* Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2001 MIPS Technologies, Inc.
- * Copyright (C) 2002 Maciej W. Rozycki
+ * Copyright (C) 2002, 2007 Maciej W. Rozycki
*/
#include <linux/init.h>
jr k0
rfe
#else
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
LONG_ADDIU k0, 4 /* stall on $k0 */
+#else
+ .set at=v1
+ LONG_ADDIU k0, 4
+ .set noat
+#endif
MTC0 k0, CP0_EPC
/* I hope three instructions between MTC0 and ERET are enough... */
ori k1, _THREAD_MASK
*
* 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>
#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); \
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
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:
1: ADDC(sum, t1)
/* fold checksum */
+ .set push
+ .set noat
#ifdef USE_DOUBLE
dsll32 v1, sum, 0
daddu sum, v1
srl sum, sum, 8
or sum, v1
andi sum, 0xffff
+ .set pop
1:
.set reorder
/* Add the passed partial csum. */
#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. */
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)
/*
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
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)
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
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
ADDC(sum, t2)
done:
/* fold checksum */
+ .set push
+ .set noat
#ifdef USE_DOUBLE
dsll32 v1, sum, 0
daddu sum, v1
srl sum, sum, 8
or sum, v1
andi sum, 0xffff
+ .set pop
1:
.set reorder
ADDC(sum, psum)
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
* 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)
li v1, -EFAULT
jr ra
sw v1, (errptr)
+ .set pop
END(__csum_partial_copy_user)
* 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
*/
.text
.set noreorder
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
.set noat
+#else
+ .set at=v1
+#endif
/*
* A combined memcpy/__copy_user
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
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)
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
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
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
* 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
*/
.text
.set noreorder
+#ifndef CONFIG_CPU_DADDI_WORKAROUNDS
.set noat
+#else
+ .set at=v1
+#endif
/*
* A combined memcpy/__copy_user
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
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)
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
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
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
* 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)
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
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
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
*
* 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>
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 */
.set noat
LONG_SRL AT, t0, 1
PTR_SUBU t1, AT
- .set noat
+ .set at
#endif
jr t1
PTR_ADDU a0, t0 /* dest ptr */
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
* for more details.
*
* Copyright (C) 2003, 04, 05 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2007 Maciej W. Rozycki
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
+#include <asm/bugs.h>
#include <asm/cacheops.h>
#include <asm/inst.h>
#include <asm/io.h>
__build_store_reg(reg);
}
-static inline void build_addiu_a2_a0(unsigned long offset)
+static inline void build_addiu_rt_rs(unsigned int rt, unsigned int rs,
+ unsigned long offset)
{
union mips_instruction mi;
BUG_ON(offset > 0x7fff);
- mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
- mi.i_format.rs = 4; /* $a0 */
- mi.i_format.rt = 6; /* $a2 */
- mi.i_format.simmediate = offset;
+ if (cpu_has_64bit_gp_regs && DADDI_WAR && r4k_daddiu_bug()) {
+ mi.i_format.opcode = addiu_op;
+ mi.i_format.rs = 0; /* $zero */
+ mi.i_format.rt = 25; /* $t9 */
+ mi.i_format.simmediate = offset;
+ emit_instruction(mi);
+ mi.r_format.opcode = spec_op;
+ mi.r_format.rs = rs;
+ mi.r_format.rt = 25; /* $t9 */
+ mi.r_format.rd = rt;
+ mi.r_format.re = 0;
+ mi.r_format.func = daddu_op;
+ } else {
+ mi.i_format.opcode = cpu_has_64bit_gp_regs ?
