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517 lines
11 KiB
C
517 lines
11 KiB
C
/* Simulator hardware option handling.
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Copyright (C) 1998-2021 Free Software Foundation, Inc.
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Contributed by Cygnus Support and Andrew Cagney.
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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 3 of the License, or
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(at your option) 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
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "sim-main.h"
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#include "sim-assert.h"
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#include "sim-options.h"
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#include "sim-hw.h"
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#include "hw-tree.h"
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#include "hw-device.h"
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#include "hw-main.h"
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#include "hw-base.h"
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <errno.h>
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struct sim_hw {
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struct hw *tree;
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int trace_p;
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int info_p;
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/* if called from a processor */
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sim_cpu *cpu;
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sim_cia cia;
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};
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struct hw *
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sim_hw_parse (struct sim_state *sd,
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const char *fmt,
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...)
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{
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struct hw *current;
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va_list ap;
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va_start (ap, fmt);
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current = hw_tree_vparse (STATE_HW (sd)->tree, fmt, ap);
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va_end (ap);
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return current;
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}
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struct printer {
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struct sim_state *file;
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void (*print) (struct sim_state *, const char *, va_list ap);
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};
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static void
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do_print (void *file, const char *fmt, ...)
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{
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struct printer *p = file;
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va_list ap;
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va_start (ap, fmt);
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p->print (p->file, fmt, ap);
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va_end (ap);
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}
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void
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sim_hw_print (struct sim_state *sd,
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void (*print) (struct sim_state *, const char *, va_list ap))
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{
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struct printer p;
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p.file = sd;
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p.print = print;
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hw_tree_print (STATE_HW (sd)->tree, do_print, &p);
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}
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/* command line options. */
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enum {
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OPTION_HW_INFO = OPTION_START,
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OPTION_HW_TRACE,
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OPTION_HW_DEVICE,
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OPTION_HW_LIST,
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OPTION_HW_FILE,
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};
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static DECLARE_OPTION_HANDLER (hw_option_handler);
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static const OPTION hw_options[] =
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{
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{ {"hw-info", no_argument, NULL, OPTION_HW_INFO },
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'\0', NULL, "List configurable hw regions",
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hw_option_handler, NULL },
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{ {"info-hw", no_argument, NULL, OPTION_HW_INFO },
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'\0', NULL, NULL,
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hw_option_handler, NULL },
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{ {"hw-trace", optional_argument, NULL, OPTION_HW_TRACE },
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'\0', "on|off", "Trace all hardware devices",
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hw_option_handler, NULL },
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{ {"trace-hw", optional_argument, NULL, OPTION_HW_TRACE },
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'\0', NULL, NULL,
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hw_option_handler, NULL },
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{ {"hw-device", required_argument, NULL, OPTION_HW_DEVICE },
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'\0', "DEVICE", "Add the specified device",
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hw_option_handler, NULL },
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{ {"hw-list", no_argument, NULL, OPTION_HW_LIST },
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'\0', NULL, "List the device tree",
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hw_option_handler, NULL },
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{ {"hw-file", required_argument, NULL, OPTION_HW_FILE },
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'\0', "FILE", "Add the devices listed in the file",
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hw_option_handler, NULL },
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{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
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};
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/* Copied from ../ppc/psim.c:psim_merge_device_file() */
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static SIM_RC
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merge_device_file (struct sim_state *sd,
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const char *file_name)
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{
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FILE *description;
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struct hw *current = STATE_HW (sd)->tree;
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char *device_path = NULL;
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size_t buf_size = 0;
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ssize_t device_path_len;
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/* try opening the file */
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description = fopen (file_name, "r");
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if (description == NULL)
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{
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perror (file_name);
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return SIM_RC_FAIL;
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}
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while ((device_path_len = getline (&device_path, &buf_size, description)) > 0)
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{
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char *device;
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char *next_line = NULL;
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if (device_path[device_path_len - 1] == '\n')
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device_path[--device_path_len] = '\0';
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/* skip comments ("#" or ";") and blank lines lines */
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for (device = device_path;
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*device != '\0' && isspace (*device);
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device++);
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if (device[0] == '#'
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|| device[0] == ';'
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|| device[0] == '\0')
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continue;
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/* merge any appended lines */
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while (device_path[device_path_len - 1] == '\\')
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{
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size_t next_buf_size = 0;
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ssize_t next_line_len;
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/* zap the `\' at the end of the line */
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device_path[--device_path_len] = '\0';
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/* get the next line */
