Sandrine Bailleux | 3cd87d7 | 2018-10-09 11:12:55 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch_helpers.h> |
Sandrine Bailleux | 3cd87d7 | 2018-10-09 11:12:55 +0200 | [diff] [blame] | 8 | #include <debug.h> |
Antonio Nino Diaz | 09a00ef | 2019-01-11 13:12:58 +0000 | [diff] [blame] | 9 | #include <drivers/arm/arm_gic.h> |
Sandrine Bailleux | 3cd87d7 | 2018-10-09 11:12:55 +0200 | [diff] [blame] | 10 | #include <irq.h> |
| 11 | #include <platform.h> |
| 12 | #include <power_management.h> |
| 13 | #include <psci.h> |
| 14 | #include <sgi.h> |
| 15 | #include <tftf.h> |
| 16 | #include <tftf_lib.h> |
| 17 | |
| 18 | static unsigned int pstate_format_detected; |
| 19 | static unsigned int pstate_format; |
| 20 | static unsigned int is_state_id_null; |
| 21 | |
| 22 | const psci_function_t psci_functions[PSCI_NUM_CALLS] = { |
| 23 | DEFINE_PSCI_FUNC(PSCI_FEATURES, true), |
| 24 | DEFINE_PSCI_FUNC(PSCI_VERSION, true), |
| 25 | DEFINE_PSCI_FUNC(PSCI_CPU_SUSPEND_AARCH32, true), |
| 26 | DEFINE_PSCI_FUNC(PSCI_CPU_SUSPEND_AARCH64, true), |
| 27 | DEFINE_PSCI_FUNC(PSCI_CPU_OFF, true), |
| 28 | DEFINE_PSCI_FUNC(PSCI_CPU_ON_AARCH32, true), |
| 29 | DEFINE_PSCI_FUNC(PSCI_CPU_ON_AARCH64, true), |
| 30 | DEFINE_PSCI_FUNC(PSCI_AFFINITY_INFO_AARCH32, true), |
| 31 | DEFINE_PSCI_FUNC(PSCI_AFFINITY_INFO_AARCH64, true), |
| 32 | DEFINE_PSCI_FUNC(PSCI_SYSTEM_OFF, true), |
| 33 | DEFINE_PSCI_FUNC(PSCI_SYSTEM_RESET, true), |
| 34 | DEFINE_PSCI_FUNC(PSCI_MIG_INFO_TYPE, false), |
| 35 | DEFINE_PSCI_FUNC(PSCI_MIG_INFO_UP_CPU_AARCH32, false), |
| 36 | DEFINE_PSCI_FUNC(PSCI_MIG_INFO_UP_CPU_AARCH64, false), |
| 37 | DEFINE_PSCI_FUNC(PSCI_MIG_AARCH32, false), |
| 38 | DEFINE_PSCI_FUNC(PSCI_MIG_AARCH64, false), |
| 39 | DEFINE_PSCI_FUNC(PSCI_CPU_FREEZE, false), |
| 40 | DEFINE_PSCI_FUNC(PSCI_CPU_DEFAULT_SUSPEND32, false), |
| 41 | DEFINE_PSCI_FUNC(PSCI_CPU_DEFAULT_SUSPEND64, false), |
| 42 | DEFINE_PSCI_FUNC(PSCI_CPU_HW_STATE32, false), |
| 43 | DEFINE_PSCI_FUNC(PSCI_CPU_HW_STATE64, false), |
| 44 | DEFINE_PSCI_FUNC(PSCI_SYSTEM_SUSPEND32, false), |
| 45 | DEFINE_PSCI_FUNC(PSCI_SYSTEM_SUSPEND64, false), |
| 46 | DEFINE_PSCI_FUNC(PSCI_SET_SUSPEND_MODE, false), |
| 47 | DEFINE_PSCI_FUNC(PSCI_STAT_RESIDENCY32, false), |
| 48 | DEFINE_PSCI_FUNC(PSCI_STAT_RESIDENCY64, false), |
| 49 | DEFINE_PSCI_FUNC(PSCI_STAT_COUNT32, false), |
| 50 | DEFINE_PSCI_FUNC(PSCI_STAT_COUNT64, false), |
| 51 | DEFINE_PSCI_FUNC(PSCI_MEM_PROTECT, false), |
| 52 | DEFINE_PSCI_FUNC(PSCI_MEM_PROTECT_CHECK_RANGE32, false), |
| 53 | DEFINE_PSCI_FUNC(PSCI_MEM_PROTECT_CHECK_RANGE64, false), |
| 54 | DEFINE_PSCI_FUNC(PSCI_RESET2_AARCH32, false), |
| 55 | DEFINE_PSCI_FUNC(PSCI_RESET2_AARCH64, false), |
| 56 | }; |
| 57 | |
| 58 | int32_t tftf_psci_cpu_on(u_register_t target_cpu, |
| 59 | uintptr_t entry_point_address, |
| 60 | u_register_t context_id) |
| 61 | { |
| 62 | smc_args args = { |
| 63 | SMC_PSCI_CPU_ON, |
| 64 | target_cpu, |
| 65 | entry_point_address, |
| 66 | context_id |
| 67 | }; |
| 68 | smc_ret_values ret_vals; |
| 69 | |
| 70 | ret_vals = tftf_smc(&args); |
