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>
32 #include <asm/barrier.h>
33 #include <asm/cputype.h>
34 #include <asm/fixmap.h>
35 #include <asm/kasan.h>
36 #include <asm/kernel-pgtable.h>
37 #include <asm/sections.h>
38 #include <asm/setup.h>
39 #include <asm/sizes.h>
41 #include <asm/memblock.h>
42 #include <asm/mmu_context.h>
43 #include <asm/ptdump.h>
45 u64 idmap_t0sz
= TCR_T0SZ(VA_BITS
);
47 u64 kimage_voffset __ro_after_init
;
48 EXPORT_SYMBOL(kimage_voffset
);
51 * Empty_zero_page is a special page that is used for zero-initialized data
54 unsigned long empty_zero_page
[PAGE_SIZE
/ sizeof(unsigned long)] __page_aligned_bss
;
55 EXPORT_SYMBOL(empty_zero_page
);
57 static pte_t bm_pte
[PTRS_PER_PTE
] __page_aligned_bss
;
58 static pmd_t bm_pmd
[PTRS_PER_PMD
] __page_aligned_bss __maybe_unused
;
59 static pud_t bm_pud
[PTRS_PER_PUD
] __page_aligned_bss __maybe_unused
;
61 pgprot_t
phys_mem_access_prot(struct file
*file
, unsigned long pfn
,
62 unsigned long size
, pgprot_t vma_prot
)
65 return pgprot_noncached(vma_prot
);
66 else if (file
->f_flags
& O_SYNC
)
67 return pgprot_writecombine(vma_prot
);
70 EXPORT_SYMBOL(phys_mem_access_prot
);
72 static phys_addr_t __init
early_pgtable_alloc(void)
77 phys
= memblock_alloc(PAGE_SIZE
, PAGE_SIZE
);
80 * The FIX_{PGD,PUD,PMD} slots may be in active use, but the FIX_PTE
81 * slot will be free, so we can (ab)use the FIX_PTE slot to initialise
84 ptr
= pte_set_fixmap(phys
);
86 memset(ptr
, 0, PAGE_SIZE
);
89 * Implicit barriers also ensure the zeroed page is visible to the page
97 static bool pgattr_change_is_safe(u64 old
, u64
new)
100 * The following mapping attributes may be updated in live
101 * kernel mappings without the need for break-before-make.
103 static const pteval_t mask
= PTE_PXN
| PTE_RDONLY
| PTE_WRITE
;
105 return old
== 0 || new == 0 || ((old
^ new) & ~mask
) == 0;
108 static void alloc_init_pte(pmd_t
*pmd
, unsigned long addr
,
109 unsigned long end
, unsigned long pfn
,
111 phys_addr_t (*pgtable_alloc
)(void))
115 BUG_ON(pmd_sect(*pmd
));
116 if (pmd_none(*pmd
)) {
117 phys_addr_t pte_phys
;
118 BUG_ON(!pgtable_alloc
);
119 pte_phys
= pgtable_alloc();
120 pte
= pte_set_fixmap(pte_phys
);
121 __pmd_populate(pmd
, pte_phys
, PMD_TYPE_TABLE
);
124 BUG_ON(pmd_bad(*pmd
));
126 pte
= pte_set_fixmap_offset(pmd
, addr
);
128 pte_t old_pte
= *pte
;
130 set_pte(pte
, pfn_pte(pfn
, prot
));
134 * After the PTE entry has been populated once, we
135 * only allow updates to the permission attributes.
137 BUG_ON(!pgattr_change_is_safe(pte_val(old_pte
), pte_val(*pte
)));
139 } while (pte
++, addr
+= PAGE_SIZE
, addr
!= end
);
144 static void alloc_init_pmd(pud_t
*pud
, unsigned long addr
, unsigned long end
,
145 phys_addr_t phys
, pgprot_t prot
,
146 phys_addr_t (*pgtable_alloc
)(void),
147 bool page_mappings_only
)
153 * Check for initial section mappings in the pgd/pud and remove them.
