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Diffstat (limited to 'arch/mips/mm/pg-r4k.c')
-rw-r--r--arch/mips/mm/pg-r4k.c66
1 files changed, 31 insertions, 35 deletions
diff --git a/arch/mips/mm/pg-r4k.c b/arch/mips/mm/pg-r4k.c
index 4f770ac885ce..9185fbf37c0d 100644
--- a/arch/mips/mm/pg-r4k.c
+++ b/arch/mips/mm/pg-r4k.c
@@ -4,6 +4,7 @@
* 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>
@@ -12,6 +13,7 @@
#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>
@@ -255,64 +257,58 @@ static inline void build_store_reg(int reg)
__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)