2 * Based on arch/arm/mm/mmu.c
4 * Copyright (C) 1995-2005 Russell King
5 * Copyright (C) 2012 ARM Ltd.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <linux/cache.h>
21 #include <linux/export.h>
22 #include <linux/kernel.h>
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/libfdt.h>
26 #include <linux/mman.h>
27 #include <linux/nodemask.h>
28 #include <linux/memblock.h>
31 #include <linux/slab.h>
32 #include <linux/stop_machine.h>
34 #include <asm/barrier.h>
35 #include <asm/cputype.h>
36 #include <asm/fixmap.h>
37 #include <asm/kasan.h>
38 #include <asm/kernel-pgtable.h>
39 #include <asm/sections.h>
40 #include <asm/setup.h>
41 #include <asm/sizes.h>
43 #include <asm/memblock.h>
44 #include <asm/mmu_context.h>
48 u64 idmap_t0sz
= TCR_T0SZ(VA_BITS
);
50 u64 kimage_voffset __ro_after_init
;
51 EXPORT_SYMBOL(kimage_voffset
);
54 * Empty_zero_page is a special page that is used for zero-initialized data
57 unsigned long empty_zero_page
[PAGE_SIZE
/ sizeof(unsigned long)] __page_aligned_bss
;
58 EXPORT_SYMBOL(empty_zero_page
);
60 static pte_t bm_pte
[PTRS_PER_PTE
] __page_aligned_bss
;
61 static pmd_t bm_pmd
[PTRS_PER_PMD
] __page_aligned_bss __maybe_unused
;
62 static pud_t bm_pud
[PTRS_PER_PUD
] __page_aligned_bss __maybe_unused
;
64 pgprot_t
phys_mem_access_prot(struct file
*file
, unsigned long pfn
,
65 unsigned long size
, pgprot_t vma_prot
)
68 return pgprot_noncached(vma_prot
);
69 else if (file
->f_flags
& O_SYNC
)
70 return pgprot_writecombine(vma_prot
);
73 EXPORT_SYMBOL(phys_mem_access_prot
);
75 static phys_addr_t __init
early_pgtable_alloc(void)
80 phys
= memblock_alloc(PAGE_SIZE
, PAGE_SIZE
);
83 * The FIX_{PGD,PUD,PMD} slots may be in active use, but the FIX_PTE
84 * slot will be free, so we can (ab)use the FIX_PTE slot to initialise
87 ptr
= pte_set_fixmap(phys
);
89 memset(ptr
, 0, PAGE_SIZE
);
92 * Implicit barriers also ensure the zeroed page is visible to the page
100 static void alloc_init_pte(pmd_t
*pmd
, unsigned long addr
,
101 unsigned long end
, unsigned long pfn
,
103 phys_addr_t (*pgtable_alloc
)(void))
107 BUG_ON(pmd_sect(*pmd
));
108 if (pmd_none(*pmd
)) {
109 phys_addr_t pte_phys
;
110 BUG_ON(!pgtable_alloc
);
111 pte_phys
= pgtable_alloc();
112 pte
= pte_set_fixmap(pte_phys
);
113 __pmd_populate(pmd
, pte_phys
, PMD_TYPE_TABLE
);
116 BUG_ON(pmd_bad(*pmd
));
118 pte
= pte_set_fixmap_offset(pmd
, addr
);
120 set_pte(pte
, pfn_pte(pfn
, prot
));
122 } while (pte
++, addr
+= PAGE_SIZE
, addr
!= end
);
127 static void alloc_init_pmd(pud_t
*pud
, unsigned long addr
, unsigned long end
,
128 phys_addr_t phys
, pgprot_t prot
,
129 phys_addr_t (*pgtable_alloc
)(void),
130 bool allow_block_mappings
)
136 * Check for initial section mappings in the pgd/pud and remove them.
