summaryrefslogtreecommitdiff
path: root/arch/csky/abiv2/inc/abi/entry.h
blob: 6ee71bfc512a88dc0d211f778f05d40fb0b6bfc2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.

#ifndef __ASM_CSKY_ENTRY_H
#define __ASM_CSKY_ENTRY_H

#include <asm/setup.h>
#include <abi/regdef.h>

#define LSAVE_PC	8
#define LSAVE_PSR	12
#define LSAVE_A0	24
#define LSAVE_A1	28
#define LSAVE_A2	32
#define LSAVE_A3	36
#define LSAVE_A4	40
#define LSAVE_A5	44

#define KSPTOUSP
#define USPTOKSP

#define usp cr<14, 1>

.macro SAVE_ALL epc_inc
	subi    sp, 152
	stw	tls, (sp, 0)
	stw	lr, (sp, 4)

	mfcr	lr, epc
	movi	tls, \epc_inc
	add	lr, tls
	stw	lr, (sp, 8)

	mfcr	lr, epsr
	stw	lr, (sp, 12)
	btsti   lr, 31
	bf      1f
	addi    lr, sp, 152
	br	2f
1:
	mfcr	lr, usp
2:
	stw	lr, (sp, 16)

	stw     a0, (sp, 20)
	stw     a0, (sp, 24)
	stw     a1, (sp, 28)
	stw     a2, (sp, 32)
	stw     a3, (sp, 36)

	addi	sp, 40
	stm	r4-r13, (sp)

	addi    sp, 40
	stm     r16-r30, (sp)
#ifdef CONFIG_CPU_HAS_HILO
	mfhi	lr
	stw	lr, (sp, 60)
	mflo	lr
	stw	lr, (sp, 64)
	mfcr	lr, cr14
	stw	lr, (sp, 68)
#endif
	subi	sp, 80
.endm

.macro	RESTORE_ALL
	ldw	tls, (sp, 0)
	ldw	lr, (sp, 4)
	ldw	a0, (sp, 8)
	mtcr	a0, epc
	ldw	a0, (sp, 12)
	mtcr	a0, epsr
	btsti   a0, 31
	ldw	a0, (sp, 16)
	mtcr	a0, usp
	mtcr	a0, ss0

#ifdef CONFIG_CPU_HAS_HILO
	ldw	a0, (sp, 140)
	mthi	a0
	ldw	a0, (sp, 144)
	mtlo	a0
	ldw	a0, (sp, 148)
	mtcr	a0, cr14
#endif

	ldw     a0, (sp, 24)
	ldw     a1, (sp, 28)
	ldw     a2, (sp, 32)
	ldw     a3, (sp, 36)

	addi	sp, 40
	ldm	r4-r13, (sp)
	addi    sp, 40
	ldm     r16-r30, (sp)
	addi    sp, 72
	bf	1f
	mfcr	sp, ss0
1:
	rte
.endm

.macro SAVE_REGS_FTRACE
	subi    sp, 152
	stw	tls, (sp, 0)
	stw	lr, (sp, 4)

	mfcr	lr, psr
	stw	lr, (sp, 12)

	addi    lr, sp, 152
	stw	lr, (sp, 16)

	stw     a0, (sp, 20)
	stw     a0, (sp, 24)
	stw     a1, (sp, 28)
	stw     a2, (sp, 32)
	stw     a3, (sp, 36)

	addi	sp, 40
	stm	r4-r13, (sp)

	addi    sp, 40
	stm     r16-r30, (sp)
#ifdef CONFIG_CPU_HAS_HILO
	mfhi	lr
	stw	lr, (sp, 60)
	mflo	lr
	stw	lr, (sp, 64)
	mfcr	lr, cr14
	stw	lr, (sp, 68)
#endif
	subi	sp, 80
.endm

.macro	RESTORE_REGS_FTRACE
	ldw	tls, (sp, 0)
	ldw	a0, (sp, 16)
	mtcr	a0, ss0

#ifdef CONFIG_CPU_HAS_HILO
	ldw	a0, (sp, 140)
	mthi	a0
	ldw	a0, (sp, 144)
	mtlo	a0
	ldw	a0, (sp, 148)
	mtcr	a0, cr14
#endif

	ldw     a0, (sp, 24)
	ldw     a1, (sp, 28)
	ldw     a2, (sp, 32)
	ldw     a3, (sp, 36)

	addi	sp, 40
	ldm	r4-r13, (sp)
	addi    sp, 40
	ldm     r16-r30, (sp)
	addi    sp, 72
	mfcr	sp, ss0
.endm

