diff options
| author | Greentime Hu <greentime@andestech.com> | 2017-10-24 14:53:31 +0800 |
|---|---|---|
| committer | Greentime Hu <greentime@andestech.com> | 2018-02-22 10:44:31 +0800 |
| commit | 2e1aecb970b7662cf3d53d2d18a54c17f1eb55b8 (patch) | |
| tree | 572eba03a7c2b99f672d74e9dbbe70a32a399104 /arch/nds32/include/asm/fixmap.h | |
| parent | 2923f5ea7738cb9f5372bb9d7ac9886cf4193003 (diff) | |
nds32: MMU definitions
This patch includes virtual memory layout, PHYS_OFFSET is defined as 0x0. It
also includes the 4KB/8KB page size configurations and pte operations.
Signed-off-by: Vincent Chen <vincentc@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/nds32/include/asm/fixmap.h')
| -rw-r--r-- | arch/nds32/include/asm/fixmap.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/fixmap.h b/arch/nds32/include/asm/fixmap.h new file mode 100644 index 000000000000..0e60e153a71a --- /dev/null +++ b/arch/nds32/include/asm/fixmap.h @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_FIXMAP_H +#define __ASM_NDS32_FIXMAP_H + +#ifdef CONFIG_HIGHMEM +#include <linux/threads.h> +#include <asm/kmap_types.h> +#endif + +enum fixed_addresses { + FIX_HOLE, + FIX_KMAP_RESERVED, + FIX_KMAP_BEGIN, +#ifdef CONFIG_HIGHMEM + FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS), +#endif + FIX_EARLYCON_MEM_BASE, + __end_of_fixed_addresses +}; +#define FIXADDR_TOP ((unsigned long) (-(16 * PAGE_SIZE))) +#define FIXADDR_SIZE ((__end_of_fixed_addresses) << PAGE_SHIFT) +#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) +#define FIXMAP_PAGE_IO __pgprot(PAGE_DEVICE) +void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); + +#include <asm-generic/fixmap.h> +#endif /* __ASM_NDS32_FIXMAP_H */ |