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1 jermar 1
#
2071 jermar 2
# Copyright (c) 2003-2004 Jakub Jermar
1 jermar 3
# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# - Redistributions of source code must retain the above copyright
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#   notice, this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
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#   notice, this list of conditions and the following disclaimer in the
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#   documentation and/or other materials provided with the distribution.
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# - The name of the author may not be used to endorse or promote products
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#   derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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326 palkovsky 29
#include <arch/asm/regname.h>
4055 trochtova 30
 
1 jermar 31
.text
32
 
33
.macro cp0_read reg
4055 trochtova 34
	mfc0 $2, \reg
50 jermar 35
	j $31
36
	nop
1 jermar 37
.endm
38
 
39
.macro cp0_write reg
4055 trochtova 40
	mtc0 $4, \reg
50 jermar 41
	j $31
42
	nop
1 jermar 43
.endm
44
 
45
.set noat
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.set noreorder
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.set nomacro
48
 
4055 trochtova 49
.global asm_delay_loop
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asm_delay_loop:
51
	j $31
52
	nop
53
 
1 jermar 54
.global cpu_halt
55
cpu_halt:
56
	j cpu_halt
57
	nop
58
 
59
 
59 jermar 60
.global memsetb
61
memsetb:
62
	j _memsetb
63
	nop
64
 
1288 jermar 65
 
4296 trochtova 66
.global memsetw
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memsetw:
68
	j _memsetw
69
	nop
70
 
71
 
205 jermar 72
.global memcpy
1288 jermar 73
.global memcpy_from_uspace
74
.global memcpy_to_uspace
75
.global memcpy_from_uspace_failover_address
76
.global memcpy_to_uspace_failover_address
205 jermar 77
memcpy:
1288 jermar 78
memcpy_from_uspace:
79
memcpy_to_uspace:
4055 trochtova 80
	move $t2, $a0      # save dst
81
 
82
	addiu $v0, $a1, 3
83
	li $v1, -4         # 0xfffffffffffffffc
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	and $v0, $v0, $v1
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	beq $a1, $v0, 3f
86
	move $t0, $a0
87
 
88
	0:
89
		beq $a2, $zero, 2f
90
		move $a3, $zero
91
 
92
	1:
93
		addu $v0, $a1, $a3
94
		lbu $a0, 0($v0)
95
		addu $v1, $t0, $a3
96
		addiu $a3, $a3, 1
97
		bne $a3, $a2, 1b
98
		sb $a0, 0($v1)
99
 
100
	2:
101
		jr $ra
102
		move $v0, $t2
103
 
104
	3:
105
		addiu $v0, $a0, 3
106
		and $v0, $v0, $v1
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		bne $a0, $v0, 0b
108
		srl $t1, $a2, 2
109
 
110
		beq $t1, $zero, 5f
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		move $a3, $zero
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113
		move $a3, $zero
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		move $a0, $zero
115
 
116
	4:
117
		addu $v0, $a1, $a0
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		lw $v1, 0($v0)
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		addiu $a3, $a3, 1
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		addu $v0, $t0, $a0
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		sw $v1, 0($v0)
122
		bne $a3, $t1, 4b
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		addiu $a0, $a0, 4
124
 
125
	5:
126
		andi $a2, $a2, 0x3
127
		beq $a2, $zero, 2b
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		nop
129
 
130
		sll $v0, $a3, 2
131
		addu $t1, $v0, $t0
132
		move $a3, $zero
133
		addu $t0, $v0, $a1
134
 
135
	6:
136
		addu $v0, $t0, $a3
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		lbu $a0, 0($v0)
138
		addu $v1, $t1, $a3
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		addiu $a3, $a3, 1
140
		bne $a3, $a2, 6b
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		sb $a0, 0($v1)
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143
		jr $ra
144
		move $v0, $t2
105 jermar 145
 
1288 jermar 146
memcpy_from_uspace_failover_address:
147
memcpy_to_uspace_failover_address:
4055 trochtova 148
	jr $ra
149
	move $v0, $zero
1288 jermar 150
 
151
 
152
 
326 palkovsky 153
.macro fpu_gp_save reg ctx
4055 trochtova 154
	mfc1 $t0, $\reg
155
	sw $t0, \reg * 4(\ctx)
326 palkovsky 156
.endm
157
 
158
.macro fpu_gp_restore reg ctx
4055 trochtova 159
	lw $t0, \reg * 4(\ctx)
160
	mtc1 $t0, $\reg
326 palkovsky 161
.endm
162
 
163
.macro fpu_ct_save reg ctx
4055 trochtova 164
	cfc1 $t0, $1
165
	sw $t0, (\reg + 32) * 4(\ctx)
326 palkovsky 166
.endm	
167
 
168
.macro fpu_ct_restore reg ctx
4055 trochtova 169
	lw $t0, (\reg + 32) * 4(\ctx)
170
	ctc1 $t0, $\reg
326 palkovsky 171
.endm
172
 
