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authorDavid Gibson <david@gibson.dropbear.id.au>2005-11-10 12:56:55 +1100
committerPaul Mackerras <paulus@samba.org>2005-11-10 13:10:38 +1100
commit3ddfbcf19b15ccd25a0b4b2dc2e38000e08de739 (patch)
treeca77158ab291453ed39e87f2d81beef9e8d1a560 /include/asm-powerpc
parentf6d3577da14e877b79517c883d1139ee6ad7da45 (diff)
downloadlinux-3ddfbcf19b15ccd25a0b4b2dc2e38000e08de739.tar.bz2
[PATCH] powerpc: Consolidate asm compatibility macros
This patch consolidates macros used to generate assembly for compatibility across different CPUs or configs. A new header, asm-powerpc/asm-compat.h contains the main compatibility macros. It uses some preprocessor magic to make the macros suitable both for use in .S files, and in inline asm in .c files. Headers (bitops.h, uaccess.h, atomic.h, bug.h) which had their own such compatibility macros are changed to use asm-compat.h. ppc_asm.h is now for use in .S files *only*, and a #error enforces that. As such, we're a lot more careless about namespace pollution here than in asm-compat.h. While we're at it, this patch adds a call to the PPC405_ERR77 macro in futex.h which should have had it already, but didn't. Built and booted on pSeries, Maple and iSeries (ARCH=powerpc). Built for 32-bit powermac (ARCH=powerpc) and Walnut (ARCH=ppc). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/asm-compat.h55
-rw-r--r--include/asm-powerpc/atomic.h10
-rw-r--r--include/asm-powerpc/bitops.h41
-rw-r--r--include/asm-powerpc/bug.h19
-rw-r--r--include/asm-powerpc/cputable.h2
-rw-r--r--include/asm-powerpc/futex.h5
-rw-r--r--include/asm-powerpc/ppc_asm.h39
-rw-r--r--include/asm-powerpc/system.h1
-rw-r--r--include/asm-powerpc/uaccess.h40
9 files changed, 106 insertions, 106 deletions
diff --git a/include/asm-powerpc/asm-compat.h b/include/asm-powerpc/asm-compat.h
new file mode 100644
index 000000000000..8b133efc9f79
--- /dev/null
+++ b/include/asm-powerpc/asm-compat.h
@@ -0,0 +1,55 @@
+#ifndef _ASM_POWERPC_ASM_COMPAT_H
+#define _ASM_POWERPC_ASM_COMPAT_H
+
+#include <linux/config.h>
+#include <asm/types.h>
+
+#ifdef __ASSEMBLY__
+# define stringify_in_c(...) __VA_ARGS__
+# define ASM_CONST(x) x
+#else
+/* This version of stringify will deal with commas... */
+# define __stringify_in_c(...) #__VA_ARGS__
+# define stringify_in_c(...) __stringify_in_c(__VA_ARGS__) " "
+# define __ASM_CONST(x) x##UL
+# define ASM_CONST(x) __ASM_CONST(x)
+#endif
+
+#ifdef __powerpc64__
+
+/* operations for longs and pointers */
+#define PPC_LL stringify_in_c(ld)
+#define PPC_STL stringify_in_c(std)
+#define PPC_LCMPI stringify_in_c(cmpdi)
+#define PPC_LONG stringify_in_c(.llong)
+#define PPC_TLNEI stringify_in_c(tdnei)
+#define PPC_LLARX stringify_in_c(ldarx)
+#define PPC_STLCX stringify_in_c(stdcx.)
+#define PPC_CNTLZL stringify_in_c(cntlzd)
+
+#else /* 32-bit */
+
+/* operations for longs and pointers */
+#define PPC_LL stringify_in_c(lwz)
+#define PPC_STL stringify_in_c(stw)
+#define PPC_LCMPI stringify_in_c(cmpwi)
+#define PPC_LONG stringify_in_c(.long)
+#define PPC_TLNEI stringify_in_c(twnei)
+#define PPC_LLARX stringify_in_c(lwarx)
+#define PPC_STLCX stringify_in_c(stwcx.)
