From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx.dlasys.net (24.152.213.223.res-cmts.eph.ptd.net [24.152.213.223]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id 56BF067C17 for ; Mon, 16 Oct 2006 07:14:53 +1000 (EST) Message-ID: <4532A430.6060208@dlasys.net> Date: Sun, 15 Oct 2006 17:12:16 -0400 From: "David H. Lynch Jr." MIME-Version: 1.0 To: Robert Corley Subject: Re: uartlite with 2.6.17 kernel and kernel early text messages References: <20061013204442.52818.qmail@web56308.mail.re3.yahoo.com> In-Reply-To: <20061013204442.52818.qmail@web56308.mail.re3.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: linux linuxppc-embedded List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Robert Corley wrote: > I am still trying to get the UARTLITE to work with 2.6 and a plb_temac design. I am using EDK 7.1. I have generated the edk files and copied xparameters_ml300.h to arch/ppc/platforms/4xx/xparameters.xparameters_ml403.h > > In an effort to get past the "Rebooting to System ACE Configuration Address 6..." message, I have selected "support for early boot texts over serial port" in kernel debugging. > I do not think Peter's driver actually supports early boot texts. I beleive the patches David Bolcsfoldi posted add early boot support. If you can not get that working I posted a driver in January (as part of a patchset for the Pico E12) that has early boot support - though on inspection David's patches looked like they should work. > FYI, I'm using Peter's patches to create the uartlite.c and associated files and have selected the uartlite using make menuconfig. > > The first error is as follows: > athena startup_network # make ARCH=ppc zImage.initrd > CHK include/linux/version.h > CHK include/linux/compile.h > dnsdomainname: Unknown host > CC arch/ppc/syslib/gen550_dbg.o > arch/ppc/syslib/gen550_dbg.c:36: error: `RS_TABLE_SIZE' undeclared here (not in a function) > arch/ppc/syslib/gen550_dbg.c:38: error: empty scalar initializer > arch/ppc/syslib/gen550_dbg.c:38: error: (near initialization for `rs_table') > arch/ppc/syslib/gen550_dbg.c:36: error: storage size of `rs_table' isn't known > arch/ppc/syslib/gen550_dbg.c:36: warning: 'rs_table' defined but not used > make[1]: *** [arch/ppc/syslib/gen550_dbg.o] Error 1 > make: *** [arch/ppc/syslib] Error 2 > Unless you actually have an 8250 based Uart in your system - and you are not configured for one, then arch/ppc/syslib/gen550_dbg should NOT be getting built. Proper early boot text support for the UartLite requires both a replacement for this AND changes to use those instead of gen550_dbg.c > so, I modified the gen550_dbg.c file to #include the xparameters.h, where the RS_TABLE_SIZE is defined > but still get more errors. Here they are: > You do not want to touch gen550_dbg.c You need a new uartlite_dbg.c and Makefile and other changes to use it. > CHK include/linux/version.h > CHK include/linux/compile.h > dnsdomainname: Unknown host > CC arch/ppc/syslib/gen550_dbg.o > arch/ppc/syslib/gen550_dbg.c:37: error: `XPAR_UARTNS550_0_CLOCK_FREQ_HZ' undeclared here (not in a function) > arch/ppc/syslib/gen550_dbg.c:37: error: initializer element is not constant > arch/ppc/syslib/gen550_dbg.c:37: error: (near initialization for `rs_table[0].baud_base') > arch/ppc/syslib/gen550_dbg.c:37: error: `XPAR_INTC_0_UARTNS550_0_VEC_ID' undeclared here (not in a function) > arch/ppc/syslib/gen550_dbg.c:37: error: initializer element is not constant > arch/ppc/syslib/gen550_dbg.c:37: error: (near initialization for `rs_table[0].irq') > arch/ppc/syslib/gen550_dbg.c:37: error: `XPAR_UARTNS550_0_BASEADDR' undeclared here (not in a function) > arch/ppc/syslib/gen550_dbg.c:37: error: initializer element is not constant > arch/ppc/syslib/gen550_dbg.c:37: error: (near initialization for `rs_table[0].iomem_base') > arch/ppc/syslib/gen550_dbg.c:37: error: initializer element is not constant > arch/ppc/syslib/gen550_dbg.c:37: error: (near initialization for `rs_table[0]') > make[1]: *** [arch/ppc/syslib/gen550_dbg.o] Error 1 > make: *** [arch/ppc/syslib] Error 2 > > Questions: > > 1. Now, is this an issue with the UARTLITE driver or is it just not supported for early messaging? > Peters does not support early boot texts. Both David's and my drivers do as do David's patches to Peter's driver./ > 2. What am I missing w.r.t. getting something out of the serial port? > 3. I am assuming that the boot args for a initrd boot are: "console=ttyUL0 ip=off root=/dev/ram rw", correct? > Presuming you have no other serial device I think you should not need any console= argument at all. > -corley > > > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded > -- Dave Lynch DLA Systems Software Development: Embedded Linux 717.627.3770 dhlii@dlasys.net http://www.dlasys.net fax: 1.253.369.9244 Cell: 1.717.587.7774 Over 25 years' experience in platforms, languages, and technologies too numerous to list. "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction." Albert Einstein