| 71 | |
| 72 | return ret_vals.ret0; |
| 73 | } |
| 74 | |
| 75 | int32_t tftf_psci_cpu_off(void) |
| 76 | { |
| 77 | smc_args args = { SMC_PSCI_CPU_OFF }; |
| 78 | smc_ret_values ret_vals; |
| 79 | |
| 80 | ret_vals = tftf_smc(&args); |
| 81 | return ret_vals.ret0; |
| 82 | } |
| 83 | |
Wing Li | cb88add | 2022-10-29 02:32:06 +0100 | [diff] [blame^] | 84 | int32_t tftf_psci_set_suspend_mode(uint32_t mode) |
| 85 | { |
| 86 | smc_args args = { |
| 87 | SMC_PSCI_SET_SUSPEND_MODE, |
| 88 | mode |
| 89 | }; |
| 90 | smc_ret_values ret_vals; |
| 91 | |
| 92 | ret_vals = tftf_smc(&args); |
| 93 | return ret_vals.ret0; |
| 94 | } |
Sandrine Bailleux | 3cd87d7 | 2018-10-09 11:12:55 +0200 | [diff] [blame] | 95 | |
| 96 | u_register_t tftf_psci_stat_residency(u_register_t target_cpu, |
| 97 | uint32_t power_state) |
| 98 | { |
| 99 | smc_args args = { |
| 100 | SMC_PSCI_STAT_RESIDENCY, |
| 101 | target_cpu, |
| 102 | power_state, |
| 103 | }; |
| 104 | smc_ret_values ret_vals; |
| 105 | |
| 106 | ret_vals = tftf_smc(&args); |
| 107 | return ret_vals.ret0; |
| 108 | } |
| 109 | |
| 110 | u_register_t tftf_psci_stat_count(u_register_t target_cpu, |
| 111 | uint32_t power_state) |
| 112 | { |
| 113 | smc_args args = { |
| 114 | SMC_PSCI_STAT_COUNT, |
| 115 | target_cpu, |
| 116 | power_state, |
| 117 | }; |
| 118 | smc_ret_values ret_vals; |
| 119 | |
| 120 | ret_vals = tftf_smc(&args); |
| 121 | return ret_vals.ret0; |
| 122 | } |
| 123 | |
| 124 | int32_t tftf_psci_affinity_info(u_register_t target_affinity, |
| 125 | uint32_t lowest_affinity_level) |
| 126 | { |
| 127 | smc_ret_values ret_vals; |
| 128 | |
| 129 | smc_args args = { |
| 130 | SMC_PSCI_AFFINITY_INFO, |
| 131 | target_affinity, |
| 132 | lowest_affinity_level |
| 133 | }; |
| 134 | |
| 135 | ret_vals = tftf_smc(&args); |
| 136 | return ret_vals.ret0; |
| 137 | } |
| 138 | |
| 139 | int32_t tftf_psci_node_hw_state(u_register_t target_cpu, uint32_t power_level) |
| 140 | { |
| 141 | smc_args args = { |
| 142 | SMC_PSCI_CPU_HW_STATE, |
| 143 | target_cpu, |
| 144 | power_level |
| 145 | }; |
| 146 | smc_ret_values ret; |
| 147 | |
| 148 | ret = tftf_smc(&args); |
| 149 | return ret.ret0; |
| 150 | } |
| 151 | |
| 152 | int32_t tftf_get_psci_feature_info(uint32_t psci_func_id) |
| 153 | { |
| 154 | smc_args args = { |
| 155 | SMC_PSCI_FEATURES, |
| 156 | psci_func_id |
| 157 | }; |
| 158 | smc_ret_values ret; |
| 159 | |
| 160 | ret = tftf_smc(&args); |
| 161 | return ret.ret0; |
| 162 | } |
| 163 | |
| 164 | int tftf_psci_make_composite_state_id(uint32_t affinity_level, |
| 165 | uint32_t state_type, uint32_t *state_id) |
| 166 | { |
| 167 | unsigned int found_entry, i; |
| 168 | int ret = PSCI_E_SUCCESS; |
| 169 | const plat_state_prop_t *state_prop; |
| 170 | |
| 171 | assert(state_id); |
| 172 | |
| 173 | *state_id = 0; |
| 174 | for (i = 0; i <= affinity_level; i++) { |
| 175 | state_prop = plat_get_state_prop(i); |
| 176 | if (!state_prop) { |
| 177 | *state_id |= psci_make_local_state_id(i, |
| 178 | PLAT_PSCI_DUMMY_STATE_ID); |