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next_line_len = getline (&next_line, &next_buf_size, description);
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if (next_line_len <= 0)
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break;
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if (next_line[next_line_len - 1] == '\n')
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next_line[--next_line_len] = '\0';
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/* append the next line */
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if (buf_size - device_path_len <= next_line_len)
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{
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ptrdiff_t offset = device - device_path;
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buf_size += next_buf_size;
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device_path = xrealloc (device_path, buf_size);
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device = device_path + offset;
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}
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memcpy (device_path + device_path_len, next_line,
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next_line_len + 1);
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device_path_len += next_line_len;
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}
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free (next_line);
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/* parse this line */
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current = hw_tree_parse (current, "%s", device);
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}
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free (device_path);
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fclose (description);
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return SIM_RC_OK;
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}
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static SIM_RC
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hw_option_handler (struct sim_state *sd, sim_cpu *cpu, int opt,
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char *arg, int is_command)
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{
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switch (opt)
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{
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case OPTION_HW_INFO:
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{
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/* delay info until after the tree is finished */
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STATE_HW (sd)->info_p = 1;
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return SIM_RC_OK;
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break;
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}
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case OPTION_HW_TRACE:
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{
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if (arg == NULL)
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{
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STATE_HW (sd)->trace_p = 1;
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}
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else if (strcmp (arg, "yes") == 0
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|| strcmp (arg, "on") == 0)
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{
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STATE_HW (sd)->trace_p = 1;
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}
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else if (strcmp (arg, "no") == 0
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|| strcmp (arg, "off") == 0)
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{
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STATE_HW (sd)->trace_p = 0;
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}
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else
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{
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sim_io_eprintf (sd, "Option --hw-trace ignored\n");
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/* set tracing on all devices */
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return SIM_RC_FAIL;
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}
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/* FIXME: Not very nice - see also hw-base.c */
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if (STATE_HW (sd)->trace_p)
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hw_tree_parse (STATE_HW (sd)->tree, "/global-trace? true");
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return SIM_RC_OK;
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break;
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}
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case OPTION_HW_DEVICE:
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{
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hw_tree_parse (STATE_HW (sd)->tree, "%s", arg);
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return SIM_RC_OK;
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}
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case OPTION_HW_LIST:
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{
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sim_hw_print (sd, sim_io_vprintf);
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return SIM_RC_OK;
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}
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case OPTION_HW_FILE:
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{
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return merge_device_file (sd, arg);
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}
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default:
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sim_io_eprintf (sd, "Unknown hw option %d\n", opt);
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return SIM_RC_FAIL;
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}
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return SIM_RC_FAIL;
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}
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/* "hw" module install handler.
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This is called via sim_module_install to install the "hw" subsystem
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into the simulator. */
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static MODULE_INIT_FN sim_hw_init;
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static MODULE_UNINSTALL_FN sim_hw_uninstall;
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SIM_RC
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sim_hw_install (struct sim_state *sd)
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{
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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sim_add_option_table (sd, NULL, hw_options);
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sim_module_add_uninstall_fn (sd, sim_hw_uninstall);
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sim_module_add_init_fn (sd, sim_hw_init);
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STATE_HW (sd) = ZALLOC (struct sim_hw);
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STATE_HW (sd)->tree = hw_tree_create (sd, "core");
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return SIM_RC_OK;
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}
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static SIM_RC
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sim_hw_init (struct sim_state *sd)
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{
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/* FIXME: anything needed? */
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hw_tree_finish (STATE_HW (sd)->tree);
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if (STATE_HW (sd)->info_p)
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sim_hw_print (sd, sim_io_vprintf);
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return SIM_RC_OK;
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}
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/* Uninstall the "hw" subsystem from the simulator. */
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static void
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sim_hw_uninstall (struct sim_state *sd)
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{
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hw_tree_delete (STATE_HW (sd)->tree);
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free (STATE_HW (sd));
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STATE_HW (sd) = NULL;
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}
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/* Data transfers to/from the hardware device tree. There are several
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cases. */
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/* CPU: The simulation is running and the current CPU/CIA
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initiates a data transfer. */
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void
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sim_cpu_hw_io_read_buffer (sim_cpu *cpu,
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sim_cia cia,
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struct hw *hw,
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void *dest,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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STATE_HW (sd)->cpu = cpu;
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STATE_HW (sd)->cia = cia;
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if (hw_io_read_buffer (hw, dest, space, addr, nr_bytes) != nr_bytes)
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sim_engine_abort (sd, cpu, cia, "broken CPU read");
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}
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void
