| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _M68KNOMMU_PGTABLE_H |
| #define _M68KNOMMU_PGTABLE_H |
| |
| #include <asm-generic/pgtable-nopud.h> |
| |
| /* |
| * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com> |
| */ |
| |
| #include <linux/slab.h> |
| #include <asm/processor.h> |
| #include <asm/page.h> |
| #include <asm/io.h> |
| |
| /* |
| * Trivial page table functions. |
| */ |
| #define pgd_present(pgd) (1) |
| #define pgd_none(pgd) (0) |
| #define pgd_bad(pgd) (0) |
| #define pgd_clear(pgdp) |
| #define pmd_offset(a, b) ((void *)0) |
| |
| #define PAGE_NONE __pgprot(0) |
| #define PAGE_SHARED __pgprot(0) |
| #define PAGE_COPY __pgprot(0) |
| #define PAGE_READONLY __pgprot(0) |
| #define PAGE_KERNEL __pgprot(0) |
| |
| extern void paging_init(void); |
| #define swapper_pg_dir ((pgd_t *) 0) |
| |
| /* |
| * ZERO_PAGE is a global shared page that is always zero: used |
| * for zero-mapped memory areas etc.. |
| */ |
| extern void *empty_zero_page; |
| #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| |
| /* |
| * All 32bit addresses are effectively valid for vmalloc... |
| * Sort of meaningless for non-VM targets. |
| */ |
| #define VMALLOC_START 0 |
| #define VMALLOC_END 0xffffffff |
| #define KMAP_START 0 |
| #define KMAP_END 0xffffffff |
| |
| #endif /* _M68KNOMMU_PGTABLE_H */ |
