diff options
Diffstat (limited to 'arch/mips/math-emu/dsemul.c')
| -rw-r--r-- | arch/mips/math-emu/dsemul.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c index bca7c4367ca4..46b964d2b79c 100644 --- a/arch/mips/math-emu/dsemul.c +++ b/arch/mips/math-emu/dsemul.c @@ -38,6 +38,7 @@ struct emuframe { */ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) { + int isa16 = get_isa16_mode(regs->cp0_epc); mips_instruction break_math; struct emuframe __user *fr; int err; @@ -47,7 +48,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) return -1; /* microMIPS instructions */ - if (get_isa16_mode(regs->cp0_epc)) { + if (isa16) { union mips_instruction insn = { .word = ir }; /* NOP16 aka MOVE16 $0, $0 */ @@ -81,7 +82,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) * multiprocessor support. For Linux we use a BREAK 514 * instruction causing a breakpoint exception. */ - break_math = BREAK_MATH(get_isa16_mode(regs->cp0_epc)); + break_math = BREAK_MATH(isa16); /* Ensure that the two instructions are in the same cache line */ fr = (struct emuframe __user *) @@ -91,7 +92,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) if (unlikely(!access_ok(VERIFY_WRITE, fr, sizeof(struct emuframe)))) return SIGBUS; - if (get_isa16_mode(regs->cp0_epc)) { + if (isa16) { err = __put_user(ir >> 16, (u16 __user *)(&fr->emul)); err |= __put_user(ir & 0xffff, @@ -113,8 +114,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) return SIGBUS; } - regs->cp0_epc = ((unsigned long) &fr->emul) | - get_isa16_mode(regs->cp0_epc); + regs->cp0_epc = (unsigned long)&fr->emul | isa16; flush_cache_sigtramp((unsigned long)&fr->emul); @@ -123,6 +123,7 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc) int do_dsemulret(struct pt_regs *xcp) { + int isa16 = get_isa16_mode(xcp->cp0_epc); struct emuframe __user *fr; unsigned long epc; u32 insn, cookie; @@ -145,7 +146,7 @@ int do_dsemulret(struct pt_regs *xcp) * - Is the instruction pointed to by the EPC an BREAK_MATH? * - Is the following memory word the BD_COOKIE? */ - if (get_isa16_mode(xcp->cp0_epc)) { + if (isa16) { err = __get_user(instr[0], (u16 __user *)(&fr->badinst)); err |= __get_user(instr[1], @@ -156,8 +157,8 @@ int do_dsemulret(struct pt_regs *xcp) } err |= __get_user(cookie, &fr->cookie); - if (unlikely(err || insn != BREAK_MATH(get_isa16_mode(xcp->cp0_epc)) || - cookie != BD_COOKIE)) { + if (unlikely(err || + insn != BREAK_MATH(isa16) || cookie != BD_COOKIE)) { MIPS_FPU_EMU_INC_STATS(errors); return 0; } |