1 /* 2 * Copyright (c) 2022, Xilinx, Inc. All rights reserved. 3 * Copyright (c) 2022-2023, Advanced Micro Devices, Inc. All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 #include <assert.h> 9 10 #include <common/debug.h> 11 #include <lib/mmio.h> 12 #include <lib/psci/psci.h> 13 #include <plat/arm/common/plat_arm.h> 14 #include <plat/common/platform.h> 15 #include <plat_arm.h> 16 17 #include <drivers/delay_timer.h> 18 #include <plat_private.h> 19 #include "pm_api_sys.h" 20 #include "pm_client.h" 21 #include <pm_common.h> 22 #include "pm_ipi.h" 23 #include "pm_svc_main.h" 24 #include "versal_net_def.h" 25 26 static uintptr_t versal_net_sec_entry; 27 28 static int32_t versal_net_pwr_domain_on(u_register_t mpidr) 29 { 30 uint32_t cpu_id = plat_core_pos_by_mpidr(mpidr); 31 const struct pm_proc *proc; 32 33 VERBOSE("%s: mpidr: 0x%lx, cpuid: %x\n", 34 __func__, mpidr, cpu_id); 35 36 if (cpu_id == -1) { 37 return PSCI_E_INTERN_FAIL; 38 } 39 40 proc = pm_get_proc(cpu_id); 41 if (!proc) { 42 return PSCI_E_INTERN_FAIL; 43 } 44 45 pm_req_wakeup(proc->node_id, (versal_net_sec_entry & 0xFFFFFFFFU) | 0x1U, 46 versal_net_sec_entry >> 32, 0, 0); 47 48 /* Clear power down request */ 49 pm_client_wakeup(proc); 50 51 return PSCI_E_SUCCESS; 52 } 53 54 /** 55 * versal_net_pwr_domain_off() - This function performs actions to turn off 56 * core. 57 * @target_state: Targeted state. 58 * 59 */ 60 static void versal_net_pwr_domain_off(const psci_power_state_t *target_state) 61 { 62 uint32_t cpu_id = plat_my_core_pos(); 63 const struct pm_proc *proc = pm_get_proc(cpu_id); 64 65 for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++) { 66 VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n", 67 __func__, i, target_state->pwr_domain_state[i]); 68 } 69 70 /* Prevent interrupts from spuriously waking up this cpu */ 71 plat_arm_gic_cpuif_disable(); 72 73 /* 74 * Send request to PMC to power down the appropriate APU CPU 75 * core. 76 * According to PSCI specification, CPU_off function does not 77 * have resume address and CPU core can only be woken up 78 * invoking CPU_on function, during which resume address will 79 * be set. 80 */ 81 pm_self_suspend(proc->node_id, MAX_LATENCY, PM_STATE_CPU_IDLE, 0, 82 SECURE_FLAG); 83 } 84 85 /** 86 * versal_net_system_reset() - This function sends the reset request to firmware 87 * for the system to reset. This function does not 88 * return. 89 * 90 */ 91 static void __dead2 versal_net_system_reset(void) 92 { 93 uint32_t ret, timeout = 10000U; 94 95 request_cpu_pwrdwn(); 96 97 /* 98 * Send the system reset request to the firmware if power down request 99 * is not received from firmware. 100 */ 101 if (!pwrdwn_req_received) { 102 (void)pm_system_shutdown(XPM_SHUTDOWN_TYPE_RESET, 103 pm_get_shutdown_scope(), SECURE_FLAG); 104 105 /* 106 * Wait for system shutdown request completed and idle callback 107 * not received. 108 */ 109 do { 110 ret = ipi_mb_enquire_status(primary_proc->ipi->local_ipi_id, 111 primary_proc->ipi->remote_ipi_id); 112 udelay(100); 113 timeout--; 114 } while ((ret != IPI_MB_STATUS_RECV_PENDING) && (timeout > 0U)); 115 } 116 117 (void)psci_cpu_off(); 118 119 while (1) { 120 wfi(); 121 } 122 } 123 124 /** 125 * versal_net_pwr_domain_suspend() - This function sends request to PMC to suspend 126 * core. 127 * @target_state: Targeted state. 128 * 129 */ 130 static void versal_net_pwr_domain_suspend(const psci_power_state_t *target_state) 131 { 132 uint32_t state; 133 uint32_t cpu_id = plat_my_core_pos(); 134 const struct pm_proc *proc = pm_get_proc(cpu_id); 135 136 for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++) { 137 VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n", 138 __func__, i, target_state->pwr_domain_state[i]); 139 } 140 141 plat_arm_gic_cpuif_disable(); 142 143 if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) { 144 plat_arm_gic_save(); 145 } 146 147 state = target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE ? 