+#define PPC_CNTLZL stringify_in_c(cntlzw)
+
+#endif
+
+#ifdef CONFIG_IBM405_ERR77
+/* Erratum #77 on the 405 means we need a sync or dcbt before every
+ * stwcx. The old ATOMIC_SYNC_FIX covered some but not all of this.
+ */
+#define PPC405_ERR77(ra,rb) stringify_in_c(dcbt ra, rb;)
+#define PPC405_ERR77_SYNC stringify_in_c(sync;)
+#else
+#define PPC405_ERR77(ra,rb)
+#define PPC405_ERR77_SYNC
+#endif
+
+#endif /* _ASM_POWERPC_ASM_COMPAT_H */
diff --git a/include/asm-powerpc/atomic.h b/include/asm-powerpc/atomic.h
index ed4b345ed75d..c5b12fd2b46b 100644
--- a/include/asm-powerpc/atomic.h
+++ b/include/asm-powerpc/atomic.h
@@ -9,21 +9,13 @@ typedef struct { volatile int counter; } atomic_t;
#ifdef __KERNEL__
#include <asm/synch.h>
+#include <asm/asm-compat.h>
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
-/* Erratum #77 on the 405 means we need a sync or dcbt before every stwcx.
- * The old ATOMIC_SYNC_FIX covered some but not all of this.
- */
-#ifdef CONFIG_IBM405_ERR77
-#define PPC405_ERR77(ra,rb) "dcbt " #ra "," #rb ";"
-#else
-#define PPC405_ERR77(ra,rb)
-#endif
-
static __inline__ void atomic_add(int a, atomic_t *v)
{
int t;
diff --git a/include/asm-powerpc/bitops.h b/include/asm-powerpc/bitops.h
index dc25c53704d5..5727229b0444 100644
--- a/include/asm-powerpc/bitops.h
+++ b/include/asm-powerpc/bitops.h
@@ -40,6 +40,7 @@
#include <linux/compiler.h>
#include <asm/atomic.h>
+#include <asm/asm-compat.h>
#include <asm/synch.h>
/*
@@ -52,16 +53,6 @@
#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
-#ifdef CONFIG_PPC64
-#define LARXL "ldarx"
-#define STCXL "stdcx."
-#define CNTLZL "cntlzd"
-#else
-#define LARXL "lwarx"
-#define STCXL "stwcx."
-#define CNTLZL "cntlzw"
-#endif
-
static __inline__ void set_bit(int nr, volatile unsigned long *addr)
{
unsigned long old;
@@ -69,10 +60,10 @@ static __inline__ void set_bit(int nr, volatile unsigned long *addr)
unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr);
__asm__ __volatile__(
-"1:" LARXL " %0,0,%3 # set_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # set_bit\n"
"or %0,%0,%2\n"
PPC405_ERR77(0,%3)
- STCXL " %0,0,%3\n"
+ PPC_STLCX "%0,0,%3\n"
"bne- 1b"
: "=&r"(old), "=m"(*p)
: "r"(mask), "r"(p), "m"(*p)
@@ -86,10 +77,10 @@ static __inline__ void clear_bit(int nr, volatile unsigned long *addr)
unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr);
__asm__ __volatile__(
-"1:" LARXL " %0,0,%3 # set_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # clear_bit\n"
"andc %0,%0,%2\n"
