97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
// 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;
|
|
}
|