diff options
Diffstat (limited to 'arch/riscv/include/asm')
-rw-r--r-- | arch/riscv/include/asm/fixmap.h | 44 | ||||
-rw-r--r-- | arch/riscv/include/asm/pgtable.h | 1 |
2 files changed, 45 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/fixmap.h b/arch/riscv/include/asm/fixmap.h new file mode 100644 index 000000000000..57afe604b495 --- /dev/null +++ b/arch/riscv/include/asm/fixmap.h @@ -0,0 +1,44 @@ +/* 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 <asm/page.h> +#include <asm/pgtable.h> + +/* + * 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_EARLYCON_MEM_BASE, + __end_of_fixed_addresses +}; + +#define FIXADDR_SIZE (__end_of_fixed_addresses * PAGE_SIZE) +#define FIXADDR_TOP (PAGE_OFFSET) +#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) + +#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 /* _ASM_RISCV_FIXMAP_H */ diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index a8179a8c1491..1141364d990e 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -404,6 +404,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, #define kern_addr_valid(addr) (1) /* FIXME */ #endif +extern void setup_bootmem(void); extern void paging_init(void); static inline void pgtable_cache_init(void) |