun break; 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun case SNI_BRD_PCI_MTOWER: 71*4882a593Smuzhiyun case SNI_BRD_PCI_DESKTOP: 72*4882a593Smuzhiyun case SNI_BRD_PCI_MTOWER_CPLUS: 73*4882a593Smuzhiyun sni_pcimt_irq_init(); 74*4882a593Smuzhiyun break; 75*4882a593Smuzhiyun } 76*4882a593Smuzhiyun } 77