// SPDX-License-Identifier: GPL-2.0-only
// Copyright 2023 Google LLC
// Author: Ard Biesheuvel <ardb@google.com>

#include <linux/types.h>

#define __prel64_initconst      __section(".init.rodata.prel64")

#define PREL64(type, name)      union { type *name; prel64_t name ## _prel; }

#define prel64_pointer(__d)     (typeof(__d))prel64_to_pointer(&__d##_prel)

typedef volatile signed long prel64_t;

static inline void *prel64_to_pointer(const prel64_t *offset)
{
        if (!*offset)
                return NULL;
        return (void *)offset + *offset;
}

extern bool dynamic_scs_is_enabled;

extern pgd_t init_idmap_pg_dir[], init_idmap_pg_end[];
extern pgd_t init_pg_dir[], init_pg_end[];

void init_feature_override(u64 boot_status, const void *fdt, int chosen);
u64 kaslr_early_init(void *fdt, int chosen);
void relocate_kernel(u64 offset);
int scs_patch(const u8 eh_frame[], int size, bool skip_dry_run);

void map_range(phys_addr_t *pte, u64 start, u64 end, phys_addr_t pa,
               pgprot_t prot, int level, pte_t *tbl, bool may_use_cont,
               u64 va_offset);

asmlinkage void early_map_kernel(u64 boot_status, phys_addr_t fdt);

asmlinkage phys_addr_t create_init_idmap(pgd_t *pgd, ptdesc_t clrmask);