1 /*
2 * Copyright (c) 2021-2024, Arm Limited. All rights reserved.
3 * Copyright (c) 2023 Cypress Semiconductor Corporation (an Infineon
4 * company) or an affiliate of Cypress Semiconductor Corporation. All rights
5 * reserved.
6 *
7 * SPDX-License-Identifier: BSD-3-Clause
8 *
9 */
10 #include <stdint.h>
11
12 #include "compiler_ext_defs.h"
13 #include "security_defs.h"
14 #include "tfm_arch.h"
15 #include "tfm_hal_platform.h"
16
ns_agent_tz_main(uint32_t c_entry)17 __naked void ns_agent_tz_main(uint32_t c_entry)
18 {
19 __ASM volatile(
20 SYNTAX_UNIFIED
21 " ldr r2, [sp] \n"
22 " ldr r3, ="M2S(STACK_SEAL_PATTERN)" \n" /* SEAL double-check */
23 " cmp r2, r3 \n"
24 " bne ns_agent_nspe_jump_panic \n"
25 #if (CONFIG_TFM_FLOAT_ABI > 0)
26 /* IAR throws an error if the S0-S31 syntax is used.
27 * Splitting the command into two parts solved the issue.
28 */
29 #if defined(__ICCARM__)
30 " vscclrm {S0-S30, VPR} \n"
31 " vscclrm {S31, VPR} \n"
32 #else
33 " vscclrm {S0-S31, VPR} \n"
34 #endif
35 " mov r1, #0 \n"
36 " vmsr fpscr_nzcvqc, r1 \n"
37 " mrs r1, control \n"
38 " bic r1, r1, #4 \n"
39 " msr control, r1 \n"
40 " isb \n"
41 #endif
42 " clrm {r1-r12, r14, apsr} \n"
43 " bic r0, r0, #1 \n"
44 " bxns r0 \n"
45 "ns_agent_nspe_jump_panic: \n"
46 " b . \n"
47 );
48 }
49
