xref: /openbmc/linux/arch/sparc/mm/viking.S (revision f20c7d91) 
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
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
10#include <asm/ptrace.h>
11#include <asm/psr.h>
12#include <asm/asm-offsets.h>
13#include <asm/asi.h>
14#include <asm/mxcc.h>
15#include <asm/page.h>
16#include <asm/pgtable.h>
17#include <asm/pgtsrmmu.h>
18#include <asm/viking.h>
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
113	ld	[%o0 + VMA_VM_MM], %o0
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:
153	ld	[%o0 + VMA_VM_MM], %o0
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
161	sethi	%hi(~((1 << PGDIR_SHIFT) - 1)), %o4
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:
178	ld	[%o0 + VMA_VM_MM], %o0
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
244	ld	[%o0 + VMA_VM_MM], %o0
245	ld	[%o0 + AOFF_mm_context], %o3
246	lda	[%g1] ASI_M_MMUREGS, %g5
247	sethi	%hi(~((1 << PGDIR_SHIFT) - 1)), %o4
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
270	ld	[%o0 + VMA_VM_MM], %o0
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
285