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-rw-r--r--sim/i960/devices.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/sim/i960/devices.c b/sim/i960/devices.c
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+++ b/sim/i960/devices.c
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+/* i960 device support
+ Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+ Contributed by Cygnus Solutions.
+
+This file is part of GDB, the GNU debugger.
+
+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, 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.,
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "sim-main.h"
+
+#ifdef HAVE_DV_SOCKSER
+#include "dv-sockser.h"
+#endif
+
+/* Handling the MSPR register is done by creating a device in the core
+ mapping that winds up here. */
+
+device i960_devices;
+
+int
+device_io_read_buffer (device *me, void *source, int space,
+ address_word addr, unsigned nr_bytes,
+ SIM_CPU *cpu, sim_cia cia)
+{
+ SIM_DESC sd = CPU_STATE (cpu);
+
+ if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
+ return nr_bytes;
+
+#ifdef HAVE_DV_SOCKSER
+ if (addr == UART_INCHAR_ADDR)
+ {
+ int c = dv_sockser_read (sd);
+ if (c == -1)
+ return 0;
+ *(char *) source = c;
+ return 1;
+ }
+ if (addr == UART_STATUS_ADDR)
+ {
+ int status = dv_sockser_status (sd);
+ unsigned char *p = source;
+ p[0] = 0;
+ p[1] = (((status & DV_SOCKSER_INPUT_EMPTY)
+#ifdef UART_INPUT_READY0
+ ? UART_INPUT_READY : 0)
+#else
+ ? 0 : UART_INPUT_READY)
+#endif
+ + ((status & DV_SOCKSER_OUTPUT_EMPTY) ? UART_OUTPUT_READY : 0));
+ return 2;
+ }
+#endif
+
+ return nr_bytes;
+}
+
+int
+device_io_write_buffer (device *me, const void *source, int space,
+ address_word addr, unsigned nr_bytes,
+ SIM_CPU *cpu, sim_cia cia)
+{
+ SIM_DESC sd = CPU_STATE (cpu);
+
+#if WITH_SCACHE
+ /* MSPR support is deprecated but is kept in for upward compatibility
+ with existing overlay support. */
+ if (addr == MSPR_ADDR)
+ {
+ if ((*(const char *) source & MSPR_PURGE) != 0)
+ scache_flush (sd);
+ return nr_bytes;
+ }
+ if (addr == MCCR_ADDR)
+ {
+ if ((*(const char *) source & MCCR_CP) != 0)
+ scache_flush (sd);
+ return nr_bytes;
+ }
+#endif
+
+ if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
+ return nr_bytes;
+
+#if HAVE_DV_SOCKSER
+ if (addr == UART_OUTCHAR_ADDR)
+ {
+ int rc = dv_sockser_write (sd, *(char *) source);
+ return rc == 1;
+ }
+#endif
+
+ return nr_bytes;
+}
+
+void device_error () {}