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900f492836
CONFIG_DEBUG_KERNEL should not impact code generation. Use the newly defined CONFIG_DEBUG_MISC instead to keep the current code. Link: http://lkml.kernel.org/r/20190413224438.10802-5-okaya@kernel.org Signed-off-by: Sinan Kaya <okaya@kernel.org> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Cc: Chris Zankel <chris@zankel.net> Cc: Anders Roxell <anders.roxell@linaro.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: "David S. Miller" <davem@davemloft.net> Cc: Florian Westphal <fw@strlen.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: James Hogan <jhogan@kernel.org> Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: Paul Burton <paul.burton@mips.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* Xtensa IRQ flags handling functions
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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* Copyright (C) 2015 Cadence Design Systems Inc.
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*/
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#ifndef _XTENSA_IRQFLAGS_H
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#define _XTENSA_IRQFLAGS_H
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#include <linux/stringify.h>
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#include <linux/types.h>
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#include <asm/processor.h>
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static inline unsigned long arch_local_save_flags(void)
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{
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unsigned long flags;
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asm volatile("rsr %0, ps" : "=a" (flags));
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return flags;
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}
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static inline unsigned long arch_local_irq_save(void)
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{
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unsigned long flags;
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#if XTENSA_FAKE_NMI
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#if defined(CONFIG_DEBUG_MISC) && (LOCKLEVEL | TOPLEVEL) >= XCHAL_DEBUGLEVEL
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unsigned long tmp;
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asm volatile("rsr %0, ps\t\n"
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"extui %1, %0, 0, 4\t\n"
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"bgei %1, "__stringify(LOCKLEVEL)", 1f\t\n"
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"rsil %0, "__stringify(LOCKLEVEL)"\n"
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"1:"
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: "=a" (flags), "=a" (tmp) :: "memory");
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#else
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asm volatile("rsr %0, ps\t\n"
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"or %0, %0, %1\t\n"
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"xsr %0, ps\t\n"
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"rsync"
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: "=&a" (flags) : "a" (LOCKLEVEL) : "memory");
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#endif
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#else
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asm volatile("rsil %0, "__stringify(LOCKLEVEL)
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: "=a" (flags) :: "memory");
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#endif
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return flags;
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}
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static inline void arch_local_irq_disable(void)
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{
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arch_local_irq_save();
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}
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static inline void arch_local_irq_enable(void)
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{
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unsigned long flags;
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asm volatile("rsil %0, 0" : "=a" (flags) :: "memory");
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}
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static inline void arch_local_irq_restore(unsigned long flags)
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{
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asm volatile("wsr %0, ps; rsync"
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:: "a" (flags) : "memory");
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}
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static inline bool arch_irqs_disabled_flags(unsigned long flags)
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{
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#if XCHAL_EXCM_LEVEL < LOCKLEVEL || (1 << PS_EXCM_BIT) < LOCKLEVEL
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#error "XCHAL_EXCM_LEVEL and 1<<PS_EXCM_BIT must be no less than LOCKLEVEL"
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#endif
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return (flags & (PS_INTLEVEL_MASK | (1 << PS_EXCM_BIT))) >= LOCKLEVEL;
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}
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static inline bool arch_irqs_disabled(void)
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{
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return arch_irqs_disabled_flags(arch_local_save_flags());
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}
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#endif /* _XTENSA_IRQFLAGS_H */
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