1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2021 Sifive.
4  */
5 
6 #ifndef __ASM_ALTERNATIVE_H
7 #define __ASM_ALTERNATIVE_H
8 
9 #define ERRATA_STRING_LENGTH_MAX 32
10 
11 #include <asm/alternative-macros.h>
12 
13 #ifndef __ASSEMBLY__
14 
15 #include <linux/init.h>
16 #include <linux/types.h>
17 #include <linux/stddef.h>
18 #include <asm/hwcap.h>
19 
20 void __init apply_boot_alternatives(void);
21 
22 struct alt_entry {
23 	void *old_ptr;		 /* address of original instruciton or data  */
24 	void *alt_ptr;		 /* address of replacement instruction or data */
25 	unsigned long vendor_id; /* cpu vendor id */
26 	unsigned long alt_len;   /* The replacement size */
27 	unsigned int errata_id;  /* The errata id */
28 } __packed;
29 
30 struct errata_checkfunc_id {
31 	unsigned long vendor_id;
32 	bool (*func)(struct alt_entry *alt);
33 };
34 
35 void sifive_errata_patch_func(struct alt_entry *begin, struct alt_entry *end,
36 			      unsigned long archid, unsigned long impid);
37 
38 #endif
39 #endif
40