1 /* 2 * Copyright (c) 2019-2022, Xilinx, Inc. All rights reserved. 3 * Copyright (c) 2022-2025, Advanced Micro Devices, Inc. All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-3-Clause 6 */ 7 8 /* 9 * APU specific definition of processors in the subsystem as well as functions 10 * for getting information about and changing state of the APU. 11 */ 12 13 #include <assert.h> 14 15 #include <drivers/arm/gic_common.h> 16 #include <drivers/arm/gicv3.h> 17 #include <lib/bakery_lock.h> 18 #include <lib/mmio.h> 19 #include <lib/utils.h> 20 #include <plat/common/platform.h> 21 22 #include <plat_ipi.h> 23 #include <platform_def.h> 24 #include "pm_api_sys.h" 25 #include "pm_client.h" 26 #include "pm_defs.h" 27 #include <versal_def.h> 28 29 #define UNDEFINED_CPUID (~0U) 30 31 static DEFINE_BAKERY_LOCK(pm_client_secure_lock); 32 33 static const struct pm_ipi apu_ipi = { 34 .local_ipi_id = IPI_LOCAL_ID, 35 .remote_ipi_id = IPI_REMOTE_ID, 36 .buffer_base = IPI_BUFFER_LOCAL_BASE, 37 }; 38 39 /* Order in pm_procs_all array must match cpu ids */ 40 static const struct pm_proc pm_procs_all[] = { 41 { 42 .node_id = XPM_DEVID_ACPU_0, 43 .ipi = &apu_ipi, 44 .pwrdn_mask = APU_0_PWRCTL_CPUPWRDWNREQ_MASK, 45 }, 46 { 47 .node_id = XPM_DEVID_ACPU_1, 48 .ipi = &apu_ipi, 49 .pwrdn_mask = APU_1_PWRCTL_CPUPWRDWNREQ_MASK, 50 } 51 }; 52 53 const struct pm_proc *primary_proc = &pm_procs_all[0]; 54 55 /** 56 * irq_to_pm_node_idx - Get PM node index corresponding to the interrupt number. 57 * @irq: Interrupt number 58 * 59 * Return: PM node index corresponding to the specified interrupt. 60 * 61 */ 62 enum pm_device_node_idx irq_to_pm_node_idx(uint32_t irq) 63 { 64 enum pm_device_node_idx dev_idx = XPM_NODEIDX_DEV_MIN; 65 66 assert(irq <= IRQ_MAX); 67 68 switch (irq) { 69 case 13: 70 dev_idx = XPM_NODEIDX_DEV_GPIO; 71 break; 72 case 14: 73 dev_idx = XPM_NODEIDX_DEV_I2C_0; 74 break; 75 case 15: 76 dev_idx = XPM_NODEIDX_DEV_I2C_1; 77 break; 78 case 16: 79 dev_idx = XPM_NODEIDX_DEV_SPI_0; 80 break; 81 case 17: 82 dev_idx = XPM_NODEIDX_DEV_SPI_1; 83 break; 84 case 18: 85 dev_idx = XPM_NODEIDX_DEV_UART_0; 86 break; 87 case 19: 88 dev_idx = XPM_NODEIDX_DEV_UART_1; 89 break; 90 case 20: 91 dev_idx = XPM_NODEIDX_DEV_CAN_FD_0; 92 break; 93 case 21: 94 dev_idx = XPM_NODEIDX_DEV_CAN_FD_1; 95 break; 96 case 22: 97 case 23: 98 case 24: 99 case 25: 100 case 26: 101 dev_idx = XPM_NODEIDX_DEV_USB_0; 102 break; 103 case 37: 104 case 38: 105 case 39: 106 dev_idx = XPM_NODEIDX_DEV_TTC_0; 107 break; 108 case 40: 109 case 41: 110 case 42: 111 dev_idx = XPM_NODEIDX_DEV_TTC_1; 112 break; 113 case 43: 114 case 44: 115 case 45: 116 dev_idx = XPM_NODEIDX_DEV_TTC_2; 117 break; 118 case 46: 119 case 47: 120 case 48: 121 dev_idx = XPM_NODEIDX_DEV_TTC_3; 122 break; 123 case 56: 124 case 57: 125 dev_idx = XPM_NODEIDX_DEV_GEM_0; 126 break; 127 case 58: 128 case 59: 129 dev_idx = XPM_NODEIDX_DEV_GEM_1; 130 break; 131 case 60: 132 dev_idx = XPM_NODEIDX_DEV_ADMA_0; 133 break; 134 case 61: 135 dev_idx = XPM_NODEIDX_DEV_ADMA_1; 136 break; 137 case 62: 138 dev_idx = XPM_NODEIDX_DEV_ADMA_2; 139 break; 140 case 63: 141 dev_idx = XPM_NODEIDX_DEV_ADMA_3; 142 break; 143 case 64: 144 dev_idx = XPM_NODEIDX_DEV_ADMA_4; 145 break; 146 case 65: 147 dev_idx = XPM_NODEIDX_DEV_ADMA_5; 148 break; 149 case 66: 150 dev_idx = XPM_NODEIDX_DEV_ADMA_6; 151 break; 152 case 67: 153 dev_idx = XPM_NODEIDX_DEV_ADMA_7; 154 break; 155 case 74: 156 dev_idx = XPM_NODEIDX_DEV_USB_0; 157 break; 158 case 122: 159 dev_idx = XPM_NODEIDX_DEV_GPIO_PMC; 160 break; 161 case 126: 162 case 127: 163 dev_idx = XPM_NODEIDX_DEV_SDIO_0; 164 break; 165 case 128: 166 case 129: 167 dev_idx = XPM_NODEIDX_DEV_SDIO_1; 168 break; 169 case 142: 170 dev_idx = XPM_NODEIDX_DEV_RTC; 171 break; 172 default: 173 dev_idx = XPM_NODEIDX_DEV_MIN; 174 break; 175 } 176 177 return dev_idx; 178 } 179 180 /** 181 * pm_client_suspend() - Client-specific suspend actions. 