162306a36Sopenharmony_ci/* 262306a36Sopenharmony_ci * This file is subject to the terms and conditions of the GNU General Public 362306a36Sopenharmony_ci * License. See the file "COPYING" in the main directory of this archive 462306a36Sopenharmony_ci * for more details. 562306a36Sopenharmony_ci * 662306a36Sopenharmony_ci * Copyright (C) 1992 Linus Torvalds 762306a36Sopenharmony_ci * Copyright (C) 1994 - 2000 Ralf Baechle 862306a36Sopenharmony_ci * Copyright (C) 2006 Thomas Bogendoerfer 962306a36Sopenharmony_ci */ 1062306a36Sopenharmony_ci#include <linux/delay.h> 1162306a36Sopenharmony_ci#include <linux/init.h> 1262306a36Sopenharmony_ci#include <linux/interrupt.h> 1362306a36Sopenharmony_ci#include <linux/irq.h> 1462306a36Sopenharmony_ci#include <linux/kernel.h> 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci#include <asm/i8259.h> 1762306a36Sopenharmony_ci#include <asm/io.h> 1862306a36Sopenharmony_ci#include <asm/sni.h> 1962306a36Sopenharmony_ci#include <asm/irq.h> 2062306a36Sopenharmony_ci#include <asm/irq_cpu.h> 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_civoid (*sni_hwint)(void); 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ciasmlinkage void plat_irq_dispatch(void) 2562306a36Sopenharmony_ci{ 2662306a36Sopenharmony_ci sni_hwint(); 2762306a36Sopenharmony_ci} 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci/* ISA irq handler */ 3062306a36Sopenharmony_ciirqreturn_t sni_isa_irq_handler(int dummy, void *p) 3162306a36Sopenharmony_ci{ 3262306a36Sopenharmony_ci int irq; 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci irq = i8259_irq(); 3562306a36Sopenharmony_ci if (unlikely(irq < 0)) 3662306a36Sopenharmony_ci return IRQ_NONE; 3762306a36Sopenharmony_ci 3862306a36Sopenharmony_ci generic_handle_irq(irq); 3962306a36Sopenharmony_ci return IRQ_HANDLED; 4062306a36Sopenharmony_ci} 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci/* 4362306a36Sopenharmony_ci * On systems with i8259-style interrupt controllers we assume for 4462306a36Sopenharmony_ci * driver compatibility reasons interrupts 0 - 15 to be the i8295 4562306a36Sopenharmony_ci * interrupts even if the hardware uses a different interrupt numbering. 4662306a36Sopenharmony_ci */ 4762306a36Sopenharmony_civoid __init arch_init_irq(void) 4862306a36Sopenharmony_ci{ 4962306a36Sopenharmony_ci init_i8259_irqs(); /* Integrated i8259 */ 5062306a36Sopenharmony_ci switch (sni_brd_type) { 5162306a36Sopenharmony_ci case SNI_BRD_10: 5262306a36Sopenharmony_ci case SNI_BRD_10NEW: 5362306a36Sopenharmony_ci case SNI_BRD_TOWER_OASIC: 5462306a36Sopenharmony_ci case SNI_BRD_MINITOWER: 5562306a36Sopenharmony_ci sni_a20r_irq_init(); 5662306a36Sopenharmony_ci break; 5762306a36Sopenharmony_ci 5862306a36Sopenharmony_ci case SNI_BRD_PCI_TOWER: 5962306a36Sopenharmony_ci sni_pcit_irq_init(); 6062306a36Sopenharmony_ci break; 6162306a36Sopenharmony_ci 6262306a36Sopenharmony_ci case SNI_BRD_PCI_TOWER_CPLUS: 6362306a36Sopenharmony_ci sni_pcit_cplus_irq_init(); 6462306a36Sopenharmony_ci break; 6562306a36Sopenharmony_ci 6662306a36Sopenharmony_ci case SNI_BRD_RM200: 6762306a36Sopenharmony_ci sni_rm200_irq_init(); 6862306a36Sopenharmony_ci break; 6962306a36Sopenharmony_ci 7062306a36Sopenharmony_ci case SNI_BRD_PCI_MTOWER: 7162306a36Sopenharmony_ci case SNI_BRD_PCI_DESKTOP: 7262306a36Sopenharmony_ci case SNI_BRD_PCI_MTOWER_CPLUS: 7362306a36Sopenharmony_ci sni_pcimt_irq_init(); 7462306a36Sopenharmony_ci break; 7562306a36Sopenharmony_ci } 7662306a36Sopenharmony_ci} 77