138 BUG_ON(pud_sect(*pud
));
139 if (pud_none(*pud
)) {
140 phys_addr_t pmd_phys
;
141 BUG_ON(!pgtable_alloc
);
142 pmd_phys
= pgtable_alloc();
143 pmd
= pmd_set_fixmap(pmd_phys
);
144 __pud_populate(pud
, pmd_phys
, PUD_TYPE_TABLE
);
147 BUG_ON(pud_bad(*pud
));
149 pmd
= pmd_set_fixmap_offset(pud
, addr
);
151 next
= pmd_addr_end(addr
, end
);
152 /* try section mapping first */
153 if (((addr
| next
| phys
) & ~SECTION_MASK
) == 0 &&
154 allow_block_mappings
) {
156 pmd_set_huge(pmd
, phys
, prot
);
158 * Check for previous table entries created during
159 * boot (__create_page_tables) and flush them.
161 if (!pmd_none(old_pmd
)) {
163 if (pmd_table(old_pmd
)) {
164 phys_addr_t table
= pmd_page_paddr(old_pmd
);
165 if (!WARN_ON_ONCE(slab_is_available()))
166 memblock_free(table
, PAGE_SIZE
);
170 alloc_init_pte(pmd
, addr
, next
, __phys_to_pfn(phys
),
171 prot
, pgtable_alloc
);
174 } while (pmd
++, addr
= next
, addr
!= end
);
179 static inline bool use_1G_block(unsigned long addr
, unsigned long next
,
182 if (PAGE_SHIFT
!= 12)
185 if (((addr
| next
| phys
) & ~PUD_MASK
) != 0)
191 static void alloc_init_pud(pgd_t
*pgd
, unsigned long addr
, unsigned long end
,
192 phys_addr_t phys
, pgprot_t prot
,
193 phys_addr_t (*pgtable_alloc
)(void),
194 bool allow_block_mappings
)
199 if (pgd_none(*pgd
)) {
200 phys_addr_t pud_phys
;
201 BUG_ON(!pgtable_alloc
);
202 pud_phys
= pgtable_alloc();
203 __pgd_populate(pgd
, pud_phys
, PUD_TYPE_TABLE
);
205 BUG_ON(pgd_bad(*pgd
));
207 pud
= pud_set_fixmap_offset(pgd
, addr
);
209 next
= pud_addr_end(addr
, end
);
212 * For 4K granule only, attempt to put down a 1GB block
214 if (use_1G_block(addr
, next
, phys
) && allow_block_mappings
) {
215 pud_t old_pud
= *pud
;
216 pud_set_huge(pud
, phys
, prot
);
219 * If we have an old value for a pud, it will
220 * be pointing to a pmd table that we no longer
221 * need (from swapper_pg_dir).
223 * Look up the old pmd table and free it.
225 if (!pud_none(old_pud
)) {
227 if (pud_table(old_pud
)) {
228 phys_addr_t table
= pud_page_paddr(old_pud
);
229 if (!WARN_ON_ONCE(slab_is_available()))
230 memblock_free(table
, PAGE_SIZE
);
234 alloc_init_pmd(pud
, addr
, next
, phys
, prot
,
235 pgtable_alloc
, allow_block_mappings
);
238 } while (pud
++, addr
= next
, addr
!= end
);
243 static void __create_pgd_mapping(pgd_t
*pgdir
, phys_addr_t phys
,
244 unsigned long virt
, phys_addr_t size
,
246 phys_addr_t (*pgtable_alloc
)(void),
247 bool allow_block_mappings
)
249 unsigned long addr
, length
, end
, next
;
250 pgd_t
*pgd
= pgd_offset_raw(pgdir
, virt
);
253 * If the virtual and physical address don't have the same offset
254 * within a page, we cannot map the region as the caller expects.
256 if (WARN_ON((phys
^ virt
) & ~PAGE_MASK
))
260 addr
= virt
& PAGE_MASK
;
261 length
= PAGE_ALIGN(size
+ (virt
& ~PAGE_MASK
));
265 next
= pgd_addr_end(addr
, end
);
266 alloc_init_pud(pgd
, addr
, next
, phys
, prot
, pgtable_alloc
,
267 allow_block_mappings
);
269 } while (pgd
++, addr
= next
, addr
!= end
);
272 static phys_addr_t
pgd_pgtable_alloc(void)
274 void *ptr
= (void *)__get_free_page(PGALLOC_GFP
);
275 if (!ptr
|| !pgtable_page_ctor(virt_to_page(ptr
)))
278 /* Ensure the zeroed page is visible to the page table walker */
284 * This function can only be used to modify existing table entries,
285 * without allocating new levels of table. Note that this permits the
286 * creation of new section or page entries.
