/* 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_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 */