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Re: [patch] Mips64 Ocelot-C and Jaguar ATX platform support

To: William Jhun <wjhun@Oswego.EDU>
Subject: Re: [patch] Mips64 Ocelot-C and Jaguar ATX platform support
From: Louis Hamilton <>
Date: Mon, 28 Jul 2003 15:20:14 -0500
Original-recipient: rfc822;
References: <>
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.7) Gecko/20011226

William Jhun wrote:


Using Ralf's pre-packaged mips64 gcc 2.95.4 / binutils .rpm, I
wasn't able to get this to build without having CPU-specific gcc opts
(patch below, please verify what flags are appropriate). Also, shouldn't

Arggh.. my (different) build environment meant messing with options in my
arch/mips64/Makefile (like using "-march=rm9000" instead of "-mcpu=r8000 -mips4").
The CFLAGS change below looks fine.
Btw, an ifdef for CONFIG_CPU_RM7000 will be required too, using the
same CFLAGS options as the rm9000.

define_bool CONFIG_BOOT_ELF32 y

be in the in the jaguar section?

At this point (with latest linux_2_4 tree), I can boot the kernel but get
a hang after mounting NFS root via the gt64340 eth0. If I can find a
serial cable for the second port, I might try to step with kgdb...



Index: arch/mips64/Makefile
RCS file: /home/cvs/linux/arch/mips64/Makefile,v
retrieving revision
diff -U3 -r1.22.2.34 Makefile
--- arch/mips64/Makefile        5 Jul 2003 13:17:04 -0000
+++ arch/mips64/Makefile        28 Jul 2003 18:37:47 -0000
@@ -79,6 +79,9 @@
#CFLAGS                += -mips64      # Should be used then we get a
MIPS64 compiler
CFLAGS         += -mcpu=r8000 -mips4
+ifdef CONFIG_CPU_RM9000
+GCCFLAGS       += -mcpu=r8000 -mips4

# We unconditionally build the math emulator

On Wed, 23 Jul 2003, Louis Hamilton wrote:


Here is 64-bit support for both the RM7000-based Ocelot-C and
RM9000-based Jaguar ATX platforms.
Since the port was 2.4.21 based, this patch submission is for the 2.4 tree.
This patch supersedes the Ocelot-C patch I sent earlier, since it
encompasses both platforms.

Notes the board support lives under arch/mips/momentum.
Also, CONFIG_BOARD_SCACHE and CONFIG_RM7000_CPU_SCACHE are utilized and
integrated into each platform's default configuration files.
As in the first patch, drivers/net/mv64340_eth.{c,h} is added to provide
ethernet support.

If it looks ok, please check changes into the tree.


Louis Hamilton
Red Hat, Inc.

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