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