mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-29 15:14:18 +08:00
76222808fc
We originally added asm-prototypes.h in commit42f5b4cacd("powerpc: Introduce asm-prototypes.h"). It's purpose was for prototypes of C functions that are only called from asm, in order to fix sparse warnings about missing prototypes. A few months later Nick added a different use case in commit4efca4ed05("kbuild: modversions for EXPORT_SYMBOL() for asm") for C prototypes for exported asm functions. This is basically the inverse of our original usage. Since then we've added various prototypes to asm-prototypes.h for both reasons, meaning we now need to unstitch it all. Dispatch prototypes of C functions into relevant headers and keep only the prototypes for functions defined in assembly. For the time being, leave prom_init() there because moving it into asm/prom.h or asm/setup.h conflicts with drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowrom.o This will be fixed later by untaggling asm/pci.h and asm/prom.h or by renaming the function in shadowrom.c Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/62d46904eca74042097acf4cb12c175e3067f3d1.1646413435.git.christophe.leroy@csgroup.eu
122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Implementation of various system calls for Linux/PowerPC
|
|
*
|
|
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
|
|
*
|
|
* Derived from "arch/i386/kernel/sys_i386.c"
|
|
* Adapted from the i386 version by Gary Thomas
|
|
* Modified by Cort Dougan (cort@cs.nmt.edu)
|
|
* and Paul Mackerras (paulus@cs.anu.edu.au).
|
|
*
|
|
* This file contains various random system calls that
|
|
* have a non-standard calling sequence on the Linux/PPC
|
|
* platform.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/sys.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/file.h>
|
|
#include <linux/personality.h>
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/syscalls.h>
|
|
#include <asm/time.h>
|
|
#include <asm/unistd.h>
|
|
|
|
static inline long do_mmap2(unsigned long addr, size_t len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long off, int shift)
|
|
{
|
|
if (!arch_validate_prot(prot, addr))
|
|
return -EINVAL;
|
|
|
|
if (!IS_ALIGNED(off, 1 << shift))
|
|
return -EINVAL;
|
|
|
|
return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> shift);
|
|
}
|
|
|
|
SYSCALL_DEFINE6(mmap2, unsigned long, addr, size_t, len,
|
|
unsigned long, prot, unsigned long, flags,
|
|
unsigned long, fd, unsigned long, pgoff)
|
|
{
|
|
return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
|
|
}
|
|
|
|
SYSCALL_DEFINE6(mmap, unsigned long, addr, size_t, len,
|
|
unsigned long, prot, unsigned long, flags,
|
|
unsigned long, fd, off_t, offset)
|
|
{
|
|
return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
|
|
}
|
|
|
|
#ifdef CONFIG_PPC32
|
|
/*
|
|
* Due to some executables calling the wrong select we sometimes
|
|
* get wrong args. This determines how the args are being passed
|
|
* (a single ptr to them all args passed) then calls
|
|
* sys_select() with the appropriate args. -- Cort
|
|
*/
|
|
int
|
|
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct __kernel_old_timeval __user *tvp)
|
|
{
|
|
if ( (unsigned long)n >= 4096 )
|
|
return sys_old_select((void __user *)n);
|
|
|
|
return sys_select(n, inp, outp, exp, tvp);
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC64
|
|
long ppc64_personality(unsigned long personality)
|
|
{
|
|
long ret;
|
|
|
|
if (personality(current->personality) == PER_LINUX32
|
|
&& personality(personality) == PER_LINUX)
|
|
personality = (personality & ~PER_MASK) | PER_LINUX32;
|
|
ret = sys_personality(personality);
|
|
if (personality(ret) == PER_LINUX32)
|
|
ret = (ret & ~PER_MASK) | PER_LINUX;
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
|
|
u32 len_high, u32 len_low)
|
|
{
|
|
return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low,
|
|
(u64)len_high << 32 | len_low, advice);
|
|
}
|
|
|
|
SYSCALL_DEFINE0(switch_endian)
|
|
{
|
|
struct thread_info *ti;
|
|
|
|
regs_set_return_msr(current->thread.regs,
|
|
current->thread.regs->msr ^ MSR_LE);
|
|
|
|
/*
|
|
* Set TIF_RESTOREALL so that r3 isn't clobbered on return to
|
|
* userspace. That also has the effect of restoring the non-volatile
|
|
* GPRs, so we saved them on the way in here.
|
|
*/
|
|
ti = current_thread_info();
|
|
ti->flags |= _TIF_RESTOREALL;
|
|
|
|
return 0;
|
|
}
|