Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 1 | /* |
Sergei Poselenov | b448962 | 2007-07-05 08:17:37 +0200 | [diff] [blame] | 2 | * (C) Copyright 2007 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * Author: Sergei Poselenov <sposelenov@emcraft.com> |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 6 | * |
| 7 | * See file CREDITS for list of people who contributed to this |
| 8 | * project. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License as |
| 12 | * published by the Free Software Foundation; either version 2 of |
| 13 | * the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 23 | * MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | #include <config.h> |
| 27 | |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 28 | #if defined(CONFIG_440EP) || \ |
| 29 | defined(CONFIG_440EPX) |
| 30 | |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 31 | #include <asm/processor.h> |
Stefan Roese | b36df56 | 2010-09-09 19:18:00 +0200 | [diff] [blame] | 32 | #include <asm/ppc4xx.h> |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 33 | |
| 34 | |
| 35 | int fpu_status(void) |
| 36 | { |
Matthias Fuchs | 58ea142 | 2009-07-22 17:27:56 +0200 | [diff] [blame] | 37 | if (mfspr(SPRN_CCR0) & CCR0_DAPUIB) |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 38 | return 0; /* Disabled */ |
Wolfgang Denk | 4ef218f | 2007-07-10 00:01:28 +0200 | [diff] [blame] | 39 | else |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 40 | return 1; /* Enabled */ |
| 41 | } |
| 42 | |
| 43 | |
| 44 | void fpu_disable(void) |
| 45 | { |
Matthias Fuchs | 58ea142 | 2009-07-22 17:27:56 +0200 | [diff] [blame] | 46 | mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) | CCR0_DAPUIB); |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 47 | mtmsr(mfmsr() & ~MSR_FP); |
| 48 | } |
| 49 | |
| 50 | |
| 51 | void fpu_enable(void) |
| 52 | { |
Matthias Fuchs | 58ea142 | 2009-07-22 17:27:56 +0200 | [diff] [blame] | 53 | mtspr(SPRN_CCR0, mfspr(SPRN_CCR0) & ~CCR0_DAPUIB); |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 54 | mtmsr(mfmsr() | MSR_FP); |
| 55 | } |
Sergei Poselenov | b448962 | 2007-07-05 08:17:37 +0200 | [diff] [blame] | 56 | |
Igor Lisitsin | a11e069 | 2007-03-28 19:06:19 +0400 | [diff] [blame] | 57 | #endif |