Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 1 | /* |
Kevin Peng | a40d29f | 2022-01-19 14:44:34 +0800 | [diff] [blame] | 2 | * Copyright (c) 2021-2022, Arm Limited. All rights reserved. |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include "interrupt.h" |
| 9 | |
| 10 | #include "bitops.h" |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 11 | #include "current.h" |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 12 | #include "tfm_arch.h" |
| 13 | #include "tfm_hal_interrupt.h" |
| 14 | #include "tfm_hal_isolation.h" |
| 15 | #include "thread.h" |
| 16 | #include "utilities.h" |
| 17 | |
| 18 | #include "load/spm_load_api.h" |
| 19 | |
Sherry Zhang | d6dbe51 | 2022-03-23 16:42:32 +0800 | [diff] [blame] | 20 | #if TFM_LVL != 1 |
| 21 | extern void tfm_flih_func_return(psa_flih_result_t result); |
| 22 | |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 23 | __attribute__((naked)) |
| 24 | static psa_flih_result_t tfm_flih_deprivileged_handling(void *p_pt, |
| 25 | uintptr_t fn_flih, |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 26 | void *curr_component) |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 27 | { |
Sherry Zhang | 9714d96 | 2022-03-02 10:52:46 +0800 | [diff] [blame] | 28 | __ASM volatile("SVC "M2S(TFM_SVC_PREPARE_DEPRIV_FLIH)" \n" |
| 29 | "BX LR \n" |
| 30 | ); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 31 | } |
| 32 | |
Kevin Peng | f7a20d8 | 2021-12-13 14:38:37 +0800 | [diff] [blame] | 33 | uint32_t tfm_flih_prepare_depriv_flih(struct partition_t *p_owner_sp, |
| 34 | uintptr_t flih_func) |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 35 | { |
| 36 | struct partition_t *p_curr_sp; |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 37 | uintptr_t sp_base, sp_limit, curr_stack, ctx_stack; |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 38 | struct context_ctrl_t flih_ctx_ctrl; |
| 39 | |
| 40 | /* Come too early before runtime setup, should not happen. */ |
| 41 | if (!CURRENT_THREAD) { |
| 42 | tfm_core_panic(); |
| 43 | } |
| 44 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 45 | p_curr_sp = GET_CURRENT_COMPONENT(); |
| 46 | sp_base = LOAD_ALLOCED_STACK_ADDR(p_owner_sp->p_ldinf) |
| 47 | + p_owner_sp->p_ldinf->stack_size; |
| 48 | sp_limit = LOAD_ALLOCED_STACK_ADDR(p_owner_sp->p_ldinf); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 49 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 50 | curr_stack = (uintptr_t)__get_PSP(); |
| 51 | if (curr_stack < sp_base && curr_stack > sp_limit) { |
| 52 | /* The IRQ Partition's stack is being used */ |
| 53 | ctx_stack = curr_stack; |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 54 | } else { |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 55 | ctx_stack = |
| 56 | ((struct context_ctrl_t *)p_owner_sp->thrd.p_context_ctrl)->sp; |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 57 | } |
| 58 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 59 | if (p_owner_sp->p_boundaries != p_curr_sp->p_boundaries) { |
| 60 | tfm_hal_update_boundaries(p_owner_sp->p_ldinf, |
| 61 | p_owner_sp->p_boundaries); |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * The CURRENT_COMPONENT has been stored on MSP by the SVC call, safe to |
| 66 | * update it. |
| 67 | */ |
| 68 | SET_CURRENT_COMPONENT(p_owner_sp); |
| 69 | |
Ken Liu | bf4681f | 2022-02-11 11:15:03 +0800 | [diff] [blame] | 70 | flih_ctx_ctrl.sp_limit = sp_limit; |
| 71 | flih_ctx_ctrl.sp = ctx_stack; |
| 72 | |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 73 | tfm_arch_init_context(&flih_ctx_ctrl, |
Kevin Peng | f7a20d8 | 2021-12-13 14:38:37 +0800 | [diff] [blame] | 74 | flih_func, NULL, |
Ken Liu | bf4681f | 2022-02-11 11:15:03 +0800 | [diff] [blame] | 75 | (uintptr_t)tfm_flih_func_return); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 76 | |
| 77 | (void)tfm_arch_refresh_hardware_context(&flih_ctx_ctrl); |
| 78 | |
| 79 | return flih_ctx_ctrl.exc_ret; |
| 80 | } |
| 81 | |
| 82 | /* Go back to ISR from FLIH functions */ |
Kevin Peng | f7a20d8 | 2021-12-13 14:38:37 +0800 | [diff] [blame] | 83 | uint32_t tfm_flih_return_to_isr(psa_flih_result_t result, |
