arch/arc/include/asm/highmem.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
   4  */
   5
   6 #ifndef _ASM_HIGHMEM_H
   7 #define _ASM_HIGHMEM_H
   8
   9 #ifdef CONFIG_HIGHMEM
  10
  11 #include <uapi/asm/page.h>
  12 #include <asm/kmap_size.h>
  13
  14 #define FIXMAP_SIZE             PGDIR_SIZE
  15 #define PKMAP_SIZE              PGDIR_SIZE
  16
  17 /* start after vmalloc area */
  18 #define FIXMAP_BASE             (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
  19
  20 #define FIX_KMAP_SLOTS          (KM_MAX_IDX * NR_CPUS)
  21 #define FIX_KMAP_BEGIN          (0UL)
  22 #define FIX_KMAP_END            ((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1)
  23
  24 #define FIXADDR_TOP             (FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT))
  25
  26 /*
  27  * This should be converted to the asm-generic version, but of course this
  28  * is needlessly different from all other architectures. Sigh - tglx
  29  */
  30 #define __fix_to_virt(x)        (FIXADDR_TOP - ((x) << PAGE_SHIFT))
  31 #define __virt_to_fix(x)        (((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT)
  32
  33 /* start after fixmap area */
  34 #define PKMAP_BASE              (FIXMAP_BASE + FIXMAP_SIZE)
  35 #define LAST_PKMAP              (PKMAP_SIZE >> PAGE_SHIFT)
  36 #define LAST_PKMAP_MASK         (LAST_PKMAP - 1)
  37 #define PKMAP_ADDR(nr)          (PKMAP_BASE + ((nr) << PAGE_SHIFT))
  38 #define PKMAP_NR(virt)          (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
  39
  40 #include <asm/cacheflush.h>
  41
  42 extern void kmap_init(void);
  43
  44 #define arch_kmap_local_post_unmap(vaddr)                       \
  45         local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE)
  46
  47 static inline void flush_cache_kmaps(void)
  48 {
  49         flush_cache_all();
  50 }
  51 #endif
  52
  53 #endif