LXR linux/arch/riscv/include/asm/fixmap.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
   4 */
   5
   6#ifndef _ASM_RISCV_FIXMAP_H
   7#define _ASM_RISCV_FIXMAP_H
   8
   9#include <linux/kernel.h>
  10#include <linux/sizes.h>
  11#include <linux/pgtable.h>
  12#include <asm/page.h>
  13
  14#ifdef CONFIG_MMU
  15/*
  16 * Here we define all the compile-time 'special' virtual addresses.
  17 * The point is to have a constant address at compile time, but to
  18 * set the physical address only in the boot process.
  19 *
  20 * These 'compile-time allocated' memory buffers are page-sized. Use
  21 * set_fixmap(idx,phys) to associate physical memory with fixmap indices.
  22 */
  23enum fixed_addresses {
  24        FIX_HOLE,
  25#define FIX_FDT_SIZE    SZ_1M
  26        FIX_FDT_END,
  27        FIX_FDT = FIX_FDT_END + FIX_FDT_SIZE / PAGE_SIZE - 1,
  28        FIX_PTE,
  29        FIX_PMD,
  30        FIX_TEXT_POKE1,
  31        FIX_TEXT_POKE0,
  32        FIX_EARLYCON_MEM_BASE,
  33        __end_of_fixed_addresses
  34};
  35
  36#define FIXMAP_PAGE_IO          PAGE_KERNEL
  37
  38#define __early_set_fixmap      __set_fixmap
  39
  40#define __late_set_fixmap       __set_fixmap
  41#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
  42
  43extern void __set_fixmap(enum fixed_addresses idx,
  44                         phys_addr_t phys, pgprot_t prot);
  45
  46#include <asm-generic/fixmap.h>
  47
  48#endif /* CONFIG_MMU */
  49#endif /* _ASM_RISCV_FIXMAP_H */
  50