- Add support to the loader for multiple consoles.
- Teach the i386 and pc98 loaders to honor multiple console requests from their respective boot2 binaries so that the same console(s) are used in both boot2 and the loader. - Since the kernel doesn't support multiple consoles, whichever console is listed first is treated as the "primary" console and is passed to the kernel in the boot_howto flags. PR: kern/66425 Submitted by: Gavin Atkinson gavin at ury dot york dot ac dot uk MFC after: 1 week
This commit is contained in:
parent
9389b62e52
commit
8b7c03a7a4
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=146698
@ -35,14 +35,15 @@ __FBSDID("$FreeBSD$");
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* Core console support
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*/
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static int cons_set(struct env_var *ev, int flags, void *value);
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static int cons_find(char *name);
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static int cons_set(struct env_var *ev, int flags, const void *value);
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static int cons_find(const char *name);
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static int cons_check(const char *string);
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static void cons_change(const char *string);
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/*
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* Detect possible console(s) to use. The first probed console
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* is marked active. Also create the console variable.
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*
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* XXX Add logic for multiple console support.
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* Detect possible console(s) to use. If preferred console(s) have been
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* specified, mark them as active. Else, mark the first probed console
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* as active. Also create the console variable.
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*/
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void
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cons_probe(void)
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@ -64,6 +65,9 @@ cons_probe(void)
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if (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT))
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active = cons;
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}
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/* Force a console even if all probes failed */
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if (active == -1)
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active = 0;
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/* Check to see if a console preference has already been registered */
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prefconsole = getenv("console");
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@ -71,21 +75,24 @@ cons_probe(void)
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prefconsole = strdup(prefconsole);
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if (prefconsole != NULL) {
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unsetenv("console"); /* we want to replace this */
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for (cons = 0; consoles[cons] != NULL; cons++)
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/* look for the nominated console, use it if it's functional */
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if (!strcmp(prefconsole, consoles[cons]->c_name) &&
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(consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)))
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active = cons;
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cons_change(prefconsole);
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} else {
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consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
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consoles[active]->c_init(0);
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prefconsole = strdup(consoles[active]->c_name);
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}
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printf("Consoles: ");
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (consoles[cons]->c_flags & (C_ACTIVEIN | C_ACTIVEOUT))
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printf("%s ", consoles[cons]->c_desc);
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printf("\n");
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if (prefconsole != NULL) {
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env_setenv("console", EV_VOLATILE, prefconsole, cons_set,
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env_nounset);
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free(prefconsole);
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}
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if (active == -1)
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active = 0;
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consoles[active]->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT);
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consoles[active]->c_init(0);
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printf("Console: %s\n", consoles[active]->c_desc);
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env_setenv("console", EV_VOLATILE, consoles[active]->c_name, cons_set,
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env_nounset);
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}
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int
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@ -128,46 +135,93 @@ putchar(int c)
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consoles[cons]->c_out(c);
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}
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static int
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cons_find(char *name)
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{
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int cons;
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (!strcmp(consoles[cons]->c_name, name))
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return(cons);
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return(-1);
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}
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/*
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* Select a console.
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*
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* XXX Note that the console system design allows for some extension
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* here (eg. multiple consoles, input/output only, etc.)
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* Find the console with the specified name.
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*/
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static int
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cons_set(struct env_var *ev, int flags, void *value)
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cons_find(const char *name)
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{
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int cons, active;
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int cons;
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if ((value == NULL) || ((active = cons_find(value)) == -1)) {
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (!strcmp(consoles[cons]->c_name, name))
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return (cons);
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return (-1);
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}
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/*
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* Select one or more consoles.
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*/
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static int
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cons_set(struct env_var *ev, int flags, const void *value)
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{
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int cons;
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if ((value == NULL) || (cons_check(value) == -1)) {
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if (value != NULL)
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printf("no such console '%s'\n", (char *)value);
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printf("no such console!\n");
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printf("Available consoles:\n");
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for (cons = 0; consoles[cons] != NULL; cons++)
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printf(" %s\n", consoles[cons]->c_name);
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return(CMD_ERROR);
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}
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/* disable all current consoles */
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for (cons = 0; consoles[cons] != NULL; cons++)
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consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT);
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/* enable selected console */
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consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
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consoles[active]->c_init(0);
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cons_change(value);
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env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
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return(CMD_OK);
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}
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/*
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* Check that all of the consoles listed in *string are valid consoles
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*/
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static int
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cons_check(const char *string)
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{
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int cons;
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char *curpos, *dup, *next;
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dup = next = strdup(string);
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cons = -1;
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while (next != NULL) {
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curpos = strsep(&next, " ,");
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if (*curpos != '\0') {
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cons = cons_find(curpos);
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if (cons == -1)
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break;
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}
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}
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free(dup);
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return (cons);
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}
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/*
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* Activate all of the consoles listed in *string and disable all the others.
