1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_CSKY_HIGHMEM_H
4#define __ASM_CSKY_HIGHMEM_H
5
6#ifdef __KERNEL__
7
8#include <linux/init.h>
9#include <linux/interrupt.h>
10#include <linux/uaccess.h>
11#include <asm/kmap_size.h>
12#include <asm/cache.h>
13
14/* undef for production */
15#define HIGHMEM_DEBUG 1
16
17/* declarations for highmem.c */
18extern unsigned long highstart_pfn, highend_pfn;
19
20extern pte_t *pkmap_page_table;
21
22/*
23 * Right now we initialize only a single pte table. It can be extended
24 * easily, subsequent pte tables have to be allocated in one physical
25 * chunk of RAM.
26 */
27#define LAST_PKMAP 1024
28#define LAST_PKMAP_MASK (LAST_PKMAP-1)
29#define PKMAP_NR(virt)  ((virt-PKMAP_BASE) >> PAGE_SHIFT)
30#define PKMAP_ADDR(nr)  (PKMAP_BASE + ((nr) << PAGE_SHIFT))
31
32#define ARCH_HAS_KMAP_FLUSH_TLB
33extern void kmap_flush_tlb(unsigned long addr);
34
35#define flush_cache_kmaps() do {} while (0)
36
37#define arch_kmap_local_post_map(vaddr, pteval)	kmap_flush_tlb(vaddr)
38#define arch_kmap_local_post_unmap(vaddr)	kmap_flush_tlb(vaddr)
39
40extern void kmap_init(void);
41
42#endif /* __KERNEL__ */
43
44#endif /* __ASM_CSKY_HIGHMEM_H */
45