| Akira Takeuchi | 278d91c | 2010-10-27 17:28:52 +0100 | [diff] [blame] | 1 | /* MN10300 Low level FPU management operations |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public Licence |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the Licence, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/linkage.h> |
| 12 | #include <asm/cpu-regs.h> |
| 13 | #include <asm/smp.h> |
| 14 | #include <asm/thread_info.h> |
| 15 | #include <asm/asm-offsets.h> |
| 16 | #include <asm/frame.inc> |
| 17 | |
| 18 | ############################################################################### |
| 19 | # |
| 20 | # void fpu_disabled(void) |
| 21 | # - handle an exception due to the FPU being disabled |
| 22 | # when CONFIG_FPU is disabled |
| 23 | # |
| 24 | ############################################################################### |
| 25 | .type fpu_disabled,@function |
| 26 | .globl fpu_disabled |
| 27 | fpu_disabled: |
| 28 | add -4,sp |
| 29 | SAVE_ALL |
| 30 | mov -1,d0 |
| 31 | mov d0,(REG_ORIG_D0,fp) |
| 32 | |
| 33 | and ~EPSW_NMID,epsw |
| 34 | |
| 35 | mov fp,d0 |
| 36 | call unexpected_fpu_exception[],0 |
| 37 | jmp ret_from_exception |
| 38 | |
| 39 | .size fpu_disabled,.-fpu_disabled |