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-rw-r--r--arch/mn10300/kernel/fpu-low.S265
1 files changed, 163 insertions, 102 deletions
diff --git a/arch/mn10300/kernel/fpu-low.S b/arch/mn10300/kernel/fpu-low.S
index 96cfd47e68d5..78df25cfae29 100644
--- a/arch/mn10300/kernel/fpu-low.S
+++ b/arch/mn10300/kernel/fpu-low.S
@@ -8,25 +8,14 @@
8 * as published by the Free Software Foundation; either version 8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version. 9 * 2 of the Licence, or (at your option) any later version.
10 */ 10 */
11#include <linux/linkage.h>
11#include <asm/cpu-regs.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>
12 17
13############################################################################### 18.macro FPU_INIT_STATE_ALL
14#
15# void fpu_init_state(void)
16# - initialise the FPU
17#
18###############################################################################
19 .globl fpu_init_state
20 .type fpu_init_state,@function
21fpu_init_state:
22 mov epsw,d0
23 or EPSW_FE,epsw
24
25#ifdef CONFIG_MN10300_PROC_MN103E010
26 nop
27 nop
28 nop
29#endif
30 fmov 0,fs0 19 fmov 0,fs0
31 fmov fs0,fs1 20 fmov fs0,fs1
32 fmov fs0,fs2 21 fmov fs0,fs2
@@ -60,7 +49,100 @@ fpu_init_state:
60 fmov fs0,fs30 49 fmov fs0,fs30
61 fmov fs0,fs31 50 fmov fs0,fs31
62 fmov FPCR_INIT,fpcr 51 fmov FPCR_INIT,fpcr
52.endm
53
54.macro FPU_SAVE_ALL areg,dreg
55 fmov fs0,(\areg+)
56 fmov fs1,(\areg+)
57 fmov fs2,(\areg+)
58 fmov fs3,(\areg+)
59 fmov fs4,(\areg+)
60 fmov fs5,(\areg+)
61 fmov fs6,(\areg+)
62 fmov fs7,(\areg+)
63 fmov fs8,(\areg+)
64 fmov fs9,(\areg+)
65 fmov fs10,(\areg+)
66 fmov fs11,(\areg+)
67 fmov fs12,(\areg+)
68 fmov fs13,(\areg+)
69 fmov fs14,(\areg+)
70 fmov fs15,(\areg+)
71 fmov fs16,(\areg+)
72 fmov fs17,(\areg+)
73 fmov fs18,(\areg+)
74 fmov fs19,(\areg+)
75 fmov fs20,(\areg+)
76 fmov fs21,(\areg+)
77 fmov fs22,(\areg+)
78 fmov fs23,(\areg+)
79 fmov fs24,(\areg+)
80 fmov fs25,(\areg+)
81 fmov fs26,(\areg+)
82 fmov fs27,(\areg+)
83 fmov fs28,(\areg+)
84 fmov fs29,(\areg+)
85 fmov fs30,(\areg+)
86 fmov fs31,(\areg+)
87 fmov fpcr,\dreg
88 mov \dreg,(\areg)
89.endm
90
91.macro FPU_RESTORE_ALL areg,dreg
92 fmov (\areg+),fs0
93 fmov (\areg+),fs1
94 fmov (\areg+),fs2
95 fmov (\areg+),fs3
96 fmov (\areg+),fs4
97 fmov (\areg+),fs5
98 fmov (\areg+),fs6
99 fmov (\areg+),fs7
100 fmov (\areg+),fs8
101 fmov (\areg+),fs9
102 fmov (\areg+),fs10
103 fmov (\areg+),fs11
104 fmov (\areg+),fs12
105 fmov (\areg+),fs13
106 fmov (\areg+),fs14
107 fmov (\areg+),fs15
108 fmov (\areg+),fs16
109 fmov (\areg+),fs17
110 fmov (\areg+),fs18
111 fmov (\areg+),fs19
112 fmov (\areg+),fs20
113 fmov (\areg+),fs21
114 fmov (\areg+),fs22
115 fmov (\areg+),fs23
116 fmov (\areg+),fs24
117 fmov (\areg+),fs25
118 fmov (\areg+),fs26
119 fmov (\areg+),fs27
120 fmov (\areg+),fs28
121 fmov (\areg+),fs29
122 fmov (\areg+),fs30
123 fmov (\areg+),fs31
124 mov (\areg),\dreg
125 fmov \dreg,fpcr
126.endm
63 127
128###############################################################################
129#
130# void fpu_init_state(void)
131# - initialise the FPU
132#
133###############################################################################
134 .globl fpu_init_state
135 .type fpu_init_state,@function
136fpu_init_state:
137 mov epsw,d0
138 or EPSW_FE,epsw
139
140#ifdef CONFIG_MN10300_PROC_MN103E010
141 nop
142 nop
143 nop
144#endif
145 FPU_INIT_STATE_ALL
64#ifdef CONFIG_MN10300_PROC_MN103E010 146#ifdef CONFIG_MN10300_PROC_MN103E010
65 nop 147 nop
66 nop 148 nop
@@ -89,40 +171,7 @@ fpu_save:
89 nop 171 nop
90#endif 172#endif
91 mov d0,a0 173 mov d0,a0
92 fmov fs0,(a0+) 174 FPU_SAVE_ALL a0,d0
93 fmov fs1,(a0+)
94 fmov fs2,(a0+)
95 fmov fs3,(a0+)
96 fmov fs4,(a0+)
97 fmov fs5,(a0+)
98 fmov fs6,(a0+)
99 fmov fs7,(a0+)
100 fmov fs8,(a0+)
101 fmov fs9,(a0+)
102 fmov fs10,(a0+)
