blob: 1ed810effb3d1ee90d73d50e299fa157ab9c86f1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_CSKY_HIGHMEM_H
#define __ASM_CSKY_HIGHMEM_H
#ifdef __KERNEL__
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
#include <asm/kmap_size.h>
#include <asm/cache.h>
/* undef for production */
#define HIGHMEM_DEBUG 1
/* declarations for highmem.c */
extern unsigned long highstart_pfn, highend_pfn;
extern pte_t *pkmap_page_table;
/*
* Right now we initialize only a single pte table. It can be extended
* easily, subsequent pte tables have to be allocated in one physical
* chunk of RAM.
*/
#define LAST_PKMAP 1024
#define LAST_PKMAP_MASK (LAST_PKMAP-1)
#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
#define ARCH_HAS_KMAP_FLUSH_TLB
extern void kmap_flush_tlb(unsigned long addr);
#define flush_cache_kmaps() do {} while (0)
#define arch_kmap_local_post_map(vaddr, pteval) kmap_flush_tlb(vaddr)
#define arch_kmap_local_post_unmap(vaddr) kmap_flush_tlb(vaddr)
extern void kmap_init(void);
#endif /* __KERNEL__ */
#endif /* __ASM_CSKY_HIGHMEM_H */
|
