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author | Arnd Bergmann <arnd@arndb.de> | 2022-03-09 14:20:20 +0100 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2022-03-17 09:13:13 +0100 |
commit | 2f618d5ef5dd05e2380ee627814de90d5a33c3f2 (patch) | |
tree | 5e2b444654accf60d2a4d7e3dc1620931f2a69f4 /arch/arm/mach-footbridge/include/mach/io.h | |
parent | a483b1b232e616d0095a59b987ffc739bc1b56bc (diff) | |
download | linux-2f618d5ef5dd05e2380ee627814de90d5a33c3f2.tar.gz |
ARM: remove support for NOMMU ARMv4/v5
It is possible to build MMU-less kernels for Cortex-M base microcrontrollers as well as a couple of older platforms that have not been converted to CONFIG_ARCH_MULTIPLATFORM, specifically ep93xx, footbridge, dove, sa1100 and s3c24xx. It seems unlikely that anybody has tested those configurations in recent years, as even building them is frequently broken. A patch I submitted caused another build time regression in this configuration. I sent a patch for that, but it seems better to also remove the option entirely, leaving ARMv7-M as the only supported Arm NOMMU target for simplicity. A couple of platforms have dependencies on CONFIG_MMU, those can all be removed now. Notably, mach-integrator tries to support MMU-less CPU cores, but those have not actually been selectable for a long time. This addresses several build failures in randconfig builds that have accumulated over the years. Cc: Vladimir Murzin <vladimir.murzin@arm.com> Cc: Russell King <linux@armlinux.org.uk> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-footbridge/include/mach/io.h')
-rw-r--r-- | arch/arm/mach-footbridge/include/mach/io.h | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/arch/arm/mach-footbridge/include/mach/io.h b/arch/arm/mach-footbridge/include/mach/io.h deleted file mode 100644 index 4e18b921373f..000000000000 --- a/arch/arm/mach-footbridge/include/mach/io.h +++ /dev/null @@ -1,20 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * arch/arm/mach-footbridge/include/mach/io.h - * - * Copyright (C) 1997-1999 Russell King - * - * Modifications: - * 06-12-1997 RMK Created. - * 07-04-1999 RMK Major cleanup - */ -#ifndef __ASM_ARM_ARCH_IO_H -#define __ASM_ARM_ARCH_IO_H - -/* - * Translation of various i/o addresses to host addresses for !CONFIG_MMU - */ -#define PCIO_BASE 0x7c000000 -#define __io(a) ((void __iomem *)(PCIO_BASE + (a))) - -#endif |