| 179 | ret = PSCI_E_INVALID_PARAMS; |
| 180 | continue; |
| 181 | } |
| 182 | found_entry = 0; |
| 183 | |
| 184 | while (state_prop->state_ID) { |
| 185 | if (state_type == state_prop->is_pwrdown) { |
| 186 | *state_id |= psci_make_local_state_id(i, |
| 187 | state_prop->state_ID); |
| 188 | found_entry = 1; |
| 189 | break; |
| 190 | } |
| 191 | state_prop++; |
| 192 | } |
| 193 | if (!found_entry) { |
| 194 | *state_id |= psci_make_local_state_id(i, |
| 195 | PLAT_PSCI_DUMMY_STATE_ID); |
| 196 | ret = PSCI_E_INVALID_PARAMS; |
| 197 | } |
| 198 | } |
Wing Li | cb88add | 2022-10-29 02:32:06 +0100 | [diff] [blame^] | 199 | *state_id |= psci_make_local_state_id(PLAT_MAX_PWR_LEVEL + 1, |
| 200 | affinity_level); |
Sandrine Bailleux | 3cd87d7 | 2018-10-09 11:12:55 +0200 | [diff] [blame] | 201 | |
| 202 | return ret; |
| 203 | } |
| 204 | |
| 205 | static unsigned int tftf_psci_get_pstate_format(void) |
| 206 | { |
| 207 | int ret; |
| 208 | |
| 209 | ret = tftf_get_psci_feature_info(SMC_PSCI_CPU_SUSPEND); |
| 210 | |
| 211 | /* |
| 212 | * If error is returned, then it probably means that the PSCI version |
| 213 | * is less than 1.0 and only the original format is supported. In case |
| 214 | * the version is 1.0 or higher, then PSCI FEATURES which is a |
| 215 | * mandatory API is not implemented which implies that only the |
| 216 | * original format is supported. |
| 217 | */ |
| 218 | if (ret == PSCI_E_NOT_SUPPORTED) |
| 219 | return CPU_SUSPEND_FEAT_PSTATE_FORMAT_ORIGINAL; |
| 220 | |
| 221 | /* Treat the invalid return value as PSCI FEATURES not supported */ |
| 222 | if ((ret & ~CPU_SUSPEND_FEAT_VALID_MASK) != 0) |
| 223 | return CPU_SUSPEND_FEAT_PSTATE_FORMAT_ORIGINAL; |
| 224 | |
| 225 | return (ret >> CPU_SUSPEND_FEAT_PSTATE_FORMAT_SHIFT) & 0x1; |
| 226 | } |
| 227 | |
| 228 | /* Make the power state in the original format */ |
| 229 | uint32_t tftf_make_psci_pstate(uint32_t affinity_level, |
| 230 | uint32_t state_type, |
| 231 | uint32_t state_id) |
| 232 | { |
| 233 | uint32_t power_state; |
| 234 | |
| 235 | assert(psci_state_type_valid(state_type)); |
| 236 | |
| 237 | assert(pstate_format_detected); |
| 238 | |
| 239 | if (pstate_format == CPU_SUSPEND_FEAT_PSTATE_FORMAT_EXTENDED) { |
| 240 | assert(psci_state_id_ext_valid(state_id)); |
| 241 | power_state = (state_type << PSTATE_TYPE_SHIFT_EXT) |
| 242 | | (state_id << PSTATE_ID_SHIFT_EXT); |
| 243 | } else { |
| 244 | assert(psci_affinity_level_valid(affinity_level)); |
| 245 | assert(psci_state_id_valid(state_id)); |
| 246 | power_state = (affinity_level << PSTATE_AFF_LVL_SHIFT) |
| 247 | | (state_type << PSTATE_TYPE_SHIFT); |
| 248 | if (!is_state_id_null) |
| 249 | power_state |= (state_id << PSTATE_ID_SHIFT); |
| 250 | } |
| 251 | |
| 252 | return power_state; |
| 253 | } |
| 254 | |
| 255 | |
| 256 | void tftf_detect_psci_pstate_format(void) |
| 257 | { |
| 258 | uint32_t power_state; |
| 259 | unsigned int ret; |
| 260 | |
| 261 | pstate_format = tftf_psci_get_pstate_format(); |
| 262 | |
| 263 | /* |
