| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 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 | static 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 | struct irqaction sni_isa_irq = { |
| 43 | .handler = sni_isa_irq_handler, |
| 44 | .name = "ISA", |
| 45 | .flags = IRQF_SHARED |
| 46 | }; |
| 47 | |
| 48 | /* |
| 49 | * On systems with i8259-style interrupt controllers we assume for |
| 50 | * driver compatibility reasons interrupts 0 - 15 to be the i8295 |
| 51 | * interrupts even if the hardware uses a different interrupt numbering. |
| 52 | */ |
| 53 | void __init arch_init_irq(void) |
| 54 | { |
| 55 | init_i8259_irqs(); /* Integrated i8259 */ |
| 56 | switch (sni_brd_type) { |
| 57 | case SNI_BRD_10: |
| 58 | case SNI_BRD_10NEW: |
| 59 | case SNI_BRD_TOWER_OASIC: |
| 60 | case SNI_BRD_MINITOWER: |
| 61 | sni_a20r_irq_init(); |
| 62 | break; |
| 63 | |
| 64 | case SNI_BRD_PCI_TOWER: |
| 65 | sni_pcit_irq_init(); |
| 66 | break; |
| 67 | |
| 68 | case SNI_BRD_PCI_TOWER_CPLUS: |
| 69 | sni_pcit_cplus_irq_init(); |
| 70 | break; |
| 71 | |
| 72 | case SNI_BRD_RM200: |
| 73 | sni_rm200_irq_init(); |
| 74 | break; |
| 75 | |
| 76 | case SNI_BRD_PCI_MTOWER: |
| 77 | case SNI_BRD_PCI_DESKTOP: |
| 78 | case SNI_BRD_PCI_MTOWER_CPLUS: |
| 79 | sni_pcimt_irq_init(); |
| 80 | break; |
| 81 | } |
| 82 | } |