162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#ifndef __ASM_CSKY_HIGHMEM_H 462306a36Sopenharmony_ci#define __ASM_CSKY_HIGHMEM_H 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci#ifdef __KERNEL__ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <linux/init.h> 962306a36Sopenharmony_ci#include <linux/interrupt.h> 1062306a36Sopenharmony_ci#include <linux/uaccess.h> 1162306a36Sopenharmony_ci#include <asm/kmap_size.h> 1262306a36Sopenharmony_ci#include <asm/cache.h> 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci/* undef for production */ 1562306a36Sopenharmony_ci#define HIGHMEM_DEBUG 1 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci/* declarations for highmem.c */ 1862306a36Sopenharmony_ciextern unsigned long highstart_pfn, highend_pfn; 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ciextern pte_t *pkmap_page_table; 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci/* 2362306a36Sopenharmony_ci * Right now we initialize only a single pte table. It can be extended 2462306a36Sopenharmony_ci * easily, subsequent pte tables have to be allocated in one physical 2562306a36Sopenharmony_ci * chunk of RAM. 2662306a36Sopenharmony_ci */ 2762306a36Sopenharmony_ci#define LAST_PKMAP 1024 2862306a36Sopenharmony_ci#define LAST_PKMAP_MASK (LAST_PKMAP-1) 2962306a36Sopenharmony_ci#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT) 3062306a36Sopenharmony_ci#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci#define ARCH_HAS_KMAP_FLUSH_TLB 3362306a36Sopenharmony_ciextern void kmap_flush_tlb(unsigned long addr); 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci#define flush_cache_kmaps() do {} while (0) 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci#define arch_kmap_local_post_map(vaddr, pteval) kmap_flush_tlb(vaddr) 3862306a36Sopenharmony_ci#define arch_kmap_local_post_unmap(vaddr) kmap_flush_tlb(vaddr) 3962306a36Sopenharmony_ci 4062306a36Sopenharmony_ciextern void kmap_init(void); 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ci#endif /* __KERNEL__ */ 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ci#endif /* __ASM_CSKY_HIGHMEM_H */ 45