PPC405_ERR77(0,%3)
- STCXL " %0,0,%3\n"
+ PPC_STLCX "%0,0,%3\n"
"bne- 1b"
: "=&r"(old), "=m"(*p)
: "r"(mask), "r"(p), "m"(*p)
@@ -103,10 +94,10 @@ static __inline__ void change_bit(int nr, volatile unsigned long *addr)
unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr);
__asm__ __volatile__(
-"1:" LARXL " %0,0,%3 # set_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # change_bit\n"
"xor %0,%0,%2\n"
PPC405_ERR77(0,%3)
- STCXL " %0,0,%3\n"
+ PPC_STLCX "%0,0,%3\n"
"bne- 1b"
: "=&r"(old), "=m"(*p)
: "r"(mask), "r"(p), "m"(*p)
@@ -122,10 +113,10 @@ static __inline__ int test_and_set_bit(unsigned long nr,
__asm__ __volatile__(
EIEIO_ON_SMP
-"1:" LARXL " %0,0,%3 # test_and_set_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # test_and_set_bit\n"
"or %1,%0,%2 \n"
PPC405_ERR77(0,%3)
- STCXL " %1,0,%3 \n"
+ PPC_STLCX "%1,0,%3 \n"
"bne- 1b"
ISYNC_ON_SMP
: "=&r" (old), "=&r" (t)
@@ -144,10 +135,10 @@ static __inline__ int test_and_clear_bit(unsigned long nr,
__asm__ __volatile__(
EIEIO_ON_SMP
-"1:" LARXL " %0,0,%3 # test_and_clear_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # test_and_clear_bit\n"
"andc %1,%0,%2 \n"
PPC405_ERR77(0,%3)
- STCXL " %1,0,%3 \n"
+ PPC_STLCX "%1,0,%3 \n"
"bne- 1b"
ISYNC_ON_SMP
: "=&r" (old), "=&r" (t)
@@ -166,10 +157,10 @@ static __inline__ int test_and_change_bit(unsigned long nr,
__asm__ __volatile__(
EIEIO_ON_SMP
-"1:" LARXL " %0,0,%3 # test_and_change_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # test_and_change_bit\n"
"xor %1,%0,%2 \n"
PPC405_ERR77(0,%3)
- STCXL " %1,0,%3 \n"
+ PPC_STLCX "%1,0,%3 \n"
"bne- 1b"
ISYNC_ON_SMP
: "=&r" (old), "=&r" (t)
@@ -184,9 +175,9 @@ static __inline__ void set_bits(unsigned long mask, unsigned long *addr)
unsigned long old;
__asm__ __volatile__(
-"1:" LARXL " %0,0,%3 # set_bit\n"
+"1:" PPC_LLARX "%0,0,%3 # set_bits\n"
"or %0,%0,%2\n"
- STCXL " %0,0,%3\n"
+ PPC_STLCX "%0,0,%3\n"
"bne- 1b"
: "=&r" (old), "=m" (*addr)
: "r" (mask), "r" (addr), "m" (*addr)
@@ -268,7 +259,7 @@ static __inline__ int __ilog2(unsigned long x)
{
int lz;
- asm (CNTLZL " %0,%1" : "=r" (lz) : "r" (x));
+ asm (PPC_CNTLZL "%0,%1" : "=r" (lz) : "r" (x));
return BITS_PER_LONG - 1 - lz;
}
diff --git a/include/asm-powerpc/bug.h b/include/asm-powerpc/bug.h
index d625ee55f957..b001ecb3cd99 100644
--- a/include/asm-powerpc/bug.h
+++ b/include/asm-powerpc/bug.h
@@ -1,6 +1,7 @@
#ifndef _ASM_POWERPC_BUG_H
#define _ASM_POWERPC_BUG_H
+#include <asm/asm-compat.h>
/*
* Define an illegal instr to trap on the bug.