173
 
174
.global fpu_context_save
175
fpu_context_save:
4055 trochtova 176
#ifdef CONFIG_FPU
177
	fpu_gp_save 0, $a0
178
	fpu_gp_save 1, $a0
179
	fpu_gp_save 2, $a0
180
	fpu_gp_save 3, $a0
181
	fpu_gp_save 4, $a0
182
	fpu_gp_save 5, $a0
183
	fpu_gp_save 6, $a0
184
	fpu_gp_save 7, $a0
185
	fpu_gp_save 8, $a0
186
	fpu_gp_save 9, $a0
187
	fpu_gp_save 10, $a0
188
	fpu_gp_save 11, $a0
189
	fpu_gp_save 12, $a0
190
	fpu_gp_save 13, $a0
191
	fpu_gp_save 14, $a0
192
	fpu_gp_save 15, $a0
193
	fpu_gp_save 16, $a0
194
	fpu_gp_save 17, $a0
195
	fpu_gp_save 18, $a0
196
	fpu_gp_save 19, $a0
197
	fpu_gp_save 20, $a0
198
	fpu_gp_save 21, $a0
199
	fpu_gp_save 22, $a0
200
	fpu_gp_save 23, $a0
201
	fpu_gp_save 24, $a0
202
	fpu_gp_save 25, $a0
203
	fpu_gp_save 26, $a0
204
	fpu_gp_save 27, $a0
205
	fpu_gp_save 28, $a0
206
	fpu_gp_save 29, $a0
207
	fpu_gp_save 30, $a0
208
	fpu_gp_save 31, $a0
209
 
210
	fpu_ct_save 1, $a0
211
	fpu_ct_save 2, $a0
212
	fpu_ct_save 3, $a0
213
	fpu_ct_save 4, $a0
214
	fpu_ct_save 5, $a0
215
	fpu_ct_save 6, $a0
216
	fpu_ct_save 7, $a0
217
	fpu_ct_save 8, $a0
218
	fpu_ct_save 9, $a0
219
	fpu_ct_save 10, $a0
220
	fpu_ct_save 11, $a0
221
	fpu_ct_save 12, $a0
222
	fpu_ct_save 13, $a0
223
	fpu_ct_save 14, $a0
224
	fpu_ct_save 15, $a0
225
	fpu_ct_save 16, $a0
226
	fpu_ct_save 17, $a0
227
	fpu_ct_save 18, $a0
228
	fpu_ct_save 19, $a0
229
	fpu_ct_save 20, $a0
230
	fpu_ct_save 21, $a0
231
	fpu_ct_save 22, $a0
232
	fpu_ct_save 23, $a0
233
	fpu_ct_save 24, $a0
234
	fpu_ct_save 25, $a0
235
	fpu_ct_save 26, $a0
236
	fpu_ct_save 27, $a0
237
	fpu_ct_save 28, $a0
238
	fpu_ct_save 29, $a0
239
	fpu_ct_save 30, $a0
240
	fpu_ct_save 31, $a0
241
#endif
326 palkovsky 242
	j $ra
243
	nop
244
 
245
.global fpu_context_restore
246
fpu_context_restore:
4055 trochtova 247
#ifdef CONFIG_FPU
248
	fpu_gp_restore 0, $a0
249
	fpu_gp_restore 1, $a0
250
	fpu_gp_restore 2, $a0
251
	fpu_gp_restore 3, $a0
252
	fpu_gp_restore 4, $a0
253
	fpu_gp_restore 5, $a0
254
	fpu_gp_restore 6, $a0
255
	fpu_gp_restore 7, $a0
256
	fpu_gp_restore 8, $a0
257
	fpu_gp_restore 9, $a0
258
	fpu_gp_restore 10, $a0
259
	fpu_gp_restore 11, $a0
260
	fpu_gp_restore 12, $a0
261
	fpu_gp_restore 13, $a0
262
	fpu_gp_restore 14, $a0
263
	fpu_gp_restore 15, $a0
264
	fpu_gp_restore 16, $a0
265
	fpu_gp_restore 17, $a0
266
	fpu_gp_restore 18, $a0
267
	fpu_gp_restore 19, $a0
268
	fpu_gp_restore 20, $a0
269
	fpu_gp_restore 21, $a0
270
	fpu_gp_restore 22, $a0
271
	fpu_gp_restore 23, $a0
272
	fpu_gp_restore 24, $a0
273
	fpu_gp_restore 25, $a0
274
	fpu_gp_restore 26, $a0
275
	fpu_gp_restore 27, $a0
276
	fpu_gp_restore 28, $a0
277
	fpu_gp_restore 29, $a0
278
	fpu_gp_restore 30, $a0
279
	fpu_gp_restore 31, $a0
280
 
281
	fpu_ct_restore 1, $a0
282
	fpu_ct_restore 2, $a0
283
	fpu_ct_restore 3, $a0
284
	fpu_ct_restore 4, $a0
285
	fpu_ct_restore 5, $a0
286
	fpu_ct_restore 6, $a0
287
	fpu_ct_restore 7, $a0
288
	fpu_ct_restore 8, $a0
289
	fpu_ct_restore 9, $a0
290
	fpu_ct_restore 10, $a0
291
	fpu_ct_restore 11, $a0
292
	fpu_ct_restore 12, $a0
293
	fpu_ct_restore 13, $a0
294
	fpu_ct_restore 14, $a0
295
	fpu_ct_restore 15, $a0
296
	fpu_ct_restore 16, $a0
297
	fpu_ct_restore 17, $a0
298
	fpu_ct_restore 18, $a0
299
	fpu_ct_restore 19, $a0
300
	fpu_ct_restore 20, $a0
301
	fpu_ct_restore 21, $a0
302
	fpu_ct_restore 22, $a0
303
	fpu_ct_restore 23, $a0
304
	fpu_ct_restore 24, $a0
305
	fpu_ct_restore 25, $a0
306
	fpu_ct_restore 26, $a0
307
	fpu_ct_restore 27, $a0
308
	fpu_ct_restore 28, $a0
309
	fpu_ct_restore 29, $a0
310
	fpu_ct_restore 30, $a0
311
	fpu_ct_restore 31, $a0
312
#endif
326 palkovsky 313
	j $ra
314
	nop