cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fixmap.h (1518B)

      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	FIX_PTE,
     26	FIX_PMD,
     27	FIX_PUD,
     28	FIX_P4D,
     29	FIX_TEXT_POKE1,
     30	FIX_TEXT_POKE0,
     31	FIX_EARLYCON_MEM_BASE,
     32
     33	__end_of_permanent_fixed_addresses,
     34	/*
     35	 * Temporary boot-time mappings, used by early_ioremap(),
     36	 * before ioremap() is functional.
     37	 */
     38#define NR_FIX_BTMAPS		(SZ_256K / PAGE_SIZE)
     39#define FIX_BTMAPS_SLOTS	7
     40#define TOTAL_FIX_BTMAPS	(NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
     41
     42	FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
     43	FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
     44
     45	__end_of_fixed_addresses
     46};
     47
     48#define __early_set_fixmap	__set_fixmap
     49
     50#define __late_set_fixmap	__set_fixmap
     51#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
     52
     53extern void __set_fixmap(enum fixed_addresses idx,
     54			 phys_addr_t phys, pgprot_t prot);
     55
     56#include <asm-generic/fixmap.h>
     57
     58#endif /* CONFIG_MMU */
     59#endif /* _ASM_RISCV_FIXMAP_H */