288 static void __init
create_mapping_noalloc(phys_addr_t phys
, unsigned long virt
,
289 phys_addr_t size
, pgprot_t prot
)
291 if (virt
< VMALLOC_START
) {
292 pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n",
296 __create_pgd_mapping(init_mm
.pgd
, phys
, virt
, size
, prot
, NULL
, true);
299 void __init
create_pgd_mapping(struct mm_struct
*mm
, phys_addr_t phys
,
300 unsigned long virt
, phys_addr_t size
,
301 pgprot_t prot
, bool allow_block_mappings
)
303 BUG_ON(mm
== &init_mm
);
305 __create_pgd_mapping(mm
->pgd
, phys
, virt
, size
, prot
,
306 pgd_pgtable_alloc
, allow_block_mappings
);
309 static void create_mapping_late(phys_addr_t phys
, unsigned long virt
,
310 phys_addr_t size
, pgprot_t prot
)
312 if (virt
< VMALLOC_START
) {
313 pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n",
318 __create_pgd_mapping(init_mm
.pgd
, phys
, virt
, size
, prot
,
319 NULL
, !debug_pagealloc_enabled());
322 static void __init
__map_memblock(pgd_t
*pgd
, phys_addr_t start
, phys_addr_t end
)
324 unsigned long kernel_start
= __pa(_text
);
325 unsigned long kernel_end
= __pa(__init_begin
);
328 * Take care not to create a writable alias for the
329 * read-only text and rodata sections of the kernel image.
332 /* No overlap with the kernel text/rodata */
333 if (end
< kernel_start
|| start
>= kernel_end
) {
334 __create_pgd_mapping(pgd
, start
, __phys_to_virt(start
),
335 end
- start
, PAGE_KERNEL
,
337 !debug_pagealloc_enabled());
342 * This block overlaps the kernel text/rodata mappings.
343 * Map the portion(s) which don't overlap.
345 if (start
< kernel_start
)
346 __create_pgd_mapping(pgd
, start
,
347 __phys_to_virt(start
),
348 kernel_start
- start
, PAGE_KERNEL
,
350 !debug_pagealloc_enabled());
351 if (kernel_end
< end
)
352 __create_pgd_mapping(pgd
, kernel_end
,
353 __phys_to_virt(kernel_end
),
354 end
- kernel_end
, PAGE_KERNEL
,
356 !debug_pagealloc_enabled());
359 * Map the linear alias of the [_text, __init_begin) interval as
360 * read-only/non-executable. This makes the contents of the
361 * region accessible to subsystems such as hibernate, but
362 * protects it from inadvertent modification or execution.
364 __create_pgd_mapping(pgd
, kernel_start
, __phys_to_virt(kernel_start
),
365 kernel_end
- kernel_start
, PAGE_KERNEL_RO
,
366 early_pgtable_alloc
, !debug_pagealloc_enabled());
369 static void __init
map_mem(pgd_t
*pgd
)
371 struct memblock_region
*reg
;
373 /* map all the memory banks */
374 for_each_memblock(memory
, reg
) {
375 phys_addr_t start
= reg
->base
;
376 phys_addr_t end
= start
+ reg
->size
;
380 if (memblock_is_nomap(reg
))
383 __map_memblock(pgd
, start
, end
);
387 void mark_rodata_ro(void)
389 unsigned long section_size
;
391 section_size
= (unsigned long)_etext
- (unsigned long)_text
;
392 create_mapping_late(__pa(_text
), (unsigned long)_text
,
393 section_size
, PAGE_KERNEL_ROX
);
395 * mark .rodata as read only. Use __init_begin rather than __end_rodata
396 * to cover NOTES and EXCEPTION_TABLE.
398 section_size
= (unsigned long)__init_begin
- (unsigned long)__start_rodata
;
399 create_mapping_late(__pa(__start_rodata
), (unsigned long)__start_rodata
,
400 section_size
, PAGE_KERNEL_RO
);
403 void fixup_init(void)
406 * Unmap the __init region but leave the VM area in place. This
407 * prevents the region from being reused for kernel modules, which
408 * is not supported by kallsyms.
