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-rw-r--r--include/asm-mips/delay.h11
-rw-r--r--include/asm-mips/stackframe.h9
-rw-r--r--include/asm-mips/uaccess.h13
3 files changed, 29 insertions, 4 deletions
diff --git a/include/asm-mips/delay.h b/include/asm-mips/delay.h
index de5105d05f1..b0bccd2c4ed 100644
--- a/include/asm-mips/delay.h
+++ b/include/asm-mips/delay.h
@@ -28,7 +28,7 @@ static inline void __delay(unsigned long loops)
" .set reorder \n"
: "=r" (loops)
: "0" (loops));
- else if (sizeof(long) == 8)
+ else if (sizeof(long) == 8 && !DADDI_WAR)
__asm__ __volatile__ (
" .set noreorder \n"
" .align 3 \n"
@@ -37,6 +37,15 @@ static inline void __delay(unsigned long loops)
" .set reorder \n"
: "=r" (loops)
: "0" (loops));
+ else if (sizeof(long) == 8 && DADDI_WAR)
+ __asm__ __volatile__ (
+ " .set noreorder \n"
+ " .align 3 \n"
+ "1: bnez %0, 1b \n"
+ " dsubu %0, %2 \n"
+ " .set reorder \n"
+ : "=r" (loops)
+ : "0" (loops), "r" (1));
}
diff --git a/include/asm-mips/stackframe.h b/include/asm-mips/stackframe.h
index fb41a8d7639..051e1af0bb9 100644
--- a/include/asm-mips/stackframe.h
+++ b/include/asm-mips/stackframe.h
@@ -6,6 +6,7 @@
* Copyright (C) 1994, 95, 96, 99, 2001 Ralf Baechle
* Copyright (C) 1994, 1995, 1996 Paul M. Antoine.
* Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 2007 Maciej W. Rozycki
*/
#ifndef _ASM_STACKFRAME_H
#define _ASM_STACKFRAME_H
@@ -145,8 +146,16 @@
.set reorder
/* Called from user mode, new stack. */
get_saved_sp
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
8: move k0, sp
PTR_SUBU sp, k1, PT_SIZE
+#else
+ .set at=k0
+8: PTR_SUBU k1, PT_SIZE
+ .set noat
+ move k0, sp
+ move sp, k1
+#endif
LONG_S k0, PT_R29(sp)
LONG_S $3, PT_R3(sp)
/*
diff --git a/include/asm-mips/uaccess.h b/include/asm-mips/uaccess.h
index c30c718994c..66523d61095 100644
--- a/include/asm-mips/uaccess.h
+++ b/include/asm-mips/uaccess.h
@@ -5,6 +5,7 @@
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 03, 04 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2007 Maciej W. Rozycki
*/
#ifndef _ASM_UACCESS_H
#define _ASM_UACCESS_H
@@ -387,6 +388,12 @@ extern void __put_user_unknown(void);
"jal\t" #destination "\n\t"
#endif
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
+#define DADDI_SCRATCH "$0"
+#else
+#define DADDI_SCRATCH "$3"
+#endif
+
extern size_t __copy_user(void *__to, const void *__from, size_t __n);
#define __invoke_copy_to_user(to, from, n) \
@@ -403,7 +410,7 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n);
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
- "memory"); \
+ DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})
@@ -512,7 +519,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
- "memory"); \
+ DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})
@@ -535,7 +542,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \
- "memory"); \
+ DADDI_SCRATCH, "memory"); \
__cu_len_r; \
})