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License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[mirror_ubuntu-bionic-kernel.git] / arch / sparc / mm / viking.S
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b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
88278ca2 2/*
1da177e4
LT		 3 * viking.S: High speed Viking cache/mmu operations
4 *
5 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
6 * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
7 * Copyright (C) 1999 Pavel Semerad (semerad@ss1000.ms.mff.cuni.cz)
8 */
9
1da177e4
LT		 10#include <asm/ptrace.h>
11#include <asm/psr.h>
47003497 12#include <asm/asm-offsets.h>
1da177e4
LT		 13#include <asm/asi.h>
14#include <asm/mxcc.h>
15#include <asm/page.h>
16#include <asm/pgtsrmmu.h>
17#include <asm/viking.h>
1da177e4
LT		 18
19#ifdef CONFIG_SMP
20 .data
21 .align 4
22sun4dsmp_flush_tlb_spin:
23 .word 0
24#endif
25
26 .text
27 .align 4
28
29 .globl viking_flush_cache_all, viking_flush_cache_mm
30 .globl viking_flush_cache_range, viking_flush_cache_page
31 .globl viking_flush_page, viking_mxcc_flush_page
32 .globl viking_flush_page_for_dma, viking_flush_page_to_ram
33 .globl viking_flush_sig_insns
34 .globl viking_flush_tlb_all, viking_flush_tlb_mm
35 .globl viking_flush_tlb_range, viking_flush_tlb_page
36
37viking_flush_page:
38 sethi %hi(PAGE_OFFSET), %g2
39 sub %o0, %g2, %g3
40 srl %g3, 12, %g1 ! ppage >> 12
41
42 clr %o1 ! set counter, 0 - 127
43 sethi %hi(PAGE_OFFSET + PAGE_SIZE - 0x80000000), %o3
44 sethi %hi(0x80000000), %o4
45 sethi %hi(VIKING_PTAG_VALID), %o5
46 sethi %hi(2*PAGE_SIZE), %o0
47 sethi %hi(PAGE_SIZE), %g7
48 clr %o2 ! block counter, 0 - 3
495:
50 sll %o1, 5, %g4
51 or %g4, %o4, %g4 ! 0x80000000 | (set << 5)
52
53 sll %o2, 26, %g5 ! block << 26
546:
55 or %g5, %g4, %g5
56 ldda [%g5] ASI_M_DATAC_TAG, %g2
57 cmp %g3, %g1 ! ptag == ppage?
58 bne 7f
59 inc %o2
60
61 andcc %g2, %o5, %g0 ! ptag VALID?
62 be 7f
63 add %g4, %o3, %g2 ! (PAGE_OFFSET + PAGE_SIZE) | (set << 5)
64 ld [%g2], %g3
65 ld [%g2 + %g7], %g3
66 add %g2, %o0, %g2
67 ld [%g2], %g3
68 ld [%g2 + %g7], %g3
69 add %g2, %o0, %g2
70 ld [%g2], %g3
71 ld [%g2 + %g7], %g3
72 add %g2, %o0, %g2
73 ld [%g2], %g3
74 b 8f
75 ld [%g2 + %g7], %g3
76
777:
78 cmp %o2, 3
79 ble 6b
80 sll %o2, 26, %g5 ! block << 26
81
828: inc %o1
83 cmp %o1, 0x7f
84 ble 5b
85 clr %o2
86
879: retl
88 nop
89
90viking_mxcc_flush_page:
91 sethi %hi(PAGE_OFFSET), %g2
92 sub %o0, %g2, %g3
93 sub %g3, -PAGE_SIZE, %g3 ! ppage + PAGE_SIZE
94 sethi %hi(MXCC_SRCSTREAM), %o3 ! assume %hi(MXCC_SRCSTREAM) == %hi(MXCC_DESTSTREAM)
95 mov 0x10, %g2 ! set cacheable bit
96 or %o3, %lo(MXCC_SRCSTREAM), %o2
97 or %o3, %lo(MXCC_DESSTREAM), %o3
98 sub %g3, MXCC_STREAM_SIZE, %g3
996:
100 stda %g2, [%o2] ASI_M_MXCC
101 stda %g2, [%o3] ASI_M_MXCC
102 andncc %g3, PAGE_MASK, %g0
103 bne 6b
104 sub %g3, MXCC_STREAM_SIZE, %g3
105
1069: retl
107 nop
108
109viking_flush_cache_page:
110viking_flush_cache_range:
111#ifndef CONFIG_SMP
961246b4 112 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 113#endif
114viking_flush_cache_mm:
115#ifndef CONFIG_SMP
116 ld [%o0 + AOFF_mm_context], %g1
117 cmp %g1, -1
118 bne viking_flush_cache_all
119 nop
120 b,a viking_flush_cache_out
121#endif
122viking_flush_cache_all:
123 WINDOW_FLUSH(%g4, %g5)
124viking_flush_cache_out:
125 retl
126 nop
127
128viking_flush_tlb_all:
129 mov 0x400, %g1
130 retl
131 sta %g0, [%g1] ASI_M_FLUSH_PROBE
132
133viking_flush_tlb_mm:
134 mov SRMMU_CTX_REG, %g1
135 ld [%o0 + AOFF_mm_context], %o1
136 lda [%g1] ASI_M_MMUREGS, %g5
137#ifndef CONFIG_SMP
138 cmp %o1, -1
139 be 1f
140#endif
141 mov 0x300, %g2
142 sta %o1, [%g1] ASI_M_MMUREGS
143 sta %g0, [%g2] ASI_M_FLUSH_PROBE
144 retl
145 sta %g5, [%g1] ASI_M_MMUREGS
146#ifndef CONFIG_SMP