155 BUG_ON(pud_sect(*pud
));
156 if (pud_none(*pud
)) {
157 phys_addr_t pmd_phys
;
158 BUG_ON(!pgtable_alloc
);
159 pmd_phys
= pgtable_alloc();
160 pmd
= pmd_set_fixmap(pmd_phys
);
161 __pud_populate(pud
, pmd_phys
, PUD_TYPE_TABLE
);
164 BUG_ON(pud_bad(*pud
));
166 pmd
= pmd_set_fixmap_offset(pud
, addr
);
168 pmd_t old_pmd
= *pmd
;
170 next
= pmd_addr_end(addr
, end
);
172 /* try section mapping first */
173 if (((addr
| next
| phys
) & ~SECTION_MASK
) == 0 &&
174 !page_mappings_only
) {
175 pmd_set_huge(pmd
, phys
, prot
);
178 * After the PMD entry has been populated once, we
179 * only allow updates to the permission attributes.
181 BUG_ON(!pgattr_change_is_safe(pmd_val(old_pmd
),
184 alloc_init_pte(pmd
, addr
, next
, __phys_to_pfn(phys
),
185 prot
, pgtable_alloc
);
187 BUG_ON(pmd_val(old_pmd
) != 0 &&
188 pmd_val(old_pmd
) != pmd_val(*pmd
));
191 } while (pmd
++, addr
= next
, addr
!= end
);
196 static inline bool use_1G_block(unsigned long addr
, unsigned long next
,
199 if (PAGE_SHIFT
!= 12)
202 if (((addr
| next
| phys
) & ~PUD_MASK
) != 0)
208 static void alloc_init_pud(pgd_t
*pgd
, unsigned long addr
, unsigned long end
,
209 phys_addr_t phys
, pgprot_t prot
,
210 phys_addr_t (*pgtable_alloc
)(void),
211 bool page_mappings_only
)
216 if (pgd_none(*pgd
)) {
217 phys_addr_t pud_phys
;
218 BUG_ON(!pgtable_alloc
);
219 pud_phys
= pgtable_alloc();
220 __pgd_populate(pgd
, pud_phys
, PUD_TYPE_TABLE
);
222 BUG_ON(pgd_bad(*pgd
));
224 pud
= pud_set_fixmap_offset(pgd
, addr
);
226 pud_t old_pud
= *pud
;
228 next
= pud_addr_end(addr
, end
);
231 * For 4K granule only, attempt to put down a 1GB block
233 if (use_1G_block(addr
, next
, phys
) && !page_mappings_only
) {
234 pud_set_huge(pud
, phys
, prot
);
237 * After the PUD entry has been populated once, we
238 * only allow updates to the permission attributes.
240 BUG_ON(!pgattr_change_is_safe(pud_val(old_pud
),
243 alloc_init_pmd(pud
, addr
, next
, phys
, prot
,
244 pgtable_alloc
, page_mappings_only
);
246 BUG_ON(pud_val(old_pud
) != 0 &&
247 pud_val(old_pud
) != pud_val(*pud
));
250 } while (pud
++, addr
= next
, addr
!= end
);
255 static void __create_pgd_mapping(pgd_t
*pgdir
, phys_addr_t phys
,
256 unsigned long virt
, phys_addr_t size
,
258 phys_addr_t (*pgtable_alloc
)(void),
259 bool page_mappings_only
)
261 unsigned long addr
, length
, end
, next
;
262 pgd_t
*pgd
= pgd_offset_raw(pgdir
, virt
);
265 * If the virtual and physical address don't have the same offset
266 * within a page, we cannot map the region as the caller expects.
268 if (WARN_ON((phys
^ virt
) & ~PAGE_MASK
))
272 addr
= virt
& PAGE_MASK
;
273 length
= PAGE_ALIGN(size
+ (virt
& ~PAGE_MASK
));
277 next
= pgd_addr_end(addr
, end
);
278 alloc_init_pud(pgd
, addr
, next
, phys
, prot
, pgtable_alloc
,
281 } while (pgd
++, addr
= next
, addr
!= end
);
284 static phys_addr_t
pgd_pgtable_alloc(void)
286 void *ptr
= (void *)__get_free_page(PGALLOC_GFP
);
287 if (!ptr
|| !pgtable_page_ctor(virt_to_page(ptr
)))
290 /* Ensure the zeroed page is visible to the page table walker */
296 * This function can only be used to modify existing table entries,
297 * without allocating new levels of table. Note that this permits the
298 * creation of new section or page entries.
