// SPDX-License-Identifier: GPL-2.0/* * linux/arch/sh/kernel/sys_sh.c * * This file contains various random system calls that * have a non-standard calling sequence on the Linux/SuperH * platform. * * Taken from i386 version. */#include <linux/errno.h>#include <linux/sched.h>#include <linux/mm.h>#include <linux/smp.h>#include <linux/sem.h>#include <linux/msg.h>#include <linux/shm.h>#include <linux/stat.h>#include <linux/syscalls.h>#include <linux/mman.h>#include <linux/file.h>#include <linux/utsname.h>#include <linux/module.h>#include <linux/fs.h>#include <linux/ipc.h>#include <asm/syscalls.h>#include <linux/uaccess.h>#include <asm/unistd.h>#include <asm/cacheflush.h>#include <asm/cachectl.h> asmlinkage int old_mmap(unsigned long addr, unsigned long len,	unsigned long prot, unsigned long flags,	int fd, unsigned long off){	if (off & ~PAGE_MASK)		return -EINVAL;	return ksys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT);} asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,	unsigned long prot, unsigned long flags,	unsigned long fd, unsigned long pgoff){	/*	 * The shift for mmap2 is constant, regardless of PAGE_SIZE	 * setting.	 */	if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))		return -EINVAL; 	pgoff >>= PAGE_SHIFT - 12; 	return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);} /* sys_cacheflush -- flush (part of) the processor cache.  */asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op){	struct vm_area_struct *vma; 	if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))		return -EINVAL; 	/*	 * Verify that the specified address region actually belongs	 * to this process.	 */	if (addr + len < addr)		return -EFAULT; 	mmap_read_lock(current->mm);	vma = find_vma (current->mm, addr);	if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {		mmap_read_unlock(current->mm);		return -EFAULT;	} 	switch (op & CACHEFLUSH_D_PURGE) {		case CACHEFLUSH_D_INVAL:			__flush_invalidate_region((void *)addr, len);			break;		case CACHEFLUSH_D_WB:			__flush_wback_region((void *)addr, len);			break;		case CACHEFLUSH_D_PURGE:			__flush_purge_region((void *)addr, len);			break;	} 	if (op & CACHEFLUSH_I)		flush_icache_range(addr, addr+len); 	mmap_read_unlock(current->mm);	return 0;}