1 /*
2  * Copyright (c) 2017-2022, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #ifndef SPM_COMMON_H
8 #define SPM_COMMON_H
9 
10 #include <context.h>
11 
12 /*******************************************************************************
13  * Constants that allow assembler code to preserve callee-saved registers of the
14  * C runtime context while performing a security state switch.
15  ******************************************************************************/
16 #define SP_C_RT_CTX_X19		0x0
17 #define SP_C_RT_CTX_X20		0x8
18 #define SP_C_RT_CTX_X21		0x10
19 #define SP_C_RT_CTX_X22		0x18
20 #define SP_C_RT_CTX_X23		0x20
21 #define SP_C_RT_CTX_X24		0x28
22 #define SP_C_RT_CTX_X25		0x30
23 #define SP_C_RT_CTX_X26		0x38
24 #define SP_C_RT_CTX_X27		0x40
25 #define SP_C_RT_CTX_X28		0x48
26 #define SP_C_RT_CTX_X29		0x50
27 #define SP_C_RT_CTX_X30		0x58
28 
29 #define SP_C_RT_CTX_SIZE	0x60
30 #define SP_C_RT_CTX_ENTRIES	(SP_C_RT_CTX_SIZE >> DWORD_SHIFT)
31 
32 #ifndef __ASSEMBLER__
33 
34 #include <stdint.h>
35 
36 /* Assembly helpers */
37 uint64_t spm_secure_partition_enter(uint64_t *c_rt_ctx);
38 void __dead2 spm_secure_partition_exit(uint64_t c_rt_ctx, uint64_t ret);
39 
40 #endif /* __ASSEMBLER__ */
41 
42 #endif /* SPM_COMMON_H */
43