148 PM_STATE_SUSPEND_TO_RAM : PM_STATE_CPU_IDLE; 149 150 /* Send request to PMC to suspend this core */ 151 pm_self_suspend(proc->node_id, MAX_LATENCY, state, versal_net_sec_entry, 152 SECURE_FLAG); 153 154 /* TODO: disable coherency */ 155 } 156 157 static void versal_net_pwr_domain_on_finish(const psci_power_state_t *target_state) 158 { 159 (void)target_state; 160 161 /* Enable the gic cpu interface */ 162 plat_arm_gic_pcpu_init(); 163 164 /* Program the gic per-cpu distributor or re-distributor interface */ 165 plat_arm_gic_cpuif_enable(); 166 } 167 168 /** 169 * versal_net_pwr_domain_suspend_finish() - This function performs actions to finish 170 * suspend procedure. 171 * @target_state: Targeted state. 172 * 173 */ 174 static void versal_net_pwr_domain_suspend_finish(const psci_power_state_t *target_state) 175 { 176 uint32_t cpu_id = plat_my_core_pos(); 177 const struct pm_proc *proc = pm_get_proc(cpu_id); 178 179 for (size_t i = 0; i <= PLAT_MAX_PWR_LVL; i++) 180 VERBOSE("%s: target_state->pwr_domain_state[%lu]=%x\n", 181 __func__, i, target_state->pwr_domain_state[i]); 182 183 /* Clear the APU power control register for this cpu */ 184 pm_client_wakeup(proc); 185 186 /* TODO: enable coherency */ 187 188 /* APU was turned off, so restore GIC context */ 189 if (target_state->pwr_domain_state[1] > PLAT_MAX_RET_STATE) { 190 plat_arm_gic_resume(); 191 } 192 193 plat_arm_gic_cpuif_enable(); 194 } 195 196 /** 197 * versal_net_system_off() - This function sends the system off request 198 * to firmware. This function does not return. 199 * 200 */ 201 static void __dead2 versal_net_system_off(void) 202 { 203 /* Send the power down request to the PMC */ 204 pm_system_shutdown(XPM_SHUTDOWN_TYPE_SHUTDOWN, 205 pm_get_shutdown_scope(), SECURE_FLAG); 206 207 while (1) { 208 wfi(); 209 } 210 } 211 212 /** 213 * versal_net_validate_power_state() - This function ensures that the power state 214 * parameter in request is valid. 215 * @power_state: Power state of core. 216 * @req_state: Requested state. 217 * 218 * Return: Returns status, either PSCI_E_SUCCESS or reason. 219 * 220 */ 221 static int32_t versal_net_validate_power_state(unsigned int power_state, 222 psci_power_state_t *req_state) 223 { 224 VERBOSE("%s: power_state: 0x%x\n", __func__, power_state); 225 226 int32_t pstate = psci_get_pstate_type(power_state); 227 228 assert(req_state); 229 230 /* Sanity check the requested state */ 231 if (pstate == PSTATE_TYPE_STANDBY) { 232 req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_RET_STATE; 233 } else { 234 req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE; 235 } 236 237 /* We expect the 'state id' to be zero */ 238 if (psci_get_pstate_id(power_state)) { 239 return PSCI_E_INVALID_PARAMS; 240 } 241 242 return PSCI_E_SUCCESS; 243 } 244 245 /** 246 * versal_net_get_sys_suspend_power_state() - Get power state for system 247 * suspend. 248 * @req_state: Requested state. 249 * 250 */ 251 static void versal_net_get_sys_suspend_power_state(psci_power_state_t *req_state) 252 { 253 uint64_t i; 254 255 for (i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++) 256 req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE; 257 } 258 259 static const struct plat_psci_ops versal_net_nopmc_psci_ops = { 260 .pwr_domain_on = versal_net_pwr_domain_on, 261 .pwr_domain_off = versal_net_pwr_domain_off, 262 .pwr_domain_on_finish = versal_net_pwr_domain_on_finish, 263 .pwr_domain_suspend = versal_net_pwr_domain_suspend, 264 .pwr_domain_suspend_finish = versal_net_pwr_domain_suspend_finish, 265 .system_off = versal_net_system_off, 266 .system_reset = versal_net_system_reset, 267 .validate_power_state = versal_net_validate_power_state, 268 .get_sys_suspend_power_state = versal_net_get_sys_suspend_power_state, 269 }; 270 271 /******************************************************************************* 272 * Export the platform specific power ops. 273 ******************************************************************************/ 274 int32_t plat_setup_psci_ops(uintptr_t sec_entrypoint, 275 const struct plat_psci_ops **psci_ops) 276 { 277 versal_net_sec_entry = sec_entrypoint; 278 279 VERBOSE("Setting up entry point %lx\n", versal_net_sec_entry); 280 281 *psci_ops = &versal_net_nopmc_psci_ops; 282 283 return 0; 284 } 285 286 int32_t sip_svc_setup_init(void) 287 { 288 return pm_setup(); 289 } 290 291 uint64_t smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3, uint64_t x4, 292 void *cookie, void *handle, uint64_t flags) 293 { 294 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 295 } 296