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tfm_arch_v8m.h
1 /*
2  * Copyright (c) 2018-2019, Arm Limited. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  *
6  */
7 #ifndef __TFM_ARCH_V8M_H__
8 #define __TFM_ARCH_V8M_H__
9 
10 #include "cmsis.h"
11 
12 #define XPSR_T32 0x01000000
13 #define LR_UNPRIVILEGED 0xfffffffd
14 
15 /* This header file collects the ARCH related operations. */
16 struct tfm_state_context_base {
17  uint32_t r0;
18  uint32_t r1;
19  uint32_t r2;
20  uint32_t r3;
21  uint32_t r12;
22  uint32_t ra_lr;
23  uint32_t ra;
24  uint32_t xpsr;
25 };
26 
27 struct tfm_state_context_ext {
28  uint32_t r4;
29  uint32_t r5;
30  uint32_t r6;
31  uint32_t r7;
32  uint32_t r8;
33  uint32_t r9;
34  uint32_t r10;
35  uint32_t r11;
36  uint32_t sp;
37  uint32_t sp_limit;
38  uint32_t dummy;
39  uint32_t lr;
40 };
41 
42 struct tfm_state_context {
43  struct tfm_state_context_ext ctxb;
44 };
45 
46 #define TFM_STATE_1ST_ARG(ctx) \
47  (((struct tfm_state_context_base *)(ctx)->ctxb.sp)->r0)
48 #define TFM_STATE_2ND_ARG(ctx) \
49  (((struct tfm_state_context_base *)(ctx)->ctxb.sp)->r1)
50 #define TFM_STATE_3RD_ARG(ctx) \
51  (((struct tfm_state_context_base *)(ctx)->ctxb.sp)->r2)
52 #define TFM_STATE_4TH_ARG(ctx) \
53  (((struct tfm_state_context_base *)(ctx)->ctxb.sp)->r3)
54 #define TFM_STATE_RET_VAL(ctx) \
55  (((struct tfm_state_context_base *)(ctx)->ctxb.sp)->r0)
56 
57 __STATIC_INLINE void tfm_trigger_pendsv(void)
58 {
59  SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
60 }
61 
62 void tfm_initialize_context(struct tfm_state_context *ctx,
63  uint32_t r0, uint32_t ra,
64  uint32_t sp, uint32_t sp_limit);
65 
66 #endif
tfm_state_context_base
Definition: tfm_arch_v8m.h:16
tfm_state_context_ext
Definition: tfm_arch_v8m.h:27
tfm_state_context
Definition: tfm_arch_v8m.h:42
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