300 static void __init
create_mapping_noalloc(phys_addr_t phys
, unsigned long virt
,
301 phys_addr_t size
, pgprot_t prot
)
303 if (virt
< VMALLOC_START
) {
304 pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n",
308 __create_pgd_mapping(init_mm
.pgd
, phys
, virt
, size
, prot
, NULL
, false);
311 void __init
create_pgd_mapping(struct mm_struct
*mm
, phys_addr_t phys
,
312 unsigned long virt
, phys_addr_t size
,
313 pgprot_t prot
, bool page_mappings_only
)
315 BUG_ON(mm
== &init_mm
);
317 __create_pgd_mapping(mm
->pgd
, phys
, virt
, size
, prot
,
318 pgd_pgtable_alloc
, page_mappings_only
);
321 static void create_mapping_late(phys_addr_t phys
, unsigned long virt
,
322 phys_addr_t size
, pgprot_t prot
)
324 if (virt
< VMALLOC_START
) {
325 pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n",
330 __create_pgd_mapping(init_mm
.pgd
, phys
, virt
, size
, prot
,
331 NULL
, debug_pagealloc_enabled());
334 static void __init
__map_memblock(pgd_t
*pgd
, phys_addr_t start
, phys_addr_t end
)
336 unsigned long kernel_start
= __pa(_text
);
337 unsigned long kernel_end
= __pa(__init_begin
);
340 * Take care not to create a writable alias for the
341 * read-only text and rodata sections of the kernel image.
344 /* No overlap with the kernel text/rodata */
345 if (end
< kernel_start
|| start
>= kernel_end
) {
346 __create_pgd_mapping(pgd
, start
, __phys_to_virt(start
),
347 end
- start
, PAGE_KERNEL
,
349 debug_pagealloc_enabled());
354 * This block overlaps the kernel text/rodata mappings.
355 * Map the portion(s) which don't overlap.
357 if (start
< kernel_start
)
358 __create_pgd_mapping(pgd
, start
,
359 __phys_to_virt(start
),
360 kernel_start
- start
, PAGE_KERNEL
,
362 debug_pagealloc_enabled());
363 if (kernel_end
< end
)
364 __create_pgd_mapping(pgd
, kernel_end
,
365 __phys_to_virt(kernel_end
),
366 end
- kernel_end
, PAGE_KERNEL
,
368 debug_pagealloc_enabled());
371 * Map the linear alias of the [_text, __init_begin) interval as
372 * read-only/non-executable. This makes the contents of the
373 * region accessible to subsystems such as hibernate, but
374 * protects it from inadvertent modification or execution.
376 __create_pgd_mapping(pgd
, kernel_start
, __phys_to_virt(kernel_start
),
377 kernel_end
- kernel_start
, PAGE_KERNEL_RO
,
378 early_pgtable_alloc
, debug_pagealloc_enabled());
381 static void __init
map_mem(pgd_t
*pgd
)
383 struct memblock_region
*reg
;
385 /* map all the memory banks */
386 for_each_memblock(memory
, reg
) {
387 phys_addr_t start
= reg
->base
;
388 phys_addr_t end
= start
+ reg
->size
;
392 if (memblock_is_nomap(reg
))
395 __map_memblock(pgd
, start
, end
);
399 void mark_rodata_ro(void)
401 unsigned long section_size
;
403 section_size
= (unsigned long)_etext
- (unsigned long)_text
;
404 create_mapping_late(__pa(_text
), (unsigned long)_text
,
405 section_size
, PAGE_KERNEL_ROX
);
407 * mark .rodata as read only. Use __init_begin rather than __end_rodata
408 * to cover NOTES and EXCEPTION_TABLE.
