/* * Copyright 2010 Tilera Corporation. All Rights Reserved. * *   This program is free software; you can redistribute it and/or *   modify it under the terms of the GNU General Public License *   as published by the Free Software Foundation, version 2. * *   This program is distributed in the hope that it will be useful, but *   WITHOUT ANY WARRANTY; without even the implied warranty of *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or *   NON INFRINGEMENT.  See the GNU General Public License for *   more details. * * This file contains various random system calls that * have a non-standard calling sequence on the Linux/TILE * platform. */ #include <linux/errno.h>#include <linux/sched.h>#include <linux/mm.h>#include <linux/smp.h>#include <linux/syscalls.h>#include <linux/mman.h>#include <linux/file.h>#include <linux/mempolicy.h>#include <linux/binfmts.h>#include <linux/fs.h>#include <linux/compat.h>#include <linux/uaccess.h>#include <linux/signal.h>#include <asm/syscalls.h>#include <asm/pgtable.h>#include <asm/homecache.h>#include <asm/cachectl.h>#include <asm/byteorder.h>#include <arch/chip.h> SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len,		unsigned long, flags){	/* DCACHE is not particularly effective if not bound to one cpu. */	if (flags & DCACHE)		homecache_evict(cpumask_of(raw_smp_processor_id())); 	if (flags & ICACHE)		flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm),			     0, 0, 0, NULL, NULL, 0);	return 0;} /* * Syscalls that pass 64-bit values on 32-bit systems normally * pass them as (low,high) word packed into the immediately adjacent * registers.  If the low word naturally falls on an even register, * our ABI makes it work correctly; if not, we adjust it here. * Handling it here means we don't have to fix uclibc AND glibc AND * any other standard libcs we want to support. */ #if !defined(__tilegx__) || defined(CONFIG_COMPAT) #ifdef __BIG_ENDIAN#define SYSCALL_PAIR(name) u32 name ## _hi, u32 name ## _lo#else#define SYSCALL_PAIR(name) u32 name ## _lo, u32 name ## _hi#endif ssize_t sys32_readahead(int fd, SYSCALL_PAIR(offset), u32 count){	return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count);} int sys32_fadvise64_64(int fd, SYSCALL_PAIR(offset),		       SYSCALL_PAIR(len), int advice){	return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo,				((loff_t)len_hi << 32) | len_lo, advice);} #endif /* 32-bit syscall wrappers */ /* Note: used by the compat code even in 64-bit Linux. */SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,		unsigned long, prot, unsigned long, flags,		unsigned long, fd, unsigned long, off_4k){#define PAGE_ADJUST (PAGE_SHIFT - 12)	if (off_4k & ((1 << PAGE_ADJUST) - 1))		return -EINVAL;	return sys_mmap_pgoff(addr, len, prot, flags, fd,			      off_4k >> PAGE_ADJUST);} #ifdef __tilegx__SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,		unsigned long, prot, unsigned long, flags,		unsigned long, fd, off_t, offset){	if (offset & ((1 << PAGE_SHIFT) - 1))		return -EINVAL;	return sys_mmap_pgoff(addr, len, prot, flags, fd,			      offset >> PAGE_SHIFT);}#endif  /* Provide the actual syscall number to call mapping. */#undef __SYSCALL#define __SYSCALL(nr, call) [nr] = (call), #ifndef __tilegx__/* See comments at the top of the file. */#define sys_fadvise64_64 sys32_fadvise64_64#define sys_readahead sys32_readahead#endif /* Call the assembly trampolines where necessary. */#undef sys_rt_sigreturn#define sys_rt_sigreturn _sys_rt_sigreturn#define sys_clone _sys_clone /* * Note that we can't include <linux/unistd.h> here since the header * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. */void *sys_call_table[__NR_syscalls] = {	[0 ... __NR_syscalls-1] = sys_ni_syscall,#include <asm/unistd.h>};