109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
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/* m32r device support
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Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "sim-main.h"
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#ifdef HAVE_DV_SOCKSER
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#include "dv-sockser.h"
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#endif
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/* Handling the MSPR register is done by creating a device in the core
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mapping that winds up here. */
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device m32r_devices;
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int
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device_io_read_buffer (device *me, void *source, int space,
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address_word addr, unsigned nr_bytes,
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SIM_CPU *cpu, sim_cia cia)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
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return nr_bytes;
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#ifdef HAVE_DV_SOCKSER
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if (addr == UART_INCHAR_ADDR)
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{
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int c = dv_sockser_read (sd);
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if (c == -1)
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return 0;
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*(char *) source = c;
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return 1;
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}
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if (addr == UART_STATUS_ADDR)
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{
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int status = dv_sockser_status (sd);
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unsigned char *p = source;
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p[0] = 0;
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p[1] = (((status & DV_SOCKSER_INPUT_EMPTY)
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#ifdef UART_INPUT_READY0
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? UART_INPUT_READY : 0)
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#else
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? 0 : UART_INPUT_READY)
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#endif
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+ ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0));
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return 2;
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}
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#endif
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return nr_bytes;
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}
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int
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device_io_write_buffer (device *me, const void *source, int space,
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address_word addr, unsigned nr_bytes,
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SIM_CPU *cpu, sim_cia cia)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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#if WITH_SCACHE
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/* MSPR support is deprecated but is kept in for upward compatibility
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with existing overlay support. */
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if (addr == MSPR_ADDR)
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{
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if ((*(const char *) source & MSPR_PURGE) != 0)
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scache_flush (sd);
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return nr_bytes;
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}
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if (addr == MCCR_ADDR)
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{
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if ((*(const char *) source & MCCR_CP) != 0)
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scache_flush (sd);
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return nr_bytes;
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}
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#endif
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if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
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return nr_bytes;
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#if HAVE_DV_SOCKSER
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if (addr == UART_OUTCHAR_ADDR)
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{
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int rc = dv_sockser_write (sd, *(char *) source);
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return rc == 1;
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}
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#endif
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return nr_bytes;
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}
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void device_error () {}
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