1 /* SPDX-License-Identifier: GPL-2.0-only */ 1
2 /*
3 * Cache flush operations for the Hexagon arch
4 *
5 * Copyright (c) 2010-2011, The Linux Foundati
6 */
7
8 #ifndef _ASM_CACHEFLUSH_H
9 #define _ASM_CACHEFLUSH_H
10
11 #include <linux/mm_types.h>
12
13 /* Cache flushing:
14 *
15 * - flush_cache_all() flushes entire cache
16 * - flush_cache_mm(mm) flushes the specified
17 * - flush_cache_page(mm, vmaddr, pfn) flushe
18 * - flush_cache_range(vma, start, end) flush
19 * - flush_icache_range(start, end) flush a r
20 * - flush_dcache_page(pg) flushes(wback&inva
21 * - flush_icache_pages(vma, pg, nr) flushes(
22 *
23 * Need to doublecheck which one is really ne
24 */
25 #define LINESIZE 32
26 #define LINEBITS 5
27
28 /*
29 * Flush Dcache range through current map.
30 */
31 extern void flush_dcache_range(unsigned long s
32 #define flush_dcache_range flush_dcache_range
33
34 /*
35 * Flush Icache range through current map.
36 */
37 extern void flush_icache_range(unsigned long s
38 #define flush_icache_range flush_icache_range
39
40 /*
41 * Memory-management related flushes are there
42 * indexed cache schemes that stale lines belo
43 * in the cache to confuse things. The protot
44 * only uses a single ASID for all user-mode m
45 * mean that they aren't necessary. A brute-f
46 * implementation, with the name xxxxx_hexagon
47 * arch/hexagon/mm/cache.c, but let's not wire
48 * it is needed.
49 */
50 extern void flush_cache_all_hexagon(void);
51
52 /*
53 * This may or may not ever have to be non-nul
54 * virtual machine MMU. For a native kernel,
55 *
56 * This is also the place where deferred cache
57 * to happen, classically... but instead we d
58 * clean the cache when the PTE is set.
59 *
60 */
61 static inline void update_mmu_cache_range(stru
62 struct vm_area_struct *vma, un
63 pte_t *ptep, unsigned int nr)
64 {
65 /* generic_ptrace_pokedata doesn't wi
66 }
67
68 #define update_mmu_cache(vma, addr, ptep) \
69 update_mmu_cache_range(NULL, vma, addr
70
71 void copy_to_user_page(struct vm_area_struct *
72 unsigned long vaddr, vo
73 #define copy_to_user_page copy_to_user_page
74
75 #define copy_from_user_page(vma, page, vaddr,
76 memcpy(dst, src, len)
77
78 extern void hexagon_inv_dcache_range(unsigned
79 extern void hexagon_clean_dcache_range(unsigne
80
81 #include <asm-generic/cacheflush.h>
82
83 #endif
84
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