410 section_size
= (unsigned long)__init_begin
- (unsigned long)__start_rodata
;
411 create_mapping_late(__pa(__start_rodata
), (unsigned long)__start_rodata
,
412 section_size
, PAGE_KERNEL_RO
);
414 /* flush the TLBs after updating live kernel mappings */
420 static void __init
map_kernel_segment(pgd_t
*pgd
, void *va_start
, void *va_end
,
421 pgprot_t prot
, struct vm_struct
*vma
)
423 phys_addr_t pa_start
= __pa(va_start
);
424 unsigned long size
= va_end
- va_start
;
426 BUG_ON(!PAGE_ALIGNED(pa_start
));
427 BUG_ON(!PAGE_ALIGNED(size
));
429 __create_pgd_mapping(pgd
, pa_start
, (unsigned long)va_start
, size
, prot
,
430 early_pgtable_alloc
, debug_pagealloc_enabled());
432 vma
->addr
= va_start
;
433 vma
->phys_addr
= pa_start
;
436 vma
->caller
= __builtin_return_address(0);
438 vm_area_add_early(vma
);
442 * Create fine-grained mappings for the kernel.
444 static void __init
map_kernel(pgd_t
*pgd
)
446 static struct vm_struct vmlinux_text
, vmlinux_rodata
, vmlinux_init
, vmlinux_data
;
448 map_kernel_segment(pgd
, _text
, _etext
, PAGE_KERNEL_EXEC
, &vmlinux_text
);
449 map_kernel_segment(pgd
, __start_rodata
, __init_begin
, PAGE_KERNEL
, &vmlinux_rodata
);
450 map_kernel_segment(pgd
, __init_begin
, __init_end
, PAGE_KERNEL_EXEC
,
452 map_kernel_segment(pgd
, _data
, _end
, PAGE_KERNEL
, &vmlinux_data
);
454 if (!pgd_val(*pgd_offset_raw(pgd
, FIXADDR_START
))) {
456 * The fixmap falls in a separate pgd to the kernel, and doesn't
457 * live in the carveout for the swapper_pg_dir. We can simply
458 * re-use the existing dir for the fixmap.
460 set_pgd(pgd_offset_raw(pgd
, FIXADDR_START
),
461 *pgd_offset_k(FIXADDR_START
));
462 } else if (CONFIG_PGTABLE_LEVELS
> 3) {
464 * The fixmap shares its top level pgd entry with the kernel
465 * mapping. This can really only occur when we are running
466 * with 16k/4 levels, so we can simply reuse the pud level
469 BUG_ON(!IS_ENABLED(CONFIG_ARM64_16K_PAGES
));
470 set_pud(pud_set_fixmap_offset(pgd
, FIXADDR_START
),
471 __pud(__pa(bm_pmd
) | PUD_TYPE_TABLE
));
477 kasan_copy_shadow(pgd
);
481 * paging_init() sets up the page tables, initialises the zone memory
482 * maps and sets up the zero page.
484 void __init
paging_init(void)
486 phys_addr_t pgd_phys
= early_pgtable_alloc();
487 pgd_t
*pgd
= pgd_set_fixmap(pgd_phys
);
493 * We want to reuse the original swapper_pg_dir so we don't have to
494 * communicate the new address to non-coherent secondaries in
495 * secondary_entry, and so cpu_switch_mm can generate the address with
496 * adrp+add rather than a load from some global variable.
498 * To do this we need to go via a temporary pgd.
500 cpu_replace_ttbr1(__va(pgd_phys
));
501 memcpy(swapper_pg_dir
, pgd
, PAGE_SIZE
);
502 cpu_replace_ttbr1(swapper_pg_dir
);
505 memblock_free(pgd_phys
, PAGE_SIZE
);
508 * We only reuse the PGD from the swapper_pg_dir, not the pud + pmd
511 memblock_free(__pa(swapper_pg_dir
) + PAGE_SIZE
,
512 SWAPPER_DIR_SIZE
- PAGE_SIZE
);
516 * Check whether a kernel address is valid (derived from arch/x86/).
