[PATCH 2/6] powerpc: Use lwarx/ldarx hint in bit locks
Anton Blanchard
anton at samba.org
Wed Feb 10 22:02:36 EST 2010
This patch implements the lwarx/ldarx hint bit for bit locks.
Signed-off-by: Anton Blanchard <anton at samba.org>
---
Index: powerpc.git/arch/powerpc/include/asm/asm-compat.h
===================================================================
--- powerpc.git.orig/arch/powerpc/include/asm/asm-compat.h 2010-02-10 17:16:07.003090026 +1100
+++ powerpc.git/arch/powerpc/include/asm/asm-compat.h 2010-02-10 17:16:39.144321846 +1100
@@ -2,6 +2,7 @@
#define _ASM_POWERPC_ASM_COMPAT_H
#include <asm/types.h>
+#include <asm/ppc-opcode.h>
#ifdef __ASSEMBLY__
# define stringify_in_c(...) __VA_ARGS__
@@ -24,7 +25,7 @@
#define PPC_LONG stringify_in_c(.llong)
#define PPC_LONG_ALIGN stringify_in_c(.balign 8)
#define PPC_TLNEI stringify_in_c(tdnei)
-#define PPC_LLARX stringify_in_c(ldarx)
+#define PPC_LLARX(t, a, b, eh) PPC_LDARX(t, a, b, eh)
#define PPC_STLCX stringify_in_c(stdcx.)
#define PPC_CNTLZL stringify_in_c(cntlzd)
@@ -46,7 +47,7 @@
#define PPC_LONG stringify_in_c(.long)
#define PPC_LONG_ALIGN stringify_in_c(.balign 4)
#define PPC_TLNEI stringify_in_c(twnei)
-#define PPC_LLARX stringify_in_c(lwarx)
+#define PPC_LLARX(t, a, b, eh) PPC_LWARX(t, a, b, eh)
#define PPC_STLCX stringify_in_c(stwcx.)
#define PPC_CNTLZL stringify_in_c(cntlzw)
#define PPC_MTOCRF stringify_in_c(mtcrf)
Index: powerpc.git/arch/powerpc/include/asm/bitops.h
===================================================================
--- powerpc.git.orig/arch/powerpc/include/asm/bitops.h 2010-02-10 17:16:07.013074408 +1100
+++ powerpc.git/arch/powerpc/include/asm/bitops.h 2010-02-10 17:16:14.253072938 +1100
@@ -65,7 +65,7 @@ static __inline__ void fn(unsigned long
unsigned long *p = (unsigned long *)_p; \
__asm__ __volatile__ ( \
prefix \
-"1:" PPC_LLARX "%0,0,%3\n" \
+"1:" PPC_LLARX(%0,0,%3,0) "\n" \
stringify_in_c(op) "%0,%0,%2\n" \
PPC405_ERR77(0,%3) \
PPC_STLCX "%0,0,%3\n" \
@@ -103,31 +103,31 @@ static __inline__ void change_bit(int nr
/* Like DEFINE_BITOP(), with changes to the arguments to 'op' and the output
* operands. */
-#define DEFINE_TESTOP(fn, op, prefix, postfix) \
-static __inline__ unsigned long fn( \
- unsigned long mask, \
- volatile unsigned long *_p) \
-{ \
- unsigned long old, t; \
- unsigned long *p = (unsigned long *)_p; \
- __asm__ __volatile__ ( \
- prefix \
-"1:" PPC_LLARX "%0,0,%3\n" \
- stringify_in_c(op) "%1,%0,%2\n" \
- PPC405_ERR77(0,%3) \
- PPC_STLCX "%1,0,%3\n" \
- "bne- 1b\n" \
- postfix \
- : "=&r" (old), "=&r" (t) \
- : "r" (mask), "r" (p) \
- : "cc", "memory"); \
- return (old & mask); \
-}
-
-DEFINE_TESTOP(test_and_set_bits, or, LWSYNC_ON_SMP, ISYNC_ON_SMP)
-DEFINE_TESTOP(test_and_set_bits_lock, or, "", ISYNC_ON_SMP)
-DEFINE_TESTOP(test_and_clear_bits, andc, LWSYNC_ON_SMP, ISYNC_ON_SMP)
-DEFINE_TESTOP(test_and_change_bits, xor, LWSYNC_ON_SMP, ISYNC_ON_SMP)
+#define DEFINE_TESTOP(fn, op, prefix, postfix, eh) \
+static __inline__ unsigned long fn( \
+ unsigned long mask, \
+ volatile unsigned long *_p) \
+{ \
+ unsigned long old, t; \
+ unsigned long *p = (unsigned long *)_p; \
+ __asm__ __volatile__ ( \
+ prefix \
+"1:" PPC_LLARX(%0,0,%3,eh) "\n" \
+ stringify_in_c(op) "%1,%0,%2\n" \
+ PPC405_ERR77(0,%3) \
+ PPC_STLCX "%1,0,%3\n" \
+ "bne- 1b\n" \
