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authorGreg Ungerer <gerg@uclinux.org>2011-10-14 14:43:30 +1000
committerGreg Ungerer <gerg@uclinux.org>2011-12-30 10:20:21 +1000
commite08d703cc2ab6e47dbd10a74eb029f7dfa93d71d (patch)
treef81a41ca2a92ed39a723b024b984d220373e6e01 /arch/m68k/lib
parent2c9b82adb5ea65745d5d73d97bb0e1cc16cba4a0 (diff)
downloadop-kernel-dev-e08d703cc2ab6e47dbd10a74eb029f7dfa93d71d.zip
op-kernel-dev-e08d703cc2ab6e47dbd10a74eb029f7dfa93d71d.tar.gz
m68k: modify user space access functions to support ColdFire CPUs
Modify the user space access functions to support the ColdFire V4e cores running with MMU enabled. The ColdFire processors do not support the "moves" instruction used by the traditional 680x0 processors for moving data into and out of another address space. They only support the notion of a single address space, and you use the usual "move" instruction to access that. Create a new config symbol (CONFIG_CPU_HAS_ADDRESS_SPACES) to mark the CPU types that support separate address spaces, and thus also support the sfc/dfc registers and the "moves" instruction that go along with that. The code is almost identical for user space access, so lets just use a define to choose either the "move" or "moves" in the assembler code. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Matt Waddel <mwaddel@yahoo.com> Acked-by: Kurt Mahan <kmahan@xmission.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/lib')
-rw-r--r--arch/m68k/lib/uaccess.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/arch/m68k/lib/uaccess.c b/arch/m68k/lib/uaccess.c
index 13854ed..5664386 100644
--- a/arch/m68k/lib/uaccess.c
+++ b/arch/m68k/lib/uaccess.c
@@ -15,17 +15,17 @@ unsigned long __generic_copy_from_user(void *to, const void __user *from,
asm volatile ("\n"
" tst.l %0\n"
" jeq 2f\n"
- "1: moves.l (%1)+,%3\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"
+ "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"
+ "5: "MOVES".b (%1)+,%3\n"
" move.b %3,(%2)+\n"
"6:\n"
" .section .fixup,\"ax\"\n"
@@ -68,17 +68,17 @@ unsigned long __generic_copy_to_user(void __user *to, const void *from,
" tst.l %0\n"
" jeq 4f\n"
"1: move.l (%1)+,%3\n"
- "2: moves.l %3,(%2)+\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"
+ "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"
+ "7: "MOVES".b %3,(%2)+\n"
"8:\n"
" .section .fixup,\"ax\"\n"
" .even\n"
@@ -115,7 +115,7 @@ long strncpy_from_user(char *dst, const char __user *src, long count)
return count;
asm volatile ("\n"
- "1: moves.b (%2)+,%4\n"
+ "1: "MOVES".b (%2)+,%4\n"
" move.b %4,(%1)+\n"
" jeq 2f\n"
" subq.l #1,%3\n"
@@ -152,7 +152,7 @@ long strnlen_user(const char __user *src, long n)
asm volatile ("\n"
"1: subq.l #1,%1\n"
" jmi 3f\n"
- "2: moves.b (%0)+,%2\n"
+ "2: "MOVES".b (%0)+,%2\n"
" tst.b %2\n"
" jne 1b\n"
" jra 4f\n"
@@ -188,15 +188,15 @@ unsigned long __clear_user(void __user *to, unsigned long n)
asm volatile ("\n"
" tst.l %0\n"
" jeq 3f\n"
- "1: moves.l %2,(%1)+\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"
+ "4: "MOVES".w %2,(%1)+\n"
"5: btst #0,%4\n"
" jeq 7f\n"
- "6: moves.b %2,(%1)\n"
+ "6: "MOVES".b %2,(%1)\n"
"7:\n"
" .section .fixup,\"ax\"\n"
" .even\n"
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