1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Cache management functions for Hexagon
4 *
5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
6 */
7
8#include <linux/mm.h>
9#include <asm/cacheflush.h>
10#include <asm/hexagon_vm.h>
11
12#define spanlines(start, end) \
13	(((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)
14
15void flush_dcache_range(unsigned long start, unsigned long end)
16{
17	unsigned long lines = spanlines(start, end-1);
18	unsigned long i, flags;
19
20	start &= ~(LINESIZE - 1);
21
22	local_irq_save(flags);
23
24	for (i = 0; i < lines; i++) {
25		__asm__ __volatile__ (
26		"	dccleaninva(%0);	"
27		:
28		: "r" (start)
29		);
30		start += LINESIZE;
31	}
32	local_irq_restore(flags);
33}
34
35void flush_icache_range(unsigned long start, unsigned long end)
36{
37	unsigned long lines = spanlines(start, end-1);
38	unsigned long i, flags;
39
40	start &= ~(LINESIZE - 1);
41
42	local_irq_save(flags);
43
44	for (i = 0; i < lines; i++) {
45		__asm__ __volatile__ (
46			"	dccleana(%0); "
47			"	icinva(%0);	"
48			:
49			: "r" (start)
50		);
51		start += LINESIZE;
52	}
53	__asm__ __volatile__ (
54		"isync"
55	);
56	local_irq_restore(flags);
57}
58EXPORT_SYMBOL(flush_icache_range);
59
60void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
61{
62	unsigned long lines = spanlines(start, end-1);
63	unsigned long i, flags;
64
65	start &= ~(LINESIZE - 1);
66
67	local_irq_save(flags);
68
69	for (i = 0; i < lines; i++) {
70		__asm__ __volatile__ (
71		"	dccleana(%0);	"
72		:
73		: "r" (start)
74		);
75		start += LINESIZE;
76	}
77	local_irq_restore(flags);
78}
79
80void hexagon_inv_dcache_range(unsigned long start, unsigned long end)
81{
82	unsigned long lines = spanlines(start, end-1);
83	unsigned long i, flags;
84
85	start &= ~(LINESIZE - 1);
86
87	local_irq_save(flags);
88
89	for (i = 0; i < lines; i++) {
90		__asm__ __volatile__ (
91		"	dcinva(%0);	"
92		:
93		: "r" (start)
94		);
95		start += LINESIZE;
96	}
97	local_irq_restore(flags);
98}
99
100
101
102
103/*
104 * This is just really brutal and shouldn't be used anyways,
105 * especially on V2.  Left here just in case.
106 */
107void flush_cache_all_hexagon(void)
108{
109	unsigned long flags;
110	local_irq_save(flags);
111	__vmcache_ickill();
112	__vmcache_dckill();
113	__vmcache_l2kill();
114	local_irq_restore(flags);
115	mb();
116}
117
118void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
119		       unsigned long vaddr, void *dst, void *src, int len)
120{
121	memcpy(dst, src, len);
122	if (vma->vm_flags & VM_EXEC) {
123		flush_icache_range((unsigned long) dst,
124		(unsigned long) dst + len);
125	}
126}
127