LXR linux/arch/arm64/include/asm/trans

   1/* SPDX-License-Identifier: GPL-2.0 */
   2
   3/*
   4 * Copyright (c) 2020, Microsoft Corporation.
   5 * Pavel Tatashin <pasha.tatashin@soleen.com>
   6 */
   7
   8#ifndef _ASM_TRANS_TABLE_H
   9#define _ASM_TRANS_TABLE_H
  10
  11#include <linux/bits.h>
  12#include <linux/types.h>
  13#include <asm/pgtable-types.h>
  14
  15/*
  16 * trans_alloc_page
  17 *      - Allocator that should return exactly one zeroed page, if this
  18 *        allocator fails, trans_pgd_create_copy() and trans_pgd_map_page()
  19 *        return -ENOMEM error.
  20 *
  21 * trans_alloc_arg
  22 *      - Passed to trans_alloc_page as an argument
  23 */
  24
  25struct trans_pgd_info {
  26        void * (*trans_alloc_page)(void *arg);
  27        void *trans_alloc_arg;
  28};
  29
  30int trans_pgd_create_copy(struct trans_pgd_info *info, pgd_t **trans_pgd,
  31                          unsigned long start, unsigned long end);
  32
  33int trans_pgd_map_page(struct trans_pgd_info *info, pgd_t *trans_pgd,
  34                       void *page, unsigned long dst_addr, pgprot_t pgprot);
  35
  36int trans_pgd_idmap_page(struct trans_pgd_info *info, phys_addr_t *trans_ttbr0,
  37                         unsigned long *t0sz, void *page);
  38
  39#endif /* _ASM_TRANS_TABLE_H */
  40