518 int kern_addr_valid(unsigned long addr
)
525 if ((((long)addr
) >> VA_BITS
) != -1UL)
528 pgd
= pgd_offset_k(addr
);
532 pud
= pud_offset(pgd
, addr
);
537 return pfn_valid(pud_pfn(*pud
));
539 pmd
= pmd_offset(pud
, addr
);
544 return pfn_valid(pmd_pfn(*pmd
));
546 pte
= pte_offset_kernel(pmd
, addr
);
550 return pfn_valid(pte_pfn(*pte
));
552 #ifdef CONFIG_SPARSEMEM_VMEMMAP
553 #if !ARM64_SWAPPER_USES_SECTION_MAPS
554 int __meminit
vmemmap_populate(unsigned long start
, unsigned long end
, int node
)
556 return vmemmap_populate_basepages(start
, end
, node
);
558 #else /* !ARM64_SWAPPER_USES_SECTION_MAPS */
559 int __meminit
vmemmap_populate(unsigned long start
, unsigned long end
, int node
)
561 unsigned long addr
= start
;
568 next
= pmd_addr_end(addr
, end
);
570 pgd
= vmemmap_pgd_populate(addr
, node
);
574 pud
= vmemmap_pud_populate(pgd
, addr
, node
);
578 pmd
= pmd_offset(pud
, addr
);
579 if (pmd_none(*pmd
)) {
582 p
= vmemmap_alloc_block_buf(PMD_SIZE
, node
);
586 set_pmd(pmd
, __pmd(__pa(p
) | PROT_SECT_NORMAL
));
588 vmemmap_verify((pte_t
*)pmd
, node
, addr
, next
);
589 } while (addr
= next
, addr
!= end
);
593 #endif /* CONFIG_ARM64_64K_PAGES */
594 void vmemmap_free(unsigned long start
, unsigned long end
)
597 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
599 static inline pud_t
* fixmap_pud(unsigned long addr
)
601 pgd_t
*pgd
= pgd_offset_k(addr
);
603 BUG_ON(pgd_none(*pgd
) || pgd_bad(*pgd
));
605 return pud_offset_kimg(pgd
, addr
);
608 static inline pmd_t
* fixmap_pmd(unsigned long addr
)
610 pud_t
*pud
= fixmap_pud(addr
);
612 BUG_ON(pud_none(*pud
) || pud_bad(*pud
));
614 return pmd_offset_kimg(pud
, addr
);
617 static inline pte_t
* fixmap_pte(unsigned long addr
)
619 return &bm_pte
[pte_index(addr
)];
622 void __init
early_fixmap_init(void)
627 unsigned long addr
= FIXADDR_START
;
629 pgd
= pgd_offset_k(addr
);
630 if (CONFIG_PGTABLE_LEVELS
> 3 &&
631 !(pgd_none(*pgd
) || pgd_page_paddr(*pgd
) == __pa(bm_pud
))) {
633 * We only end up here if the kernel mapping and the fixmap
634 * share the top level pgd entry, which should only happen on
635 * 16k/4 levels configurations.
637 BUG_ON(!IS_ENABLED(CONFIG_ARM64_16K_PAGES
));
638 pud
= pud_offset_kimg(pgd
, addr
);
640 pgd_populate(&init_mm
, pgd
, bm_pud
);
641 pud
= fixmap_pud(addr
);
643 pud_populate(&init_mm
, pud
, bm_pmd
);
644 pmd
= fixmap_pmd(addr
);
645 pmd_populate_kernel(&init_mm
, pmd
, bm_pte
);
648 * The boot-ioremap range spans multiple pmds, for which
649 * we are not prepared:
651 BUILD_BUG_ON((__fix_to_virt(FIX_BTMAP_BEGIN
) >> PMD_SHIFT
)
652 != (__fix_to_virt(FIX_BTMAP_END
) >> PMD_SHIFT
));
654 if ((pmd
!= fixmap_pmd(fix_to_virt(FIX_BTMAP_BEGIN
)))
655 || pmd
!= fixmap_pmd(fix_to_virt(FIX_BTMAP_END
))) {
657 pr_warn("pmd %p != %p, %p\n",
658 pmd
, fixmap_pmd(fix_to_virt(FIX_BTMAP_BEGIN
)),
659 fixmap_pmd(fix_to_virt(FIX_BTMAP_END
)));
660 pr_warn("fix_to_virt(FIX_BTMAP_BEGIN): %08lx\n",
661 fix_to_virt(FIX_BTMAP_BEGIN
));
662 pr_warn("fix_to_virt(FIX_BTMAP_END): %08lx\n",
663 fix_to_virt(FIX_BTMAP_END
));
665 pr_warn("FIX_BTMAP_END: %d\n", FIX_BTMAP_END
);
666 pr_warn("FIX_BTMAP_BEGIN: %d\n", FIX_BTMAP_BEGIN
);
670 void __set_fixmap(enum fixed_addresses idx
,
671 phys_addr_t phys
, pgprot_t flags
)
673 unsigned long addr
= __fix_to_virt(idx
);
676 BUG_ON(idx
<= FIX_HOLE
|| idx
>= __end_of_fixed_addresses
);
678 pte
= fixmap_pte(addr
);
680 if (pgprot_val(flags
)) {
681 set_pte(pte
, pfn_pte(phys
>> PAGE_SHIFT
, flags
));
683 pte_clear(&init_mm
, addr
, pte
);
684 flush_tlb_kernel_range(addr
, addr
+PAGE_SIZE
);
688 void *__init
__fixmap_remap_fdt(phys_addr_t dt_phys
, int *size
, pgprot_t prot
)
690 const u64 dt_virt_base
= __fix_to_virt(FIX_FDT
);
695 * Check whether the physical FDT address is set and meets the minimum
696 * alignment requirement. Since we are relying on MIN_FDT_ALIGN to be
697 * at least 8 bytes so that we can always access the magic and size
698 * fields of the FDT header after mapping the first chunk, double check
699 * here if that is indeed the case.
