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Add the ability to specify the boot2 serial console speed in

Browse source 
/boot.config or on the "boot:" prompt line via a "-S<speed>" flag,
e.g. "-h -S19200". This adds about 50 bytes to the size of boot2
and required a few other small changes to limit the size impact.
This changes only affects boot2; there are further loader changes
to follow.
This commit is contained in:
Ian Dowse 2005-08-18 00:42:45 +00:00
parent ef0a6e203b
commit a00a259113
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149212
5 changed files with 81 additions and 36 deletions
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26
sbin/reboot/boot_i386.8
View file

@ -36,7 +36,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd September 30, 2004
.Dd August 18, 2005
.Dt BOOT 8 i386
.Os
.Sh NAME
@ -126,9 +126,12 @@ the listing will be of the relevant subdirectory.)
.It Xo
.Sm off
.Ar bios_drive : interface ( unit , Oo Ar slice , Oc Ar part )
.Sm on
.Ar filename
.Sm on
.Op Fl aCcDdghmnPprsv
.Sm off
.Op Fl S Ar speed
.Sm on
.Xc
Specify boot file and flags.
.Bl -tag -width indent
@ -186,9 +189,13 @@ slice) is booted from.
The pathname of the file to boot (relative to the root directory
on the specified partition).
Defaults to
.Pa /kernel .
.Pa /boot/kernel/kernel .
Symbolic links are not supported (hard links are).
.It Fl aCcDdghmnPprsv
.It Xo Op Fl aCcDdghmnPprsv
.Sm off
.Op Fl S Ar speed
.Sm on
.Xc
Boot flags:
.Pp
.Bl -tag -width "-CXX" -compact
@ -263,6 +270,17 @@ boot into single-user mode; if the console is marked as
(see
.Xr ttys 5 ) ,
the root password must be entered.
.It Xo Sm off
.Fl S Ar speed
.Sm on
.Xc
set the speed of the serial console to
.Ar speed .
The default is 9600 unless it has been overridden by setting
.Va BOOT_COMCONSOLE_SPEED
in
.Pa /etc/make.conf
and recompiling the boot blocks.
.It Fl v
be verbose during device probing (and later).
.El

41
sys/boot/i386/boot2/boot2.c
View file

@ -63,7 +63,6 @@ __FBSDID("$FreeBSD$");
#define RBX_NOINTR 0x1c /* -n */
/* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
#define RBX_DUAL 0x1d /* -D */
#define RBX_PROBEKBD 0x1e /* -P */
/* 0x1f is reserved for log2(RB_BOOTINFO). */
/* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
@ -91,7 +90,7 @@ __FBSDID("$FreeBSD$");
extern uint32_t _end;
static const char optstr[NOPT] = "DhaCgmnPprsv";
static const char optstr[NOPT] = "DhaCgmnprsv"; /* Also 'P', 'S' */
static const unsigned char flags[NOPT] = {
RBX_DUAL,
RBX_SERIAL,
@ -100,7 +99,6 @@ static const unsigned char flags[NOPT] = {
RBX_GDB,
RBX_MUTE,
RBX_NOINTR,
RBX_PROBEKBD,
RBX_PAUSE,
RBX_DFLTROOT,
RBX_SINGLE,
@ -122,6 +120,7 @@ static struct dsk {
static char cmd[512];
static char kname[1024];
static uint32_t opts;
static int comspeed = SIOSPD;
static struct bootinfo bootinfo;
static uint8_t ioctrl = IO_KEYBOARD;
@ -390,34 +389,48 @@ static int
parse()
{
char *arg = cmd;
char *p, *q;
char *ep, *p, *q;
const char *cp;
unsigned int drv;
int c, i;
int c, i, j;
while ((c = *arg++)) {
if (c == ' ' || c == '\t' || c == '\n')
continue;
for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
ep = p;
if (*p)
*p++ = 0;
if (c == '-') {
while ((c = *arg++)) {
if (c == 'P') {
if (*(uint8_t *)PTOV(0x496) & 0x10) {
cp = "yes";
} else {
opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL;
cp = "no";
}
printf("Keyboard: %s\n", cp);
continue;
} else if (c == 'S') {
j = 0;
while ((unsigned int)(i = *arg++ - '0') <= 9)
j = j * 10 + i;
if (j > 0 && i == -'0') {
comspeed = j;
break;
}
/* Fall through to error below ('S' not in optstr[]). */
}
for (i = 0; c != optstr[i]; i++)
if (i == NOPT - 1)
return -1;
opts ^= 1 << flags[i];
}
if (opts & 1 << RBX_PROBEKBD) {
i = *(uint8_t *)PTOV(0x496) & 0x10;
printf("Keyboard: %s\n", i ? "yes" : "no");
if (!i)
opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL;
opts &= ~(1 << RBX_PROBEKBD);
}
ioctrl = opts & 1 << RBX_DUAL ? (IO_SERIAL|IO_KEYBOARD) :
opts & 1 << RBX_SERIAL ? IO_SERIAL : IO_KEYBOARD;
if (ioctrl & IO_SERIAL)
sio_init();
sio_init(115200 / comspeed);
} else {
for (q = arg--; *q && *q != '('; q++);
if (*q) {
@ -459,7 +472,7 @@ parse()
? DRV_HARD : 0) + drv;
dsk_meta = 0;
}
if ((i = p - arg - !*(p - 1))) {
if ((i = ep - arg)) {
if ((size_t)i >= sizeof(kname))
return -1;
memcpy(kname, arg, i + 1);

