Viewing file:  fixmap.h (1.5 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Western Digital Corporation or its affiliates.
*/
#ifndef _ASM_RISCV_FIXMAP_H
#define _ASM_RISCV_FIXMAP_H
#include <linux/kernel.h>
#include <linux/sizes.h>
#include <linux/pgtable.h>
#include <asm/page.h>
#ifdef CONFIG_MMU
/*
* Here we define all the compile-time 'special' virtual addresses.
* The point is to have a constant address at compile time, but to
* set the physical address only in the boot process.
*
* These 'compile-time allocated' memory buffers are page-sized. Use
* set_fixmap(idx,phys) to associate physical memory with fixmap indices.
*/
enum fixed_addresses {
FIX_HOLE,
FIX_PTE,
FIX_PMD,
FIX_TEXT_POKE1,
FIX_TEXT_POKE0,
FIX_EARLYCON_MEM_BASE,
__end_of_permanent_fixed_addresses,
/*
* Temporary boot-time mappings, used by early_ioremap(),
* before ioremap() is functional.
*/
#define NR_FIX_BTMAPS (SZ_256K / PAGE_SIZE)
#define FIX_BTMAPS_SLOTS 7
#define TOTAL_FIX_BTMAPS (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
__end_of_fixed_addresses
};
#define FIXMAP_PAGE_IO PAGE_KERNEL
#define __early_set_fixmap __set_fixmap
#define __late_set_fixmap __set_fixmap
#define __late_clear_fixmap(idx) __set_fixmap((idx), 0, FIXMAP_PAGE_CLEAR)
extern void __set_fixmap(enum fixed_addresses idx,
phys_addr_t phys, pgprot_t prot);
#include <asm-generic/fixmap.h>
#endif /* CONFIG_MMU */
#endif /* _ASM_RISCV_FIXMAP_H */
|