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27a84793e4
Patching UP/SMP alternatives inside inline assembly blocks is useful outside of the spinlock implementation, where it is used for sev and wfe. This patch lifts the macro into processor.h and gives it a scarier name to (a) avoid conflicts in the global namespace and (b) to try and deter its usage unless you "know what you're doing". The W macro for generating wide instructions when targetting Thumb-2 is also made available under the name WASM, to reduce the potential for conflicts with other headers. Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
135 lines
2.7 KiB
C
135 lines
2.7 KiB
C
/*
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* include/asm-arm/unified.h - Unified Assembler Syntax helper macros
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*
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* Copyright (C) 2008 ARM Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_UNIFIED_H
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#define __ASM_UNIFIED_H
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#if defined(__ASSEMBLY__) && defined(CONFIG_ARM_ASM_UNIFIED)
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.syntax unified
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#endif
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#ifdef CONFIG_THUMB2_KERNEL
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#if __GNUC__ < 4
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#error Thumb-2 kernel requires gcc >= 4
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#endif
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/* The CPSR bit describing the instruction set (Thumb) */
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#define PSR_ISETSTATE PSR_T_BIT
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#define ARM(x...)
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#define THUMB(x...) x
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#ifdef __ASSEMBLY__
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#define W(instr) instr.w
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#define BSYM(sym) sym + 1
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#else
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#define WASM(instr) #instr ".w"
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#endif
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#else /* !CONFIG_THUMB2_KERNEL */
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/* The CPSR bit describing the instruction set (ARM) */
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#define PSR_ISETSTATE 0
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#define ARM(x...) x
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#define THUMB(x...)
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#ifdef __ASSEMBLY__
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#define W(instr) instr
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#define BSYM(sym) sym
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#else
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#define WASM(instr) #instr
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#endif
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#endif /* CONFIG_THUMB2_KERNEL */
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#ifndef CONFIG_ARM_ASM_UNIFIED
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/*
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* If the unified assembly syntax isn't used (in ARM mode), these
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* macros expand to an empty string
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*/
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#ifdef __ASSEMBLY__
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.macro it, cond
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.endm
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.macro itt, cond
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.endm
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.macro ite, cond
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.endm
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.macro ittt, cond
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.endm
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.macro itte, cond
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.endm
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.macro itet, cond
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.endm
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.macro itee, cond
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.endm
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.macro itttt, cond
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.endm
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.macro ittte, cond
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.endm
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.macro ittet, cond
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.endm
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.macro ittee, cond
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.endm
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.macro itett, cond
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.endm
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.macro itete, cond
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.endm
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.macro iteet, cond
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.endm
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.macro iteee, cond
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.endm
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#else /* !__ASSEMBLY__ */
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__asm__(
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" .macro it, cond\n"
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" .endm\n"
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" .macro itt, cond\n"
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" .endm\n"
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" .macro ite, cond\n"
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" .endm\n"
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" .macro ittt, cond\n"
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" .endm\n"
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" .macro itte, cond\n"
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" .endm\n"
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" .macro itet, cond\n"
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" .endm\n"
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" .macro itee, cond\n"
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" .endm\n"
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" .macro itttt, cond\n"
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" .endm\n"
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" .macro ittte, cond\n"
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" .endm\n"
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" .macro ittet, cond\n"
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" .endm\n"
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" .macro ittee, cond\n"
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" .endm\n"
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" .macro itett, cond\n"
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" .endm\n"
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" .macro itete, cond\n"
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" .endm\n"
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" .macro iteet, cond\n"
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" .endm\n"
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" .macro iteee, cond\n"
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" .endm\n");
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_ARM_ASM_UNIFIED */
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#endif /* !__ASM_UNIFIED_H */
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