182 * @proc: processor which need to suspend. 183 * @state: desired suspend state. 184 * 185 * This function should contain any PU-specific actions 186 * required prior to sending suspend request to PMU 187 * Actions taken depend on the state system is suspending to. 188 * 189 */ 190 void pm_client_suspend(const struct pm_proc *proc, uint32_t state) 191 { 192 bakery_lock_get(&pm_client_secure_lock); 193 194 if (state == PM_STATE_SUSPEND_TO_RAM) { 195 pm_client_set_wakeup_sources((uint32_t)proc->node_id); 196 } 197 198 /* Set powerdown request */ 199 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) | 200 (uint32_t)proc->pwrdn_mask); 201 202 bakery_lock_release(&pm_client_secure_lock); 203 } 204 205 /** 206 * pm_client_abort_suspend() - Client-specific abort-suspend actions. 207 * 208 * This function should contain any PU-specific actions 209 * required for aborting a prior suspend request. 210 * 211 */ 212 void pm_client_abort_suspend(void) 213 { 214 /* Enable interrupts at processor level (for current cpu) */ 215 gicv3_cpuif_enable(plat_my_core_pos()); 216 217 bakery_lock_get(&pm_client_secure_lock); 218 219 /* Clear powerdown request */ 220 mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) & 221 ~((uint32_t)primary_proc->pwrdn_mask)); 222 223 bakery_lock_release(&pm_client_secure_lock); 224 } 225 226 /** 227 * pm_get_cpuid() - get the local cpu ID for a global node ID. 228 * @nid: node id of the processor. 229 * 230 * Return: the cpu ID (starting from 0) for the subsystem. 231 * 232 */ 233 static uint32_t pm_get_cpuid(uint32_t nid) 234 { 235 uint32_t ret = UNDEFINED_CPUID; 236 uint32_t i; 237 238 for (i = 0U; i < ARRAY_SIZE(pm_procs_all); i++) { 239 if (pm_procs_all[i].node_id == nid) { 240 ret = i; 241 break; 242 } 243 } 244 return ret; 245 } 246 247 /** 248 * pm_client_wakeup() - Client-specific wakeup actions. 249 * @proc: Processor which need to wakeup. 250 * 251 * This function should contain any PU-specific actions 252 * required for waking up another APU core. 253 * 254 */ 255 void pm_client_wakeup(const struct pm_proc *proc) 256 { 257 uint32_t cpuid = pm_get_cpuid(proc->node_id); 258 259 if (cpuid == UNDEFINED_CPUID) { 260 return; 261 } 262 263 bakery_lock_get(&pm_client_secure_lock); 264 265 /* clear powerdown bit for affected cpu */ 266 uint32_t val = mmio_read_32(FPD_APU_PWRCTL); 267 val &= ~(proc->pwrdn_mask); 268 mmio_write_32(FPD_APU_PWRCTL, val); 269 270 bakery_lock_release(&pm_client_secure_lock); 271 } 272 273 /** 274 * pm_get_proc() - returns pointer to the proc structure. 275 * @cpuid: id of the cpu whose proc struct pointer should be returned. 276 * 277 * Return: pointer to a proc structure if proc is found, otherwise NULL. 278 * 279 */ 280 const struct pm_proc *pm_get_proc(uint32_t cpuid) 281 { 282 if (cpuid < ARRAY_SIZE(pm_procs_all)) { 283 return &pm_procs_all[cpuid]; 284 } 285 286 return NULL; 287 } 288