103 fmov fs11,(a0+)
104 fmov fs12,(a0+)
105 fmov fs13,(a0+)
106 fmov fs14,(a0+)
107 fmov fs15,(a0+)
108 fmov fs16,(a0+)
109 fmov fs17,(a0+)
110 fmov fs18,(a0+)
111 fmov fs19,(a0+)
112 fmov fs20,(a0+)
113 fmov fs21,(a0+)
114 fmov fs22,(a0+)
115 fmov fs23,(a0+)
116 fmov fs24,(a0+)
117 fmov fs25,(a0+)
118 fmov fs26,(a0+)
119 fmov fs27,(a0+)
120 fmov fs28,(a0+)
121 fmov fs29,(a0+)
122 fmov fs30,(a0+)
123 fmov fs31,(a0+)
124 fmov fpcr,d0
125 mov d0,(a0)
126#ifdef CONFIG_MN10300_PROC_MN103E010 175#ifdef CONFIG_MN10300_PROC_MN103E010
127 nop 176 nop
128 nop 177 nop
@@ -135,63 +184,75 @@ fpu_save:
135 184
136############################################################################### 185###############################################################################
137# 186#
138# void fpu_restore(struct fpu_state_struct *) 187# void fpu_disabled(void)
139# - restore the fpu state 188# - handle an exception due to the FPU being disabled
140# - note that an FPU Operational exception might occur during this process 189# when CONFIG_FPU is enabled
141# 190#
142############################################################################### 191###############################################################################
143 .globl fpu_restore 192 .type fpu_disabled,@function
144 .type fpu_restore,@function 193 .globl fpu_disabled
145fpu_restore: 194fpu_disabled:
146 mov epsw,d1 195 or EPSW_nAR|EPSW_FE,epsw
147 or EPSW_FE,epsw /* enable the FPU so we can access it */
148
149#ifdef CONFIG_MN10300_PROC_MN103E010
150 nop 196 nop
151 nop 197 nop
152#endif
153 mov d0,a0
154 fmov (a0+),fs0
155 fmov (a0+),fs1
156 fmov (a0+),fs2
157 fmov (a0+),fs3
158 fmov (a0+),fs4
159 fmov (a0+),fs5
160 fmov (a0+),fs6
161 fmov (a0+),fs7
162 fmov (a0+),fs8
163 fmov (a0+),fs9
164 fmov (a0+),fs10
165 fmov (a0+),fs11
166 fmov (a0+),fs12
167 fmov (a0+),fs13
168 fmov (a0+),fs14
169 fmov (a0+),fs15
170 fmov (a0+),fs16
171 fmov (a0+),fs17
172 fmov (a0+),fs18
173 fmov (a0+),fs19
174 fmov (a0+),fs20
175 fmov (a0+),fs21
176 fmov (a0+),fs22
177 fmov (a0+),fs23
178 fmov (a0+),fs24
179 fmov (a0+),fs25
180 fmov (a0+),fs26
181 fmov (a0+),fs27
182 fmov (a0+),fs28
183 fmov (a0+),fs29
184 fmov (a0+),fs30
185 fmov (a0+),fs31
186 mov (a0),d0
187 fmov d0,fpcr
188#ifdef CONFIG_MN10300_PROC_MN103E010
189 nop 198 nop
199
200 mov sp,a1
201 mov (a1),d1 /* get epsw of user context */
202 and ~(THREAD_SIZE-1),a1 /* a1: (thread_info *ti) */
203 mov (TI_task,a1),a2 /* a2: (task_struct *tsk) */
204 btst EPSW_nSL,d1
205 beq fpu_used_in_kernel
206
207 or EPSW_FE,d1
208 mov d1,(sp)
209 mov (TASK_THREAD+THREAD_FPU_FLAGS,a2),d1
210#ifndef CONFIG_LAZY_SAVE_FPU
211 or __THREAD_HAS_FPU,d1
212 mov d1,(TASK_THREAD+THREAD_FPU_FLAGS,a2)
213#else /* !CONFIG_LAZY_SAVE_FPU */
214 mov (fpu_state_owner),a0
215 cmp 0,a0
216 beq fpu_regs_save_end
217
218 mov (TASK_THREAD+THREAD_UREGS,a0),a1
219 add TASK_THREAD+THREAD_FPU_STATE,a0
220 FPU_SAVE_ALL a0,d0
221
222 mov (REG_EPSW,a1),d0
223 and ~EPSW_FE,d0
224 mov d0,(REG_EPSW,a1)
225
226fpu_regs_save_end:
227 mov a2,(fpu_state_owner)
228#endif /* !CONFIG_LAZY_SAVE_FPU */
229
230 btst __THREAD_USING_FPU,d1
231 beq fpu_regs_init
232 add TASK_THREAD+THREAD_FPU_STATE,a2
233 FPU_RESTORE_ALL a2,d0
234 rti
235
236fpu_regs_init:
237 FPU_INIT_STATE_ALL
238 add TASK_THREAD+THREAD_FPU_FLAGS,a2
239 bset __THREAD_USING_FPU,(0,a2)
240 rti
241
242fpu_used_in_kernel:
243 and ~(EPSW_nAR|EPSW_FE),epsw
190 nop 244 nop
191 nop 245 nop
192#endif
193 246
194 mov d1,epsw 247 add -4,sp
195 ret [],0 248 SAVE_ALL
249 mov -1,d0
250 mov d0,(REG_ORIG_D0,fp)
251
252 and ~EPSW_NMID,epsw
253
254 mov fp,d0
255 call fpu_disabled_in_kernel[],0
256 jmp ret_from_exception
196 257
197 .size fpu_restore,.-fpu_restore 258 .size fpu_disabled,.-fpu_disabled
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 20:25:52 -0500