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-rw-r--r--arch/mips/lib/csum_partial.S61
-rw-r--r--arch/mips/lib/memcpy-inatomic.S25
-rw-r--r--arch/mips/lib/memcpy.S60
-rw-r--r--arch/mips/lib/memset.S11
-rw-r--r--arch/mips/lib/strncpy_user.S4
5 files changed, 130 insertions, 31 deletions
diff --git a/arch/mips/lib/csum_partial.S b/arch/mips/lib/csum_partial.S
index c0a77fe038b..957a82484e3 100644
--- a/arch/mips/lib/csum_partial.S
+++ b/arch/mips/lib/csum_partial.S
@@ -7,6 +7,7 @@
*
* Copyright (C) 1998, 1999 Ralf Baechle
* Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 2007 Maciej W. Rozycki
*/
#include <linux/errno.h>
#include <asm/asm.h>
@@ -52,9 +53,12 @@
#define UNIT(unit) ((unit)*NBYTES)
#define ADDC(sum,reg) \
+ .set push; \
+ .set noat; \
ADD sum, reg; \
sltu v1, sum, reg; \
- ADD sum, v1
+ ADD sum, v1; \
+ .set pop
#define CSUM_BIGCHUNK1(src, offset, sum, _t0, _t1, _t2, _t3) \
LOAD _t0, (offset + UNIT(0))(src); \
@@ -178,8 +182,10 @@ move_128bytes:
CSUM_BIGCHUNK(src, 0x40, sum, t0, t1, t3, t4)
CSUM_BIGCHUNK(src, 0x60, sum, t0, t1, t3, t4)
LONG_SUBU t8, t8, 0x01
+ .set reorder /* DADDI_WAR */
+ PTR_ADDU src, src, 0x80
bnez t8, move_128bytes
- PTR_ADDU src, src, 0x80
+ .set noreorder
1:
beqz t2, 1f
@@ -208,8 +214,10 @@ end_words:
lw t0, (src)
LONG_SUBU t8, t8, 0x1
ADDC(sum, t0)
+ .set reorder /* DADDI_WAR */
+ PTR_ADDU src, src, 0x4
bnez t8, end_words
- PTR_ADDU src, src, 0x4
+ .set noreorder
/* unknown src alignment and < 8 bytes to go */
small_csumcpy:
@@ -246,6 +254,8 @@ small_csumcpy:
1: ADDC(sum, t1)
/* fold checksum */
+ .set push
+ .set noat
#ifdef USE_DOUBLE
dsll32 v1, sum, 0
daddu sum, v1
@@ -266,6 +276,7 @@ small_csumcpy:
srl sum, sum, 8
or sum, v1
andi sum, 0xffff
+ .set pop
1:
.set reorder
/* Add the passed partial csum. */
@@ -373,7 +384,11 @@ small_csumcpy:
#define ADDRMASK (NBYTES-1)
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
.set noat
+#else
+ .set at=v1
+#endif
LEAF(__csum_partial_copy_user)
PTR_ADDU AT, src, len /* See (1) above. */
@@ -441,8 +456,10 @@ EXC( STORE t6, UNIT(6)(dst), s_exc)
ADDC(sum, t6)
EXC( STORE t7, UNIT(7)(dst), s_exc)
ADDC(sum, t7)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 8*NBYTES
bgez len, 1b
- ADD dst, dst, 8*NBYTES
+ .set noreorder
ADD len, 8*NBYTES # revert len (see above)
/*
@@ -471,8 +488,10 @@ EXC( STORE t2, UNIT(2)(dst), s_exc)
ADDC(sum, t2)
EXC( STORE t3, UNIT(3)(dst), s_exc)