410 unmap_kernel_range((u64
)__init_begin
, (u64
)(__init_end
- __init_begin
));
413 static void __init
map_kernel_segment(pgd_t
*pgd
, void *va_start
, void *va_end
,
414 pgprot_t prot
, struct vm_struct
*vma
)
416 phys_addr_t pa_start
= __pa(va_start
);
417 unsigned long size
= va_end
- va_start
;
419 BUG_ON(!PAGE_ALIGNED(pa_start
));
420 BUG_ON(!PAGE_ALIGNED(size
));
422 __create_pgd_mapping(pgd
, pa_start
, (unsigned long)va_start
, size
, prot
,
423 early_pgtable_alloc
, !debug_pagealloc_enabled());
425 vma
->addr
= va_start
;
426 vma
->phys_addr
= pa_start
;
429 vma
->caller
= __builtin_return_address(0);
431 vm_area_add_early(vma
);
435 * Create fine-grained mappings for the kernel.
437 static void __init
map_kernel(pgd_t
*pgd
)
439 static struct vm_struct vmlinux_text
, vmlinux_rodata
, vmlinux_init
, vmlinux_data
;
441 map_kernel_segment(pgd
, _text
, _etext
, PAGE_KERNEL_EXEC
, &vmlinux_text
);
442 map_kernel_segment(pgd
, __start_rodata
, __init_begin
, PAGE_KERNEL
, &vmlinux_rodata
);
443 map_kernel_segment(pgd
, __init_begin
, __init_end
, PAGE_KERNEL_EXEC
,
445 map_kernel_segment(pgd
, _data
, _end
, PAGE_KERNEL
, &vmlinux_data
);
447 if (!pgd_val(*pgd_offset_raw(pgd
, FIXADDR_START
))) {
449 * The fixmap falls in a separate pgd to the kernel, and doesn't
450 * live in the carveout for the swapper_pg_dir. We can simply
451 * re-use the existing dir for the fixmap.
453 set_pgd(pgd_offset_raw(pgd
, FIXADDR_START
),
454 *pgd_offset_k(FIXADDR_START
));
455 } else if (CONFIG_PGTABLE_LEVELS
> 3) {
457 * The fixmap shares its top level pgd entry with the kernel
458 * mapping. This can really only occur when we are running
459 * with 16k/4 levels, so we can simply reuse the pud level
462 BUG_ON(!IS_ENABLED(CONFIG_ARM64_16K_PAGES
));
463 set_pud(pud_set_fixmap_offset(pgd
, FIXADDR_START
),
464 __pud(__pa(bm_pmd
) | PUD_TYPE_TABLE
));
470 kasan_copy_shadow(pgd
);
474 * paging_init() sets up the page tables, initialises the zone memory
475 * maps and sets up the zero page.
477 void __init
paging_init(void)
479 phys_addr_t pgd_phys
= early_pgtable_alloc();
480 pgd_t
*pgd
= pgd_set_fixmap(pgd_phys
);
486 * We want to reuse the original swapper_pg_dir so we don't have to
487 * communicate the new address to non-coherent secondaries in
488 * secondary_entry, and so cpu_switch_mm can generate the address with
489 * adrp+add rather than a load from some global variable.
491 * To do this we need to go via a temporary pgd.
493 cpu_replace_ttbr1(__va(pgd_phys
));
494 memcpy(swapper_pg_dir
, pgd
, PAGE_SIZE
);
495 cpu_replace_ttbr1(swapper_pg_dir
);
498 memblock_free(pgd_phys
, PAGE_SIZE
);
501 * We only reuse the PGD from the swapper_pg_dir, not the pud + pmd
504 memblock_free(__pa(swapper_pg_dir
) + PAGE_SIZE
,
505 SWAPPER_DIR_SIZE
- PAGE_SIZE
);
509 * Check whether a kernel address is valid (derived from arch/x86/).
