1 /*
2  * Copyright (c) 2017-2019, 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 
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 #include <lib/spinlock.h>
37 #include <lib/xlat_tables/xlat_tables_v2.h>
38 
39 typedef enum sp_state {
40 	SP_STATE_RESET = 0,
41 	SP_STATE_IDLE,
42 	SP_STATE_BUSY
43 } sp_state_t;
44 
45 typedef struct sp_context {
46 	uint64_t c_rt_ctx;
47 	cpu_context_t cpu_ctx;
48 	xlat_ctx_t *xlat_ctx_handle;
49 
50 	sp_state_t state;
51 	spinlock_t state_lock;
52 } sp_context_t;
53 
54 /* Assembly helpers */
55 uint64_t spm_secure_partition_enter(uint64_t *c_rt_ctx);
56 void __dead2 spm_secure_partition_exit(uint64_t c_rt_ctx, uint64_t ret);
57 
58 void spm_sp_setup(sp_context_t *sp_ctx);
59 
60 xlat_ctx_t *spm_get_sp_xlat_context(void);
61 
62 int32_t spm_memory_attributes_get_smc_handler(sp_context_t *sp_ctx,
63 					      uintptr_t base_va);
64 int spm_memory_attributes_set_smc_handler(sp_context_t *sp_ctx,
65 					  u_register_t page_address,
66 					  u_register_t pages_count,
67 					  u_register_t smc_attributes);
68 
69 #endif /* __ASSEMBLER__ */
70 
71 #endif /* SPM_MM_PRIVATE_H */
72