diff options
Diffstat (limited to 'arch/mn10300/kernel/fpu-low.S')
| -rw-r--r-- | arch/mn10300/kernel/fpu-low.S | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/arch/mn10300/kernel/fpu-low.S b/arch/mn10300/kernel/fpu-low.S deleted file mode 100644 index 78df25cfae29..000000000000 --- a/arch/mn10300/kernel/fpu-low.S +++ /dev/null @@ -1,258 +0,0 @@ -/* MN10300 Low level FPU management operations - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#include <linux/linkage.h> -#include <asm/cpu-regs.h> -#include <asm/smp.h> -#include <asm/thread_info.h> -#include <asm/asm-offsets.h> -#include <asm/frame.inc> - -.macro FPU_INIT_STATE_ALL - fmov 0,fs0 - fmov fs0,fs1 - fmov fs0,fs2 - fmov fs0,fs3 - fmov fs0,fs4 - fmov fs0,fs5 - fmov fs0,fs6 - fmov fs0,fs7 - fmov fs0,fs8 - fmov fs0,fs9 - fmov fs0,fs10 - fmov fs0,fs11 - fmov fs0,fs12 - fmov fs0,fs13 - fmov fs0,fs14 - fmov fs0,fs15 - fmov fs0,fs16 - fmov fs0,fs17 - fmov fs0,fs18 - fmov fs0,fs19 - fmov fs0,fs20 - fmov fs0,fs21 - fmov fs0,fs22 - fmov fs0,fs23 - fmov fs0,fs24 - fmov fs0,fs25 - fmov fs0,fs26 - fmov fs0,fs27 - fmov fs0,fs28 - fmov fs0,fs29 - fmov fs0,fs30 - fmov fs0,fs31 - fmov FPCR_INIT,fpcr -.endm - -.macro FPU_SAVE_ALL areg,dreg - fmov fs0,(\areg+) - fmov fs1,(\areg+) - fmov fs2,(\areg+) - fmov fs3,(\areg+) - fmov fs4,(\areg+) - fmov fs5,(\areg+) - fmov fs6,(\areg+) - fmov fs7,(\areg+) - fmov fs8,(\areg+) - fmov fs9,(\areg+) - fmov fs10,(\areg+) - fmov fs11,(\areg+) - fmov fs12,(\areg+) - fmov fs13,(\areg+) - fmov fs14,(\areg+) - fmov fs15,(\areg+) - fmov fs16,(\areg+) - fmov fs17,(\areg+) - fmov fs18,(\areg+) - fmov fs19,(\areg+) - fmov fs20,(\areg+) - fmov fs21,(\areg+) - fmov fs22,(\areg+) - fmov fs23,(\areg+) - fmov fs24,(\areg+) - fmov fs25,(\areg+) - fmov fs26,(\areg+) - fmov fs27,(\areg+) - fmov fs28,(\areg+) - fmov fs29,(\areg+) - fmov fs30,(\areg+) - fmov fs31,(\areg+) - fmov fpcr,\dreg - mov \dreg,(\areg) -.endm - -.macro FPU_RESTORE_ALL areg,dreg - fmov (\areg+),fs0 - fmov (\areg+),fs1 - fmov (\areg+),fs2 - fmov (\areg+),fs3 - fmov (\areg+),fs4 - fmov (\areg+),fs5 - fmov (\areg+),fs6 - fmov (\areg+),fs7 - fmov (\areg+),fs8 - fmov (\areg+),fs9 - fmov (\areg+),fs10 - fmov (\areg+),fs11 - fmov (\areg+),fs12 - fmov (\areg+),fs13 - fmov (\areg+),fs14 - fmov (\areg+),fs15 - fmov (\areg+),fs16 - fmov (\areg+),fs17 - fmov (\areg+),fs18 - fmov (\areg+),fs19 - fmov (\areg+),fs20 - fmov (\areg+),fs21 - fmov (\areg+),fs22 - fmov (\areg+),fs23 - fmov (\areg+),fs24 - fmov (\areg+),fs25 - fmov (\areg+),fs26 - fmov (\areg+),fs27 - fmov (\areg+),fs28 - fmov (\areg+),fs29 - fmov (\areg+),fs30 - fmov (\areg+),fs31 - mov (\areg),\dreg - fmov \dreg,fpcr -.endm - -############################################################################### -# -# void