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_MM_PRIVATE_H
8 #define SPM_MM_PRIVATE_H
9 
10 #include <context.h>
11 #include "spm_common.h"
12 
13 /*******************************************************************************
14  * Constants that allow assembler code to preserve callee-saved registers of the
15  * C runtime context while performing a security state switch.
16  ******************************************************************************/
17 #define SP_C_RT_CTX_X19		0x0
18 #define SP_C_RT_CTX_X20		0x8
19 #define SP_C_RT_CTX_X21		0x10
20 #define SP_C_RT_CTX_X22		0x18
21 #define SP_C_RT_CTX_X23		0x20
22 #define SP_C_RT_CTX_X24		0x28
23 #define SP_C_RT_CTX_X25		0x30
24 #define SP_C_RT_CTX_X26		0x38
25 #define SP_C_RT_CTX_X27		0x40
26 #define SP_C_RT_CTX_X28		0x48
27 #define SP_C_RT_CTX_X29		0x50
28 #define SP_C_RT_CTX_X30		0x58
29 
30 #define SP_C_RT_CTX_SIZE	0x60
31 #define SP_C_RT_CTX_ENTRIES	(SP_C_RT_CTX_SIZE >> DWORD_SHIFT)
32 
33 #ifndef __ASSEMBLER__
34 
35 #include <stdint.h>
36 
37 #include <lib/spinlock.h>
38 #include <lib/xlat_tables/xlat_tables_v2.h>
39 
40 typedef enum sp_state {
41 	SP_STATE_RESET = 0,
42 	SP_STATE_IDLE,
43 	SP_STATE_BUSY
44 } sp_state_t;
45 
46 typedef struct sp_context {
47 	uint64_t c_rt_ctx;
48 	cpu_context_t cpu_ctx;
49 	xlat_ctx_t *xlat_ctx_handle;
50 
51 	sp_state_t state;
52 	spinlock_t state_lock;
53 } sp_context_t;
54 
55 
56 void spm_sp_setup(sp_context_t *sp_ctx);
57 
58 xlat_ctx_t *spm_get_sp_xlat_context(void);
59 
60 int32_t spm_memory_attributes_get_smc_handler(sp_context_t *sp_ctx,
61 					      uintptr_t base_va);
62 int spm_memory_attributes_set_smc_handler(sp_context_t *sp_ctx,
63 					  u_register_t page_address,
64 					  u_register_t pages_count,
65 					  u_register_t smc_attributes);
66 
67 #endif /* __ASSEMBLER__ */
68 
69 #endif /* SPM_MM_PRIVATE_H */
70