diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
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committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /security/tf_driver/tf_comm.h | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'security/tf_driver/tf_comm.h')
-rw-r--r-- | security/tf_driver/tf_comm.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/security/tf_driver/tf_comm.h b/security/tf_driver/tf_comm.h new file mode 100644 index 00000000000..8921dc1d1be --- /dev/null +++ b/security/tf_driver/tf_comm.h | |||
@@ -0,0 +1,202 @@ | |||
1 | /** | ||
2 | * Copyright (c) 2011 Trusted Logic S.A. | ||
3 | * All Rights Reserved. | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or | ||
6 | * modify it under the terms of the GNU General Public License | ||
7 | * version 2 as published by the Free Software Foundation. | ||
8 | * | ||
9 | * This program is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | * GNU General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU General Public License | ||
15 | * along with this program; if not, write to the Free Software | ||
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | ||
17 | * MA 02111-1307 USA | ||
18 | */ | ||
19 | |||
20 | #ifndef __TF_COMM_H__ | ||
21 | #define __TF_COMM_H__ | ||
22 | |||
23 | #include "tf_defs.h" | ||
24 | #include "tf_protocol.h" | ||
25 | |||
26 | /*---------------------------------------------------------------------------- | ||
27 | * Misc | ||
28 | *----------------------------------------------------------------------------*/ | ||
29 | |||
30 | void tf_set_current_time(struct tf_comm *comm); | ||
31 | |||
32 | /* | ||
33 | * Atomic accesses to 32-bit variables in the L1 Shared buffer | ||
34 | */ | ||
35 | static inline u32 tf_read_reg32(const u32 *comm_buffer) | ||
36 | { | ||
37 | u32 result; | ||
38 | |||
39 | __asm__ __volatile__("@ tf_read_reg32\n" | ||
40 | "ldrex %0, [%1]\n" | ||
41 | : "=&r" (result) | ||
42 | : "r" (comm_buffer) | ||
43 | ); | ||
44 | |||
45 | return result; | ||
46 | } | ||
47 | |||
48 | static inline void tf_write_reg32(void *comm_buffer, u32 value) | ||
49 | { | ||
50 | u32 tmp; | ||
51 | |||
52 | __asm__ __volatile__("@ tf_write_reg32\n" | ||
53 | "1: ldrex %0, [%2]\n" | ||
54 | " strex %0, %1, [%2]\n" | ||
55 | " teq %0, #0\n" | ||
56 | " bne 1b" | ||
57 | : "=&r" (tmp) | ||
58 | : "r" (value), "r" (comm_buffer) | ||
59 | : "cc" | ||
60 | ); | ||
61 | } | ||
62 | |||
63 | /* | ||
64 | * Atomic accesses to 64-bit variables in the L1 Shared buffer | ||
65 | */ | ||
66 | static inline u64 tf_read_reg64(void *comm_buffer) | ||
67 | { | ||
68 | u64 result; | ||
69 | |||
70 | __asm__ __volatile__("@ tf_read_reg64\n" | ||
71 | "ldrexd %0, [%1]\n" | ||
72 | : "=&r" (result) | ||
73 | : "r" (comm_buffer) | ||
74 | ); | ||
75 | |||
76 | return result; | ||
77 | } | ||
78 | |||
79 | static inline void tf_write_reg64(void *comm_buffer, u64 value) | ||
80 | { | ||
81 | u64 tmp; | ||
82 | |||
83 | __asm__ __volatile__("@ tf_write_reg64\n" | ||
84 | "1: ldrexd %0, [%2]\n" | ||
85 | " strexd %0, %1, [%2]\n" | ||
86 | " teq %0, #0\n" | ||
87 | " bne 1b" | ||
88 | : "=&r" (tmp) | ||
89 | : "r" (value), "r" (comm_buffer) | ||
90 | : "cc" | ||
91 | ); | ||
92 | } | ||
93 | |||
94 | /*---------------------------------------------------------------------------- | ||
95 | * SMC operations | ||
96 | *----------------------------------------------------------------------------*/ | ||
97 | |||
98 | /* RPC return values */ | ||
99 | #define RPC_NO 0x00 /* No RPC to execute */ | ||
100 | #define RPC_YIELD 0x01 /* Yield RPC */ | ||
101 | #define RPC_NON_YIELD 0x02 /* non-Yield RPC */ | ||
102 | |||
103 | int tf_rpc_execute(struct tf_comm *comm); | ||
104 | |||
105 | /*---------------------------------------------------------------------------- | ||
106 | * Shared memory related operations | ||
