1 /* 2 * IRQ splitter device. 3 * 4 * Copyright (c) 2018 Linaro Limited. 5 * Written by Peter Maydell 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 /* This is a simple device which has one GPIO input line and multiple 27 * GPIO output lines. Any change on the input line is forwarded to all 28 * of the outputs. 29 * 30 * QEMU interface: 31 * + one unnamed GPIO input: the input line 32 * + N unnamed GPIO outputs: the output lines 33 * + QOM property "num-lines": sets the number of output lines 34 */ 35 #ifndef HW_SPLIT_IRQ_H 36 #define HW_SPLIT_IRQ_H 37 38 #include "hw/irq.h" 39 #include "hw/sysbus.h" 40 #include "qom/object.h" 41 42 #define TYPE_SPLIT_IRQ "split-irq" 43 44 #define MAX_SPLIT_LINES 16 45 46 typedef struct SplitIRQ SplitIRQ; 47 48 #define SPLIT_IRQ(obj) OBJECT_CHECK(SplitIRQ, (obj), TYPE_SPLIT_IRQ) 49 50 struct SplitIRQ { 51 DeviceState parent_obj; 52 53 qemu_irq out_irq[MAX_SPLIT_LINES]; 54 uint16_t num_lines; 55 }; 56 57 #endif 58