fpu_init_state(void) -# - initialise the FPU -# -############################################################################### - .globl fpu_init_state - .type fpu_init_state,@function -fpu_init_state: - mov epsw,d0 - or EPSW_FE,epsw - -#ifdef CONFIG_MN10300_PROC_MN103E010 - nop - nop - nop -#endif - FPU_INIT_STATE_ALL -#ifdef CONFIG_MN10300_PROC_MN103E010 - nop - nop - nop -#endif - mov d0,epsw - ret [],0 - - .size fpu_init_state,.-fpu_init_state - -############################################################################### -# -# void fpu_save(struct fpu_state_struct *) -# - save the fpu state -# - note that an FPU Operational exception might occur during this process -# -############################################################################### - .globl fpu_save - .type fpu_save,@function -fpu_save: - mov epsw,d1 - or EPSW_FE,epsw /* enable the FPU so we can access it */ - -#ifdef CONFIG_MN10300_PROC_MN103E010 - nop - nop -#endif - mov d0,a0 - FPU_SAVE_ALL a0,d0 -#ifdef CONFIG_MN10300_PROC_MN103E010 - nop - nop -#endif - - mov d1,epsw - ret [],0 - - .size fpu_save,.-fpu_save - -############################################################################### -# -# void fpu_disabled(void) -# - handle an exception due to the FPU being disabled -# when CONFIG_FPU is enabled -# -############################################################################### - .type fpu_disabled,@function - .globl fpu_disabled -fpu_disabled: - or EPSW_nAR|EPSW_FE,epsw - nop - nop - nop - - mov sp,a1 - mov (a1),d1 /* get epsw of user context */ - and ~(THREAD_SIZE-1),a1 /* a1: (thread_info *ti) */ - mov (TI_task,a1),a2 /* a2: (task_struct *tsk) */ - btst EPSW_nSL,d1 - beq fpu_used_in_kernel - - or EPSW_FE,d1 - mov d1,(sp) - mov (TASK_THREAD+THREAD_FPU_FLAGS,a2),d1 -#ifndef CONFIG_LAZY_SAVE_FPU - or __THREAD_HAS_FPU,d1 - mov d1,(TASK_THREAD+THREAD_FPU_FLAGS,a2) -#else /* !CONFIG_LAZY_SAVE_FPU */ - mov (fpu_state_owner),a0 - cmp 0,a0 - beq fpu_regs_save_end - - mov (TASK_THREAD+THREAD_UREGS,a0),a1 - add TASK_THREAD+THREAD_FPU_STATE,a0 - FPU_SAVE_ALL a0,d0 - - mov (REG_EPSW,a1),d0 - and ~EPSW_FE,d0 - mov d0,(REG_EPSW,a1) - -fpu_regs_save_end: - mov a2,(fpu_state_owner) -#endif /* !CONFIG_LAZY_SAVE_FPU */ - - btst __THREAD_USING_FPU,d1 - beq fpu_regs_init - add TASK_THREAD+THREAD_FPU_STATE,a2 - FPU_RESTORE_ALL a2,d0 - rti - -fpu_regs_init: - FPU_INIT_STATE_ALL - add TASK_THREAD+THREAD_FPU_FLAGS,a2 - bset __THREAD_USING_FPU,(0,a2) - rti - -fpu_used_in_kernel: - and ~(EPSW_nAR|EPSW_FE),epsw - nop - nop - - add -4,sp - SAVE_ALL - mov -1,d0 - mov d0,(REG_ORIG_D0,fp) - - and ~EPSW_NMID,epsw - - mov fp,d0 - call fpu_disabled_in_kernel[],0 - jmp ret_from_exception - - .size fpu_disabled,.-fpu_disabled |