xref: /openbmc/linux/arch/sparc/mm/tsunami.S (revision b2441318)
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * tsunami.S: High speed MicroSparc-I mmu/cache operations.
4 *
5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
6 */
7
8#include <asm/ptrace.h>
9#include <asm/asm-offsets.h>
10#include <asm/psr.h>
11#include <asm/asi.h>
12#include <asm/page.h>
13#include <asm/pgtsrmmu.h>
14
15	.text
16	.align	4
17
18	.globl	tsunami_flush_cache_all, tsunami_flush_cache_mm
19	.globl	tsunami_flush_cache_range, tsunami_flush_cache_page
20	.globl	tsunami_flush_page_to_ram, tsunami_flush_page_for_dma
21	.globl	tsunami_flush_sig_insns
22	.globl	tsunami_flush_tlb_all, tsunami_flush_tlb_mm
23	.globl	tsunami_flush_tlb_range, tsunami_flush_tlb_page
24
25	/* Sliiick... */
26tsunami_flush_cache_page:
27tsunami_flush_cache_range:
28	ld	[%o0 + VMA_VM_MM], %o0
29tsunami_flush_cache_mm:
30	ld	[%o0 + AOFF_mm_context], %g2
31	cmp	%g2, -1
32	be	tsunami_flush_cache_out
33tsunami_flush_cache_all:
34	WINDOW_FLUSH(%g4, %g5)
35tsunami_flush_page_for_dma:
36	sta	%g0, [%g0] ASI_M_IC_FLCLEAR
37	sta	%g0, [%g0] ASI_M_DC_FLCLEAR
38tsunami_flush_cache_out:
39tsunami_flush_page_to_ram:
40	retl
41	 nop
42
43tsunami_flush_sig_insns:
44	flush	%o1
45	retl
46	 flush	%o1 + 4
47
48	/* More slick stuff... */
49tsunami_flush_tlb_range:
50	ld	[%o0 + VMA_VM_MM], %o0
51tsunami_flush_tlb_mm:
52	ld	[%o0 + AOFF_mm_context], %g2
53	cmp	%g2, -1
54	be	tsunami_flush_tlb_out
55tsunami_flush_tlb_all:
56	 mov	0x400, %o1
57	sta	%g0, [%o1] ASI_M_FLUSH_PROBE
58	nop
59	nop
60	nop
61	nop
62	nop
63tsunami_flush_tlb_out:
64	retl
65	 nop
66
67	/* This one can be done in a fine grained manner... */
68tsunami_flush_tlb_page:
69	ld	[%o0 + VMA_VM_MM], %o0
70	mov	SRMMU_CTX_REG, %g1
71	ld	[%o0 + AOFF_mm_context], %o3
72	andn	%o1, (PAGE_SIZE - 1), %o1
73	cmp	%o3, -1
74	be	tsunami_flush_tlb_page_out
75	 lda	[%g1] ASI_M_MMUREGS, %g5
76	sta	%o3, [%g1] ASI_M_MMUREGS
77	sta	%g0, [%o1] ASI_M_FLUSH_PROBE
78	nop
79	nop
80	nop
81	nop
82	nop
83tsunami_flush_tlb_page_out:
84	retl
85	 sta	%g5, [%g1] ASI_M_MMUREGS
86
87#define MIRROR_BLOCK(dst, src, offset, t0, t1, t2, t3) \
88	ldd	[src + offset + 0x18], t0; \
89	std	t0, [dst + offset + 0x18]; \
90	ldd	[src + offset + 0x10], t2; \
91	std	t2, [dst + offset + 0x10]; \
92	ldd	[src + offset + 0x08], t0; \
93	std	t0, [dst + offset + 0x08]; \
94	ldd	[src + offset + 0x00], t2; \
95	std	t2, [dst + offset + 0x00];
96
97tsunami_copy_1page:
98/* NOTE: This routine has to be shorter than 70insns --jj */
99	or	%g0, (PAGE_SIZE >> 8), %g1
1001:
101	MIRROR_BLOCK(%o0, %o1, 0x00, %o2, %o3, %o4, %o5)
102	MIRROR_BLOCK(%o0, %o1, 0x20, %o2, %o3, %o4, %o5)
103	MIRROR_BLOCK(%o0, %o1, 0x40, %o2, %o3, %o4, %o5)
104	MIRROR_BLOCK(%o0, %o1, 0x60, %o2, %o3, %o4, %o5)
105	MIRROR_BLOCK(%o0, %o1, 0x80, %o2, %o3, %o4, %o5)
106	MIRROR_BLOCK(%o0, %o1, 0xa0, %o2, %o3, %o4, %o5)
107	MIRROR_BLOCK(%o0, %o1, 0xc0, %o2, %o3, %o4, %o5)
108	MIRROR_BLOCK(%o0, %o1, 0xe0, %o2, %o3, %o4, %o5)
109	subcc	%g1, 1, %g1
110	add	%o0, 0x100, %o0
111	bne	1b
112	 add	%o1, 0x100, %o1
113
114	.globl	tsunami_setup_blockops
115tsunami_setup_blockops:
116	sethi	%hi(__copy_1page), %o0
117	or	%o0, %lo(__copy_1page), %o0
118	sethi	%hi(tsunami_copy_1page), %o1
119	or	%o1, %lo(tsunami_copy_1page), %o1
120	sethi	%hi(tsunami_setup_blockops), %o2
121	or	%o2, %lo(tsunami_setup_blockops), %o2
122	ld	[%o1], %o4
1231:	add	%o1, 4, %o1
124	st	%o4, [%o0]
125	add	%o0, 4, %o0
126	cmp	%o1, %o2
127	bne	1b
128	ld	[%o1], %o4
129	sta	%g0, [%g0] ASI_M_IC_FLCLEAR
130	sta	%g0, [%g0] ASI_M_DC_FLCLEAR
131	retl
132	 nop
133