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sim_cpu_hw_io_write_buffer (sim_cpu *cpu,
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sim_cia cia,
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struct hw *hw,
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const void *source,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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STATE_HW (sd)->cpu = cpu;
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STATE_HW (sd)->cia = cia;
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if (hw_io_write_buffer (hw, source, space, addr, nr_bytes) != nr_bytes)
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sim_engine_abort (sd, cpu, cia, "broken CPU write");
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}
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/* SYSTEM: A data transfer is being initiated by the system. */
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unsigned
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sim_hw_io_read_buffer (struct sim_state *sd,
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struct hw *hw,
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void *dest,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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STATE_HW (sd)->cpu = NULL;
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return hw_io_read_buffer (hw, dest, space, addr, nr_bytes);
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}
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unsigned
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sim_hw_io_write_buffer (struct sim_state *sd,
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struct hw *hw,
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const void *source,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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STATE_HW (sd)->cpu = NULL;
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return hw_io_write_buffer (hw, source, space, addr, nr_bytes);
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}
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/* Abort the simulation specifying HW as the reason */
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void
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hw_vabort (struct hw *me,
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const char *fmt,
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va_list ap)
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{
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const char *name;
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char *msg;
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/* find an identity */
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if (me != NULL && hw_path (me) != NULL && hw_path (me) [0] != '\0')
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name = hw_path (me);
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else if (me != NULL && hw_name (me) != NULL && hw_name (me)[0] != '\0')
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name = hw_name (me);
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else if (me != NULL && hw_family (me) != NULL && hw_family (me)[0] != '\0')
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name = hw_family (me);
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else
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name = "device";
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/* construct an updated format string */
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msg = alloca (strlen (name) + strlen (": ") + strlen (fmt) + 1);
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strcpy (msg, name);
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strcat (msg, ": ");
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strcat (msg, fmt);
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/* report the problem */
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sim_engine_vabort (hw_system (me),
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STATE_HW (hw_system (me))->cpu,
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STATE_HW (hw_system (me))->cia,
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msg, ap);
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}
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void
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hw_abort (struct hw *me,
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const char *fmt,
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...)
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{
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va_list ap;
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/* report the problem */
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va_start (ap, fmt);
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hw_vabort (me, fmt, ap);
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va_end (ap);
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}
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void
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sim_hw_abort (struct sim_state *sd,
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struct hw *me,
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const char *fmt,
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...)
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{
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va_list ap;
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va_start (ap, fmt);
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if (me == NULL)
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sim_engine_vabort (sd, NULL, NULL_CIA, fmt, ap);
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else
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hw_vabort (me, fmt, ap);
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va_end (ap);
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}
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/* MISC routines to tie HW into the rest of the system */
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void
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hw_halt (struct hw *me,
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int reason,
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int status)
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{
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struct sim_state *sd = hw_system (me);
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struct sim_hw *sim = STATE_HW (sd);
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sim_engine_halt (sd, sim->cpu, NULL, sim->cia, reason, status);
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}
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struct _sim_cpu *
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hw_system_cpu (struct hw *me)
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{
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return STATE_HW (hw_system (me))->cpu;
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}
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void
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hw_trace (struct hw *me,
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const char *fmt,
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...)
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{
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if (hw_trace_p (me)) /* to be sure, to be sure */
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{
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va_list ap;
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va_start (ap, fmt);
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sim_io_eprintf (hw_system (me), "%s: ", hw_path (me));
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sim_io_evprintf (hw_system (me), fmt, ap);
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sim_io_eprintf (hw_system (me), "\n");
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va_end (ap);
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}
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}
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/* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin() */
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int
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do_hw_poll_read (struct hw *me,
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do_hw_poll_read_method *read,
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int sim_io_fd,
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void *buf,
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unsigned sizeof_buf)
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{
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int status = read (hw_system (me), sim_io_fd, buf, sizeof_buf);
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if (status > 0)
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return status;
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else if (status == 0 && sizeof_buf == 0)
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return 0;
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else if (status == 0)
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return HW_IO_EOF;
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else /* status < 0 */
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{
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#ifdef EAGAIN
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if (STATE_CALLBACK (hw_system (me))->last_errno == EAGAIN)
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return HW_IO_NOT_READY;
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else
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return HW_IO_EOF;
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#else
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return HW_IO_EOF;
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#endif
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}
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}
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