1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
 4 */
 5
 6#ifndef _ASM_HIGHMEM_H
 7#define _ASM_HIGHMEM_H
 8
 9#ifdef CONFIG_HIGHMEM
10
11#include <uapi/asm/page.h>
12#include <asm/kmap_size.h>
13
14#define FIXMAP_SIZE		PGDIR_SIZE
15#define PKMAP_SIZE		PGDIR_SIZE
16
17/* start after vmalloc area */
18#define FIXMAP_BASE		(PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
19
20#define FIX_KMAP_SLOTS		(KM_MAX_IDX * NR_CPUS)
21#define FIX_KMAP_BEGIN		(0UL)
22#define FIX_KMAP_END		((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1)
23
24#define FIXADDR_TOP		(FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT))
25
26/*
27 * This should be converted to the asm-generic version, but of course this
28 * is needlessly different from all other architectures. Sigh - tglx
29 */
30#define __fix_to_virt(x)	(FIXADDR_TOP - ((x) << PAGE_SHIFT))
31#define __virt_to_fix(x)	(((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT)
32
33/* start after fixmap area */
34#define PKMAP_BASE		(FIXMAP_BASE + FIXMAP_SIZE)
 
35#define LAST_PKMAP		(PKMAP_SIZE >> PAGE_SHIFT)
36#define LAST_PKMAP_MASK		(LAST_PKMAP - 1)
37#define PKMAP_ADDR(nr)		(PKMAP_BASE + ((nr) << PAGE_SHIFT))
38#define PKMAP_NR(virt)		(((virt) - PKMAP_BASE) >> PAGE_SHIFT)
39
40#include <asm/cacheflush.h>
41
42extern void kmap_init(void);
43
44#define arch_kmap_local_post_unmap(vaddr)			\
45	local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE)
46
47static inline void flush_cache_kmaps(void)
48{
49	flush_cache_all();
50}
 
51#endif
52
53#endif

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
 4 */
 5
 6#ifndef _ASM_HIGHMEM_H
 7#define _ASM_HIGHMEM_H
 8
 9#ifdef CONFIG_HIGHMEM
10
11#include <uapi/asm/page.h>
12#include <asm/kmap_types.h>
 
 
 
13
14/* start after vmalloc area */
15#define FIXMAP_BASE		(PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
16#define FIXMAP_SIZE		PGDIR_SIZE	/* only 1 PGD worth */
17#define KM_TYPE_NR		((FIXMAP_SIZE >> PAGE_SHIFT)/NR_CPUS)
18#define FIXMAP_ADDR(nr)		(FIXMAP_BASE + ((nr) << PAGE_SHIFT))
 
 
 
 
 
 
 
 
 
 
19
20/* start after fixmap area */
21#define PKMAP_BASE		(FIXMAP_BASE + FIXMAP_SIZE)
22#define PKMAP_SIZE		PGDIR_SIZE
23#define LAST_PKMAP		(PKMAP_SIZE >> PAGE_SHIFT)
24#define LAST_PKMAP_MASK		(LAST_PKMAP - 1)
25#define PKMAP_ADDR(nr)		(PKMAP_BASE + ((nr) << PAGE_SHIFT))
26#define PKMAP_NR(virt)		(((virt) - PKMAP_BASE) >> PAGE_SHIFT)
27
28#include <asm/cacheflush.h>
29
30extern void kmap_init(void);
31
 
 
 
32static inline void flush_cache_kmaps(void)
33{
34	flush_cache_all();
35}
36
37#endif
38
39#endif