1 // SPDX-License-Identifier: GPL-2.0-or-later 1
2 /*
3 * OpenRISC cache.c
4 *
5 * Linux architectural port borrowing liberall
6 * others. All original copyrights apply as p
7 * declaration.
8 *
9 * Modifications for the OpenRISC architecture
10 * Copyright (C) 2015 Jan Henrik Weinstock <ja
11 */
12
13 #include <asm/spr.h>
14 #include <asm/spr_defs.h>
15 #include <asm/cache.h>
16 #include <asm/cacheflush.h>
17 #include <asm/tlbflush.h>
18
19 static __always_inline void cache_loop(struct
20 {
21 unsigned long paddr = page_to_pfn(page
22 unsigned long line = paddr & ~(L1_CACH
23
24 while (line < paddr + PAGE_SIZE) {
25 mtspr(reg, line);
26 line += L1_CACHE_BYTES;
27 }
28 }
29
30 void local_dcache_page_flush(struct page *page
31 {
32 cache_loop(page, SPR_DCBFR);
33 }
34 EXPORT_SYMBOL(local_dcache_page_flush);
35
36 void local_icache_page_inv(struct page *page)
37 {
38 cache_loop(page, SPR_ICBIR);
39 }
40 EXPORT_SYMBOL(local_icache_page_inv);
41
42 void update_cache(struct vm_area_struct *vma,
43 pte_t *pte)
44 {
45 unsigned long pfn = pte_val(*pte) >> P
46 struct folio *folio = page_folio(pfn_t
47 int dirty = !test_and_set_bit(PG_dc_cl
48
49 /*
50 * Since icaches do not snoop for upda
51 * must write back and invalidate any
52 * can skip data pages, since they wil
53 */
54 if ((vma->vm_flags & VM_EXEC) && dirty
55 unsigned int nr = folio_nr_pag
56
57 while (nr--)
58 sync_icache_dcache(fol
59 }
60 }
61
62
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