From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/m68k/lib/uaccess.c | 148 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 kernel/arch/m68k/lib/uaccess.c (limited to 'kernel/arch/m68k/lib/uaccess.c') diff --git a/kernel/arch/m68k/lib/uaccess.c b/kernel/arch/m68k/lib/uaccess.c new file mode 100644 index 000000000..35d1442de --- /dev/null +++ b/kernel/arch/m68k/lib/uaccess.c @@ -0,0 +1,148 @@ +/* + * 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. + */ + +#include +#include + +unsigned long __generic_copy_from_user(void *to, const void __user *from, + unsigned long n) +{ + unsigned long tmp, res; + + asm volatile ("\n" + " tst.l %0\n" + " jeq 2f\n" + "1: "MOVES".l (%1)+,%3\n" + " move.l %3,(%2)+\n" + " subq.l #1,%0\n" + " jne 1b\n" + "2: btst #1,%5\n" + " jeq 4f\n" + "3: "MOVES".w (%1)+,%3\n" + " move.w %3,(%2)+\n" + "4: btst #0,%5\n" + " jeq 6f\n" + "5: "MOVES".b (%1)+,%3\n" + " move.b %3,(%2)+\n" + "6:\n" + " .section .fixup,\"ax\"\n" + " .even\n" + "10: move.l %0,%3\n" + "7: clr.l (%2)+\n" + " subq.l #1,%3\n" + " jne 7b\n" + " lsl.l #2,%0\n" + " btst #1,%5\n" + " jeq 8f\n" + "30: clr.w (%2)+\n" + " addq.l #2,%0\n" + "8: btst #0,%5\n" + " jeq 6b\n" + "50: clr.b (%2)+\n" + " addq.l #1,%0\n" + " jra 6b\n" + " .previous\n" + "\n" + " .section __ex_table,\"a\"\n" + " .align 4\n" + " .long 1b,10b\n" + " .long 3b,30b\n" + " .long 5b,50b\n" + " .previous" + : "=d" (res), "+a" (from), "+a" (to), "=&d" (tmp) + : "0" (n / 4), "d" (n & 3)); + + return res; +} +EXPORT_SYMBOL(__generic_copy_from_user); + +unsigned long __generic_copy_to_user(void __user *to, const void *from, + unsigned long n) +{ + unsigned long tmp, res; + + asm volatile ("\n" + " tst.l %0\n" + " jeq 4f\n" + "1: move.l (%1)+,%3\n" + "2: "MOVES".l %3,(%2)+\n" + "3: subq.l #1,%0\n" + " jne 1b\n" + "4: btst #1,%5\n" + " jeq 6f\n" + " move.w (%1)+,%3\n" + "5: "MOVES".w %3,(%2)+\n" + "6: btst #0,%5\n" + " jeq 8f\n" + " move.b (%1)+,%3\n" + "7: "MOVES".b %3,(%2)+\n" + "8:\n" + " .section .fixup,\"ax\"\n" + " .even\n" + "20: lsl.l #2,%0\n" + "50: add.l %5,%0\n" + " jra 8b\n" + " .previous\n" + "\n" + " .section __ex_table,\"a\"\n" + " .align 4\n" + " .long 2b,20b\n" + " .long 3b,20b\n" + " .long 5b,50b\n" + " .long 6b,50b\n" + " .long 7b,50b\n" + " .long 8b,50b\n" + " .previous" + : "=d" (res), "+a" (from), "+a" (to), "=&d" (tmp) + : "0" (n / 4), "d" (n & 3)); + + return res; +} +EXPORT_SYMBOL(__generic_copy_to_user); + +/* + * Zero Userspace + */ + +unsigned long __clear_user(void __user *to, unsigned long n) +{ + unsigned long res; + + asm volatile ("\n" + " tst.l %0\n" + " jeq 3f\n" + "1: "MOVES".l %2,(%1)+\n" + "2: subq.l #1,%0\n" + " jne 1b\n" + "3: btst #1,%4\n" + " jeq 5f\n" + "4: "MOVES".w %2,(%1)+\n" + "5: btst #0,%4\n" + " jeq 7f\n" + "6: "MOVES".b %2,(%1)\n" + "7:\n" + " .section .fixup,\"ax\"\n" + " .even\n" + "10: lsl.l #2,%0\n" + "40: add.l %4,%0\n" + " jra 7b\n" + " .previous\n" + "\n" + " .section __ex_table,\"a\"\n" + " .align 4\n" + " .long 1b,10b\n" + " .long 2b,10b\n" + " .long 4b,40b\n" + " .long 5b,40b\n" + " .long 6b,40b\n" + " .long 7b,40b\n" + " .previous" + : "=d" (res), "+a" (to) + : "d" (0), "0" (n / 4), "d" (n & 3)); + + return res; +} +EXPORT_SYMBOL(__clear_user); -- cgit 1.2.3-korg