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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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179e949719
While the GCC and Clang compilers already define __ASSEMBLER__ automatically when compiling assembly code, __ASSEMBLY__ is a macro that only gets defined by the Makefiles in the kernel. This can be very confusing when switching between userspace and kernelspace coding, or when dealing with uapi headers that rather should use __ASSEMBLER__ instead. So let's standardize on the __ASSEMBLER__ macro that is provided by the compilers now. This is a completely mechanical patch (done with a simple "sed -i" statement). Cc: linux-snps-arc@lists.infradead.org Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Vineet Gupta <vgupta@kernel.org>
169 lines
4.4 KiB
C
169 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef __ASM_ARC_ENTRY_H
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#define __ASM_ARC_ENTRY_H
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#include <asm/unistd.h> /* For NR_syscalls definition */
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#include <asm/arcregs.h>
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#include <asm/ptrace.h>
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#include <asm/processor.h> /* For VMALLOC_START */
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#include <asm/mmu.h>
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#ifdef __ASSEMBLER__
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#ifdef CONFIG_ISA_ARCOMPACT
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#include <asm/entry-compact.h> /* ISA specific bits */
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#else
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#include <asm/entry-arcv2.h>
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#endif
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/*
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* save user mode callee regs as struct callee_regs
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* - needed by fork/do_signal/unaligned-access-emulation.
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*/
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.macro SAVE_CALLEE_SAVED_USER
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SAVE_ABI_CALLEE_REGS
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.endm
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/*
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* restore user mode callee regs as struct callee_regs
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* - could have been changed by ptrace tracer or unaligned-access fixup
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*/
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.macro RESTORE_CALLEE_SAVED_USER
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RESTORE_ABI_CALLEE_REGS
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.endm
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/*
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* save/restore kernel mode callee regs at the time of context switch
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*/
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.macro SAVE_CALLEE_SAVED_KERNEL
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SAVE_ABI_CALLEE_REGS
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.endm
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.macro RESTORE_CALLEE_SAVED_KERNEL
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RESTORE_ABI_CALLEE_REGS
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.endm
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/*--------------------------------------------------------------
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* Super FAST Restore callee saved regs by simply re-adjusting SP
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*-------------------------------------------------------------*/
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.macro DISCARD_CALLEE_SAVED_USER
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add sp, sp, SZ_CALLEE_REGS
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.endm
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/*-------------------------------------------------------------
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* given a tsk struct, get to the base of its kernel mode stack
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* tsk->thread_info is really a PAGE, whose bottom hoists stack
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* which grows upwards towards thread_info
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*------------------------------------------------------------*/
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.macro GET_TSK_STACK_BASE tsk, out
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/* Get task->thread_info (this is essentially start of a PAGE) */
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ld \out, [\tsk, TASK_THREAD_INFO]
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/* Go to end of page where stack begins (grows upwards) */
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add2 \out, \out, (THREAD_SIZE)/4
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.endm
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/*
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* @reg [OUT] thread_info->flags of "current"
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*/
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.macro GET_CURR_THR_INFO_FLAGS reg
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GET_CURR_THR_INFO_FROM_SP \reg
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ld \reg, [\reg, THREAD_INFO_FLAGS]
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.endm
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#ifdef CONFIG_SMP
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/*
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* Retrieve the current running task on this CPU
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* - loads it from backing _current_task[] (and can't use the
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* caching reg for current task
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*/
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.macro GET_CURR_TASK_ON_CPU reg
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GET_CPU_ID \reg
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ld.as \reg, [@_current_task, \reg]
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.endm
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/*-------------------------------------------------
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* Save a new task as the "current" task on this CPU
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* 1. Determine curr CPU id.
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* 2. Use it to index into _current_task[ ]
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*
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* Coded differently than GET_CURR_TASK_ON_CPU (which uses LD.AS)
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* because ST r0, [r1, offset] can ONLY have s9 @offset
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* while LD can take s9 (4 byte insn) or LIMM (8 byte insn)
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*/
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.macro SET_CURR_TASK_ON_CPU tsk, tmp
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GET_CPU_ID \tmp
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add2 \tmp, @_current_task, \tmp
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st \tsk, [\tmp]
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#ifdef CONFIG_ARC_CURR_IN_REG
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mov gp, \tsk
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#endif
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.endm
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#else /* Uniprocessor implementation of macros */
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.macro GET_CURR_TASK_ON_CPU reg
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ld \reg, [@_current_task]
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.endm
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.macro SET_CURR_TASK_ON_CPU tsk, tmp
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st \tsk, [@_current_task]
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#ifdef CONFIG_ARC_CURR_IN_REG
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mov gp, \tsk
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#endif
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.endm
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#endif /* SMP / UNI */
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/*
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* Get the ptr to some field of Current Task at @off in task struct
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* - Uses current task cached in reg if enabled
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*/
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#ifdef CONFIG_ARC_CURR_IN_REG
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.macro GET_CURR_TASK_FIELD_PTR off, reg
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add \reg, gp, \off
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.endm
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#else
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.macro GET_CURR_TASK_FIELD_PTR off, reg
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GET_CURR_TASK_ON_CPU \reg
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add \reg, \reg, \off
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.endm
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#endif /* CONFIG_ARC_CURR_IN_REG */
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#else /* !__ASSEMBLER__ */
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extern void do_signal(struct pt_regs *);
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extern void do_notify_resume(struct pt_regs *);
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extern int do_privilege_fault(unsigned long, struct pt_regs *);
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extern int do_extension_fault(unsigned long, struct pt_regs *);
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extern int insterror_is_error(unsigned long, struct pt_regs *);
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extern int do_memory_error(unsigned long, struct pt_regs *);
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extern int trap_is_brkpt(unsigned long, struct pt_regs *);
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extern int do_misaligned_error(unsigned long, struct pt_regs *);
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extern int do_trap5_error(unsigned long, struct pt_regs *);
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extern int do_misaligned_access(unsigned long, struct pt_regs *, struct callee_regs *);
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extern void do_machine_check_fault(unsigned long, struct pt_regs *);
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extern void do_non_swi_trap(unsigned long, struct pt_regs *);
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extern void do_insterror_or_kprobe(unsigned long, struct pt_regs *);
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extern void do_page_fault(unsigned long, struct pt_regs *);
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#endif
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#endif /* __ASM_ARC_ENTRY_H */
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