Date: Thu, 6 Sep 2018 16:01:13 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: Craig Leres <leres@freebsd.org>, lev@FreeBSD.org, gljennjohn@gmail.com Cc: freebsd-hackers@freebsd.org, Allan Jude <allanjude@freebsd.org> Subject: Re: Is here way to have 9600+ serial console and see boot0 message? Message-ID: <1031e4b8-08ed-a084-4398-af0fd15671b7@FreeBSD.org> In-Reply-To: <264c2f26-dda5-129c-5cab-513bb1cb4132@freebsd.org> References: <ac3fe50c-d9a0-96ba-28f0-84ffca8e4cd3@FreeBSD.org> <14cd401a-660c-1a3a-8d80-677a42727146@freebsd.org> <0bc33818-641c-07db-194b-66fd1eb30c55@FreeBSD.org> <36485aef-0fdd-bcb1-993e-e334a1cd81ab@FreeBSD.org> <f718fbf2-4433-f9be-7ce2-24a91f78c6cb@FreeBSD.org> <20180906191109.49f9d0ab@ernst.home> <7dd2224d-f109-c585-5ee9-a1cc2c09d20e@FreeBSD.org> <264c2f26-dda5-129c-5cab-513bb1cb4132@freebsd.org>
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From: Jung-uk Kim <jkim@FreeBSD.org>
To: Craig Leres <leres@freebsd.org>, lev@FreeBSD.org, gljennjohn@gmail.com
Cc: freebsd-hackers@freebsd.org, Allan Jude <allanjude@freebsd.org>
Message-ID: <1031e4b8-08ed-a084-4398-af0fd15671b7@FreeBSD.org>
Subject: Re: Is here way to have 9600+ serial console and see boot0 message?
References: <ac3fe50c-d9a0-96ba-28f0-84ffca8e4cd3@FreeBSD.org>
<14cd401a-660c-1a3a-8d80-677a42727146@freebsd.org>
<0bc33818-641c-07db-194b-66fd1eb30c55@FreeBSD.org>
<36485aef-0fdd-bcb1-993e-e334a1cd81ab@FreeBSD.org>
<f718fbf2-4433-f9be-7ce2-24a91f78c6cb@FreeBSD.org>
<20180906191109.49f9d0ab@ernst.home>
<7dd2224d-f109-c585-5ee9-a1cc2c09d20e@FreeBSD.org>
<264c2f26-dda5-129c-5cab-513bb1cb4132@freebsd.org>
In-Reply-To: <264c2f26-dda5-129c-5cab-513bb1cb4132@freebsd.org>
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On 18. 9. 6., Craig Leres wrote:
> On 9/6/18 8:17 AM, Lev Serebryakov wrote:
>> =C2=A0=C2=A0 Nope. If BOOT_BOOT0_COMCONSOLE_SPEED defined, it is used =
as-is. If it
>> is not defined it is derived from BOOT_COMCONSOLE_SPEED. So, defining =
it
>> to "0" should work. And disassembling boot0sio confirms it.
>>
>> .if !defined(BOOT_BOOT0_COMCONSOLE_SPEED)
>> BOOT_COMCONSOLE_SPEED?=3D=C2=A0=C2=A0=C2=A0 9600
>> .if ${BOOT_COMCONSOLE_SPEED} =3D=3D 9600
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "7 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 4800
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "6 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 2400
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "5 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 1200
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "4 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 600
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "3 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 300
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "2 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 150
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "1 << 5 + 3"
>> .elif ${BOOT_COMCONSOLE_SPEED} =3D=3D 110
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "0 << 5 + 3"
>> .else
>> BOOT_BOOT0_COMCONSOLE_SPEED=3D=C2=A0=C2=A0=C2=A0 "7 << 5 + 3"
>> .endif
>> .endif
>=20
> Maybe I don't understand what you're saying but I don't think defining
> to "0" is the same as not defining.
=2E..
Defining BOOT_BOOT0_COMCONSOLE_SPEED to 0 is not the same as not
defining, of course. However, setting it to 0 lets us add
"-DCOMSPEED=3D0" to CFLAGS[1] and we can skip port configuration[2].
Jung-uk Kim
1.
https://svnweb.freebsd.org/base/head/stand/i386/boot0/Makefile?revision=3D=
328769&view=3Dmarkup#l75
2.
https://svnweb.freebsd.org/base/head/stand/i386/boot0/boot0.S?revision=3D=
325834&view=3Dmarkup#l211
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