* We don't use 0 because that marks the end of a function
@@ -11,14 +12,6 @@
#ifndef __ASSEMBLY__
-#ifdef __powerpc64__
-#define BUG_TABLE_ENTRY ".llong"
-#define BUG_TRAP_OP "tdnei"
-#else
-#define BUG_TABLE_ENTRY ".long"
-#define BUG_TRAP_OP "twnei"
-#endif /* __powerpc64__ */
-
struct bug_entry {
unsigned long bug_addr;
long line;
@@ -40,16 +33,16 @@ struct bug_entry *find_bug(unsigned long bugaddr);
__asm__ __volatile__( \
"1: twi 31,0,0\n" \
".section __bug_table,\"a\"\n" \
- "\t"BUG_TABLE_ENTRY" 1b,%0,%1,%2\n" \
+ "\t"PPC_LONG" 1b,%0,%1,%2\n" \
".previous" \
: : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
} while (0)
#define BUG_ON(x) do { \
__asm__ __volatile__( \
- "1: "BUG_TRAP_OP" %0,0\n" \
+ "1: "PPC_TLNEI" %0,0\n" \
".section __bug_table,\"a\"\n" \
- "\t"BUG_TABLE_ENTRY" 1b,%1,%2,%3\n" \
+ "\t"PPC_LONG" 1b,%1,%2,%3\n" \
".previous" \
: : "r" ((long)(x)), "i" (__LINE__), \
"i" (__FILE__), "i" (__FUNCTION__)); \
@@ -57,9 +50,9 @@ struct bug_entry *find_bug(unsigned long bugaddr);
#define WARN_ON(x) do { \
__asm__ __volatile__( \
- "1: "BUG_TRAP_OP" %0,0\n" \
+ "1: "PPC_TLNEI" %0,0\n" \
".section __bug_table,\"a\"\n" \
- "\t"BUG_TABLE_ENTRY" 1b,%1,%2,%3\n" \
+ "\t"PPC_LONG" 1b,%1,%2,%3\n" \
".previous" \
: : "r" ((long)(x)), \
"i" (__LINE__ + BUG_WARNING_TRAP), \
diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h
index 79a0556a0ab8..f89fd883e892 100644
--- a/include/asm-powerpc/cputable.h
+++ b/include/asm-powerpc/cputable.h
@@ -2,7 +2,7 @@
#define __ASM_POWERPC_CPUTABLE_H
#include <linux/config.h>
-#include <asm/ppc_asm.h> /* for ASM_CONST */
+#include <asm/asm-compat.h>
#define PPC_FEATURE_32 0x80000000
#define PPC_FEATURE_64 0x40000000
diff --git a/include/asm-powerpc/futex.h b/include/asm-powerpc/futex.h
index 37c94e52ab6d..f0319d50b129 100644
--- a/include/asm-powerpc/futex.h
+++ b/include/asm-powerpc/futex.h
@@ -7,13 +7,14 @@
#include <asm/errno.h>
#include <asm/synch.h>
#include <asm/uaccess.h>
-#include <asm/ppc_asm.h>
+#include <asm/asm-compat.h>
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
__asm__ __volatile ( \
SYNC_ON_SMP \
"1: lwarx %0,0,%2\n" \
insn \
+ PPC405_ERR77(0, %2) \
"2: stwcx. %1,0,%2\n" \
"bne- 1b\n" \
"li %1,0\n" \
@@ -23,7 +24,7 @@
".previous\n" \
".section __ex_table,\"a\"\n" \
".align 3\n" \
- DATAL " 1b,4b,2b,4b\n" \
+ PPC_LONG "1b,4b,2b,4b\n" \
".previous" \
: "=&r" (oldval), "=&r" (ret) \
: "b" (uaddr), "i" (-EFAULT), "1" (oparg) \
diff --git a/include/asm-powerpc/ppc_asm.h b/include/asm-powerpc/ppc_asm.h
index c534ca41224b..c27baa0563fe 100644
--- a/include/asm-powerpc/ppc_asm.h
+++ b/include/asm-powerpc/ppc_asm.h
@@ -6,8 +6,13 @@
#include <linux/stringify.h>
#include <linux/config.h>
+#include <asm/asm-compat.h>
-#ifdef __ASSEMBLY__
+#ifndef __ASSEMBLY__
+#error __FILE__ should only be used in assembler files
+#else
+
+#define SZL (BITS_PER_LONG/8)
/*
* Macros for storing registers into and loading registers from
@@ -184,12 +189,6 @@ n:
oris reg,reg,(label)@h; \
ori reg,reg,(label)@l;
-/* operations for longs and pointers */
-#define LDL ld
-#define STL std
-#define CMPI cmpdi
-#define SZL 8
-
/* offsets for stack frame layout */
#define LRSAVE 16
@@ -203,12 +202,6 @@ n:
#define OFF(name) name@l
-/* operations for longs and pointers */
-#define LDL lwz
-#define STL stw
-#define CMPI cmpwi
-#define SZL 4
-
/* offsets for stack frame layout */
#define LRSAVE 4
@@ -266,15 +259,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
#endif
