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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[linux.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 ([email protected])
6 * Copyright (C) 1997,1998,1999 Jakub Jelinek ([email protected])
7 * Copyright (C) 1999 Pavel Semerad ([email protected])
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>
8e958839 16#include <asm/pgtable.h>
1da177e4
LT		 17#include <asm/pgtsrmmu.h>
18#include <asm/viking.h>
1da177e4
LT		 19
20#ifdef CONFIG_SMP
21 .data
22 .align 4
23sun4dsmp_flush_tlb_spin:
24 .word 0
25#endif
26
27 .text
28 .align 4
29
30 .globl viking_flush_cache_all, viking_flush_cache_mm
31 .globl viking_flush_cache_range, viking_flush_cache_page
32 .globl viking_flush_page, viking_mxcc_flush_page
33 .globl viking_flush_page_for_dma, viking_flush_page_to_ram
34 .globl viking_flush_sig_insns
35 .globl viking_flush_tlb_all, viking_flush_tlb_mm
36 .globl viking_flush_tlb_range, viking_flush_tlb_page
37
38viking_flush_page:
39 sethi %hi(PAGE_OFFSET), %g2
40 sub %o0, %g2, %g3
41 srl %g3, 12, %g1 ! ppage >> 12
42
43 clr %o1 ! set counter, 0 - 127
44 sethi %hi(PAGE_OFFSET + PAGE_SIZE - 0x80000000), %o3
45 sethi %hi(0x80000000), %o4
46 sethi %hi(VIKING_PTAG_VALID), %o5
47 sethi %hi(2*PAGE_SIZE), %o0
48 sethi %hi(PAGE_SIZE), %g7
49 clr %o2 ! block counter, 0 - 3
505:
51 sll %o1, 5, %g4
52 or %g4, %o4, %g4 ! 0x80000000 | (set << 5)
53
54 sll %o2, 26, %g5 ! block << 26
556:
56 or %g5, %g4, %g5
57 ldda [%g5] ASI_M_DATAC_TAG, %g2
58 cmp %g3, %g1 ! ptag == ppage?
59 bne 7f
60 inc %o2
61
62 andcc %g2, %o5, %g0 ! ptag VALID?
63 be 7f
64 add %g4, %o3, %g2 ! (PAGE_OFFSET + PAGE_SIZE) | (set << 5)
65 ld [%g2], %g3
66 ld [%g2 + %g7], %g3
67 add %g2, %o0, %g2
68 ld [%g2], %g3
69 ld [%g2 + %g7], %g3
70 add %g2, %o0, %g2
71 ld [%g2], %g3
72 ld [%g2 + %g7], %g3
73 add %g2, %o0, %g2
74 ld [%g2], %g3
75 b 8f
76 ld [%g2 + %g7], %g3
77
787:
79 cmp %o2, 3
80 ble 6b
81 sll %o2, 26, %g5 ! block << 26
82
838: inc %o1
84 cmp %o1, 0x7f
85 ble 5b
86 clr %o2
87
889: retl
89 nop
90
91viking_mxcc_flush_page:
92 sethi %hi(PAGE_OFFSET), %g2
93 sub %o0, %g2, %g3
94 sub %g3, -PAGE_SIZE, %g3 ! ppage + PAGE_SIZE
95 sethi %hi(MXCC_SRCSTREAM), %o3 ! assume %hi(MXCC_SRCSTREAM) == %hi(MXCC_DESTSTREAM)
96 mov 0x10, %g2 ! set cacheable bit
97 or %o3, %lo(MXCC_SRCSTREAM), %o2
98 or %o3, %lo(MXCC_DESSTREAM), %o3
99 sub %g3, MXCC_STREAM_SIZE, %g3
1006:
101 stda %g2, [%o2] ASI_M_MXCC
102 stda %g2, [%o3] ASI_M_MXCC
103 andncc %g3, PAGE_MASK, %g0
104 bne 6b
105 sub %g3, MXCC_STREAM_SIZE, %g3
106
1079: retl
108 nop
109
110viking_flush_cache_page:
111viking_flush_cache_range:
112#ifndef CONFIG_SMP
961246b4 113 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 114#endif
115viking_flush_cache_mm:
116#ifndef CONFIG_SMP
117 ld [%o0 + AOFF_mm_context], %g1
118 cmp %g1, -1
119 bne viking_flush_cache_all
120 nop
121 b,a viking_flush_cache_out
122#endif
123viking_flush_cache_all:
124 WINDOW_FLUSH(%g4, %g5)
125viking_flush_cache_out:
126 retl
127 nop
128
129viking_flush_tlb_all:
130 mov 0x400, %g1
131 retl
132 sta %g0, [%g1] ASI_M_FLUSH_PROBE
133
134viking_flush_tlb_mm:
135 mov SRMMU_CTX_REG, %g1
136 ld [%o0 + AOFF_mm_context], %o1
137 lda [%g1] ASI_M_MMUREGS, %g5
138#ifndef CONFIG_SMP
139 cmp %o1, -1
140 be 1f
141#endif
142 mov 0x300, %g2
143 sta %o1, [%g1] ASI_M_MMUREGS
144 sta %g0, [%g2] ASI_M_FLUSH_PROBE
145 retl
146 sta %g5, [%g1] ASI_M_MMUREGS
147#ifndef CONFIG_SMP
1481: retl
149 nop
150#endif
151
152viking_flush_tlb_range:
961246b4 153 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 154 mov SRMMU_CTX_REG, %g1
