1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2023 Google LLC
3 // Author: Ard Biesheuvel <ardb@google.com>
4
5 #include <linux/types.h>
6
7 #define __prel64_initconst __section(".init.rodata.prel64")
8
9 #define PREL64(type, name) union { type *name; prel64_t name ## _prel; }
10
11 #define prel64_pointer(__d) (typeof(__d))prel64_to_pointer(&__d##_prel)
12
13 typedef volatile signed long prel64_t;
14
prel64_to_pointer(const prel64_t * offset)15 static inline void *prel64_to_pointer(const prel64_t *offset)
16 {
17 if (!*offset)
18 return NULL;
19 return (void *)offset + *offset;
20 }
21
22 extern bool dynamic_scs_is_enabled;
23
24 extern pgd_t init_idmap_pg_dir[], init_idmap_pg_end[];
25 extern pgd_t init_pg_dir[], init_pg_end[];
26
27 void init_feature_override(u64 boot_status, const void *fdt, int chosen);
28 u64 kaslr_early_init(void *fdt, int chosen);
29 void relocate_kernel(u64 offset);
30 int scs_patch(const u8 eh_frame[], int size);
31
32 void map_range(phys_addr_t *pte, u64 start, u64 end, phys_addr_t pa,
33 pgprot_t prot, int level, pte_t *tbl, bool may_use_cont,
34 u64 va_offset);
35
36 asmlinkage void early_map_kernel(u64 boot_status, phys_addr_t fdt);
37
38 asmlinkage phys_addr_t create_init_idmap(pgd_t *pgd, ptdesc_t clrmask);
39