1471: retl
148 nop
149#endif
150
151viking_flush_tlb_range:
961246b4 152 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 153 mov SRMMU_CTX_REG, %g1
154 ld [%o0 + AOFF_mm_context], %o3
155 lda [%g1] ASI_M_MMUREGS, %g5
156#ifndef CONFIG_SMP
157 cmp %o3, -1
158 be 2f
159#endif
160 sethi %hi(~((1 << SRMMU_PGDIR_SHIFT) - 1)), %o4
161 sta %o3, [%g1] ASI_M_MMUREGS
162 and %o1, %o4, %o1
163 add %o1, 0x200, %o1
164 sta %g0, [%o1] ASI_M_FLUSH_PROBE
1651: sub %o1, %o4, %o1
166 cmp %o1, %o2
167 blu,a 1b
168 sta %g0, [%o1] ASI_M_FLUSH_PROBE
169 retl
170 sta %g5, [%g1] ASI_M_MMUREGS
171#ifndef CONFIG_SMP
1722: retl
173 nop
174#endif
175
176viking_flush_tlb_page:
961246b4 177 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 178 mov SRMMU_CTX_REG, %g1
179 ld [%o0 + AOFF_mm_context], %o3
180 lda [%g1] ASI_M_MMUREGS, %g5
181#ifndef CONFIG_SMP
182 cmp %o3, -1
183 be 1f
184#endif
185 and %o1, PAGE_MASK, %o1
186 sta %o3, [%g1] ASI_M_MMUREGS
187 sta %g0, [%o1] ASI_M_FLUSH_PROBE
188 retl
189 sta %g5, [%g1] ASI_M_MMUREGS
190#ifndef CONFIG_SMP
1911: retl
192 nop
193#endif
194
195viking_flush_page_to_ram:
196viking_flush_page_for_dma:
197viking_flush_sig_insns:
198 retl
199 nop
200
201#ifdef CONFIG_SMP
202 .globl sun4dsmp_flush_tlb_all, sun4dsmp_flush_tlb_mm
203 .globl sun4dsmp_flush_tlb_range, sun4dsmp_flush_tlb_page
204sun4dsmp_flush_tlb_all:
205 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2061: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
207 tst %g5
208 bne 2f
209 mov 0x400, %g1
210 sta %g0, [%g1] ASI_M_FLUSH_PROBE
211 retl
212 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2132: tst %g5
214 bne,a 2b
215 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
216 b,a 1b
217
218sun4dsmp_flush_tlb_mm:
219 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2201: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
221 tst %g5
222 bne 2f
223 mov SRMMU_CTX_REG, %g1
224 ld [%o0 + AOFF_mm_context], %o1
225 lda [%g1] ASI_M_MMUREGS, %g5
226 mov 0x300, %g2
227 sta %o1, [%g1] ASI_M_MMUREGS
228 sta %g0, [%g2] ASI_M_FLUSH_PROBE
229 sta %g5, [%g1] ASI_M_MMUREGS
230 retl
231 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2322: tst %g5
233 bne,a 2b
234 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
235 b,a 1b
236
237sun4dsmp_flush_tlb_range:
238 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2391: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
240 tst %g5
241 bne 3f
242 mov SRMMU_CTX_REG, %g1
961246b4 243 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 244 ld [%o0 + AOFF_mm_context], %o3
245 lda [%g1] ASI_M_MMUREGS, %g5
246 sethi %hi(~((1 << SRMMU_PGDIR_SHIFT) - 1)), %o4
247 sta %o3, [%g1] ASI_M_MMUREGS
248 and %o1, %o4, %o1
249 add %o1, 0x200, %o1
250 sta %g0, [%o1] ASI_M_FLUSH_PROBE
2512: sub %o1, %o4, %o1
252 cmp %o1, %o2
253 blu,a 2b
254 sta %g0, [%o1] ASI_M_FLUSH_PROBE
255 sta %g5, [%g1] ASI_M_MMUREGS
256 retl
257 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2583: tst %g5
259 bne,a 3b
260 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
261 b,a 1b
262
263sun4dsmp_flush_tlb_page:
264 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2651: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
266 tst %g5
267 bne 2f
268 mov SRMMU_CTX_REG, %g1
961246b4 269 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 270 ld [%o0 + AOFF_mm_context], %o3
271 lda [%g1] ASI_M_MMUREGS, %g5
272 and %o1, PAGE_MASK, %o1
273 sta %o3, [%g1] ASI_M_MMUREGS
274 sta %g0, [%o1] ASI_M_FLUSH_PROBE
275 sta %g5, [%g1] ASI_M_MMUREGS
276 retl
277 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2782: tst %g5
279 bne,a 2b
280 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
281 b,a 1b
282 nop
283#endif
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