| 264 | * If the power state format is extended format, then the state-ID |
| 265 | * must use recommended encoding. |
| 266 | */ |
| 267 | if (pstate_format == CPU_SUSPEND_FEAT_PSTATE_FORMAT_EXTENDED) { |
| 268 | pstate_format_detected = 1; |
| 269 | INFO("Extended PSCI power state format detected\n"); |
| 270 | return; |
| 271 | } |
| 272 | |
| 273 | tftf_irq_enable(IRQ_NS_SGI_0, GIC_HIGHEST_NS_PRIORITY); |
| 274 | |
| 275 | /* |
| 276 | * Mask IRQ to prevent the interrupt handler being invoked |
| 277 | * and clearing the interrupt. A pending interrupt will cause this |
| 278 | * CPU to wake-up from suspend. |
| 279 | */ |
| 280 | disable_irq(); |
| 281 | |
| 282 | /* Configure an SGI to wake-up from suspend */ |
| 283 | tftf_send_sgi(IRQ_NS_SGI_0, |
| 284 | platform_get_core_pos(read_mpidr_el1() & MPID_MASK)); |
| 285 | |
| 286 | |
| 287 | /* |
| 288 | * Try to detect if the platform uses NULL State-ID encoding by sending |
| 289 | * PSCI_SUSPEND call with the NULL State-ID encoding. If the call |
| 290 | * succeeds then the platform uses NULL State-ID encoding. Else it |
| 291 | * uses the recommended encoding for State-ID. |
| 292 | */ |
| 293 | power_state = (PSTATE_AFF_LVL_0 << PSTATE_AFF_LVL_SHIFT) |
| 294 | | (PSTATE_TYPE_STANDBY << PSTATE_TYPE_SHIFT); |
| 295 | |
| 296 | ret = tftf_cpu_suspend(power_state); |
| 297 | |
| 298 | /* Unmask the IRQ to let the interrupt handler to execute */ |
| 299 | enable_irq(); |
| 300 | isb(); |
| 301 | |
| 302 | tftf_irq_disable(IRQ_NS_SGI_0); |
| 303 | |
| 304 | /* |
| 305 | * The NULL State-ID returned SUCCESS. Hence State-ID is NULL |
| 306 | * for the power state format. |
| 307 | */ |
| 308 | if (ret == PSCI_E_SUCCESS) { |
| 309 | is_state_id_null = 1; |
| 310 | INFO("Original PSCI power state format with NULL State-ID detected\n"); |
| 311 | } else |
| 312 | INFO("Original PSCI power state format detected\n"); |
| 313 | |
| 314 | |
| 315 | pstate_format_detected = 1; |
| 316 | } |
| 317 | |
| 318 | unsigned int tftf_is_psci_state_id_null(void) |
| 319 | { |
| 320 | assert(pstate_format_detected); |
| 321 | |
| 322 | if (pstate_format == CPU_SUSPEND_FEAT_PSTATE_FORMAT_ORIGINAL) |
| 323 | return is_state_id_null; |
| 324 | else |
| 325 | return 0; /* Extended state ID does not support null format */ |
| 326 | } |
| 327 | |
| 328 | unsigned int tftf_is_psci_pstate_format_original(void) |
| 329 | { |
| 330 | assert(pstate_format_detected); |
| 331 | |
| 332 | return pstate_format == CPU_SUSPEND_FEAT_PSTATE_FORMAT_ORIGINAL; |
| 333 | } |
| 334 | |
| 335 | unsigned int tftf_get_psci_version(void) |
| 336 | { |
| 337 | smc_args args = { SMC_PSCI_VERSION }; |
| 338 | smc_ret_values ret; |
| 339 | |
| 340 | ret = tftf_smc(&args); |
| 341 | |
| 342 | return ret.ret0; |
| 343 | } |
| 344 | |
| 345 | int tftf_is_valid_psci_version(unsigned int version) |
| 346 | { |
| 347 | if (version != PSCI_VERSION(1, 1) && |
| 348 | version != PSCI_VERSION(1, 0) && |
| 349 | version != PSCI_VERSION(0, 2) && |
| 350 | version != PSCI_VERSION(0, 1)) { |
| 351 | return 0; |
| 352 | } |
| 353 | return 1; |
| 354 | } |