107 | *----------------------------------------------------------------------------*/ | ||
108 | |||
109 | #define L1_DESCRIPTOR_FAULT (0x00000000) | ||
110 | #define L2_DESCRIPTOR_FAULT (0x00000000) | ||
111 | |||
112 | #define L2_DESCRIPTOR_ADDR_MASK (0xFFFFF000) | ||
113 | |||
114 | #define DESCRIPTOR_V13_12_MASK (0x3 << PAGE_SHIFT) | ||
115 | #define DESCRIPTOR_V13_12_GET(a) ((a & DESCRIPTOR_V13_12_MASK) >> PAGE_SHIFT) | ||
116 | |||
117 | struct tf_coarse_page_table *tf_alloc_coarse_page_table( | ||
118 | struct tf_coarse_page_table_allocation_context *alloc_context, | ||
119 | u32 type); | ||
120 | |||
121 | void tf_free_coarse_page_table( | ||
122 | struct tf_coarse_page_table_allocation_context *alloc_context, | ||
123 | struct tf_coarse_page_table *coarse_pg_table, | ||
124 | int force); | ||
125 | |||
126 | void tf_init_coarse_page_table_allocator( | ||
127 | struct tf_coarse_page_table_allocation_context *alloc_context); | ||
128 | |||
129 | void tf_release_coarse_page_table_allocator( | ||
130 | struct tf_coarse_page_table_allocation_context *alloc_context); | ||
131 | |||
132 | struct page *tf_l2_page_descriptor_to_page(u32 l2_page_descriptor); | ||
133 | |||
134 | u32 tf_get_l2_descriptor_common(u32 vaddr, struct mm_struct *mm); | ||
135 | |||
136 | void tf_cleanup_shared_memory( | ||
137 | struct tf_coarse_page_table_allocation_context *alloc_context, | ||
138 | struct tf_shmem_desc *shmem_desc, | ||
139 | u32 full_cleanup); | ||
140 | |||
141 | int tf_fill_descriptor_table( | ||
142 | struct tf_coarse_page_table_allocation_context *alloc_context, | ||
143 | struct tf_shmem_desc *shmem_desc, | ||
144 | u32 buffer, | ||
145 | struct vm_area_struct **vmas, | ||
146 | u32 descriptors[TF_MAX_COARSE_PAGES], | ||
147 | u32 buffer_size, | ||
148 | u32 *buffer_start_offset, | ||
149 | bool in_user_space, | ||
150 | u32 flags, | ||
151 | u32 *descriptor_count); | ||
152 | |||
153 | /*---------------------------------------------------------------------------- | ||
154 | * Standard communication operations | ||
155 | *----------------------------------------------------------------------------*/ | ||
156 | |||
157 | int tf_schedule_secure_world(struct tf_comm *comm); | ||
158 | |||
159 | int tf_send_receive( | ||
160 | struct tf_comm *comm, | ||
161 | union tf_command *command, | ||
162 | union tf_answer *answer, | ||
163 | struct tf_connection *connection, | ||
164 | bool bKillable); | ||
165 | |||
166 | |||
167 | /** | ||
168 | * get a pointer to the secure world description. | ||
169 | * This points directly into the L1 shared buffer | ||
170 | * and is valid only once the communication has | ||
171 | * been initialized | ||
172 | **/ | ||
173 | u8 *tf_get_description(struct tf_comm *comm); | ||
174 | |||
175 | /*---------------------------------------------------------------------------- | ||
176 | * Power management | ||
177 | *----------------------------------------------------------------------------*/ | ||
178 | |||
179 | enum TF_POWER_OPERATION { | ||
180 | TF_POWER_OPERATION_HIBERNATE = 1, | ||
181 | TF_POWER_OPERATION_SHUTDOWN = 2, | ||
182 | TF_POWER_OPERATION_RESUME = 3, | ||
183 | }; | ||
184 | |||
185 | int tf_pm_hibernate(struct tf_comm *comm); | ||
186 | int tf_pm_resume(struct tf_comm *comm); | ||
187 | int tf_pm_shutdown(struct tf_comm *comm); | ||
188 | |||
189 | int tf_power_management(struct tf_comm *comm, | ||
190 | enum TF_POWER_OPERATION operation); | ||
191 | |||
192 | |||
193 | /*---------------------------------------------------------------------------- | ||
194 | * Communication initialization and termination | ||
195 | *----------------------------------------------------------------------------*/ | ||
196 | |||
197 | int tf_init(struct tf_comm *comm); | ||
198 | |||
199 | void tf_terminate(struct tf_comm *comm); | ||
200 | |||
201 | |||
202 | #endif /* __TF_COMM_H__ */ | ||