mirror of https://gitee.com/openkylin/linux.git
198 lines
3.7 KiB
ArmAsm
198 lines
3.7 KiB
ArmAsm
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/* MN10300 Low level FPU management operations
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <asm/cpu-regs.h>
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###############################################################################
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#
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# void fpu_init_state(void)
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# - initialise the FPU
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#
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###############################################################################
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.globl fpu_init_state
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.type fpu_init_state,@function
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fpu_init_state:
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mov epsw,d0
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or EPSW_FE,epsw
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#ifdef CONFIG_MN10300_PROC_MN103E010
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nop
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nop
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nop
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#endif
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fmov 0,fs0
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fmov fs0,fs1
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fmov fs0,fs2
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fmov fs0,fs3
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fmov fs0,fs4
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fmov fs0,fs5
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fmov fs0,fs6
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fmov fs0,fs7
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fmov fs0,fs8
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fmov fs0,fs9
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fmov fs0,fs10
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fmov fs0,fs11
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fmov fs0,fs12
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fmov fs0,fs13
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fmov fs0,fs14
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fmov fs0,fs15
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fmov fs0,fs16
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fmov fs0,fs17
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fmov fs0,fs18
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fmov fs0,fs19
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fmov fs0,fs20
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fmov fs0,fs21
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fmov fs0,fs22
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fmov fs0,fs23
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fmov fs0,fs24
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fmov fs0,fs25
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fmov fs0,fs26
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fmov fs0,fs27
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fmov fs0,fs28
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fmov fs0,fs29
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fmov fs0,fs30
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fmov fs0,fs31
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fmov FPCR_INIT,fpcr
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#ifdef CONFIG_MN10300_PROC_MN103E010
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nop
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nop
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nop
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#endif
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mov d0,epsw
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ret [],0
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.size fpu_init_state,.-fpu_init_state
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###############################################################################
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#
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# void fpu_save(struct fpu_state_struct *)
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# - save the fpu state
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# - note that an FPU Operational exception might occur during this process
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#
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###############################################################################
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.globl fpu_save
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.type fpu_save,@function
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fpu_save:
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mov epsw,d1
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or EPSW_FE,epsw /* enable the FPU so we can access it */
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#ifdef CONFIG_MN10300_PROC_MN103E010
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nop
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nop
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#endif
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mov d0,a0
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fmov fs0,(a0+)
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fmov fs1,(a0+)
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fmov fs2,(a0+)
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fmov fs3,(a0+)
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fmov fs4,(a0+)
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fmov fs5,(a0+)
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fmov fs6,(a0+)
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fmov fs7,(a0+)
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fmov fs8,(a0+)
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fmov fs9,(a0+)
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fmov fs10,(a0+)
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fmov fs11,(a0+)
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fmov fs12,(a0+)
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fmov fs13,(a0+)
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fmov fs14,(a0+)
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fmov fs15,(a0+)
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fmov fs16,(a0+)
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fmov fs17,(a0+)
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fmov fs18,(a0+)
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fmov fs19,(a0+)
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fmov fs20,(a0+)
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fmov fs21,(a0+)
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fmov fs22,(a0+)
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fmov fs23,(a0+)
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fmov fs24,(a0+)
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fmov fs25,(a0+)
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fmov fs26,(a0+)
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fmov fs27,(a0+)
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fmov fs28,(a0+)
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fmov fs29,(a0+)
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fmov fs30,(a0+)
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fmov fs31,(a0+)
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fmov fpcr,d0
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mov d0,(a0)
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#ifdef CONFIG_MN10300_PROC_MN103E010
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nop
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nop
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#endif
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mov d1,epsw
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ret [],0
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.size fpu_save,.-fpu_save
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###############################################################################
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#
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# void fpu_restore(struct fpu_state_struct *)
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# - restore the fpu state
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# - note that an FPU Operational exception might occur during this process
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#
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###############################################################################
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.globl fpu_restore
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.type fpu_restore,@function
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fpu_restore:
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mov epsw,d1
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or EPSW_FE,epsw /* enable the FPU so we can access it */
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#ifdef CONFIG_MN10300_PROC_MN103E010
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nop
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nop
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#endif
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mov d0,a0
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fmov (a0+),fs0
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fmov (a0+),fs1
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fmov (a0+),fs2
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fmov (a0+),fs3
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fmov (a0+),fs4
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fmov (a0+),fs5
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fmov (a0+),fs6
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fmov (a0+),fs7
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fmov (a0+),fs8
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fmov (a0+),fs9
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fmov (a0+),fs10
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fmov (a0+),fs11
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fmov (a0+),fs12
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fmov (a0+),fs13
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fmov (a0+),fs14
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fmov (a0+),fs15
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fmov (a0+),fs16
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fmov (a0+),fs17
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fmov (a0+),fs18
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fmov (a0+),fs19
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fmov (a0+),fs20
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fmov (a0+),fs21
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fmov (a0+),fs22
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fmov (a0+),fs23
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fmov (a0+),fs24
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fmov (a0+),fs25
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fmov (a0+),fs26
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fmov (a0+),fs27
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fmov (a0+),fs28
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fmov (a0+),fs29
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fmov (a0+),fs30
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fmov (a0+),fs31
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mov (a0),d0
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fmov d0,fpcr
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#ifdef CONFIG_MN10300_PROC_MN103E010
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nop
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nop
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nop
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#endif
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mov d1,epsw
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ret [],0
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.size fpu_restore,.-fpu_restore
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