1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2016, Linaro Limited 4 * Copyright (c) 2014, STMicroelectronics International N.V. 5 */ 6 7 #ifndef SM_SM_H 8 #define SM_SM_H 9 10 #include <compiler.h> 11 #include <types_ext.h> 12 13 struct sm_mode_regs { 14 uint32_t usr_sp; 15 uint32_t usr_lr; 16 uint32_t irq_spsr; 17 uint32_t irq_sp; 18 uint32_t irq_lr; 19 uint32_t fiq_spsr; 20 uint32_t fiq_sp; 21 uint32_t fiq_lr; 22 /* 23 * Note that fiq_r{8-12} are not saved here. Instead thread_fiq_handler 24 * preserves r{8-12}. 25 */ 26 uint32_t svc_spsr; 27 uint32_t svc_sp; 28 uint32_t svc_lr; 29 uint32_t abt_spsr; 30 uint32_t abt_sp; 31 uint32_t abt_lr; 32 uint32_t und_spsr; 33 uint32_t und_sp; 34 uint32_t und_lr; 35 }; 36 37 struct sm_nsec_ctx { 38 struct sm_mode_regs mode_regs; 39 40 uint32_t r8; 41 uint32_t r9; 42 uint32_t r10; 43 uint32_t r11; 44 uint32_t r12; 45 46 uint32_t r0; 47 uint32_t r1; 48 uint32_t r2; 49 uint32_t r3; 50 uint32_t r4; 51 uint32_t r5; 52 uint32_t r6; 53 uint32_t r7; 54 55 /* return state */ 56 uint32_t mon_lr; 57 uint32_t mon_spsr; 58 }; 59 60 struct sm_sec_ctx { 61 struct sm_mode_regs mode_regs; 62 63 uint32_t r0; 64 uint32_t r1; 65 uint32_t r2; 66 uint32_t r3; 67 uint32_t r4; 68 uint32_t r5; 69 uint32_t r6; 70 uint32_t r7; 71 72 /* return state */ 73 uint32_t mon_lr; 74 uint32_t mon_spsr; 75 }; 76 77 struct sm_ctx { 78 uint32_t pad; 79 struct sm_sec_ctx sec; 80 struct sm_nsec_ctx nsec; 81 }; 82 83 /* 84 * The secure monitor reserves space at top of stack_tmp to hold struct 85 * sm_ctx. 86 */ 87 #define SM_STACK_TMP_RESERVE_SIZE sizeof(struct sm_ctx) 88 89 90 91 /* Returns storage location of non-secure context for current CPU */ 92 struct sm_nsec_ctx *sm_get_nsec_ctx(void); 93 94 /* Returns stack pointer to use in monitor mode for current CPU */ 95 void *sm_get_sp(void); 96 97 /* 98 * Initializes secure monitor, must be called by each CPU 99 */ 100 void sm_init(vaddr_t stack_pointer); 101 102 #ifndef CFG_SM_PLATFORM_HANDLER 103 /* 104 * Returns false if we handled the monitor service and should now return 105 * back to the non-secure state 106 */ 107 static inline bool sm_platform_handler(__unused struct sm_ctx *ctx) 108 { 109 return true; 110 } 111 #else 112 bool sm_platform_handler(struct sm_ctx *ctx); 113 #endif 114 115 void sm_save_modes_regs(struct sm_mode_regs *regs); 116 void sm_restore_modes_regs(struct sm_mode_regs *regs); 117 #endif /*SM_SM_H*/ 118