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12c3dca25d
The MaverickCrunch support for ep93xx never made it into glibc and was removed from gcc in its 4.8 release in 2012. It is now one of the last parts of arch/arm/ that fails to build with the clang integrated assembler, which is unlikely to ever want to support it. The two alternatives are to force the use of binutils/gas when building the crunch support, or to remove it entirely. According to Hartley Sweeten: "Martin Guy did a lot of work trying to get the maverick crunch working but I was never able to successfully use it for anything. It "kind" of works but depending on the EP93xx silicon revision there are still a number of hardware bugs that either give imprecise or garbage results. I have no problem with removing the kernel support for the maverick crunch." Unless someone else comes up with a good reason to keep it around, remove it now. This touches mostly the ep93xx platform, but removes a bit of code from ARM common ptrace and signal frame handling as well. If there are remaining users of MaverickCrunch, they can use LTS kernels for at least another five years before kernel support ends. Link: https://lore.kernel.org/linux-arm-kernel/20210802141245.1146772-1-arnd@kernel.org/ Link: https://lore.kernel.org/linux-arm-kernel/20210226164345.3889993-1-arnd@kernel.org/ Link: https://github.com/ClangBuiltLinux/linux/issues/1272 Link: https://gcc.gnu.org/legacy-ml/gcc/2008-03/msg01063.html Cc: "Martin Guy" <martinwguy@martinwguy@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/arch/arm/mach-ep93xx/micro9.c
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*
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* Copyright (C) 2006 Contec Steuerungstechnik & Automation GmbH
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* Manfred Gruber <m.gruber@tirol.com>
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* Copyright (C) 2009 Contec Steuerungstechnik & Automation GmbH
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* Hubert Feurstein <hubert.feurstein@contec.at>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include "hardware.h"
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include "soc.h"
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/*************************************************************************
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* Micro9 NOR Flash
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*
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* Micro9-High has up to 64MB of 32-bit flash on CS1
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* Micro9-Mid has up to 64MB of either 32-bit or 16-bit flash on CS1
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* Micro9-Lite uses a separate MTD map driver for flash support
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* Micro9-Slim has up to 64MB of either 32-bit or 16-bit flash on CS1
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*************************************************************************/
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static unsigned int __init micro9_detect_bootwidth(void)
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{
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u32 v;
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/* Detect the bus width of the external flash memory */
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v = __raw_readl(EP93XX_SYSCON_SYSCFG);
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if (v & EP93XX_SYSCON_SYSCFG_LCSN7)
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return 4; /* 32-bit */
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else
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return 2; /* 16-bit */
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}
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static void __init micro9_register_flash(void)
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{
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unsigned int width;
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if (machine_is_micro9())
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width = 4;
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else if (machine_is_micro9m() || machine_is_micro9s())
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width = micro9_detect_bootwidth();
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else
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width = 0;
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if (width)
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ep93xx_register_flash(width, EP93XX_CS1_PHYS_BASE, SZ_64M);
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}
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/*************************************************************************
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* Micro9 Ethernet
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*************************************************************************/
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static struct ep93xx_eth_data __initdata micro9_eth_data = {
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.phy_id = 0x1f,
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};
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static void __init micro9_init_machine(void)
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{
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ep93xx_init_devices();
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ep93xx_register_eth(µ9_eth_data, 1);
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micro9_register_flash();
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}
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#ifdef CONFIG_MACH_MICRO9H
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MACHINE_START(MICRO9, "Contec Micro9-High")
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/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
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.atag_offset = 0x100,
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.map_io = ep93xx_map_io,
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.init_irq = ep93xx_init_irq,
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.init_time = ep93xx_timer_init,
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.init_machine = micro9_init_machine,
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.restart = ep93xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_MICRO9M
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MACHINE_START(MICRO9M, "Contec Micro9-Mid")
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/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
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.atag_offset = 0x100,
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.map_io = ep93xx_map_io,
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.init_irq = ep93xx_init_irq,
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.init_time = ep93xx_timer_init,
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.init_machine = micro9_init_machine,
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.restart = ep93xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_MICRO9L
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MACHINE_START(MICRO9L, "Contec Micro9-Lite")
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/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
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.atag_offset = 0x100,
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.map_io = ep93xx_map_io,
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.init_irq = ep93xx_init_irq,
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.init_time = ep93xx_timer_init,
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.init_machine = micro9_init_machine,
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.restart = ep93xx_restart,
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MACHINE_END
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#endif
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#ifdef CONFIG_MACH_MICRO9S
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MACHINE_START(MICRO9S, "Contec Micro9-Slim")
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/* Maintainer: Hubert Feurstein <hubert.feurstein@contec.at> */
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.atag_offset = 0x100,
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.map_io = ep93xx_map_io,
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.init_irq = ep93xx_init_irq,
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.init_time = ep93xx_timer_init,
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.init_machine = micro9_init_machine,
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.restart = ep93xx_restart,
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MACHINE_END
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#endif
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