| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _M68KNOMMU_PGTABLE_H |
| 3 | #define _M68KNOMMU_PGTABLE_H |
| 4 | |
| 5 | #include <asm-generic/4level-fixup.h> |
| 6 | |
| 7 | /* |
| 8 | * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com> |
| 9 | */ |
| 10 | |
| 11 | #include <linux/slab.h> |
| 12 | #include <asm/processor.h> |
| 13 | #include <asm/page.h> |
| 14 | #include <asm/io.h> |
| 15 | |
| 16 | /* |
| 17 | * Trivial page table functions. |
| 18 | */ |
| 19 | #define pgd_present(pgd) (1) |
| 20 | #define pgd_none(pgd) (0) |
| 21 | #define pgd_bad(pgd) (0) |
| 22 | #define pgd_clear(pgdp) |
| 23 | #define kern_addr_valid(addr) (1) |
| 24 | #define pmd_offset(a, b) ((void *)0) |
| 25 | |
| 26 | #define PAGE_NONE __pgprot(0) |
| 27 | #define PAGE_SHARED __pgprot(0) |
| 28 | #define PAGE_COPY __pgprot(0) |
| 29 | #define PAGE_READONLY __pgprot(0) |
| 30 | #define PAGE_KERNEL __pgprot(0) |
| 31 | |
| 32 | extern void paging_init(void); |
| 33 | #define swapper_pg_dir ((pgd_t *) 0) |
| 34 | |
| 35 | #define __swp_type(x) (0) |
| 36 | #define __swp_offset(x) (0) |
| 37 | #define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) }) |
| 38 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| 39 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| 40 | |
| 41 | /* |
| 42 | * ZERO_PAGE is a global shared page that is always zero: used |
| 43 | * for zero-mapped memory areas etc.. |
| 44 | */ |
| 45 | extern void *empty_zero_page; |
| 46 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 47 | |
| 48 | /* |
| 49 | * All 32bit addresses are effectively valid for vmalloc... |
| 50 | * Sort of meaningless for non-VM targets. |
| 51 | */ |
| 52 | #define VMALLOC_START 0 |
| 53 | #define VMALLOC_END 0xffffffff |
| 54 | #define KMAP_START 0 |
| 55 | #define KMAP_END 0xffffffff |
| 56 | |
| 57 | #include <asm-generic/pgtable.h> |
| 58 | |
| 59 | #endif /* _M68KNOMMU_PGTABLE_H */ |