2
sys/boot/i386/boot2/lib.h
View file

@ -17,7 +17,7 @@
* $FreeBSD$
*/
void sio_init(void);
void sio_init(int);
void sio_flush(void);
void sio_putc(int);
int sio_getc(void);

7
sys/boot/i386/boot2/sio.S
View file

@ -17,7 +17,6 @@
.set SIO_PRT,SIOPRT # Base port
.set SIO_FMT,SIOFMT # 8N1
.set SIO_DIV,(115200/SIOSPD) # 115200 / SPD
.globl sio_init
.globl sio_flush
@ -25,14 +24,14 @@
.globl sio_getc
.globl sio_ischar
/* void sio_init(void) */
/* void sio_init(int div) */
sio_init: movw $SIO_PRT+0x3,%dx # Data format reg
movb $SIO_FMT|0x80,%al # Set format
outb %al,(%dx) # and DLAB
pushl %edx # Save
subb $0x3,%dl # Divisor latch reg
movw $SIO_DIV,%ax # Set
movl 0x8(%esp),%eax # Set
outw %ax,(%dx) # BPS
popl %edx # Restore
movb $SIO_FMT,%al # Clear
@ -41,6 +40,8 @@ sio_init: movw $SIO_PRT+0x3,%dx # Data format reg
movb $0x3,%al # Set RTS,
outb %al,(%dx) # DTR
incl %edx # Line status reg
call sio_flush
ret $0x4
/* void sio_flush(void) */

41
sys/boot/i386/gptboot/gptboot.c
View file

@ -63,7 +63,6 @@ __FBSDID("$FreeBSD$");
#define RBX_NOINTR 0x1c /* -n */
/* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
#define RBX_DUAL 0x1d /* -D */
#define RBX_PROBEKBD 0x1e /* -P */
/* 0x1f is reserved for log2(RB_BOOTINFO). */
/* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
@ -91,7 +90,7 @@ __FBSDID("$FreeBSD$");
extern uint32_t _end;
static const char optstr[NOPT] = "DhaCgmnPprsv";
static const char optstr[NOPT] = "DhaCgmnprsv"; /* Also 'P', 'S' */
static const unsigned char flags[NOPT] = {
RBX_DUAL,
RBX_SERIAL,
@ -100,7 +99,6 @@ static const unsigned char flags[NOPT] = {
RBX_GDB,
RBX_MUTE,
RBX_NOINTR,
RBX_PROBEKBD,
RBX_PAUSE,
RBX_DFLTROOT,
RBX_SINGLE,
@ -122,6 +120,7 @@ static struct dsk {
static char cmd[512];
static char kname[1024];
static uint32_t opts;
static int comspeed = SIOSPD;
static struct bootinfo bootinfo;
static uint8_t ioctrl = IO_KEYBOARD;
@ -390,34 +389,48 @@ static int
parse()
{
char *arg = cmd;
char *p, *q;
char *ep, *p, *q;
const char *cp;
unsigned int drv;
int c, i;
int c, i, j;
while ((c = *arg++)) {
if (c == ' ' || c == '\t' || c == '\n')
continue;
for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
ep = p;
if (*p)
*p++ = 0;
if (c == '-') {
while ((c = *arg++)) {
if (c == 'P') {
if (*(uint8_t *)PTOV(0x496) & 0x10) {
cp = "yes";
} else {
opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL;
cp = "no";
}
printf("Keyboard: %s\n", cp);
continue;
} else if (c == 'S') {
j = 0;
while ((unsigned int)(i = *arg++ - '0') <= 9)
j = j * 10 + i;
if (j > 0 && i == -'0') {
comspeed = j;
break;
}
/* Fall through to error below ('S' not in optstr[]). */
}
for (i = 0; c != optstr[i]; i++)
if (i == NOPT - 1)
return -1;
opts ^= 1 << flags[i];
}
if (opts & 1 << RBX_PROBEKBD) {
i = *(uint8_t *)PTOV(0x496) & 0x10;
printf("Keyboard: %s\n", i ? "yes" : "no");
if (!i)
opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL;
opts &= ~(1 << RBX_PROBEKBD);
}
ioctrl = opts & 1 << RBX_DUAL ? (IO_SERIAL|IO_KEYBOARD) :
opts & 1 << RBX_SERIAL ? IO_SERIAL : IO_KEYBOARD;
if (ioctrl & IO_SERIAL)
sio_init();
sio_init(115200 / comspeed);
} else {
for (q = arg--; *q && *q != '('; q++);
if (*q) {
@ -459,7 +472,7 @@ parse()
? DRV_HARD : 0) + drv;
dsk_meta = 0;
}
if ((i = p - arg - !*(p - 1))) {
if ((i = ep - arg)) {
if ((size_t)i >= sizeof(kname))
return -1;
memcpy(kname, arg, i + 1);