a4184174be
All EV4 machines are already gone, and the remaining EV5 based machines all support the slightly more modern EV56 generation as well. Debian only supports EV56 and later. Drop both of these and build kernels optimized for EV56 and higher when the "generic" options is selected, tuning for an out-of-order EV6 pipeline, same as Debian userspace. Since this was the only supported architecture without 8-bit and 16-bit stores, common kernel code no longer has to worry about aligning struct members, and existing workarounds from the block and tty layers can be removed. The alpha memory management code no longer needs an abstraction for the differences between EV4 and EV5+. Link: https://lists.debian.org/debian-alpha/2023/05/msg00009.html Acked-by: Paul E. McKenney <paulmck@kernel.org> Acked-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
101 lines
3.6 KiB
C
101 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI__ALPHA_COMPILER_H
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#define _UAPI__ALPHA_COMPILER_H
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/*
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* Herein are macros we use when describing various patterns we want to GCC.
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* In all cases we can get better schedules out of the compiler if we hide
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* as little as possible inside inline assembly. However, we want to be
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* able to know what we'll get out before giving up inline assembly. Thus
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* these tests and macros.
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*/
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#if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3
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# define __kernel_insbl(val, shift) __builtin_alpha_insbl(val, shift)
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# define __kernel_inswl(val, shift) __builtin_alpha_inswl(val, shift)
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# define __kernel_insql(val, shift) __builtin_alpha_insql(val, shift)
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# define __kernel_inslh(val, shift) __builtin_alpha_inslh(val, shift)
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# define __kernel_extbl(val, shift) __builtin_alpha_extbl(val, shift)
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# define __kernel_extwl(val, shift) __builtin_alpha_extwl(val, shift)
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# define __kernel_cmpbge(a, b) __builtin_alpha_cmpbge(a, b)
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#else
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# define __kernel_insbl(val, shift) \
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({ unsigned long __kir; \
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__asm__("insbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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# define __kernel_inswl(val, shift) \
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({ unsigned long __kir; \
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__asm__("inswl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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# define __kernel_insql(val, shift) \
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({ unsigned long __kir; \
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__asm__("insql %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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# define __kernel_inslh(val, shift) \
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({ unsigned long __kir; \
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__asm__("inslh %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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# define __kernel_extbl(val, shift) \
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({ unsigned long __kir; \
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__asm__("extbl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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# define __kernel_extwl(val, shift) \
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({ unsigned long __kir; \
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__asm__("extwl %2,%1,%0" : "=r"(__kir) : "rI"(shift), "r"(val)); \
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__kir; })
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# define __kernel_cmpbge(a, b) \
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({ unsigned long __kir; \
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__asm__("cmpbge %r2,%1,%0" : "=r"(__kir) : "rI"(b), "rJ"(a)); \
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__kir; })
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#endif
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#ifdef __alpha_cix__
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# if __GNUC__ == 3 && __GNUC_MINOR__ >= 4 || __GNUC__ > 3
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# define __kernel_cttz(x) __builtin_ctzl(x)
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# define __kernel_ctlz(x) __builtin_clzl(x)
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# define __kernel_ctpop(x) __builtin_popcountl(x)
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# else
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# define __kernel_cttz(x) \
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({ unsigned long __kir; \
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__asm__("cttz %1,%0" : "=r"(__kir) : "r"(x)); \
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__kir; })
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# define __kernel_ctlz(x) \
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({ unsigned long __kir; \
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__asm__("ctlz %1,%0" : "=r"(__kir) : "r"(x)); \
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__kir; })
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# define __kernel_ctpop(x) \
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({ unsigned long __kir; \
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__asm__("ctpop %1,%0" : "=r"(__kir) : "r"(x)); \
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__kir; })
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# endif
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#else
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# define __kernel_cttz(x) \
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({ unsigned long __kir; \
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__asm__(".arch ev67; cttz %1,%0" : "=r"(__kir) : "r"(x)); \
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__kir; })
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# define __kernel_ctlz(x) \
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({ unsigned long __kir; \
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__asm__(".arch ev67; ctlz %1,%0" : "=r"(__kir) : "r"(x)); \
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__kir; })
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# define __kernel_ctpop(x) \
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({ unsigned long __kir; \
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__asm__(".arch ev67; ctpop %1,%0" : "=r"(__kir) : "r"(x)); \
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__kir; })
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#endif
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/*
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* Beginning with EGCS 1.1, GCC defines __alpha_bwx__ when the BWX
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* extension is enabled. Previous versions did not define anything
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* we could test during compilation -- too bad, so sad.
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*/
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#if defined(__alpha_bwx__)
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#define __kernel_ldbu(mem) (mem)
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#define __kernel_ldwu(mem) (mem)
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#define __kernel_stb(val,mem) ((mem) = (val))
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#define __kernel_stw(val,mem) ((mem) = (val))
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#endif
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#endif /* _UAPI__ALPHA_COMPILER_H */
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