ADDC(sum, t3)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 4*NBYTES
beqz len, done
- ADD dst, dst, 4*NBYTES
+ .set noreorder
less_than_4units:
/*
* rem = len % NBYTES
@@ -485,8 +504,10 @@ EXC( LOAD t0, 0(src), l_exc)
SUB len, len, NBYTES
EXC( STORE t0, 0(dst), s_exc)
ADDC(sum, t0)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, NBYTES
bne rem, len, 1b
- ADD dst, dst, NBYTES
+ .set noreorder
/*
* src and dst are aligned, need to copy rem bytes (rem < NBYTES)
@@ -572,8 +593,10 @@ EXC( STORE t2, UNIT(2)(dst), s_exc)
ADDC(sum, t2)
EXC( STORE t3, UNIT(3)(dst), s_exc)
ADDC(sum, t3)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 4*NBYTES
bne len, rem, 1b
- ADD dst, dst, 4*NBYTES
+ .set noreorder
cleanup_src_unaligned:
beqz len, done
@@ -587,8 +610,10 @@ EXC( LDREST t0, REST(0)(src), l_exc_copy)
SUB len, len, NBYTES
EXC( STORE t0, 0(dst), s_exc)
ADDC(sum, t0)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, NBYTES
bne len, rem, 1b
- ADD dst, dst, NBYTES
+ .set noreorder
copy_bytes_checklen:
beqz len, done
@@ -631,6 +656,8 @@ copy_bytes_done:
ADDC(sum, t2)
done:
/* fold checksum */
+ .set push
+ .set noat
#ifdef USE_DOUBLE
dsll32 v1, sum, 0
daddu sum, v1
@@ -651,6 +678,7 @@ done:
srl sum, sum, 8
or sum, v1
andi sum, 0xffff
+ .set pop
1:
.set reorder
ADDC(sum, psum)
@@ -678,8 +706,10 @@ EXC( lbu t1, 0(src), l_exc)
SLLV t1, t1, t2
addu t2, SHIFT_INC
ADDC(sum, t1)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 1
bne src, t0, 1b
- ADD dst, dst, 1
+ .set noreorder
l_exc:
LOAD t0, TI_TASK($28)
nop
@@ -697,12 +727,22 @@ l_exc:
* Clear len bytes starting at dst. Can't call __bzero because it
* might modify len. An inefficient loop for these rare times...
*/
+ .set reorder /* DADDI_WAR */
+ SUB src, len, 1
beqz len, done
- SUB src, len, 1
+ .set noreorder
1: sb zero, 0(dst)
ADD dst, dst, 1
+ .set push
+ .set noat
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
bnez src, 1b
SUB src, src, 1
+#else
+ li v1, 1
+ bnez src, 1b
+ SUB src, src, v1
+#endif
li v1, -EFAULT
b done
sw v1, (errptr)
@@ -712,4 +752,5 @@ s_exc:
li v1, -EFAULT
jr ra
sw v1, (errptr)
+ .set pop
END(__csum_partial_copy_user)
diff --git a/arch/mips/lib/memcpy-inatomic.S b/arch/mips/lib/memcpy-inatomic.S
index 3a534b2baa0..d1b08f5d686 100644
--- a/arch/mips/lib/memcpy-inatomic.S
+++ b/arch/mips/lib/memcpy-inatomic.S
@@ -9,6 +9,7 @@
* Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc.
* Copyright (C) 2002 Broadcom, Inc.