| 84 | struct context_flih_ret_t *p_ctx_flih_ret) |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 85 | { |
| 86 | struct partition_t *p_prev_sp, *p_owner_sp; |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 87 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 88 | p_prev_sp = (struct partition_t *)(p_ctx_flih_ret->state_ctx.r2); |
| 89 | p_owner_sp = GET_CURRENT_COMPONENT(); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 90 | |
| 91 | if (p_owner_sp->p_boundaries != p_prev_sp->p_boundaries) { |
| 92 | tfm_hal_update_boundaries(p_prev_sp->p_ldinf, |
| 93 | p_prev_sp->p_boundaries); |
| 94 | } |
| 95 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 96 | /* Restore current component */ |
| 97 | SET_CURRENT_COMPONENT(p_prev_sp); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 98 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 99 | tfm_arch_set_psplim(p_ctx_flih_ret->psplim); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 100 | __set_PSP(p_ctx_flih_ret->psp); |
| 101 | |
| 102 | /* Set FLIH result to the ISR */ |
| 103 | p_ctx_flih_ret->state_ctx.r0 = (uint32_t)result; |
| 104 | |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 105 | return EXC_RETURN_HANDLER_S_MSP; |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 106 | } |
Sherry Zhang | d6dbe51 | 2022-03-23 16:42:32 +0800 | [diff] [blame] | 107 | #endif |
| 108 | |
| 109 | struct irq_load_info_t *get_irq_info_for_signal( |
| 110 | const struct partition_load_info_t *p_ldinf, |
| 111 | psa_signal_t signal) |
| 112 | { |
| 113 | size_t i; |
| 114 | struct irq_load_info_t *irq_info; |
| 115 | |
| 116 | if (!IS_ONLY_ONE_BIT_IN_UINT32(signal)) { |
| 117 | return NULL; |
| 118 | } |
| 119 | |
| 120 | irq_info = (struct irq_load_info_t *)LOAD_INFO_IRQ(p_ldinf); |
| 121 | for (i = 0; i < p_ldinf->nirqs; i++) { |
| 122 | if (irq_info[i].signal == signal) { |
| 123 | return &irq_info[i]; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | return NULL; |
| 128 | } |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 129 | |
| 130 | void spm_handle_interrupt(void *p_pt, struct irq_load_info_t *p_ildi) |
| 131 | { |
| 132 | psa_flih_result_t flih_result; |
| 133 | struct partition_t *p_part; |
| 134 | |
| 135 | if (!p_pt || !p_ildi) { |
| 136 | tfm_core_panic(); |
| 137 | } |
| 138 | |
| 139 | p_part = (struct partition_t *)p_pt; |
| 140 | |
| 141 | if (p_ildi->pid != p_part->p_ldinf->pid) { |
| 142 | tfm_core_panic(); |
| 143 | } |
| 144 | |
| 145 | if (p_ildi->flih_func == NULL) { |
| 146 | /* SLIH Model Handling */ |
| 147 | tfm_hal_irq_disable(p_ildi->source); |
| 148 | flih_result = PSA_FLIH_SIGNAL; |
| 149 | } else { |
| 150 | /* FLIH Model Handling */ |
Sherry Zhang | d6dbe51 | 2022-03-23 16:42:32 +0800 | [diff] [blame] | 151 | #if TFM_LVL == 1 |
| 152 | flih_result = p_ildi->flih_func(); |
| 153 | #else |
Kevin Peng | a40d29f | 2022-01-19 14:44:34 +0800 | [diff] [blame] | 154 | if (GET_PARTITION_PRIVILEGED_MODE(p_part->p_ldinf) == |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 155 | TFM_PARTITION_PRIVILEGED_MODE) { |
| 156 | flih_result = p_ildi->flih_func(); |
| 157 | } else { |
| 158 | flih_result = tfm_flih_deprivileged_handling( |
| 159 | p_part, |
| 160 | (uintptr_t)p_ildi->flih_func, |
Kevin Peng | ca59ec0 | 2021-12-09 14:35:50 +0800 | [diff] [blame] | 161 | GET_CURRENT_COMPONENT()); |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 162 | } |
Sherry Zhang | d6dbe51 | 2022-03-23 16:42:32 +0800 | [diff] [blame] | 163 | #endif |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | if (flih_result == PSA_FLIH_SIGNAL) { |
| 167 | spm_assert_signal(p_pt, p_ildi->signal); |
Sherry Zhang | 049733e | 2022-04-20 21:37:51 +0800 | [diff] [blame^] | 168 | /* In SFN backend, there is only one thread, no thread switch. */ |
| 169 | #if CONFIG_TFM_SPM_BACKEND_SFN != 1 |
Kevin Peng | 8a57969 | 2021-12-15 13:44:42 +0800 | [diff] [blame] | 170 | if (THRD_EXPECTING_SCHEDULE()) { |
| 171 | tfm_arch_trigger_pendsv(); |
| 172 | } |
Sherry Zhang | 049733e | 2022-04-20 21:37:51 +0800 | [diff] [blame^] | 173 | #endif |
Kevin Peng | 3f67b2e | 2021-10-18 17:47:27 +0800 | [diff] [blame] | 174 | } |
| 175 | } |