155 ld [%o0 + AOFF_mm_context], %o3
156 lda [%g1] ASI_M_MMUREGS, %g5
157#ifndef CONFIG_SMP
158 cmp %o3, -1
159 be 2f
160#endif
8e958839 161 sethi %hi(~((1 << PGDIR_SHIFT) - 1)), %o4
1da177e4
LT		 162 sta %o3, [%g1] ASI_M_MMUREGS
163 and %o1, %o4, %o1
164 add %o1, 0x200, %o1
165 sta %g0, [%o1] ASI_M_FLUSH_PROBE
1661: sub %o1, %o4, %o1
167 cmp %o1, %o2
168 blu,a 1b
169 sta %g0, [%o1] ASI_M_FLUSH_PROBE
170 retl
171 sta %g5, [%g1] ASI_M_MMUREGS
172#ifndef CONFIG_SMP
1732: retl
174 nop
175#endif
176
177viking_flush_tlb_page:
961246b4 178 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 179 mov SRMMU_CTX_REG, %g1
180 ld [%o0 + AOFF_mm_context], %o3
181 lda [%g1] ASI_M_MMUREGS, %g5
182#ifndef CONFIG_SMP
183 cmp %o3, -1
184 be 1f
185#endif
186 and %o1, PAGE_MASK, %o1
187 sta %o3, [%g1] ASI_M_MMUREGS
188 sta %g0, [%o1] ASI_M_FLUSH_PROBE
189 retl
190 sta %g5, [%g1] ASI_M_MMUREGS
191#ifndef CONFIG_SMP
1921: retl
193 nop
194#endif
195
196viking_flush_page_to_ram:
197viking_flush_page_for_dma:
198viking_flush_sig_insns:
199 retl
200 nop
201
202#ifdef CONFIG_SMP
203 .globl sun4dsmp_flush_tlb_all, sun4dsmp_flush_tlb_mm
204 .globl sun4dsmp_flush_tlb_range, sun4dsmp_flush_tlb_page
205sun4dsmp_flush_tlb_all:
206 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2071: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
208 tst %g5
209 bne 2f
210 mov 0x400, %g1
211 sta %g0, [%g1] ASI_M_FLUSH_PROBE
212 retl
213 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2142: tst %g5
215 bne,a 2b
216 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
217 b,a 1b
218
219sun4dsmp_flush_tlb_mm:
220 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2211: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
222 tst %g5
223 bne 2f
224 mov SRMMU_CTX_REG, %g1
225 ld [%o0 + AOFF_mm_context], %o1
226 lda [%g1] ASI_M_MMUREGS, %g5
227 mov 0x300, %g2
228 sta %o1, [%g1] ASI_M_MMUREGS
229 sta %g0, [%g2] ASI_M_FLUSH_PROBE
230 sta %g5, [%g1] ASI_M_MMUREGS
231 retl
232 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2332: tst %g5
234 bne,a 2b
235 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
236 b,a 1b
237
238sun4dsmp_flush_tlb_range:
239 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2401: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
241 tst %g5
242 bne 3f
243 mov SRMMU_CTX_REG, %g1
961246b4 244 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 245 ld [%o0 + AOFF_mm_context], %o3
246 lda [%g1] ASI_M_MMUREGS, %g5
8e958839 247 sethi %hi(~((1 << PGDIR_SHIFT) - 1)), %o4
1da177e4
LT		 248 sta %o3, [%g1] ASI_M_MMUREGS
249 and %o1, %o4, %o1
250 add %o1, 0x200, %o1
251 sta %g0, [%o1] ASI_M_FLUSH_PROBE
2522: sub %o1, %o4, %o1
253 cmp %o1, %o2
254 blu,a 2b
255 sta %g0, [%o1] ASI_M_FLUSH_PROBE
256 sta %g5, [%g1] ASI_M_MMUREGS
257 retl
258 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2593: tst %g5
260 bne,a 3b
261 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
262 b,a 1b
263
264sun4dsmp_flush_tlb_page:
265 sethi %hi(sun4dsmp_flush_tlb_spin), %g3
2661: ldstub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
267 tst %g5
268 bne 2f
269 mov SRMMU_CTX_REG, %g1
961246b4 270 ld [%o0 + VMA_VM_MM], %o0
1da177e4
LT		 271 ld [%o0 + AOFF_mm_context], %o3
272 lda [%g1] ASI_M_MMUREGS, %g5
273 and %o1, PAGE_MASK, %o1
274 sta %o3, [%g1] ASI_M_MMUREGS
275 sta %g0, [%o1] ASI_M_FLUSH_PROBE
276 sta %g5, [%g1] ASI_M_MMUREGS
277 retl
278 stb %g0, [%g3 + %lo(sun4dsmp_flush_tlb_spin)]
2792: tst %g5
280 bne,a 2b
281 ldub [%g3 + %lo(sun4dsmp_flush_tlb_spin)], %g5
282 b,a 1b
283 nop
284#endif
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