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Improve defaults for per-CPU kernel console colors, especially with 2

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or 4 CPUs.  Add a compile-time option SC_KERNEL_CONS_ATTRS to control the
defaults.

Default to color numbers in reverse order to CPU numbers (instead of
in the same order with white first and wrapping to dark grey), so that
the brightest bright colors are used first.  Don't use dark grey at all;
replace it by dark green.

Syscons has too many compile-time options, but this one is needed in
in case the defaults give something like white on white, or the user
really hates this feature and can't wait to turn it off in rc.

MFC after:	next release?
This commit is contained in:
Bruce Evans 2018-06-02 14:07:27 +00:00
parent fa49511709
commit 9729130321
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=334530
4 changed files with 40 additions and 8 deletions
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26
share/man/man4/syscons.4
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@ -26,7 +26,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 21, 2016
.Dd June 2, 2018
.Dt SYSCONS 4
.Os
.Sh NAME
@ -53,6 +53,7 @@
.Cd "options SC_NORM_ATTR=_attribute_"
.Cd "options SC_NORM_REV_ATTR=_attribute_"
.Cd "options SC_KERNEL_CONS_ATTR=_attribute_"
.Cd "options SC_KERNEL_CONS_ATTRS=_attributes_"
.Cd "options SC_KERNEL_CONS_REV_ATTR=_attribute_"
.Cd "options SC_DFLT_FONT"
.Cd "makeoptions SC_DFLT_FONT=_font_name_"
@ -341,6 +342,7 @@ above.
.It Dv SC_NORM_ATTR=_attribute_
.It Dv SC_NORM_REV_ATTR=_attribute_
.It Dv SC_KERNEL_CONS_ATTR=_attribute_
.It Dv SC_KERNEL_CONS_ATTRS=_attributes_
.It Dv SC_KERNEL_CONS_REV_ATTR=_attribute_
These options will set the default colors.
Available colors are defined in
@ -348,6 +350,11 @@ Available colors are defined in
See
.Sx EXAMPLES
below.
.Dv SC_KERNEL_CONS_ATTRS
is a character string giving a sequence of attributes in binary format.
The sequence will be repeated up to the number of CPUs.
Beware that the string must not be null,
since the kernel divides by its length.
.It Dv SC_DFLT_FONT
This option will specify the default font.
Available fonts are: iso, iso2, koi8-r, koi8-u, cp437, cp850, cp865,
@ -539,6 +546,23 @@ The reversed message will be black on red background.
.Dl "options SC_KERNEL_CONS_ATTR=(FG_LIGHTRED|BG_BLACK)"
.Dl "options SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)"
.Pp
Provided
.Dv SC_KERNEL_CONS_ATTR
is not set, or is set to its default of bright white on black,
the following line will set 4 red-ish colors
for printing kernel messages in colors depending on the CPU.
.Pp
.Dl options SC_KERNEL_CONS_ATTRS=\e"\ex0c\ex04\ex40\ex0e\e"
.Pp
The default scheme is probably better for up to 8 CPUs.
Use a long string to get unique colors for more than 8 CPUs.
.Pp
To turn off all per-CPU coloring of kernel messages,
set SC_KERNEL_CONS_ATTR to a non-default value,
or use the default in a pattern of length 1.
.Pp
.Dl options SC_KERNEL_CONS_ATTRS=\e"\ex0f\e"
.Pp
The following example adds the font files
.Pa cp850-8x16.fnt ,
.Pa cp850-8x14.font

1
sys/conf/NOTES
View File

@ -1474,6 +1474,7 @@ options SC_PIXEL_MODE # add support for the raster text mode
options SC_NORM_ATTR=(FG_GREEN|BG_BLACK)
options SC_NORM_REV_ATTR=(FG_YELLOW|BG_GREEN)
options SC_KERNEL_CONS_ATTR=(FG_RED|BG_BLACK)
options SC_KERNEL_CONS_ATTRS=\"\x0c\x0d\x0e\x0f\x02\x09\x0a\x0b\"
options SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)
# The following options will let you change the default behavior of

1
sys/conf/options
View File

@ -774,6 +774,7 @@ SC_DISABLE_KDBKEY opt_syscons.h
SC_DISABLE_REBOOT opt_syscons.h
SC_HISTORY_SIZE opt_syscons.h
SC_KERNEL_CONS_ATTR opt_syscons.h
SC_KERNEL_CONS_ATTRS opt_syscons.h
SC_KERNEL_CONS_REV_ATTR opt_syscons.h
SC_MOUSE_CHAR opt_syscons.h
SC_NO_CUTPASTE opt_syscons.h

20
sys/dev/syscons/syscons.c
View File

@ -3153,6 +3153,17 @@ scinit(int unit, int flags)
static u_char font_16[256*16];
#endif
#ifdef SC_KERNEL_CONS_ATTRS
static const u_char dflt_kattrtab[] = SC_KERNEL_CONS_ATTRS;
#elif SC_KERNEL_CONS_ATTR == FG_WHITE
static const u_char dflt_kattrtab[] = {
FG_WHITE, FG_YELLOW, FG_LIGHTMAGENTA, FG_LIGHTRED,
FG_LIGHTCYAN, FG_LIGHTGREEN, FG_LIGHTBLUE, FG_GREEN,
0,
};
#else
static const u_char dflt_kattrtab[] = { FG_WHITE, 0, };
#endif
sc_softc_t *sc;
scr_stat *scp;
video_adapter_t *adp;
@ -3163,13 +3174,8 @@ scinit(int unit, int flags)
/* one time initialization */
if (init_done == COLD) {
sc_get_bios_values(&bios_value);
for (i = 0; i < nitems(sc_kattrtab); i++) {
#if SC_KERNEL_CONS_ATTR == FG_WHITE
sc_kattrtab[i] = 8 + (i + FG_WHITE) % 8U;
#else
sc_kattrtab[i] = SC_KERNEL_CONS_ATTR;
#endif
}
for (i = 0; i < nitems(sc_kattrtab); i++)
sc_kattrtab[i] = dflt_kattrtab[i % (nitems(dflt_kattrtab) - 1)];
}
init_done = WARM;