* memcpy/copy_user author: Mark Vandevoorde
+ * Copyright (C) 2007 Maciej W. Rozycki
*
* Mnemonic names for arguments to memcpy/__copy_user
*/
@@ -175,7 +176,11 @@
.text
.set noreorder
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
.set noat
+#else
+ .set at=v1
+#endif
/*
* A combined memcpy/__copy_user
@@ -268,8 +273,10 @@ EXC( LOAD t3, UNIT(3)(src), l_exc_copy)
STORE t1, UNIT(1)(dst)
STORE t2, UNIT(2)(dst)
STORE t3, UNIT(3)(dst)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 4*NBYTES
beqz len, done
- ADD dst, dst, 4*NBYTES
+ .set noreorder
less_than_4units:
/*
* rem = len % NBYTES
@@ -281,8 +288,10 @@ EXC( LOAD t0, 0(src), l_exc)
ADD src, src, NBYTES
SUB len, len, NBYTES
STORE t0, 0(dst)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, NBYTES
bne rem, len, 1b
- ADD dst, dst, NBYTES
+ .set noreorder
/*
* src and dst are aligned, need to copy rem bytes (rem < NBYTES)
@@ -361,8 +370,10 @@ EXC( LDREST t3, REST(3)(src), l_exc_copy)
STORE t2, UNIT(2)(dst)
STORE t3, UNIT(3)(dst)
PREF( 1, 9*32(dst) ) # 1 is PREF_STORE (not streamed)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 4*NBYTES
bne len, rem, 1b
- ADD dst, dst, 4*NBYTES
+ .set noreorder
cleanup_src_unaligned:
beqz len, done
@@ -375,8 +386,10 @@ EXC( LDREST t0, REST(0)(src), l_exc_copy)
ADD src, src, NBYTES
SUB len, len, NBYTES
STORE t0, 0(dst)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, NBYTES
bne len, rem, 1b
- ADD dst, dst, NBYTES
+ .set noreorder
copy_bytes_checklen:
beqz len, done
@@ -424,8 +437,10 @@ l_exc_copy:
EXC( lb t1, 0(src), l_exc)
ADD src, src, 1
sb t1, 0(dst) # can't fault -- we're copy_from_user
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 1
bne src, t0, 1b
- ADD dst, dst, 1
+ .set noreorder
l_exc:
LOAD t0, TI_TASK($28)
nop
diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S
index a526c62cb76..aded7b15905 100644
--- a/arch/mips/lib/memcpy.S
+++ b/arch/mips/lib/memcpy.S
@@ -9,6 +9,7 @@
* Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc.
* Copyright (C) 2002 Broadcom, Inc.
* memcpy/copy_user author: Mark Vandevoorde
+ * Copyright (C) 2007 Maciej W. Rozycki
*
* Mnemonic names for arguments to memcpy/__copy_user
*/
@@ -175,7 +176,11 @@
.text
.set noreorder
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
.set noat
+#else
+ .set at=v1
+#endif
/*
* A combined memcpy/__copy_user
@@ -271,8 +276,10 @@ EXC( STORE t0, UNIT(0)(dst), s_exc_p4u)
EXC( STORE t1, UNIT(1)(dst), s_exc_p3u)
EXC( STORE t2, UNIT(2)(dst), s_exc_p2u)
EXC( STORE t3, UNIT(3)(dst), s_exc_p1u)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 4*NBYTES
beqz len, done
- ADD dst, dst, 4*NBYTES
+ .set noreorder
less_than_4units:
/*
* rem = len % NBYTES
@@ -284,8 +291,10 @@ EXC( LOAD t0, 0(src), l_exc)
ADD src, src, NBYTES
SUB len, len, NBYTES
EXC( STORE t0, 0(dst), s_exc_p1u)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, NBYTES
bne rem, len, 1b
- ADD dst, dst, NBYTES
+ .set noreorder
/*
* src and dst are aligned, need to copy rem bytes (rem < NBYTES)
@@ -364,8 +373,10 @@ EXC( STORE t1, UNIT(1)(dst), s_exc_p3u)
EXC( STORE t2, UNIT(2)(dst), s_exc_p2u)
EXC( STORE t3, UNIT(3)(dst), s_exc_p1u)
PREF( 1, 9*32(dst) ) # 1 is PREF_STORE (not streamed)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 4*NBYTES
bne len, rem, 1b
- ADD dst, dst, 4*NBYTES
+ .set noreorder
cleanup_src_unaligned:
beqz len, done
@@ -378,8 +389,10 @@ EXC( LDREST t0, REST(0)(src), l_exc_copy)
ADD src, src, NBYTES
SUB len, len, NBYTES
EXC( STORE t0, 0(dst), s_exc_p1u)
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, NBYTES
bne len, rem, 1b
- ADD dst, dst, NBYTES
+ .set noreorder
copy_bytes_checklen:
beqz len, done
@@ -427,8 +440,10 @@ l_exc_copy:
EXC( lb t1, 0(src), l_exc)
ADD src, src, 1
sb t1, 0(dst) # can't fault -- we're copy_from_user
+ .set reorder /* DADDI_WAR */
+ ADD dst, dst, 1
bne src, t0, 1b
- ADD dst, dst, 1
+ .set noreorder
l_exc:
LOAD t0, TI_TASK($28)
nop
@@ -446,20 +461,33 @@ l_exc:
* Clear len bytes starting at dst. Can't call __bzero because it
* might modify len. An inefficient loop for these rare times...