+ daddiu_op : addiu_op;
+ mi.i_format.rs = rs;
+ mi.i_format.rt = rt;
+ mi.i_format.simmediate = offset;
+ }
emit_instruction(mi);
}
-static inline void build_addiu_a2(unsigned long offset)
+static inline void build_addiu_a2_a0(unsigned long offset)
{
- union mips_instruction mi;
-
- BUG_ON(offset > 0x7fff);
-
- mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
- mi.i_format.rs = 6; /* $a2 */
- mi.i_format.rt = 6; /* $a2 */
- mi.i_format.simmediate = offset;
+ build_addiu_rt_rs(6, 4, offset); /* $a2, $a0, offset */
+}
- emit_instruction(mi);
+static inline void build_addiu_a2(unsigned long offset)
+{
+ build_addiu_rt_rs(6, 6, offset); /* $a2, $a2, offset */
}
static inline void build_addiu_a1(unsigned long offset)
{
- union mips_instruction mi;
-
- BUG_ON(offset > 0x7fff);
-
- mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
- mi.i_format.rs = 5; /* $a1 */
- mi.i_format.rt = 5; /* $a1 */
- mi.i_format.simmediate = offset;
+ build_addiu_rt_rs(5, 5, offset); /* $a1, $a1, offset */
load_offset -= offset;
-
- emit_instruction(mi);
}
static inline void build_addiu_a0(unsigned long offset)
{
- union mips_instruction mi;
-
- BUG_ON(offset > 0x7fff);
-
- mi.i_format.opcode = cpu_has_64bit_gp_regs ? daddiu_op : addiu_op;
- mi.i_format.rs = 4; /* $a0 */
- mi.i_format.rt = 4; /* $a0 */
- mi.i_format.simmediate = offset;
+ build_addiu_rt_rs(4, 4, offset); /* $a0, $a0, offset */
store_offset -= offset;
-
- emit_instruction(mi);
}
static inline void build_bne(unsigned int *dest)
* Synthesize TLB refill handlers at runtime.
*
* Copyright (C) 2004,2005,2006 by Thiemo Seufer
- * Copyright (C) 2005 Maciej W. Rozycki
+ * Copyright (C) 2005, 2007 Maciej W. Rozycki
* Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org)
*
* ... and the days got worse and worse and now you see
#include <linux/string.h>
#include <linux/init.h>
+#include <asm/bugs.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
#include <asm/mmu_context.h>
break;
}
- if (!ip)
+ if (!ip || (opc == insn_daddiu && r4k_daddiu_bug()))
panic("Unsupported TLB synthesizer instruction %d", opc);
op = ip->match;
#define i_ssnop(buf) i_sll(buf, 0, 0, 1)
#define i_ehb(buf) i_sll(buf, 0, 0, 3)
-#ifdef CONFIG_64BIT
static __init int __maybe_unused in_compat_space_p(long addr)
{
/* Is this address in 32bit compat space? */
+#ifdef CONFIG_64BIT
return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
+#else
+ return 1;
+#endif
}
static __init int __maybe_unused rel_highest(long val)
{
+#ifdef CONFIG_64BIT
return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
+#else
+ return 0;
+#endif
}
static __init int __maybe_unused rel_higher(long val)
{
+#ifdef CONFIG_64BIT
return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
-}
+#else
+ return 0;
#endif
+}
static __init int rel_hi(long val)
{
static __init void i_LA_mostly(u32 **buf, unsigned int rs, long addr)
{
-#ifdef CONFIG_64BIT
if (!in_compat_space_p(addr)) {
i_lui(buf, rs, rel_highest(addr));
if (rel_higher(addr))
} else
i_dsll32(buf, rs, rs, 0);
} else
-#endif
i_lui(buf, rs, rel_hi(addr));
}
-static __init void __maybe_unused i_LA(u32 **buf, unsigned int rs,
- long addr)
+static __init void __maybe_unused i_LA(u32 **buf, unsigned int rs, long addr)
{
i_LA_mostly(buf, rs, addr);
- if (rel_lo(addr))
- i_ADDIU(buf, rs, rs, rel_lo(addr));
+ if (rel_lo(addr)) {
+ if (!in_compat_space_p(addr))
+ i_daddiu(buf, rs, rs, rel_lo(addr));
+ else
+ i_addiu(buf, rs, rs, rel_lo(addr));
+ }
}
/*
} else {
i_LA_mostly(p, ptr, modd);
il_b(p, r, label_vmalloc_done);
- i_daddiu(p, ptr, ptr, rel_lo(modd));
+ if (in_compat_space_p(modd))
+ i_addiu(p, ptr, ptr, rel_lo(modd));
+ else
+ i_daddiu(p, ptr, ptr, rel_lo(modd));
}
l_vmalloc(l, *p);
} else {
i_LA_mostly(p, ptr, swpd);
il_b(p, r, label_vmalloc_done);
- i_daddiu(p, ptr, ptr, rel_lo(swpd));
+ if (in_compat_space_p(swpd))
+ i_addiu(p, ptr, ptr, rel_lo(swpd));
+ else
+ i_daddiu(p, ptr, ptr, rel_lo(swpd));
}
}
" .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"
" .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));
}
* 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
.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)
/*
*
* 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
"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) \
: "+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; \
})
: "+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; \
})
: "+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; \
})
projects / platform / kernel / linux-arm64.git / commitdiff