701 BUILD_BUG_ON(MIN_FDT_ALIGN
< 8);
702 if (!dt_phys
|| dt_phys
% MIN_FDT_ALIGN
)
706 * Make sure that the FDT region can be mapped without the need to
707 * allocate additional translation table pages, so that it is safe
708 * to call create_mapping_noalloc() this early.
710 * On 64k pages, the FDT will be mapped using PTEs, so we need to
711 * be in the same PMD as the rest of the fixmap.
712 * On 4k pages, we'll use section mappings for the FDT so we only
713 * have to be in the same PUD.
715 BUILD_BUG_ON(dt_virt_base
% SZ_2M
);
717 BUILD_BUG_ON(__fix_to_virt(FIX_FDT_END
) >> SWAPPER_TABLE_SHIFT
!=
718 __fix_to_virt(FIX_BTMAP_BEGIN
) >> SWAPPER_TABLE_SHIFT
);
720 offset
= dt_phys
% SWAPPER_BLOCK_SIZE
;
721 dt_virt
= (void *)dt_virt_base
+ offset
;
723 /* map the first chunk so we can read the size from the header */
724 create_mapping_noalloc(round_down(dt_phys
, SWAPPER_BLOCK_SIZE
),
725 dt_virt_base
, SWAPPER_BLOCK_SIZE
, prot
);
727 if (fdt_magic(dt_virt
) != FDT_MAGIC
)
730 *size
= fdt_totalsize(dt_virt
);
731 if (*size
> MAX_FDT_SIZE
)
734 if (offset
+ *size
> SWAPPER_BLOCK_SIZE
)
735 create_mapping_noalloc(round_down(dt_phys
, SWAPPER_BLOCK_SIZE
), dt_virt_base
,
736 round_up(offset
+ *size
, SWAPPER_BLOCK_SIZE
), prot
);
741 void *__init
fixmap_remap_fdt(phys_addr_t dt_phys
)
746 dt_virt
= __fixmap_remap_fdt(dt_phys
, &size
, PAGE_KERNEL_RO
);
750 memblock_reserve(dt_phys
, size
);
754 int __init
arch_ioremap_pud_supported(void)
756 /* only 4k granule supports level 1 block mappings */
757 return IS_ENABLED(CONFIG_ARM64_4K_PAGES
);
760 int __init
arch_ioremap_pmd_supported(void)
765 int pud_set_huge(pud_t
*pud
, phys_addr_t phys
, pgprot_t prot
)
767 BUG_ON(phys
& ~PUD_MASK
);
768 set_pud(pud
, __pud(phys
| PUD_TYPE_SECT
| pgprot_val(mk_sect_prot(prot
))));
772 int pmd_set_huge(pmd_t
*pmd
, phys_addr_t phys
, pgprot_t prot
)
774 BUG_ON(phys
& ~PMD_MASK
);
775 set_pmd(pmd
, __pmd(phys
| PMD_TYPE_SECT
| pgprot_val(mk_sect_prot(prot
))));
779 int pud_clear_huge(pud_t
*pud
)
787 int pmd_clear_huge(pmd_t
*pmd
)