1 /* !! 1 // SPDX-License-Identifier: GPL-2.0
2 * High memory support for Xtensa architecture !! 2 #include <linux/compiler.h>
3 * !! 3 #include <linux/init.h>
4 * This file is subject to the terms and condi <<
5 * Public License. See the file "COPYING" in <<
6 * this archive for more details. <<
7 * <<
8 * Copyright (C) 2014 Cadence Design Systems I <<
9 */ <<
10 <<
11 #include <linux/export.h> 4 #include <linux/export.h>
12 #include <linux/highmem.h> 5 #include <linux/highmem.h>
>> 6 #include <linux/sched.h>
>> 7 #include <linux/smp.h>
>> 8 #include <asm/fixmap.h>
13 #include <asm/tlbflush.h> 9 #include <asm/tlbflush.h>
14 10
15 #if DCACHE_WAY_SIZE > PAGE_SIZE !! 11 unsigned long highstart_pfn, highend_pfn;
16 unsigned int last_pkmap_nr_arr[DCACHE_N_COLORS <<
17 wait_queue_head_t pkmap_map_wait_arr[DCACHE_N_ <<
18 <<
19 static void __init kmap_waitqueues_init(void) <<
20 { <<
21 unsigned int i; <<
22 <<
23 for (i = 0; i < ARRAY_SIZE(pkmap_map_w <<
24 init_waitqueue_head(pkmap_map_ <<
25 } <<
26 <<
27 static inline enum fixed_addresses kmap_idx(in <<
28 { <<
29 int idx = (type + KM_MAX_IDX * smp_pro <<
30 <<
31 /* <<
32 * The fixmap operates top down, so th <<
33 * reverse as well. <<
34 */ <<
35 return idx + DCACHE_N_COLORS - 1 - col <<
36 } <<
37 <<
38 enum fixed_addresses kmap_local_map_idx(int ty <<
39 { <<
40 return kmap_idx(type, DCACHE_ALIAS(pfn <<
41 } <<
42 <<
43 enum fixed_addresses kmap_local_unmap_idx(int <<
44 { <<
45 return kmap_idx(type, DCACHE_ALIAS(add <<
46 } <<
47 <<
48 #else <<
49 static inline void kmap_waitqueues_init(void) <<
50 #endif <<
51 12
52 void __init kmap_init(void) !! 13 void kmap_flush_tlb(unsigned long addr)
53 { 14 {
54 /* Check if this memory layout is brok !! 15 flush_tlb_one(addr);
55 * page table. <<
56 */ <<
57 BUILD_BUG_ON(PKMAP_BASE < TLBTEMP_BASE <<
58 kmap_waitqueues_init(); <<
59 } 16 }
>> 17 EXPORT_SYMBOL(kmap_flush_tlb);
60 18
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