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*/
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static void
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cons_change(const char *string)
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{
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int cons;
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char *curpos, *dup, *next;
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/* Disable all consoles */
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for (cons = 0; consoles[cons] != NULL; cons++) {
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consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT);
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}
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/* Enable selected consoles */
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dup = next = strdup(string);
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while (next != NULL) {
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curpos = strsep(&next, " ,");
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if (*curpos == '\0')
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continue;
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cons = cons_find(curpos);
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if (cons > 0) {
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consoles[cons]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
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consoles[cons]->c_init(0);
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}
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}
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free(dup);
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}
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@ -65,6 +65,7 @@ will probe for a console and set the
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variable, or set it to serial console
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.Pq Dq comconsole
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if the previous boot stage used that.
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If multiple consoles are selected, they will be listed separated by spaces.
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Then, devices are probed,
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.Va currdev
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and
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@ -391,7 +392,11 @@ List of semicolon-separated search path for bootable kernels.
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The default is
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.Dq Li kernel .
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.It Va console
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Defines the current console.
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Defines the current console or consoles.
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Multiple consoles may be specified.
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In that case, the first listed console will become the default console for
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userland output (e.g. from
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.Xr init 8 ).
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.It Va currdev
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Selects the default device.
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Syntax for devices is odd.
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@ -59,10 +59,12 @@ int
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bi_getboothowto(char *kargs)
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{
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char *cp;
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char *curpos, *next, *string;
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int howto;
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int active;
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int i;
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int vidconsole;
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/* Parse kargs */
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howto = 0;
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if (kargs != NULL) {
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@ -117,10 +119,34 @@ bi_getboothowto(char *kargs)
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for (i = 0; howto_names[i].ev != NULL; i++)
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if (getenv(howto_names[i].ev) != NULL)
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howto |= howto_names[i].mask;
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if (!strcmp(getenv("console"), "comconsole"))
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howto |= RB_SERIAL;
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if (!strcmp(getenv("console"), "nullconsole"))
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howto |= RB_MUTE;
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/* Enable selected consoles */
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string = next = strdup(getenv("console"));
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vidconsole = 0;
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while (next != NULL) {
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curpos = strsep(&next, " ,");
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if (*curpos == '\0')
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continue;
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if (!strcmp(curpos, "vidconsole"))
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vidconsole = 1;
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else if (!strcmp(curpos, "comconsole"))
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howto |= RB_SERIAL;
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else if (!strcmp(curpos, "nullconsole"))
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howto |= RB_MUTE;
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}
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if (vidconsole && (howto & RB_SERIAL))
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howto |= RB_MULTIPLE;
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/*
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* XXX: Note that until the kernel is ready to respect multiple consoles
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* for the boot messages, the first named console is the primary console
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*/
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if (!strcmp(string, "vidconsole"))
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howto &= ~RB_SERIAL;
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free(string);
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return(howto);
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}
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* We can use printf() etc. once this is done.
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* If the previous boot stage has requested a serial console, prefer that.
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*/
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if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole", 1);
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if (initial_howto & RB_MUTE)
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setenv("console", "nullconsole", 1);
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if (initial_howto & RB_MULTIPLE)
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if (initial_howto & RB_MULTIPLE) {
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setenv("boot_multicons", "YES", 1);
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if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole vidconsole", 1);
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else
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setenv("console", "vidconsole comconsole", 1);
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} else if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole", 1);
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else if (initial_howto & RB_MUTE)
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setenv("console", "nullconsole", 1);
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cons_probe();
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/*
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* We can use printf() etc. once this is done.
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* If the previous boot stage has requested a serial console, prefer that.
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*/
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if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole", 1);
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if (initial_howto & RB_MUTE)
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setenv("console", "nullconsole", 1);
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if (initial_howto & RB_MULTIPLE)
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if (initial_howto & RB_MULTIPLE) {
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setenv("boot_multicons", "YES", 1);
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if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole vidconsole", 1);
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else
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setenv("console", "vidconsole comconsole", 1);
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} else if (initial_howto & RB_SERIAL)
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setenv("console", "comconsole", 1);
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else if (initial_howto & RB_MUTE)
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setenv("console", "nullconsole", 1);
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cons_probe();
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/*
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