text: /*
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   *
   * Copyright (C) 2001 - 2007 Tensilica Inc.
   * Copyright (C) 2018 Cadence Design Systems Inc.
   */
  
  #ifndef _ASM_SYSCALL_H
  #define _ASM_SYSCALL_H
  
  #include <linux/err.h>
  #include <asm/ptrace.h>
  #include <uapi/linux/audit.h>
  
  static inline int syscall_get_arch(struct task_struct *task)
  {
  	return AUDIT_ARCH_XTENSA;
  }
  
  typedef void (*syscall_t)(void);
  extern syscall_t sys_call_table[];
  
  static inline long syscall_get_nr(struct task_struct *task,
  				  struct pt_regs *regs)
  {
  	return regs->syscall;
  }
  
  static inline void syscall_rollback(struct task_struct *task,
  				    struct pt_regs *regs)
  {
  	/* Do nothing. */
  }
  
  static inline long syscall_get_error(struct task_struct *task,
  				     struct pt_regs *regs)
  {
  	/* 0 if syscall succeeded, otherwise -Errorcode */
  	return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
  }
  
  static inline long syscall_get_return_value(struct task_struct *task,
  					    struct pt_regs *regs)
  {
  	return regs->areg[2];
  }
  
  static inline void syscall_set_return_value(struct task_struct *task,
  					    struct pt_regs *regs,
  					    int error, long val)
  {
  	regs->areg[0] = (long) error ? error : val;
  }
  
  #define SYSCALL_MAX_ARGS 6
  #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
  
  static inline void syscall_get_arguments(struct task_struct *task,
  					 struct pt_regs *regs,
  					 unsigned long *args)
  {
  	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
  	unsigned int i;
  
  	for (i = 0; i < 6; ++i)
  		args[i] = regs->areg[reg[i]];
  }
  
  static inline void syscall_set_arguments(struct task_struct *task,
  					 struct pt_regs *regs,
  					 const unsigned long *args)
  {
  	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
  	unsigned int i;
  
  	for (i = 0; i < 6; ++i)
  		regs->areg[reg[i]] = args[i];
  }
  
  asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
  asmlinkage long xtensa_shmat(int, char __user *, int);
  asmlinkage long xtensa_fadvise64_64(int, int,
  				    unsigned long long, unsigned long long);
  
  #endif
  