511 int kern_addr_valid(unsigned long addr
)
518 if ((((long)addr
) >> VA_BITS
) != -1UL)
521 pgd
= pgd_offset_k(addr
);
525 pud
= pud_offset(pgd
, addr
);
530 return pfn_valid(pud_pfn(*pud
));
532 pmd
= pmd_offset(pud
, addr
);
537 return pfn_valid(pmd_pfn(*pmd
));
539 pte
= pte_offset_kernel(pmd
, addr
);
543 return pfn_valid(pte_pfn(*pte
));
545 #ifdef CONFIG_SPARSEMEM_VMEMMAP
546 #if !ARM64_SWAPPER_USES_SECTION_MAPS
547 int __meminit
vmemmap_populate(unsigned long start
, unsigned long end
, int node
)
549 return vmemmap_populate_basepages(start
, end
, node
);
551 #else /* !ARM64_SWAPPER_USES_SECTION_MAPS */
552 int __meminit
vmemmap_populate(unsigned long start
, unsigned long end
, int node
)
554 unsigned long addr
= start
;
561 next
= pmd_addr_end(addr
, end
);
563 pgd
= vmemmap_pgd_populate(addr
, node
);
567 pud
= vmemmap_pud_populate(pgd
, addr
, node
);
571 pmd
= pmd_offset(pud
, addr
);
572 if (pmd_none(*pmd
)) {
575 p
= vmemmap_alloc_block_buf(PMD_SIZE
, node
);
579 set_pmd(pmd
, __pmd(__pa(p
) | PROT_SECT_NORMAL
));
581 vmemmap_verify((pte_t
*)pmd
, node
, addr
, next
);
582 } while (addr
= next
, addr
!= end
);
586 #endif /* CONFIG_ARM64_64K_PAGES */
587 void vmemmap_free(unsigned long start
, unsigned long end
)
590 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
592 static inline pud_t
* fixmap_pud(unsigned long addr
)
594 pgd_t
*pgd
= pgd_offset_k(addr
);
596 BUG_ON(pgd_none(*pgd
) || pgd_bad(*pgd
));
598 return pud_offset_kimg(pgd
, addr
);
601 static inline pmd_t
* fixmap_pmd(unsigned long addr
)
603 pud_t
*pud
= fixmap_pud(addr
);
605 BUG_ON(pud_none(*pud
) || pud_bad(*pud
));
607 return pmd_offset_kimg(pud
, addr
);
610 static inline pte_t
* fixmap_pte(unsigned long addr
)
612 return &bm_pte
[pte_index(addr
)];
615 void __init
early_fixmap_init(void)
620 unsigned long addr
= FIXADDR_START
;
622 pgd
= pgd_offset_k(addr
);
623 if (CONFIG_PGTABLE_LEVELS
> 3 &&
624 !(pgd_none(*pgd
) || pgd_page_paddr(*pgd
) == __pa(bm_pud
))) {
626 * We only end up here if the kernel mapping and the fixmap
627 * share the top level pgd entry, which should only happen on
628 * 16k/4 levels configurations.
630 BUG_ON(!IS_ENABLED(CONFIG_ARM64_16K_PAGES
));
631 pud
= pud_offset_kimg(pgd
, addr
);
633 pgd_populate(&init_mm
, pgd
, bm_pud
);
634 pud
= fixmap_pud(addr
);
636 pud_populate(&init_mm
, pud
, bm_pmd
);
637 pmd
= fixmap_pmd(addr
);
638 pmd_populate_kernel(&init_mm
, pmd
, bm_pte
);
641 * The boot-ioremap range spans multiple pmds, for which
642 * we are not prepared:
644 BUILD_BUG_ON((__fix_to_virt(FIX_BTMAP_BEGIN
) >> PMD_SHIFT
)
645 != (__fix_to_virt(FIX_BTMAP_END
) >> PMD_SHIFT
));
647 if ((pmd
!= fixmap_pmd(fix_to_virt(FIX_BTMAP_BEGIN
)))
648 || pmd
!= fixmap_pmd(fix_to_virt(FIX_BTMAP_END
))) {
650 pr_warn("pmd %p != %p, %p\n",
651 pmd
, fixmap_pmd(fix_to_virt(FIX_BTMAP_BEGIN
)),
652 fixmap_pmd(fix_to_virt(FIX_BTMAP_END
)));
653 pr_warn("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
654 fix_to_virt(FIX_BTMAP_BEGIN
));
655 pr_warn("fix_to_virt(FIX_BTMAP_END): %08lx\n",
656 fix_to_virt(FIX_BTMAP_END
));
658 pr_warn("FIX_BTMAP_END: %d\n", FIX_BTMAP_END
);
659 pr_warn("FIX_BTMAP_BEGIN: %d\n", FIX_BTMAP_BEGIN
);
663 void __set_fixmap(enum fixed_addresses idx
,
664 phys_addr_t phys
, pgprot_t flags
)
666 unsigned long addr
= __fix_to_virt(idx
);
669 BUG_ON(idx
<= FIX_HOLE
|| idx
>= __end_of_fixed_addresses
);
671 pte
= fixmap_pte(addr
);
673 if (pgprot_val(flags
)) {
674 set_pte(pte
, pfn_pte(phys
>> PAGE_SHIFT
, flags
));
676 pte_clear(&init_mm
, addr
, pte
);
677 flush_tlb_kernel_range(addr
, addr
+PAGE_SIZE
);
681 void *__init
__fixmap_remap_fdt(phys_addr_t dt_phys
, int *size
, pgprot_t prot
)
683 const u64 dt_virt_base
= __fix_to_virt(FIX_FDT
);
688 * Check whether the physical FDT address is set and meets the minimum
689 * alignment requirement. Since we are relying on MIN_FDT_ALIGN to be
690 * at least 8 bytes so that we can always access the magic and size
691 * fields of the FDT header after mapping the first chunk, double check
692 * here if that is indeed the case.
