diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2022-03-09 14:20:20 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-03-17 09:13:13 +0100 |
| commit | 2f618d5ef5dd05e2380ee627814de90d5a33c3f2 (patch) | |
| tree | 5e2b444654accf60d2a4d7e3dc1620931f2a69f4 /arch/arm/mach-integrator/hardware.h | |
| parent | a483b1b232e616d0095a59b987ffc739bc1b56bc (diff) | |
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-integrator/hardware.h')
| -rw-r--r-- | arch/arm/mach-integrator/hardware.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/arm/mach-integrator/hardware.h b/arch/arm/mach-integrator/hardware.h index 4d6ade3dd4ee..81ce09e3ad45 100644 --- a/arch/arm/mach-integrator/hardware.h +++ b/arch/arm/mach-integrator/hardware.h @@ -16,12 +16,7 @@ #define IO_START INTEGRATOR_HDR_BASE // PA of IO /* macro to get at IO space when running virtually */ -#ifdef CONFIG_MMU #define IO_ADDRESS(x) (((x) & 0x000fffff) | (((x) >> 4) & 0x0ff00000) | IO_BASE) -#else -#define IO_ADDRESS(x) (x) -#endif - #define __io_address(n) ((void __iomem *)IO_ADDRESS(n)) /* |