init.c (b7c15a3ce6fea5da3aa836c897a78ac628467d54) init.c (a35707c3d850dda0ceefb75b1b3bd191921d5765)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Regents of the University of California
4 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
5 * Copyright (C) 2020 FORTH-ICS/CARV
6 * Nick Kossifidis <mick@ics.forth.gr>
7 */
8

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203
204 reserve_initrd_mem();
205 /*
206 * If DTB is built in, no need to reserve its memblock.
207 * Otherwise, do reserve it but avoid using
208 * early_init_fdt_reserve_self() since __pa() does
209 * not work for DTB pointers that are fixmap addresses
210 */
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Regents of the University of California
4 * Copyright (C) 2019 Western Digital Corporation or its affiliates.
5 * Copyright (C) 2020 FORTH-ICS/CARV
6 * Nick Kossifidis <mick@ics.forth.gr>
7 */
8

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203
204 reserve_initrd_mem();
205 /*
206 * If DTB is built in, no need to reserve its memblock.
207 * Otherwise, do reserve it but avoid using
208 * early_init_fdt_reserve_self() since __pa() does
209 * not work for DTB pointers that are fixmap addresses
210 */
211 if (!IS_ENABLED(CONFIG_BUILTIN_DTB)) {
212 /*
213 * In case the DTB is not located in a memory region we won't
214 * be able to locate it later on via the linear mapping and
215 * get a segfault when accessing it via __va(dtb_early_pa).
216 * To avoid this situation copy DTB to a memory region.
217 * Note that memblock_phys_alloc will also reserve DTB region.
218 */
219 if (!memblock_is_memory(dtb_early_pa)) {
220 size_t fdt_size = fdt_totalsize(dtb_early_va);
221 phys_addr_t new_dtb_early_pa = memblock_phys_alloc(fdt_size, PAGE_SIZE);
222 void *new_dtb_early_va = early_memremap(new_dtb_early_pa, fdt_size);
211 if (!IS_ENABLED(CONFIG_BUILTIN_DTB))
212 memblock_reserve(dtb_early_pa, fdt_totalsize(dtb_early_va));
223
213
224 memcpy(new_dtb_early_va, dtb_early_va, fdt_size);
225 early_memunmap(new_dtb_early_va, fdt_size);
226 _dtb_early_pa = new_dtb_early_pa;
227 } else
228 memblock_reserve(dtb_early_pa, fdt_totalsize(dtb_early_va));
229 }
230
231 early_init_fdt_scan_reserved_mem();
232 dma_contiguous_reserve(dma32_phys_limit);
233 if (IS_ENABLED(CONFIG_64BIT))
234 hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
235 memblock_allow_resize();
236}
237
238#ifdef CONFIG_MMU

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730 csr_write(CSR_SATP, identity_satp);
731 hw_satp = csr_swap(CSR_SATP, 0ULL);
732 local_flush_tlb_all();
733
734 if (hw_satp != identity_satp) {
735 if (!check_l4) {
736 disable_pgtable_l5();
737 check_l4 = true;
214 early_init_fdt_scan_reserved_mem();
215 dma_contiguous_reserve(dma32_phys_limit);
216 if (IS_ENABLED(CONFIG_64BIT))
217 hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
218 memblock_allow_resize();
219}
220
221#ifdef CONFIG_MMU

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713 csr_write(CSR_SATP, identity_satp);
714 hw_satp = csr_swap(CSR_SATP, 0ULL);
715 local_flush_tlb_all();
716
717 if (hw_satp != identity_satp) {
718 if (!check_l4) {
719 disable_pgtable_l5();
720 check_l4 = true;
738 memset(early_pg_dir, 0, PAGE_SIZE);
739 goto retry;
740 }
741 disable_pgtable_l4();
742 }
743
744 memset(early_pg_dir, 0, PAGE_SIZE);
745 memset(early_p4d, 0, PAGE_SIZE);
746 memset(early_pud, 0, PAGE_SIZE);

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948#ifdef CONFIG_64BIT
949 /*
950 * The last 4K bytes of the addressable memory can not be mapped because
951 * of IS_ERR_VALUE macro.
952 */
953 BUG_ON((kernel_map.virt_addr + kernel_map.size) > ADDRESS_SPACE_END - SZ_4K);
954#endif
955
721 goto retry;
722 }
723 disable_pgtable_l4();
724 }
725
726 memset(early_pg_dir, 0, PAGE_SIZE);
727 memset(early_p4d, 0, PAGE_SIZE);
728 memset(early_pud, 0, PAGE_SIZE);

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930#ifdef CONFIG_64BIT
931 /*
932 * The last 4K bytes of the addressable memory can not be mapped because
933 * of IS_ERR_VALUE macro.
934 */
935 BUG_ON((kernel_map.virt_addr + kernel_map.size) > ADDRESS_SPACE_END - SZ_4K);
936#endif
937
938 apply_early_boot_alternatives();
956 pt_ops_set_early();
957
958 /* Setup early PGD for fixmap */
959 create_pgd_mapping(early_pg_dir, FIXADDR_START,
960 fixmap_pgd_next, PGDIR_SIZE, PAGE_TABLE);
961
962#ifndef __PAGETABLE_PMD_FOLDED
963 /* Setup fixmap P4D and PUD */

--- 227 unchanged lines hidden --- 		939 pt_ops_set_early();
940
941 /* Setup early PGD for fixmap */
942 create_pgd_mapping(early_pg_dir, FIXADDR_START,
943 fixmap_pgd_next, PGDIR_SIZE, PAGE_TABLE);
944
945#ifndef __PAGETABLE_PMD_FOLDED
946 /* Setup fixmap P4D and PUD */

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