arch/kmap: clean-up after b365c5d17d7e

/* SPDX-License-Identifier: GPL-2.0 */

// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.

#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_types.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))

extern void kunmap_high(struct page *page);

#define ARCH_HAS_KMAP_FLUSH_TLB

extern void kmap_flush_tlb(unsigned long addr);

extern void kunmap(struct page *page);

extern void *kmap_atomic(struct page *page);

extern void __kunmap_atomic(void *kvaddr);

extern void *kmap_atomic_pfn(unsigned long pfn);

extern struct page *kmap_atomic_to_page(void *ptr);

#define flush_cache_kmaps() do {} while (0)

extern void kmap_init(void);

#define kmap_prot PAGE_KERNEL

#endif /* __KERNEL__ */

#endif /* __ASM_CSKY_HIGHMEM_H */

/* SPDX-License-Identifier: GPL-2.0 */

// Copyright (C) 2005-2017 Andes Technology Corporation

#ifndef _ASM_HIGHMEM_H

#define _ASM_HIGHMEM_H

#include <asm/proc-fns.h>

#include <asm/kmap_types.h>

#include <asm/fixmap.h>

#include <asm/pgtable.h>

/*

 * 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.

 */

/*

 * Ordering is (from lower to higher memory addresses):

 *

 * high_memory

 *			Persistent kmap area

 * PKMAP_BASE

 *			fixed_addresses

 * FIXADDR_START

 * FIXADDR_TOP

 *			Vmalloc area

 * VMALLOC_START

 * VMALLOC_END

 */

#define PKMAP_BASE		((FIXADDR_START - PGDIR_SIZE) & (PGDIR_MASK))

#define LAST_PKMAP		PTRS_PER_PTE

#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 kmap_prot		PAGE_KERNEL

static inline void flush_cache_kmaps(void)

{

	cpu_dcache_wbinval_all();

}

/* declarations for highmem.c */

extern unsigned long highstart_pfn, highend_pfn;

extern pte_t *pkmap_page_table;

extern void kunmap_high(struct page *page);

extern void kmap_init(void);

/*

 * The following functions are already defined by <linux/highmem.h>

 * when CONFIG_HIGHMEM is not set.

 */

#ifdef CONFIG_HIGHMEM

extern void kunmap(struct page *page);

extern void *kmap_atomic(struct page *page);

extern void __kunmap_atomic(void *kvaddr);

extern void *kmap_atomic_pfn(unsigned long pfn);

extern struct page *kmap_atomic_to_page(void *ptr);

#endif

#endif