+ postfix \
+ : "=&r" (old), "=&r" (t) \
+ : "r" (mask), "r" (p) \
+ : "cc", "memory"); \
+ return (old & mask); \
+}
+
+DEFINE_TESTOP(test_and_set_bits, or, LWSYNC_ON_SMP, ISYNC_ON_SMP, 0)
+DEFINE_TESTOP(test_and_set_bits_lock, or, "", ISYNC_ON_SMP, 1)
+DEFINE_TESTOP(test_and_clear_bits, andc, LWSYNC_ON_SMP, ISYNC_ON_SMP, 0)
+DEFINE_TESTOP(test_and_change_bits, xor, LWSYNC_ON_SMP, ISYNC_ON_SMP, 0)
static __inline__ int test_and_set_bit(unsigned long nr,
volatile unsigned long *addr)
Index: powerpc.git/arch/powerpc/include/asm/local.h
===================================================================
--- powerpc.git.orig/arch/powerpc/include/asm/local.h 2010-02-10 17:16:07.023072625 +1100
+++ powerpc.git/arch/powerpc/include/asm/local.h 2010-02-10 17:16:14.253072938 +1100
@@ -24,7 +24,7 @@ static __inline__ long local_add_return(
long t;
__asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%2 # local_add_return\n\
+"1:" PPC_LLARX(%0,0,%2,0) " # local_add_return\n\
add %0,%1,%0\n"
PPC405_ERR77(0,%2)
PPC_STLCX "%0,0,%2 \n\
@@ -43,7 +43,7 @@ static __inline__ long local_sub_return(
long t;
__asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%2 # local_sub_return\n\
+"1:" PPC_LLARX(%0,0,%2,0) " # local_sub_return\n\
subf %0,%1,%0\n"
PPC405_ERR77(0,%2)
PPC_STLCX "%0,0,%2 \n\
@@ -60,7 +60,7 @@ static __inline__ long local_inc_return(
long t;
__asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%1 # local_inc_return\n\
+"1:" PPC_LLARX(%0,0,%1,0) " # local_inc_return\n\
addic %0,%0,1\n"
PPC405_ERR77(0,%1)
PPC_STLCX "%0,0,%1 \n\
@@ -87,7 +87,7 @@ static __inline__ long local_dec_return(
long t;
__asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%1 # local_dec_return\n\
+"1:" PPC_LLARX(%0,0,%1,0) " # local_dec_return\n\
addic %0,%0,-1\n"
PPC405_ERR77(0,%1)
PPC_STLCX "%0,0,%1\n\
@@ -117,7 +117,7 @@ static __inline__ int local_add_unless(l
long t;
__asm__ __volatile__ (
-"1:" PPC_LLARX "%0,0,%1 # local_add_unless\n\
+"1:" PPC_LLARX(%0,0,%1,0) " # local_add_unless\n\
cmpw 0,%0,%3 \n\
beq- 2f \n\
add %0,%2,%0 \n"
@@ -147,7 +147,7 @@ static __inline__ long local_dec_if_posi
long t;
__asm__ __volatile__(
-"1:" PPC_LLARX "%0,0,%1 # local_dec_if_positive\n\
+"1:" PPC_LLARX(%0,0,%1,0) " # local_dec_if_positive\n\
cmpwi %0,1\n\
addi %0,%0,-1\n\
blt- 2f\n"
Index: powerpc.git/arch/powerpc/include/asm/ppc-opcode.h
===================================================================
--- powerpc.git.orig/arch/powerpc/include/asm/ppc-opcode.h 2010-02-10 17:16:07.013074408 +1100
+++ powerpc.git/arch/powerpc/include/asm/ppc-opcode.h 2010-02-10 17:16:14.263072384 +1100
@@ -22,6 +22,7 @@
#define PPC_INST_DCBZL 0x7c2007ec
#define PPC_INST_ISEL 0x7c00001e
#define PPC_INST_ISEL_MASK 0xfc00003e
+#define PPC_INST_LDARX 0x7c0000a8
#define PPC_INST_LSWI 0x7c0004aa
#define PPC_INST_LSWX 0x7c00042a
#define PPC_INST_LWARX 0x7c000029
@@ -75,6 +76,9 @@
__PPC_RA(a) | __PPC_RB(b))
#define PPC_DCBZL(a, b) stringify_in_c(.long PPC_INST_DCBZL | \
__PPC_RA(a) | __PPC_RB(b))
+#define PPC_LDARX(t, a, b, eh) stringify_in_c(.long PPC_INST_LDARX | \
+ __PPC_RT(t) | __PPC_RA(a) | \
+ __PPC_RB(b) | __PPC_EH(eh))
#define PPC_LWARX(t, a, b, eh) stringify_in_c(.long PPC_INST_LWARX | \
__PPC_RT(t) | __PPC_RA(a) | \
__PPC_RB(b) | __PPC_EH(eh))
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