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[114.145.5.195]) by smtp.googlemail.com with ESMTPSA id 98e67ed59e1d1-3613fa8e5d3sm3223150a91.2.2026.04.18.22.46.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Apr 2026 22:46:55 -0700 (PDT) From: Daniel Palmer To: buildroot@buildroot.org Cc: Daniel Palmer Date: Sun, 19 Apr 2026 14:46:45 +0900 Message-ID: <20260419054645.2019170-1-daniel@thingy.jp> X-Mailer: git-send-email 2.53.0 MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=thingy.jp; s=google; t=1776577617; x=1777182417; darn=buildroot.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=yueeA1RmOsL1HHLpfd/m04ar3dSnT5NaECK4tga8V6M=; b=hw3w7SX1IPIUnOgjbC+sjtOUP3JtDQ+w6hAozZLKViYAVDFR/0zrmXriIZsZMOs00y edxDOLDuYLaAcTrtSKKVboIETttAoRv2LpR7IOYDCIqflo6noYPacs2Vpwpiv/gbXDFY R/5DQRBDXehVeCUA8h8tXuD7gkTg17haFncz8= X-Mailman-Original-Authentication-Results: smtp2.osuosl.org; dmarc=none (p=none dis=none) header.from=thingy.jp X-Mailman-Original-Authentication-Results: smtp2.osuosl.org; dkim=pass (1024-bit key, unprotected) header.d=thingy.jp header.i=@thingy.jp header.a=rsa-sha256 header.s=google header.b=hw3w7SX1 Subject: [Buildroot] [RFC PATCH] m68k: Add 68000 nommu support X-BeenThere: buildroot@buildroot.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Discussion and development of buildroot List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: buildroot-bounces@buildroot.org Sender: "buildroot" Everyone thinks they like ARM but secretly they want to run Linux on their Megadrive[0]. Building a working toolchain/userland for nommu m68k is a bit difficult because of the bitrotten tools all over the place and one big issue is GCC generates code that uses unaligned accesses that will cause an exception on 68000 machines if you aren't careful. Buildroot can easily create a working toolchain and userland for nommu m68k so why not? 0 - This isn't a joke, I'm working on this. I have u-boot working on the Megadrive, Linux is already working on a bunch of 68000 machines and I just need to get everything a little bit smaller to get into 4MB of RAM. Signed-off-by: Daniel Palmer --- arch/Config.in.m68k | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/Config.in.m68k b/arch/Config.in.m68k index 235cafacf5b7..74a197934ff1 100644 --- a/arch/Config.in.m68k +++ b/arch/Config.in.m68k @@ -23,6 +23,11 @@ choice help Specific CPU variant to use +config BR2_m68k_68000 + bool "68000" + select BR2_m68k_m68k + select BR2_SOFT_FLOAT + config BR2_m68k_68030 bool "68030" select BR2_m68k_m68k @@ -41,6 +46,7 @@ config BR2_m68k_cf5208 endchoice config BR2_GCC_TARGET_CPU + default "68000" if BR2_m68k_68000 default "68030" if BR2_m68k_68030 default "68040" if BR2_m68k_68040 default "5208" if BR2_m68k_cf5208 -- 2.53.0 _______________________________________________ buildroot mailing list buildroot@buildroot.org https://lists.buildroot.org/mailman/listinfo/buildroot