.macro SAVE_SWITCH_STACK
	subi    sp, 64
	stm	r4-r11, (sp)
	stw	lr,  (sp, 32)
	stw	r16, (sp, 36)
	stw	r17, (sp, 40)
	stw	r26, (sp, 44)
	stw	r27, (sp, 48)
	stw	r28, (sp, 52)
	stw	r29, (sp, 56)
	stw	r30, (sp, 60)
#ifdef CONFIG_CPU_HAS_HILO
	subi	sp, 16
	mfhi	lr
	stw	lr, (sp, 0)
	mflo	lr
	stw	lr, (sp, 4)
	mfcr	lr, cr14
	stw	lr, (sp, 8)
#endif
.endm

.macro RESTORE_SWITCH_STACK
#ifdef CONFIG_CPU_HAS_HILO
	ldw	lr, (sp, 0)
	mthi	lr
	ldw	lr, (sp, 4)
	mtlo	lr
	ldw	lr, (sp, 8)
	mtcr	lr, cr14
	addi	sp, 16
#endif
	ldm	r4-r11, (sp)
	ldw	lr,  (sp, 32)
	ldw	r16, (sp, 36)
	ldw	r17, (sp, 40)
	ldw	r26, (sp, 44)
	ldw	r27, (sp, 48)
	ldw	r28, (sp, 52)
	ldw	r29, (sp, 56)
	ldw	r30, (sp, 60)
	addi	sp, 64
.endm

/* MMU registers operators. */
.macro RD_MIR rx
	mfcr	\rx, cr<0, 15>
.endm

.macro RD_MEH rx
	mfcr	\rx, cr<4, 15>
.endm

.macro RD_MCIR rx
	mfcr	\rx, cr<8, 15>
.endm

.macro RD_PGDR rx
	mfcr	\rx, cr<29, 15>
.endm

.macro RD_PGDR_K rx
	mfcr	\rx, cr<28, 15>
.endm

.macro WR_MEH rx
	mtcr	\rx, cr<4, 15>
.endm

.macro WR_MCIR rx
	mtcr	\rx, cr<8, 15>
.endm

.macro SETUP_MMU
	/* Init psr and enable ee */
	lrw	r6, DEFAULT_PSR_VALUE
	mtcr    r6, psr
	psrset  ee

	/* Invalid I/Dcache BTB BHT */
	movi	r6, 7
	lsli	r6, 16
	addi	r6, (1<<4) | 3
	mtcr	r6, cr17

	/* Invalid all TLB */
	bgeni   r6, 26
	mtcr	r6, cr<8, 15> /* Set MCIR */

	/* Check MMU on/off */
	mfcr	r6, cr18
	btsti	r6, 0
	bt	1f

	/* MMU off: setup mapping tlb entry */
	movi	r6, 0
	mtcr	r6, cr<6, 15> /* Set MPR with 4K page size */

	grs	r6, 1f /* Get current pa by PC */
	bmaski  r7, (PAGE_SHIFT + 1) /* r7 = 0x1fff */
	andn    r6, r7
	mtcr	r6, cr<4, 15> /* Set MEH */

	mov	r8, r6
	movi    r7, 0x00000006
	or      r8, r7
	mtcr	r8, cr<2, 15> /* Set MEL0 */
	movi    r7, 0x00001006
	or      r8, r7
	mtcr	r8, cr<3, 15> /* Set MEL1 */

	bgeni   r8, 28
	mtcr	r8, cr<8, 15> /* Set MCIR to write TLB */

	br	2f
1:
	/*
	 * MMU on: use origin MSA value from bootloader
	 *
	 * cr<30/31, 15> MSA register format:
	 * 31 - 29 | 28 - 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
	 *   BA     Reserved  SH  WA  B   SO SEC  C   D   V
	 */
	mfcr	r6, cr<30, 15> /* Get MSA0 */
2:
	lsri	r6, 29
	lsli	r6, 29
	addi	r6, 0x1ce
	mtcr	r6, cr<30, 15> /* Set MSA0 */

	movi    r6, 0
	mtcr	r6, cr<31, 15> /* Clr MSA1 */

	/* enable MMU */
	mfcr    r6, cr18
	bseti	r6, 0
	mtcr    r6, cr18

	jmpi	3f /* jump to va */
3:
.endm

.macro ANDI_R3 rx, imm
	lsri	\rx, 3
	andi	\rx, (\imm >> 3)
.endm
#endif /* __ASM_CSKY_ENTRY_H */