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+/*
+ Nios-sim - one simple NIOSII simulator only for personal interest and fun.
+ Copyright (C) 2010 chysun2000@gmail.com
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+
+#ifndef __IO_DEVICE_H__
+#define __IO_DEVICE_H__
+#include <stdio.h>
+
+#define ADDR_IS_NOT_DEV (0)
+#define ADDR_IS_DEV (1)
+
+#define DEV_HAS_IRQ (1)
+#define DEV_NO_IRQ (0)
+
+struct io_device;
+struct io_device {
+ void * priv_data;
+ char * name;
+ uint32_t irq_enable_mask;
+ void (*init)(struct io_device * self);
+ int32_t (*is_belong)(uint32_t address);
+ uint32_t (*read_data)(struct io_device * self, uint32_t addr, uint32_t data_len);
+ void (*write_data)(struct io_device * self, uint32_t addr, uint32_t data, uint32_t data_len);
+ int32_t (*has_irq)(struct io_device * self);
+ void (*simulate)(struct io_device * self);
+
+};
+
+struct io_reg {
+ uint32_t addr;
+ uint32_t value;
+ uint32_t valid_mask;
+ uint32_t only_read_mask;
+};
+
+extern void init_devices(void);
+extern struct io_device * get_device(uint32_t address);
+
+extern uint32_t io_write_data(uint32_t old_data, uint32_t new_data, uint32_t data_len);
+extern uint32_t io_read_data(uint32_t old_data, uint32_t data_len);
+extern uint32_t io_write_data_mask(uint32_t old_data, uint32_t new_data, uint32_t data_len,
+ uint32_t valid_mask, uint32_t only_read_mask);
+extern void hw_simulating(void);
+extern uint32_t get_io_irq_status(void);
+
+extern uint32_t check_reg_bit(uint32_t value, uint32_t mask);
+#endif
+
+