*/
+ .set reorder /* DADDI_WAR */
+ SUB src, len, 1
beqz len, done
- SUB src, len, 1
+ .set noreorder
1: sb zero, 0(dst)
ADD dst, dst, 1
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
bnez src, 1b
SUB src, src, 1
+#else
+ .set push
+ .set noat
+ li v1, 1
+ bnez src, 1b
+ SUB src, src, v1
+ .set pop
+#endif
jr ra
nop
-#define SEXC(n) \
-s_exc_p ## n ## u: \
- jr ra; \
- ADD len, len, n*NBYTES
+#define SEXC(n) \
+ .set reorder; /* DADDI_WAR */ \
+s_exc_p ## n ## u: \
+ ADD len, len, n*NBYTES; \
+ jr ra; \
+ .set noreorder
SEXC(8)
SEXC(7)
@@ -471,8 +499,10 @@ SEXC(2)
SEXC(1)
s_exc_p1:
+ .set reorder /* DADDI_WAR */
+ ADD len, len, 1
jr ra
- ADD len, len, 1
+ .set noreorder
s_exc:
jr ra
nop
@@ -502,8 +532,10 @@ r_end_bytes:
SUB a2, a2, 0x1
sb t0, -1(a0)
SUB a1, a1, 0x1
+ .set reorder /* DADDI_WAR */
+ SUB a0, a0, 0x1
bnez a2, r_end_bytes
- SUB a0, a0, 0x1
+ .set noreorder
r_out:
jr ra
@@ -514,8 +546,10 @@ r_end_bytes_up:
SUB a2, a2, 0x1
sb t0, (a0)
ADD a1, a1, 0x1
+ .set reorder /* DADDI_WAR */
+ ADD a0, a0, 0x1
bnez a2, r_end_bytes_up
- ADD a0, a0, 0x1
+ .set noreorder
jr ra
move a2, zero
diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S
index 3f8b8b3d0b2..3bf38422342 100644
--- a/arch/mips/lib/memset.S
+++ b/arch/mips/lib/memset.S
@@ -5,6 +5,7 @@
*
* Copyright (C) 1998, 1999, 2000 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2007 Maciej W. Rozycki
*/
#include <asm/asm.h>
#include <asm/asm-offsets.h>
@@ -74,8 +75,16 @@ FEXPORT(__bzero)
bnez t0, small_memset
andi t0, a0, LONGMASK /* aligned? */
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
beqz t0, 1f
PTR_SUBU t0, LONGSIZE /* alignment in bytes */
+#else
+ .set noat
+ li AT, LONGSIZE
+ beqz t0, 1f
+ PTR_SUBU t0, AT /* alignment in bytes */
+ .set at
+#endif
#ifdef __MIPSEB__
EX(LONG_S_L, a1, (a0), first_fixup) /* make word/dword aligned */
@@ -106,7 +115,7 @@ memset_partial:
.set noat
LONG_SRL AT, t0, 1
PTR_SUBU t1, AT
- .set noat
+ .set at
#endif
jr t1
PTR_ADDU a0, t0 /* dest ptr */
diff --git a/arch/mips/lib/strncpy_user.S b/arch/mips/lib/strncpy_user.S
index d16c76fbfac..5c8fb9d6b7f 100644
--- a/arch/mips/lib/strncpy_user.S
+++ b/arch/mips/lib/strncpy_user.S
@@ -41,9 +41,9 @@ FEXPORT(__strncpy_from_user_nocheck_asm)
beqz t0, 2f
sb t0, (a0)
PTR_ADDIU v0, 1
- bne v0, a2, 1b
- PTR_ADDIU a0, 1
.set reorder
+ PTR_ADDIU a0, 1
+ bne v0, a2, 1b
2: PTR_ADDU t0, a1, v0
xor t0, a1
bltz t0, fault
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-16 13:19:27 +0000