Subversion Repositories darkriscv

/*
 * Copyright (c) 2018, Marcelo Samsoniuk
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * 
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */
 
#ifndef __IO__
#define __IO__
 
extern volatile int threads; // number of threads in the core
extern volatile int utimers; // microsecond timer
 
struct DARKIO {
 
    unsigned char board_id; // 00
    unsigned char board_cm; // 01
    unsigned char board_ck; // 02
    unsigned char irq;      // 03
 
    struct DARKUART {
 
        unsigned char  stat; // 04
        unsigned char  fifo; // 05
        unsigned short baud; // 06/07
 
    } uart;
 
    unsigned short led;     // 08/09
    unsigned short gpio;    // 0a/0b
 
    unsigned int timer;     // 0c
};
 
extern volatile struct DARKIO io;
 
extern char *board_name(int);
 
#ifdef __RISCV__
#define kmem 0
#else
extern unsigned char kmem[8192];
#endif
 
#define IRQ_TIMR 0x80
#define IRQ_UART 0x02
 
#endif