-#ifdef CONFIG_IBM405_ERR77
-#define PPC405_ERR77(ra,rb) dcbt ra, rb;
-#define PPC405_ERR77_SYNC sync;
-#else
-#define PPC405_ERR77(ra,rb)
-#define PPC405_ERR77_SYNC
-#endif
-
-
#ifdef CONFIG_IBM440EP_ERR42
#define PPC440EP_ERR42 isync
#else
@@ -502,17 +486,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
#define N_SLINE 68
#define N_SO 100
-#define ASM_CONST(x) x
-#else
- #define __ASM_CONST(x) x##UL
- #define ASM_CONST(x) __ASM_CONST(x)
-
-#ifdef CONFIG_PPC64
-#define DATAL ".llong"
-#else
-#define DATAL ".long"
-#endif
-
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PPC_ASM_H */
diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h
index 3536a5cd7a2d..f0cce5a30235 100644
--- a/include/asm-powerpc/system.h
+++ b/include/asm-powerpc/system.h
@@ -8,7 +8,6 @@
#include <linux/kernel.h>
#include <asm/hw_irq.h>
-#include <asm/ppc_asm.h>
#include <asm/atomic.h>
/*
diff --git a/include/asm-powerpc/uaccess.h b/include/asm-powerpc/uaccess.h
index 33af730f0d19..3872e924cdd6 100644
--- a/include/asm-powerpc/uaccess.h
+++ b/include/asm-powerpc/uaccess.h
@@ -120,14 +120,6 @@ struct exception_table_entry {
extern long __put_user_bad(void);
-#ifdef __powerpc64__
-#define __EX_TABLE_ALIGN "3"
-#define __EX_TABLE_TYPE "llong"
-#else
-#define __EX_TABLE_ALIGN "2"
-#define __EX_TABLE_TYPE "long"
-#endif
-
/*
* We don't tell gcc that we are accessing memory, but this is OK
* because we do not write to any memory gcc knows about, so there
@@ -142,11 +134,12 @@ extern long __put_user_bad(void);
" b 2b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align " __EX_TABLE_ALIGN "\n" \
- " ."__EX_TABLE_TYPE" 1b,3b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,3b\n" \
".previous" \
: "=r" (err) \
- : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err))
+ : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err),\
+ "i"(sizeof(unsigned long)))
#ifdef __powerpc64__
#define __put_user_asm2(x, ptr, retval) \
@@ -162,12 +155,13 @@ extern long __put_user_bad(void);
" b 3b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align " __EX_TABLE_ALIGN "\n" \
- " ." __EX_TABLE_TYPE " 1b,4b\n" \
- " ." __EX_TABLE_TYPE " 2b,4b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,4b\n" \
+ PPC_LONG "2b,4b\n" \
".previous" \
: "=r" (err) \
- : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err))
+ : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err),\
+ "i"(sizeof(unsigned long)))
#endif /* __powerpc64__ */
#define __put_user_size(x, ptr, size, retval) \
@@ -213,11 +207,12 @@ extern long __get_user_bad(void);
" b 2b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align "__EX_TABLE_ALIGN "\n" \
- " ." __EX_TABLE_TYPE " 1b,3b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,3b\n" \
".previous" \
: "=r" (err), "=r" (x) \
- : "b" (addr), "i" (-EFAULT), "0" (err))
+ : "b" (addr), "i" (-EFAULT), "0" (err), \
+ "i"(sizeof(unsigned long)))
#ifdef __powerpc64__
#define __get_user_asm2(x, addr, err) \
@@ -235,12 +230,13 @@ extern long __get_user_bad(void);
" b 3b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align " __EX_TABLE_ALIGN "\n" \
- " ." __EX_TABLE_TYPE " 1b,4b\n" \
- " ." __EX_TABLE_TYPE " 2b,4b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,4b\n" \
+ PPC_LONG "2b,4b\n" \
".previous" \
: "=r" (err), "=&r" (x) \
- : "b" (addr), "i" (-EFAULT), "0" (err))
+ : "b" (addr), "i" (-EFAULT), "0" (err), \
+ "i"(sizeof(unsigned long)))
#endif /* __powerpc64__ */
#define __get_user_size(x, ptr, size, retval) \