694 BUILD_BUG_ON(MIN_FDT_ALIGN
< 8);
695 if (!dt_phys
|| dt_phys
% MIN_FDT_ALIGN
)
699 * Make sure that the FDT region can be mapped without the need to
700 * allocate additional translation table pages, so that it is safe
701 * to call create_mapping_noalloc() this early.
703 * On 64k pages, the FDT will be mapped using PTEs, so we need to
704 * be in the same PMD as the rest of the fixmap.
705 * On 4k pages, we'll use section mappings for the FDT so we only
706 * have to be in the same PUD.
708 BUILD_BUG_ON(dt_virt_base
% SZ_2M
);
710 BUILD_BUG_ON(__fix_to_virt(FIX_FDT_END
) >> SWAPPER_TABLE_SHIFT
!=
711 __fix_to_virt(FIX_BTMAP_BEGIN
) >> SWAPPER_TABLE_SHIFT
);
713 offset
= dt_phys
% SWAPPER_BLOCK_SIZE
;
714 dt_virt
= (void *)dt_virt_base
+ offset
;
716 /* map the first chunk so we can read the size from the header */
717 create_mapping_noalloc(round_down(dt_phys
, SWAPPER_BLOCK_SIZE
),
718 dt_virt_base
, SWAPPER_BLOCK_SIZE
, prot
);
720 if (fdt_magic(dt_virt
) != FDT_MAGIC
)
723 *size
= fdt_totalsize(dt_virt
);
724 if (*size
> MAX_FDT_SIZE
)
727 if (offset
+ *size
> SWAPPER_BLOCK_SIZE
)
728 create_mapping_noalloc(round_down(dt_phys
, SWAPPER_BLOCK_SIZE
), dt_virt_base
,
729 round_up(offset
+ *size
, SWAPPER_BLOCK_SIZE
), prot
);
734 void *__init
fixmap_remap_fdt(phys_addr_t dt_phys
)
739 dt_virt
= __fixmap_remap_fdt(dt_phys
, &size
, PAGE_KERNEL_RO
);
743 memblock_reserve(dt_phys
, size
);
747 int __init
arch_ioremap_pud_supported(void)
749 /* only 4k granule supports level 1 block mappings */
750 return IS_ENABLED(CONFIG_ARM64_4K_PAGES
);
753 int __init
arch_ioremap_pmd_supported(void)
758 int pud_set_huge(pud_t
*pud
, phys_addr_t phys
, pgprot_t prot
)
760 BUG_ON(phys
& ~PUD_MASK
);
761 set_pud(pud
, __pud(phys
| PUD_TYPE_SECT
| pgprot_val(mk_sect_prot(prot
))));
765 int pmd_set_huge(pmd_t
*pmd
, phys_addr_t phys
, pgprot_t prot
)
767 BUG_ON(phys
& ~PMD_MASK
);
768 set_pmd(pmd
, __pmd(phys
| PMD_TYPE_SECT
| pgprot_val(mk_sect_prot(prot
))));
772 int pud_clear_huge(pud_t
*pud
)
780 int pmd_clear_huge(pmd_t
*pmd
)