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MIPS: futex: Add EVA support for futex operations

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Use LLE/SCE instructions for performing an address translation for
userspace when EVA is enabled.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
Markos Chandras 2013-12-04 09:58:36 +00:00 committed by Ralf Baechle
parent 9324494595
commit a6813fe5c2
1 changed files with 5 additions and 4 deletions
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9
arch/mips/include/asm/futex.h
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@ -12,6 +12,7 @@
#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/asm-eva.h>
#include <asm/barrier.h>
#include <asm/errno.h>
#include <asm/war.h>
@ -49,11 +50,11 @@
" .set push \n" \
" .set noat \n" \
" .set mips3 \n" \
"1: ll %1, %4 # __futex_atomic_op \n" \
"1: "user_ll("%1", "%4")" # __futex_atomic_op\n" \
" .set mips0 \n" \
" " insn " \n" \
" .set mips3 \n" \
"2: sc $1, %2 \n" \
"2: "user_sc("$1", "%2")" \n" \
" beqz $1, 1b \n" \
__WEAK_LLSC_MB \
"3: \n" \
@ -174,12 +175,12 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
" .set push \n"
" .set noat \n"
" .set mips3 \n"
"1: ll %1, %3 \n"
"1: "user_ll("%1", "%3")" \n"
" bne %1, %z4, 3f \n"
" .set mips0 \n"
" move $1, %z5 \n"
" .set mips3 \n"
"2: sc $1, %2 \n"
"2: "user_sc("$1", "%2")" \n"
" beqz $1, 1b \n"
__WEAK_LLSC_MB
"3: \n"