FreeCalypso > hg > fc-sim-tools

annotate calypso/tpinterf.c @ 6:0a21a7ffe144

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calypso: caltest front end put together
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Mar 2021 05:26:58 +0000
parents deeeef558279
children b25d4dfe5798
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * This code is based on loadtools/tpinterf.c from FC host tools,
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Mychaela Falconia <falcon@freecalypso.org>
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3 * modified for our different application of interfacing between
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Mychaela Falconia <falcon@freecalypso.org>
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4 * simagent below and fc-simtool above.
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Mychaela Falconia <falcon@freecalypso.org>
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5 */
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6
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Mychaela Falconia <falcon@freecalypso.org>
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7 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
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8 #include <sys/time.h>
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Mychaela Falconia <falcon@freecalypso.org>
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9 #include <sys/errno.h>
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Mychaela Falconia <falcon@freecalypso.org>
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10 #include <stdio.h>
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11 #include <string.h>
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12 #include <strings.h>
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13 #include <stdlib.h>
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14 #include <unistd.h>
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15
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16 extern int errno;
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17
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18 extern int target_fd;
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Mychaela Falconia <falcon@freecalypso.org>
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19
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Mychaela Falconia <falcon@freecalypso.org>
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20 /* definition matches target-utils/libcommon/cmdentry.c */
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Mychaela Falconia <falcon@freecalypso.org>
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21 #define MAXCMD 527
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22
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23 /*
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24 * static buffer between tpinterf_make_cmd and tpinterf_send_cmd
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25 *
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26 * We store the command with an ending \r\n so we can use it for
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Mychaela Falconia <falcon@freecalypso.org>
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27 * matching the received echo as well, hence the sizing of the
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Mychaela Falconia <falcon@freecalypso.org>
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28 * buffer.
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Mychaela Falconia <falcon@freecalypso.org>
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29 */
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Mychaela Falconia <falcon@freecalypso.org>
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30 static char cmdbuf[MAXCMD+2];
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31 static int cmdlen;
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32
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33 static int
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34 arg_chars_valid(arg)
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35 char *arg;
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36 {
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37 char *cp;
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38
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39 for (cp = arg; *cp; cp++)
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40 if (*cp < ' ' || *cp > '~')
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41 return(0);
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42 return(1);
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43 }
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44
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45 /*
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46 * This function takes a command for the target in argv form and
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47 * converts it to a space-separated continuous string which can be
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48 * passed as tty "keyboard" input to the target, enforcing length
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49 * and character validity limits in the process. The output is
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Mychaela Falconia <falcon@freecalypso.org>
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50 * stored in an internal static buffer for subsequent
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Mychaela Falconia <falcon@freecalypso.org>
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51 * tpinterf_send_cmd().
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52 *
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53 * Return value: 0 if everything OK, or -1 if some constraint is
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54 * violated.
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55 */
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Mychaela Falconia <falcon@freecalypso.org>
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56 tpinterf_make_cmd(argv)
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57 char **argv;
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58 {
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59 int arglen;
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60 char **ap, *dp;
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61
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62 dp = cmdbuf;
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63 cmdlen = 0;
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64 for (ap = argv; *ap; ap++) {
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65 arglen = strlen(*ap);
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66 if (ap != argv)
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67 arglen++; /* separating space */
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68 if (arglen > MAXCMD - cmdlen)
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69 return(-1);
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70 if (!arg_chars_valid(*ap))
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71 return(-1);
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72 if (ap != argv)
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73 *dp++ = ' ';
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74 strcpy(dp, *ap);
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75 dp += strlen(*ap);
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76 cmdlen += arglen;
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77 }
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78 *dp++ = '\r';
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79 *dp = '\n';
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80 return(0);
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81 }
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82
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83 /*
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84 * This function sends the previously-constructed command to the target,
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85 * and collects the expected echo.
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86 *
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87 * Return value: 0 if successful, -1 on errors (timeout or wrong response)
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88 */
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89 tpinterf_send_cmd()
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90 {
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91 char echobuf[MAXCMD+2];
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92 fd_set fds;
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93 struct timeval tv;
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94 int rcvd, cc;
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95
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96 write(target_fd, cmdbuf, cmdlen + 1);
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97 for (rcvd = 0; rcvd < cmdlen + 2; ) {
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98 FD_ZERO(&fds);
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99 FD_SET(target_fd, &fds);
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100 tv.tv_sec = 1;
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101 tv.tv_usec = 0;
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102 cc = select(target_fd+1, &fds, NULL, NULL, &tv);
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103 if (cc < 0) {
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104 if (errno == EINTR)
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105 continue;
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106 printf("back end error: failed select\n");
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107 return(-1);
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108 }
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109 if (cc < 1) {
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110 printf(
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111 "back end error: timeout waiting for command echo\n");
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112 return(-1);
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113 }
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114 cc = read(target_fd, echobuf + rcvd, cmdlen + 2 - rcvd);
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115 if (cc <= 0) {
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116 printf(
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117 "back end error: failed read after successful select\n");
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118 return(-1);
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119 }
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120 rcvd += cc;
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121 }
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122 if (bcmp(echobuf, cmdbuf, cmdlen + 2)) {
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123 printf("back end error: command echo mismatch\n");
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124 return(-1);
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125 } else
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126 return(0);
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127 }
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128
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129 /*
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130 * This functions reads the serial output from the target until a
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131 * '=' prompt is received. All intermediate output is passed to
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132 * stdout, with some hacks specific to this SIM interface back end.
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133 */
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134 tpinterf_pass_output(timeout)
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135 {
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136 char buf[1024], *cp;
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137 fd_set fds;
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Mychaela Falconia <falcon@freecalypso.org>
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138 struct timeval tv;
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Mychaela Falconia <falcon@freecalypso.org>
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139 int cc, newline = 1, termflag = 0;
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140 unsigned goodchar;
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141
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142 for (goodchar = 0; ; ) {
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143 FD_ZERO(&fds);
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diff changeset
144 FD_SET(target_fd, &fds);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 tv.tv_sec = timeout;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 tv.tv_usec = 0;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 cc = select(target_fd+1, &fds, NULL, NULL, &tv);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 if (cc < 0) {
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 if (errno == EINTR)
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 continue;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 printf("back end error: failed select\n");
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 return(-1);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 if (cc < 1) {
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 printf(
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 "back end error: timeout waiting for simagent response\n");
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 return(-1);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 cc = read(target_fd, buf + goodchar, sizeof(buf) - goodchar);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 if (cc <= 0) {
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 printf(
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 "back end error: failed read after successful select\n");
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 return(-1);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 for (cp = buf + goodchar; cc; cp++) {
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 cc--;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 if (*cp == '=' && newline && !cc)
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 break;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 if (*cp == '\n') {
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 newline = 1;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 termflag = 1;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 continue;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 newline = 0;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 if (*cp == '\r')
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 termflag = 1;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 if (!termflag)
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 goodchar++;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 if (goodchar >= 516)
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 termflag = 1;
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 if (!goodchar) {
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 printf("back end error: empty output from simagent\n");
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 return(-1);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 }
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 buf[goodchar] = '\0';
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 puts(buf);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 return(0);
deeeef558279 fcsim-calypso-be put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 }