/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) */ #ifndef __ASM_ARC_ENTRY_H#define __ASM_ARC_ENTRY_H #include <asm/unistd.h>		/* For NR_syscalls definition */#include <asm/arcregs.h>#include <asm/ptrace.h>#include <asm/processor.h>	/* For VMALLOC_START */#include <asm/mmu.h> #ifdef __ASSEMBLER__ #ifdef CONFIG_ISA_ARCOMPACT#include <asm/entry-compact.h>	/* ISA specific bits */#else#include <asm/entry-arcv2.h>#endif /* * save user mode callee regs as struct callee_regs *  - needed by fork/do_signal/unaligned-access-emulation. */.macro SAVE_CALLEE_SAVED_USER	SAVE_ABI_CALLEE_REGS.endm /* * restore user mode callee regs as struct callee_regs *  - could have been changed by ptrace tracer or unaligned-access fixup */.macro RESTORE_CALLEE_SAVED_USER	RESTORE_ABI_CALLEE_REGS.endm /* * save/restore kernel mode callee regs at the time of context switch */.macro SAVE_CALLEE_SAVED_KERNEL	SAVE_ABI_CALLEE_REGS.endm .macro RESTORE_CALLEE_SAVED_KERNEL	RESTORE_ABI_CALLEE_REGS.endm /*-------------------------------------------------------------- * Super FAST Restore callee saved regs by simply re-adjusting SP *-------------------------------------------------------------*/.macro DISCARD_CALLEE_SAVED_USER	add     sp, sp, SZ_CALLEE_REGS.endm /*------------------------------------------------------------- * given a tsk struct, get to the base of its kernel mode stack * tsk->thread_info is really a PAGE, whose bottom hoists stack * which grows upwards towards thread_info *------------------------------------------------------------*/ .macro GET_TSK_STACK_BASE tsk, out 	/* Get task->thread_info (this is essentially start of a PAGE) */	ld  \out, [\tsk, TASK_THREAD_INFO] 	/* Go to end of page where stack begins (grows upwards) */	add2 \out, \out, (THREAD_SIZE)/4 .endm /* * @reg [OUT] thread_info->flags of "current" */.macro GET_CURR_THR_INFO_FLAGS  reg	GET_CURR_THR_INFO_FROM_SP  \reg	ld  \reg, [\reg, THREAD_INFO_FLAGS].endm #ifdef CONFIG_SMP /* * Retrieve the current running task on this CPU *  - loads it from backing _current_task[] (and can't use the *    caching reg for current task */.macro  GET_CURR_TASK_ON_CPU   reg	GET_CPU_ID  \reg	ld.as  \reg, [@_current_task, \reg].endm /*------------------------------------------------- * Save a new task as the "current" task on this CPU * 1. Determine curr CPU id. * 2. Use it to index into _current_task[ ] * * Coded differently than GET_CURR_TASK_ON_CPU (which uses LD.AS) * because ST r0, [r1, offset] can ONLY have s9 @offset * while   LD can take s9 (4 byte insn) or LIMM (8 byte insn) */ .macro  SET_CURR_TASK_ON_CPU    tsk, tmp	GET_CPU_ID  \tmp	add2 \tmp, @_current_task, \tmp	st   \tsk, [\tmp]#ifdef CONFIG_ARC_CURR_IN_REG	mov gp, \tsk#endif .endm  #else   /* Uniprocessor implementation of macros */ .macro  GET_CURR_TASK_ON_CPU    reg	ld  \reg, [@_current_task].endm .macro  SET_CURR_TASK_ON_CPU    tsk, tmp	st  \tsk, [@_current_task]#ifdef CONFIG_ARC_CURR_IN_REG	mov gp, \tsk#endif.endm #endif /* SMP / UNI */ /* * Get the ptr to some field of Current Task at @off in task struct *  - Uses current task cached in reg if enabled */#ifdef CONFIG_ARC_CURR_IN_REG .macro GET_CURR_TASK_FIELD_PTR  off,  reg	add \reg, gp, \off.endm #else .macro GET_CURR_TASK_FIELD_PTR  off,  reg	GET_CURR_TASK_ON_CPU  \reg	add \reg, \reg, \off.endm #endif	/* CONFIG_ARC_CURR_IN_REG */ #else	/* !__ASSEMBLER__ */ extern void do_signal(struct pt_regs *);extern void do_notify_resume(struct pt_regs *);extern int do_privilege_fault(unsigned long, struct pt_regs *);extern int do_extension_fault(unsigned long, struct pt_regs *);extern int insterror_is_error(unsigned long, struct pt_regs *);extern int do_memory_error(unsigned long, struct pt_regs *);extern int trap_is_brkpt(unsigned long, struct pt_regs *);extern int do_misaligned_error(unsigned long, struct pt_regs *);extern int do_trap5_error(unsigned long, struct pt_regs *);extern int do_misaligned_access(unsigned long, struct pt_regs *, struct callee_regs *);extern void do_machine_check_fault(unsigned long, struct pt_regs *);extern void do_non_swi_trap(unsigned long, struct pt_regs *);extern void do_insterror_or_kprobe(unsigned long, struct pt_regs *);extern void do_page_fault(unsigned long, struct pt_regs *); #endif #endif  /* __ASM_ARC_ENTRY_H */